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浏览/检索结果: 共15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 Relative Contribution of Growing Season Length and Amplitude to Long-Term Trend and Interannual Variability of Vegetation Productivity over Northeast China 期刊论文  OAI收割 FORESTS, 2020, 卷号: 11, 期号: 1, 页码: 20 作者:  Zhou, Yuke   |  收藏  |  浏览/下载：15/0  |  提交时间：2020/05/19 vegetation phenology  growing season length  peak growth  vegetation productivity  relative importance  Northeast China   Relative Contribution of Growing Season Length and Amplitude to Long-Term Trend and Interannual Variability of Vegetation Productivity over Northeast China 期刊论文  OAI收割 FORESTS, 2020, 卷号: 11, 期号: 1, 页码: 20 作者:  Zhou, Yuke   |  收藏  |  浏览/下载：26/0  |  提交时间：2020/05/19 vegetation phenology  growing season length  peak growth  vegetation productivity  relative importance  Northeast China   On inexact ADMMs with relative error criteria 期刊论文  OAI收割 COMPUTATIONAL OPTIMIZATION AND APPLICATIONS, 2018, 卷号: 71, 期号: 3, 页码: 743-765 作者:  Xie, Jiaxin   |  收藏  |  浏览/下载：38/0  |  提交时间：2019/01/11 Alternating direction method of multipliers (ADMM)  Inexactness  Relative error criteria  Large step-length   Traits and growth of liana regeneration in primary and secondary forests of Central Amazonia 期刊论文  OAI收割 Applied Vegetation Science, 2012, 卷号: 15, 期号: 1, 页码: 108-118 Mareike Roeder; Dirk Ho¨ lscher; Isolde D. Kossmann-Ferraz 收藏  |  浏览/下载：50/0  |  提交时间：2012/03/26 Canopy cover  Herbivory  Leaf area  Relative growth rate  Specific leaf area  Stem slenderness  Tropical forest  Width length ratio   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：66/0  |  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.   Design of reimaging F/1.0 long-wavelength infrared optical system (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:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：45/0  |  提交时间：2013/03/25 A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly  the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations  while low dispersion lenses were used in the reimaging system  so the optical system do not need achromatic design for a high image quality. Then  to correct high-order aberrations resulting from large relative aperture  more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here  aspheric is selected for easily manufacture. Finally  the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing  and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).   A new non-dimensional number for friction characteristic of flow in micro-channel with slip 期刊论文  OAI收割 MODERN PHYSICS LETTERS B, 2008, 卷号: 22, 期号: 15, 页码: 1455-1461 作者:  Zhang, T. T.;  Jia, L.;  Wang, Z. C. 收藏  |  浏览/下载：39/0  |  提交时间：2015/12/18 numerical simulation  slip flow  modified viscosity  relative slip length  friction factor   Growth of height and leg length of children in Beijing and Xilinhot, China 期刊论文  OAI收割 ANTHROPOLOGICAL SCIENCE, 2008, 卷号: 116, 期号: 1, 页码: 67-76 作者:  Ashizawa, Kumi;  Tanamachi, Noriko;  Kato, Sumiyo;  Kumakura, Chiyoko;  Zhou, Xia   |  收藏  |  浏览/下载：18/0  |  提交时间：2011/08/22 height  relative leg length  children  Beijing  Inner Mongolia   Phenotypic plasticity in gut length in the planktivorous filter-feeding silver carp (Hypophthalmichthys molitrix) 期刊论文  OAI收割 THESCIENTIFICWORLDJOURNAL, 2008, 卷号: 8, 期号: 0, 页码: 169-175 作者:  Ke, Zhixin;  Xie, Ping;  Guo, Longgen 收藏  |  浏览/下载：82/7  |  提交时间：2010/10/13 silver carp  relative gut length  resource polymorphisms  phenotypic plasticity  food resource  zooplankton   Relative length of longest paths and cycles in graphs 期刊论文  OAI收割 GRAPHS AND COMBINATORICS, 2007, 卷号: 23, 期号: 4, 页码: 433-443 作者:  Liu, Huiqing;  Lu, Mei;  Tian, Feng   |  收藏  |  浏览/下载：22/0  |  提交时间：2018/07/30 relative length  the longest path  cycle