选煤厂工业电视系统的数字化应用

对比分析了传统模拟闭路电视监控系统的局限性和数字化工业电视系统的优势,介绍了数字化工业电视系统的组成及其在选煤厂中的应用。通过网络平台和软件技术,工业电视系统可以实现与选煤厂集控系统、MIS、安防系统、消防系统的信息交换与共享,从而提高了整个系统的实时性和可视化,保证了企业的安全高效生产。     

选煤厂胶带机集控系统故障预警恢复模型设计

针对煤矿选煤厂胶带机集控系统中由于矸石、异物、机械损伤等原因引起的胶带机、破碎机、分级筛故障，造成设备损坏、影响生产的问题，提出集控系统故障预警恢复模型。通过解析电机实时电流，建立自学习模型，预测变化趋势，做出控制策略，自动修改胶带机集控系统中各设备运行参数，实现在设备故障发生前及时预警或停机，避免设备电机损伤扩大化或因设备突然停机煤流大量涌入引起的堆煤、堵塞等问题。通过一段时间的现场应用表明，该优化模型的实施不仅降低了设备损伤率，减少系统故障恢复时间，提高生产效率，也增加了原有控制系统的稳定性和使用率。     

基于iFIX的胶带传输集控系统设计

针对贵州某煤矿在胶带传输的各个环节仍采用人工监测方式、难以实现胶带传输集中管理的问题,提出了一种基于iFIX的胶带传输集控系统的设计方案。该方案中,地面调度中心的监控主机和井下PLC设备均安装iFIX组态软件作为SCADA系统节点,同时连入地面调度中心的工业电视;监控主机和井下PLC设备共同接入由矿井通信中心建立的工业以太网,完成对现场胶带传输数据的交换和实时管理功能。实际应用表明,该系统实现了井下胶带传输数据的共享与信息联通,提高了井下生产的安全性。     

工业以太网在选煤厂集控系统中的应用

本文根据兖矿某选煤厂集控改造,围绕以太网两级结构,介绍了整个系统的结构以及功能.整个系统包括PLC集控系统、模拟量采集系统、视频监控、语音报警系统等.通过这次改造,全厂形成了清晰的两级网络结构,全厂自动化水平达到一个新的高度.     

朱仙庄矿选煤厂集控调度系统设计

本文主要介绍了淮北矿务局朱仙庄矿选煤厂生产集控调度系统的设计方案。该生产集控调度系统主要有三部分组成：集中控制（合电子信息显示）、程控调度通讯、工业电视。该系统将三个子系统有机结合在一起，构成了现代化的选煤厂生产集控调度系统。     

地铁车库恒温集控系统设计

针对地铁车库"燃气辐射供暖系统"供暖方式,基于STM32和CAN总线技术,设计了一种既可单台运行也可多台联合群控运行的智能恒温集控系统。该系统由PC客户端、信息集控器、温控器和温度采集器等四部分组成。对系统方案、硬件设计和软件设计进行了详细介绍,并给出了实验测试结果。系统可实现对地铁供热设备的集中监控、独立设置、自动运行、节点扩展、功耗检测和故障保护预警等功能,具有很好的实时性和稳定性。     

SCADA智能报警设计与实现

油田监控中有大量需要定期设置报警限的参数,利用SCADA实时数据库技术对监控点近期运行状况进行数学分析,通过内部逻辑算法集成,自动生成监控参数报警限,使系统发出警报,有利于监控人员迅速判明现场情况,及时采取应对措施.采用SCADA智能报警技术,在自动设置报警限和智能报警方面取得了很好的成效,有效提高了系统报警的直观性和准确性.     

KDFC环境自动监测与监控系统

1 系统简介 KDFC环境自动监测与监控系统是基于GSM/GPRS无线移动通讯网络的工业级自动数据采集与远程监控系统。在监控范围内,各分散的监测设备对监控点的环境参数进行精确检测,并通过GSM/GPRS网络将检测到的数据集中传送到监控中心。监控中心对采集到的所有数据进行分类、记录、分析和管理,同时生成各种相应的动态画面、事件报警、趋势记录和数据报表等。另外,通过GSM/GPRS网络,系统还可发送控制指令到各监控点,进行远程控制;或将所采集到的数据上报到各个相关部门,实现数据共享。 2 应用 区域性、流域性或行业性企事业单位…     

EAST快控电源远程监控系统的实现

EAST(Experimental Advanced Superconducting Tokamak)等离子体垂直位移快速控制电源(简称:EAST快控电源),是EAST高功率电源系统的组成部分之一,是一个大容量的AC/DC/AC单相逆变电源——具有电流源特性的电压源型逆变器。本文设计并实现了远程监控系统。该系统远程监控计算机使用力控V6.0组态软件调用实时数据实现界面显示、远程操作与故障报警。这一监控系统的实现保证了EAST快控系统安全可靠的运行。     

CZM—3型选煤集控装置

<正> CZM—3型选煤集控装置是一种多功能时序步进式顺序控制器,它由操作台、逻辑柜和模拟屏等组成,可对大、中、小型各类选煤厂的生产设备进行集中控制、集中监视和故障自动报警等。该装置采用HTL高抗干扰集成电路作为基本器件。控制电路分数字程序电     

Effective solution of certain problems of theory of schedulings of nets

Cybernetics and Systems Analysis -     

Complexity of families of learning algorithms and estimation of the nonrandomness of extraction of empirical regularities

The paper presents a general approach to the evaluation of the complexity of classes of algorithms, so-called pVCD-method. To develop this method, all the examined families of models of empiric generalization were restricted to classes implementable on computers and, wider, by examining their partially recursive representations. Within the framework of the algorithmic approach, the concept of Kolmogorov’ complexity of algorithms for the recognition of properties or the extraction of regularities is proposed. The method proposed to evaluate the nonrandomness of the extraction of empirical regularities is based on this concept.     

Analysis of microdensitometric data in terms of probability of cleavage of DNA

Computer-aided analysis of autoradiographic films of DNA fragments is presented. The Powell least-squares procedure is used for optimization of parameters for components of complex densitometric curves. Since each densitometric spectrum may be divided for several non-overlapped blocks of bands, there is no upper limit on the number of parameters which must be optimized. Eight shapes for the component bands are utilized: symmetric and asymmetric Gauss and Cauchy functions, direct, symmetric and asymmetric product of Gauss function and inverse of Cauchy function, and log-normal function. The probability of DNA cleavage is calculated with correction for multiple cuts. The methods presented was applied to detailed analysis of densitometric spectra of a 21-bp DNA restriction fragment and allowed for direct correlation between structural microheterogeneity of DNA and the resulting cutting pattern. This method should facilitate the analysis of densitometric data from antibiotic-induced cleavage of DNA and footprinting experiments.     

联合收割机脱粒滚筒恒速智能控制器设计

研究了轴流式联合收割机的控制问题,给出了联合收割机脱粒滚筒的数学模型,介绍了基于模式识别的智能控制原理,建立了联合收割机脱粒滚筒恒速控制模型,设计了基于模式识别的智能恒速控制器.应用Matlab/Simulink进行了控制器仿真,其结果表明,将基于模式识别的智能控制应用于联合收割机脱粒滚筒的恒速控制,其过渡过程平稳、响应速度快、无超调、无振荡并且无稳态误差.     

An estimate of numbers of terms of semicycles of delay difference equations

In this paper, we study the semicycles of oscillatory solutions of the delay difference equation y_n+1 − y_n + p_ny_n-k = 0, where p_n is a sequence of nonnegative real numbers and k is a positive integer. Upper bound of numbers of terms of semicycles are determined in the case when

Our results improve and complement known results in literature.     

Complexity of approximation of 3-edge-coloring of graphs

The problem to find a 4-edge-coloring of a 3-regular graph is solvable in polynomial time but an analogous problem for 3-edge-coloring is NP-hard. To make the gap more precise, we study complexity of approximation algorithms for invariants measuring how far is a 3-regular graph from having a 3-edge-coloring. We show that it is an NP-hard problem to approximate such invariants with an error O(n1−ε), where n denotes the order of the graph and 0<ε<1 is a constant.     

Modifications of the method of variation of parameters

In spite of being a classical method for solving differential equations, the method of variation of parameters continues having a great interest in theoretical and practical applications, as in astrodynamics. In this paper we analyse this method providing some modifications and generalised theoretical results. Finally, we present an application to the determination of the ephemeris of an artificial satellite, showing the benefits of the method of variation of parameters for this kind of problems.     

计算机辅助课表编排技术的研究

讨论了几种实用的计算机辅助课表编排技术及在实际编排中的应用。应用分析表明，采用分批与或图搜索和分批优化的匈牙利算法相结合的方法，在计算机辅助课表编排中是行之有效的。