借助虚拟电厂(virtual power plant,VPP)平台,兼顾多元互补的电源侧与综合考虑需求响应的负荷侧的双侧协调配合,在考虑VPP经济性与可再生能源消纳的基础上,增加环保性目标,建立VPP源-荷协调多目标优化调度模型。针对多目标优化问题,首...借助虚拟电厂(virtual power plant,VPP)平台,兼顾多元互补的电源侧与综合考虑需求响应的负荷侧的双侧协调配合,在考虑VPP经济性与可再生能源消纳的基础上,增加环保性目标,建立VPP源-荷协调多目标优化调度模型。针对多目标优化问题,首先根据法线边界交叉法(normal boundary intersection,NBI)将其转化为一系列单目标优化问题,再利用自适应免疫遗传算法求解这类单目标优化问题,获得一系列均匀分布的Pareto最优解,最后根据层次-熵值组合赋权法决策出折中最优解。以某区域VPP为例进行仿真,验证所提方法可兼顾VPP的经济性、环保性与可再生能源消纳,同时表明源-荷协调运行的VPP,通过优化调度能有效提高可再生能源消纳水平,降低系统运行成本和对环境的污染。展开更多
Imaging blood vessels is of importance for determining the vascular distribution of organs and tumors.Phase-contrast X-ray imaging can reveal the vessels in much more detail than conventional X-ray absorption method.V...Imaging blood vessels is of importance for determining the vascular distribution of organs and tumors.Phase-contrast X-ray imaging can reveal the vessels in much more detail than conventional X-ray absorption method.Visualizing murine liver microvasculature ex vivo with phase-contrast X-ray imaging was performed at Shanghai Synchrotron Radiation Facility.Barium sulfate and physiological saline were used as contrast agents for the blood vessels.Blood vessels of <Φ20μm could be detected by replacing resident blood with physiological saline or barium sulfate.An entire branch of the portal vein (from the main axial portal vein to the ninth generation of branching) could be captured in a single phase-contrast image.It is demonstrated that selective angiography based on phase contrast X-ray imaging,with a physiological material of low Z elements (such as saline) being the contrast agent,is a viable imaging strategy.Further efforts will be focused on using the technique to image tumor angiogenesis.展开更多
为满足高速发展的社会趋势,设计一种以单片机STC12C5A60S2为控制核心和电能计量芯片ATT7022C为基础的电参数测量终端,并结合Visual Studio 2017开发数据监控界面,其中,主要包括12864液晶显示、存储、RS 232通信等模块,实现了对关键测量...为满足高速发展的社会趋势,设计一种以单片机STC12C5A60S2为控制核心和电能计量芯片ATT7022C为基础的电参数测量终端,并结合Visual Studio 2017开发数据监控界面,其中,主要包括12864液晶显示、存储、RS 232通信等模块,实现了对关键测量数据的实时监控功能。实验结果表明:所测数据均符合误差国家标准GB/T 17215.322—2008《0.2S级和0.5S级静止式有功电能表》要求;该方案具有能耗低、精度高、高效低廉易推广等优点,并且对电网输配电和电力能源结构合理配置具有促进作用,在设计工业及家庭用电智能测量设备及扩展应用方面均有较好的实用价值。展开更多
The purpose of this study was to assess the absorbed dose of tumor and main critical organs in 131I labeled chimeric tumor necrotic treatment (chTNT). In 9 patients, a single intravenous dose of (29.6±3.7) MBq/kg...The purpose of this study was to assess the absorbed dose of tumor and main critical organs in 131I labeled chimeric tumor necrotic treatment (chTNT). In 9 patients, a single intravenous dose of (29.6±3.7) MBq/kg was administered. Blood samples were drawn at different time intervals, and urine was collected for up to one week. Tissue distribution of 131I-chTNT was followed for up to one week by gamma camera imaging. Absorbed doses to the whole body and to normal organs were computed according to the MIRD scheme using Mirdose-3 software. S-factors for lung tumors were estimated by comparison with lungs of similar mass and position in the body. It was found that mean serum disappearance half time values for 131I-chTNT were (4.93±9.36) h and (61.7±21.2) h for α, β respectively, while that for whole body was(99±10) h. Mean urine biological clearance half time value was (90±10) h. The absorbed dose to tumor was (8.28±2.65) Gy, and the tumor-to-nontumor dose ratio was 3.95±1.55. And the mean effective dose to patients was (1.02±0.29) mSv/MBq.展开更多
Background Drug eluting stents （DESs） made with biodegradable polymer have been developed in an attempt to improve clinical outcomes.However,the impact of biodegradable polymers on clinical events and stent thrombos...Background Drug eluting stents （DESs） made with biodegradable polymer have been developed in an attempt to improve clinical outcomes.However,the impact of biodegradable polymers on clinical events and stent thrombosis （ST） remains controversial.Methods We searched Medline,the Cochrane Library and other internet sources,without language or date restrictions for articles comparing clinical outcomes between biodegradable polymer DES and durable polymer DES.Safety endpoints were ST （definite,definite/probable）,mortality,and myocardial infarction （MI）.Efficacy endpoints were major adverse cardiac event （MACE） and target lesion revascularization （TLR）.Results We identified 15 randomized controlled trials （n=17 068） with a weighted mean follow-up of 20.6 months.There was no statistical difference in the incidence of definite/probable ST between durable polymer-and biodegradable polymerDES; relative risk （RR） 0.83; 95% confidence interval （CI） 0.62-1.11; P=0.22.Biodegradable polymer DES had similar rates of definite ST （RR 0.94,95% CI 0.66-1.33,P=0.72）,mortality （RR 0.94,95% C/0.82-1.09,P=0.43）,MI （RR 1.08,95% CI 0.92-1.26.P=0.35）,MACE （RR 0.99,95% CI 0.91-1.09,P=0.85）,and TLR （RR,0.94,95% CI 0.83-1.06,P=0.30） compared with durable polymer DES.Based on the stratified analysis of the included trials,the treatment effect on definite ST was different at different follow-up times：≤1 year favoring durable polymer DES and 〉1 year favoring biodegradable polymer DES.Conclusions Biodegradable polymer DES has similar safety and efficacy for treating patients with coronary artery disease compared with durable polymer DES.Further data with longer term follow-up are warranted to confirm the potential benefits of biodegradable polymer DES.展开更多
文摘借助虚拟电厂(virtual power plant,VPP)平台,兼顾多元互补的电源侧与综合考虑需求响应的负荷侧的双侧协调配合,在考虑VPP经济性与可再生能源消纳的基础上,增加环保性目标,建立VPP源-荷协调多目标优化调度模型。针对多目标优化问题,首先根据法线边界交叉法(normal boundary intersection,NBI)将其转化为一系列单目标优化问题,再利用自适应免疫遗传算法求解这类单目标优化问题,获得一系列均匀分布的Pareto最优解,最后根据层次-熵值组合赋权法决策出折中最优解。以某区域VPP为例进行仿真,验证所提方法可兼顾VPP的经济性、环保性与可再生能源消纳,同时表明源-荷协调运行的VPP,通过优化调度能有效提高可再生能源消纳水平,降低系统运行成本和对环境的污染。
基金Supported by National Basic Research Program of China (973 Program Grant No.2010CB834305)
文摘Imaging blood vessels is of importance for determining the vascular distribution of organs and tumors.Phase-contrast X-ray imaging can reveal the vessels in much more detail than conventional X-ray absorption method.Visualizing murine liver microvasculature ex vivo with phase-contrast X-ray imaging was performed at Shanghai Synchrotron Radiation Facility.Barium sulfate and physiological saline were used as contrast agents for the blood vessels.Blood vessels of <Φ20μm could be detected by replacing resident blood with physiological saline or barium sulfate.An entire branch of the portal vein (from the main axial portal vein to the ninth generation of branching) could be captured in a single phase-contrast image.It is demonstrated that selective angiography based on phase contrast X-ray imaging,with a physiological material of low Z elements (such as saline) being the contrast agent,is a viable imaging strategy.Further efforts will be focused on using the technique to image tumor angiogenesis.
文摘为满足高速发展的社会趋势,设计一种以单片机STC12C5A60S2为控制核心和电能计量芯片ATT7022C为基础的电参数测量终端,并结合Visual Studio 2017开发数据监控界面,其中,主要包括12864液晶显示、存储、RS 232通信等模块,实现了对关键测量数据的实时监控功能。实验结果表明:所测数据均符合误差国家标准GB/T 17215.322—2008《0.2S级和0.5S级静止式有功电能表》要求;该方案具有能耗低、精度高、高效低廉易推广等优点,并且对电网输配电和电力能源结构合理配置具有促进作用,在设计工业及家庭用电智能测量设备及扩展应用方面均有较好的实用价值。
文摘The purpose of this study was to assess the absorbed dose of tumor and main critical organs in 131I labeled chimeric tumor necrotic treatment (chTNT). In 9 patients, a single intravenous dose of (29.6±3.7) MBq/kg was administered. Blood samples were drawn at different time intervals, and urine was collected for up to one week. Tissue distribution of 131I-chTNT was followed for up to one week by gamma camera imaging. Absorbed doses to the whole body and to normal organs were computed according to the MIRD scheme using Mirdose-3 software. S-factors for lung tumors were estimated by comparison with lungs of similar mass and position in the body. It was found that mean serum disappearance half time values for 131I-chTNT were (4.93±9.36) h and (61.7±21.2) h for α, β respectively, while that for whole body was(99±10) h. Mean urine biological clearance half time value was (90±10) h. The absorbed dose to tumor was (8.28±2.65) Gy, and the tumor-to-nontumor dose ratio was 3.95±1.55. And the mean effective dose to patients was (1.02±0.29) mSv/MBq.
文摘Background Drug eluting stents （DESs） made with biodegradable polymer have been developed in an attempt to improve clinical outcomes.However,the impact of biodegradable polymers on clinical events and stent thrombosis （ST） remains controversial.Methods We searched Medline,the Cochrane Library and other internet sources,without language or date restrictions for articles comparing clinical outcomes between biodegradable polymer DES and durable polymer DES.Safety endpoints were ST （definite,definite/probable）,mortality,and myocardial infarction （MI）.Efficacy endpoints were major adverse cardiac event （MACE） and target lesion revascularization （TLR）.Results We identified 15 randomized controlled trials （n=17 068） with a weighted mean follow-up of 20.6 months.There was no statistical difference in the incidence of definite/probable ST between durable polymer-and biodegradable polymerDES; relative risk （RR） 0.83; 95% confidence interval （CI） 0.62-1.11; P=0.22.Biodegradable polymer DES had similar rates of definite ST （RR 0.94,95% CI 0.66-1.33,P=0.72）,mortality （RR 0.94,95% C/0.82-1.09,P=0.43）,MI （RR 1.08,95% CI 0.92-1.26.P=0.35）,MACE （RR 0.99,95% CI 0.91-1.09,P=0.85）,and TLR （RR,0.94,95% CI 0.83-1.06,P=0.30） compared with durable polymer DES.Based on the stratified analysis of the included trials,the treatment effect on definite ST was different at different follow-up times：≤1 year favoring durable polymer DES and 〉1 year favoring biodegradable polymer DES.Conclusions Biodegradable polymer DES has similar safety and efficacy for treating patients with coronary artery disease compared with durable polymer DES.Further data with longer term follow-up are warranted to confirm the potential benefits of biodegradable polymer DES.
