Objective:To explore the clinical correlation between the detection of irregular antibodies in red blood cell blood groups and hemolytic disease of the newborn.Methods:This study selected newborns who underwent examin...Objective:To explore the clinical correlation between the detection of irregular antibodies in red blood cell blood groups and hemolytic disease of the newborn.Methods:This study selected newborns who underwent examinations and were diagnosed with hemolytic disease at our hospital from October 2024 to October 2025 as the research subjects.Based on the severity of their hemolytic disease,the infants were divided into a severe group and a mild group.All the infants underwent detection for irregular antibodies in their red blood cell blood groups.General information,blood types,and irregular antibody test results of the two groups were recorded.Univariate analysis was conducted,and variables with statistical significance from the univariate analysis were included in a multivariate logistic regression analysis to explore the clinical correlation between the detection of irregular antibodies in red blood cell blood groups and hemolytic disease of the newborn.Results:Through univariate analysis,it was found that IgG1 and IgG3 subclass antibodies,as well as ABO blood group incompatibility,were statistically significant(p<0.05).When these factors were included in a multivariate logistic regression analysis,it was discovered that IgG1(OR=2.461,95%CI:1.859-2.709),IgG3(OR=2.509,95%CI:1.918-2.893),and ABO blood group incompatibility(OR=2.998,95%CI:2.149-3.493)all exhibited a positive correlation with hemolytic disease of the newborn.Conclusion:As levels of IgG1,IgG3,and ABO blood group incompatibility increase,the incidence of hemolytic disease of the newborn also rises,warranting clinical attention.展开更多
With the rapid development of technology,the application of artificial intelligence in the field of education is becoming increasingly widespread.As a core course of the human resource management major,“Personnel Rec...With the rapid development of technology,the application of artificial intelligence in the field of education is becoming increasingly widespread.As a core course of the human resource management major,“Personnel Recruitment and Evaluation”has a strong practical characteristic,making case teaching a key link.In this context,the importance of artificial intelligence to the case teaching of this course has become more prominent.This paper uses the literature research method and case analysis method to deeply explore the effective mode of artificial intelligence,enabling the case teaching of“Personnel Recruitment and Evaluation.”The research finds that artificial intelligence plays an important role in case screening and updating,in-depth analysis,and the construction of virtual simulation scenarios.However,its application also faces problems such as high technical costs,insufficient technical abilities of teachers,and data security and privacy.In response to these challenges,this paper proposes countermeasures such as reasonable planning of technology investment,strengthening teacher training,and improving the data security management mechanism.展开更多
Continuous exploration of high-temperature structural materials is being driven by the needs of gasturbine engines capable of withstanding the high-temperature environment.Relatively low melting points of currently ap...Continuous exploration of high-temperature structural materials is being driven by the needs of gasturbine engines capable of withstanding the high-temperature environment.Relatively low melting points of currently applied superalloys restrain the further improvement of service tempe ratures.With higher melting tempe ratures above 2000℃,Mo-Si-B alloys are regarded as a new generation of ultrahightemperature structural materials.However,oxidation is a concern for the industrial application of Mo-Si-B alloys.Therefore,an in-depth understanding of the oxidation mechanisms may contribute to solving this issue,whereas relevant reviews about their recent advances are lacking.In the current work,a comprehensively systematic review about the oxidation behaviors of Mo-Si-B alloys is described for this purpose.展开更多
Industrial development is an essential foundation of the national economy,but the industry is also the largest source of air pollution,of which power plants,iron and steel,building materials,and other industries emit ...Industrial development is an essential foundation of the national economy,but the industry is also the largest source of air pollution,of which power plants,iron and steel,building materials,and other industries emit large amounts of pollutants.Therefore,the Chinese government has promulgated a series of stringent emission regulations,and it is against this backdrop that research into air pollution control technologies for key industrial sectors is in full swing.In particular,during the 13th Five-Year Plan,breakthroughs have been made in pollution control technology for key industrial sectors.A multi-pollutant treatment technology system of desulfurization,denitrification,and dust collection,which applies to key industries such as power plants,steel,and building materials,has been developed.High-performance materials for the treatment of different pollutants,such as denitrification catalysts and desulfurization absorbers,were developed.At the same time,multi-pollutant synergistic removal technologies for flue gas in various industries have also become a hot research topic,with important breakthroughs in the synergistic removal of NO_(x),SO_(x),and Hg.Due to the increasingly stringent emission standards and regulations in China,there is still a need to work on the development of multi-pollutant synergistic technologies and further research and development of synergistic abatement technologies for CO_(2) to meet the requirements of ultra-low emissions in industrial sectors.展开更多
Glycogen accumulating organisms(GAOs) are closely related to the deterioration of enhanced biological phosphorus removal systems. However, the metabolic mechanisms that drive GAOs remain unclear. Here, the two-thirds ...Glycogen accumulating organisms(GAOs) are closely related to the deterioration of enhanced biological phosphorus removal systems. However, the metabolic mechanisms that drive GAOs remain unclear. Here, the two-thirds supernatant of a reactor were decanted following the anaerobic period to enrich GAOs. Long-term monitoring demonstrated that the system was stable and exhibited typical characteristics of GAOs metabolism. Acetate was completely consumed after 60 min of the anaerobic phase. The level of glycogen decreased from 0.20 to 0.14 g/gSS during the anaerobic phase, whereas the level of glycogen significantly increased to 0.21g/gSS at the end of the aerobic period. Moreover, there was almost no phosphate release and absorption in the complete periods, thus confirming the successful construction of a GAOs enrichment system. Microbial community analysis demonstrated that Ca. Contendobacter was among the core functional genera and showed the highest activity among all of the communities. Furthermore, our study is the first to identify the involvement of the ethyl-malonyl-CoA pathway in the synthesis of polyhydroxyvalerate via croR, ccr, ecm, mcd, mch and mcl genes. The Embden-Meyerhof-Parnas(EMP) pathway was preferentially used via glgP. Furthermore, the glyoxylate cycle was the main source of ATP under anaerobic conditions, whereas the tricarboxylic acid cycle provided ATP under aerobic conditions. aceA and mdh appeared to be major modulators of the glyoxylate pathway for controlling energy flow. Collectively, our findings not only revealed the crucial metabolic mechanisms in a GAOs enrichment system but also provided insights into the potential application of Ca. Contendobacter for wastewater treatment.展开更多
Modular Solar-Powered Aircraft(M-SPA)is a kind of High-Altitude Long-Endurance(HALE)aircraft which exploits the mission advantage of swarm UAV and the HALE advantage of large aspect-ratio SPA.M-SPA’s separated mode a...Modular Solar-Powered Aircraft(M-SPA)is a kind of High-Altitude Long-Endurance(HALE)aircraft which exploits the mission advantage of swarm UAV and the HALE advantage of large aspect-ratio SPA.M-SPA’s separated mode and combined mode give it the potential to maximize the mission efficiency with limited solar energy.In this paper,firstly,oriented by the mission of maximizing the cruise area,the overall design of the M-SPA is modeled,including the energy model,the aerodynamic model and the flight environment settings.Secondly,by analyzing the energy consumption of the flight modes,we design a multi-phase flight mission strategy.Then,a 24-hour three-dimensional(3D)flight profile of the M-SPA is optimized,including the sub-SPA cooperative path planning in the separation mode.Finally,inspired by the Traveling Salesman Problem(TSP),an improved Ant Colony Algorithm(ACA)is exploited to find the optimal path for each sub-SPA,which is further developed into a dynamic separation and combination scheme for the M-SPA.The simulation results show that the mission performance of the M-SPA outperforms that of the conventional SPA,and explicitly,the mission coverage of the M-SPA is slightly less than a linear increase under comparable simulation conditions.展开更多
An experimental model of schizophrenia was established using dizocilpine （MK-801）. Rats were intragastrically administered with Wendan decoction or clozapine for 21 days prior to establishing the model. The results ...An experimental model of schizophrenia was established using dizocilpine （MK-801）. Rats were intragastrically administered with Wendan decoction or clozapine for 21 days prior to establishing the model. The results revealed that the latency of schizophrenia model rats to escape from the hidden platform in the Morris water maze was significantly shortened after administration of Wendan decoction or clozapine. In addition, the treated rats crossed the platform significantly more times than the untreated model rats. Moreover, the rate of successful long-term potentiation induction in the Wendan decoction group and clozapine group were also obviously increased compared with the model group, and the population spike peak latency was significantly shortened. These experimental findings suggest that Wendan decoction can improve the learning and memory ability of schizophrenic rats to the same extent as clozapine treatment.展开更多
Vessel emissions have contributed a great deal to air quality deterioration in China.Hence,the Chinese government has promulgated a series of stringent emission regulations.It is in this context that vessel emission c...Vessel emissions have contributed a great deal to air quality deterioration in China.Hence,the Chinese government has promulgated a series of stringent emission regulations.It is in this context that vessel emission control technology research is in full swing.In particular,during the 13th Five-Year Plan,the air pollution control technology of vessels has greatly improved.Vessel emission control has followed two main governance routes:source emission reduction and aftertreatment technology.Source control focuses on alternative fuels,with two main directions,the development of new fuels and the modification of existing fuels.Moreover,after-treatment technologies have also been developed,including wet desulfurization technology using seawater or alkaline liquids as wet washing liquids and selective catalytic reduction(SCR)for the control of NOx emission.Due to China’s increasingly stringent emissions standards and regulations,work on the development of clean alternative fuels and further upgrading the collaborative application of after-treatment technologies to meet the near-zero-emissions requirements of vessels is still necessary.展开更多
Objectives: To study the partial mechanism of treating postmenopausal osteoporosis patients (POPs) using the ancient recipe of Qing’E Formula (QEF) by observing its effects on bone metabolic markers and VDR mRNA expr...Objectives: To study the partial mechanism of treating postmenopausal osteoporosis patients (POPs) using the ancient recipe of Qing’E Formula (QEF) by observing its effects on bone metabolic markers and VDR mRNA expression in primary POPs. Methods: Analysis was performed on 120 outpatient and inpatient POPs treated in our hospital between January and October 2013, where the patients were randomly divided into Qing’E group (QEF + Caltrate), Calcitriol group (Caltrate + Calcitriol soft capsules), and Compare group (Caltrate), each with a follow-up period of 1 year. Statistical analysis was then performed on bone mineral density, blood bone metabolic markers (β-CTX, N-MID, T-PINP) and changes in VDR mRNA expressions in the POPs before and after the treatments. Results: Prior to the treatments, bone mineral density and blood β-CTX, N-MID, T-PINP and VDR mRNA expression in the 3 groups of POPs exhibited no statistically significant differences, and the blood β-CTX, N-MID, T-PINP and VDR mRNA expression in the control group showed no statistically significant differences before and after the treatments. There were no significant differences in bone mineral density in the Qing’E group and the Calcitriol group before and after the treatments whereas the bone mineral density decreased in the control group after the treatments. As for blood β-CTX, N-MID, T-PINP and VDR mRNA expression, the measurements in POPs in the Qing’E group and the Calcitriol group were significantly higher than that of the control group. Conclusion: By adjusting the VDR mRNA expression, the QEF, a kidney-invigorating Chinese herbal formula, is capable of activating bone metabolism to prohibit further losses of bone mass, thereby preventing the deterioration of osteoporosis.展开更多
Background: Compromised circulatory and bone/lipid metabolic dysfunction are two major contributors to non-traumatic osteonecrosis of the femoral head (ONFH). Qing’e pill plus Salvia has significant anti-inflammatory...Background: Compromised circulatory and bone/lipid metabolic dysfunction are two major contributors to non-traumatic osteonecrosis of the femoral head (ONFH). Qing’e pill plus Salvia has significant anti-inflammatory and anti-atherosclerotic action, and it could also regulate bone formation and remodeling by suppressing osteoclasts. Case Report: We describe a case of a 62-year- old man with ONFH of idiopathic type in earlier stage that could not be adequately controlled with oral non-steroidal analgesics and restoring bone loss agents for past 3 years. After six months treatment with Qing’e pill plus Salvia, the plasma low-density lipoprotein (LDL), high-density lipoprotein (HDL), apolipoprotein A1 (apo A1), apolipoprotein B (apo B), total cholesterol (TC), triglycerides (TG), and blood viscosity were measured on an empty stomach. The Harris scores were maintained during a six months follow-up after discontinuation of Qing’e pill plus Salvia. Discussion: Our case has shown that plasma levels of inflammatory and atherosclerotic relaxed factors and the Harris scores may be controlled with herbal medication in ONFH of idiopathic type in earlier stage that could not be adequately controlled with oral non-steroidal analgesics and restoring bone loss agents.展开更多
In medical diagnosis, the problem of class imbalance is popular. Though there are abundant unlabeled data, it is very difficult and expensive to get labeled ones. In this paper, an ensemble-based active learning algor...In medical diagnosis, the problem of class imbalance is popular. Though there are abundant unlabeled data, it is very difficult and expensive to get labeled ones. In this paper, an ensemble-based active learning algorithm is proposed to address the class imbalance problem. The artificial data are created according to the distribution of the training dataset to make the ensemble diverse, and the random subspace re-sampling method is used to reduce the data dimension. In selecting member classifiers based on misclassification cost estimation, the minority class is assigned with higher weights for misclassification costs, while each testing sample has a variable penalty factor to induce the ensemble to correct current error. In our experiments with UCI disease datasets, instead of classification accuracy, F-value and G-means are used as the evaluation rule. Compared with other ensemble methods, our method shows best performance, and needs less labeled samples.展开更多
Objective:To evaluate the dynamic changes in neutrophil-to-lymphocyte ratio(NLR),interleukin-6(IL-6),C-reactive protein(CRP),and procalcitonin(PCT)levels in children with Mycoplasma pneumoniae pneumonia(MPP)complicate...Objective:To evaluate the dynamic changes in neutrophil-to-lymphocyte ratio(NLR),interleukin-6(IL-6),C-reactive protein(CRP),and procalcitonin(PCT)levels in children with Mycoplasma pneumoniae pneumonia(MPP)complicated by myocardial injury and to determine their predictive value both individually and in combination.Methods:150 children diagnosed with MPP at Jiujiang Maternal and Child Health Hospital between June 2023 and June 2024 were selected.Patients were divided into the myocardial damage group(MD group,n=65)and the non-myocardial damage group(non-MD group,n=85),based on the presence of myocardial injury.Ninety hospitalized children without MPP served as the control group(Con group).Myocardial enzyme profile indicators,including lactate dehydrogenase(LDH),α-hydroxybutyrate dehydrogenase(α-HBDH),aspartate aminotransferase(AST),high-sensitivity cardiac troponin I(hs-cTnI),creatine kinase(CK),and creatine kinase-MB(CK-MB),were measured using a chemiluminescent immunoassay analyzer.Serum NLR,IL-6,CRP,and PCT levels were determined using appropriate analyzers.The correlation between these markers and myocardial enzyme indicators was analyzed using Spearman correlation analysis.Multivariate logistic regression was applied to identify risk factors for myocardial injury in MPP patients.Results:Serum levels of NLR,IL-6,CRP,and PCT in the MD and non-MD groups were significantly higher than in the Con group(P<0.05),with the MD group showing higher levels than the non-MD group(P<0.05).These markers were positively correlated with myocardial enzyme indicators.Logistic regression identified elevated NLR,IL-6,CRP,PCT,LDH,α-HBDH,AST,hs-cTnI,CK,and CK-MB as risk factors for myocardial injury in MPP patients(P<0.05).Conclusion:Elevated levels of NLR,IL-6,CRP,PCT,and myocardial enzymes are significant risk factors for myocardial injury in children with MPP,offering valuable insights for prevention and prognosis.展开更多
The rapid development of China’s automobile industry has brought ever-increasing impact on resources,energy and environment,the energy-saving and new energy vehicles come into being accordingly.This article firstly s...The rapid development of China’s automobile industry has brought ever-increasing impact on resources,energy and environment,the energy-saving and new energy vehicles come into being accordingly.This article firstly systematically introduces the technical route of energy-saving and new energy vehicles of China,focusing on the key bottleneck problems arising from the construction process of current assessment system of the technical route for energy-saving and new energy vehicles,establishes the energy-saving and new energy vehicle business model assessment index system afterward based on the comparative analysis on energy-saving and new energy vehicle business assessment model and the full life cycle theory,and finally makes prospects and forecasts on vital problems of system boundary,dynamic optimization,simulation system of full life cycle assessment of energy-saving and new energy vehicle.展开更多
The Yangtze River is the mother river of China.To promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(2017-2021)supported by the Ministr...The Yangtze River is the mother river of China.To promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(2017-2021)supported by the Ministry of Agriculture and Rural Affairs,P.R.China carried out by 24 institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2)current fish abundance,(3)endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang Lake.The results showed that there were 443 fish species(belonging to 163 genus,37 families,and 18 orders)before 2017,but only 323 fish species(including 15 new recorded exotic species)were recorded in the project of 2017-2021.Among them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River system.It is estimated that there were 886 million individuals weighing 124.8 million kg,merely equivalent to 27.3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in 1980s.In the new list of protected fishes that recorded in the Yangtze River system,only 15 of 29 were collected in this project of 2017-2021.Psephurus gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct already.Acipenser dabryanus has been affirmed to be Extinct in the Wild by IUCN.The natural propagations of A.sinensis,Myxocyprinus asiaticus and Trachidermus fasciatus have been interrupted for many years.The populations of Yangtze finless porpoise in the Yangtze River mainstream,Dongting Lake and Poyang Lake have steadily rising sizes and expanding distributions in 2017-2021.Parts of them migrate from one region to another with the seasons,which would result in the fluctuation of Yangtze finless porpoise population within some regions.The conventional indicators of water quality in the Yangtze River system were good and conformed to the water quality criteria of fishery in 2017-2021.In the last 40 years,the maximum surface water area in the Yangtze River basin extended to approximately 63,360 km2,the minimum surface water area covered approximately 26,396 km2,and the seasonal water-level fluctuation areas occupied approximately 36,964 km2.Compared with 1984-2000 period,the 2001-2020 period witnessed an overall decreasing trend in the frequency of surface water occurrence within about 25,869 km2 of aquatic areas.From 1984 to 2000 period to 2001-2020 period,permanent surface water has decreased by nearly 8,750 km2.In 2017,the fishermen were mainly 40-60 years old and their educational levels were mainly lower than junior high school.In 2017,most anglers were older than 40 and used hand rod and/or sea rod.Their average catch of each time was mainly less than 1 kg.Results suggested that the fishing ban in key waters of the Yangtze River basin is not only an ecological project of aquatic ecosystem conservation,but also a livelihood project for the fisherman to embrace industrial transformation and improve their living conditions.After the implementation of the fishing ban,the fisheries resources would gradually recover,and the Yangtze finless porpoise population size would also see a steady increase.However,the endangered species would remain threatened for a long time.The degraded waterbodies and water-level fluctuation areas would be the key restrictive factors for future aquatic ecosystem recovery in the Yangtze River basin.Since this survey was carried out before the fishing ban,the current results could provide a baseline for future evaluation of the effect of the Yangtze River fishing ban.展开更多
Since their inception, frequency combs generated in microresonators, known as microcombs, have sparked significant scientific interests. Among the various applications leveraging microcombs, soliton microcombs are oft...Since their inception, frequency combs generated in microresonators, known as microcombs, have sparked significant scientific interests. Among the various applications leveraging microcombs, soliton microcombs are often preferred due to their inherent mode-locking capability. However, this choice introduces additional system complexity because an initialization process is required. Meanwhile, despite the theoretical understanding of the dynamics of other comb states, their practical potential, particularly in applications like sensing where simplicity is valued, remains largely untapped. Here, we demonstrate controllable generation of sub-combs that bypasses the need for accessing bistable regime. And in a graphene-sensitized microresonator, the sub-comb heterodynes produce stable, accurate microwave signals for high-precision gas detection. By exploring the formation dynamics of sub-combs, we achieved 2 MHz harmonic comb-to-comb beat notes with a signal-to-noise ratio (SNR) greater than 50 dB and phase noise as low as – 82 dBc/Hz at 1 MHz offset. The graphene sensitization on the intracavity probes results in exceptional frequency responsiveness to the adsorption of gas molecules on the graphene of microcavity surface, enabling detect limits down to the parts per billion (ppb) level. This synergy between graphene and sub-comb formation dynamics in a microcavity structure showcases the feasibility of utilizing microcombs in an incoherent state prior to soliton locking. It may mark a significant step toward the development of easy-to-operate, systemically simple, compact, and high-performance photonic sensors.展开更多
A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements...A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements.Databases,including PubMed,Embase,Scopus,Ebsco,Web of Science,Chinese National Knowledge Infrastructure,Wan Fang Data,National Science and Technology Report Service,Public Health Scientific Data were searched to collect data from inception to January 2022,on energy expenditure associated with PA in the healthy Chinese population.Two reviewers independently screened the literature and extracted,classified,and summarized data.Data were measured for 36 PAs using indirect calorimetry.Detailed descriptions of specific activities and metabolic equivalent values were provided by summarizing 241 physical activities in 13 categories.The first edition of the Chinese Compilation of PAs in Healthy Adults Aged 18–64(CCPA)was created.It provides valuable resources for people who regularly engage in physical exercise,researchers,educators,fitness professionals,and health or commercial sectors to quickly obtain various PA MET intensities.In the future,the energy expenditure of various PAs of different ages within the Chinese population can be measured based on the CCPA.展开更多
文摘Objective:To explore the clinical correlation between the detection of irregular antibodies in red blood cell blood groups and hemolytic disease of the newborn.Methods:This study selected newborns who underwent examinations and were diagnosed with hemolytic disease at our hospital from October 2024 to October 2025 as the research subjects.Based on the severity of their hemolytic disease,the infants were divided into a severe group and a mild group.All the infants underwent detection for irregular antibodies in their red blood cell blood groups.General information,blood types,and irregular antibody test results of the two groups were recorded.Univariate analysis was conducted,and variables with statistical significance from the univariate analysis were included in a multivariate logistic regression analysis to explore the clinical correlation between the detection of irregular antibodies in red blood cell blood groups and hemolytic disease of the newborn.Results:Through univariate analysis,it was found that IgG1 and IgG3 subclass antibodies,as well as ABO blood group incompatibility,were statistically significant(p<0.05).When these factors were included in a multivariate logistic regression analysis,it was discovered that IgG1(OR=2.461,95%CI:1.859-2.709),IgG3(OR=2.509,95%CI:1.918-2.893),and ABO blood group incompatibility(OR=2.998,95%CI:2.149-3.493)all exhibited a positive correlation with hemolytic disease of the newborn.Conclusion:As levels of IgG1,IgG3,and ABO blood group incompatibility increase,the incidence of hemolytic disease of the newborn also rises,warranting clinical attention.
基金The 2024 Chinese Business Studies Research Project,"Special Topic on Corporate Cases'Uniting Hearts,Empowering Employees-The Cultural DNA of CP Group's 7-Eleven"(Project No.:secbr-zt-05)。
文摘With the rapid development of technology,the application of artificial intelligence in the field of education is becoming increasingly widespread.As a core course of the human resource management major,“Personnel Recruitment and Evaluation”has a strong practical characteristic,making case teaching a key link.In this context,the importance of artificial intelligence to the case teaching of this course has become more prominent.This paper uses the literature research method and case analysis method to deeply explore the effective mode of artificial intelligence,enabling the case teaching of“Personnel Recruitment and Evaluation.”The research finds that artificial intelligence plays an important role in case screening and updating,in-depth analysis,and the construction of virtual simulation scenarios.However,its application also faces problems such as high technical costs,insufficient technical abilities of teachers,and data security and privacy.In response to these challenges,this paper proposes countermeasures such as reasonable planning of technology investment,strengthening teacher training,and improving the data security management mechanism.
基金financially supported by the National Natural Science Foundation of China(Nos.51901069 and 51901013)the China Scholarship Council(No.201808410578)+1 种基金grants from the Opening Project of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Henan University of Science and Technology(No.HKDNM201906)the Fundamental Research Funds for the Central Universities(University of Science and Technology Beijing(No.06500135)。
文摘Continuous exploration of high-temperature structural materials is being driven by the needs of gasturbine engines capable of withstanding the high-temperature environment.Relatively low melting points of currently applied superalloys restrain the further improvement of service tempe ratures.With higher melting tempe ratures above 2000℃,Mo-Si-B alloys are regarded as a new generation of ultrahightemperature structural materials.However,oxidation is a concern for the industrial application of Mo-Si-B alloys.Therefore,an in-depth understanding of the oxidation mechanisms may contribute to solving this issue,whereas relevant reviews about their recent advances are lacking.In the current work,a comprehensively systematic review about the oxidation behaviors of Mo-Si-B alloys is described for this purpose.
基金supported by the National Key Research and Development Program of China(No.2019YFC0214803)。
文摘Industrial development is an essential foundation of the national economy,but the industry is also the largest source of air pollution,of which power plants,iron and steel,building materials,and other industries emit large amounts of pollutants.Therefore,the Chinese government has promulgated a series of stringent emission regulations,and it is against this backdrop that research into air pollution control technologies for key industrial sectors is in full swing.In particular,during the 13th Five-Year Plan,breakthroughs have been made in pollution control technology for key industrial sectors.A multi-pollutant treatment technology system of desulfurization,denitrification,and dust collection,which applies to key industries such as power plants,steel,and building materials,has been developed.High-performance materials for the treatment of different pollutants,such as denitrification catalysts and desulfurization absorbers,were developed.At the same time,multi-pollutant synergistic removal technologies for flue gas in various industries have also become a hot research topic,with important breakthroughs in the synergistic removal of NO_(x),SO_(x),and Hg.Due to the increasingly stringent emission standards and regulations in China,there is still a need to work on the development of multi-pollutant synergistic technologies and further research and development of synergistic abatement technologies for CO_(2) to meet the requirements of ultra-low emissions in industrial sectors.
基金supported by the National Natural Science Foundation of China (No.51678565)the Special Fund of China (No.AWS18J004)+1 种基金the Tianjin Natural Science Foundation (Nos.19JCYBJC_(2)3800, 19JCZDJC_(3)9800)the National Key R&D Program of China (No.2018YFD0800104)。
文摘Glycogen accumulating organisms(GAOs) are closely related to the deterioration of enhanced biological phosphorus removal systems. However, the metabolic mechanisms that drive GAOs remain unclear. Here, the two-thirds supernatant of a reactor were decanted following the anaerobic period to enrich GAOs. Long-term monitoring demonstrated that the system was stable and exhibited typical characteristics of GAOs metabolism. Acetate was completely consumed after 60 min of the anaerobic phase. The level of glycogen decreased from 0.20 to 0.14 g/gSS during the anaerobic phase, whereas the level of glycogen significantly increased to 0.21g/gSS at the end of the aerobic period. Moreover, there was almost no phosphate release and absorption in the complete periods, thus confirming the successful construction of a GAOs enrichment system. Microbial community analysis demonstrated that Ca. Contendobacter was among the core functional genera and showed the highest activity among all of the communities. Furthermore, our study is the first to identify the involvement of the ethyl-malonyl-CoA pathway in the synthesis of polyhydroxyvalerate via croR, ccr, ecm, mcd, mch and mcl genes. The Embden-Meyerhof-Parnas(EMP) pathway was preferentially used via glgP. Furthermore, the glyoxylate cycle was the main source of ATP under anaerobic conditions, whereas the tricarboxylic acid cycle provided ATP under aerobic conditions. aceA and mdh appeared to be major modulators of the glyoxylate pathway for controlling energy flow. Collectively, our findings not only revealed the crucial metabolic mechanisms in a GAOs enrichment system but also provided insights into the potential application of Ca. Contendobacter for wastewater treatment.
基金supported by the National Natural Science Foundation of China(Nos.61901448,61871401,12002340).
文摘Modular Solar-Powered Aircraft(M-SPA)is a kind of High-Altitude Long-Endurance(HALE)aircraft which exploits the mission advantage of swarm UAV and the HALE advantage of large aspect-ratio SPA.M-SPA’s separated mode and combined mode give it the potential to maximize the mission efficiency with limited solar energy.In this paper,firstly,oriented by the mission of maximizing the cruise area,the overall design of the M-SPA is modeled,including the energy model,the aerodynamic model and the flight environment settings.Secondly,by analyzing the energy consumption of the flight modes,we design a multi-phase flight mission strategy.Then,a 24-hour three-dimensional(3D)flight profile of the M-SPA is optimized,including the sub-SPA cooperative path planning in the separation mode.Finally,inspired by the Traveling Salesman Problem(TSP),an improved Ant Colony Algorithm(ACA)is exploited to find the optimal path for each sub-SPA,which is further developed into a dynamic separation and combination scheme for the M-SPA.The simulation results show that the mission performance of the M-SPA outperforms that of the conventional SPA,and explicitly,the mission coverage of the M-SPA is slightly less than a linear increase under comparable simulation conditions.
基金sponsored by the Natural Science Foundation of China (No. 81160423)Research Plan of Traditional Chinese Medicine of Jiangxi Province Department of Public Health (No. 2009A054)Jiangxi Provincial Youth Science Fund Project (No. GJJ11190)
文摘An experimental model of schizophrenia was established using dizocilpine （MK-801）. Rats were intragastrically administered with Wendan decoction or clozapine for 21 days prior to establishing the model. The results revealed that the latency of schizophrenia model rats to escape from the hidden platform in the Morris water maze was significantly shortened after administration of Wendan decoction or clozapine. In addition, the treated rats crossed the platform significantly more times than the untreated model rats. Moreover, the rate of successful long-term potentiation induction in the Wendan decoction group and clozapine group were also obviously increased compared with the model group, and the population spike peak latency was significantly shortened. These experimental findings suggest that Wendan decoction can improve the learning and memory ability of schizophrenic rats to the same extent as clozapine treatment.
基金supported by the National Key Research and Development Program of China(No.2019YFC0214803)。
文摘Vessel emissions have contributed a great deal to air quality deterioration in China.Hence,the Chinese government has promulgated a series of stringent emission regulations.It is in this context that vessel emission control technology research is in full swing.In particular,during the 13th Five-Year Plan,the air pollution control technology of vessels has greatly improved.Vessel emission control has followed two main governance routes:source emission reduction and aftertreatment technology.Source control focuses on alternative fuels,with two main directions,the development of new fuels and the modification of existing fuels.Moreover,after-treatment technologies have also been developed,including wet desulfurization technology using seawater or alkaline liquids as wet washing liquids and selective catalytic reduction(SCR)for the control of NOx emission.Due to China’s increasingly stringent emissions standards and regulations,work on the development of clean alternative fuels and further upgrading the collaborative application of after-treatment technologies to meet the near-zero-emissions requirements of vessels is still necessary.
文摘Objectives: To study the partial mechanism of treating postmenopausal osteoporosis patients (POPs) using the ancient recipe of Qing’E Formula (QEF) by observing its effects on bone metabolic markers and VDR mRNA expression in primary POPs. Methods: Analysis was performed on 120 outpatient and inpatient POPs treated in our hospital between January and October 2013, where the patients were randomly divided into Qing’E group (QEF + Caltrate), Calcitriol group (Caltrate + Calcitriol soft capsules), and Compare group (Caltrate), each with a follow-up period of 1 year. Statistical analysis was then performed on bone mineral density, blood bone metabolic markers (β-CTX, N-MID, T-PINP) and changes in VDR mRNA expressions in the POPs before and after the treatments. Results: Prior to the treatments, bone mineral density and blood β-CTX, N-MID, T-PINP and VDR mRNA expression in the 3 groups of POPs exhibited no statistically significant differences, and the blood β-CTX, N-MID, T-PINP and VDR mRNA expression in the control group showed no statistically significant differences before and after the treatments. There were no significant differences in bone mineral density in the Qing’E group and the Calcitriol group before and after the treatments whereas the bone mineral density decreased in the control group after the treatments. As for blood β-CTX, N-MID, T-PINP and VDR mRNA expression, the measurements in POPs in the Qing’E group and the Calcitriol group were significantly higher than that of the control group. Conclusion: By adjusting the VDR mRNA expression, the QEF, a kidney-invigorating Chinese herbal formula, is capable of activating bone metabolism to prohibit further losses of bone mass, thereby preventing the deterioration of osteoporosis.
文摘Background: Compromised circulatory and bone/lipid metabolic dysfunction are two major contributors to non-traumatic osteonecrosis of the femoral head (ONFH). Qing’e pill plus Salvia has significant anti-inflammatory and anti-atherosclerotic action, and it could also regulate bone formation and remodeling by suppressing osteoclasts. Case Report: We describe a case of a 62-year- old man with ONFH of idiopathic type in earlier stage that could not be adequately controlled with oral non-steroidal analgesics and restoring bone loss agents for past 3 years. After six months treatment with Qing’e pill plus Salvia, the plasma low-density lipoprotein (LDL), high-density lipoprotein (HDL), apolipoprotein A1 (apo A1), apolipoprotein B (apo B), total cholesterol (TC), triglycerides (TG), and blood viscosity were measured on an empty stomach. The Harris scores were maintained during a six months follow-up after discontinuation of Qing’e pill plus Salvia. Discussion: Our case has shown that plasma levels of inflammatory and atherosclerotic relaxed factors and the Harris scores may be controlled with herbal medication in ONFH of idiopathic type in earlier stage that could not be adequately controlled with oral non-steroidal analgesics and restoring bone loss agents.
文摘In medical diagnosis, the problem of class imbalance is popular. Though there are abundant unlabeled data, it is very difficult and expensive to get labeled ones. In this paper, an ensemble-based active learning algorithm is proposed to address the class imbalance problem. The artificial data are created according to the distribution of the training dataset to make the ensemble diverse, and the random subspace re-sampling method is used to reduce the data dimension. In selecting member classifiers based on misclassification cost estimation, the minority class is assigned with higher weights for misclassification costs, while each testing sample has a variable penalty factor to induce the ensemble to correct current error. In our experiments with UCI disease datasets, instead of classification accuracy, F-value and G-means are used as the evaluation rule. Compared with other ensemble methods, our method shows best performance, and needs less labeled samples.
文摘Objective:To evaluate the dynamic changes in neutrophil-to-lymphocyte ratio(NLR),interleukin-6(IL-6),C-reactive protein(CRP),and procalcitonin(PCT)levels in children with Mycoplasma pneumoniae pneumonia(MPP)complicated by myocardial injury and to determine their predictive value both individually and in combination.Methods:150 children diagnosed with MPP at Jiujiang Maternal and Child Health Hospital between June 2023 and June 2024 were selected.Patients were divided into the myocardial damage group(MD group,n=65)and the non-myocardial damage group(non-MD group,n=85),based on the presence of myocardial injury.Ninety hospitalized children without MPP served as the control group(Con group).Myocardial enzyme profile indicators,including lactate dehydrogenase(LDH),α-hydroxybutyrate dehydrogenase(α-HBDH),aspartate aminotransferase(AST),high-sensitivity cardiac troponin I(hs-cTnI),creatine kinase(CK),and creatine kinase-MB(CK-MB),were measured using a chemiluminescent immunoassay analyzer.Serum NLR,IL-6,CRP,and PCT levels were determined using appropriate analyzers.The correlation between these markers and myocardial enzyme indicators was analyzed using Spearman correlation analysis.Multivariate logistic regression was applied to identify risk factors for myocardial injury in MPP patients.Results:Serum levels of NLR,IL-6,CRP,and PCT in the MD and non-MD groups were significantly higher than in the Con group(P<0.05),with the MD group showing higher levels than the non-MD group(P<0.05).These markers were positively correlated with myocardial enzyme indicators.Logistic regression identified elevated NLR,IL-6,CRP,PCT,LDH,α-HBDH,AST,hs-cTnI,CK,and CK-MB as risk factors for myocardial injury in MPP patients(P<0.05).Conclusion:Elevated levels of NLR,IL-6,CRP,PCT,and myocardial enzymes are significant risk factors for myocardial injury in children with MPP,offering valuable insights for prevention and prognosis.
文摘The rapid development of China’s automobile industry has brought ever-increasing impact on resources,energy and environment,the energy-saving and new energy vehicles come into being accordingly.This article firstly systematically introduces the technical route of energy-saving and new energy vehicles of China,focusing on the key bottleneck problems arising from the construction process of current assessment system of the technical route for energy-saving and new energy vehicles,establishes the energy-saving and new energy vehicle business model assessment index system afterward based on the comparative analysis on energy-saving and new energy vehicle business assessment model and the full life cycle theory,and finally makes prospects and forecasts on vital problems of system boundary,dynamic optimization,simulation system of full life cycle assessment of energy-saving and new energy vehicle.
文摘The Yangtze River is the mother river of China.To promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(2017-2021)supported by the Ministry of Agriculture and Rural Affairs,P.R.China carried out by 24 institutes and universities that located in the Yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2)current fish abundance,(3)endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang Lake.The results showed that there were 443 fish species(belonging to 163 genus,37 families,and 18 orders)before 2017,but only 323 fish species(including 15 new recorded exotic species)were recorded in the project of 2017-2021.Among them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River system.It is estimated that there were 886 million individuals weighing 124.8 million kg,merely equivalent to 27.3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in 1980s.In the new list of protected fishes that recorded in the Yangtze River system,only 15 of 29 were collected in this project of 2017-2021.Psephurus gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct already.Acipenser dabryanus has been affirmed to be Extinct in the Wild by IUCN.The natural propagations of A.sinensis,Myxocyprinus asiaticus and Trachidermus fasciatus have been interrupted for many years.The populations of Yangtze finless porpoise in the Yangtze River mainstream,Dongting Lake and Poyang Lake have steadily rising sizes and expanding distributions in 2017-2021.Parts of them migrate from one region to another with the seasons,which would result in the fluctuation of Yangtze finless porpoise population within some regions.The conventional indicators of water quality in the Yangtze River system were good and conformed to the water quality criteria of fishery in 2017-2021.In the last 40 years,the maximum surface water area in the Yangtze River basin extended to approximately 63,360 km2,the minimum surface water area covered approximately 26,396 km2,and the seasonal water-level fluctuation areas occupied approximately 36,964 km2.Compared with 1984-2000 period,the 2001-2020 period witnessed an overall decreasing trend in the frequency of surface water occurrence within about 25,869 km2 of aquatic areas.From 1984 to 2000 period to 2001-2020 period,permanent surface water has decreased by nearly 8,750 km2.In 2017,the fishermen were mainly 40-60 years old and their educational levels were mainly lower than junior high school.In 2017,most anglers were older than 40 and used hand rod and/or sea rod.Their average catch of each time was mainly less than 1 kg.Results suggested that the fishing ban in key waters of the Yangtze River basin is not only an ecological project of aquatic ecosystem conservation,but also a livelihood project for the fisherman to embrace industrial transformation and improve their living conditions.After the implementation of the fishing ban,the fisheries resources would gradually recover,and the Yangtze finless porpoise population size would also see a steady increase.However,the endangered species would remain threatened for a long time.The degraded waterbodies and water-level fluctuation areas would be the key restrictive factors for future aquatic ecosystem recovery in the Yangtze River basin.Since this survey was carried out before the fishing ban,the current results could provide a baseline for future evaluation of the effect of the Yangtze River fishing ban.
基金support from the National Key Research and Development Program of China(Nos.2023YFB2805600,2021YFB2800602,2023YFB2806200)the National Natural Science Foundation of China(Grant Nos.U2130106 and 62305050)+1 种基金the National Postdoctoral Innovation Talent Support Program of China(No.BX20220056)Industrial Key Project of China Southern Power Grid(No.CG2100022001608777).
文摘Since their inception, frequency combs generated in microresonators, known as microcombs, have sparked significant scientific interests. Among the various applications leveraging microcombs, soliton microcombs are often preferred due to their inherent mode-locking capability. However, this choice introduces additional system complexity because an initialization process is required. Meanwhile, despite the theoretical understanding of the dynamics of other comb states, their practical potential, particularly in applications like sensing where simplicity is valued, remains largely untapped. Here, we demonstrate controllable generation of sub-combs that bypasses the need for accessing bistable regime. And in a graphene-sensitized microresonator, the sub-comb heterodynes produce stable, accurate microwave signals for high-precision gas detection. By exploring the formation dynamics of sub-combs, we achieved 2 MHz harmonic comb-to-comb beat notes with a signal-to-noise ratio (SNR) greater than 50 dB and phase noise as low as – 82 dBc/Hz at 1 MHz offset. The graphene sensitization on the intracavity probes results in exceptional frequency responsiveness to the adsorption of gas molecules on the graphene of microcavity surface, enabling detect limits down to the parts per billion (ppb) level. This synergy between graphene and sub-comb formation dynamics in a microcavity structure showcases the feasibility of utilizing microcombs in an incoherent state prior to soliton locking. It may mark a significant step toward the development of easy-to-operate, systemically simple, compact, and high-performance photonic sensors.
基金Funding was provided by the National Key R&D Program of China(2018YFC2000600).
文摘A Chinese Compilation of Physical Activities was compiled to estimate the energy costs of physical activities(PAs)using data on adults aged 18–64.Data were obtained from published articles and laboratory measurements.Databases,including PubMed,Embase,Scopus,Ebsco,Web of Science,Chinese National Knowledge Infrastructure,Wan Fang Data,National Science and Technology Report Service,Public Health Scientific Data were searched to collect data from inception to January 2022,on energy expenditure associated with PA in the healthy Chinese population.Two reviewers independently screened the literature and extracted,classified,and summarized data.Data were measured for 36 PAs using indirect calorimetry.Detailed descriptions of specific activities and metabolic equivalent values were provided by summarizing 241 physical activities in 13 categories.The first edition of the Chinese Compilation of PAs in Healthy Adults Aged 18–64(CCPA)was created.It provides valuable resources for people who regularly engage in physical exercise,researchers,educators,fitness professionals,and health or commercial sectors to quickly obtain various PA MET intensities.In the future,the energy expenditure of various PAs of different ages within the Chinese population can be measured based on the CCPA.
