共查询到20条相似文献,搜索用时 15 毫秒
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《每周电脑报》1999,(32)
gineering, Hohai Univ., Nanjing 210098)The development status of soil mechanics is analysed, and development tendency is discussed, some well developed and the well concerned areas are studied. Suggestions concerning the further development of soil mechanics are put forward.soil me 相似文献
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《每周电脑报》1999,(41)
NAI 公司开始发行综合性软件包McAfee Office 2000Pro,该产品用以对PC 进行加固、保护、修理和优化。McAfee Office 2000 Pro 将把 McAfeeOffice 2000中已引入的用户界面加以扩展,提供一种向导,帮助用户找到该软件包中的各种工具,它既包含了 McAfeeOffice 2000的所有模块,如 VirusScan、McAfee Utilities、First Aid、Uninsttaler、Oil Change、Y2K Survival Kit 和McAfee Virtual Office,还增加了先进技术 PGP 和加密狗(Guard Dog)。加密狗软件保护了财务资料、个人身份资料和浏览习惯,防止有人窃取这 相似文献
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本文叙述了综合布线的最新发展。1)从技术上说明了适用于10Gb以太网的下一代多模光纤(NGHHF)OH3的特点。NGHHF和VCSEL(垂直腔表面发射激光器)配套才能达到低成本的10Gb带宽,300米距离。它能满足96%的大楼主干布线的需求。2)100Gb单模光纤能在更高端应用上满足LAN主干的带宽要求,它的关键技术是消除了传统单模光纤在139Onm处的高吸收损耗带(水峰)。零水峰单模光纤与波分复用技术设备的组合,使100Gb传输速率的低成本实现有了可能。10G NGHHF与100G零水峰单模光纤,使综合布线系统的技术内涵更加丰富和完整,使我们在构作建筑物的GCS时,有更多的选择。 相似文献
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Le Sun Weidong Ge Yunjie Chen Jianwei Zhang Byeungwoo Jeon 《International journal of remote sensing》2013,34(19):6037-6060
ABSTRACTHyperspectral unmixing is essential for image analysis and quantitative applications. To further improve the accuracy of hyperspectral unmixing, we propose a novel linear hyperspectral unmixing method based on l1?l2 sparsity and total variation (TV) regularization. First, the enhanced sparsity based on the l1?l2 norm is explored to depict the intrinsic sparse characteristic of the fractional abundances in a sparse regression unmixing model because the l1?l2 norm promotes stronger sparsity than the l1 norm. Then, TV is minimized to enforce the spatial smoothness by considering the spatial correlation between neighbouring pixels. Finally, the extended alternating direction method of multipliers (ADMM) is utilized to solve the proposed model. Experimental results on simulated and real hyperspectral datasets show that the proposed method outperforms several state-of-the-art unmixing methods. 相似文献
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A 3-year PACS project was started in 1997 and completed in 1999 with filmless radiology and surgery. An efficient network for transferring images provides the infrastructure for integration of different distributed imaging systems and enables efficient handling of all patient-related information on one display station. Because of the need for high-speed communications and the massive amount of image data transferred in radiology, ATM (25, 155 Mbit/s) was chosen to be the main technology used. Both hardware and software redundancy of the system have been carefully planned. The size of the Dicom image library utilizing MO discs is currently 1.2 TB with 300 GB RAID capacity. For the increasing amount of teleradiologic consultations, a special Dicom gateway is planned. It allows a centralized and resilient handling and routing of received images around the hospital. Hospital-wide PACS has already improved the speed and quality of patient care by providing instant access to diagnostic information at multiple locations simultaneously. The benefits of PACS are considered from the viewpoint of the entire hospital: PACS offers a method for efficiently transporting patient-related images and reports to the referring physicians. 相似文献
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本文研究l^1优化设计在一般情形下的连续性,本文的结论是文(1)的推广,首先,证明了l^1优化设计在一般情形下次优解的存在性并给出了l^1优化设计的统一算法,然后,证明了l^1优化设计在一般情形下的连续性。这个结论是研究自适应l^1控制理论的基础。 相似文献
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随着3D游戏的飞速发展,3D加速芯片也日新月异。Power VR的新一代显示芯片Power VRSG已经出炉。而3D labs也发布了其继Permedia 2后的又一新款芯片Permdia 3。特撰此文,以与朋友们共同分享。 Power VRSG (Power VR Second Generation) 实际上我们可以将其称之为Power VR二代。他是一块采用了0.25微米工艺制造的芯片。这一先进技术自然注定了Power VRSG将拥有极高的性能。内建的RAMDAC、2D功能、全浮点几何运算和混合引擎不 相似文献
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王雪梅 《数字社区&智能家居》2005,(12):188,191
本文主要介绍分析图形场景中的交互操作,并以表格形式和UML应用工具Rational Rose对图形场景中的基本操作进行了描述和分析,对一般的图形场景都适用. 相似文献
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采用l1范数准则函数对测试数据进行数据拟合的方法,称为l1数据拟合。介绍了遗传算法及其在数据拟合中的应用,并且给出了应用实例。 相似文献
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本文讨论具有鲁棒稳定性和抗持续有界扰动的控制器设计问题.提出了一种新的综合
灵敏度指标函数,这种指标函数既可用于单变量系统也可用于多变量系统.通过选择权系数,
设计者可对鲁棒性和抗扰性灵活地进行加权,并给出了把这种l1综合指标优化设计问题转化
为一般l1优化问题求解的方法. 相似文献