河北广电光缆干线网动环监控系统的应用

河北广电光缆传输干线网动环监控系统是根据河北广电网络的自身特点建设的,实现了对偏远山区无人值守站发电机的远程控制,利用省干线OTN公务语音通道解决了无人值守站动环监控信息的传送问题,切实做到了对全网站内动力环境的集中监控管理。应用该系统大大提高了网络维护的及时性和准确性,提高了维护水平和运维效率,节省了网络运营成本,达到了减员增效的目的,保障网络安全可靠运行。     

铁塔公司基站动环监控建设模式探讨

随着当前电信业新一轮改革的深入推进,铁塔公司将承担着三家电信运营商全部新建基站及存量基站配套设施的运营维护,基站动环监控系统是基站基础设施运维的基础手段,如何建成适合铁塔公司运营又符合运营商需要的基站动环监控系统,是高效运营基站配套设施的关键所在.本文从铁塔公司基站运营的需求特点出发,对铁塔公司基站动环监控系统应具备的功能进行分析,提出了动环监控系统建设的模式建议.     

动环监控系统与EOMS接口实现动环告警工单自动派发

加快支撑手段建设,实现集中管理、集中维护、集中监控是中国移动的5项网络重点工作之一,动环监控系统是配套设备实现"三集中"的唯一支撑手段,配套设备分布在所有机房和基站,点多面广,现场维护工作量大,省中心如何快速把配套设备告警信息传递给设备维护人员,我们通过把动环监控系统与EOMS系统接口,使动力设备及局房环境告警工单自动派发给设备维护人员,实现了全省配套设备的"三集中".     

TD-LTE基站动环智能监控系统设计方案

通过对中国移动现有动环监控系统的功能实现及组网特点进行分析,结合运营商的视频监控增值业务平台及4G基站IP化接入,提出实现TD-LTE基站动环监控、视频监控、门禁安防等功能的智能监控系统设计方案,并对以后的基站动环监控系统建设提出展望。     

大数据时代动环集中运维管理浅析

文中剖析了目前上海移动动环监控系统存在的不足之处,分析了当今大数据时代对动环监控系统效率提升的帮助,并结合集团公司集中化运维管理的要求,对动环监控系统今后的发展提出了建议。     

浅析通信局站动环监控系统的标准化——中国电信动环监控系统升级和标准化工作相关问题探讨

为适应"集约化运营"的维护体制改革要求,中国电信集团将逐步对动环监控系统中的所有信号进行规范化、标准化的设置,并建立省级动环网管平台。通过对江苏电信动环监控系统存在的问题进行充分的研究,从局站名称、设备名称、信号名称和信号属性的统一入手,最终探索出可以简单复制的标准化模式,并对省级动环网管平台的收敛模式和各单元的功能进行详细的分析,对制定动环监控系统的集约化规范具有很好的借鉴作用。     

图像获取在基站监控的应用探讨

传感、识别、控制和执行技术在动环监控领域已经有比较成熟的应用,但是图像获取作为重要的感知手段,在基站动环监控系统中的作用和必要性还在摸索阶段。指出图像采集引入基站动环监控系统的主要思路为"视频监控智能化,数据监控可视化"。阐述了视频监控在基站维护、防盗、节能方面的具体应用。     

多系统融合支撑通信基站蓄电池全生命周期管理

对通信基站蓄电池性能管理工作中数据分析思路及评估体系进行阐述,通过动环监控、综合资源等多系统融合支撑,从各系统数据源实时采集,采用成熟的分析模型对全体数据进行清洗、整合、分析、挖掘,引入全生命周期管理理念,建立全新的维护手段,从而提高蓄电池性能,节约成本.     

研发交换网拨测系统

针对河北铁通目前既有网管业务监控缺失,网管存在监控死角及监控效率低下等问题.新建交换拨测系统,实现了业务监控,弥补了原有网管的缺陷.本文介绍了交换网拨测系统的开发过程及功能,提供了提高交换网网络监控效率的一种新手段.     

动环监控系统中B接口的实现

基站动力环境(动环)监控系统中的B接口协议,规范了监控中心与现场监控单元互联的数据传输方式.文章在研究B接口报文协议的基础上,设计了一种使用gSOAP工具的Web Service框架.在Web Service框架下,文章给出了用于基站动环监控系统中B接口报文协议的编程实现过程和测试方法.测试结果表明,使用gSOAP工具能够简化B接口报文协议实现的方式,符合监控中心与现场监控单元通信规范.     

全新的电源新品和电源系统设计工具

美国国家半导体公司（NS）新推出全新的SIMPLE SWITCHER系列新品及增强板WEBENCH设计工具。     

电源及电源管理领域的几个创新

2011年,电源类半导体产品将是一个250亿美元的庞大市场。本文介绍数字电源、功率器件与电源管理的部分发展趋势,及典型企业Intersil、英飞凌与Wolfson的产品动向。     

音频功率放大器功率传输及效率问题的探讨

讨论音频功率放大器功率传输及效率问题。通过分析和计算，得到传输功率、效率随负载变化的关系，认为在实际应用中，根据具体的功率要求，应兼顾传输功率和效率，合理地配接最佳负载。     

Transformer-Coupled Power Amplifier Stability and Power Back-Off Analysis

We present a mathematical analysis of the common-mode instability and power back-off feature of a transformer-coupled Class-AB differential power amplifier (PA). The efficient impedance matching of the transformer combiner and efficiency improvement at power back-off, a major benefit of this structure, are illustrated. In addition, an analytical model is derived to predict the common-mode oscillations in PA. The analytical results, based on a simple hand-calculation model for the transistor, show good agreement with simulation results using complete 90-nm models. Two methods to suppress the common-mode oscillations are investigated and analyzed in detail.     

Power and energy

The author gives an overview of the worldwide electricity supply industry. Subjects covered include: energy policy ineffectuality rules; new FERC regulations in the USA; Clean Air Act standard implementation experiences; and the severe electricity shortfall problems in Asia     

SRAM供电结构与SOC芯片供电网络设计优化

主要提出了一种优化SRAM供电结构的方案——裸露Metal4的SRAM供电网络。该方案可以在不增加使用绕线资源的条件下,显著地提升SRAM的供电以及整个芯片供电网络的性能。以一款数字电视解调芯片BTV2020为例,详细叙述了传统SRAM的供电结构,提出一种SRAM的供电结构及实现方法,以及对比了优化后的SRAM供电结构与传统SRAM供电结构,所构建的供电网络的最差电源电压降。最后通过流片结果证明本方案是有效可行的。     

Receiver Power Allocation and Transmitter Power Control Analysis for Multiple-Receiver Wireless Power Transfer Systems

As different power has its own receivers, this paper analyzes and designs a multiple-receiver wireless power transfer (WPT) system systematically. The equivalent circuit model of the system is established to analyze the key parameters including transmitter power, receiver power, transmission efficiency, and each receiver power allocation. A control circuit is proposed to achieve the maximum transmission efficiency and transmitter power control and arbitrary receiver power allocation ratios for different receivers. Through the proposed control circuit, receivers with different loads can allocate appropriate power according to its power demand, the transmitter power and system efficiency do not vary with the change of the number of receivers. Finally, this control circuit is validated using a 130-kHz WPT system with three receivers whose power received is 3:10:12, and the overall system efficiency can reach as high as 55.5%.     

Power and energy

The design and manufacture of electric power equipment, the one electrotechnology in which Europe could gain worldwide dominance by the end of the century, is examined. All three power-equipment categories-generation, transmission, and distribution-are involved. Europeans already lead in the production of extra-high-voltage (EHV) circuit breakers, high-voltage, direct-current (HVDC) equipment, and hydroelectric turbines. More recently, they have entered world markets for photovoltaics, nuclear generation equipment and services, combined-cycle generating plants, and energy storage. Currently, a spate of mergers and acquisitions is pushing the larger European companies in the field toward a continental stance. Both ABB (Asea Brown Boveri Ltd.), a giant created by a Swedish-Swiss merger, and Siemens, in Munich, have excellent lines of sulfur-hexafluoride and other EHV circuit breakers. ABB and Siemens are also strong suppliers of large power transformers and turbines     

Power and energy

Major power outages in various parts of the world have cast doubt on the electric power industry's claimed readiness for deregulation. Here, the author argues that, in the next few years, as service areas expand and bulk transfers of power grow ever greater, the electric utility industry's main technological challenge will be to maintain the reliability that customers now take almost for granted