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A driving pulse edge modulation technique and its complex programming logic devices implementation
Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN
《信息与电子工程前沿(英文)》 2015年 第16卷 第12期 页码 1088-1098 doi: 10.1631/FITEE.1500111
关键词: Driving pulse edge modulation Switching voltage spike Complex programmable logic device (CPLD) Active gate drive
基于可编程电压信号实现海底观测网海缆切换及故障隔离 None
Zhi-feng ZHANG, Yan-hu CHEN, De-jun LI, Bo JIN, Can-jun YANG, Jun WANG
《信息与电子工程前沿(英文)》 2018年 第19卷 第11期 页码 1328-1339 doi: 10.1631/FITEE.1601843
Stress induced polarization switching and coupled hysteretic dynamics in ferroelectric materials
Linxiang WANG, Roderick MELNIK, Fuzai LV
《机械工程前沿(英文)》 2011年 第6卷 第3期 页码 287-291 doi: 10.1007/s11465-011-0230-2
The dynamic responses of ferroelectric materials upon external mechanical and electrical stimulations are inherently nonlinear and coupled. In the current paper, a macroscopic differential model is constructed for the coupled hysteretic dynamics via modeling the orientation switching induced in the materials. A non-convex potential energy is constructed with both mechanic and electric field contributions. The governing equations are formulated as nonlinear ordinary differential equations by employing the Euler-Lagrange equation, and can be easily recast into a state space form. Hysteresis loops associated with stress induced polarization switching and butterfly-shaped behavior in ferroelectric materials are also successfully captured. The effects of mechanical loadings on the electrically induced switching are numerically investigated, as well as the mechanically-induced switching with various bias electric fields.
关键词: differential model state space electromechanical switching butterfly effects hysteresis
Xiaojing LV, Weilun ZENG, Xiaoyi DING, Yiwu WENG, Shilie WENG
《能源前沿(英文)》 2020年 第14卷 第4期 页码 790-800 doi: 10.1007/s11708-020-0691-2
关键词: gas turbine flexible switching system control system distributed power system emission test
An improved delta-star switching scheme for reactive power saving in three-phase induction motors
P. RAJA,N. KUMARESAN,M. SUBBIAH
《能源前沿(英文)》 2014年 第8卷 第3期 页码 364-370 doi: 10.1007/s11708-014-0324-8
关键词: delta-star switching induction motor power factor steady-state analysis
Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
《能源前沿(英文)》 2014年 第8卷 第3期 页码 386-393 doi: 10.1007/s11708-014-0323-9
关键词: high voltage (HV) grid frequency stability parameter identification primary frequency regulation (PFR)
Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery
Tong Zhang, Elie Paillard
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 577-591 doi: 10.1007/s11705-018-1758-z
Lithium-ion batteries are a key technology in today’s world and improving their performances requires, in many cases, the use of cathodes operating above the anodic stability of state-of-the-art electrolytes based on ethylene carbonate (EC) mixtures. EC, however, is a crucial component of electrolytes, due to its excellent ability to allow graphite anode operation–also required for high energy density batteries–by stabilizing the electrode/electrolyte interface. In the last years, many alternative electrolytes, aiming at allowing high voltage battery operation, have been proposed. However, often, graphite electrode operation is not well demonstrated in these electrolytes. Thus, we review here the high voltage, EC-free alternative electrolytes, focusing on those allowing the steady operation of graphite anodes. This review covers electrolyte compositions, with the widespread use of additives, the change in main lithium salt, the effect of anion (or Li salt) concentration, but also reports on graphite protection strategies, by coatings or artificial solid electrolyte interphase (SEI) or by use of water-soluble binder for electrode processing as these can also enable the use of graphite in electrolytes with suboptimal intrinsic SEI formation ability.
关键词: lithium-ion electrolyte solid electrolyte interphase additives high voltage graphite
A novel soft-switching twin arc pulse MAG welding inverter
WANG Zhenmin, XUE Jiaxiang, WANG Fuguang, HUANG Shisheng
《机械工程前沿(英文)》 2007年 第2卷 第2期 页码 224-227 doi: 10.1007/s11465-007-0039-1
关键词: high-speed control computer experiment indicate platform
雷振明
《中国工程科学》 2000年 第2卷 第2期 页码 53-55
国内首台ATM(异步转送方式)交换机BTC-9500的研制于1995年完成,并配合国内宽带试验网络的建设,进行了大量的组网试验、设计改进和发展工作。目前,该设备已经由国内最大的电信设备制造商之一——上海贝尔公司生产销售,并且用于装备中国电信宽带骨干网的全部核心节点。根据组网实践中发现的问题,提出了在同一个交换结构内同时实现ATM信元交换和IP数据报交换的方案,并在BTC-9500中予以实现,达到了大大节省设备、简化网络和提高网络速度的多重目的,将研究范围逐渐拓宽到更大的宽带通信领域,提出了对于新一代电信网络发展的一些看法。
关键词: 通信 交换 异步转送方式(ATM)
《能源前沿(英文)》 2022年 第16卷 第6期 页码 943-955 doi: 10.1007/s11708-021-0793-5
关键词: weak grids voltage source (VS) control wind turbine (WT) stabilization control wind farm inertial response
Development and advances in modular multilevel converter based HVDC projects in China
《工程管理前沿(英文)》 页码 183-189 doi: 10.1007/s42524-022-0248-7
关键词: high voltage direct current power converter power systems renewable energy ultra-high voltage
null
《医学前沿(英文)》 2017年 第11卷 第3期 页码 365-377 doi: 10.1007/s11684-017-0521-z
Middle East respiratory syndrome coronavirus (MERS-CoV) is a betacoronavirus which can cause acute respiratory distress in humans and is associated with a relatively high mortality rate. Since it was first identified in a patient who died in a Jeddah hospital in 2012, the World Health Organization has been notified of 1735 laboratory-confirmed cases from 27 countries, including 628 deaths. Most cases have occurred in Saudi Arabia. MERS-CoV ancestors may be found in Old World bats of the Vespertilionidae family. After a proposed bat to camel switching event, transmission of MERS-CoV to humans is likely to have been the result of multiple zoonotic transfers from dromedary camels. Human-to-human transmission appears to require close contact with infected persons, with outbreaks mainly occurring in hospital environments. Outbreaks have been associated with inadequate infection prevention and control implementation, resulting in recommendations on basic and more advanced infection prevention and control measures by the World Health Organization, and issuing of government guidelines based on these recommendations in affected countries including Saudi Arabia. Evolutionary changes in the virus, particularly in the viral spike protein which mediates virus-host cell contact may potentially increase transmission of this virus. Efforts are on-going to identify specific evidence-based therapies or vaccines. The broad-spectrum antiviral nitazoxanide has been shown to have in vitro activity against MERS-CoV. Synthetic peptides and candidate vaccines based on regions of the spike protein have shown promise in rodent and non-human primate models. GLS-5300, a prophylactic DNA-plasmid vaccine encoding S protein, is the first MERS-CoV vaccine to be tested in humans, while monoclonal antibody, m336 has given promising results in animal models and has potential for use in outbreak situations.
关键词: MERS-CoV Saudi Arabia spike protein transmission evolution vaccine
《能源前沿(英文)》 页码 782-795 doi: 10.1007/s11708-023-0905-8
关键词: distributed photovoltaics (DPVs) cluster partitioning improved differential evolution algorithm voltage control consumption capacity of distributed photovoltaics
Baicheng HUANG, Kegong TIAN
《农业科学与工程前沿(英文)》 2020年 第7卷 第2期 页码 218-226 doi: 10.15302/J-FASE-2020324
Emergent coronaviruses (CoVs) such as SARS-CoV and MERS-CoV have posed great threats to public health worldwide over the past two decades. Currently, the emergence of SARS-CoV-2 as a pandemic causes greater public health concern. CoV diversity is due to the large size and replication mechanisms of the genomes together with having bats as their optimum natural hosts. The ecological behavior and unique immune characteristics of bats are optimal for the homologous recombination of CoVs. The relationship of spatial structural characteristics of the spike protein, a protein that is critical for recognition by host receptors, in different CoVs may provide evidence in explaining the coevolution of CoVs and their hosts. This information may help to enhance our understanding of CoV evolution and thus provide part of the basis of preparations for any future outbreaks.
关键词: bat coronavirus evolution host receptor spike protein transmission
标题 作者 时间 类型 操作
A driving pulse edge modulation technique and its complex programming logic devices implementation
Xiao CHEN,Dong-chang QU,Yong GUO,Guo-zhu CHEN
期刊论文
基于可编程电压信号实现海底观测网海缆切换及故障隔离
Zhi-feng ZHANG, Yan-hu CHEN, De-jun LI, Bo JIN, Can-jun YANG, Jun WANG
期刊论文
Stress induced polarization switching and coupled hysteretic dynamics in ferroelectric materials
Linxiang WANG, Roderick MELNIK, Fuzai LV
期刊论文
Experimental investigation of a novel micro gas turbine with flexible switching function for distributed
Xiaojing LV, Weilun ZENG, Xiaoyi DING, Yiwu WENG, Shilie WENG
期刊论文
An improved delta-star switching scheme for reactive power saving in three-phase induction motors
P. RAJA,N. KUMARESAN,M. SUBBIAH
期刊论文
Parameter identification of interconnected power system frequency after trip-out of high voltage transmission
Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG
期刊论文
Recent advances toward high voltage, EC-free electrolytes for graphite-based Li-ion battery
Tong Zhang, Elie Paillard
期刊论文
A novel soft-switching twin arc pulse MAG welding inverter
WANG Zhenmin, XUE Jiaxiang, WANG Fuguang, HUANG Shisheng
期刊论文
Analysis and stabilization control of a voltage source controlled wind farm under weak grid conditions
期刊论文
Cluster voltage control method for “Whole County” distributed photovoltaics based on improved differential
期刊论文