中国科学院机构知识库网格系统: 检索

Numerical Analysis of Perforation during Hydraulic Fracture Initiation Based on Continuous-Discontinuous Element Method 期刊论文 OAI收割
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES, 2024, 卷号: 140, 期号: 2, 页码: 2103-2129
作者: Zhang, Rui; Wang LX(王理想); Li, Jing; Feng C(冯春); Zhang, Yiming

|

收藏 | 浏览/下载：10/0 | 提交时间：2024/07/04

Hydraulic fracturing real perforation shape breakdown pressure perforation layout design CDEM

Sustainable Lifecycle Management for Automotive Development via Multi-Dimensional Circular Design Framework 期刊论文 OAI收割
IEEE TRANSACTIONS ON INTELLIGENT VEHICLES, 2023, 卷号: 8, 期号: 9, 页码: 4151-4154
作者: Zhang, Yongkang; Chen, Jicheng; Teng, Siyu; Zhang, Hui; Wang, Fei-Yue

|

收藏 | 浏览/下载：15/0 | 提交时间：2023/12/21

Intelligent vehicles Sustainable development Recycling Intelligent control Energy consumption Roads Layout Sustainability intelligent vehicles vehicle lifecycle management energy efficiency circular design

Looking for an optimal pedal layout to improve the driving performance of patients with diabetic peripheral neuropathy 期刊论文 OAI收割
APPLIED ERGONOMICS, 2019, 卷号: 80, 页码: 43-49
作者: Ma, Shu; Wu, Changxu; Zhang, Jingyu; Zeng, Xianzhong; Zhao, Guozhen

|

收藏 | 浏览/下载：66/0 | 提交时间：2019/06/17

Drivers with type 2 diabetes Braking behavior Diabetic peripheral neuropathy Pedal layout design

Dynamic disturbance force measurement platform for large moving device in spacecraft 期刊论文 OAI收割
Journal of Sound and Vibration, 2019, 卷号: 447, 页码: 61-77
作者: M.Y.Xia; Z.B.Xu; K.Han; Q.Huo; A.Li

|

收藏 | 浏览/下载：22/0 | 提交时间：2020/08/24

Space telescope,Generalized force,Micro-vibration,Redundant layout,Finite element analysis,Dynamic calibration,force/torque sensor,stewart platform,optimal-design,optimization,Acoustics,Engineering,Mechanics

Particle tracking simulation. in the CSRe stochastic cooling system 期刊论文 OAI收割
CHINESE PHYSICS C, 2015, 卷号: 39, 页码: 8
作者: Hu Xue-Jing; Jia Huan; Zhang Xiao-Hu; Wu Jun-Xia; Yuan You-Jin

|

收藏 | 浏览/下载：16/0 | 提交时间：2018/05/31

stochastic cooling optical layout design particle tracking cooling rate

Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China
作者: Zhang X.; Zhang X.; Zhang X.

收藏 | 浏览/下载：36/0 | 提交时间：2013/03/25

A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations while low dispersion lenses were used in the reimaging system so the optical system do not need achromatic design for a high image quality. Then to correct high-order aberrations resulting from large relative aperture more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here aspheric is selected for easily manufacture. Finally the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Design of high-speed low-noise pre-amplifier for CCD camera (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang S.

收藏 | 浏览/下载：31/0 | 提交时间：2013/03/25

Pre-amplifier circuit is critical for the noise performance of the high speed CCD camera. Its main functions are amplification and impedance transform. The high speed and low noise pre-amplifier of CCD camera is discussed and designed in this paper. The high speed and low noise operational amplifier OPA842 is adopted as the main part. The gain-set resistors for the amplifier are designed optimally. The different precision gain-set resistors are swept using Monte Carlo method. CCD video signal which has high DC offset voltage is AC coupled to the amplifier. The output signal of the amplifier is source terminated using 50 ohms matching resistor so as to transmit the video signal through coaxial cable. When the circuit works in high speed the PCB will have important effect to circuit performance and can even cause the amplifier unstable due to the parasitic problem of PCB. So the parasitic model of the PCB is established and the PCB layout design issues are also presented. The design result shows that the pre-amplifier can be used in the camera whose pixel rate could be up to 40 MHz and its input referred noise density is about 3 nV/Hz 1/2. 2010 Copyright SPIE - The International Society for Optical Engineering.

Inhibition of electromagnetic interference in control system based on DSP of high-power TEA CO2 laser (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Meng F.-J.; Guo L.-H.; Wang H.-Q.

收藏 | 浏览/下载：41/0 | 提交时间：2013/03/25

The strong electromagnetic interference (EMI) generated in high-power TEA C02 laser system mainly comes from main discharge circuit pulse spark switch and power supply. Such strong EMI causes great damage and interference to the control system based on DSP. In this paper we present the interference sources and their distribution and propose the methods of anti-interference. Measures for hardware design include weakening transient ground potential difference by using equipotential lines between devices using signal isolation interface to inhibit the transient ground potential interference and rational layout shielding and filtering to the control system. And methods for software design include range-limited filter self-diagnosis and self-repair for the critical data and anti-interference during abnormal reset. The EMI has been inhibited effectively by the anti-interference method proposed above. The result shows that: the software anti-interference method is as important as the hardware anti-interference method for the control system in a complex environment of strong EMI. 2010 IEEE.

生态校园规划设计研究与应用 学位论文 OAI收割
硕士, 北京: 中国科学院研究生院, 2009
王一钧

收藏 | 浏览/下载：98/0 | 提交时间：2010/06/30

生态校园规划设计应用 eco-campus layout design application

Design and tolerance analysis of compensator for high order aspheric surface testing (EI CONFERENCE) 会议论文 OAI收割
2009 International Conference on Optical Instruments and Technology - Optoelectronic Measurement Technology and Systems, October 19, 2009 - October 22, 2009, Shanghai, China
作者: Chen X.; Liu W.; Chen X.; Chen X.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

High accuracy is required in surface testing of 90nm nodal point lithography projecting lens. By comparing various aspheric surface testing methods the structure layout of the compensator is a meniscus positive lens combined with a Plano-convex positive lens. The design results indicate that: primary and high order aberrations are balanced well we adopt Offner null compensator to test the aspheric surface in the point diffraction interferometer at last. In this paper MTF exceeds diffraction limit an Offner compensator is presented on the base of the third order aberration theory to test concave aspheric surface root-mean-square (RMS) of wave front error /167. The F-number of the system can achieve F/1.64. By the analysis of the process of aspheric surface testing with the designed system the optical construction parameters of which is determined by introducing equal-quantities spherical aberration to compensate all orders of aspheric coefficients. The field of view of the system is 0.02 a loosen distribution of the tolerance was presented based on the accuracy of measuring apparatus. 2009 SPIE.