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浏览/检索结果: 共18条，第1-10条 帮助

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On Efficient Second Order Stabilized Semi-implicit Schemes for the Cahn-Hilliard Phase-Field Equation 期刊论文  OAI收割
JOURNAL OF SCIENTIFIC COMPUTING, 2018, 卷号: 77, 期号: 2, 页码: 1185-1209
作者:  Wang, Lin;  Yu, Haijun
  |  收藏  |  浏览/下载：35/0  |  提交时间：2018/11/16
Incorporation of Efficient Second-Order Solvers Into Latent Factor Models for Accurate Prediction of Missing QoS Data 期刊论文  OAI收割
IEEE TRANSACTIONS ON CYBERNETICS, 2018, 卷号: 48, 期号: 4, 页码: 1216-1228
作者:  Luo, Xin;  Zhou, MengChu;  Li, Shuai;  Xia, Yunni;  You, Zhu-Hong
  |  收藏  |  浏览/下载：33/0  |  提交时间：2018/06/04
Sensory context influence on first-order orientation perception 会议论文  OAI收割
曲阜, 2017.7.1
作者:  Jinfeng Huanga;  Tzvetomir Tzvetanova;  Tzvetomir Tzvetanov
  |  收藏  |  浏览/下载：38/0  |  提交时间：2017/12/26
Adsorption characteristics of phosphorus onto soils from water level fluctuation zones of the danjiangkou reservoir 期刊论文  iSwitch采集
Clean-soil air water, 2016, 卷号: 44, 期号: 8, 页码: 975-983
作者:  Du, Chao;  Ren, Xianyou;  Zhang, Liang;  Xu, Meng;  Wang, Xiaojun
收藏  |  浏览/下载：51/0  |  提交时间：2019/05/09
Dynamics of Rabi model under second-order Born-Oppenheimer approximation 期刊论文  OAI收割
CHINESE PHYSICS B, 2013, 卷号: 22, 期号: 11
Wang, ZH; Zhou, DL
收藏  |  浏览/下载：29/0  |  提交时间：2014/01/16
Design of thermostat system based on Proteus simulation software (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
Han Z.; Song K.
收藏  |  浏览/下载：43/0  |  提交时间：2013/03/25
In order to solve the problem of precise temperature control  the thermoelectric cooler (TEC) principle widely used is analyzed for the design of the whole control process and selection of control parameters  and then accurate simulation model of the TEC is established in Proteus simulation software. Moreover  combined with the traditional circuit simulation model  the temperature control loop is designed  and the response characteristics of the system are tested using an input signal similar to the unit-step function to achieve the precise temperature control. Simulation results show that the proposed control circuits can precisely convert error signal to output voltage sent to TEC model  and TEC model behaves approximately like a two-pole system. The first pole starts at 20mHz and a second pole at 1Hz. 2011 IEEE.  
Design of motion compensation mechanism of satellite remote sensing camera (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
Gu S.; Yan Y.; Xu K.; Jin G.
收藏  |  浏览/下载：49/0  |  提交时间：2013/03/25
With the development of aerospace remote sensing technology  the ground resolution of remote sensing camera enhances continuously. Since there is relative motion between camera and ground target when taking pictures  the target image recorded in recording media is moved and blurred. In order to enhance the imaging quality and resolution of the camera  the image motion had to be compensated. In order to abate the effect of image motion to image quality of space camera and improve the resolution of the camera  the compensation method of image motion to space camera is researched. First  the reason of producing drift angle and adjustment principle are analyzed in this paper. This paper introduce the composition and transmission principle of image motion compensation mechanism. Second  the system adopts 80C31 as controller of drift angle  and adopts stepping motor for actuators  and adopts absolute photoelectric encoder as the drift Angle measuring element. Then the control mathematical model of the image motion compensation mechanism are deduced  and it achieve the closed-loop control of the drift angle position. At the last  this paper analyses the transmission precision of the mechanism. Through the experiment  we measured the actual precision of the image motion compensation mechanism  and compared with the theoretical analysis. There are two major contributions in this paper. First  the traditional image motion compensation mechanism is big volume and quality heavy. This has not fit for the development trend of space camera miniaturization and lightweight. But if reduce the volume and quality of mechanism  it will bring adverse effects for the precision and stiffness of mechanism. For this problem  This paper designed a image motion compensation that have some advantages such as small size  light weight at the same time  high precision  stiffness and so on. This image motion compensation can be applicable to the small optics cameras with high resolution. Second  the traditional mechanism control need to corrected  fitting and iterative for the control formula of mechanism. Only in this way  we can get the optimal control mathematical model. This paper has high precision of the control formula derived. It can achieve the high precision control without fitting  It also simplify the difficulty of control mathematical model establishment. This paper designed the range of adjusting of image motion compensation mechanism between -5 +5. Based on choosing-5  -4  -3  -2  -1  0  +1  +2  +3  +4  +4 as the expectation value of the imaginary drift angle  we get ten groups of the fact data in adjusting drift angle measured. The test results show that the precision of the drift angle control system can be achieved in 1. It can meet the system requirements that the precision of the control system is less than 3'  and it can achieve the high-precision image motion compensation. 2011 SPIE.  
Visual responses to contrast-defined contours with equally spatial-scaled carrier in cat area 18 期刊论文  OAI收割
BRAIN RESEARCH BULLETIN, 2011, 卷号: 86, 期号: 1-2, 页码: 97-105
Gou, Bin; Li, Yuhui; Li, Bing; 李兵
收藏  |  浏览/下载：18/0  |  提交时间：2013/12/25
Dynamic nonlinear transformation algorithm in LED display panel (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Computational Intelligence and Natural Computing, CINC 2010, September 13, 2010 - September 14, 2010, Wuhan, China
Chang F.; Zheng X.-F.; Wang R.-G.; Ding T.-F.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
In order to ensure high quality display results of LED display panel in all kinds of ambient brightness  a dynamic nonlinear transformation algorithm is proposed. First  the implementation processes of the method of lock-up table nonlinear transformation are described  which is the traditional method of nonlinear transformation. Second  an algorithm model of dynamic nonlinear transformation is constructed Third  the algorithm realization steps are discussed on the basis of the constructed algorithm model. Finally  the relationship between the coefficient of nonlinear transformation and ambient brightness is analyzed. Experimental results indicate  regardless of ambient brightness this algorithm is able to ensure that the contrast of LED display panel does not decrease  so the display results of LED display panel is good. 2010 IEEE.  
Age-related decline of contrast sensitivity for second-order stimuli: Earlier onset, but slower progression, than for first-order stimuli 期刊论文  OAI收割
JOURNAL OF VISION, 2009, 卷号: 9, 期号: 7, 页码: -
Tang, Yong; zhou, yifeng; 周逸峰
收藏  |  浏览/下载：16/0  |  提交时间：2013/12/25