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• 地理科学与资源研究所 [5]
• 长春光学精密机械与物... [3]
• 心理研究所 [2]
• 武汉物理与数学研究所 [1]

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• OAI收割 [11]

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• 期刊论文 [8]
• 会议论文 [3]

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• 2023 [1]
• 2022 [5]
• 2018 [1]
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浏览/检索结果: 共11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 The restorative effects of short-term exposure to nature in immersive virtual environments (IVEs) as evidenced by participants? brain activities 期刊论文  OAI收割 JOURNAL OF ENVIRONMENTAL MANAGEMENT, 2023, 卷号: 326, 页码: 11 作者:  Zhang, Gaochao;  Wu, Guowei;  Yang, Jun   |  收藏  |  浏览/下载：42/0  |  提交时间：2023/01/06 Restorative effect  Urban forest  Immersive virtual environments  Electroencephalogram  Controlled experiment   Low temperature and short daylength interact to affect the leaf senescence of two temperate tree species 期刊论文  OAI收割 TREE PHYSIOLOGY, 2022, 页码: 14 作者:  Wang, Huanjiong;  Gao, Chengxi;  Ge, Quansheng;  Makela, Annikki   |  收藏  |  浏览/下载：35/0  |  提交时间：2022/09/21 autumn phenology  controlled experiment  leaf senescence  phenological model  photoperiod  temperature   Low temperature and short daylength interact to affect the leaf senescence of two temperate tree species 期刊论文  OAI收割 TREE PHYSIOLOGY, 2022, 页码: 14 作者:  Wang, Huanjiong;  Gao, Chengxi;  Ge, Quansheng;  Makela, Annikki   |  收藏  |  浏览/下载：22/0  |  提交时间：2022/09/21 autumn phenology  controlled experiment  leaf senescence  phenological model  photoperiod  temperature   Effects of chilling on heat requirement of spring phenology vary between years 期刊论文  OAI收割 AGRICULTURAL AND FOREST METEOROLOGY, 2022, 卷号: 312, 页码: 10 作者:  Lin, Shaozhi;  Wang, Huanjiong;  Ge, Quansheng;  Hu, Zhi   |  收藏  |  浏览/下载：25/0  |  提交时间：2022/09/21 Climate change  Spring phenology  Chilling  Heat requirement  China  Controlled experiment   Effects of chilling on heat requirement of spring phenology vary between years 期刊论文  OAI收割 AGRICULTURAL AND FOREST METEOROLOGY, 2022, 卷号: 312, 页码: 10 作者:  Lin, Shaozhi;  Wang, Huanjiong;  Ge, Quansheng;  Hu, Zhi   |  收藏  |  浏览/下载：25/0  |  提交时间：2022/09/21 Climate change  Spring phenology  Chilling  Heat requirement  China  Controlled experiment   The restorative effects of short-term exposure to nature in immersive virtual environments (IVEs) as evidenced by participants' brain activities 期刊论文  OAI收割 Journal of Environmental Management, 2022, 卷号: 326B, 期号: 116830 作者:  Gaochao Zhang;  Guowei Wu;  Jun Yang   |  收藏  |  浏览/下载：31/0  |  提交时间：2023/01/13 Restorative effect  Urban forest  Immersive virtual environments  Electroencephalogram  Controlled experiment   Pricing weather index insurance based on artificial controlled experiment: a case study of cold temperature for early rice in Jiangxi, China 期刊论文  OAI收割 NATURAL HAZARDS, 2018, 卷号: 91, 期号: 1, 页码: 69-88 作者:  Sun, Qing;  Yang, Zaiqiang;  Che, Xianghong;  Han, Wei;  Zhang, Fangmin   |  收藏  |  浏览/下载：18/0  |  提交时间：2019/05/30 Early rice  Weather index insurance  Artificial controlled experiment  Grain Buds Cold   A design on a control method of a new type of focal plane shutter (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 Xue L.; Ming L.; Zheng L.-N.; Zhou J.-F.; Zhang H.-W.; Zhang J.-C. 收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25 In order to ensure appropriate exposure time  and no exposure while electric charge is transferring after taking a photograph  it is necessary to have the shutter mechanism cooperate with CCD for area CCD aerial cameras. The ground object illumination has a wide range which is from 4000Lx to 100000Lx  so a shutter which is high efficient and a continuous stepless adjustment are also required. This paper introduces the fundamental principle  structural design and control procedure about this new focal plane shutter. Under the control of DSP  the velocity of shutter curtain governed by the shutter motor can be not only precisely controlled  but also the durability and the reliability are increased. The experiment results have shown that this new shutter has the higher stability of movement  long life span with more than 105 operating times  a wide range of exposure time from1/ 50s to 1/ 320s(depending on the slit width)and the exposure error is less than 10%. With the CCD gain adjustment  the performance of this shutter is fully satisfied with the requirements of area CCD aerial cameras. 2010 IEEE.   The removal function of edge effect and amending with dwell time function (EI CONFERENCE) 会议论文  OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China 作者:  Luo X.;  Zhang F.;  Zhang F.;  Wang X.-K.;  Zheng L.-G. 收藏  |  浏览/下载：35/0  |  提交时间：2013/03/25 Computer Controlled Optical Surfacing (CCOS) is widely used for making optical aspheric mirrors. In the practical fabrication  edge effect is an important problem which restricts the fabrication efficiency and accuracy seriously. In this paper  the edge effect is solved by working out the edge removal function and compensate with dwell time function. Skin Model is used to describe the pressure distribution when the tool hangs over the work-piece. The calculation model of edge removal function is derived from Skin Model theoretically. A removal function experiment is completed. The difference between the theoretical model and the experiment results is less than 5%. It means that the calculation model is suit for the practical fabrication. Than the dwell time is solved with edge effect compensation by matrix-based algorithm. In the end  actual experiment was done to validate the edge effect compensation method. 2010 Copyright SPIE - The International Society for Optical Engineering.   Configuring an electrostatic membrane reflector with potentials exerted on distributed electrodes (EI CONFERENCE) 会议论文  OAI收割 2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China 作者:  Zhang P.;  Shi G. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 Electrostatic membrane reflector (EMR) is very promised for optical quality application with the merits of utra-lightweight and flexible. Configuring a circular membrane reflector with electrostatic potentials exerted on distributed electrodes can approximatively produce a parabolic shape. A 300mm EMR (made from polyimide) stretched by distributed electrodes below is designed  and the number of concentric electrodes needed for membrane shape forming is analysed. First  based on an analytical solution of Poisson's equation  determine the membrane control matrix by finding influence functions of 3 concentric electrodes and 6 control points on membrane surface in order to compute the needed voltages exerted on the distributed electrodes by the method of least-squares fitting. Then the final shape solved by finite element analysis with ANSYS is contrasted with the paraboloid and deviates greatly when the central displacement of membrane is beyond 2.5mm  but in this range increasing the number of electrodes and control points will get a better shape. The corresponding errors are analyzed  and the control method is concluded. Only using the integrated method of analytical computation  numerical analysis and experiment  the membrane shape of certain central displacement can be exactly predicted and controlled. 2009 IEEE.