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浏览/检索结果: 共12条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序作者升序作者降序 Quantifying the vertical microclimate profile within a tropical seasonal rainforest, based on both ground- and canopy-referenced approaches 期刊论文  OAI收割 IFOREST-BIOGEOSCIENCES AND FORESTRY, 2022, 卷号: 15, 期号: 1, 页码: 24-32 作者:  Deng, Yun;  Dong, Jinlong;  Zhang, Wenfu;  Yuan, Shengdong;  Tan, Zhenghong   |  收藏  |  浏览/下载：62/0  |  提交时间：2022/04/25 Tropical Seasonal Rainforest  Vertical Gradient  Light Environment  Temperature And Humidity  Distance From The Canopy Surface   Consistent temperature sensitivity of labile soil organic carbon mineralization along an elevation gradient in the Wuyi Mountains, China 期刊论文  OAI收割 APPLIED SOIL ECOLOGY, 2017, 卷号: 117, 页码: 32-37 作者:  Xu, Li;  Xu, Xia;  Ruan, Honghua;  Li, Qian;  Cheng, Xiaoli   |  收藏  |  浏览/下载：29/0  |  提交时间：2017/12/31 Temperature sensitivity  Labile soil organic carbon  Mineralization  Elevation gradient  Vegetation types  The wuyi mountains   Gradient Structure-Induced Temperature Responsiveness in Styrene/Methyl Methacrylate Gradient Copolymers Micelles 期刊论文  OAI收割 macromolecular rapid communications, 2014, 卷号: 35, 期号: 3, 页码: 309-316 Zheng,Chao; Huang,Haiying; He,Tianbai 收藏  |  浏览/下载：26/0  |  提交时间：2015/10/15 In this work  micelles are formed by gradient copolymer of styrene and methyl methacrylate in acetone-water mixture and their temperature responsiveness is investigated in a narrow range near room temperature. Three different kinds of structural transitions could be induced by temperature: unimers to micelle transition  shrinkage/stretching of micelles  and morphological transition from spherical micelles to vesicles. In addition  a model analysis on the interface of gradient copolymer micelle is made to better understand these phenomena. It is found that both position and composition of the interface could alter in response to the change in temperature. According to the experiments and model analysis  it is proposed that temperature responsiveness might be an intrinsic and universal property of gradient copolymer micelles  which only originates from the gradient structure.   Thermal-optical analysis for optical window under high Mach flight condition (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China Zhong C.; Ding Y.; Fu J. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 When the airborne platform  where installed the optical window  is in high Mach flight condition. The aerodynamic heating effect  which will influence optical properties of optical window  becomes very obvious. This special flight condition will change shape  refractive index and also refractive index distribution of optical window due to the generated high axial temperature gradient. To ensure image quality of aerial remote sensor  the present paper does thermal-optical analysis for optical window under high Mach flight condition. Then  on this basis  do simulations according to theoretical analysis and boundary conditions derived from practical assumptions in order to get the final conclusions. 2012 IEEE.   梯度NiCrAlY涂层的高温腐蚀行为 学位论文  OAI收割 硕士, 北京: 中国科学院金属研究所, 2012 于大千 收藏  |  浏览/下载：66/0  |  提交时间：2013/04/12 电弧离子镀  梯度涂层  预氧化  高温氧化  热腐蚀  Arc ion plating  the gradient coating  pre-oxidation treatment  high-temperature oxidation  hot corrosion   Borehole temperature logging and characteristics of subsurface temperature in the Sichuan Basin 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2011, 卷号: 54, 期号: 4, 页码: 1052-1060 作者:  Xu Ming;  Zhu Chuan-Qing;  Tian Yun-Tao;  Rao Song;  Hu Sheng-Biao   |  收藏  |  浏览/下载：18/0  |  提交时间：2018/09/26 Borehole temperature logging  Geothermal gradient  Thermal conductivity  Terrestrial heat flow  the Sichuan Basin   Borehole temperature logging and characteristics of subsurface temperature in the Sichuan Basin 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2011, 卷号: 54, 期号: 4, 页码: 1052-1060 作者:  Xu Ming;  Zhu Chuan-Qing;  Tian Yun-Tao;  Rao Song;  Hu Sheng-Biao   |  收藏  |  浏览/下载：17/0  |  提交时间：2018/09/26 Borehole temperature logging  Geothermal gradient  Thermal conductivity  Terrestrial heat flow  the Sichuan Basin   Design and simulation of CMOS star sensor lens with large relative aperture and wide field (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 Zhong X.; Jin G. 收藏  |  浏览/下载：63/0  |  提交时间：2013/03/25 A 50mm focal length  F/1.25  Gaussian type optical system is designed in this paper  which has 20field of view. Actual star image adding optical cross-talk effect of CMOS(Complementary Metal Oxide Semiconductor)  detector is simulated by non-sequential ray tracing in ZEMAX optical design and analysis software to evaluate its performance. The distortion relative to image spot centriod is introduced and calculated by simulated star images  which is less than 0.03% of lens in this paper. Thermal adaptability is discussed by opt-mechanic thermal analysis  which shows the RMS spot radius of marginal filed changes less than 0.7m under 10C temperature gradient  and changes less than 1m during homogeneous temperature changing from 40C to 40C. The results of analyses and simulations show the design of this lens can achieve the requirement of high precision CMOS star sensor well. 2011 IEEE.   Performance test of steel tube enclosed thermistors in air temperature measurements (EI CONFERENCE) 会议论文  OAI收割 3rd International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2011, January 6, 2011 - January 7, 2011, Shanghai, China 作者:  Yang H.;  Yan F.;  Yan F.;  Peng J. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 The performances of two steel tube enclosed precision thermistors are tested in a well controlled air environment to determine if the thermistors have enough accuracy for 0.01C levels of air temperature gradient measurement. Three Fluke's 5641 and three 5610 thermistors were tested for 24 hours in Fluke's 7008 calibration bath in the first step. In the second step  the performances of these two thermistors in steady state and transient state air temperature environments were tested for 8 hours separately. The results illustrate that  two of the 5641s were airproofed in a temperature well controlled tube  when steel tube enclosed precision thermistors are used in air temperature measurement  there are unstable departures from each other with a maximum 8.8 mC in constant air medium and 27 mC in temperature changing air medium. The transient-time errors are too large to show the true amounts of temperature changes for air temperature measurement. 2011 IEEE.   The analysis of the large-diameter primary mirror deformation of surface figure in the temperature field (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 Feng S.-L. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 The effect on the deformation of the primary mirror surface figure of the temperature gradient has been discussed theoretically. And its effect under axis and radial temperature gradient is analyzed when optical axis and support ways of the mirror changed. It has been concluded that the effect on the surface figure of the axis gradient is larger than radial gradient and also found that the deformation is concerned not only with thermal and structural parameter but also directly with the magnitude and direction of the temperature gradient. 2010 IEEE.