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Hybrid Multi-Infeed Interaction Factor Calculation Method Considering Voltage Regulation Control Characteristics of Voltage Source Converter

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Energy Engineering 2024年第8期121卷 2257-2273页

作者： Shan Liu Chengbin Chi Fengze Han Yanan Wu Lin Zhu tuo wang State Grid Smart Grid Research Institute State Grid Corporation of ChinaBeijing102209China School of Electric Power Engineering Northeast Electric Power UniversityJilin132012China

Voltage source converter based high voltage direct current(VSC-HVDC)can participate in voltage regulation by flexible control to help maintain the voltage stability of the power *** order to quantitatively evaluate its influence on the voltage interaction between VSC-HVDC and line commutated converter based high voltage direct current(LCC-HVDC),this paper proposes a hybrid multi-infeed interaction factor(HMIIF)calculation method considering the voltage regulation control characteristics of ***,for a hybrid multi-infeed high voltage direct current system,an additional equivalent operating admittance matrix is constructed to characterize HVDC equipment characteristics under small ***,based on the characteristic curve between the reactive power and the voltage of a certain VSC-HVDC project,the additional equivalent operating admittance of VSC-HVDC is *** additional equivalent operating admittance matrix calculation method is ***,the equivalent bus impedance matrix is obtained by modifying the alternating current(AC)system admittance matrix with the additional equivalent operating admittance *** this basis,the HMIIF calculation method based on the equivalent bus impedance ratio is ***,the effectiveness of the proposed method is verified in a hybrid dual-infeed high voltage direct current system constructed in Power Systems Computer Aided Design(PSCAD),and the influence of voltage regulation control on HMIIF is analyzed.

关键词： Hybrid multi-infeed high voltage direct current system hybrid multi-infeed interaction factor control modes equivalent node impedance ratio voltage interaction characteristics

Frameworked electrolytes:Ionic transport behavior and high mobility for solid state batteries

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InfoMat 2024年第2期6卷 76-89页

作者： Jianguo Sun Hao Yuan Jing Yang tuo wang Yulin Gao Qi Zhao Ximeng Liu Haimei wang Yong-Wei Zhang John wang Department of Materials Science and Engineering National University of SingaporeSingaporeSingapore Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore ST Engineering Advanced Material Engineering Pte.Ltd. SingaporeSingapore National University of Singapore(Chongqing)Research Institute Chongqing Liang Jiang New AreaChongqingthe People's Republic of China Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

All solid-state batteries(ASSBs)are the holy grails of rechargeable batteries,where extensive searches are ongoing in the pursuit of ideal solid-state ***,there is still a long way off to the satisfactorily high(enough)ionic conductivity,long-term stability and especially being able to form compatible interfaces with the solid ***,we have explored ionic transport behavior and high mobility in the sub-nano pore networks in the framework ***,the frameworked electrolyte behaves as a solid,and however in the(sub)-nano scales,the very limited number of solvent molecules in confinement makes them completely different from that in liquid *** from a liquid-electrolyte counterpart,the interactions between the mobile ions and surrounding molecules are subject to dramatic changes,leading to a high ionic conductivity at room temperature with a low activation ***+ions in the sub-nano cages of the network structure are highly mobile and diffuse rather independently,where the rate-limiting step of ions crossing cages is driven by the local concentration gradient and the electrostatic interactions between Li^(+)*** new class of frameworked electrolytes(FEs)with both high ionic conductivity and desirable interface with solid electrodes are demonstrated to work with Li-ion batteries,where the ASSB with LiFePO_(4)shows a highly stable electrochemical performance of over 450 cycles at 2℃ at room temperature,with an almost negligible capacity fade of 0.03‰ each *** addition,the FE shows outstanding flexibility and anti-flammability,which are among the key requirements of large-scale applications.

关键词： frameworked electrolyte macroscopically solid with 3D ionic channels in sub-nano-scales solid-state battery space confinement of Li ions

Zhong-tuo wang: A Brief Biography

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Frontiers of Engineering Management 2014年第3期1卷 322-323+328页

作者： Xiao-ge Zhang Jin wang School of Foreign Languages Central South University Department of Project Management School of Civil Engineering Central South University (Railway Campus)

Zhong-tuo wang Professor Dalian University of TechnologyProfessor wang was born in Beijing in August *** spent his college life in the Department of Electrical Engineering of Tsinghua *** graduation from Tsinghua in 1951,he worked in Electric Department of Dalian Institute of Technology,present Dalian University of Technology,where he remains till *** 1954,he

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KHK-A promotes fructose-dependent colorectal cancer liver metastasis by facilitating the phosphorylation and translocation of PKM2

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Acta Pharmaceutica Sinica B 2024年第7期14卷 2959-2976页

作者： Chaofan Peng Peng Yang Dongsheng Zhang Chi Jin Wen Peng tuo wang Qingyang Sun Zhihao Chen Yifei Feng Yueming Sun Department of General Surgery the First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China Colorectal Institute of Nanjing Medical University Nanjing 210029China The First School of Clinical Medicine Nanjing Medical UniversityNanjing 210029China Jiangsu Province Engineering Research Center of Colorectal Cancer Precision Medicine and Translational Medicine Nanjing 210029China

Excessive fructose diet is closely associated with colorectal cancer(CRC)***,fructose’s specific function and precise mechanism in colorectal cancer liver metastasis(CRLM)is rarely ***,this study reported that the fructose absorbed by primary colorectal cancer could accelerate CRLM,and the expression of KHK-A,not KHK-C,in liver metastasis was higher than in paired primary ***,KHK-A facilitated fructose-dependent CRLM in vitro and in vivo by phosphorylating PKM2 at ***2 phosphorylated by KHK-A inhibited its tetramer formation and pyruvic acid kinase activity but promoted the nuclear accumulation of *** and aerobic glycolysis activated by nuclear PKM2 enhance CRC cells’migration ability and anoikis resistance during CRLM ***-46 treatment,targeting the phosphorylation of PKM2,inhibited the pro-metastatic effect of ***,c-myc activated by nuclear PKM2 promotes alternative splicing of KHK-A,forming a positive feedback loop.

关键词： CRC CRLM Fructose KHK-A PKM2

Disease and Economic Burden of Kashin-Beck Disease—China,2021

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China CDC weekly 2024年第2期6卷 40-44页

作者： Silu Cui Wenjun Que Zhe Jiao Qing Deng Xufeng Zhang Yanhong Cao Ning Liu Ailin Li Alphonse Sowanou Zhe Li tuo wang Yang Li Jun Yu Junrui Pei NHC Key Laboratory of Etiology and Epidemiology(Harbin Medical University) Key Laboratory of Etiology and EpidemiologyEducation Bureau of Heilongjiang ProvinceInstitute of Kashin-Beck Disease ControlCenter for Endemic Disease ControlChinese Center for Disease Control and PreventionHarbin Medical UniversityHarbin CityHeilongjiang ProvinceChina NHC Key Laboratory of Etiology and Epidemiology(Harbin Medical University) Heilongjiang Provincial Key Laboratory of Trace Elements and Human HealthKey Laboratory of Etiology and EpidemiologyEducation Bureau of Heilongjiang ProvinceInstitute of Endemic Fluorosis ControlCenter for Endemic Disease ControlChinese Center for Disease Control and PreventionHarbin Medical UniversityHarbin CityHeilongjiang ProvinceChina

What is already known about this topic?Kashin-Beck disease(KBD)is a chronic and degenerative osteoarthropathy characterized by cartilage *** is an endemic disease that is highly prevalent among the Chinese population and poses a significant health *** is added by this report?This is the first national report on the economic burden of KBD in *** to the data from 2021,KBD has caused significant disease and economic *** most substantial reduction in healthy life expectancy was observed among patients with degree II severity and those aged 60 years and older,resulting in a total indirect economic burden of 112.74 million Chinese Yuan(CNY).What are the implications for public health practice?The results of this study will contribute to informing the development of tailored prevention and control strategies by the *** strategies will include targeted policies and recommendations for appropriate healthcare and financial subsidies,which will be based on the demographic characteristics of the endemic areas.

关键词： prevention degeneration burden

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中国农村人口现状及生育意愿问题研究

清华大学学报（哲学社会科学版） 2024年第1期39卷 221-236,242页

作者：周绍杰王拓胡珺祎清华大学公共管理学院北京100084

农村人口动态、生育观念与意愿对我国乡村社会发展、国家长久稳定以及乡村振兴工作意义重大。我国农村地区人口呈现显著的下降趋势,且“少子化”问题加剧;大量育龄人口不断向城市迁移,导致农村地区生育潜力日益衰退;随着教育水平的提升... 详细信息

农村人口动态、生育观念与意愿对我国乡村社会发展、国家长久稳定以及乡村振兴工作意义重大。我国农村地区人口呈现显著的下降趋势,且“少子化”问题加剧;大量育龄人口不断向城市迁移,导致农村地区生育潜力日益衰退;随着教育水平的提升和婚育观念的转变,农村人口的生育意愿普遍较低,且在不同地域、性别、世代间存在明显差异。在促进生育的多项政策中,农村育龄人口最为关注的是住房和养老政策、就业政策以及针对多孩家庭的生育津贴和推动教育公平的举措,表明农村人口发展政策的制定需要结合实际,充分考虑政策的适应性、阶段性、差异性等特征,以确保其有效性和可行性。

关键词：农村人口现状农村生育意愿农村生育观念促进生育政策

新发展格局下的东北全面振兴:特征事实与对策建议

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经济纵横 2024年第6期 80-88页

作者：周绍杰张泽邦王拓清华大学公共管理学院北京100084

东北地区资源条件优越、产业基础坚实、区位优势明显,在我国加强东北亚区域合作、联通国内国际双循环中具有重要战略地位。但目前,东北地区的经济增长潜力尚未得到充分释放,东北地区融入新发展格局是重塑发展新优势、推动全面振兴取得... 详细信息

东北地区资源条件优越、产业基础坚实、区位优势明显,在我国加强东北亚区域合作、联通国内国际双循环中具有重要战略地位。但目前,东北地区的经济增长潜力尚未得到充分释放,东北地区融入新发展格局是重塑发展新优势、推动全面振兴取得新突破的必要途径。文章围绕如何在新发展格局下充分挖掘东北地区发展动能这一关键问题,从对内对外贸易发展态势、地区一体化程度、融入新发展格局的总体情况等角度,分析了东北地区融入新发展格局的特征事实,并进一步从行业维度分析其产业的结构性特征,发现东北地区正逐步从依赖重工业和资源型产业的传统发展模式转变为更加多元化和创新驱动的新发展模式。基于研究结论提出,新发展格局下东北全面振兴的关键在于加快体制机制改革,进一步优化营商环境,打通双循环的堵点,提升东北地区的一体化水平,全面激发融入新发展格局的内源动力和外源动力。

关键词：东北全面振兴新发展格局新质生产力

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考虑反向关断特性的晶闸管数字建模方法

高电压技术 2024年第7期50卷 2774-2783页

作者：辛业春郝欢王拓赫羽朋江守其王威儒现代电力系统仿真控制与绿色电能新技术教育部重点实验(东北电力大学) 吉林132012

常用电磁暂态仿真软件提供的晶闸管模型忽略了晶闸管的反向关断特性,导致晶闸管换流器的换相失败仿真不精准。为提高对晶闸管阀的仿真准确性,建立了考虑过零点电流变化率、正向电流峰值和结温作用下晶闸管关断特征参数反向恢复电流峰值... 详细信息

常用电磁暂态仿真软件提供的晶闸管模型忽略了晶闸管的反向关断特性,导致晶闸管换流器的换相失败仿真不精准。为提高对晶闸管阀的仿真准确性,建立了考虑过零点电流变化率、正向电流峰值和结温作用下晶闸管关断特征参数反向恢复电流峰值、反向恢复电荷和关断时间的影响关系;提出了相关影响因素在器件建模中的表征方法,建立包括晶闸管反向阻断恢复过程和正向阻断恢复过程在内的晶闸管自定义数字仿真模型,并构建了考虑器件关断特性的换流器精细化电磁暂态模型。晶闸管模型仿真结果同实际测试值对比,反向恢复电流峰值的仿真误差不超过5%,关断时间的仿真误差小于4%,提出的数字仿真模型能较精确反映晶闸管的关断过程;换流器仿真模型能更准确地反映高压直流系统换相失败特征。

关键词：关断特性换相失败关断时间反向恢复反向阻断正向阻断

基于通信对象状态判断的二乘二取二安全计算机平台主备切换研究

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铁道标准设计 2024年第6期68卷 207-213页

作者：郭亮王拓路红中国铁道科学研究院集团有限公司通信信号研究所北京100081 中国软件评测中心北京100048

铁路信号控制系统通常采用专用的二乘二取二安全计算机平台用于信息传输、逻辑运算及对象控制等功能。随着外部通信对象的种类与数量日益增多,现有的安全计算机平台主备切换方法可能存在故障发生时不切换或同一外部故障发生不必要切换... 详细信息

铁路信号控制系统通常采用专用的二乘二取二安全计算机平台用于信息传输、逻辑运算及对象控制等功能。随着外部通信对象的种类与数量日益增多,现有的安全计算机平台主备切换方法可能存在故障发生时不切换或同一外部故障发生不必要切换等问题。提出一种基于通信对象的通信状态判断的二乘二取二安全计算机平台的主备切换方法。该方法首先定义倒机值和优先级等量化指标,设计倒机值计算公式;然后从建立通信、判断通信中断和计算通信正常个数等方面,分析主用系和备用系不同的判定依据;最后比较倒机值大小,决定是否进行主备切换,并在典型场景中对该方法进行实际应用验证。结果表明:基于通信对象状态判断的主备切换方法相较于板卡级和计算通信数量的主备切换方法,提高了系统的可用性,减少了非必要倒机等影响系统安全性的现象;所设计主备切换方法通过对不同通信方式、不同冗余结构和不同控制设备分类分析,可提高系统的可靠性和安全性。

关键词：铁路信号二乘二取二安全计算机平台主备切换通信状态倒机值