中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共6条，第1-6条

帮助

条数/页：排序方式：
	不同沙漠生境三种荒漠植物种内种子萌发差异及作用机制学位论文 OAI收割北京: 中国科学院大学, 2019 作者: 刘有军 \| 收藏 \| 浏览/下载：82/0 \| 提交时间：2021/12/10 种内种子萌发差异荒漠植物变化机制不同沙漠生境种皮纹饰 Intraspecific difference in seed germination desert plant variation mechanism of intraspcific seed germination different desert environments seed coat sculpture
	Human fall detection using normalized shape aspect ratio 期刊论文 OAI收割 MULTIMEDIA TOOLS AND APPLICATIONS, 2019, 卷号: 78, 期号: 11, 页码: 14331-14353 作者: Min, Weidong; Zou, Song; Li, Jing \| 收藏 \| 浏览/下载：63/0 \| 提交时间：2019/12/16 Human fall detection Falling toward different directions Indoor and outdoor environments Normalized shape aspect ratio
	Synthesis and luminescence properties of Eu3+-doped silicate nanomaterial (EI CONFERENCE) 会议论文 OAI收割 17th International Conference on Dynamical Processes in Excited States of Solids, DPC'10, June 20, 2010 - June 25, 2010, Argonne, IL, United states 作者: Zhang J.; Zhang J.; Zhang J. 收藏 \| 浏览/下载：29/0 \| 提交时间：2013/03/25 In this paper we introduce a sol-gel process for preparing Y 2Si2O7: Eu3+ nanocrystals. The rare earth compounds were dispersed in the SiO2 colloids and the monodisperse nano-scale composite materials were prepared. The reactant mass fraction and heat treatment temperatures could affect the structures and emission spectrum properties of as-synthesized samples. The samples emit the strong red light upon excitation under the ultraviolet. The main peaks originate from 5D0-7F2 electric dipole transition of Eu3+. With regard to the samples treated at different temperatures the emission spectra obtained under 266 nm excitation show different shapes of spectra lines and relative intensities indicating that the Eu3+ ions have been located in different local environments. 2011 Published by Elsevier B.V.
	An automatic pedestrian detection and tracking method: Based on mach and particle filter (EI CONFERENCE) 会议论文 OAI收割 2011 International Conference on Network Computing and Information Security, NCIS 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China Han Q.; Yao Z. 收藏 \| 浏览/下载：14/0 \| 提交时间：2013/03/25 This paper introduces a pedestrian detecting and tracking approach. Correlation filters present the composite properties which have been successively used in target detection. Particle filter are combined to locate the targets in real-time. Our contribution is proposing a general algorithm that is able to detect and track pedestrians in clutter environments. We also create a different view pedestrian dataset. Experiments show our algorithm is comparative when there is block and occlusion in tracking. 2011 IEEE.
	Using temporal coherence to determine the responses of water clarity to hydrological processes in a giant subtropical canyon-shaped reservoir (China) 期刊论文 OAI收割 QUATERNARY INTERNATIONAL, 2010, 卷号: 226, 期号: 1-2, 页码: 151-159 作者: Xu, Yaoyang; Shao, Meiling; Cao, Ming; Zhou, Shuchan; Cai, Qinghua 收藏 \| 浏览/下载：60/12 \| 提交时间：2010/12/23 PARANA RIVER FLOODPLAIN LAKE CHEMICAL RESPONSES CLIMATE-CHANGE DIFFERENT ENVIRONMENTS SYNCHRONOUS VARIATION NORTHERN WISCONSIN GORGES RESERVOIR GREAT-LAKES XIANGXI BAY POPULATION
	The replacement of dry heat in generic reliability assurance requirements for passive optical components (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China 作者: Zhang G.; Zhang G.; Zhang G. 收藏 \| 浏览/下载：21/0 \| 提交时间：2013/03/25 According to Generic Reliability Assurance Requirements for Passive Optical Components GR-1221-CORE (Issue 2 January 1999) reliability determination test of different kinds of passive optical components which using in uncontrolled environments is taken. The test condition of High Temperature Storage Test (Dry Test) and Damp Test is in below sheet. Except for humidity condition all is same. In order to save test time and cost after a sires of contrast tests the replacement of Dry Heat is discussed. Controlling the Failure mechanism of dry heat and damp heat of passive optical components the contrast test of dry heat and damp heat for passive optical components (include DWDM CWDM Coupler Isolator mini Isolator) is taken. The test result of isolator is listed. Telcordia test not only test the reliability of the passive optical components but also test the patience of the experimenter. The cost of Telcordia test in money manpower and material resources especially in time is heavy burden for the company. After a series of tests we can find that Damp heat could factually test the reliability of passive optical components and equipment manufacturer in accord with component manufacture could omit the dry heat test if damp heat test is taken first and passed.