With the explosive growth of variable renewable energy,the balance between the supply and demand of the power grid is faced with new challenges.Based on the development experience from typical countries and the state ...With the explosive growth of variable renewable energy,the balance between the supply and demand of the power grid is faced with new challenges.Based on the development experience from typical countries and the state quo in China,this paper further analyzes the system architecture and development trend of demand response under the background of Energy Internet.Five dimensions are considered:Energy Internet platform,demand response application scenarios,system architecture,information technology system construction,and demand response development trend.The results show that the application of the Energy Internet platform can effectively solve the problems of data acquisition and processing,“terminal-edge-network-cloud”cooperation of demand response,etc.The system architecture of the demand response platform that supports user resource management,user information access,control instruction receiving,control strategy issuing,and response process monitoring is proposed in this paper.It is also helpful to provide a feasible technical choice for expanding the application services of Energy Internet towards government and society.展开更多
This paper examines the mutual displacement of functional elements （FE） of risky technical systems （RTS）. To this group of systems belong transport systems, technical systems operating in heavy regimes, energy and...This paper examines the mutual displacement of functional elements （FE） of risky technical systems （RTS）. To this group of systems belong transport systems, technical systems operating in heavy regimes, energy and power systems, building structures. etc. A unit of mutual displacement of the functional elements of RTS is introduced, as well as a definition of the deformator of the system. The value of the deformator of a sample system is determined.展开更多
There are two phases in the development of China's high-speed railway after the1990s:the research and experiment phase during the Eighth and the Tenth Five-Year Plan periods;the construction and operation phase du...There are two phases in the development of China's high-speed railway after the1990s:the research and experiment phase during the Eighth and the Tenth Five-Year Plan periods;the construction and operation phase during the Eleventh and the Thirteenth Five-Year Plan periods.This paper regards the Beijing-Shanghai High-Speed Railway as the corner stone in the development of high-speed railway subgrade system,and proposes suggestions and solutions to the problems which may reduce the service life of subgrade.These solutions and methods can be referred to in future railway projects.展开更多
Elevation is one of many components that influence agriculture, and this in turn affects the level of both inputs and outputs of farmers. This article focuses on the productivity and technical efficiency of 100 cocoa ...Elevation is one of many components that influence agriculture, and this in turn affects the level of both inputs and outputs of farmers. This article focuses on the productivity and technical efficiency of 100 cocoa farms using cross-sectional data from areas ranging from 190 to 1021 m above sea level which were classified as low, medium, and high elevation in Davao City, considered as the chocolate capital of the Philippines. Using stochastic frontier analysis, the results showed that the cost of inputs per ha and the number of cocoa trees per ha significantly increase yield. Farms at high elevations were less technically efficient, as this entails lower temperatures and increased rainfall, and cocoa farming in those areas and conditions can be more challenging, especially with changes in farming practices, terrain, and distance to markets. Other significant variables were age of cocoa farms, married farmers, and age of the farmers. Older farms may be more developed, farmers who are married benefit from their spouses being able to readily contribute as farm labor, and lastly, older farmers' inefficiency may likely stem from nonadaptation of newer farming practices. With an average technical efficiency of 0.61, 0.63, and 0.26 in low, medium, and high elevation areas, respectively, farmers therefore have an incentive to improve farm practices and consider topographical variations found in high elevation areas. Recommendations for the improvement of technical efficiency of cocoa farms are better connectivity to markets, enhancing farm practices, and continuation and improvement of government programs on cocoa with an added emphasis on research. For farmers in high elevation areas, mitigating solutions such as sustainable agriculture practices and ecolabelling are key to improving efficiency and minimizing the potential negative impact on upland farming systems. Moreover, such adaptation measures may also contribute to sustainability of cocoa farming in high elevation areas.展开更多
Background: Technical skills play an integral part in perioperative nurse work in preventing adverse outcome in operating rooms (OR). Pervasive critical shortage of skills and evolution of technologies has pushed for ...Background: Technical skills play an integral part in perioperative nurse work in preventing adverse outcome in operating rooms (OR). Pervasive critical shortage of skills and evolution of technologies has pushed for integration of different approaches to training to address the deficit in technical skills. Objective: The aim is to investigate the impact of training in technical skills on operating theatre nurses’ clinical competence and describe important factors of clinical competence for operating theatre nurses (OTNs). Method: We used systematic review of the evidences on the best practice in design and delivery of training for operating theatre nurses. The review systematically searched for six relevant articles in PubMed, CINAHL and Embase using keywords and mesh terms for studies on training of perioperative nurses in December 2024. We extracted information on training and the impact of training on participant’s technical skills. Results: The systematic review screened 518 sources from the three identified databases where six peer-reviewed sources met the inclusion criteria developed by the authors and were included for analysis. The authors used the Cochrane Risk of Bias tool to assess the level of empirical evidence based on five domains of bias. Finding: Our findings demonstrate that simulation and technology-based approaches significantly improve nurses’ technical skills and confidence. Conclusion: The review underscores the importance of structured and technology-driven training programs in enhancing operating room (OR) nurses’ technical skills. The lack of standardized training approaches and limited research on long-term outcome indicates a need for further studies to optimize training designs and delivery methods for operating room nurses.展开更多
Sea launch has the characteristics of flexible launching points, high landing area safety, and good economy. In recent years, it has become one of the important launch methods. Since 2019, China has carried out a tota...Sea launch has the characteristics of flexible launching points, high landing area safety, and good economy. In recent years, it has become one of the important launch methods. Since 2019, China has carried out a total of 11 successful sea launches. The Gravity-1(YL-1) sea launch system consists of a launch vehicle system and a sea launch platform. The sea launch program includes roll on/roll off boarding, sea mooring, sea maneuvering, anchoring and positioning, system testing, and formal launch. Through the maiden flight of YL-1, the design and manufacturing technology of large tonnage dedicated launch ship, launch vehicle vertical transfer and roll on/roll off boarding technology, anti-shake technology for sea launch, simple inflatable flexible insulation protective cover technology, and remote wireless measurement and control technology have been fully verified.展开更多
Uzbekistan Institute of Standards(UIS),founded in 1969,is the national standardization body of Uzbekistan.There are over 32,000 national standards in Uzbekistan.Last year,UIS revised the working regulations of all tec...Uzbekistan Institute of Standards(UIS),founded in 1969,is the national standardization body of Uzbekistan.There are over 32,000 national standards in Uzbekistan.Last year,UIS revised the working regulations of all technical committees,which were established in accordance with the organizational structure of ISO.At present,UIS has standardization training courses covering 54 directions,and more than 1,700 experts have received relevant training.UIS ranks the 95th in terms of the Quality Infrastructure for Sustainable Development(QI4SD)and 80th in terms of the Global Quality Infrastructure Index(GQII).It is a member of ISO and an associate member of IEC.In the UIS,40 experts have participated in the activities of various ISO technical committees,and 251 experts have participated in the discussion of IEC projects as observer members.展开更多
The full potential of advanced coating and finishingtechnologies for the production of technical textiles willbe outlined by Monforts specialists at Techtextil NorthAmerica which takes place in Atlanta,Georgia,from Ma...The full potential of advanced coating and finishingtechnologies for the production of technical textiles willbe outlined by Monforts specialists at Techtextil NorthAmerica which takes place in Atlanta,Georgia,from May6-8.The company and its US representative PSP Market-ing,of Charlotte,North Carolina,will be part of the exten-sive VDMA German Pavilion at the show,at stand 323lwithin the Georgia World Congress Center.展开更多
This study provides a systematic investigation into the influence of feature selection methods on cryptocurrency price forecasting models employing technical indicators.In this work,over 130 technical indicators—cove...This study provides a systematic investigation into the influence of feature selection methods on cryptocurrency price forecasting models employing technical indicators.In this work,over 130 technical indicators—covering momentum,volatility,volume,and trend-related technical indicators—are subjected to three distinct feature selection approaches.Specifically,mutual information(MI),recursive feature elimination(RFE),and random forest importance(RFI).By extracting an optimal set of 20 predictors,the proposed framework aims to mitigate redundancy and overfitting while enhancing interpretability.These feature subsets are integrated into support vector regression(SVR),Huber regressors,and k-nearest neighbors(KNN)models to forecast the prices of three leading cryptocurrencies—Bitcoin(BTC/USDT),Ethereum(ETH/USDT),and Binance Coin(BNB/USDT)—across horizons ranging from 1 to 20 days.Model evaluation employs the coefficient of determination(R2)and the root mean squared logarithmic error(RMSLE),alongside a walk-forward validation scheme to approximate real-world trading contexts.Empirical results indicate that incorporating momentum and volatility measures substantially improves predictive accuracy,with particularly pronounced effects observed at longer forecast windows.Moreover,indicators related to volume and trend provide incremental benefits in select market conditions.Notably,an 80%–85% reduction in the original feature set frequently maintains or enhances model performance relative to the complete indicator set.These findings highlight the critical role of targeted feature selection in addressing high-dimensional financial data challenges while preserving model robustness.This research advances the field of cryptocurrency forecasting by offering a rigorous comparison of feature selection methods and their effects on multiple digital assets and prediction horizons.The outcomes highlight the importance of dimension-reduction strategies in developing more efficient and resilient forecasting algorithms.Future efforts should incorporate high-frequency data and explore alternative selection techniques to further refine predictive accuracy in this highly volatile domain.展开更多
Addressing issues such as the disconnect between theory and practice and low student engagement in control system education,this paper uses the course“The Working Process of Open-Loop Control Systems”as a case study...Addressing issues such as the disconnect between theory and practice and low student engagement in control system education,this paper uses the course“The Working Process of Open-Loop Control Systems”as a case study to explore the integration of AI technology with the“project-guided and task-driven”teaching model.By constructing a four-dimensional teaching framework of“situation-task-activity-evaluation,”AI tools are embedded in project practices such as the construction of a mechanical timed flower watering device and the optimization of a digital timed flower watering device,achieving precision,interactivity,and personalization in the teaching process.Teaching practice demonstrates that this model significantly enhances students’technical awareness,materialization capabilities,and engineering thinking,providing a reference for the teaching reform of technical courses in high school education.展开更多
Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron&Steel Co.,Ltd.Baosteel Technical Research mainly reports the achievements in technologic...Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron&Steel Co.,Ltd.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company's technological development and progress.展开更多
Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron & Steel Co.,Ltd.. Baosteel Technical Research mainly reports the achievements in technol...Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron & Steel Co.,Ltd.. Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel. It will continue to follow up on hot topics and serve the company's technological development and progress. Its readers include experts in steel metallurgy and related fields,technicians,management staff,professors and students in universities and colleges.展开更多
This paper summarized the technical regulations for protected production of netted melon in Yantai City,primarily including technical measures such as the environmental requirements of the production area,cultivation ...This paper summarized the technical regulations for protected production of netted melon in Yantai City,primarily including technical measures such as the environmental requirements of the production area,cultivation techniques,pest and disease control,harvesting,packaging,storage,waste management,and production records for netted melon grown in facilities.The technical regulations aim to standardize the protected production of netted melon and enhance the level of standardized and normative production technology.展开更多
This paper comprehensively explores the technical principles and application practice of Sainaoning absorbable dural sealant medical adhesive in dural closure.It elaborates on the research and development background o...This paper comprehensively explores the technical principles and application practice of Sainaoning absorbable dural sealant medical adhesive in dural closure.It elaborates on the research and development background of Sainaoning,analyzes its composition,action mechanism,and product characteristics in detail,and presents the results of pre-clinical and clinical studies.The application of Sainaoning in different craniotomy surgeries is discussed,and its effectiveness and safety are evaluated.The paper also analyzes the challenges in its application and proposes corresponding countermeasures,aiming to provide a comprehensive understanding and reference for the clinical use and further development of Sainaoning.展开更多
Term is a kind of limited language symbols,usually presented in a specific language or text and used to communicate and express ideas.With the globalization of economy,international trade has become more frequent,and ...Term is a kind of limited language symbols,usually presented in a specific language or text and used to communicate and express ideas.With the globalization of economy,international trade has become more frequent,and chemical products have gradually become the hotspot of international import and export transactions,so the Chinese translation of the names of chemical products has become more important,and accurate translation can better promote the development of the domestic chemical industry and its dialogue and exchange with the international chemical industry.In this paper,we first explore the Chinese translation strategies of the semi-technical words in chemistry,and then investigate the translation strategies for technical words,subdividing the technical words into compounds,derivatives,and acronyms,with a view to providing ideas and references for translations of relevant texts.展开更多
1.Opportunities for electric motor drives in the low-altitude economy The implementation plan for the innovative application of general aviation equipment(2024–2030)outlines that by 2027,new general aviation equipmen...1.Opportunities for electric motor drives in the low-altitude economy The implementation plan for the innovative application of general aviation equipment(2024–2030)outlines that by 2027,new general aviation equipment will achieve commercial applications in urban air transport,logistics distribution and emergency rescue.展开更多
In chemical flooding,emulsification and interfacial tension(IFT)reduction are crucial for enhanced oil recovery(EOR).However,the dominant performance parameter and technical limits of surfactants for oil displacement ...In chemical flooding,emulsification and interfacial tension(IFT)reduction are crucial for enhanced oil recovery(EOR).However,the dominant performance parameter and technical limits of surfactants for oil displacement remain underexplored.This study investigated the relationship between the emulsification capability and IFT.Accordingly,the dominant performance parameter and the technical limits of surfactants were determined using oil displacement experiments.Specifically,an analysis of 74 sets of experimental results revealed a shift in the significant correlation between EI(a quantitative measure of emulsification capability)andσat anσvalue of 8.5×10^(-2)mN/m(i.e.,critical valueσ_(c)).Forσ<σ_(c),emulsification capability and IFT function as independent performance parameters.The oil displacement experiments using two surfactants with contrasting EI andσvalues demonstrate that emulsification capability,rather than ultra-low IFT,is the dominant performance parameter.This study determined the technical limit of EI using oil displacement experiments via in-situ emulsification.The experimental results indicate strong correlations of EI with oil displacement and recovery efficiencies.The incremental displacement and recovery efficiencies were employed to quantify the potential of surfactants to enhance oil displacement and recovery efficiencies,respectively.The incremental displacement and recovery efficiencies versus EI curves revealed a critical EI(EI_(c))value of 0.53.When EIEI_(c),their increasing rates slowed down markedly.Therefore,the technical limits of the emulsification capability and IFT of surfactants used in this study are determined at EI≥0.53 andσ≤8.5×10^(-2)mN/m,respectively.展开更多
As global trade networks deepen and trade patterns evolve,supply chain dynamics have emerged as a critical driver of high-quality development-particularly as reflected in firms’capacity to export higher-quality produ...As global trade networks deepen and trade patterns evolve,supply chain dynamics have emerged as a critical driver of high-quality development-particularly as reflected in firms’capacity to export higher-quality products.Drawing on new-new trade theory,this study incorporates supply chain behavior-specifically,the use of intermediate goods-into the analytical framework for determining export product quality.Theoretically,it posits that technical regulations on the supply chain influence export quality through two key channels:improvements in the quality of intermediate inputs and changes in their associated costs.Empirically,the study exploits China’s imposition of technical barriers to trade(TBT)on intermediate goods imports as a quasi-natural experiment,applying a difference-in-differences approach to firm-level export data from 2000 to 2014.The results show that supply chain technical regulations lead to significant improvements in the quality of exported final products.Mechanistically,the regulations raise the quality of imported intermediates,which in turn drive upgrades in final outputs,while leaving import costs largely unchanged-since compliance expenses are absorbed by foreign exporters rather than passed on to Chinese firms.Further analysis reveals substantial heterogeneity in these effects,depending on both the type of regulation and firm characteristics.These variations reflect differences in regulatory intensity and in firms’sensitivity to supply chain changes,adaptability,and capacity to convert input quality into product upgrades.Overall,the findings suggest that strengthening supply-side regulatory standards-when properly designed-represents a strategic lever for improving product quality and enhancing firms’international competitiveness,offering valuable insights for trade policy and global supply chain governance.展开更多
The internationalization of technical standards is a crucial means to promote high-quality economic development,enhance corporate competitiveness,and participate in global economic governance.Drawing widespread academ...The internationalization of technical standards is a crucial means to promote high-quality economic development,enhance corporate competitiveness,and participate in global economic governance.Drawing widespread academic attention,this paper systematically reviews existing research on the internationalization of technical standards,covering aspects such as the concept of technical internationalization,challenges and countermeasures,influencing factors,and the relationship between technological innovation and technical standards.The aim is to advance the refinement of related technical fields and provide theoretical support and guidance for practical activities in the internationalization of technical standards.展开更多
In the process of building a new power system dominated by new energy sources,power storage is a key supporting technology that ensures the safe and stable operation of the power grid,enables the flexible regulation o...In the process of building a new power system dominated by new energy sources,power storage is a key supporting technology that ensures the safe and stable operation of the power grid,enables the flexible regulation of the system,and raises the level of new energy consumption.It is also key to achieving carbon peak and neutrality as well as energy transformation.展开更多
基金supported by the Fundamental Research Funds for the Central Universities(2019QN066).
文摘With the explosive growth of variable renewable energy,the balance between the supply and demand of the power grid is faced with new challenges.Based on the development experience from typical countries and the state quo in China,this paper further analyzes the system architecture and development trend of demand response under the background of Energy Internet.Five dimensions are considered:Energy Internet platform,demand response application scenarios,system architecture,information technology system construction,and demand response development trend.The results show that the application of the Energy Internet platform can effectively solve the problems of data acquisition and processing,“terminal-edge-network-cloud”cooperation of demand response,etc.The system architecture of the demand response platform that supports user resource management,user information access,control instruction receiving,control strategy issuing,and response process monitoring is proposed in this paper.It is also helpful to provide a feasible technical choice for expanding the application services of Energy Internet towards government and society.
文摘This paper examines the mutual displacement of functional elements （FE） of risky technical systems （RTS）. To this group of systems belong transport systems, technical systems operating in heavy regimes, energy and power systems, building structures. etc. A unit of mutual displacement of the functional elements of RTS is introduced, as well as a definition of the deformator of the system. The value of the deformator of a sample system is determined.
文摘There are two phases in the development of China's high-speed railway after the1990s:the research and experiment phase during the Eighth and the Tenth Five-Year Plan periods;the construction and operation phase during the Eleventh and the Thirteenth Five-Year Plan periods.This paper regards the Beijing-Shanghai High-Speed Railway as the corner stone in the development of high-speed railway subgrade system,and proposes suggestions and solutions to the problems which may reduce the service life of subgrade.These solutions and methods can be referred to in future railway projects.
文摘Elevation is one of many components that influence agriculture, and this in turn affects the level of both inputs and outputs of farmers. This article focuses on the productivity and technical efficiency of 100 cocoa farms using cross-sectional data from areas ranging from 190 to 1021 m above sea level which were classified as low, medium, and high elevation in Davao City, considered as the chocolate capital of the Philippines. Using stochastic frontier analysis, the results showed that the cost of inputs per ha and the number of cocoa trees per ha significantly increase yield. Farms at high elevations were less technically efficient, as this entails lower temperatures and increased rainfall, and cocoa farming in those areas and conditions can be more challenging, especially with changes in farming practices, terrain, and distance to markets. Other significant variables were age of cocoa farms, married farmers, and age of the farmers. Older farms may be more developed, farmers who are married benefit from their spouses being able to readily contribute as farm labor, and lastly, older farmers' inefficiency may likely stem from nonadaptation of newer farming practices. With an average technical efficiency of 0.61, 0.63, and 0.26 in low, medium, and high elevation areas, respectively, farmers therefore have an incentive to improve farm practices and consider topographical variations found in high elevation areas. Recommendations for the improvement of technical efficiency of cocoa farms are better connectivity to markets, enhancing farm practices, and continuation and improvement of government programs on cocoa with an added emphasis on research. For farmers in high elevation areas, mitigating solutions such as sustainable agriculture practices and ecolabelling are key to improving efficiency and minimizing the potential negative impact on upland farming systems. Moreover, such adaptation measures may also contribute to sustainability of cocoa farming in high elevation areas.
文摘Background: Technical skills play an integral part in perioperative nurse work in preventing adverse outcome in operating rooms (OR). Pervasive critical shortage of skills and evolution of technologies has pushed for integration of different approaches to training to address the deficit in technical skills. Objective: The aim is to investigate the impact of training in technical skills on operating theatre nurses’ clinical competence and describe important factors of clinical competence for operating theatre nurses (OTNs). Method: We used systematic review of the evidences on the best practice in design and delivery of training for operating theatre nurses. The review systematically searched for six relevant articles in PubMed, CINAHL and Embase using keywords and mesh terms for studies on training of perioperative nurses in December 2024. We extracted information on training and the impact of training on participant’s technical skills. Results: The systematic review screened 518 sources from the three identified databases where six peer-reviewed sources met the inclusion criteria developed by the authors and were included for analysis. The authors used the Cochrane Risk of Bias tool to assess the level of empirical evidence based on five domains of bias. Finding: Our findings demonstrate that simulation and technology-based approaches significantly improve nurses’ technical skills and confidence. Conclusion: The review underscores the importance of structured and technology-driven training programs in enhancing operating room (OR) nurses’ technical skills. The lack of standardized training approaches and limited research on long-term outcome indicates a need for further studies to optimize training designs and delivery methods for operating room nurses.
文摘Sea launch has the characteristics of flexible launching points, high landing area safety, and good economy. In recent years, it has become one of the important launch methods. Since 2019, China has carried out a total of 11 successful sea launches. The Gravity-1(YL-1) sea launch system consists of a launch vehicle system and a sea launch platform. The sea launch program includes roll on/roll off boarding, sea mooring, sea maneuvering, anchoring and positioning, system testing, and formal launch. Through the maiden flight of YL-1, the design and manufacturing technology of large tonnage dedicated launch ship, launch vehicle vertical transfer and roll on/roll off boarding technology, anti-shake technology for sea launch, simple inflatable flexible insulation protective cover technology, and remote wireless measurement and control technology have been fully verified.
文摘Uzbekistan Institute of Standards(UIS),founded in 1969,is the national standardization body of Uzbekistan.There are over 32,000 national standards in Uzbekistan.Last year,UIS revised the working regulations of all technical committees,which were established in accordance with the organizational structure of ISO.At present,UIS has standardization training courses covering 54 directions,and more than 1,700 experts have received relevant training.UIS ranks the 95th in terms of the Quality Infrastructure for Sustainable Development(QI4SD)and 80th in terms of the Global Quality Infrastructure Index(GQII).It is a member of ISO and an associate member of IEC.In the UIS,40 experts have participated in the activities of various ISO technical committees,and 251 experts have participated in the discussion of IEC projects as observer members.
文摘The full potential of advanced coating and finishingtechnologies for the production of technical textiles willbe outlined by Monforts specialists at Techtextil NorthAmerica which takes place in Atlanta,Georgia,from May6-8.The company and its US representative PSP Market-ing,of Charlotte,North Carolina,will be part of the exten-sive VDMA German Pavilion at the show,at stand 323lwithin the Georgia World Congress Center.
文摘This study provides a systematic investigation into the influence of feature selection methods on cryptocurrency price forecasting models employing technical indicators.In this work,over 130 technical indicators—covering momentum,volatility,volume,and trend-related technical indicators—are subjected to three distinct feature selection approaches.Specifically,mutual information(MI),recursive feature elimination(RFE),and random forest importance(RFI).By extracting an optimal set of 20 predictors,the proposed framework aims to mitigate redundancy and overfitting while enhancing interpretability.These feature subsets are integrated into support vector regression(SVR),Huber regressors,and k-nearest neighbors(KNN)models to forecast the prices of three leading cryptocurrencies—Bitcoin(BTC/USDT),Ethereum(ETH/USDT),and Binance Coin(BNB/USDT)—across horizons ranging from 1 to 20 days.Model evaluation employs the coefficient of determination(R2)and the root mean squared logarithmic error(RMSLE),alongside a walk-forward validation scheme to approximate real-world trading contexts.Empirical results indicate that incorporating momentum and volatility measures substantially improves predictive accuracy,with particularly pronounced effects observed at longer forecast windows.Moreover,indicators related to volume and trend provide incremental benefits in select market conditions.Notably,an 80%–85% reduction in the original feature set frequently maintains or enhances model performance relative to the complete indicator set.These findings highlight the critical role of targeted feature selection in addressing high-dimensional financial data challenges while preserving model robustness.This research advances the field of cryptocurrency forecasting by offering a rigorous comparison of feature selection methods and their effects on multiple digital assets and prediction horizons.The outcomes highlight the importance of dimension-reduction strategies in developing more efficient and resilient forecasting algorithms.Future efforts should incorporate high-frequency data and explore alternative selection techniques to further refine predictive accuracy in this highly volatile domain.
文摘Addressing issues such as the disconnect between theory and practice and low student engagement in control system education,this paper uses the course“The Working Process of Open-Loop Control Systems”as a case study to explore the integration of AI technology with the“project-guided and task-driven”teaching model.By constructing a four-dimensional teaching framework of“situation-task-activity-evaluation,”AI tools are embedded in project practices such as the construction of a mechanical timed flower watering device and the optimization of a digital timed flower watering device,achieving precision,interactivity,and personalization in the teaching process.Teaching practice demonstrates that this model significantly enhances students’technical awareness,materialization capabilities,and engineering thinking,providing a reference for the teaching reform of technical courses in high school education.
文摘Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron&Steel Co.,Ltd.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company's technological development and progress.
文摘Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baoshan Iron & Steel Co.,Ltd.. Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel. It will continue to follow up on hot topics and serve the company's technological development and progress. Its readers include experts in steel metallurgy and related fields,technicians,management staff,professors and students in universities and colleges.
基金Supported by The Teaching Reform Research Project of Yantai Institute of China Agricultural University(202302Ks)Yantai Local Standard Revision Program(DB 3706/T 73-2021).
文摘This paper summarized the technical regulations for protected production of netted melon in Yantai City,primarily including technical measures such as the environmental requirements of the production area,cultivation techniques,pest and disease control,harvesting,packaging,storage,waste management,and production records for netted melon grown in facilities.The technical regulations aim to standardize the protected production of netted melon and enhance the level of standardized and normative production technology.
文摘This paper comprehensively explores the technical principles and application practice of Sainaoning absorbable dural sealant medical adhesive in dural closure.It elaborates on the research and development background of Sainaoning,analyzes its composition,action mechanism,and product characteristics in detail,and presents the results of pre-clinical and clinical studies.The application of Sainaoning in different craniotomy surgeries is discussed,and its effectiveness and safety are evaluated.The paper also analyzes the challenges in its application and proposes corresponding countermeasures,aiming to provide a comprehensive understanding and reference for the clinical use and further development of Sainaoning.
基金USST Construction Project of English-Taught Courses for International Students in 2024USST Teaching Achievement Award(Postgraduate)Cultivation Project in 2024.
文摘Term is a kind of limited language symbols,usually presented in a specific language or text and used to communicate and express ideas.With the globalization of economy,international trade has become more frequent,and chemical products have gradually become the hotspot of international import and export transactions,so the Chinese translation of the names of chemical products has become more important,and accurate translation can better promote the development of the domestic chemical industry and its dialogue and exchange with the international chemical industry.In this paper,we first explore the Chinese translation strategies of the semi-technical words in chemistry,and then investigate the translation strategies for technical words,subdividing the technical words into compounds,derivatives,and acronyms,with a view to providing ideas and references for translations of relevant texts.
基金supported by the National Natural Science Foundation of China(No.52407064)。
文摘1.Opportunities for electric motor drives in the low-altitude economy The implementation plan for the innovative application of general aviation equipment(2024–2030)outlines that by 2027,new general aviation equipment will achieve commercial applications in urban air transport,logistics distribution and emergency rescue.
基金funded by a basic research project of SINOPEC(KL22023)。
文摘In chemical flooding,emulsification and interfacial tension(IFT)reduction are crucial for enhanced oil recovery(EOR).However,the dominant performance parameter and technical limits of surfactants for oil displacement remain underexplored.This study investigated the relationship between the emulsification capability and IFT.Accordingly,the dominant performance parameter and the technical limits of surfactants were determined using oil displacement experiments.Specifically,an analysis of 74 sets of experimental results revealed a shift in the significant correlation between EI(a quantitative measure of emulsification capability)andσat anσvalue of 8.5×10^(-2)mN/m(i.e.,critical valueσ_(c)).Forσ<σ_(c),emulsification capability and IFT function as independent performance parameters.The oil displacement experiments using two surfactants with contrasting EI andσvalues demonstrate that emulsification capability,rather than ultra-low IFT,is the dominant performance parameter.This study determined the technical limit of EI using oil displacement experiments via in-situ emulsification.The experimental results indicate strong correlations of EI with oil displacement and recovery efficiencies.The incremental displacement and recovery efficiencies were employed to quantify the potential of surfactants to enhance oil displacement and recovery efficiencies,respectively.The incremental displacement and recovery efficiencies versus EI curves revealed a critical EI(EI_(c))value of 0.53.When EIEI_(c),their increasing rates slowed down markedly.Therefore,the technical limits of the emulsification capability and IFT of surfactants used in this study are determined at EI≥0.53 andσ≤8.5×10^(-2)mN/m,respectively.
基金supported by a major project from the Key Research Base of Humanities and Social Sciences of the Ministry of Education,“Research on Open Development and High-Quality Integrated Development of the Yangtze River Delta Region”(Grant No.22JJD790035).
文摘As global trade networks deepen and trade patterns evolve,supply chain dynamics have emerged as a critical driver of high-quality development-particularly as reflected in firms’capacity to export higher-quality products.Drawing on new-new trade theory,this study incorporates supply chain behavior-specifically,the use of intermediate goods-into the analytical framework for determining export product quality.Theoretically,it posits that technical regulations on the supply chain influence export quality through two key channels:improvements in the quality of intermediate inputs and changes in their associated costs.Empirically,the study exploits China’s imposition of technical barriers to trade(TBT)on intermediate goods imports as a quasi-natural experiment,applying a difference-in-differences approach to firm-level export data from 2000 to 2014.The results show that supply chain technical regulations lead to significant improvements in the quality of exported final products.Mechanistically,the regulations raise the quality of imported intermediates,which in turn drive upgrades in final outputs,while leaving import costs largely unchanged-since compliance expenses are absorbed by foreign exporters rather than passed on to Chinese firms.Further analysis reveals substantial heterogeneity in these effects,depending on both the type of regulation and firm characteristics.These variations reflect differences in regulatory intensity and in firms’sensitivity to supply chain changes,adaptability,and capacity to convert input quality into product upgrades.Overall,the findings suggest that strengthening supply-side regulatory standards-when properly designed-represents a strategic lever for improving product quality and enhancing firms’international competitiveness,offering valuable insights for trade policy and global supply chain governance.
文摘The internationalization of technical standards is a crucial means to promote high-quality economic development,enhance corporate competitiveness,and participate in global economic governance.Drawing widespread academic attention,this paper systematically reviews existing research on the internationalization of technical standards,covering aspects such as the concept of technical internationalization,challenges and countermeasures,influencing factors,and the relationship between technological innovation and technical standards.The aim is to advance the refinement of related technical fields and provide theoretical support and guidance for practical activities in the internationalization of technical standards.
文摘In the process of building a new power system dominated by new energy sources,power storage is a key supporting technology that ensures the safe and stable operation of the power grid,enables the flexible regulation of the system,and raises the level of new energy consumption.It is also key to achieving carbon peak and neutrality as well as energy transformation.
