机构

• 昆明动物研究所 [2]
• 长春光学精密机械与物... [1]
• 上海神经科学研究所 [1]
• 生态环境研究中心 [1]

采集方式

• OAI收割 [5]

内容类型

• 学位论文 [2]
• 期刊论文 [2]
• 会议论文 [1]

发表日期

• 2017 [1]
• 2015 [1]
• 2014 [1]
• 2012 [1]
• 2010 [1]

学科主题

• Developmen... [1]
• 生物学 [1]

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 HIV/AIDS转基因树鼩细胞模型的建立与初步研究 学位论文  OAI收割 北京: 中国科学院大学, 2017 作者:  杨翔   |  收藏  |  浏览/下载：28/0  |  提交时间：2019/09/24 Hiv/aids动物模型,树鼩,Hiv限制因子  Hiv/aids Animal Models, Tree Shrew, Hiv-1 Restriction Factors   Increased expression and dysregulated association of restriction factors and type I interferon in HIV, HCV mono- and co-infected patients 期刊论文  OAI收割 JOURNAL OF MEDICAL VIROLOGY, 2015, 卷号: 88, 期号: 6, 页码: 987-995 作者:  Zhu JW;  Liu FL;  Mu D;  Deng DY;  Zheng YT[*] 收藏  |  浏览/下载：15/0  |  提交时间：2015/11/03 HCV  HIV  co-infection  restriction factors  type I interferon   SIRT1 suppresses self-renewal of adult hippocampal neural stem cells 期刊论文  OAI收割 DEVELOPMENT, 2014, 卷号: 141, 期号: 24, 页码: 4697-4709 作者:  Ma, Chen-yan;  Yao, Mao-jin;  Zhai, Qi-wei;  Jiao, Jian-wei;  Yuan, Xiao-bing 收藏  |  浏览/下载：56/0  |  提交时间：2015/04/22 CENTRAL-NERVOUS-SYSTEM  CALORIE RESTRICTION  TRANSCRIPTION FACTORS  DEPENDENT REGULATION  MAMMALIAN SIRTUINS  GENE-EXPRESSION  LIFE-SPAN  NEUROGENESIS  DEACETYLASE  DIFFERENTIATION   土壤古菌的多尺度分布特征及其生态学机制 学位论文  OAI收割 博士, 北京: 中国科学院研究生院, 2012 曹鹏 收藏  |  浏览/下载：91/0  |  提交时间：2013/12/19 土壤古菌  土壤细菌  群落组成和分布特征  多尺度  生态位理论  中性理论  空间因子  环境因子  物种多度拟合模型  荧光实时定量PCR  末端限制性片段多态性  克隆和测序  soil archaea  soil bacteria  community composition and distribution  multiple scale  niche theory  neutraltheory  spatial factors  environmental factors  species abundance fitting models  real-time PCR  terminal restriction fragment length polymorphism  cloning and sequencing   Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China 作者:  Zhao S.;  Tian Y.-Z.;  Liu L.-S.;  Guo J.;  Zhang H.-Y. 收藏  |  浏览/下载：27/0  |  提交时间：2013/03/25 In order to lead the laser beam transmit in the atmosphere convergently  an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly  the laser was collimated by a beam expander  then the near-parallel laser beam was transmitted with a Galileo telescope system  and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform  so the focus of the system changed due to the tiny displacement of the concave lens. Secondly  the average power of the laser spot can be measured using power meter  the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly  the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer  then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image  then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above  the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm  it is 10.43% of the total diameter of the laser spot. At last  the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit  attenuation in the atmosphere  geometrical aberration of optical system  and the diffraction limit and the geometrical aberration are significant in the three factors above  so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.