中国科学院机构知识库网格系统: 检索

Efficient planar perovskite solar cells with large fill factor and excellent stability 期刊论文 OAI收割
JOURNAL OF POWER SOURCES, 2015, 卷号: 297, 页码: 53-58
作者: Bao, Xichang; Wang, Yujin; Zhu, Qianqian; Wang, Ning; Zhu, Dangqiang

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Planar perovskite solar cells High-quality films Fill factor Stability Degradation mechanism

The application of adaptive enhancement algorithm based on gray entropy in mammary gland CR image (EI CONFERENCE) 会议论文 OAI收割
2012 2nd International Conference on Consumer Electronics, Communications and Networks, CECNet 2012, April 21, 2012 - April 23, 2012, Three Gorges, China
Zhang M.-H.; Zhang Y.-Y.

收藏 | 浏览/下载：34/0 | 提交时间：2013/03/25

Mammary gland is composed entirely of soft tissue with approximate density therefore mammary gland CR medicine radiation image presents a low contrast and slight difference changes may be a manifestation of tumor so it is necessary to enhance mammary gland CR image to improve its visual quality in order to meet the demands of doctor's clinical diagnosis. However the general enhancement algorithms over enhance the contrast and noise due to image details lost aiming at the defects a mammary gland CR medicine image adaptive enhancement arithmetic based on image gray entropy is put forward. The arithmetic adapts dizzy image to magnify selected spatial frequency response in order to enhance the edge details of mammary gland CR images. It can adjust weighted factor K according to image gray characteristics namely pixel gray entropy. Experiments results demonstrate that mammary gland CR image enhanced by the algorithm has abundant details and high signal-to-noise ratio moreover CR image enhanced has good visual effect. So the method is effective and fit for enhancing CR medical radiation image edge details. 2012 IEEE.

Electrically pumped organic laser device with a coupled microcavity structure (EI CONFERENCE) 会议论文 OAI收割
Organic Light Emitting Materials and Devices XVI, August 12, 2012 - August 15, 2012, San Diego, CA, United states
作者: Li Y.; Li Y.; Li Y.; Li Y.; Lin J.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

Lasing action in electrically pumped organic laser device is demonstrated. A DCM laser dye doped Alq film serves as the active layer. High reflective and low loss electrical contacts are used to form a high quality factor coupled microcavity. Single longitudinal cavity mode is obtained at 618 nm with a threshold current density of 612 mAcm-2 under room temperature continuous wave operation. 2012 SPIE.

The research of digltal CR medicine image adapitive enhancement method (EI CONFERENCE) 会议论文 OAI收割
4th International Conference on Mechanical and Electrical Technology, ICMET 2012, July 24, 2012 - July 26, 2012, Kuala Lumpur, Malaysia
Ming-Hui Z.; Yao-Yu Z.

收藏 | 浏览/下载：67/0 | 提交时间：2013/03/25

Digital CR medicine radiation image is in doctor's favor and has became medicine imaging technology new hot spot because of its high gray contrast powerful computer disposal function little radiation dosage non-film diagnosis different area consultation. But degradation of digital X-ray medical image such as low contrast and blurring during radiographic imaging caused by complexity of body tissue and effects of X-ray scattering and electrical noise etc. can worsen the results of analysis and diagnosis. So it is usually needed that CR medicine image is enhanced to improve its vision quality and easy to doctor's more accurate diagnosis. The general enhancement algorithms over enhancing the contrast and lose image details aiming at the defects an enhancement algorithm for CR image is proposed based on the ratio of deviation to mean of domain. The arithmetic enhance CR image edge details by adjusting factor K based on the ratio of deviation to mean of domain of CR image. Experiment results demonstrate that the algorithm enhances CR image detail and CR image enhanced has good visual effect the adaptive enhancement method is fit for CR medicine image. (2012) Trans Tech Publications Switzerland.

High beam quality 400W practical all-solid-state laser for laser beam texture 会议论文 OAI收割
High-Power Lasers and Applications V, Beijing, China, October 18, 2010 - October 19, 2010
作者: Geng AC(耿爱丛); Yang MJ(杨明江); Zhao C; Li BH

收藏 | 浏览/下载：25/0 | 提交时间：2017/06/20

1064 nm All solid-state lasers Beam quality factor Birefringence compensation High beam quality Low concentrations Nd:YAG crystal Nd:YAG laser Optical conversion efficiency Output power Pump power Side-pumped Unstable resonators

Calculation of the external quality factor of the high power input coupler for the BEPC II superconducting cavity 期刊论文 OAI收割
CHINESE PHYSICS C, 2008, 卷号: 32, 期号: 1, 页码: #REF!
作者: Huang TM(黄彤明); Pan WM(潘卫民)

收藏 | 浏览/下载：20/0 | 提交时间：2016/04/12

high power input coupler external quality factor superconducting cavity

Calculation of the external quality factor of the high power input coupler for the BEPCII superconducting cavity 期刊论文 OAI收割
中国物理C, 2008, 期号: 1, 页码: 72-74
作者: Huang TM(黄彤明); Pan WM(潘卫民); Wang GW(王光伟); T.Furuya; S.Mitsunobu

收藏 | 浏览/下载：22/0 | 提交时间：2015/12/14

high power input coupler external quality factor superconducting cavity

Seismic amplitude tomography for crustal attenuation beneath China 期刊论文 OAI收割
GEOPHYSICAL JOURNAL INTERNATIONAL, 2008, 卷号: 174, 期号: 1, 页码: 223-234
作者: Pei SP(裴顺平)

收藏 | 浏览/下载：20/0 | 提交时间：2010/05/11

LG CODA-Q HIGH-PRESSURE ROCKS SURROUNDING REGIONS VELOCITY STRUCTURE NORTH CHINA WAVE-PROPAGATION QUALITY FACTOR UPPER-MANTLE EVOLUTION EXHUMATION

The Bangong Lake ophiolite (NW Tibet) and its bearing on the tectonic evolution of the Bangong-Nujiang suture zone 期刊论文 OAI收割
JOURNAL OF ASIAN EARTH SCIENCES, 2008, 卷号: 32, 期号: 5-6, 页码: 438-457
作者: Shi RD(史仁灯)

收藏 | 浏览/下载：27/0 | 提交时间：2010/05/11

LG CODA-Q HIGH-PRESSURE ROCKS SURROUNDING REGIONS VELOCITY STRUCTURE NORTH CHINA WAVE-PROPAGATION QUALITY FACTOR UPPER-MANTLE EVOLUTION EXHUMATION

Key techniques of laser direct writing of fine lines on the spherical surface (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China
Liang F.; Hu J.

收藏 | 浏览/下载：21/0 | 提交时间：2013/03/25

The main principles of laser direct writing (LDW) system for lines on the spherical surface (SS) are discussed. It is pointed out that line profile is determined by the exposure dose distribution which lies on the light intensity distribution of focus plane and the scanning speed. To improve the quality of line profile on the SS several key techniques as follows are introduced. Firstly the unique system configuration four axes mutually intersecting at the center of the SS is adopted which ensures the shape of the focus be maintained circular during the writing period. Secondly an automatic focus system (AFS) with the function of automatic focus in a certain range is introduced. Thirdly to guarantee the linear velocity to accord with the exposure character of the photoresist all the time an efficient arithmetic that controls motors run at appropriate angular velocity in different latitude is developed. Finally to achieve a stable and well-behaved system so as to compensate the velocity instability resulting from unavoidable errors of mechanical and electronics factor a powerful programmable multi-axis controller (PMAC) is utilized as the kernel element of the servocontrol system and the curves of step response and parabolic response achieved by feedforward and PID loop tuning indicate that the location precision and velocity stability have reached a high level. The experimental results of LDW of lines on the SS work piece with a diameter 30 mm and a radius equal to 100 mm are given. The section analysis of the lines on the photoresist by the atomic force microscope (AFM) after exposure and development is performed. The results show that line width is about 3.0 m and the steep sides of the lines are parallel to each other.