浅谈信息化建设中的容灾问题

随着计算机与网络技术的飞速发展,容灾已经成为信息数据中心建设的热门课题,容灾技术也快速发展起来。但由于容灾方案的技术复杂性和多样性,一般用户很难搞清其中的优劣。为此,从容灾的等级以及技术指标出发,论述容灾中用到的存储区域网络技术、基于SAN的互连、远程复制技术,以及现流行的CDP（持续数据保护）等技术;同时．对主机型远程容灾、存储型异地容灾、虚拟化容灾和CDP连续数据保护容灾解决方案进行对比,从而合理规划和选择适合自己业务特点的容灾解决方案。     

编组站机车控制智能化的探讨

论述编组站机车无线综合安全控制系统的机车控制基本原则,提出实现机车控制智能化的基本思路和方法;就如何在确保安全的前提下提高调机作业效率进行分析,为实现编组站调机最佳自动控制在理论及技术上提出参考意见。     

关于完善TDCS安全体系的论述

TDCS（列车调度指挥系统）是实现铁路运输调度对列车运行实行透明指挥、实时调整、集中控制的现代化信息系统,是全路运输生产的总枢纽,因此保证其系统的安全性和可靠性是非常必要的。为此,从系统结构上对网络安全性进行分析,从终端、通道、站机的角度提出措施,保证TDCS的安全、可靠。     

用E1通道实现铁路通信无人机房远程集中监控

介绍了利用E1通道实现无人机房远程实时监控的方法,并对实施该方案的可行性、经济性进行了分析和论证。通过该监控系统的实施,既保障通信系统安全畅通,又有效降低运行维护成本。     

Sensing of chlorpheniramine in pharmaceutical applications by sequential injector coupled with potentiometer

This paper reports on development of a system consisting of a portable sequential injector coupled with potentiometric unit for sensing of chlorpheniramine （CPA）, based on the reaction of CPA with pota...     

Remotely-sensed chlorophyll a observations of the northern Red Sea indicate seasonal variability and influence of coastal reefs

The biological dynamics of the open northern Red Sea (21.5°–27.5° N, 33.5°–40° E) have not been studied extensively, due in part to both the inaccessibility of this desert region and political considerations. Remotely-sensed chlorophyll a data therefore provide a framework to investigate the primary patterns of biological activity in this oceanic basin. Monthly chlorophyll a data from the 8-year Sea-viewing Wide Field-of-View sensor (SeaWiFS) mission, and data from the Moderate Resolution Imaging Spectroradiometer (MODIS), were analyzed with the Goddard Earth Sciences Data and Information Services Center (GES DISC) online data analysis system “Giovanni”. The data indicate that despite the normal low chlorophyll a concentrations (0.1–0.2 mg m^− 3) in these oligotrophic waters, there is a characteristic seasonal bloom in March–April in the northernmost open Red Sea (24° to 27.5° N) concurrent with minimum sea surface temperature. The location of the highest chlorophyll concentrations is consistent with a linear box model [Eshel, G., and Naik, N.H., 1997. Climatological coastal jet collision, intermediate water formation, and the general circulation of the Red Sea. J. Phys. Oceanogr. 27(7), 1233–1257.] of Red Sea circulation. Two years in the data set exhibited a different seasonal cycle consisting of a relatively weak northern spring bloom and elevated chlorophyll concentrations to the south (21.5° to 24° N).The data also indicate that large coral reef complexes may be sources of either nutrients or chlorophyll-rich detritus and sediment, enhancing chlorophyll a concentration in waters adjacent to the reefs.     

某款右舵车中央集控器和遥控器的澳洲适应性设计

介绍澳洲对中央集控器和遥控器不同于中国的法规要求及市场要求。根据这些要求,在某款右舵车中央集控器和遥控器的基础上,通过更改功能和发射频率,以达到澳洲右舵车的市场要求。经过测试、试装验证和评审,结果达到预期的技术要求。     

车辆远程管理平台在车辆试验研究分析中的应用

本文叙述了基于GPS全球定位技术和GPRS移动通信技术的车辆远程管理平台的功能,重点介绍了其在车辆试验分析中的具体应用.     

美国及中国军用无人机的新发展与性能分析

文章介绍了美国军用无人机的一些新发展以及中国军用无人机的发展情况,并对各自发展的方向和趋势作了简要概括。通过对中美几种军用无人机性能参数的对比和分析,指出了中国军用无人机的差距。     

基于海上目标的通信对抗无人机的干扰效能分析

通过对通信对抗无人机对海上目标的超短波通信的干扰效能分析,得知在一般情况下,无人机的干扰功率只要大于0.416W就能进行有效干扰。通过与无人机对陆地目标的超短波通信干扰效能的比较分析,结果表明,在相同的电台通信距离,相同的干扰效果的情况下,无人机对海上舰舰超短波通信电台实施有效干扰的距离小于对陆地上车车超短波通信电台实施有效干扰的距离。