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Search Results: 1 - 10 of 412784 matches for " <br>朱伟明 "
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卫星影像反立体改正算法比较探究

昕宇,,王树根,余磊,郭清<br>昕宇,, 王树根, 余 磊, 郭 清
- , 2015,
Abstract: 太阳同步卫星成像时的光照方向与人类视觉习惯相反,导致影像中出现地形反转的感知现象,即反立体现象.现有的一些方法能够改正这种严重误导影像解译的现象,但针对算法的系统性比较研究较为缺乏.以SPOT-5与WorldView-2卫星影像为例,从反立体改正程度、空间细节的保持、光谱特性的保持方面选取几种代表性算法进行比较,进而归纳出各个算法的特点及适用情况,为实际应用打下基础.
Asymptotic Stability of a Family of Vector Difference Equations with Multi-Delays
一类多时滞的向量差分方程的渐近稳定性(英文)

ZHU Wei,ZHENG Ji-Ming,<br>,郑继
中国科学院研究生院学报 , 2006,
Abstract: The asymptotic stability of a family of vector difference equations with multi-delays is studied.A sufficient and necessary condition,based on the properties of matrices and inequality techniques,for determining the asymptotic stability is given.
A review on studies of secondary metabolites from marine fungi
海洋真菌生物活性物质研究之管见

ZHU Wei-Ming,WANG Jun-Feng,<br>,王俊锋
菌物学报 , 2011,
Abstract: Marine fungi are a kind of important source for active marine natural products. Up to now, 1,117 new compounds have been isolated and identified from the fermentation broth of marine fungi. In this paper, the history, status quo, methods and issues in studying secondary metabolites from marine fungi are presented. The compounds originated from marine fungi and their perspective in drug discovery were also discussed.
包容型领导风格对雇佣关系氛围和员工主动行为的影响研究
CEO Inclusive Leadership and Employee Proactive Behaviors: The Mediating Effect of Employment Relation Climate

刘泱,,赵曙<br>LIU Yang,ZHU Wei,ZHAO Shuming
- , 2016,
Abstract: 摘要 基于134家企业的调查样本,首次检验了CEO的包容型领导风格对员工主动行为的正向影响,并验证了雇佣关系氛围在这一过程中发挥的中介作用和组织结构对这一中介过程的调节作用。研究结果表明,CEO包容型领导风格可以通过在组织中形成良好的雇佣关系氛围,进而影响员工在工作中的主动行为。通过跨层次整合组织层面和员工层面的因素,揭示了包容型领导风格对员工主动行为的影响过程,这能为企业的员工行为管理实践提供启示和借鉴
Study on the Method of Improving EFPI''''s Signal Quality
提高光纤F-P应变传感器输出信号质量的方法研究

(Opto-electronic Engineering,<br>,张洁,,黎学,黄尚廉
光子学报 , 2004,
Abstract: The measurement accuracy of EFPI (Extrinsic Fabry Perot Interferometers) strain sensor is affected by the quality of its output signal. However whatever kind of demodulation algorithm is adopted, a poor interferential pattern with low contrast and low amplitude always leads to a rough measurement result. To address this problem, the signal quality of EFPIs with different end reflectivity was theoretically analyzed in this paper. Computer simulation indicated that the signal quality could be improved by increasing the reflectivity of fiber ends in the F P cavity. This is also experimentally demonstrated by vaporization coating to each fiber end.
Self-phase Modulation Dependent Transmission Characteristics of Super-Gaussian Pulses in Photonic Crystal Fibers
光子晶体光纤中自相位调制效应对超高斯脉冲传输的影响

ZHU Wei-ming,YAO Duan-zheng,CHEN Su,<br>,姚端正,陈苏
光子学报 , 2007,
Abstract: In order to study the connection between the micro-structure of the photonic crystal fibers and their light transmission characteristics,the self-phase modulation spectrum of a super-Gaussian pulse is calculated using the supercell method and the light transmission equation of photonic crystal fibers.It is found that both Gaussian pulse and super-Gaussian pulse have steeper trailing edges on the blue sides; super-Gaussian pulse has lower peak powers than the Gaussian pulse over the central region; super-Gaussian pulse has a larger spectral broadening;with the increasing of propagation length z the spectral broadening trend to become lager.All the results fit the self-steepen theory well. Since the nonlinear coefficients of the traditional fibers are smaller than those of the photonic crystal fibers,the self-phase modulation has less effect on them comparing with the photonic crystal fibers.
Research of network management agent based on AgentX in ForCES framework
ForCES体系结构中基于AgentX的网管代理机制的研究

JIN Rong,WANG Wei-ming,ZHU Guan-gxin,<br>金蓉,,广信
计算机应用研究 , 2007,
Abstract: 首先介绍了ForCES体系结构,然后给出了一种ForCES体系结构中基于AgentX的网管代理方案,最后详细研究了若干实现机制,并给出了测试结果.
Force and Failure Analysis of Diamond Saw-blade in Cutting of Granite
金刚石锯片在锯切过程中的受力与失效分析

ZHANG Xin ming,ZHU Yong wei,XIE Guang zhuo,WANG Shao bin,<br>张新,
摩擦学学报 , 2001,
Abstract: The force on diamond saw blade during cutting of granite was measured and the number of diamonds truly taking part in cutting of the stone in the contact zone was estimated. As the results, the mean force applied on an individual diamond particulate is much smaller than the compressive static strength of the particulate. The failure of diamond saw blade at a low load is attributed to the thermal stress induced in repetitive cutting. The service life and the cutting efficiency are related to the ratio of the polished diamonds to the micro fractured ones. Namely, the higher the ratio of the polished diamonds to the micro fractured ones, the longer the service life of the saw blade and the higher the cutting efficiency.
联合云检测与高通滤波的含云影像融合方法
Fusion of Cloudy Opical Satellite Imagery by Cloud Detection and HPF Pass Filtering

余磊, 张永军,, 昕宇<br>YU Lei, ZHANG Yongjun, SUN Mingwei, ZHU Xinyu
- , 2016, DOI: 10.13203/j.whugis20140505
Abstract: 云噪声是光学卫星影像的常见问题,为了衡量云噪声对影像融合带来的影响,本文以高通滤波融合算法为例进行分析,指出云与地物的均值相差越大,云对影像融合的影响越大,并提出了 一种针对含云影像的融合方法,即联合云检测与高通滤波的含云影像融合方法。该方法首先利用NIR/R-OTSU云检测算法实时进行云检测,判别出影像中的云覆盖区域;其次采用局部优化策略利用高通滤波融合方法分块对非云区域进行处理,得到融合影像。利用资源三号多光谱和正视全色影像进行融合实验,结果表明,本文算法比高通滤波融合方法、亮度色度饱和度(intensity hue saturation,IHS)变换融合方法、Pansharp融合方法更适用于含云影像的融合处理
Formation of Selective Porous Silicon Array Using Boron Ion Implantation
硼离子选择注入制备多孔硅微阵列

Chen Shaoqiang,Shao Li,Wang Weiming,Zhu Jianzhong,Zhu Ziqiang,<br>陈少强,邵丽,,建中,自强
半导体学报 , 2004,
Abstract: According to the different porous silicon fabricating process of p type and n type silicon substrate,a new technology of boron ion implantation to form a selective p type array on n type substrate is introduced.After electrochemical etching process,a selective porous silicon is obtained.By this way,the defects of the conventional mask technology are avoided.The selective porous silicon array is characterized by AFM and SEM.
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