基于GIS的甘肃省道路网络评价

阐述了道路的网络评价指标体系和方法,并以甘肃省交通道路网为基础,在GIS技术的支持下,利用ArcView GIS、MapObjects和Visual Basic等进行了甘肃省分县道路网络的评价研究．结果表明,甘肃省道路网络存在聚团现象,存在以兰州市、天水市秦城区和庆阳地区西峰市为中心的道路可达性指标高值区,以及以玉门市为中心的一个高值带状区域．     

宣钢单喷镁铁水脱硫技术应用与实践

介绍了宣钢炼钢厂采用单喷颗粒镁铁水脱硫工艺,改善了转炉冶炼原料铁水条件,同时对镁在铁水中的脱硫机理作了简要的叙述.该工艺在生产实践中不断优化,使铁水经过预处理后终点硫均达到0.010%(质量分数)以下,最低终点硫含量达到0.003%,满足了炼钢铁水要求.     

Measurement of creep of optical fiber by a low coherent white light double interferometer system

The creep properties of optical fiber used in fiber optical sensors were studied in this paper.A low coherent white light double interferometer system was designed and calibrated and the creep deformations of optical fibers under static and cyclic loadings were measured with this device.The research results showed that polymer coated optical fibers crept at the beginning when they were under static or cyclic load.As the number of the cyclic loading or the static loading times increased the creep tended to s...     

Ka频段鳍线平衡混频器的设计

鳍线是一种用于毫米波集成电路的新型准平面传输线,本文介绍了三种鳍线平衡混频器的设计与性能,混频器均使用价格便宜的梁式引线二极管和国产介质基片。第一种鳍线魔T混频器在窄带内性能较好,包括中放在内的DSB噪声系数最小值为4.9dB。第二种鳍线混频器在多个频率点有较好性能,包括中放在内的DSB噪声系数最小值为5.3dB。第三种鳍线混频器在给定频带内具有宽带特性,包括中放在内的DSB噪声系数最小值为5.6dB。     

下荆江河道水力几何形态的研究

根据1950－1980年下荆江监利（姚圻脑）站的水文测验资料,运用L.B.Leopld河床水力几何形态原理,建立下荆江河道的河相关系式,研究该河道不力几何形态的特点及变化,研究表明,下荆江河道河宽指数b随流量的变化较小,而水深指数f随流量的变化较大,河床横断面具有窄深的特点。     

激光水下通信中图像信号处理方法

针对激光水下图像通信的特点，设计出一种专用图像编、解码方案以及消除方块效应的后处理方案；给出了实验结果及系统综合评价指标．该方案算法简单、运算时间短，具有较高的压缩比和较好的主客观图像质量．所研制的实验系统简单实用，能在极低比特率（320～640bit／8）和极短通信时间的条件下传送静止图像。     

Feature Extraction of Localized Scattering Centers Using the Modified TLS-Prony Algorithm and Its Applications

Feature Extraction of Localized Scattering Centers Using the Modified TLS-Prony Algorithm and Its Applications~~~~     

Ant System Based Optimization Algorithm and Its Applications in Identical Parallel Machine Scheduling

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监控光带宽对真空蒸镀窄带滤光片的影响

分析了监控光带宽对薄膜淀积时膜厚极值点的影响，建立了模拟薄膜实际淀积过程的计算机模拟程序，通过对几种窄带滤光片膜系结构的模拟分析，得到了这些膜系对监控光带宽的基本要求。     

Structures and Properties of Composite Yarns of Filaments and Wool Staple Fibers

More and more composite yarns of filament and wool staple fiber have been applied to develop the new type of fabrics. However, the great difference in yarn structures between the composite yarns and conventional staple yarns does affect the properties of yarns and fabrics. In this paper, it has been studied that the differences of the composite yarn properties of tensile, bending rigidity, torsional rigidity, the hairiness and irregularity etc.