检索结果-南通市图书馆

Energy Engineering 2023年第11期120卷 2683-2705页

作者： Chongyang Zhao Wei Chai beibei rui Lin Chen Jianbi Power Plant of National Energy Group Zhenjiang21200China

At present,the direct drive permanent magnet synchronous generator(DD-PMSG)grid connected system based on virtual synchronous generator(VSG)control will experience power oscillation at sub synchronous *** mechanism and characteristics of this new type of sub-synchronous interaction(SSI)are not yet clear,and the system cannot recover to steady state solely based on the characteristics of VSG *** when connected to a weak current network,oscillations are more pronounced,affecting the stability of the *** severe cases,the systemmay trigger shutdown protection and be disconnected from the *** research has only analyzed the oscillation mechanism under this phenomenon and has not proposed corresponding control *** article proposes aVSM control strategy based on the VSG control algorithm,which balances the dq axis component of voltage and current,and improves the voltage and current loop of VSG control to reduce the impact of sub-synchronous oscillation(SSO)on the power *** MATLAB/Simulink,a simulation model of the proposed control strategy was built to verify its correctness and effectiveness.

关键词： PMSG VSG subsynchronous oscillation impedance modelling

Recent progress in interface modification for dye-sensitized solar cells

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2010年第8期53卷 1669-1678页

作者： MA beibei,GAO rui,WANG LiDuo,ZHU YiFeng,SHI YanTao,GENG Yi,DONG HaoPeng & QIU Yong Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education Department of Chemistry,Tsinghua University,Beijing 100084,China Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education Department of Chemistry Tsinghua University Beijing China

Interface modification on the TiO2/dye/electrolyte interface of dye-sensitized solar cells (DSCs) is one of the most effective approaches to suppress the charge recombination,improve electron injection and transportation,and thus ameliorate the conversion efficiency and stability of *** research focusing on the photoanodes interface modification before sensitization in dye-sensitized solar cells has been carried out and ***,recent studies showed that post-modification after sensitization of the TiO2 electrode also plays a significant role on the TiO2/dye/electrolyte *** post-modification using the immersing method could deprotonate dye molecules,prohibit the dye aggregation and retard the recombination *** a result,it has great influence on the devices' photovoltaic *** interface modification could also provide an approach to broaden the response of the solar spectrum by introducing an alternative assembling *** in-situ meaning of using a co-adsorbent is employed to modify the interface in the DSCs,which could retard the aggregation of the dye molecules and enhance the conversion *** addition,electrolyte additives can be used to modify the TiO2/dye/electrolyte interface through some unique *** on the background of interface modification of photoanodes before sensitization,this review introduces various interface modifications after sensitization of dye-sensitized solar cells and their mechanisms.

关键词： dye-sensitized solar cell TiO2 electrode interface modification electron recombination

维普期刊数据库

Microstructure and Wear/corrosion Resistance of Stainless Steel Laser-alloyed with Mn+W_(2)C, Mn+NiWC and Mn+SiC

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 283-294页

作者： ZHOU rui DIAO Xiaogang SUN Yixin School of Metallurgical Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600China CITIC Heavy Cast Iron Industry Co. Ltd.Luoyang 417039China

In-situ formed high Mn steel coating reinforced by carbides was formed by laser surface alloying(LSA).Laser alloyed layers on 1Cr18Ni9Ti steel with Mn+W_(2)C(specimen A),Mn+NiWC(specimen B)and Mn+SiC(specimen C)powders were fabricated to improve the wear and corrosion behavior of 1Cr18Ni9Ti steel blades in high speed *** evolution,phases,element distribution,microhardness,wear and corrosion behavior of the laser alloyed layers were *** indicated that high Mn steel matrix composites with undissolved W_(2)C,WC and other in-situ formed carbides were formed by LSA with Mn+W_(2)C and Mn+NiWC while SiC totally dissolved into the high Mn matrix when adding Mn+*** as the binding phase in Ni-WC powder decreased the crack sensitivity of the alloyed layer as compared with the addition of W_(2)C *** improvement in average microhardness was achieved in the matrix in specimen A,B and C,with the value of 615,602 and 277 HV_(0.5),while that of the substrate was 212 HV_(0.5).The increase of microhardness,wear and corrosion resistance is highly corelated to microstructure,formed phases,type and content of carbides,micro-hardness and toughness of the alloyed layers.

关键词： laser surface alloying stainless steel carbide type microstructure wear and corrosion resistance

维普期刊数据库

Monte Carlo simulation for evaluation of the efficacy of linezolid,tigecycline and vancomycin against MRSA in China

在线全文

学校读者我要写书评

暂无评论

Monte Carlo simulation for evaluation of the efficacy of lin...

Monte Carlo simulation for evaluation of the efficacy of linezolid,tigecycline and vancomycin against MRSA in China

中华医学会第七届全国呼吸道感染学术大会暨第一届多学科抗感染治疗学术研讨会

作者： Liang beibei Wang rui Bai Nan Cai Yun Department of Clinical Pharmacology,General Hospital of Chinese People’s Liberation Army 100853

OBJECTIVE To compare the pharmacodynamic potency of linezolid,tigecycline and vancomycin against methicillin-resistant Staphylococcus aureus(MRSA)isolates collected in China. METHODS MIC determinations were performed for 250 MRSA *** exposure,measured as ratio of steady-state total drug area under the curve to MIC(AUC/MIC),

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Monte Carlo simulation for evaluation of the efficacy of lin...

Mitophagy in acute central nervous system injuries:regulatory mechanisms and therapeutic potentials

加快转变医药发展方式，占领科学技术制高点——2011年中国药学大会暨第11届中国药师周

作者： Liang beibei,Wang rui,Bai Nan,Cai Yun Department of Clinical Pharmacology,General Hospital of Chinese People’s Liberation Army,28 Fuxing Road,Beijing,P.R.China

OBJECTIVE:To compare the pharmacodynamic potency of linezolid,tigecycline and vancomycin against methicillin-resistant Staphylococcus aureus (MRSA) isolates collected in ***:MIC determinations were performed for 250 MRSA *** exposure,measured as ratio of steady-state total drug area under the curve to MIC (AUC/MIC),was modelled via a 10000-subject Monte Carlo *** targets included an AUC MIC >82.9 for linezolid,AUC MIC >17.9 for tigecycline and AUC MIC >400 for ***:The cumulative fraction of response (CFR) against all MRSA isolates were 88% and 85% for linezolid and *** CFRs of vancomycin in young population and vancomycin in elderly population were 87%,98%,*** regimens of linezolid,tigecycline and vancomycin performed poorly(<20%) against MRSA isolates with MIC≥4 mg L,0.5 mg L and 1.5 mg L,***:Linezolid,tigecycline and vancomycin are likely to be effective agents against MRSA isolates in ***,their ability to achieve high bactericidal or bacteriostatic pharmacodynamic exposure will be dependent on the bacterial susceptibility.

关键词： Linezolid Tigecycline Vancomycin MRSA Monte Carlo simulation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2437-2453页

作者： Siyi Xu Junqiu Jia rui Mao Xiang Cao Yun Xu Department of Neurology Nanjing Drum Tower HospitalClinical College of Jiangsu UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalChinese Academy of Medical Science&Peking Union Medical CollegeNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjingJiangsu ProvinceChina Nanjing Neurology Medical Center NanjingJiangsu ProvinceChina

Acute central nervous system injuries,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,traumatic brain injury,and spinal co rd injury,are a major global health *** optimal therapies and improving the long-term neurological functions of patients with acute central nervous system injuries are urgent *** are susceptible to damage after acute central nervous system injury,and this leads to the release of toxic levels of reactive oxygen species,which induce cell ***,a selective form of autophagy,is crucial in eliminating redundant or damaged mitochondria during these *** evidence has highlighted the significant role of mitophagy in acute central nervous system *** this review,we provide a comprehensive overview of the process,classification,and related mechanisms of *** also highlight the recent developments in research into the role of mitophagy in various acute central nervous system injuries and drug therapies that regulate *** the final section of this review,we emphasize the potential for treating these disorders by focusing on mitophagy and suggest future research paths in this area.

关键词： autophagy intracerebral hemorrhage ischemic stroke mitochondria mitochondrial biogenesis mitochondrial quality control mitophagy spinal cord injury subarachnoid hemorrhage traumatic brain injury

维普期刊数据库

Experimental Study on Diesel Spray and Flame Asymmetry Characteristics of Dual-Orifice Nozzles for a Medium-Speed Engine

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2025年第1期34卷 303-322页

作者： JU Dehao LIU rui ZHENG Liang DENG Jiahui ZHANG Wenzheng HUO Jinlu HUANG Li Shanghai Marine Diesel Engine Research Institute National Key Laboratory of Marine Engine Science and Technology Key Laboratory for Power Machinery and Engineering Ministry of EducationShanghai Jiao Tong University

The asymmetry of the multi-orifice spray will cause uneven heat load of the marine diesel engine,thereby affecting its working performance and service ***,an in-depth understanding of the spray and flame characteristics of multi-orifice nozzles will guide the optimization of the nozzle structure,needle design and diesel atomization and combustion *** this reason,four groups of dual-orifice nozzles with different hole diameters(0.1-0.55 mm) and mass flow rates covering the typical marine medium-speed diesel injections are designed and customized,and the constant volume chamber(CVC) with high temperature and pressure is used to simulate the actual in-cylinder working conditions of the diesel engine for the spray visualization *** study the asymmetry of the fuel sprays discharged from a diesel injector,the multi-orifice nozzle is simplified as a dual-orifice nozzle in this *** with X-ray Computed Tomography(CT) imaging technology,the influences of the nozzle internal structure on the spray and flame asymmetry are studied in the constructed supercritical *** is found that the asymmetry of the inlet angle and the equivalent length-diameter ratio is positively correlated with the inconsistency of the dual *** an increase in the injection pressure and nozzle diameter,the asymmetry of the dual spray becomes more pronounced,resulting in greater disparities in the ignition delay times and ignition positions of the two ***,the increase in nozzle diameter also leads to combustion instability,resulting in a flame with a serrated *** the increase of ambient temperature,the proportion of liquid phase in the jet decreases and the relative density of spray front decreases.

关键词： atomization dual-orifice nozzle nozzle structure spray flame asymmetry

Multi-receptive field interaction network for shape from polarization

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2025年第1期68卷 394-395页

作者： Yini PENG rui LIU Zhiyuan ZHANG Zhongyuan WANG Jiayi MA Xin TIAN Electronic Information School Wuhan University Computer Science School Wuhan University Wuhan Institute of Quantum Technology

Shape from polarization (SfP) method can use the polarization information in reflected light to estimate the surface normal of the target,which can further reconstruct the shape of the *** a simple image capture process,it can use low-cost equipment to meet a high precision imaging requirement,which can be used in remote scenes and other applications.

关键词：

Research progress of catalysts for direct coal liquefaction

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 481-497页

作者： Wei Song Penggao Liu Xinyue Chen Ting Wang Chunrong He rui Hao Kaiyu Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of Chemistry Xinjiang University College of Chemistry and Chemical Engineering Henan Polytechnic University Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical Engineering Central South University

Coal direct liquefaction technology is a crucial contemporary coal chemical technology for efficient and clean use of coal resources. The development of direct coal liquefaction technology and the promotion of alternative energy sources are important measures to guarantee energy security and economic security. However, several challenges need to be addressed, including low conversion rate, inadequate oil yield, significant coking, demanding reaction conditions, and high energy consumption. Extensive research has been conducted on these issues, but further exploration is required in certain aspects such as pyrolysis of macromolecules during the liquefaction process, hydrogen activation, catalysts' performance and stability, solvent hydrogenation, as well as interactions between free radicals to understand their mechanisms better. This paper presents a comprehensive analysis of the design strategy for efficient catalysts in coal liquefaction, encompassing the mechanism of coal liquefaction, catalyst construction,and enhancement of catalytic conversion efficiency. It serves as a comprehensive guide for further research endeavors. Firstly, it systematically summarizes the conversion mechanism of direct coal liquefaction, provides detailed descriptions of various catalyst design strategies, and especially outlines the catalytic mechanism. Furthermore, it addresses the challenges and prospects associated with constructing efficient catalysts for direct coal liquefaction based on an understanding of their action mechanisms.

关键词： Direct coal liquefaction Catalysts Mechanism of action Solvent hydrogenation

The linear self-attracting diffusion driven by the weighted-fractional Brownian motion II: The parameter estimation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2025年

作者： Litan Yan rui Guo Wenyi Pei Department of Statistics College of Science Donghua University School of Statistics and Mathematics Zhejiang Gongshang University

Let Ba,bbe a weighted-fractional Brownian motion with Hurst indexes a and b such that a>-1and 0≤b<1∧（1+a）.In this paper,we consider the linear self-attracting diffusion ■ interacting diffusion (see Cranston and Le Jan （1995）).Under the continuous observation,we study asymptotic ■ converges in distribution to the sum of the chi-square random variable with 1 degree of freedom and the random variable Z1a,b.

关键词：