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双通道终端进行卫星双向法时间比对的归算方法

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陕西天文台台刊 2002年第2期25卷 81-89页

作者：李志刚李焕信张虹中国科学院国家授时中心陕西省临潼710600

用双通道终端进行卫星双向法时间比对,可同时实现多台站时间同步。但是,目前双通道终端卫星双向法时间比对仍采用经典二台站归算方法,同时性的优点并没有得到充分的利用,其结果不闭合,比对得到的结果不统一。为了避免了上述问题,给出了... 详细信息

用双通道终端进行卫星双向法时间比对,可同时实现多台站时间同步。但是,目前双通道终端卫星双向法时间比对仍采用经典二台站归算方法,同时性的优点并没有得到充分的利用,其结果不闭合,比对得到的结果不统一。为了避免了上述问题,给出了新的归算方法,在同一系统下给出时间比对结果。新的归算方法不但提高了时间比对精度,同时还给出卫星到地面站之间的精确伪距,籍此精确地测定卫星的实时位置。

关键词：卫星双向比对双通道终端经典二台站归算法卫星实时位置

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厘米波段背景噪声电平的测量方法及数据分析

天文学报 2003年第2期44卷 222-230页

作者：倪广仁盛军杨廷高赵当丽赵军民中国科学院国家授时中心西安710600 信息产业部电子第三十九所西安710060

论述了厘米波段天线背景噪声电平测量的重要作用、基本条件和要求。介绍了其测量系统灵敏度的估值方法,及在工程上用定标的技术参数计算灵敏度的公式。测量结果表明理论计算和测量数据处理结果符合得很好,证明该测量系统的灵敏度估算、... 详细信息

论述了厘米波段天线背景噪声电平测量的重要作用、基本条件和要求。介绍了其测量系统灵敏度的估值方法,及在工程上用定标的技术参数计算灵敏度的公式。测量结果表明理论计算和测量数据处理结果符合得很好,证明该测量系统的灵敏度估算、工程计算方法及实施的测量方法是科学的、严密的,测量的数据是真实的、准确的。同时给出系统测量原理方框图,定标的技术参数和技术路线等。并对测量结果进行了分析和讨论。

关键词：射电天文 P1..1.景噪声电平微弱信号测量数据分析

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高功率离子回旋波加热监测系统的设计

数据采集与处理 2009年第B10期24卷 294-297页

作者：刘大明唐忠杜海舟赵燕平上海电力学院计算机系上海200090 中国科学院等离子体物理研究所合肥230031

本系统的开发主要是为HT-7和EAST装置下监测发射机运行状态并提供声光报警,并为高功率离子回旋波加热物理机制研究提供准确的实时数据。采用模块化设计和图形化编程语言实现了高功率离子回旋波加热监测系统的网络通讯、人机对话、数据... 详细信息

本系统的开发主要是为HT-7和EAST装置下监测发射机运行状态并提供声光报警,并为高功率离子回旋波加热物理机制研究提供准确的实时数据。采用模块化设计和图形化编程语言实现了高功率离子回旋波加热监测系统的网络通讯、人机对话、数据处理、数据显示、数据库服务及网页发布功能,通过模块划分,采用层次递进,实现了系统巡检模式及系统触发模式监控。在现场测试结果中,发射机工作状态波形监测准确,发射机故障位置判断正确,实时性符合设计要求。

关键词：离子回旋波加热监测系统 Labview

Experimental investigation of high temperature thermal contact resistance with interface material

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Theoretical & Applied Mechanics Letters 2011年第5期1卷 41-44页

作者： Xiaoping Zheng1.Donghuan Liu,2,3 Dong Wei,4 and Xinchun Shang 2,3 1. Applied Mechanics Laboratory,Department of Engineering Mechanics,Tsinghua University,Beijing 1.0084,china 2) Department of Applied Mechanics,University of Science & Technology Beijing,Beijing 1.0083,china 3) National center for Materials service Safety,University of Science & Technology Beijing,Beijing 1.0083,china 4) china Aerodynamics Research and Development center,Mianyang 621.00,china china Aerodynamics Research and Development {1. Mianyang 621000 China

Thermal contact resistance plays a very important role in heat transfer efficiency and thermomechanical coupling response between two materials,and a common method to reduce the thermal contact resistance is to fill a soft interface material between these two materials.A testing system of high temperature thermal contact resistance based on INSTRON 8874 is established in the present paper,which can achieve 600 C at the *** on this system,the thermal contact resistance between superalloy GH600 material and three-dimensional braid C/C composite material is experimentally investigated,under different interface pressures,interface roughnesses and temperatures,*** the same time,the mechanism of reducing the thermal contact resistance with carbon fiber sheet as interface material is experimentally *** show that the present testing system is feasible in the experimental research of high temperature thermal contact resistance.

关键词： thermal contact resistance interface material experimental research high temperature alloy C/C composite material

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信息资源建设的现状与趋势

图书情报工作 2004年第4期48卷 5-10页

作者：高凡中国科学院文献情报中心北京100080

从单一媒体到多媒体,本馆收藏到无墙图书馆,收集、占有资源到适时供应,信息资源建设渠道的多样化,构建可持续发展的资源保障体系等5个方面,论述网络环境下信息资源建设的现状与趋势。

关键词：信息资源建设图书馆存储介质多媒体信息电子资源网络信息资源虚拟馆藏资源共享信息服务文献订购网络订购集团采购可持续发展

Research of Technologies on Discreet Factory Construction General Contract Project Management

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Research of Technologies on Discreet Factory Construction Ge...

第1.届工业工程与工程管理国际学术会议

作者： Chang-yan HU 1.Yong YE 1.Yan-tao ZHOU 1.Xin-min HAN 2 1.First Design and Research Institute, MI china Bengbu, Anhui, china 2.china academy of Machinery Science & Technology Beijing, china

This paper focuses on factory construction management with multi-side participation, which is a general contract at the same time. To solve problems caused by resources sharing among different systems, which result in a divide between information technologies and the de facto requirement, this research applies SOA ({1. Oriented Architecture) to integrate resources from different systems, which is a loosely coupled and cross-platform architecture. Through {1. choreograph, functions in different departments and enterprises could be reused. BPM (Business Process Management), a business process centered method, provides a sound solution to choreograph {1.s. At last, building a business process warehouse to facilitate reuse business processes is proposed.

关键词： Project Management SOA BPM Discreet Factory Construction Business Process Warehouse

Testing service Unit Based Distributed Measurement and Control System

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Testing Service Unit Based Distributed Measurement and Contr...

ICEMI'2005第七届国际电子测量与仪器学术会议

作者： Yi Yong1.2 Zeng Jiazhi1.Luo Zhao2 Wu Bo1.Yuan Liang1.(1. School of Automation Engineering UESTC of china Chengdu 61.054 china 2. Department of Computer Science and Technology Chengdu University 61.1.6 china)

In the engineering usage of Distributed Measurement and Control System (DMCS), its architecture has followed the computer networks’ for a long period of time. The architecture of DMCS has important di

关键词： DMCS layer architecture testing service unit micro-communication element.

CONSTRUCTION OF NETWORK DATABASE ON ANIMAL GENETIC RESOURCES IN china

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CONSTRUCTION OF NETWORK DATABASE ON ANIMAL GENETIC RESOURCES...

Progress of Information Technology in Agriculture

作者： Xiong Benhai Ma Yuehui Luo Qingyao Pang Zhihong Institute of Animal sciences {1. academy of Agricultural sciences: Post Code: 1.0094 Beijing china

＜正＞ This study introduces a network database of animal genetic resources in china based on standardized resources data from both " {1. Animal Breed Records" and much collected animal genetic information anew;software and hardware circumstance and TBF no-structural full-text database. At the same time, we have published our website http: //***/ by Internet. Inside the website, we supply many information searching means such as full-text searching, field searching, combination searching, secondary searching and multi-databases searching, etc. Finally, it points out the future development objectives of the network database as follows: the first is how to get dynamic animal genetic information in china, the second is to realize transition of information service from current content management to future knowledge management.

关键词： animal resources network databases

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利用光纤进行高精度时间传递

时间频率学报 2003年第1期26卷 75-80页

作者：梁双有任燕中国科学院国家授时中心陕西省临潼710600

介绍了一种利用光纤电视信道传递时间和频率的初步方案 ,对闭环时延的测定作了阐述。

关键词：光纤时间传递