The significant decrease in battery performance at low temperatures is one of the critical challenges that electric vehicles(EVs)face,thereby affecting the penetration rate in cold regions.Alternating current(AC)heati...The significant decrease in battery performance at low temperatures is one of the critical challenges that electric vehicles(EVs)face,thereby affecting the penetration rate in cold regions.Alternating current(AC)heating has attracted widespread attention due to its low energy consumption and uniform heating advantages.This paper introduces the recent advances in AC heating from the perspective of practical EV applications.First,the performance degradation of EVs in low-temperature environments is introduced briefly.The concept of AC heating and its research methods are provided.Then,the effects of various AC heating methods on battery heating performance are reviewed.Based on existing studies,the main factors that affect AC heating performance are analyzed.Moreover,various heating circuits based on EVs are categorized,and their cost,size,complexity,efficiency,reliability,and heating rate are elaborated and compared.The evolution of AC heaters is presented,and the heaters used in brand vehicles are sorted out.Finally,the perspectives and challenges of AC heating are discussed.This paper can guide the selection of heater implementation methods and the optimization of heating effects for future EV applications.展开更多
Objective: To explore the therapeutic effect of traditional Chinese medicine Jianpi Qushi powder combined with standard anti-HP quadruple therapy in the treatment of HP infectious gastritis with spleen deficiency and ...Objective: To explore the therapeutic effect of traditional Chinese medicine Jianpi Qushi powder combined with standard anti-HP quadruple therapy in the treatment of HP infectious gastritis with spleen deficiency and dampness stagnation. Methods: From January 2020 to December 2021, 223 patients with laboratory-confirmed HP infection who were admitted to the Outpatient and Inpatient Department of Internal Medicine in our hospital were selected as the research objects and randomly divided into two groups. 101 patients in the control group were given standard anti HP quadruple therapy;122 cases in the treatment group were given traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy. The two groups were rechecked carbon breath test after the designed course of treatment, and the curative effects of the two groups were compared. Results: 113 cases in the treatment group were cured by traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy, and the cure rate was 92.62%. 84 cases in the control group were cured by standard anti HP quadruple therapy, and the cure rate was 83.17%, χ<sup>2</sup> = 4.7955, P = 0.0285, the difference was statistically significant (P < 0.05). Conclusion: Traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy in the treatment of HP infectious gastritis with spleen deficiency and dampness stagnation is one of the best treatment schemes for HP infection. The results of this study achieve the best clinical treatment effect, and provide a more valuable and reliable method for the treatment of gastropathy in clinical internal medicine, which is worthy of popularization and application.展开更多
We entered the age of big data characterized by data revolution at the beginning of the 21st Century.In this new age,data has become an economic resource,and an important component of scientific cognition as well.Comp...We entered the age of big data characterized by data revolution at the beginning of the 21st Century.In this new age,data has become an economic resource,and an important component of scientific cognition as well.Compared with natural language and logic language,data is a scientific language with higher accuracy and convenience.With the advent of the age of big data,ways of scientific cognition are bound to be transformed from the language turn of the 20th Century to the data turn of the 21st Century.And the possible conditions for this data turn have been prepared in terms of scientific premise,technical conditions,social background,and philosophical basis.At present,the ways of scientific cognition have begun to change from language to data,from logic to algorithm,from analysis to synthesis,from proof to discovery,and from causality to relevance.The language turn in the 20th Century will be replaced by the data turn in the 21st Century,and efforts shall be made to construct the philosophy of data,in which data is recognized as the object,algorithm as the tool,and synthesis as the method,and a wide variety of issues such as data and the world,data and language,data and algorithm,data and knowledge,data and truth,and data and ethics will be explored comprehensively.展开更多
基金supported in part by the National Key Research and Development Program of China under Grant 2021YFB1600200in part by the Shaanxi Province Postdoctoral Research Project under grant 2023BSHEDZZ223+3 种基金in part by the Fundamental Research Funds for the Central Universities,CHD,under grant 300102383101in part by the Shaanxi Province Qinchuangyuan High-Level Innovation and Entrepreneurship Talent Project under grant QCYRCXM-2023-112the Key Research and Development Program of Shaanxi Province under grant 2024GX-YBXM-442in part by the National Natural Science Foundation of China under grand 62373224.
文摘The significant decrease in battery performance at low temperatures is one of the critical challenges that electric vehicles(EVs)face,thereby affecting the penetration rate in cold regions.Alternating current(AC)heating has attracted widespread attention due to its low energy consumption and uniform heating advantages.This paper introduces the recent advances in AC heating from the perspective of practical EV applications.First,the performance degradation of EVs in low-temperature environments is introduced briefly.The concept of AC heating and its research methods are provided.Then,the effects of various AC heating methods on battery heating performance are reviewed.Based on existing studies,the main factors that affect AC heating performance are analyzed.Moreover,various heating circuits based on EVs are categorized,and their cost,size,complexity,efficiency,reliability,and heating rate are elaborated and compared.The evolution of AC heaters is presented,and the heaters used in brand vehicles are sorted out.Finally,the perspectives and challenges of AC heating are discussed.This paper can guide the selection of heater implementation methods and the optimization of heating effects for future EV applications.
文摘Objective: To explore the therapeutic effect of traditional Chinese medicine Jianpi Qushi powder combined with standard anti-HP quadruple therapy in the treatment of HP infectious gastritis with spleen deficiency and dampness stagnation. Methods: From January 2020 to December 2021, 223 patients with laboratory-confirmed HP infection who were admitted to the Outpatient and Inpatient Department of Internal Medicine in our hospital were selected as the research objects and randomly divided into two groups. 101 patients in the control group were given standard anti HP quadruple therapy;122 cases in the treatment group were given traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy. The two groups were rechecked carbon breath test after the designed course of treatment, and the curative effects of the two groups were compared. Results: 113 cases in the treatment group were cured by traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy, and the cure rate was 92.62%. 84 cases in the control group were cured by standard anti HP quadruple therapy, and the cure rate was 83.17%, χ<sup>2</sup> = 4.7955, P = 0.0285, the difference was statistically significant (P < 0.05). Conclusion: Traditional Chinese medicine Jianpi Qushi powder combined with standard anti HP quadruple therapy in the treatment of HP infectious gastritis with spleen deficiency and dampness stagnation is one of the best treatment schemes for HP infection. The results of this study achieve the best clinical treatment effect, and provide a more valuable and reliable method for the treatment of gastropathy in clinical internal medicine, which is worthy of popularization and application.
文摘We entered the age of big data characterized by data revolution at the beginning of the 21st Century.In this new age,data has become an economic resource,and an important component of scientific cognition as well.Compared with natural language and logic language,data is a scientific language with higher accuracy and convenience.With the advent of the age of big data,ways of scientific cognition are bound to be transformed from the language turn of the 20th Century to the data turn of the 21st Century.And the possible conditions for this data turn have been prepared in terms of scientific premise,technical conditions,social background,and philosophical basis.At present,the ways of scientific cognition have begun to change from language to data,from logic to algorithm,from analysis to synthesis,from proof to discovery,and from causality to relevance.The language turn in the 20th Century will be replaced by the data turn in the 21st Century,and efforts shall be made to construct the philosophy of data,in which data is recognized as the object,algorithm as the tool,and synthesis as the method,and a wide variety of issues such as data and the world,data and language,data and algorithm,data and knowledge,data and truth,and data and ethics will be explored comprehensively.
