高校图书馆信息服务与大学生就业

分析了当前企业招聘与大学生择业的新趋势，阐述了高校图书馆在就业信息服务方面的优势，提出了高校图书馆为大学生就业服务的具体措施。     

数字波面干涉仪的绝对校正问题

数字波面干涉仪是高精度快速评价光学零件的有效工具，绝对校正是数字波面干涉仪研究中的一项重大技术，本文对数字面干涉仪的绝对校正问题作了一些探讨。     

Used digital speckle correlation method to realize orientation function of optical mouse

Used digital speckle correlation method (DSCM) to realize orientation function of optical mouse is researched. The experiment is designed to obtain the dynamic speckle patterns which are shot by CCD, then the DSCM is used to process the sequential images and also the experiment is simulated. The experimental results show the DSCM can confirm orientation function of the optical mouse, and have a good agreement with the simulation results, and the resolution we obtained is higher than the resolution of mouse on the market.     

制约高校图书馆网络化的因素及其对策

本文在分析我国高校图书馆网络化建设的基础上,探讨了制约高校图书馆网络化建设的因素并提出了相应的对策。     

电子出版的发展与电子阅览室建设

本文简述了当前电子信息网络与电子出版物的发展状况,并对电子阅览室的具体筹建作了简要的说明.     

智能化数字用户环路倍增系统

利用语音压缩技术和ＩＳＤＮＵ接口实现的数字用户环路倍增设备，可在一对用户线上传输多路高质量的话音或数据。介绍了该系统的技术基础、传输结构和软硬实现及其监控管理功能。     

Deformation measurements using mutual information: principle and applications

The paper presents a new method applied to measure displacement fields using mutual information concept. Based on analysis of digital image sequences, we propose the formulation derived from the mutual information between subsets in the un-deformed and deformed image. The quantity of the mutual information between two subsets establishes a criterion of their mutual dependence based on the notion of information connection between them. We can obtain the integer pixel displacement for the corresponding subset. And the accurate displacement field is obtained by using sub-pixel technique. In the experiments, the method is validated and the resulting solution can show accuracy to 0.02 pixels. This method was also applied successfully to determine the displacement fields of laminated composites of AS4/PEEK[0/±45/90]_7s under uniaxial compression.     

Damage and fracture prediction of plastic-bonded explosive by digital image correlation processing

By digital correlation processing of Scanning electronic microscopy (SEM) images, the paper presents the deformation and damage analysis of an energetic material—the plastic-bonded explosive (PBX) on mesoscopic scale. The analysis is made by observing the deformation field resulted from the digital image correlation (DIC) processing of the images corresponding to the loading steps and comparing with the surface profiles of the composite material so as to visualize the matter damage near a preset crack. The results show that the local deformation disturbance can reveal the material damage even happened underneath the specimen surface. The strain distribution in the front of the preset crack, can be used to predict the propagating route of the microcrack initiated from the tip of the pre-crack, which is related to the splitting fracture of the granular-based composite under compressive loading.     

Number-theoretic interpretation and construction of a digital circle

This paper presents a new interpretation of a digital circle in terms of the distribution of square numbers in discrete intervals. The number-theoretic analysis that leads to many important properties of a digital circle succinctly captures the original perspectives of digital calculus and digital geometry for its visualization and characterization. To demonstrate the capability and efficacy of the proposed method, two simple algorithms for the construction of digital circles, based on simple number-theoretic concepts, have been reported. Both the algorithms require only a few primitive operations and are completely devoid of any floating-point computation. To speed up the computation, especially for circular arcs of high radii, a hybridized version of these two algorithms has been given. Experimental results have been furnished to elucidate the analytical power and algorithmic efficiency of the proposed approach. It has been also shown, how and why, for sufficiently high radius, the number-theoretic technique can expedite a circle construction algorithm.     

浅谈图书馆如何更好地为老年读者服务

随着社会的发展,我国人口老龄化现象日益加剧。介绍了我国老年人口现状,阐述了宁夏图书馆老年阅览室存在的不足之处,提出了更好地为老年读者服务的措施。