中国科学院机构知识库网格系统: 检索

An estimation model for the fragmentation properties of brittle rock block due to the impacts against an obstruction 期刊论文 OAI收割
Journal of Mountain Science, 2017, 卷号: 14, 期号: 6, 页码: 1161-1173
作者: HOU Tian-xing; XU Qiang; XIE Hong-qiang; XU Nu-wen; ZHOU Jia-wen

|

收藏 | 浏览/下载：21/0 | 提交时间：2017/06/21

Rock Block Rock Fragmentation Rock Movement Process Crushing Work Ratio Average Fragment Size

Development and radiance calibration of three-waveband camera (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photonics and Optoelectronics, SOPO 2010, June 19, 2010 - June 21, 2010, Chengdu, China
作者: Wang J.; Liu Y.; Liu Y.; Sun Q.; Liu Y.

收藏 | 浏览/下载：28/0 | 提交时间：2013/03/25

An imaging system with three-waveband sharing one lens and an area CCD was developed. By rotating different filters into the beam path the required waveband was selected. The optical system which can image in ultraviolet visible and near infrared region was designed and the signal collecting system was integrated. The optical design and system integration have some advantages such as low cost small size and light in weight. To obtain a high imaging quality the radiation calibration is carried out in order to establish the relation between the average grey level of output image and the input radiance from the integrating sphere. According to the calibration data in experiments the radiation dynamic range and the best working point of the system are determined. The experiment result shows that the dynamic range of the image system is maximal when the exposure time is 8ms in ultraviolet 0.5ms in visible and 0.125ms in near infrared region. 2010 IEEE.

Monte Carlo Simulation Study on Scaling Behavior in Growth of Antibody-antigen Complexes 期刊论文 OAI收割
Chemical Journal of Chinese Universities-Chinese, 2010, 卷号: 31, 期号: 5, 页码: 1045-1050
H. J. Wang; P. Zhang; X. W. Ba

收藏 | 浏览/下载：23/0 | 提交时间：2012/04/13

Antibody-antigen complex Scaling behavior Sol-gel phase transition Monte Carlo simulation randomly branched polymers average molecular-weights probability-theory immune-complexes viscoelasticity aggregation evolution binding ligands size

Preparation of Cr2O3 nanoparticles via C2H5OH hydrothermal reduction 期刊论文 OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 卷号: 468, 期号: 1-2, 页码: L5-L8
作者: Pei, Zhenzhao; Xu, Hongbin; Zhang, Yi

收藏 | 浏览/下载：16/0 | 提交时间：2013/12/11

Nanoparticles Hydrothermal synthesis Cr2O3 Average particle size Specific surface area

Synthesis and characterization of CoFe2O4 magnetic particles prepared by co-precipitation method: Effect of mixture procedures of initial solution 期刊论文 OAI收割
JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 卷号: 450, 期号: 1-2, 页码: 532-539
作者: Wang, Jing; Deng, Tong; Lin, Wong; Yang, Caiqin; Zhan, Wenhong

收藏 | 浏览/下载：40/0 | 提交时间：2013/10/08

CoFe2O4 Mossbauer average size X-ray diffraction magnetic measurement

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：23/0 | 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：30/0 | 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.

电刷镀镍/碳纳米管复合纳米镀层的结构与耐磨性能 期刊论文 OAI收割
稀有金属材料与工程, 2006, 卷号: 35, 期号: 10, 页码: 1643-1646
作者: 陈建敏; 周惠娣; 冶银平

收藏 | 浏览/下载：25/0 | 提交时间：2014/03/03

电刷镀镍/碳纳米管复合纳米镀层平均晶粒尺寸耐磨性 electro-brush plating Ni/carbon nanotube composite nanocoatings average grain size antiwear

电刷镀镍/炭纳米管复合纳米镀层的结构与耐磨性能 期刊论文 OAI收割
稀有金属材料与工程, 2006, 卷号: 35, 期号: 10, 页码: 1643-1646
作者: 周惠娣; 冶银平; 陈建敏

收藏 | 浏览/下载：34/0 | 提交时间：2013/11/04

电刷镀镍/碳纳米管复合纳米镀层平均晶粒尺寸耐磨性 electro-brush plating Ni/carbon nanotube composite nanocoatings average grain size antiwear

电刷镀镍/碳纳米管复合纳米镀层的结构与磨损性能 期刊论文 OAI收割
润滑与密封, 2006, 期号: 7, 页码: 2-4
作者: 冶银平; 周惠娣; 陈建敏

收藏 | 浏览/下载：36/0 | 提交时间：2014/03/03

电刷镀镍/碳纳米管复合纳米镀层平均晶粒尺寸抗磨性能 electro-brush plating Ni/carbon nanotube composite nanocoatings average grain size antiwear behaviour