浅谈变电站综合自动化系统功能与应用

变电站综合自动化是提高变电站安全稳定运行水平、降低运行维护成本、提高经济效益、向用户提供高质量电能的一项重要技术措施。采用变电站综合自动化技术是计算机和通信技术应用的方向。也是对整个电网的一、二次设备信息进行综合利用,发展和完善变电站综合自动化系统是电网发展的趋势。本文介绍了变电站综合自动化的基本概念．对系统应能实现的基本功能,以及变电站综合自动化的现状和发展前景进行分析。     

浅谈无人值班变电站综合自动化系统

近年来,随着中国电力工业的发展以及计算机、通讯等技术的不断进步,变电站综合自动化系统迈入了实用化的阶段.作者首先介绍了变电站综合自动化系统基本概念,并详细探讨了变电站综合自动化系统及其自动化监控系统的构成、功能及特点,以此体现变电站实现综合自动化的优越性.     

变电站综合自动化系统防雷设计

分析了综合自动化变电站二次设备遭受雷击的原因,针对其雷击特性设计出完备的解决方案。     

浅析变电站综合自动化系统的运行与维护

综合自动化系统是变电站二次系统在技术上的重大变革,它实现了自动化、计算机和通信技术在变电站领域的应用。该系统是确保电网安全、稳定、优质、经济运行的重要手段。其系统工程复杂．涉及到多种专业技术．这是因为该系统的维护工作和技术管理直接影响着电力系统的可靠性与安全性以及电气设备运行的稳定性。所以,为使系统能健康稳定地运行．必须认真做好该系统的运行和维护管理工作．掌握正确的运行维护方法和要领。     

变电站综合自动化系统的面向过程设计

面向过程设计是变电站综合自动化系统的基础和核心,使系统最终满足带有用户功能折过程要求,描述了面向过程设计中动态响应,系统范围内的任务,面向信息和一般处理任务等４项基本任务的内容。     

变电站自动化系统在发电厂的应用

本文首先就变电站综合自动化系统应用技术、特点和实现的功能做了介绍,然后简单阐述了系统的组成和软件系统。     

变电站综合自动化系统的模式与发展

变电站综合自动化是在计算机技术和网络通信技术的基础上发展起来的新兴技术，本文根据我国电力系统变电站综合自动化系统的现状，总结了当今变电站自动化系统的结构模式及其特点，综述了国内变电站综合自动化技术的发展方向。     

地区变电站自动化系统设计

针对各地区变电站系统日趋实现自动化控制的情况，研制开发了地区变电站（10kV分布式控制分散式安装变电站）综合自动化系统，详细介绍了此系统的总体结构、硬件结构、软件设计思想及软件的管理方式．     

电气自动化技术在变电站中的应用探究

随着新技术的发展,电气自动化逐步受到各领域的重视和认可,变电站作为电力输送环节的重要基础,更需要构建出系统、有效的电气自动化系统,从而有效保证工作效率的稳步提高。本文主要对电气自动化的作用及应用现状进行分析,对于其在变电站中的应用进行探析,逐步构建出符合变电站电气自动化发展的体系。     

Toward automated synthesis of oligosaccharides and glycoproteins

The discovery of previously unknown functions associated with carbohydrates and the study of their structure-function relations are of current interest in carbohydrate chemistry and biology. Progress in this area is, however, hampered by the lack of convenient and effective tools for the synthesis and analysis of oligosaccharides and glycoconjugates. Development of automated synthesis of such materials is necessary to facilitate research in this field. This review describes recent advances in carbohydrate synthesis, with particular focus on developments that have potential application to the automated synthesis of oligosaccharides, glycopeptides, and glycoproteins.     

县级农村变电站综合自动化的两票专家系统设计

随着大型发电厂、变电站的电网运行管理规划的普及,以及农网改造后期管理工作的需要,县级变电站中微机开列工作票和操作票代替手工开票势在必行。本研究开发的两票自动生成专家系统,是基于县站电网结构特点,将变电站拓扑结构中的设备参数按类建立关系数据库,并将两票自动生成的各种规则性知识用产生式规则表示出来建立规则库。推理机通过动态连接知识库,并根据对应的控制策略,推理形成工作票和操作票。同时在整体设计中与面向对象技术有机结合,建立了适合县站微机开票的专家系统。     

集控自动化系统存在问题浅析

介绍了集控自动化系统的结构形式、功能和通讯网络等内容,从技术、管理、运行维护、逻辑认证、防误闭锁和安全防护等多方面阐述了集控自动化系统实际应用中存在的若干问题,针对其在应用中存在的问题进行了探讨,并提出相应的理解及认识。     

Field-scale validation of an automated soil nitrate extraction and measurement system

One of the many gaps that needs to be solved by precision agriculture technologies is the availability of an economic, automated, on-the-go mapping system that can be used to obtain intensive and accurate ‘real-time’ data on the levels of nitrate nitrogen (NO₃–N) in the soil. A soil nitrate mapping system (SNMS) has been developed to provide a way to collect such data. This study was done to provide extensive field-scale validation testing of the system’s nitrate extraction and measurement sub-unit (NEMS) in two crop (wheat and carrot) production systems. Field conditions included conventional tillage (CT) versus no tillage (NT), inorganic versus organic fertilizer application, four soil groups and three points in time throughout the season. Detailed data analysis showed that: (i) the level of agreement, as measured by root mean squared error (RMSE), mean absolute error (MAE) and coefficient of efficiency (CE), between NEMS soil NO₃–N and standard laboratory soil NO₃–N measurements was excellent; (ii) at the field-scale, there was little practical difference when using either integer or real number data processing; (iii) regression equations can be used to enable field measurements of soil NO₃–N using the NEMS to be obtained with laboratory accuracy; (iv) future designs of the SNMS’s control system can continue to use cheaper integer chip technology for processing the nitrate ion-selective electrode (NO₃ ⁻–ISE) readings; and (v) future designs of the SNMS would not need a soil moisture sensor, ultimately saving on manufacturing costs of a more simple system.     

Development of an automated climatic data scraping, filtering and display system

One of the many challenges facing scientists who conduct simulation and analysis of biological systems is the ability to dynamically access spatially referenced climatic, soil and cropland data. Over the past several years, we have developed an Integrated Agricultural Information and Management System (iAIMS), which consists of foundation class climatic, soil and cropland databases. These databases serve as a foundation to develop applications that address different aspects of cropping systems performance and management. In this paper we present the processes and approaches involved in the development of a climatic data system designed to automatically fetch data from different web sources, consolidate the data into a centralized database, and delivery the data through a web-based interface.Climatic data are usually available via web pages or FTP sites. The exact steps to scrape data from different sources vary depending on how the data are rendered. The climatic data building process presented herein is broken down into 5 major program modules, corresponding to different phases of the process: Data Requester, Data Fetcher, Data Parser, Data Filter, and Data Explorer. The Data Requester is responsible for processing the web pages that lead to the determination of the requested weather data. The Data Fetcher is responsible for fetching weather data that is made available by the data sources based on the request from the Data Requester. The Data Parser is responsible for decompressing and parsing the contents of the original data file and saving the data to an SQL Server 2005 database. The Data Filter is responsible for data quality control and for estimating missing data and saving the filtered data. The Data Explorer is designed to provide web-based user access to the consolidated and filtered climatic data using both dropdown lists and map-based navigation.Three types of data are stored in the process: original climatic data in file format, parsed climatic data in SQL Server database, and filtered climatic data in SQL Server database. The resulting consolidated and filtered climatic database provides a common foundation that allows us to develop diversified applications that require dynamic access to near real-time data. A number of applications have been and are being developed that seamlessly access the foundation class climatic database. Collectively these applications address water conservation, crop production and management, land use suitability analysis, and bioenergy refinery site selection.     

数码也《变2》!

今夏最火莫过<变形金刚2>,以致大家见面都会互相问候:"今天你<变2>了吗?" 作为一部影评狂骂剧本,粉丝狂骂影评的争议大片, <变形金刚2>成败皆有缘故:成是由于变形很"金刚",败是因为情节很"2".光看名字就让我们明白了它毁誉参半的道理.由于形象过于深入人心,惯以外形取胜的数码产品也要"变2"--以后变形金刚不光能看能玩,还能用了.     

一个基于Web的信息自动采集和发布系统的设计应用

本文针对曲周农业信息服务网站建设的实际工作，讨论了建立一个信息服务网站所需考虑的一些相关技术．并重点讨论了基于Web的农业信息自动采集与发布系统的实现。该系统能够对Internet信息进行自动采集、分类，并对信息搜索和浏览进行必要的支持。     

An automated stand-alone in-field remote sensing system (SIRSS) for in-season crop monitoring

A stand-alone in field remote sensing system (SIRSS) with high spatial and temporal resolution was developed in this study. System control and image processing algorithms consisted of image acquisition control, camera parameter control, crop canopy reflectance calibration, image rectification, image background segmentation and vegetation indices map generation were developed and embedded in the SIRSS. The SIRSS is able to automatically capture multispectral images over a testing field at any predefined time points during the growing season and process captured images in real-time. This paper presents the SIRSS system design, image analysis procedures and determination of vegetation indices. In a validation experiment over an 8-plot corn field with three different nutrient treatments spanning the 2006 growing season, a total of 91 images were acquired and four different vegetation indices were derived from the images of each day. The largest differences of indices values among three treatments were indentified during the V6-V8 stages which implied this period could be the best time to detect variability caused by the nitrogen stress in the cornfield. The SIRSS has shown the potential of monitoring changes in vegetation status and condition.     

天津市高校图书馆自动化管理系统联合建设

介绍了天津市高校图书馆自动化管理系统（Unicorn）联合建设的现状,并就该系统特点,环境、设备设置,工作内容,所取的效益等进行了概括。

     

A real-time automated system for monitoring individual feed intake and body weight of group housed turkeys

Feed conversion is an important production trait in turkey breeding; the measurement of an individual bird's feed efficiency is important in identifying the most genetically superior individual. The development of a real-time automated feed intake and body weight monitoring system is described in this paper. The system integrated multiple feed and body weight weighing stations consisting of electronic scales, radio frequency identification (RFID) devices and data communication modules. A distributed and client-server-based system architecture with multi-threading software design was developed. This system architecture allowed for a real-time data acquisition capability when a large number of stations were required. A structured query language (SQL) database management system was developed to record and manage the dynamic feed intake and body weight gain data of individual birds. The developed system also offers a powerful research tool for studying poultry feeding behavior under group housing conditions.