Using electric motors instead of diesel engines as the driving system for mining excavators can reduce the energy consumption and operating costs.However,pure electric-driven mining excavators are prone to unexpected ...Using electric motors instead of diesel engines as the driving system for mining excavators can reduce the energy consumption and operating costs.However,pure electric-driven mining excavators are prone to unexpected power outages in mines because of drastic changes in load power,leading to significant fluctuations in the power demand of the grid,which in turn affects production.To solve the above problem,a pure electric-driven mining hydraulic excavator based on electric-motor-driven swing platform and hydraulic pumps was used as the research object.Moreover,supercapacitors and DC/DC converter,as the energy storage system(ESS)adjust the output power of the grid and recover the braking kinetic energy of the swing platform.Subsequently,a novel integrated energy management strategy for a DC bus voltage predictive controller based on the power feedforward of fuzzy rules is proposed to run mining excavators efficiently and reliably.Specifically,the working modes of the ESS are determined by the DC bus voltage and state of charge(SOC)of the supercapacitor.Next,the output power of the supercapacitor and the DC bus voltage were controlled by adjusting the charging and discharging currents of the DC/DC converter using a predictive controller and fuzzy rules.In addition,a digital prototype of the excavator was verified using an original machine test.The performance of the different strategies and driven systems were analyzed using digital prototypes.The results showed that,compared with traditional excavators with diesel engines,the operational cost of the developed excavators was reduced by 54.02%.Compared to pure electric-driven excavators without an ESS,the peak power of the grid for the developed excavators was reduced by 10%.This study designed an integrated energy management strategy for a pure electric mining excavator that can regulate the power output of the grid and maintain the stability of the bus voltage and SOC of the ESS.展开更多
Hydrogen fuel cell ships are one of the key solutions to achieving zero carbon emissions in shipping.Multi-fuel cell stacks(MFCS)systems are frequently employed to fulfill the power requirements of high-load power equ...Hydrogen fuel cell ships are one of the key solutions to achieving zero carbon emissions in shipping.Multi-fuel cell stacks(MFCS)systems are frequently employed to fulfill the power requirements of high-load power equipment on ships.Compared to single-stack system,MFCS may be difficult to apply traditional energy management strategies(EMS)due to their complex structure.In this paper,a two-layer power allocation strategy for MFCS of a hydrogen fuel cell ship is proposed to reduce the complexity of the allocation task by splitting it into each layer of the EMS.The first layer of the EMSis centered on the Nonlinear Model Predictive Control(NMPC).The Northern Goshawk Optimization(NGO)algorithm is used to solve the nonlinear optimization problem in NMPC,and the local fine search is performed using sequential quadratic programming(SQP).Based on the power allocation results of the first layer,the second layer is centered on a fuzzy rule-based adaptive power allocation strategy(AP-Fuzzy).The membership function bounds of the fuzzy controller are related to the aging level of the MFCS.The Particle Swarm Optimization(PSO)algorithm is used to optimize the parameters of the residual membership function to improve the performance of the proposed strategy.The effectiveness of the proposed EMS is verified by comparing it with the traditional EMS.The experimental results show that the EMS proposed in this paper can ensure reasonable hydrogen consumption,slow down the FC aging and equalize its performance,effectively extend the system life,and ensure that the ship has good endurance after completing the mission.展开更多
Plug-in Hybrid Electric Vehicles(PHEVs)represent an innovative breed of transportation,harnessing diverse power sources for enhanced performance.Energy management strategies(EMSs)that coordinate and control different ...Plug-in Hybrid Electric Vehicles(PHEVs)represent an innovative breed of transportation,harnessing diverse power sources for enhanced performance.Energy management strategies(EMSs)that coordinate and control different energy sources is a critical component of PHEV control technology,directly impacting overall vehicle performance.This study proposes an improved deep reinforcement learning(DRL)-based EMSthat optimizes realtime energy allocation and coordinates the operation of multiple power sources.Conventional DRL algorithms struggle to effectively explore all possible state-action combinations within high-dimensional state and action spaces.They often fail to strike an optimal balance between exploration and exploitation,and their assumption of a static environment limits their ability to adapt to changing conditions.Moreover,these algorithms suffer from low sample efficiency.Collectively,these factors contribute to convergence difficulties,low learning efficiency,and instability.To address these challenges,the Deep Deterministic Policy Gradient(DDPG)algorithm is enhanced using entropy regularization and a summation tree-based Prioritized Experience Replay(PER)method,aiming to improve exploration performance and learning efficiency from experience samples.Additionally,the correspondingMarkovDecision Process(MDP)is established.Finally,an EMSbased on the improvedDRLmodel is presented.Comparative simulation experiments are conducted against rule-based,optimization-based,andDRL-based EMSs.The proposed strategy exhibitsminimal deviation fromthe optimal solution obtained by the dynamic programming(DP)strategy that requires global information.In the typical driving scenarios based onWorld Light Vehicle Test Cycle(WLTC)and New European Driving Cycle(NEDC),the proposed method achieved a fuel consumption of 2698.65 g and an Equivalent Fuel Consumption(EFC)of 2696.77 g.Compared to the DP strategy baseline,the proposed method improved the fuel efficiency variances(FEV)by 18.13%,15.1%,and 8.37%over the Deep QNetwork(DQN),Double DRL(DDRL),and original DDPG methods,respectively.The observational outcomes demonstrate that the proposed EMS based on improved DRL framework possesses good real-time performance,stability,and reliability,effectively optimizing vehicle economy and fuel consumption.展开更多
“Li Ziqi”is not only a Chinese girl,but also a cultural brand of new media with certain international influence.Currently,she has more than 20 million fans on the YouTube platform.In July 2021,she stopped making wor...“Li Ziqi”is not only a Chinese girl,but also a cultural brand of new media with certain international influence.Currently,she has more than 20 million fans on the YouTube platform.In July 2021,she stopped making works,and then gradually faded from the public eye.Until November 12,2024,she released her new work“Carved Lacquer With Hidden Flowers,Carrying Auspiciousness!”For a while,the whole network was boiling,netizens rushed to tell each other,the video has been played more than 100 million times,and she easily returned to the“top of flow rate”.In today’s ever-changing world,why does her work continue to be popular after she stopped working for 1,200 days?The way of management is worth thinking about.This paper analyzes the Weibo comments data of her first work of comeback,to explore the cultural brand management strategy of new media.展开更多
To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strength...To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strengthen the construction of the automobile transportation logistics supply chain management model.This can be achieved through the gradual improvement of the automobile transportation logistics management process,ensuring that the management of the automobile transportation logistics supply chain proceeds in an orderly manner.The aim is to improve automobile transportation and logistics service levels while meeting the changing market supply needs.This will enable automobile transportation and logistics enterprises to maintain steady economic benefits and enhance their core competitiveness in the market.Therefore,this paper has conducted a comprehensive exploration and research on managing the automobile transportation logistics supply chain.Corresponding management strategies are proposed as a starting point to achieve the aforementioned goals.展开更多
With the rapid development and widespread application of Big Data technology, the supply chain management of agricultural products enterprises is facing unprecedented reform and challenges. This study takes the perspe...With the rapid development and widespread application of Big Data technology, the supply chain management of agricultural products enterprises is facing unprecedented reform and challenges. This study takes the perspective of Big Data technology and collects relevant information on the application of supply chain management in 100 agricultural product enterprises through a survey questionnaire. The study found that the use of Big Data can effectively improve the accuracy of demand forecasting, inventory management efficiency, optimize logistics costs, improve supplier management efficiency, enhance the overall level of supply chain management of enterprises, and propose innovative strategies for supply chain management of agricultural products enterprises based on this. Big Data technology brings a new solution for agricultural products enterprises to enhance their supply chain management level, making the supply chain smarter and more efficient.展开更多
From the perspective of enterprise marketing strategy planning,innovative research should be conducted based on the current trends in new media.The findings should be applied to practical activities within enterprises...From the perspective of enterprise marketing strategy planning,innovative research should be conducted based on the current trends in new media.The findings should be applied to practical activities within enterprises to achieve innovation in marketing strategy decision-making in the new media environment.Enterprises should adopt advanced communication transmission technologies and big data processing capabilities to effectively leverage the hidden value and promotional planning advantages of network media platforms.This approach can enhance customer loyalty and increase demand for new products.Enterprises should integrate into the continuously evolving new media landscape,explore their potential business characteristics,and innovate promotional methods.By effectively combining product information with digital media content,companies can ultimately achieve significant increases in corporate interests.展开更多
Accurately estimating the wheat yield potential under climate changes is essential for assessing food production capacity. However, studies based on crop modeling and imperfect management experiment data frequently un...Accurately estimating the wheat yield potential under climate changes is essential for assessing food production capacity. However, studies based on crop modeling and imperfect management experiment data frequently underestimate the wheat yield potential. In this study, we evaluated wheat yield potential based on the CERES-Wheat model and a well-managed 10-year(2008–2017) field study in the North China Plain(NCP), and further identified the critical climate and management yield-limiting factors for improving wheat yield potential and closing the wheat yield gap. Our results revealed that wheat yield potential averaged 10.8 t ha–1in the recent decade. The low growing degree days(GDD) in the pre-winter growing season(592℃ d) and solar radiation in the whole growth season(3,036 MJ m–2) are the most critical climatic factors limiting wheat yield potential in the current production system. Nonetheless, wheat yield potential in the NCP is projected to decline during 2040–2059 by 1.8 and 5.1% under the representative concentration pathway(RCP) 4.5 and RCP8.5 scenarios, respectively, without considering the elevated CO_(2) concentration. However, the positive influence of CO_(2) fertilization will be sufficient to offset these negative impacts from climatic warming and solar dimming, ultimately leading to an enhancement in wheat yield potential during 2040–2059 by 7.5 and 9.8% compared to the baseline under RCP4.5 and RCP8.5, respectively. To improve the wheat yield potential, we recommend selecting an appropriate planting date(5 October) and planting density(400 plants m–2) that align with light and temperature conditions during the wheat growing season. In addition, optimizing the timing and rate of water application(three times, 270 mm) and fertilizer use(based on inseason root zone nitrogen management) is crucial for closing the wheat yield gap. This study underscores the importance of adopting multiple management practices that account for complex climate–crop–soil interconnections to enhance the wheat yield based on a long-term field experiment under the changing climate.展开更多
This article focuses on financial management issues in mergers and acquisitions(M&A).It provides an indepth analysis of the financial risks and management challenges faced by contemporary businesses during various...This article focuses on financial management issues in mergers and acquisitions(M&A).It provides an indepth analysis of the financial risks and management challenges faced by contemporary businesses during various stages of M&A,such as pre-merger valuation pricing difficulties,unreasonable financing structures,risks in payment method selection,obstacles to financial integration,and lack of risk management.Targeted management strategies are proposed to address these issues.This paper suggests strengthening due diligence and valuation management,optimizing financing structures,rationally selecting payment methods,deepening financial integration,and improving tax planning.These strategies aim to enhance the level of financial management in M&A,promote economic synergies and management effects,help companies quickly achieve M&A goals,and drive sustainable business development.展开更多
[Objectives]To systematically analyze the epidemiological characteristics and influencing factors associated with a cohort of 3273 rural patients diagnosed with mental disorders in Zhushan County,Hubei Province and ex...[Objectives]To systematically analyze the epidemiological characteristics and influencing factors associated with a cohort of 3273 rural patients diagnosed with mental disorders in Zhushan County,Hubei Province and explore an integrated management path that is applicable to rural areas.[Methods]A cross-sectional survey,in conjunction with a retrospective cohort analysis,was conducted.The samples were obtained from the National Management Information System for Severe Mental Disorders(2020-2024),and all registered rural patients in Zhushan County were included through cluster sampling.All participants provided informed consent,and the study received approval from the Ethics Committee of the Zhushan County Mental Health Center.Diagnoses were made in accordance with the International Classification of Diseases,10 th Revision(ICD-10).The research utilized a self-developed socio-ecological scale,which was validated through two rounds of the Delphi method conducted by an expert group,yielding a Cronbach sαof 0.82.The data were collected by trained investigators who conducted household visits.The data entry process involved double entry by two individuals to ensure accuracy for system review.Statistical analysis was performed using SPSS 26.0,employing the chi-square(χ2)test and logistic regression models for analysis.[Results]Schizophrenia was identified as the predominant disorder,affecting 68.4%of the patient population,followed by bipolar disorder,which accounted for 18.8%.Notably,individuals aged over 60 years constituted 40.36%of the sample.Furthermore,the poverty rate within this population was alarmingly high at 87.87%,while the illiteracy rate stood at 41.37%.The treatment experienced a significant delay,with a median duration of 14.2 months.Additionally,there was a substantial gap in standardized treatment,measured at 23.59%.The family care function was found to be inadequate,particularly for families lacking guardianship capacity,which was reported at 11.31%.An analysis of the underlying causes indicates that social structural imbalances(such as left-behind children and marital breakdown),along with economic poverty and insufficient educational opportunities,were critical risk factors contributing to these issues.The development of a model that integrates dynamic screening,full-chain intervention,and collaborative management is beneficial for fostering the efficient and systematic advancement of the rural mental health system.[Conclusions]Patients with mental disorders residing in rural areas face dual vulnerabilities.Therefore,it is essential to implement integrated management that encompasses early screening,standardized treatment,family support,and policy assistance.It is recommended that these elements should be integrated into the framework for local health policy development to enhance equitable access to mental health services and to provide psychological support for rural revitalization efforts.展开更多
Transjugular intrahepatic portosystemic shunts(TIPSs)are generally used for the management of complications of portal hypertension in patients with decompensated cirrhosis.However,hepatic encephalopathy(HE),which impa...Transjugular intrahepatic portosystemic shunts(TIPSs)are generally used for the management of complications of portal hypertension in patients with decompensated cirrhosis.However,hepatic encephalopathy(HE),which impairs neuropsychiatric function and motor control,remains the primary adverse effect of TIPS,limiting its utility.Prompt prevention and treatment of post-TIPS HE are critical,as they are strongly associated with readmission rates and poor quality of life.This review focuses on the main pathophysiological mechanisms underlying post-TIPS HE,explores advanced biomarkers and predictive tools,and discusses current management strategies and future directions to prevent or reverse HE following TIPS.These strategies include preoperative patient assessment,individualized shunt diameter optimization,spontaneous portosystemic shunt embolization during the TIPS procedure,postoperative preventive and therapeutic measures such as nutrition management,medical therapy,fecal microbiota transplantation,and stent reduction.展开更多
This paper applies conflict management theory to study customer conflicts in budget hotels.Utilizing investigations and data analysis from budget hotels in Guilin,Guangxi Province,China,it identifies the factors that ...This paper applies conflict management theory to study customer conflicts in budget hotels.Utilizing investigations and data analysis from budget hotels in Guilin,Guangxi Province,China,it identifies the factors that influence the formation of customer conflicts and describes the characteristics of each stage in the development process,as well as the dual role of the conflicts.The paper also presents strategies for managing the transition from non-confrontational to confrontational conflicts.展开更多
Invasive alien species(IAS)significantly threaten global biodiversity and ecosystem stability.Despite increasing management efforts,a critical knowledge gap existed in understanding commonalities and disparities among...Invasive alien species(IAS)significantly threaten global biodiversity and ecosystem stability.Despite increasing management efforts,a critical knowledge gap existed in understanding commonalities and disparities among national strategies.We analyzed several IAS management lists from 23 countries and the European Union,focusing specifically on vascular plant species within these lists.List composition,characteristics,and associated management measures were analyzed.Key patterns in species prioritization across national lists and intercontinental exchange of invasive alien plants(IAPs)were identified.Pistia stratiotes,Pontederia crassipes,Salvinia molesta,Cabomba caroliniana,Ulex europaeus were identified as globally recognized threats,being listed by at least 33.3%of analyzed countries and invading five or more continents.Aquatic plants were found to be more frequently included in management lists.A significant directional invasion pattern between the Eastern and Western Hemispheres was identified.Species native to Asia were observed to dominate as significant donors of IAPs across continents.The analysis of list management strategies highlighted substantial gaps in achieving Target 6 of the Kunming-Montreal Global Biodiversity Framework,particularly in species prioritization and inclusion of potential IAPs.In response to these challenges,a tiered classification system for invasive alien species list was proposed,encompassing High-Priority,Watchlist,Potential,and Priority Site categories,which aimed at enhancing management effectiveness by tailoring strategies to different invasion stages and ecological contexts.This study could contribute to understanding global IAPs management strategies and serve as a reference for policymakers and conservation managers to identify priority IAPs and refine management approaches.展开更多
Gastric retention is a common complication in individuals receiving enteral nutrition(EN)via a nasogastric tube,increasing the risk of aspiration pneumonia and causing unnecessary interruptions in nutritional support....Gastric retention is a common complication in individuals receiving enteral nutrition(EN)via a nasogastric tube,increasing the risk of aspiration pneumonia and causing unnecessary interruptions in nutritional support.Given its clinical significance,establishing effective,evidence-based,and standardized manage-ment strategies is essential for bettering patient outcomes and mitigating compli-cations.This review systematically synthesized the diagnostic criteria,assessment methods,influencing factors,management procedures,and intervention strategies for gastric retention in EN patients.Although no universal consensus exists re-garding gastric residual volume(GRV)thresholds,evidence indicates that EN can continue at high GRV levels in the absence of gastrointestinal symptoms.Bedside ultrasound emerged as a non-invasive,and precise method GRV assessment,offering potential to standardize clinical practice.Key risk factors for gastric retention include neurological disorders and EN infusion rates exceeding 100 mL/h.Effective management strategies encompass non-pharmacological inter-ventions,pharmacological agents,and traditional Chinese medicine(TCM)the-rapies.This review underscored the need for integrated,multi-modal manage-ment strategies and recommended the adoption of bedside ultrasound and stan-dardized protocols to optimize EN delivery and improve patient outcomes.Large-scale,multicenter clinical trials should be a priority for future investigation to verify the effectiveness of TCM therapies and develop personalized intervention plans for high-risk patients.展开更多
Objective:To analyze the application value of prescription management of traditional Chinese medicine formula granules in reducing unreasonable prescriptions.Methods:From January to June 2024,before improving prescrip...Objective:To analyze the application value of prescription management of traditional Chinese medicine formula granules in reducing unreasonable prescriptions.Methods:From January to June 2024,before improving prescription management strategies,118 patients treated with traditional Chinese medicine formula granules were included in the control group.From July to December 2024,after improving prescription management strategies,118 patients treated with traditional Chinese medicine formula granules were included in the observation group.The unqualified prescription rate,incidence of adverse reactions,complaint rate,and satisfaction were compared.Results:The unqualified prescription rate of traditional Chinese medicine formula granules in the observation group was lower than that in the control group(P<0.05);the incidence of adverse reactions and patient complaint rate of traditional Chinese medicine formula granules in the observation group were lower than those in the control group(P<0.05);the satisfaction of traditional Chinese medicine formula granules in the observation group was higher than that in the control group(P<0.05).Conclusion:Improving the prescription management strategy of traditional Chinese medicine formula granules can reduce the unqualified prescription rate and the incidence of adverse drug reactions,reduce patient complaints,and is conducive to improving patient satisfaction.展开更多
Energy management strategy (EMS) is the core of the real-time controlalgorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach withincorporation of a stand-by optimization algorith...Energy management strategy (EMS) is the core of the real-time controlalgorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach withincorporation of a stand-by optimization algorithm is proposed. The aim of it is to minimize theengine fuel consumption and maintain the battery state of charge (SOC) in its operation range, whilesatisfying the vehicle performance and drivability requirements. The hybrid powertrain bench testis carried out to collect data of the engine, motor and battery pack, which are used in the EMS tocontrol the powertrain. Computer simulation model of the HEV is established in the MATLAB/Simulinkenvironment according to the bench test results. Simulation results are presented for behaviors ofthe engine, motor and battery. The proposed EMS is implemented for a real parallel hybrid carcontrol system and validated by vehicle field tests.展开更多
The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory. Tetrany-chus cinnabar...The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory. Tetrany-chus cinnabarinus was continuously selected with fenpropathrin, abamectin and pyridaban for 28, 30 and 31 generations, respectively, and resistance factor increased to 65.6, 7.2 and 1.2 time, accordingly. Results of cross-resistance determination suggested that there were no cross-resistance existed among the three acaricides. Analysis of resistance selection and estimation of realized heritability (h2) of resistance to three single and two mixed acaricides showed that a mixture of fenpropathrin+abamectin would slow resistance development compared with a sequence of fenpropathrin followed by abamectin while the mixture of pyridaben+abamectin and the sequence of pyridaben followed by abamectin would effectively retard resistance evolution.展开更多
The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device s...The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device stability.Here,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up modification.The synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,respectively.Through TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved stability.With post-treatment,the efficiency is further improved to 23.63%.展开更多
基金Supported by National Natural Science Foundation of ChinaShanxi Coalbased Low-Carbon Joint Fund(Grant No.U1910211)。
文摘Using electric motors instead of diesel engines as the driving system for mining excavators can reduce the energy consumption and operating costs.However,pure electric-driven mining excavators are prone to unexpected power outages in mines because of drastic changes in load power,leading to significant fluctuations in the power demand of the grid,which in turn affects production.To solve the above problem,a pure electric-driven mining hydraulic excavator based on electric-motor-driven swing platform and hydraulic pumps was used as the research object.Moreover,supercapacitors and DC/DC converter,as the energy storage system(ESS)adjust the output power of the grid and recover the braking kinetic energy of the swing platform.Subsequently,a novel integrated energy management strategy for a DC bus voltage predictive controller based on the power feedforward of fuzzy rules is proposed to run mining excavators efficiently and reliably.Specifically,the working modes of the ESS are determined by the DC bus voltage and state of charge(SOC)of the supercapacitor.Next,the output power of the supercapacitor and the DC bus voltage were controlled by adjusting the charging and discharging currents of the DC/DC converter using a predictive controller and fuzzy rules.In addition,a digital prototype of the excavator was verified using an original machine test.The performance of the different strategies and driven systems were analyzed using digital prototypes.The results showed that,compared with traditional excavators with diesel engines,the operational cost of the developed excavators was reduced by 54.02%.Compared to pure electric-driven excavators without an ESS,the peak power of the grid for the developed excavators was reduced by 10%.This study designed an integrated energy management strategy for a pure electric mining excavator that can regulate the power output of the grid and maintain the stability of the bus voltage and SOC of the ESS.
基金supported by the National Key R&D Program of China(2022YFB4301403).
文摘Hydrogen fuel cell ships are one of the key solutions to achieving zero carbon emissions in shipping.Multi-fuel cell stacks(MFCS)systems are frequently employed to fulfill the power requirements of high-load power equipment on ships.Compared to single-stack system,MFCS may be difficult to apply traditional energy management strategies(EMS)due to their complex structure.In this paper,a two-layer power allocation strategy for MFCS of a hydrogen fuel cell ship is proposed to reduce the complexity of the allocation task by splitting it into each layer of the EMS.The first layer of the EMSis centered on the Nonlinear Model Predictive Control(NMPC).The Northern Goshawk Optimization(NGO)algorithm is used to solve the nonlinear optimization problem in NMPC,and the local fine search is performed using sequential quadratic programming(SQP).Based on the power allocation results of the first layer,the second layer is centered on a fuzzy rule-based adaptive power allocation strategy(AP-Fuzzy).The membership function bounds of the fuzzy controller are related to the aging level of the MFCS.The Particle Swarm Optimization(PSO)algorithm is used to optimize the parameters of the residual membership function to improve the performance of the proposed strategy.The effectiveness of the proposed EMS is verified by comparing it with the traditional EMS.The experimental results show that the EMS proposed in this paper can ensure reasonable hydrogen consumption,slow down the FC aging and equalize its performance,effectively extend the system life,and ensure that the ship has good endurance after completing the mission.
文摘Plug-in Hybrid Electric Vehicles(PHEVs)represent an innovative breed of transportation,harnessing diverse power sources for enhanced performance.Energy management strategies(EMSs)that coordinate and control different energy sources is a critical component of PHEV control technology,directly impacting overall vehicle performance.This study proposes an improved deep reinforcement learning(DRL)-based EMSthat optimizes realtime energy allocation and coordinates the operation of multiple power sources.Conventional DRL algorithms struggle to effectively explore all possible state-action combinations within high-dimensional state and action spaces.They often fail to strike an optimal balance between exploration and exploitation,and their assumption of a static environment limits their ability to adapt to changing conditions.Moreover,these algorithms suffer from low sample efficiency.Collectively,these factors contribute to convergence difficulties,low learning efficiency,and instability.To address these challenges,the Deep Deterministic Policy Gradient(DDPG)algorithm is enhanced using entropy regularization and a summation tree-based Prioritized Experience Replay(PER)method,aiming to improve exploration performance and learning efficiency from experience samples.Additionally,the correspondingMarkovDecision Process(MDP)is established.Finally,an EMSbased on the improvedDRLmodel is presented.Comparative simulation experiments are conducted against rule-based,optimization-based,andDRL-based EMSs.The proposed strategy exhibitsminimal deviation fromthe optimal solution obtained by the dynamic programming(DP)strategy that requires global information.In the typical driving scenarios based onWorld Light Vehicle Test Cycle(WLTC)and New European Driving Cycle(NEDC),the proposed method achieved a fuel consumption of 2698.65 g and an Equivalent Fuel Consumption(EFC)of 2696.77 g.Compared to the DP strategy baseline,the proposed method improved the fuel efficiency variances(FEV)by 18.13%,15.1%,and 8.37%over the Deep QNetwork(DQN),Double DRL(DDRL),and original DDPG methods,respectively.The observational outcomes demonstrate that the proposed EMS based on improved DRL framework possesses good real-time performance,stability,and reliability,effectively optimizing vehicle economy and fuel consumption.
文摘“Li Ziqi”is not only a Chinese girl,but also a cultural brand of new media with certain international influence.Currently,she has more than 20 million fans on the YouTube platform.In July 2021,she stopped making works,and then gradually faded from the public eye.Until November 12,2024,she released her new work“Carved Lacquer With Hidden Flowers,Carrying Auspiciousness!”For a while,the whole network was boiling,netizens rushed to tell each other,the video has been played more than 100 million times,and she easily returned to the“top of flow rate”.In today’s ever-changing world,why does her work continue to be popular after she stopped working for 1,200 days?The way of management is worth thinking about.This paper analyzes the Weibo comments data of her first work of comeback,to explore the cultural brand management strategy of new media.
文摘To enhance the management level and quality of the automobile transportation logistics supply chain and promote innovation and development in automobile transportation logistics enterprises,it is essential to strengthen the construction of the automobile transportation logistics supply chain management model.This can be achieved through the gradual improvement of the automobile transportation logistics management process,ensuring that the management of the automobile transportation logistics supply chain proceeds in an orderly manner.The aim is to improve automobile transportation and logistics service levels while meeting the changing market supply needs.This will enable automobile transportation and logistics enterprises to maintain steady economic benefits and enhance their core competitiveness in the market.Therefore,this paper has conducted a comprehensive exploration and research on managing the automobile transportation logistics supply chain.Corresponding management strategies are proposed as a starting point to achieve the aforementioned goals.
文摘With the rapid development and widespread application of Big Data technology, the supply chain management of agricultural products enterprises is facing unprecedented reform and challenges. This study takes the perspective of Big Data technology and collects relevant information on the application of supply chain management in 100 agricultural product enterprises through a survey questionnaire. The study found that the use of Big Data can effectively improve the accuracy of demand forecasting, inventory management efficiency, optimize logistics costs, improve supplier management efficiency, enhance the overall level of supply chain management of enterprises, and propose innovative strategies for supply chain management of agricultural products enterprises based on this. Big Data technology brings a new solution for agricultural products enterprises to enhance their supply chain management level, making the supply chain smarter and more efficient.
文摘From the perspective of enterprise marketing strategy planning,innovative research should be conducted based on the current trends in new media.The findings should be applied to practical activities within enterprises to achieve innovation in marketing strategy decision-making in the new media environment.Enterprises should adopt advanced communication transmission technologies and big data processing capabilities to effectively leverage the hidden value and promotional planning advantages of network media platforms.This approach can enhance customer loyalty and increase demand for new products.Enterprises should integrate into the continuously evolving new media landscape,explore their potential business characteristics,and innovate promotional methods.By effectively combining product information with digital media content,companies can ultimately achieve significant increases in corporate interests.
基金supported by the National Key Research and Development Program of China (2023YFD2302801)the Central Public-interest Scientific Institution Basal Research Fund of Chinese Academy of Agricultural Sciences (JBYW-AII-2024-38)+1 种基金the Fundamental Research Funds for the Central UniversitiesChina Scholarship Council。
文摘Accurately estimating the wheat yield potential under climate changes is essential for assessing food production capacity. However, studies based on crop modeling and imperfect management experiment data frequently underestimate the wheat yield potential. In this study, we evaluated wheat yield potential based on the CERES-Wheat model and a well-managed 10-year(2008–2017) field study in the North China Plain(NCP), and further identified the critical climate and management yield-limiting factors for improving wheat yield potential and closing the wheat yield gap. Our results revealed that wheat yield potential averaged 10.8 t ha–1in the recent decade. The low growing degree days(GDD) in the pre-winter growing season(592℃ d) and solar radiation in the whole growth season(3,036 MJ m–2) are the most critical climatic factors limiting wheat yield potential in the current production system. Nonetheless, wheat yield potential in the NCP is projected to decline during 2040–2059 by 1.8 and 5.1% under the representative concentration pathway(RCP) 4.5 and RCP8.5 scenarios, respectively, without considering the elevated CO_(2) concentration. However, the positive influence of CO_(2) fertilization will be sufficient to offset these negative impacts from climatic warming and solar dimming, ultimately leading to an enhancement in wheat yield potential during 2040–2059 by 7.5 and 9.8% compared to the baseline under RCP4.5 and RCP8.5, respectively. To improve the wheat yield potential, we recommend selecting an appropriate planting date(5 October) and planting density(400 plants m–2) that align with light and temperature conditions during the wheat growing season. In addition, optimizing the timing and rate of water application(three times, 270 mm) and fertilizer use(based on inseason root zone nitrogen management) is crucial for closing the wheat yield gap. This study underscores the importance of adopting multiple management practices that account for complex climate–crop–soil interconnections to enhance the wheat yield based on a long-term field experiment under the changing climate.
文摘This article focuses on financial management issues in mergers and acquisitions(M&A).It provides an indepth analysis of the financial risks and management challenges faced by contemporary businesses during various stages of M&A,such as pre-merger valuation pricing difficulties,unreasonable financing structures,risks in payment method selection,obstacles to financial integration,and lack of risk management.Targeted management strategies are proposed to address these issues.This paper suggests strengthening due diligence and valuation management,optimizing financing structures,rationally selecting payment methods,deepening financial integration,and improving tax planning.These strategies aim to enhance the level of financial management in M&A,promote economic synergies and management effects,help companies quickly achieve M&A goals,and drive sustainable business development.
基金Supported by TCM Scientific Research Guidance Program of Hubei Provincial Administration of Traditional Chinese Medicine(ZY2023F074).
文摘[Objectives]To systematically analyze the epidemiological characteristics and influencing factors associated with a cohort of 3273 rural patients diagnosed with mental disorders in Zhushan County,Hubei Province and explore an integrated management path that is applicable to rural areas.[Methods]A cross-sectional survey,in conjunction with a retrospective cohort analysis,was conducted.The samples were obtained from the National Management Information System for Severe Mental Disorders(2020-2024),and all registered rural patients in Zhushan County were included through cluster sampling.All participants provided informed consent,and the study received approval from the Ethics Committee of the Zhushan County Mental Health Center.Diagnoses were made in accordance with the International Classification of Diseases,10 th Revision(ICD-10).The research utilized a self-developed socio-ecological scale,which was validated through two rounds of the Delphi method conducted by an expert group,yielding a Cronbach sαof 0.82.The data were collected by trained investigators who conducted household visits.The data entry process involved double entry by two individuals to ensure accuracy for system review.Statistical analysis was performed using SPSS 26.0,employing the chi-square(χ2)test and logistic regression models for analysis.[Results]Schizophrenia was identified as the predominant disorder,affecting 68.4%of the patient population,followed by bipolar disorder,which accounted for 18.8%.Notably,individuals aged over 60 years constituted 40.36%of the sample.Furthermore,the poverty rate within this population was alarmingly high at 87.87%,while the illiteracy rate stood at 41.37%.The treatment experienced a significant delay,with a median duration of 14.2 months.Additionally,there was a substantial gap in standardized treatment,measured at 23.59%.The family care function was found to be inadequate,particularly for families lacking guardianship capacity,which was reported at 11.31%.An analysis of the underlying causes indicates that social structural imbalances(such as left-behind children and marital breakdown),along with economic poverty and insufficient educational opportunities,were critical risk factors contributing to these issues.The development of a model that integrates dynamic screening,full-chain intervention,and collaborative management is beneficial for fostering the efficient and systematic advancement of the rural mental health system.[Conclusions]Patients with mental disorders residing in rural areas face dual vulnerabilities.Therefore,it is essential to implement integrated management that encompasses early screening,standardized treatment,family support,and policy assistance.It is recommended that these elements should be integrated into the framework for local health policy development to enhance equitable access to mental health services and to provide psychological support for rural revitalization efforts.
基金Supported by the National Natural Science Foundation of China,No.82270649.
文摘Transjugular intrahepatic portosystemic shunts(TIPSs)are generally used for the management of complications of portal hypertension in patients with decompensated cirrhosis.However,hepatic encephalopathy(HE),which impairs neuropsychiatric function and motor control,remains the primary adverse effect of TIPS,limiting its utility.Prompt prevention and treatment of post-TIPS HE are critical,as they are strongly associated with readmission rates and poor quality of life.This review focuses on the main pathophysiological mechanisms underlying post-TIPS HE,explores advanced biomarkers and predictive tools,and discusses current management strategies and future directions to prevent or reverse HE following TIPS.These strategies include preoperative patient assessment,individualized shunt diameter optimization,spontaneous portosystemic shunt embolization during the TIPS procedure,postoperative preventive and therapeutic measures such as nutrition management,medical therapy,fecal microbiota transplantation,and stent reduction.
文摘This paper applies conflict management theory to study customer conflicts in budget hotels.Utilizing investigations and data analysis from budget hotels in Guilin,Guangxi Province,China,it identifies the factors that influence the formation of customer conflicts and describes the characteristics of each stage in the development process,as well as the dual role of the conflicts.The paper also presents strategies for managing the transition from non-confrontational to confrontational conflicts.
基金the Fundamental Research Funds of CAF(CAFYBB2022SY020)the National Natural Science Foundation of China(31872645).
文摘Invasive alien species(IAS)significantly threaten global biodiversity and ecosystem stability.Despite increasing management efforts,a critical knowledge gap existed in understanding commonalities and disparities among national strategies.We analyzed several IAS management lists from 23 countries and the European Union,focusing specifically on vascular plant species within these lists.List composition,characteristics,and associated management measures were analyzed.Key patterns in species prioritization across national lists and intercontinental exchange of invasive alien plants(IAPs)were identified.Pistia stratiotes,Pontederia crassipes,Salvinia molesta,Cabomba caroliniana,Ulex europaeus were identified as globally recognized threats,being listed by at least 33.3%of analyzed countries and invading five or more continents.Aquatic plants were found to be more frequently included in management lists.A significant directional invasion pattern between the Eastern and Western Hemispheres was identified.Species native to Asia were observed to dominate as significant donors of IAPs across continents.The analysis of list management strategies highlighted substantial gaps in achieving Target 6 of the Kunming-Montreal Global Biodiversity Framework,particularly in species prioritization and inclusion of potential IAPs.In response to these challenges,a tiered classification system for invasive alien species list was proposed,encompassing High-Priority,Watchlist,Potential,and Priority Site categories,which aimed at enhancing management effectiveness by tailoring strategies to different invasion stages and ecological contexts.This study could contribute to understanding global IAPs management strategies and serve as a reference for policymakers and conservation managers to identify priority IAPs and refine management approaches.
基金Supported by Zhejiang Province Medical and Health Technology Planning Project,No.2019332856.
文摘Gastric retention is a common complication in individuals receiving enteral nutrition(EN)via a nasogastric tube,increasing the risk of aspiration pneumonia and causing unnecessary interruptions in nutritional support.Given its clinical significance,establishing effective,evidence-based,and standardized manage-ment strategies is essential for bettering patient outcomes and mitigating compli-cations.This review systematically synthesized the diagnostic criteria,assessment methods,influencing factors,management procedures,and intervention strategies for gastric retention in EN patients.Although no universal consensus exists re-garding gastric residual volume(GRV)thresholds,evidence indicates that EN can continue at high GRV levels in the absence of gastrointestinal symptoms.Bedside ultrasound emerged as a non-invasive,and precise method GRV assessment,offering potential to standardize clinical practice.Key risk factors for gastric retention include neurological disorders and EN infusion rates exceeding 100 mL/h.Effective management strategies encompass non-pharmacological inter-ventions,pharmacological agents,and traditional Chinese medicine(TCM)the-rapies.This review underscored the need for integrated,multi-modal manage-ment strategies and recommended the adoption of bedside ultrasound and stan-dardized protocols to optimize EN delivery and improve patient outcomes.Large-scale,multicenter clinical trials should be a priority for future investigation to verify the effectiveness of TCM therapies and develop personalized intervention plans for high-risk patients.
文摘Objective:To analyze the application value of prescription management of traditional Chinese medicine formula granules in reducing unreasonable prescriptions.Methods:From January to June 2024,before improving prescription management strategies,118 patients treated with traditional Chinese medicine formula granules were included in the control group.From July to December 2024,after improving prescription management strategies,118 patients treated with traditional Chinese medicine formula granules were included in the observation group.The unqualified prescription rate,incidence of adverse reactions,complaint rate,and satisfaction were compared.Results:The unqualified prescription rate of traditional Chinese medicine formula granules in the observation group was lower than that in the control group(P<0.05);the incidence of adverse reactions and patient complaint rate of traditional Chinese medicine formula granules in the observation group were lower than those in the control group(P<0.05);the satisfaction of traditional Chinese medicine formula granules in the observation group was higher than that in the control group(P<0.05).Conclusion:Improving the prescription management strategy of traditional Chinese medicine formula granules can reduce the unqualified prescription rate and the incidence of adverse drug reactions,reduce patient complaints,and is conducive to improving patient satisfaction.
基金This project is supported by Electric Vehicle Key Project of National 863 Program of China (No.2001AA501200, 2001AA501211).
文摘Energy management strategy (EMS) is the core of the real-time controlalgorithm of the hybrid electric vehicle (HEV). A novel EMS using the logic threshold approach withincorporation of a stand-by optimization algorithm is proposed. The aim of it is to minimize theengine fuel consumption and maintain the battery state of charge (SOC) in its operation range, whilesatisfying the vehicle performance and drivability requirements. The hybrid powertrain bench testis carried out to collect data of the engine, motor and battery pack, which are used in the EMS tocontrol the powertrain. Computer simulation model of the HEV is established in the MATLAB/Simulinkenvironment according to the bench test results. Simulation results are presented for behaviors ofthe engine, motor and battery. The proposed EMS is implemented for a real parallel hybrid carcontrol system and validated by vehicle field tests.
文摘The effects of retarding resistance evolution of mixing and sequencing acaricides were studied based on the resistance selection of three acaricides to Tetranychus cinnabarinus in the laboratory. Tetrany-chus cinnabarinus was continuously selected with fenpropathrin, abamectin and pyridaban for 28, 30 and 31 generations, respectively, and resistance factor increased to 65.6, 7.2 and 1.2 time, accordingly. Results of cross-resistance determination suggested that there were no cross-resistance existed among the three acaricides. Analysis of resistance selection and estimation of realized heritability (h2) of resistance to three single and two mixed acaricides showed that a mixture of fenpropathrin+abamectin would slow resistance development compared with a sequence of fenpropathrin followed by abamectin while the mixture of pyridaben+abamectin and the sequence of pyridaben followed by abamectin would effectively retard resistance evolution.
基金financially supported by the Support Plan for Overseas Students to Return to China for Entrepreneurship and Innovation(cx2020003)the Fundamental Research Funds for the Central Universities(2020CDJ-LHZZ-074)the Natural Science Foundation of Chongqing(cstc2020jcyj-msxm X0629)。
文摘The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination losses.Poor buried interfacial contact is detrimental to charge extraction and device stability.Here,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up modification.The synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,respectively.Through TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved stability.With post-treatment,the efficiency is further improved to 23.63%.
