中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共8条，第1-8条

帮助

条数/页：排序方式：
	A downscaling framework with WRF-UCM and LES/RANS models for urban microclimate simulation strategy: Validation through both measurement and mechanism model 期刊论文 OAI收割 BUILDING AND ENVIRONMENT, 2025, 卷号: 269, 页码: 13 作者: Liu, Jiawen; Gao, Huan; Jia, Ruoyu; Wang, Ran; Han, Dongrui \| 收藏 \| 浏览/下载：7/0 \| 提交时间：2025/03/03 Urban microclimate simulation One-way downscaling method WRF-UCM model ENVI-met PALM-4U The two-resistance mechanism (TRM) model
	Exploring New Mechanisms for Demand-Side Platforms in Real Time Bidding Markets 会议论文 OAI收割 Jinan, China, Oct. 20-22, 2017 作者: Qin, Rui; Yuan, Yong; Ni, Xiaochun; Wang, Fei-Yue \| 收藏 \| 浏览/下载：49/0 \| 提交时间：2017/12/29 Real Time Bidding Two-stage Resale Model Demand Side Platform Pricing Mechanism Bidding Mechanism
	关键字营销中若干博弈问题研究学位论文 OAI收割工学博士, 中国科学院自动化研究所: 中国科学院研究生院, 2011 作者: 李林静收藏 \| 浏览/下载：54/0 \| 提交时间：2015/09/02 关键字拍卖 GSP机制线性机制设计稳定均衡无风险对称均衡预算分配二维Newsboy模型 Keyword Auction Generalized Second-price Mechanism Linear Mechanism Designing Stable Nash Equilibrium Risk-free Symmetrical Nash Equilibrium Budget Allocation Two-dimensional Newsboy Model
	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：48/0 \| 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.
	The new approach for infrared target tracking based on the particle filter algorithm (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: Sun H.; Han H.-X.; Sun H. 收藏 \| 浏览/下载：60/0 \| 提交时间：2013/03/25 Target tracking on the complex background in the infrared image sequence is hot research field. It provides the important basis in some fields such as video monitoring precision and video compression human-computer interaction. As a typical algorithms in the target tracking framework based on filtering and data connection the particle filter with non-parameter estimation characteristic have ability to deal with nonlinear and non-Gaussian problems so it were widely used. There are various forms of density in the particle filter algorithm to make it valid when target occlusion occurred or recover tracking back from failure in track procedure but in order to capture the change of the state space it need a certain amount of particles to ensure samples is enough and this number will increase in accompany with dimension and increase exponentially this led to the increased amount of calculation is presented. In this paper particle filter algorithm and the Mean shift will be combined. Aiming at deficiencies of the classic mean shift Tracking algorithm easily trapped into local minima and Unable to get global optimal under the complex background. From these two perspectives that "adaptive multiple information fusion" and "with particle filter framework combining" we expand the classic Mean Shift tracking framework.Based on the previous perspective we proposed an improved Mean Shift infrared target tracking algorithm based on multiple information fusion. In the analysis of the infrared characteristics of target basis Algorithm firstly extracted target gray and edge character and Proposed to guide the above two characteristics by the moving of the target information thus we can get new sports guide grayscale characteristics and motion guide border feature. Then proposes a new adaptive fusion mechanism used these two new information adaptive to integrate into the Mean Shift tracking framework. Finally we designed a kind of automatic target model updating strategy to further improve tracking performance. Experimental results show that this algorithm can compensate shortcoming of the particle filter has too much computation and can effectively overcome the fault that mean shift is easy to fall into local extreme value instead of global maximum value.Last because of the gray and fusion target motion information this approach also inhibit interference from the background ultimately improve the stability and the real-time of the target track. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
	Electron paramagnetic resonance parameters of Mn4+ ion in h-BaTiO3 crystal from a two-mechanism model 期刊论文 OAI收割 PRAMANA-JOURNAL OF PHYSICS, 2009, 卷号: 72, 期号: 3, 页码: 569-575 作者: Wu Xiao-Xuan; Fang Wang; Feng Wen-Lin; Zheng Wen-Chen \| 收藏 \| 浏览/下载：11/0 \| 提交时间：2021/02/02 Electron paramagnetic resonance two-mechanism model defect structure Mn4+ h-BaTiO3
	Electron paramagnetic resonance parameters of Mn(4+) ion in h-BaTiO(3) crystal from a two-mechanism model 期刊论文 OAI收割 Pramana-Journal of Physics, 2009, 卷号: 72, 期号: 3, 页码: 569-575 X. X. Wu; W. Fang; W. L. Feng; W. C. Zheng 收藏 \| 浏览/下载：24/0 \| 提交时间：2012/04/13 Electron paramagnetic resonance two-mechanism model defect structure Mn(4+) h-BaTiO(3) atomic screening constants scf functions luminescence impurities spectrum
	Anti-stokes fluorescent cooling by energy transfer (EI CONFERENCE) 会议论文 OAI收割作者: Zhang J.; Wang Y.; Wang Y.; Wang Y.; Wang Y. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 A new model on the mechanism of anti-Stokes fluorescent cooling is proposed based on which incident laser induces a phonon-assisted energy transfer from one luminescent center to another in an optical medium and causes medium cooling when the energy transfer is an anti-Stokes process and absorbs phonons. Here we develop the model in two cases: two-phonon-assisted energy transfer for a small energy mismatch and one-phonon-assisted energy transfer for a large energy mismatch. The dependence of relative cooling efficiency on photon energy and temperature is also discussed in evaluating the new mechanism. 2006 Elsevier B.V. All rights reserved.