Conventional multi-stage constant current charging strategies often use higher multiples of current to charge the battery in pursuit of shorter charging times.However,this leads to an increase in battery temperature,w...Conventional multi-stage constant current charging strategies often use higher multiples of current to charge the battery in pursuit of shorter charging times.However,this leads to an increase in battery temperature,while shortening the charging time.This in turn affects the safety of the charging process.Furthermore,the higher charging currents are not ideal for shortening the charging time in the later stages of charging.To solve the aforementioned problems,in this study,a multi-stage constant current charging strategy is presented.This strategy can shorten the battery charging time by using the increase in battery temperature during the charging process as a constraint,using a genetic algorithm to calculate the charging current value,and investigating the phased approach to charging.Finally,the charging strategy is experimentally validated at different ambient temperatures and different initial SOCs.The experimental results show that the charging strategy proposed in this paper not only reduces the amount of calculations,but also reduces the temperature rise by up to 46.4%and charging time by up to 4.2%under different operating conditions.展开更多
The genetic diversity of 35 wheat varieties was analyzed by hierarchical clustering and regression analysis based on yield,number of basic seedlings,maximum number of tillers,effective panicles,plant height,number of ...The genetic diversity of 35 wheat varieties was analyzed by hierarchical clustering and regression analysis based on yield,number of basic seedlings,maximum number of tillers,effective panicles,plant height,number of grains per panicle,and 1 000-grain weight. The linear regression analysis of wheat yield depending on wheat agronomic traits showed that the effects of the wheat agronomic traits on yield ranked as number of basic seedlings > number of effective panicles> number of grains per panicle > 1 000-grain weight > maximum number of tillers > plant height. With the mean value of all the genetic distance as reference,grouping was performed to the results of the clustering analysis. The tested materials were divided into 7 groups. Group I included ‘Annong 1202',‘Annong1207',‘Lemai W11160',‘SC1201',‘Yannong 173',‘Taike 081',‘Womai 06040',‘Tianyun 5126',‘Liumai 66'and‘Jimai 5319',10 cultivars in total; group II consisted of‘Zhongmai 155',‘Feilai 0591',‘Zhongmai 1',‘Fu 0608',‘Gushenmai 9',‘Yikemai 6',‘Longanmai 968',‘Sui 1209',‘Lvyu13',‘Zhengmai 110'and‘Longanmai 968',11 cultivars in total; group III included‘Longke 1221',‘Longmai 109'and‘Changhe 23',3 cultivars in total;group IV comprised‘Quanmai 504',‘Wanmai 998'and‘Jian 182',3 varieties in total; group V included‘An 1202',‘An 1240',‘Yuanfeng 0735',‘Fumai9375',‘Yuanyu 15'and‘Su 11033',6 in total; group Ⅵ only included‘Xinmin 8'; and group VII only included‘Jimai 6852'. These results are of great theoretical and practical significance to the improvement of wheat yield and quality through the combining of wheat cultivars and the coordination of above agronomic traits.展开更多
Environmental degradation is a pressing global concern,with the energy sector being one of the major contributors to this issue.The environmental impact of energy imports,particularly regarding natural resources incom...Environmental degradation is a pressing global concern,with the energy sector being one of the major contributors to this issue.The environmental impact of energy imports,particularly regarding natural resources income and natural gas production profitability,cannot be ignored.Countries must assess the environmental consequences of their energy choices and take steps to minimize their impact.By transitioning to cleaner and more sustainable energy sources,countries can ensure a better future for the environment and their economies.This study examines the impact of energy imports and natural resources income on environmental degradation in the Asia-Pacific Economic Cooperation(APEC)countries from 1990 to 2020,using revenue minus the production cost of natural gas and electricity production from renewable sources as moderating variables.Long-run estimates are derived using the Generalized Method of Moments and robust least squares.Our findings elucidate that importing energy from countries specializing in renewable energy can help reduce reliance on fossil fuels.This diversification of energy sources decreases the overall carbon footprint and contributes to a cleaner environment.Natural gas production often involves infrastructure construction,such as drilling rigs and pipelines,which can disrupt natural habitats and wildlife corridors.This destruction of ecosystems can have long-term consequences on biodiversity and ecological balance.The environmental impact of energy imports,particularly related to natural resource income and natural gas production profitability,requires BRICS countries to take proactive measures.These nations can address the environmental challenges associated with their energy demands by implementing policies prioritizing sustainable resource management,carbon pricing,stringent regulation,and investment in research and development.By doing so,they can balance economic growth and environmental sustainability,ensuring a greener future for the BRICS countries.展开更多
Let n>1 and B be the unit ball in n dimensions complex space C^(n).Suppose thatφis a holomorphic self-map of B andψ∈H(B)withψ(0)=0.A kind of integral operator,composition Cesàro operator,is defined by T_(...Let n>1 and B be the unit ball in n dimensions complex space C^(n).Suppose thatφis a holomorphic self-map of B andψ∈H(B)withψ(0)=0.A kind of integral operator,composition Cesàro operator,is defined by T_(φ)ψ(f)(z)=∫^(1)0f[φ(tz)]Rψ(tz)dt/t,f∈(B)z∈B.In this paper,the authors characterize the conditions that the composition Cesàro operator T_φ,ψis bounded or compact on the normal weight Zygmund space Z_μ(B).At the same time,the sufficient and necessary conditions for all cases are given.展开更多
基金supported by National Natural Science Foundation of China (Grant No. 51677058)
文摘Conventional multi-stage constant current charging strategies often use higher multiples of current to charge the battery in pursuit of shorter charging times.However,this leads to an increase in battery temperature,while shortening the charging time.This in turn affects the safety of the charging process.Furthermore,the higher charging currents are not ideal for shortening the charging time in the later stages of charging.To solve the aforementioned problems,in this study,a multi-stage constant current charging strategy is presented.This strategy can shorten the battery charging time by using the increase in battery temperature during the charging process as a constraint,using a genetic algorithm to calculate the charging current value,and investigating the phased approach to charging.Finally,the charging strategy is experimentally validated at different ambient temperatures and different initial SOCs.The experimental results show that the charging strategy proposed in this paper not only reduces the amount of calculations,but also reduces the temperature rise by up to 46.4%and charging time by up to 4.2%under different operating conditions.
基金Supported by Major Scientific and Technological Achievement Incubation Fund of Fuyang Normal University(kjfh201605)College Students’Innovation and Enterpreneurship Training Program of Fuyang Normal University(201610371023)Fund for Teaching Team Construction(Genetics)of Fuyang Normal University(2016PPTD04)
文摘The genetic diversity of 35 wheat varieties was analyzed by hierarchical clustering and regression analysis based on yield,number of basic seedlings,maximum number of tillers,effective panicles,plant height,number of grains per panicle,and 1 000-grain weight. The linear regression analysis of wheat yield depending on wheat agronomic traits showed that the effects of the wheat agronomic traits on yield ranked as number of basic seedlings > number of effective panicles> number of grains per panicle > 1 000-grain weight > maximum number of tillers > plant height. With the mean value of all the genetic distance as reference,grouping was performed to the results of the clustering analysis. The tested materials were divided into 7 groups. Group I included ‘Annong 1202',‘Annong1207',‘Lemai W11160',‘SC1201',‘Yannong 173',‘Taike 081',‘Womai 06040',‘Tianyun 5126',‘Liumai 66'and‘Jimai 5319',10 cultivars in total; group II consisted of‘Zhongmai 155',‘Feilai 0591',‘Zhongmai 1',‘Fu 0608',‘Gushenmai 9',‘Yikemai 6',‘Longanmai 968',‘Sui 1209',‘Lvyu13',‘Zhengmai 110'and‘Longanmai 968',11 cultivars in total; group III included‘Longke 1221',‘Longmai 109'and‘Changhe 23',3 cultivars in total;group IV comprised‘Quanmai 504',‘Wanmai 998'and‘Jian 182',3 varieties in total; group V included‘An 1202',‘An 1240',‘Yuanfeng 0735',‘Fumai9375',‘Yuanyu 15'and‘Su 11033',6 in total; group Ⅵ only included‘Xinmin 8'; and group VII only included‘Jimai 6852'. These results are of great theoretical and practical significance to the improvement of wheat yield and quality through the combining of wheat cultivars and the coordination of above agronomic traits.
文摘Environmental degradation is a pressing global concern,with the energy sector being one of the major contributors to this issue.The environmental impact of energy imports,particularly regarding natural resources income and natural gas production profitability,cannot be ignored.Countries must assess the environmental consequences of their energy choices and take steps to minimize their impact.By transitioning to cleaner and more sustainable energy sources,countries can ensure a better future for the environment and their economies.This study examines the impact of energy imports and natural resources income on environmental degradation in the Asia-Pacific Economic Cooperation(APEC)countries from 1990 to 2020,using revenue minus the production cost of natural gas and electricity production from renewable sources as moderating variables.Long-run estimates are derived using the Generalized Method of Moments and robust least squares.Our findings elucidate that importing energy from countries specializing in renewable energy can help reduce reliance on fossil fuels.This diversification of energy sources decreases the overall carbon footprint and contributes to a cleaner environment.Natural gas production often involves infrastructure construction,such as drilling rigs and pipelines,which can disrupt natural habitats and wildlife corridors.This destruction of ecosystems can have long-term consequences on biodiversity and ecological balance.The environmental impact of energy imports,particularly related to natural resource income and natural gas production profitability,requires BRICS countries to take proactive measures.These nations can address the environmental challenges associated with their energy demands by implementing policies prioritizing sustainable resource management,carbon pricing,stringent regulation,and investment in research and development.By doing so,they can balance economic growth and environmental sustainability,ensuring a greener future for the BRICS countries.
基金supported by the National Natural Science Foundation of China(No.11571104)the Hunan Provincial Innovation Foundation for Postgraduate(No.CX2018B286)。
文摘Let n>1 and B be the unit ball in n dimensions complex space C^(n).Suppose thatφis a holomorphic self-map of B andψ∈H(B)withψ(0)=0.A kind of integral operator,composition Cesàro operator,is defined by T_(φ)ψ(f)(z)=∫^(1)0f[φ(tz)]Rψ(tz)dt/t,f∈(B)z∈B.In this paper,the authors characterize the conditions that the composition Cesàro operator T_φ,ψis bounded or compact on the normal weight Zygmund space Z_μ(B).At the same time,the sufficient and necessary conditions for all cases are given.
