中国科学院机构知识库网格系统: 检索

Investigation of electrochemical chloride removal from concrete using direct and pulse current 期刊论文 OAI收割
CONSTRUCTION AND BUILDING MATERIALS, 2021, 卷号: 270, 页码: 9
作者: Fang, Yunpeng; Du, Keqin; Guo, Quanzhong; Feng, Qiuping; Li, Dongyun

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收藏 | 浏览/下载：78/0 | 提交时间：2021/03/15

Pulse current Electrochemical chloride removal Concrete Potential distribution Current density

Prediction of steel corrosion in magnesium cement concrete based on two dimensional Copula function 期刊论文 OAI收割
COMPUTERS AND CONCRETE, 2018, 卷号: 21, 期号: 2, 页码: 181-187
作者: Feng, Qiong; Qiao, Hongxia; Wang, Penghui; Gong, Wei

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收藏 | 浏览/下载：33/0 | 提交时间：2018/06/20

Corrosion Current Density Marginal Distribution Function Joint Distribution Function Frank-copula Function Life Prediction

Stable Li Metal Anodes via Regulating Lithium Plating/Stripping in Vertically Aligned Microchannels 期刊论文 OAI收割
ADVANCED MATERIALS, 2017, 卷号: 29, 期号: 40
作者: Wang, Shu-Hua; Yin, Ya-Xia; Zuo, Tong-Tong; Dong, Wei; Li, Jin-Yi

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收藏 | 浏览/下载：102/0 | 提交时间：2018/04/25

Current Density Distribution Dendrites Suppressing Electrodeposition Lithium Metal Anodes Tip Effect

A three-dimensional model for negative half cell of the vanadium redox flow battery 期刊论文 OAI收割
electrochimica acta, 2011, 卷号: 58, 期号: 待补充, 页码: 238-246
作者: Ma, Xiangkun; Zhang, Huamin; Xing, Feng

收藏 | 浏览/下载：113/0 | 提交时间：2012/07/09

Vanadium redox battery Three-dimensional model Transfer current density distribution Overpotential distribution

Boundary Element Method (BEM) Analysis for Galvanic Corrosion of Hot Dip Galvanized Steel Immersed in Seawater 期刊论文 OAI收割
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2009, 卷号: 25, 期号: 2, 页码: 194-198
作者: Tang, Xiao; Zhang, Yuzhi; Liu, Meng; Li, Yan

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收藏 | 浏览/下载：25/0 | 提交时间：2010/12/21

Galvanic Corrosion Bem Hydrogen Absorption Potential Distribution Current Density Distribution

A novel bottom-emitting vcsel's one-dimension array (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China
作者: Wang L.; Wang L.; Wang L.; Liu Y.; Liu Y.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

A novel 980nm bottom-emitting VCSELs array with high power density and good beam property of Gaussian far-field distribution is reported. This array is composed of 5 symmetrically-arranged elements of 200m 150m and 100m-diameter with the center spacings of 300m and 250m respectively. The maximum power is 880mW at a current of 4A corresponding to lKW/cm2 average optical power density. The differential resistance is 0.09 with a threshold of 0.56A. The novel array is compared with a 300m-aperture-size single device and a 44 2-D array with 50m element aperture size and 250m centre spacing. The three devices have the same lasing area. The conclusion is that the novel array is better in the property of output power threshold current lasing spectra far-field distribution etc. 2008 SPIE.

The synthesis and field emission property of carbon nanotubes on carbon fibers substrate (EI CONFERENCE) 会议论文 OAI收割
Technical Digest of the 20th International Vacuum Nanoelectronics Conference, IVNC 07, July 8, 2008 - July 12, 2008, Chicago, IL, United states
Leyong Z.; Weibiao W.; Jingqiu L.; Yuxue X.; Da L.; Song C.; Haifeng Z.

收藏 | 浏览/下载：33/0 | 提交时间：2013/03/25

Using ferrocene as catalyst precursor C2H2 as carbon source carbon nanotubes (CNTs) with uniform density were synthesized on carbon fibers substrate by floating catalyst method. The morphology and microstructure were characterized by field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM). The observation showed that the length of CNTs is about 2 m the average space between adjacent CNTs is about 300 nm and the diameter of CNT is about 45 nm. The less dense "short and stubby" aligned CNTs films should have good electron field emission characteristics. The results of field emission showed that the emission current of CNTs/carbon fibers was 5 A at the field of 2.5 V/m and the emission current can be 280 A with a field of 7 V/m (the specimen area is 0.25 cm2 and the distance between cathode and anode is 200 m). The calculation based on the F-N plot indicated that the field enhancement factor of CNTs tip is 499122. Using the conductivity and chemical stability of carbon fibers and the uniform and sparse density distribution of CNTs on carbon fibers substrate the tip predominance of carbon nanotubes can be exerted and simultaneously the effect of screening effects between adjacent carbon nanotubes on the field emission performance can also be effectively decreased. The CNTs synthesized on carbon fibers substrate has many predominances for the fabrication of cold cathode devices. For example using the removability of carbon fibers the cathode of CNTs/carbon fibers can be arbitrarily moved enlaced or combined to form different patterns and the cathode of CNTs/carbon fibers can be also fabricated in large size. Therefore CNTs/carbon fibers may have potential application in field emission displays.

Step-like field magnets to transform beam distribution at the CSNS target 期刊论文 OAI收割
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2007, 卷号: 582, 期号: 2, 页码: 326-335
作者: Tang JY(唐靖宇); Wei GH(魏国辉); Zhang C(张闯); Tang, JY; Wei, GH

收藏 | 浏览/下载：16/0 | 提交时间：2016/06/27

step-like field magnets beam distribution maximum current density Kicker misfiring beam spot stability

Fabrication and electron emission of carbon microtubes (EI CONFERENCE) 会议论文 OAI收割
Technical Digest of the 18th International Vacuum Nanoelectronics Conference, IVNC 2005, July 10, 2005 - July 14, 2005, Oxford, United kingdom
作者: Liu L.; Liu L.; Wang W.; Wang W.

收藏 | 浏览/下载：40/0 | 提交时间：2013/03/25

Carbon nanotubes have been attracting attention because of their unique physical properties and their application potential for field emission cathode. Carbon nanotubes possess the following properties favorable for field emission material such as a high aspect ratio and sharp tip high chemical stability high mechanical strength stable at high temperature. Some research works on carbon nanotubes field emitter and field emission display have been reported. Here a kind of carbon microtubes and its field emission properties are introduced. They have some different properties with carbon nanotubes and the density is lower than carbon nanotubes bundles. These carbon microtubes are directly synthesized by liquidoid epitaxy method on silicon substrates at low temperature. The field emission properties of carbon microtubes are reported too. Carbon microtubes film is synthesized in liquid by electrolysis. The graphite plate is as anode and n-silicon substrate with resistivity of 4-8 cm is as cathode. The electrolysis current is about 5-8mA/cm2 and applied voltage is 800-1500V. Temperatures of the methanol base solution is maintained at 60C in process of deposition of carbon microtubes. Carbon microtubes film is observed by scanning electron microscopy(SEM) as shown in fig.1(a b). The wall's thickness of carbon microtube is about 60nm. The diameter of carbon microtube is about 0.8 m. Raman spectrum of carbon microtubes film shows the two peaks at 1342and 1560cm-1. The field emission properties of carbon microtubes are measured in high vacuum chamber(10-5Pa). The emission area of carbon microtubes is 0.5cm 0.5cm. The threshold of field emission of the carbon microtubes film is about 3.6V/ m. Field emission property of carbon microtubes film is shown in fig.2. Another when the electric field between anode and cathode is 10V/ m the electric field distribution on single carbon microtube is also given after calculation according to electric field theory. Fig 3 shows that electric field distribution vertical section on the of single carbon microtube top with 2 m of highness. These results may help us to understand field emission properties of carbon microtubes. According to research results it is found that liquidoid synthesis is simple method to produce carbon microtubes cold cathode material and the carbon microtubes have better field emission properties. 2005 IEEE.

The influence of intergrowth phase in Hg-1223 superconductors under high pressure 期刊论文 OAI收割
PHYSICS LETTERS A, 2004, 卷号: 329, 期号: 1-24-5, 页码: 385
Liu, SL; Wu, GJ; Xu, XB; Wu, J; Shao, HM; Han, CY

收藏 | 浏览/下载：15/0 | 提交时间：2013/09/23

TRANSITION-TEMPERATURE HGBA2CA2CU3O8+DELTA SUPERCONDUCTOR CHARGE-DISTRIBUTION T-C HG-2212 SUPERCONDUCTOR CURRENT-DENSITY DEPENDENCE ENHANCEMENT HGBA2CACU2O6+DELTA T(C)