By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-c...By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-city for example to assess the environmental performance of eco-city construction from the perspectives of land, water environment, regional weather, and biodiversity. On this basis, a scientific, objective and feasible evaluation method and index system was basically formed so as to demonstrate the efficiency of eco-city construction, and to provide scientific support for the dynamic adjustment and optimization of eco-city construction.展开更多
As an effective environment governance tool,environment governance performance evaluation is an important content and method to promote the modernization of environment governance system and governance ability.The env...As an effective environment governance tool,environment governance performance evaluation is an important content and method to promote the modernization of environment governance system and governance ability.The environmental pollution of the Beijing-Tianjin-Hebei region has typical cross-administrative characteristics.Based on the analysis of the major environmental pollution problems in the Beijing-Tianjin-Hebei region,according to the international environment governance PSR model,a performance evaluation system that applies to the environment governance of Beijing-Tianjin-Hebei region is established.Meanwhile,the principal component analysis method is applied to conduct an empirical analysis of the environmental governance panel data for the 13 major cities in the Beijing-Tianjin-Hebei region from 2014 to 2016.The results show that most of the cities in the Beijing-Tianjin-Hebei region attach great importance to reduction of emission and pollutants,continuously alleviating the stress of environmental governance.However,the overall improvement of the environment governance performance in Beijing-Tianjin-Hebei region has presented a polarization imbalance.There is a clear tendency for subjective biases in the implementation of environment governance and a lack of comprehensive and systematic governance.According to the environment governance performance evaluation result of Beijing-Tianjin-Hebei region,the cross-administrative regional environment governance should improve the environment governance performance evaluation system as soon as possible,strengthen the consistency of the environment governance objectives,and implement comprehensive and systematic governance for the regional environment.展开更多
目的：利用NCCLS EP 10-A2文件对亮氨酸氨基肽酶（LAP）试剂盒的临床应用性能进行初步评价。方法：按照美国临床实验室标准化委员会（NCCLS）颁布的EP10-A2文件，连续5天按特定顺序测定高、中、低浓度样本的LAP，计算测定结果的偏差、...目的：利用NCCLS EP 10-A2文件对亮氨酸氨基肽酶（LAP）试剂盒的临床应用性能进行初步评价。方法：按照美国临床实验室标准化委员会（NCCLS）颁布的EP10-A2文件，连续5天按特定顺序测定高、中、低浓度样本的LAP，计算测定结果的偏差、总不精密度、截距、斜率、非线性、携带污染和漂移。结果：高、中、低浓度LAP样本偏差分别为0.71，0.16和0.05 U/L；总不精密度分别为2.42%，2.29%和1.22%；截距、斜率、非线性、携带污染、漂移分别为1.178、0.986、1.080、0.000、-0.080，差异均无统计学意义（P〉0.01）。结论：LAP试剂盒准确度和精密度良好，线性良好，携带污染率较低，稳定性较好，性能指标可满足临床应用要求。展开更多
‘Co-control',or synergistically reducing CO_(2)and local air polluta nt emissions,is an important strategy for cities to achieve'low carb on'and'blue sky'simultaneously.However,there were few stud...‘Co-control',or synergistically reducing CO_(2)and local air polluta nt emissions,is an important strategy for cities to achieve'low carb on'and'blue sky'simultaneously.However,there were few studies to evaluate and compare the level of co-control of CO_(2) and local air pollutants in cities year.The present study proposed qualitative and quantitative methods to evaluate the level of co-control of CO_(2)and three local air pollutant(SO_(2).NOX,and particulate matter PM)emissions in key environmental protection cities in China over two periods(2012-2015 and 2015-2018).Statistical analysis found that,though three local air pollutant emissions positively correlated with CO_(2) emission,no significantly positive correlation was found between local air pollutants emission reductions and CO_(2) emission reductions,indicating that co-control effects were poor in general.By using the co-control effect coordinate system,qualitative evaluation showed that less than half of the sample cities could achieve co-control of the total amount of CO_(2) and local air pollutants.By employing the indicator of emission reduction equivalence(EReq),quantitative evaluation showed that the co-control level of the sample cities improved in 2015-2018 compared with 2012-2015.Further regression analysis showed that,reducing coal consumption and economic development significantly enhanced the co-control performance of the observed cities.The present case study proved that the proposed methods for evaluation and comparison of the city co-control performance works well,and can be used in other countries and regions to promote global cities racing to carbon and local air pollutants co-control.展开更多
电动助力转向(electric power steering,EPS)控制器动态性能直接影响EPS总成的快速响应性和平稳性.利用Matlab/Si mulink创建EPS控制器模型,设计了EPS基本助力特性和包含PID算法、电流反馈的控制策略;利用AMESi m创建EPS负载模型并组装...电动助力转向(electric power steering,EPS)控制器动态性能直接影响EPS总成的快速响应性和平稳性.利用Matlab/Si mulink创建EPS控制器模型,设计了EPS基本助力特性和包含PID算法、电流反馈的控制策略;利用AMESi m创建EPS负载模型并组装系统仿真模型,定义软件的数据交换接口并进行联合仿真.通过仿真,研究了三种标准激励下控制器动态性能的评价方法,讨论了助力电机关键参数对控制器性能的影响.结果表明,依托特定负载建模构建半物理仿真系统,进行脱离EPS总成环境的控制器动态性能试验是可行的.展开更多
基金Sponsored by Soft Sscience Research Program of the Ministry of Housing and Urban-Rural Development of the People’s Republic of China(2015-K3-024)Guangdong Provincial Key Scientific and Technological Program(2012A010800011)+1 种基金"The Twelfth Five-year Plan"National Scientific and Technological Support Program(2012BAC13B04)Guangdong Provincial Natural Science Foundation(S2013010014467)
文摘By reviewing researches on environmental performance evaluation of current eco-city construction, this paper analyzed characteristics and deficiencies of the evaluation methods and index systems, and took Haizhu Eco-city for example to assess the environmental performance of eco-city construction from the perspectives of land, water environment, regional weather, and biodiversity. On this basis, a scientific, objective and feasible evaluation method and index system was basically formed so as to demonstrate the efficiency of eco-city construction, and to provide scientific support for the dynamic adjustment and optimization of eco-city construction.
基金financially supported by Youth Project of National Social Science Fund of China(Grant No.17CZZ021).
文摘As an effective environment governance tool,environment governance performance evaluation is an important content and method to promote the modernization of environment governance system and governance ability.The environmental pollution of the Beijing-Tianjin-Hebei region has typical cross-administrative characteristics.Based on the analysis of the major environmental pollution problems in the Beijing-Tianjin-Hebei region,according to the international environment governance PSR model,a performance evaluation system that applies to the environment governance of Beijing-Tianjin-Hebei region is established.Meanwhile,the principal component analysis method is applied to conduct an empirical analysis of the environmental governance panel data for the 13 major cities in the Beijing-Tianjin-Hebei region from 2014 to 2016.The results show that most of the cities in the Beijing-Tianjin-Hebei region attach great importance to reduction of emission and pollutants,continuously alleviating the stress of environmental governance.However,the overall improvement of the environment governance performance in Beijing-Tianjin-Hebei region has presented a polarization imbalance.There is a clear tendency for subjective biases in the implementation of environment governance and a lack of comprehensive and systematic governance.According to the environment governance performance evaluation result of Beijing-Tianjin-Hebei region,the cross-administrative regional environment governance should improve the environment governance performance evaluation system as soon as possible,strengthen the consistency of the environment governance objectives,and implement comprehensive and systematic governance for the regional environment.
文摘目的：利用NCCLS EP 10-A2文件对亮氨酸氨基肽酶（LAP）试剂盒的临床应用性能进行初步评价。方法：按照美国临床实验室标准化委员会（NCCLS）颁布的EP10-A2文件，连续5天按特定顺序测定高、中、低浓度样本的LAP，计算测定结果的偏差、总不精密度、截距、斜率、非线性、携带污染和漂移。结果：高、中、低浓度LAP样本偏差分别为0.71，0.16和0.05 U/L；总不精密度分别为2.42%，2.29%和1.22%；截距、斜率、非线性、携带污染、漂移分别为1.178、0.986、1.080、0.000、-0.080，差异均无统计学意义（P〉0.01）。结论：LAP试剂盒准确度和精密度良好，线性良好，携带污染率较低，稳定性较好，性能指标可满足临床应用要求。
基金This work was co-supported by The Energy Foundation project‘Co-control effect assessment of deep decarbonization measures and the co-control path way in China'(G-1809-28536)the Major Projects of the National Social Science Foundation‘Study on action plan for peaking carbon emissions by 2030 in China'(21ZDA085).
文摘‘Co-control',or synergistically reducing CO_(2)and local air polluta nt emissions,is an important strategy for cities to achieve'low carb on'and'blue sky'simultaneously.However,there were few studies to evaluate and compare the level of co-control of CO_(2) and local air pollutants in cities year.The present study proposed qualitative and quantitative methods to evaluate the level of co-control of CO_(2)and three local air pollutant(SO_(2).NOX,and particulate matter PM)emissions in key environmental protection cities in China over two periods(2012-2015 and 2015-2018).Statistical analysis found that,though three local air pollutant emissions positively correlated with CO_(2) emission,no significantly positive correlation was found between local air pollutants emission reductions and CO_(2) emission reductions,indicating that co-control effects were poor in general.By using the co-control effect coordinate system,qualitative evaluation showed that less than half of the sample cities could achieve co-control of the total amount of CO_(2) and local air pollutants.By employing the indicator of emission reduction equivalence(EReq),quantitative evaluation showed that the co-control level of the sample cities improved in 2015-2018 compared with 2012-2015.Further regression analysis showed that,reducing coal consumption and economic development significantly enhanced the co-control performance of the observed cities.The present case study proved that the proposed methods for evaluation and comparison of the city co-control performance works well,and can be used in other countries and regions to promote global cities racing to carbon and local air pollutants co-control.
文摘电动助力转向(electric power steering,EPS)控制器动态性能直接影响EPS总成的快速响应性和平稳性.利用Matlab/Si mulink创建EPS控制器模型,设计了EPS基本助力特性和包含PID算法、电流反馈的控制策略;利用AMESi m创建EPS负载模型并组装系统仿真模型,定义软件的数据交换接口并进行联合仿真.通过仿真,研究了三种标准激励下控制器动态性能的评价方法,讨论了助力电机关键参数对控制器性能的影响.结果表明,依托特定负载建模构建半物理仿真系统,进行脱离EPS总成环境的控制器动态性能试验是可行的.
