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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 Roads as drivers of above-ground biomass loss at tropical forest edges in Xishuangbanna, Southwest China 期刊论文  OAI收割 LAND DEGRADATION & DEVELOPMENT, 2019, 卷号: 30, 期号: 11, 页码: 1325-1335 作者:  Dissanayake, Dissanayake Mudiyanselage Naveen Jayalal;  Zhai, De-Li;  Dossa, Gbadamassi Gouvide Olawole;  Shi, Jipu;  Luo, Qinghui   |  收藏  |  浏览/下载：70/0  |  提交时间：2019/07/29 ecosystem services  edge effects  monoculture rubber  road ecology  tropical forests   Topography and soil type are critical to understanding how bird and herpetofaunal communities persist in forest fragments of tropical China 期刊论文  OAI收割 BIOLOGICAL CONSERVATION, 2017, 卷号: 215, 期号: x, 页码: 107-115 作者:  Dayananda, Salindra K.;  Mammides, Christos;  Lee, Myung-Bok;  ...;  Quan, Rui-Chang   |  收藏  |  浏览/下载：40/0  |  提交时间：2017/11/24 Agricultural Mosaics  Amphibian Conservation  Bird Conservation  Edge Effects  Forest Fragmentation  Rubber Expansion   Competition of edge effects on the electronic properties and excitonic effects in short graphene nanoribbons 期刊论文  iSwitch采集 New journal of physics, 2016, 卷号: 18, 期号: 12 作者:  Lu,Yan;  Wei,Sheng 收藏  |  浏览/下载：93/0  |  提交时间：2019/05/09 Exciton effects  Short graphene nanoribbons  Edge states  Spin polarization  Tight-binding model   Edge effects on the characteristics of uranium diffusion on graphene and graphene nanoribbons 期刊论文  OAI收割 CHINESE PHYSICS B, 2016, 卷号: 25, 期号: 8, 页码: - 作者:  Cheng, C;  Han, H;  Ren, CL;  Wang, CY;  Shao, K 收藏  |  浏览/下载：28/0  |  提交时间：2017/03/02 diffusion  armchair GNR  zigzagGNR  edge effects   Influence of edge effects on single event upset susceptibility of SOI SRAMs 期刊论文  OAI收割 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2015, 卷号: 342, 页码: 286-291 作者:  Xi, Kai;  Liu, Gang;  Hou, Mingdong;  Geng, Chao;  Bi, Jinshun   |  收藏  |  浏览/下载：20/0  |  提交时间：2018/07/16 Single event upset  Edge effects  Sensitive region  CREME-MC simulation   The research of digltal CR medicine image adapitive enhancement method (EI CONFERENCE) 会议论文  OAI收割 4th International Conference on Mechanical and Electrical Technology, ICMET 2012, July 24, 2012 - July 26, 2012, Kuala Lumpur, Malaysia Ming-Hui Z.; Yao-Yu Z. 收藏  |  浏览/下载：63/0  |  提交时间：2013/03/25 Digital CR medicine radiation image is in doctor's favor and has became medicine imaging technology new hot spot because of its high gray contrast  powerful computer disposal function  little radiation dosage  non-film diagnosis  different area consultation. But degradation of digital X-ray medical image such as low contrast and blurring during radiographic imaging  caused by complexity of body tissue and effects of X-ray scattering and electrical noise etc.  can worsen the results of analysis and diagnosis. So it is usually needed that CR medicine image is enhanced to improve its vision quality  and easy to doctor's more accurate diagnosis. The general enhancement algorithms over enhancing the contrast and lose image details  aiming at the defects  an enhancement algorithm for CR image is proposed based on the ratio of deviation to mean of domain. The arithmetic enhance CR image edge details by adjusting factor K based on the ratio of deviation to mean of domain of CR image. Experiment results demonstrate that the algorithm enhances CR image detail and CR image enhanced has good visual effect  the adaptive enhancement method is fit for CR medicine image. (2012) Trans Tech Publications  Switzerland.   Space camera dynamic image quality measurement and evaluation (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:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25 By using analysis of the infinity image of the space camera  we intend to obtain the curve of the dynamic modulation transfer function. We extract the pixel gray values at the image edge which distribute as a knife-edge function  and make differential calculation and Fourier transformation of it  and then we can obtain the dynamic MTF curve of the optical system. The value of the curve at the Nyquist frequency is the most important parameter that reflects the image quality. We add push-scanning imaging and environmental effects to the static MTF of space camera and compare the MTF value with the dynamic MTF at Nyquist frequency. The comparison result can help us verify the accuracy of the calculating results and the feasibility of our method. (2011) Trans Tech Publications.   Remote sensing image restoration using estimated point spread function (EI CONFERENCE) 会议论文  OAI收割 2010 International Conference on Information, Networking and Automation, ICINA 2010, October 17, 2010 - October 19, 2010, Kunming, China 作者:  Yang L.;  Yang L. 收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25 In order to reduce image blur caused by the degradation phenomenon in the imaging process  the acquired images of the space remote sensing camera are restored. First  the frequency-domain notch filter is adopted to remove strip noises in the images. Then degradation function  which is referred to as the point spread function (PSF) of the imaging system is estimated using the knife-edge method. To improve the accuracy of the estimation  the estimated PSF is adjusted with Gaussian fitting. Finally  the images are restored by Wiener filtering with the fitted PSF. The restoration results of the remote sensing images show that almost all strip noises are eliminated by the notch filter. After denoising and restoration  the variance of the remote sensing image worked with in this paper increases 30.979 and the gray mean gradient increases 3.312. Due to Gaussian fitting  the accuracy of the PSF estimation is heightened. Image restoration with the final PSF is benefit to interpreting and analyzing the remote sensing images. After restoration  the contrasts of the restored images are increased and the visual effects become clearer. 2010 IEEE.   Variation character of stagnation point heat flux for hypersonic pointed bodies from continuum to rarefied flow states and its bridge function study 期刊论文  iSwitch采集 Science in china series g-physics mechanics & astronomy, 2009, 卷号: 52, 期号: 12, 页码: 2007-2015 作者:  Wang ZhiHui;  Bao Lin;  Tong BingGang 收藏  |  浏览/下载：32/0  |  提交时间：2019/05/10 Rarefied gas effects  Sharp leading edge  Hypersonic  Stagnation point heat flux  Bridge function   High-power Nd:YAG planar waveguide laser with YAG and Al2O3 claddings 期刊论文  OAI收割 opt. commun., 2008, 卷号: 281, 期号: 14, 页码: 3781, 3785 Xiao Ling; Cheng Xiaojin; 徐剑秋 收藏  |  浏览/下载：1376/212  |  提交时间：2009/09/18 diode pumped solid-state laser  thermal effects  planar waveguide laser  oblique edge-pumping