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Neural Regeneration Research 2012年第24期7卷 1851-1857页

作者： Qiuxia zhang Hui Zhao Lei Wang Qi zhang haizheng Wang College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China

This study explored protective effects of Houshiheisan and its compound prescription of wind-dispelling drugs and deficiency-nourishing drugs on cerebral ischemia in terms of astrocyte activation and inflammatory factor *** suggested that Houshiheisan lessened neuronal degeneration in the corpus striatum on the ischemic side of rats following cerebral ischemia/reperfusion injury,contributed to astrocyte activation and glial fibrillary acidic protein expression in the corpus striatum and decreased the levels of interleukin-2,interleukin-6, interleukin-1βand tumor necrosis factor-α.Factor analysis results demonstrated that deficiency-nourishing drugs were more beneficial in protecting neurons and upregulating glial fibrillary acidic protein expression than wind-dispelling ***,wind-dispelling drugs were more effective in increasing the number of glial fibrillary acidic protein-positive cells and reducing inflammatory factor expression than deficiency-nourishing *** indicate that different ingredients of Houshiheisan suppress cerebral ischemic injury by promoting astrocyte activation and diminishing inflammatory factor expression.

关键词： Houshiheisan glial fibrillary acidic protein corpus striatum interleukin tumor necrosis factor-α cerebral ischemia neuronal protection neural regeneration

Active Power Reserve Photovoltaic Virtual Synchronization Control Technology

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Chinese Journal of Electrical Engineering 2020年第2期6卷 1-6页

作者： Xing zhang Qian Gao Yuhua Hu haizheng zhang Zixuan Guo National and Local Joint Engineering Laboratory for Renewable Energy Access to Grid Technology Hefei University of TechnologyHefei 230009China

The photovoltaic virtual synchronous generator(PV-VSG)solves the problem of lack of inertia in the PV power-generation *** existing PV plants without energy storage are required to participate in the power grid’s frequency modulation(FM),but existing PV-VSGs with energy storage have high requirements for coordinated ***,the active power reserve PV-VSG(APR-PV-VSG)is *** on the different methods to obtain the maximum power point(MPP),the peer-to-peer and master-slave APR-PV-VSG strategies are *** PV inverters are deviated from the MPP to reserve active power,which is used as the virtual inertia and primary FM *** methods equip the PV power station with FM *** effectiveness of the proposed control strategies is verified by simulation results.

关键词： Active power reserve photovoltaic virtual synchronous generator(APR-PV-VSG) peer-to-peer model master-slave model frequency regulation

新时代信访工作的重要意义、制度安排、实践要求

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党的文献 2023年第4期 43-51页

作者：张海征北京外国语大学法学院北京100089

信访工作是党的群众工作的重要组成部分,是发展全过程人民民主、保障人民当家作主的重要体现,是坚持全面依法治国、推进法治中国建设的重要抓手,是完善社会治理体系、维护国家安全和社会稳定的重要途径。新时代信访工作在实践中不断完... 详细信息

信访工作是党的群众工作的重要组成部分,是发展全过程人民民主、保障人民当家作主的重要体现,是坚持全面依法治国、推进法治中国建设的重要抓手,是完善社会治理体系、维护国家安全和社会稳定的重要途径。新时代信访工作在实践中不断完善制度安排,在信访联席会议、信访听证、督查督办、信访考核评价和经常性教育疏导等体制机制方面形成了许多有效做法、积累了许多宝贵经验。新征程上,加强和改进信访工作,必须坚持党的全面领导,加强信访工作队伍建设,不断提升信访工作信息化水平,做好源头治理,以法治思维和法治方式破解信访突出问题,为实现国家富强、民族振兴、人民幸福作出更大贡献。

关键词：新时代信访工作群众路线全面依法治国社会治理

Coordinated control strategy for a PV-storage grid-connected system based on a virtual synchronous generator

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Global Energy Interconnection 2020年第1期3卷 52-60页

作者： Xing zhang Qian Gao Zixuan Guo haizheng zhang Ming Li Fei Li National and Local Joint Engineering Laboratory for Renewable Energy Access to Grid Technology Hefei University Of Technology193 Tunxi RoadHefei230009P.R.China

Due to the characteristics of intermittent photovoltaic power generation and power fluctuations in distributed photovoltaic power generation,photovoltaic grid-connected systems are usually equipped with energy storage *** of the structures combined with energy storage are used as the DC *** the same time,virtual synchronous generators have been widely used in distributed power generation due to their inertial damping and frequency and voltage *** the PV-storage grid-connected system based on virtual synchronous generators,the existing control strategy has unclear function allocation,fluctuations in photovoltaic inverter output power,and high requirements for coordinated control of PV arrays,energy storage units,and photovoltaic inverters,which make the control strategy more *** order to solve the above problems,a control strategy for PV-storage grid-connected system based on a virtual synchronous generator is *** this strategy,the energy storage unit implements maximum power point tracking,and the photovoltaic inverter implements a virtual synchronous generator algorithm,so that the functions implemented by each part of the system are clear,which reduces the requirements for coordinated *** the same time,the smooth power command is used to suppress the fluctuation of the output power of the photovoltaic *** simulation validates the effectiveness of the proposed method from three aspects:grid-connected operating conditions,frequency-modulated operating conditions,and illumination sudden-drop operating *** with the existing control strategies,the proposed method simplifies the control strategies and stabilizes the photovoltaic inverter fluctuation in the output power of the inverter.

关键词： Photovoltaic power generation Energy storage unit Virtual synchronous generator Smooth fluctuation Coordinated control

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知识产权信用体系法治化的实践与完善

法学杂志 2022年第3期43卷 99-109页

作者：张海征北京外国语大学法学院北京100089

在知识产权领域,我国已经明确提出知识产权信用体系的顶层设计。知识产权信用的宏观体系和法律框架已经基本确立,在立法、司法、行政等多个方面开展了积极有益的探索。但是,知识产权信用体系法律框架下的具体规则仍需进一步细化和完善... 详细信息

在知识产权领域,我国已经明确提出知识产权信用体系的顶层设计。知识产权信用的宏观体系和法律框架已经基本确立,在立法、司法、行政等多个方面开展了积极有益的探索。但是,知识产权信用体系法律框架下的具体规则仍需进一步细化和完善。在系统性建设知识产权信用体系原则的指导下,信用收集制度应合理限制收录范围,信用公开制度应明确分级标准,信用评价制度应动态分级管理,信用异议制度应灵活有效。在知识产权信用体系的法治化建设过程中,确保其基本要素“信用信息”的合法性、公正性、准确性、相关性和及时性。

关键词：知识产权信用法治信用信息信用评价

Revealing the vertical structure of in-situ fabricated perovskite nanocrystals films toward efficient pure red light-emitting diodes

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Fundamental Research 2024年第2期4卷 362-368页

作者： Xian-gang Wu Shipei Sun Tinglu Song Xin zhang Chenhui Wang Yingguo Yang Shuangpeng Wang haizheng Zhong MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204China Institute of Applied Physics and Materials Engineering University of MacaoMacao 999078China

The development of efficient perovskite light-emitting diodes(PeLEDs)relies strongly on the fabrication of perovskite films with rationally designed structures(grain size,composition,surface,etc.).Therefore,an understanding of structure-performance relationships is of vital importance for developing high-performance perovskite devices,particularly for devices with in-situ fabricated perovskite nanocrystal *** this study,we reveal the vertical structure of an in-situ fabricated quasi-two-dimensional perovskite *** combining time-of-flight secondary ion mass spectrometry,energy dispersive spectroscopy,grazing incidence wide-angle X-ray scattering(GIWAXS),and low-temperature photoluminescence spectra,we illustrate that the resulting in-situ fabricated DPPA_(2)Cs_(n-1)Pb_(n)(Br_(0.3)I_(0.7))_(3n+1)(DPPA^(+):3,3-diphenylpropylammonium)film has a gradient structure with a very thin layer of ligands on the surface,predominantly small-n domains at the top,and predominantly large-n domains at the bottom owing to the solubility difference of the *** addition,GIWAXS measurements show that the domain of n=2 on the top layer has an ordered in-plane *** on the understanding of the film structure,we developed an in-situ fabrication process with ligand exchange to achieve efficient pure red PeLEDs at 638 nm with an average external quantum efficiency(EQE)of 7.4%.The optimized device had a maximum luminance of 623 cd/m^(2) with a peak EQE of 9.7%.

关键词： Light-emitting diodes Perovskite TOF-SIMS Vertical structure in-situ fabrication

Characteristics of gas geochemistry in Yangbajing geothermal field, Tibet

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Chinese Science Bulletin 1998年第21期43卷 1770-1777页

作者： Ping Zhao Ji Dor Tingli Liang Jian Jin haizheng zhang Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China Tibet Bur Geol & Mineral Resources Geothermal Geol Team Lhasa 851400 Peoples R China

CO 2 is a main component of gases in the Yangbajing geothermal field, usually higher than 85 in volume; others are N 2, H 2S, H 2, CH 4, etc. Helium R/R a ratios, ranging from 0.14 to 0.46, indicate a crustal component to be dominant in the gases. δ 13C-CO 2 values and δ 34S-H 2S values are in the range -7.72‰--11.33‰ and 0.2‰-8.3‰, respectively. The gases are inferred to mostly derive from the partial melting of the Nyainqentanglha core complex. The gases of shallow and deep reservoirs are distinctive in chemical compositions and δ 34S-H 2S values, which shows their different flowing paths and physical-chemical processes. Sulphur does not approach isotopic equilibrium between H 2S and SO 2- 4 species in both reservoirs. Significance of steam chemical monitoring is also discussed.

关键词： gas geochemistry isotope reservoir Yangbajing Tibet.

新形势下中国对维谢格拉德集团国家投资的风险和对策分析

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区域与全球发展 2022年第5期6卷 27-41,154,155页

作者：张海征梁媛媛北京外国语大学法学院北京100089 中国人民大学法学院北京100872

随着“一带一路”倡议在中东欧的全覆盖以及“中国—中东欧国家”合作机制的建立,与欧盟、美国和俄罗斯相比,作为在中东欧地区的“后来者”,中国已经与该区域的一些国家进行了深入的合作,体现为双边贸易额持续上升且投资额不断增加。维... 详细信息

随着“一带一路”倡议在中东欧的全覆盖以及“中国—中东欧国家”合作机制的建立,与欧盟、美国和俄罗斯相比,作为在中东欧地区的“后来者”,中国已经与该区域的一些国家进行了深入的合作,体现为双边贸易额持续上升且投资额不断增加。维谢格拉德集团四国投资法律制度完善,呈现出市场准入门槛较低、环境保护要求严格、税收法律体系较为复杂等特点。上述特点使得该区域投资市场环境充满了机遇,又富有挑战性。除了潜在的投资法律风险,维谢格拉德集团四国还存在因大国博弈、高度依赖欧盟结构和投资基金、进出口贸易不均衡等因素造成的政治风险和经济风险。突如其来的新冠肺炎疫情也给中国在该区域的投资造成极大影响。正确分析维谢格拉德集团四国的投资市场环境、潜在风险和当前形势,并提出相应的对策建议对我国企业在该区域实现既合法又安全的投资具有重要的现实意义。

关键词：中东欧 “一带一路”倡议维谢格拉德集团投资环境投资风险

基于变步长功率跟踪的有功备用式PV-VSG控制策略

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电力系统自动化 2019年第5期43卷 92-104页

作者：张海峥张兴李明张行管玮琦赵为合肥工业大学电气与自动化工程学院安徽省合肥市230009 阳光电源股份有限公司安徽省合肥市230088

传统光伏发电系统多以最大功率跟踪方式并网,不具备有功调频能力,而将其改造的光伏虚拟同步发电机多以配备储能的方式实现虚拟同步功能,但储能设备过于昂贵,主电路改造成本较大。针对上述问题,在不改造传统集中式光伏逆变器主电路的情况... 详细信息

传统光伏发电系统多以最大功率跟踪方式并网,不具备有功调频能力,而将其改造的光伏虚拟同步发电机多以配备储能的方式实现虚拟同步功能,但储能设备过于昂贵,主电路改造成本较大。针对上述问题,在不改造传统集中式光伏逆变器主电路的情况下,提出一种基于变步长功率跟踪的有功备用式光伏虚拟同步发电机策略,通过有功备用方式实现虚拟同步功能,节省改造成本,所提方法克服了固定步长跟踪方法快速性和稳定性不能兼容的问题,并且使光伏虚拟同步发电机快速精确地提供惯性及阻尼支撑控制。仿真结果验证了所提控制策略的有效性。

关键词：光伏虚拟同步发电机功率跟踪变步长有功备用调频调压

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一种有功备用式光伏虚拟同步控制策略

电网技术 2019年第2期43卷 514-520页

作者：张海峥张兴李明张行管玮琦赵为合肥工业大学电气与自动化工程学院安徽省合肥市230009 阳光电源股份有限公司安徽省合肥市230088

传统光伏逆变器多以最大功率跟踪方式运行,不能进行有功调频和实现有功功率灵活可控。此外,以传统光伏逆变器改造的光伏虚拟同步发电机(photovoltaicvirtual synchronous generator,PV-VSG)多配备储能电池,但储能电池成本昂贵,逆变器改... 详细信息

传统光伏逆变器多以最大功率跟踪方式运行,不能进行有功调频和实现有功功率灵活可控。此外,以传统光伏逆变器改造的光伏虚拟同步发电机(photovoltaicvirtual synchronous generator,PV-VSG)多配备储能电池,但储能电池成本昂贵,逆变器改造成本较大,针对上述问题,提出一种有功备用式光伏虚拟同步发电机控制策略,使传统光伏逆变器在不增加储能、不改造电路的情况下,具有调频调压功能,并实现了有功备用及有功功率的灵活可控。针对以往研究的不足,首先研究了PV-VSG有功备用的运行机制,并提出一种有功备用式PV-VSG控制策略,并对其进行数学建模。然后对光伏发电系统的稳定运行区域进行研究,提出最低电压限制方法,最后仿真验证了文中所提控制策略的可行性。仿真结果表明:该控制策略使传统光伏逆变器在无储能的情况下通过有功备用方式实现虚拟同步功能,并能稳定运行于光伏曲线右半平面。

关键词：光伏虚拟同步发电机有功备用稳定性最低电压限制