检索结果-内蒙古大学图书馆

Graphene: Large‐Area Si‐Doped Graphene: Controllable Synthesis and Enhanced Molecular Sensing (Adv. Mater. 45/2014)

advanced Materials 2014年第45期26卷

作者： Ruitao Lv Maria Cristina dos Santos Claire Antonelli Simin Feng Kazunori Fujisawa Ayse Berkdemir Rodolfo Cruz‐Silva Ana Laura Elías Nestor Perea‐Lopez Florentino López‐Urías Humberto Terrones Mauricio Terrones Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China Instituto de Física Universidade de São Paulo 05508‐090 São Paulo SP Brazil Department of Materials Science & Engineering Universidad Carlos III de Madrid Madrid Spain Department of Physics and Center for 2‐Dimensional and Layered Materials The Pennsylvania State University University Park PA 16802 USA Institute of Carbon Science and Technology Shinshu University Wakasato 4–17–1 Nagano 380‐853 Japan Advanced Materials Department IPICYT Camino a la Presa San José 2055 Col. Lomas 4a sección San Luis Potosí S.L.P. 78216 México Department of Physics Advanced Physics and Astronomy Rensselaer Polytechnic Institute 100 Eighth Street Troy NY 12180 USA Department of Chemistry Department of Materials Science and Engineering The Pennsylvania State University University Park PA 16802 USA

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on Arc Duration under External Transverse Magnetic Fields in a DC 580V Circuit

Experimental Study on Arc Duration under External Transverse...

引用

The 26th International Conference on Electrical contacts and the 4th International Conference on Reliability of Electrical Products & Electrical Contacts

作者： Liu Yun Li Zhenbiao Wang Ke Wang Ronghua State Key Laboratory of Advanced Electromagnetic Engineering and Technology College of Electrical and Electronic Engineering Huazhong University of science and technology

ISBN: (纸本)9781622763139

Using transverse magnetic field(TMF) is one of the most important ways to improve the electric life and the breaking capacity of DC *** order to better understand the influence of transverse magnetic field on arc duration,a series of experiments were conducted under external transverse magnetic field with 4 relay contacts in a DC 580V/60A *** permanent magnets,the transverse magnetic field is obtained and the magnetic flux density at center magnet can be varied from 80 to 320 *** results show that the making arc duration is independent of magnetic flux density,but the breaking arc duration is decreased monotonically with the increase of the magnetic flux *** addition,the gradient |Δt/ΔB| of the breaking arc duration is decreased with the increase of the magnetic flux density,which means the curve of t-B tends to be flat.

关键词： transverse magnetic field(TMF) arc duration relay contact

来源：评论

学校读者我要写书评

暂无评论

Phase current differential protection for transformers in wye-delta mode

引用

Telkomnika 2012年第6期10卷 1280-1286页

作者： Wang, Yuxue Yin, Xianggen Zhang, Zhe Li, Zhenxing The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

For the current transformers (CTs) on the delta side measure the line current instead of the phase current, line current differential protection is adopted in transformers connected in wye-delta mode currently. However, the symmetry feature of inrush current in line current differential protection may invalidate the inrush current restrained criterion. A calculating method of current through delta windings according the measured current from CT is proposed in this paper. Using this calculated current, phase current differential protection can be realized. Based on the method an adaptive second harmonic restrained scheme for magnetizing inrush current is presented. The scheme not only adaptively adjusts the secondary harmonic ratio of restrained current but also guarantees the fast action when transformers with internal faults are no-load energized. Consequently the performance of transformer differential protection is greatly improved. Simulation results in Matlab/Simulink validate the proposed method. © 2012 Universitas Ahmad Dahlan.

关键词： Transformer protection

来源：评论

学校读者我要写书评

暂无评论

Inactivate adenovirus by using a room temperature plasma needle

Inactivate adenovirus by using a room temperature plasma nee...

引用

IEEE International Conference on Plasma Science (ICOPS)

作者： Z. Xiong X. Lu State key laboratory of advanced electromagnetic engineering and technology Huazhong University of Science and Technology Wuhan Hubei China

Summary form only given. A very large number of serious human and animal diseases such as AIDS, SARS, common cold, human and avian influenza, chickenpox, and several others are caused by viral infections. The infectious agents of these diseases are virus nanoparticles (virions) that contain DNA/RNA strands encased in a capsid protein coat and in some cases also in an outer lipid envelope. The virions are usually transmitted from the infected cases through airborne dissemination or diffusion during nosocomial transfusion of blood or body liquids. The onset of the viral infection is usually heralded by the entry of the virion's genetic material into the intracellular space followed by the uncontrollable integration with the host DNA and virus replication. Despite decades of research, virion detection, pre-emptive and post-infection anti-viral treatments and immunotherapies remain ineffective and the morbidity and mortality rates due to the associated infections remain high.

关键词： Plasmas Humans Adenoviruses Needles Diseases DNA Proteins

来源：评论

学校读者我要写书评

暂无评论

Atmospheric plasma brush driven by sub-microsecond voltage pulses

Atmospheric plasma brush driven by sub-microsecond voltage p...

引用

IEEE International Conference on Plasma Science (ICOPS)

作者： S. Wu X. Lu State key laboratory of advanced electromagnetic engineering and technology Huazhong University of Science and Technology Wuhan Hubei China

Plasma jet devices generate plasmas in an open space (surrounding air) rather than in lieu of confined discharge gaps. Hence, they can be used for direct treatment and there is also no limitation on the size of the object. However, to the best of our knowledge, the dimensions of plasma jet nozzles that have been reported in the literature are mainly very small (sub-millimeter to several millimeters) making treatment of a large area difficult, only few large plasma jets are developed. One way to overcome this shortcoming is the use of plasma jet arrays. However, since individual plasma plumes generated by these plasma jet arrays are independent and not merged, it is relatively difficult to achieve uniform treatment effects.

关键词： Brushes Surface treatment Plasma sources Laboratories electromagnetics Educational institutions

来源：评论

学校读者我要写书评

暂无评论

A novel fault phase selector for double-circuit transmission lines

引用

Telkomnika - Indonesian Journal of Electrical engineering 2012年第7期10卷 1730-1738页

作者： Deng, Xing Yin, Xianggen Zhang, Zhe Kong, Xiangping Qiu, Cheng The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

A novel fault phase selector for double-circuit transmission lines is presented. The fault type is determined with the superimposed components and steady state components of fault voltage. According to the determined fault type, auxiliary criteria based on the magnitude and phase difference of fault phase current is applied to judge whether inter-line fault happens or not. If inter-line fault happens, the fault phase is determined by comprehensive criteria based on the comparison of current magnitude and the judgment of impedance direction. The simulation results verify the correction of the proposed phase selector. © 2012 Universitas Ahmad Dahlan.

关键词： Electric lines

来源：评论

学校读者我要写书评

暂无评论

Experimental investigation of surface flashover characteristics in vacuum

Experimental investigation of surface flashover characterist...

引用

IEEE Symposium Power Modulator

作者： Ling Dai Fuchang Lin Xiangyu Shi Xingchen Yao Yaohong Cheng Zhiwei Li Cheng Su State Key laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan Hebei China

This paper devotes itself to the experimental study on surface flashover characteristics of insulating material, which is closely connected to the compact pulsed power system operating in vacuum. The rated voltage of the pulsed power source is several kV and the peak current is several kA. To simulate the actual operating condition and possible failure mode of pulsed power system, a series of experiments are performed to validate the adaptability of high pulsed power device in vacuum. This paper concentrates on the mechanism of surface flashover in vacuum and corresponding influence factors. Different metal electrode materials, different creepage distances and the interference effect of hot plasma have been studied. Research indicates that external plasma plays a key role in the formation of surface flashover. In medium vacuum (1×10 -3 Pa), the surface flashover voltage of 3mm surface creeping distance on organic glass is above 17 kV; But if there is external plasma source, the flashover voltage would reduce significantly with the increase of plasma density; flashover voltage would rush to 1 kV or lower. Based on the experiment study, some measures are taken on the several kilovolts pulsed power source (PPS) produced in prior work. The device can operate stably in the vacuum of 10 -3 Pa.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Communication modeling for wide-area relay protection based on IEC 61850

引用

Telkomnika - Indonesian Journal of Electrical engineering 2012年第7期10卷 1673-1684页

作者： Chen, Guoyan Yin, Xianggen Zhang, Kai The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

Wide-area communication system is supporting platform for wide-area relay protection (WARP) exchanging information, which includes not only visible physical communication equipment and links, but also communication protocols and other upper communication services. WARP communication has become an important issue in WARP practical applications, but it has not been described in IEC 61850 standard. To solve this issue, this paper firstly presents the general steps of WARP modeling according to the layer upon layer modeling methods of IEC 61850 standard, then proposes a tree structure model of master station and affiliate stations with information interaction model between master station and affiliate stations following IEC 61850 by taking a 220kV smart substation and WARP algorithm based on fault voltage distribution for example, finally establishes a communication model of WARP that includes client/server transfer model, electrical value transmission model and logical status variables transmission model. The fundamental purpose of constructing the communication model is to implement the interoperability between WARP-IED (WARP-Intelligent Electronic Devices) and other IEDs in a smart substation. © 2012 Universitas Ahmad Dahlan.

关键词： Trees (mathematics)

来源：评论

学校读者我要写书评

暂无评论

Architecture and fault identification of wide-area protection system

引用

Telkomnika - Indonesian Journal of Electrical engineering 2012年第3期10卷 442-450页

作者： Li, Zhenxing Yin, Xianggen Zhang, Zhe Wang, Yuxue The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

Wide-area protection system (WAPS) is widely studied for the purpose of improving the performance of conventional backup protection. In this paper, the system architecture of WAPS is proposed and its key technologies are discussed in view of engineering projects. So a mixed structurecentralized-distributed structure which is more suitable for WAPS in limited power grid region, is obtained based on the advantages of the centralized structure and distributed structure. Furthermore, regional distance protection algorithm was taken as an example to illustrate the functions of the constituent units. Faulted components can be detected based on multi-source imformation fuse in the algorithm. And the algorithm cannot only improved the selectivity, the rapidity, and the reliability of relaying protection but also has high fault tolerant capability. A simulation of 220 kV grid systems in Easter Hubei province showed the effectiveness of the wide-area protection system presented by this paper. © 2012 Universitas Ahmad Dahlan.

关键词： Computer architecture

来源：评论

学校读者我要写书评

暂无评论

The effect of power on duty cycle on the pulsed RF discharge and the pulsed RF plasma jet array

The effect of power on duty cycle on the pulsed RF discharge...

引用

IEEE International Conference on Plasma Science (ICOPS)

作者： D. W. Liu National State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology WuHan Hubei China

Summary form only given. Nowadays biomedical application of atmospheric pressure glow discharges (APGD) known as plasma medicine has received growing attention due to their economic and technological impact. Although RF plasma has high density of reactive specie, the gas temperature of hundreds degrees prevent its biomedical application. However, the pulsed RF plasma decreased the gas temperature to 310±10k by reducing RF power ontime. Although the different RF power on time leaded to the changing of pulsed RF plasma reactivity, our study suggested on the condition of the same RF power on time, the changing of pulse frequency and duty on cycle affected the peak current, optical emission intensity of the pulsed RF plasma. On the other hand, the parallel plate discharge has the advantage of large area processing, so the sterilization effect of the pulsed RF discharge was analyzed by putting a semipermeable membrane with E. Coli on the electrode. Finally, because plasma jet can provide plasma not spatially bound, by keeping the same power on duty cycle, the difference of propagation characteristics between the pulsed RF plasma jet array and the pulsed DC jet array are analyzed. The plasma plume structure of pulsed RF jet array is same as stable DC discharge, and the strong electric field leaded to growing plasma bullet in the launching period of the pulsed DC jet array. The reactivity of pulsed RF jet array is stronger than that of pulsed DC jet array.

关键词： Radio frequency Arrays Discharges (electric) Plasma temperature Physics electromagnetics

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：