有源阵列天线的发展及应用

介绍了有源阵列天线的发展概况、组成结构及技术特点,并对比其与无源阵列天线的优缺点,讨论了有源阵列天线的应用及发展前景。     

Remote sensing applications in the Australian Bureau of Meteorology

Abstract

The space age for the Bureau of Meteorology arrived in December 1963 with the first direct receipt in Australia of visual images of clouds from the US TIROS-8 satellite. Since that time, the successful application of advances in satellite data, products and services has brought dramatic improvements to most aspects of the Bureau's operations and research. This paper documents the developments of the past 25 years by describing the Bureau's current national infrastructure for the reception, processing and dissemination of meteorological satellite data and the way in which satellite data and systems are used to improve the Bureau's services. The meteorological satellite has emerged not only as a highly cost-effective primary observation platform, providing an increasingly diverse range of meteorological data, but also as a vital communications medium for both general meteorological information and the interrogation of complementary observational systems. The prospects for further major advances in the application of satellite information within the Bureau are very high. During the early 1990s and beyond, the next generation of active remote sensing technology will replace the current passive sensor technology deployed in the international meteorological satellite network. As a result, further improvement in the ability of the Australian meteorological community to describe quantitatively the dynamic and thermodynamic structure of the atmospheric and marine environment is confidently predicted.     

HPI接口在脑电数据采集系统中的实现

本文基于DSP5402芯片HPI接口技术的研究实例.重点介绍了在脑电数据采集系统中通过CCS5000集成开发环境实现DSP芯片HPI自举加载并与主机通信的调试:并论述了系统的硬件设计和各模块的调试方法.     

日本政府建筑建设标准的经验及其对我国的启示

以日本《关于国家机关的建筑物及其附属设施的位置、规模和构造的标准》、《新建一般政府建筑面积确定标准》、《政府建筑设施建设的法律》、《营造修缮项目管理要领》为例,介绍了日本政府建筑建设标准的经验,从建设标准的地位、内容体系、编制原则、编制方法、制订模式、标准实施、管理、更新等方面提出改进我国政府投资工程项目建设标准的相关建议。     

皮肤点刺试验在皮肤科的应用及护理

目的 总结1232例皮肤点刺试验的应用经验.方法 应用德国Allergopharma标准变应原液在前臂屈侧皮肤进行皮肤点刺试验,同时应用0.1%组胺和生理盐水分别作为阳性和阴性对照试验,判断阴性或阳性结果及阳性强度.结果 在1232病例中,过敏原阳性率为81.33%;尘螨(屋尘螨+粉尘螨)阳性率(57.00%)明显高于其它过敏原,其次阳性率较高的有虾(18.34%).结论 尘螨是慢性过敏性皮肤病常见的首要过敏原;为提高皮肤点刺试验的准确性,要注意操作细节(用生理盐水擦拭清洁代替皮肤消毒;刺入皮肤的深度为恰好刺破真皮;注意动态观察:各种测试液不能混合;保证生理盐水不被尘螨污染).     

Upper tibial hyperextension fractures in infants: another occult toddler''s fracture

Our study describes a newly designed stapedotomy prosthesis which consists of two components: (1) a platinum ribbon, and (2) a Teflon shaft. The first innovation is a flattened 'tab' on the posterior aspect of the platinum ribbon. The second innovation concerns the dual diameter cylinder-like shaft. Our prosthesis was implanted into 25 individuals, who underwent stapedotomy for stapes fixation, and the results are shown and discussed. Our innovations offer a proper and safe insertion of the prosthesis into the oval window associated with excellent manipulation and handling. At the same time, maximum visualization of the surgical field is achieved, while the stepped-down design of the shaft prevents the prosthesis protruding into the vestibule.