数字环境下高校图书馆信息资源建设与共享探究

随着社会不断发展,我国高校图书馆也不断创新与变革.如今数字环境下的高校图书馆在进行信息资源建设时,面对信息资源质量不高、图书馆间利益失衡等困境,应围绕学科专业建设需要,加强标准化数字图书馆和文献资源共享体系建设,平衡各图书馆之间的利益,提升图书馆的管理水平,逐渐实现资源的全面共享.     

一种数字阵列天气雷达信号处理系统设计

为了获得气象目标信息参数、为分析湍流等天气过程演变提供更精细的信息、为高质量气象分析提供更好的手段,结合研制的某X波段数字阵列天气雷达,对数字波束形成（DBF）技术、杂波抑制和频域解模糊等问题进行了分析和仿真;探讨了DBF技术在天气雷达中的应用优势,对因波束电扫描使波位变化导致回波信号跳跃而限制IIR滤波器和脉冲对处理（PPP）应用的问题,提出采用频域插补技术来实现地物杂波抑制和保证气象目标券数估计的盾量．最后．给出了天气雷达信号处理系统工程设计方案．     

公益性数字图书馆法定许可制度研究——以信息网络传播权为视角

公益性数字图书馆因便捷、高效、低成本等优势迅速发展。它能使社会公众方便快捷地接触海量知识信息,但却受到了信息网络传播权的限制。文章从公益性数字图书馆与著作权之间的冲突分析入手,以平衡利益、促进文化传播的宗旨为考量,论证公益性数字图书馆法定许可的可行性,进而提出了公益性数字图书馆法定许可的具体制度建议。     

数字内容全生命周期保护理念及模型

针对数字内容在其生命周期中面临的威胁,提出了具有全程跟踪特性的数字内容全生命周期保护理念及保护模型.分析了壳式保护对象BCO的逻辑结构和物理结构形式,并结合具体应用实例,阐述了数字内容全生命周期的保护过程.     

全站仪和GPS数据格式的转化方法

全站仪和GPS下载的数据,其中大部分都是非DAT数据,而利用全站仪和GPS在野外所采集的数据进行计算机数字制图或测量控制网观测数据的处理时,需要DAT数据文件。在这种情况下,将所下载的非DAT数据文件转换成DAT数据文件,就显得较为重要。针对下载的非DAT格式的数据,利用WORD,EXCEL,CAD等大众化普及软件的某些功能,生成计算机数字制图或测量控制时可以被识别的DAT格式数据文件。该方法操作简单,易于掌握,避免用户开发或编写更复杂的软件和程序。从而达到事半功倍的效果。     

基于Atmega128与ATT7022的数字式三相电量表设计

介绍一款基于Atmega128单片机与ATT7022计量芯片为核心的数字式三相电量表设计,从硬件电路及软件设计进行论述。整体电路设计遵循强、弱电分离的原则,集成度高、功能强、成本低、抗干扰能力强、功耗低、测量精度高。所设计的电量表经上电检验具有功率双向计量、计费、保护、通讯、液晶显示,IC卡预付费等多种功能。能满足电能智能化管理及未来家用太阳能发电系统的电能计量要求,具有很好应用前景。     

高清数字钻孔电视技术研发及其在水电工程中的应用

 钻孔电视是能直观获得钻孔孔壁原状图像的地球物理方法,高清数字钻孔电视技术采用了先进的时间定时器,改进了光学工艺,加入了人-机互动调色功能的高分辨率摄像头,应用了消除电磁场对图像影响的处理技术,使其具有高精度、高分辨率和高保真度等特点。在某水电站坝址和围堰深厚覆盖层可视化研究中,利用高清数字钻孔电视技术,可清晰地获得钻孔孔壁原状图像,从而有效地查明工区的地质情况,为顺利施工提供技术保障,并为建立“数字化电子岩芯库”奠定了坚实的基础。     

Standardisation of digital human models

Digital human models (DHM) have evolved as useful tools for ergonomic workplace design and product development, and found in various industries and education. DHM systems which dominate the market were developed for specific purposes and differ significantly, which is not only reflected in non-compatible results of DHM simulations, but also provoking misunderstanding of how DHM simulations relate to real world problems. While DHM developers are restricted by uncertainty about the user need and lack of model data related standards, users are confined to one specific product and cannot exchange results, or upgrade to another DHM system, as their previous results would be rendered worthless. Furthermore, origin and validity of anthropometric and biomechanical data is not transparent to the user. The lack of standardisation in DHM systems has become a major roadblock in further system development, affecting all stakeholders in the DHM industry. Evidently, a framework for standardising digital human models is necessary to overcome current obstructions. Practitioner Summary: This short communication addresses a standardisation issue for digital human models, which has been addressed at the International Ergonomics Association Technical Committee for Human Simulation and Virtual Environments. It is the outcome of a workshop at the DHM 2011 symposium in Lyon, which concluded steps towards DHM standardisation that need to be taken.     

Subliminal channels in the identity-based threshold ring signature

Subliminal signature schemes enable senders to hide subliminal messages in a digital signature such that no one besides the authorised subliminal message receiver (called designated receiver) can extract subliminal messages from that signature. This paper is the first to construct subliminal channels on the identity-based threshold ring signature scheme. Two types of subliminal channels are proposed. The first is the unknown-sender subliminal channel, wherein the sender is anonymously sending the subliminal message through an identity-based threshold ring signature. Although the designated receiver can extract the subliminal message and confirm that it is from the known ring of signers, he/she cannot identify the real sender. The other proposed subliminal channel is the known-sender subliminal channel in which the designated receiver can identify the actual sender. Furthermore, the proposed unknown-sender subliminal channel can be extended to permit the sender to send multiple subliminal messages to multiple designated receivers via a single threshold ring signature.     

一种滑坡预测传感器的机理与测值可靠性探讨

对造成巨大生命财产损失的滑坡灾害,分析了其发展过程中的力学参数变化,提出用数字式遥感土压力仪与变形仪对之进行实时连续遥测和预报预警,认为钨铼合金丝式振弦仪器适于此类观测,其测定值是可靠的.