基于完成端口的消防通信服务器设计和实现

为满足消防灭火救援接处警系统中对通信服务器的性能和稳定性要求,在完成端口的基础上设计了分层结构的通信服务器架构。本文给出了该服务器架构的框架组成,并说明如何利用了完成端口框架实现通信处理并给出实现程序代码。最后给出了该架构在实现接处警系统中订阅发布业务中的具体应用。     

基于UML的消防接处警系统开发建模研究

接处警系统作为城市消防通信指挥系统的核心组成部分,系统结构复杂,功能强大。统一建模语言UML是一种表达能力丰富的、强有力的建模语言。该文首先简要介绍了UML几技术及其在开发应用程序中的一般框架,并以此为依据,使用UML对接处警系统开发进行建模,给出了基于UML的接处警系统开发分析阶段描述。     

城市119接处警系统安全性设计

119接处警系统是我国当前消防通信指挥系统中的重要组成部分。在这个经济快速发展的社会当中,火灾是威胁我国社会稳定、持续、健康发展的一个重大因素,尤其是在我国当代城市当中,城市人口密集,一旦发生火灾,给人民的生命财产安全造成了极大的威胁。为此,在城市中进行接处警系统的安全设计有着重大意义。本文对119接处警系统对城市的重要性做了相关的分析,结合当代计算机网络技术,对119接处警系统安全性设计进行了相关的探讨。     

消防接警员模拟训练系统设计与实现

分析消防接处警操作员训练现状,阐述建立消防接处警模拟训练系统的必要性。在此基础上,提出消防接处警模拟系统的结构框架,介绍模拟训练系统业务流程,实现模拟训练系统。本系统提高了消防接警员通过非实时系统应对各类灾害事故的消防指挥调度的效率和准确性。     

消防接处警调度管理系统

消防接处警调度管理系统结合计算机技术，实现快速接警、处警和指挥调度，该系统由两部分组成：一部分是指挥调度系统，由计算机提供辅助决策，实现快捷的接处警调度；另一部分是信息管理系统，它提供数据的录入、查询等操作。使用该系统，能实现实时的监控，方便的数据管理和报表统计等。     

基于GSM/GIS的火灾自动报警系统

基于目前火灾采用人工电话报警，各个楼宇报警系统相互独立，没有与城市消防中心联网实现自动报警。文章充分利用现有的GSM 网络和应用成熟的地理信息系统设计与实现了自动报警系统，将各个楼宇报警系统进行无线联网，做到火灾自动报警。介绍了系统总体架构、通信的实现、MapX应用与发布以及系统的技术特点，并探讨了一些关键技术的实现。     

分布式火灾自动报警网络监控系统的设计与实现

本文讨论利用公共交换电话网将火灾探测报警器连接起来构成分布式火灾自动报警网络监控系统的实现方法和技术，重点介绍了通信控制器的组成和实现，系统建成后使消防报警网络监控中心与各类火灾探测报警控制设备间直接通信，数据共享，透明监控，使消防管理工作由被动式的管理向主动式管理转变，促进了消防管理的科学化和现代化。     

城市火灾自动报警信息系统的设计和实现

为提高城市消防安全水平,设计和实现了一个城市火灾自动报警信息系统．该系统由监控终端、通信网络和信息中心三部分组成,综合采用了通信、地理信息系统和分布式处理等技术,并通过硬件冗余、软件容错等方法来提高系统的可靠性．该系统已在上海市消防行业中全面推广应用．     

基于GIS的应急调度关键技术研究与实现

通过研究GIS技术在应急调度系统中的应用，采用查询定位技术、自动部署技术、图层合并算法和最短路径等相关技术来提高应急调度的自动化和快速化，并在某市消防接处警系统中得到成功的应用。     

基于GIS的城市消防调度系统的研究

通过对基于GIS的城市消防调度系统的功能、体系结构、关键技术等的研究，提出了基于GIS的城市消防系统的解决方案，解决了实现动态消防调度和指挥的问题。     

高档微机ISA总线实验台的设计

本文介绍了将ＩＳＡ总线实验升级到高档微机上所要解决的主要技术问题，给出了实验民原理图。     

8098单片机控制的舵机通用测试台

本文介绍了以８０９８单片机为核心的舵机通用测试台的硬件电路结构和软件设计原理。该测试台利用单片机测控技术,实现了自动给定各类控制信号,自动测量舵面,自动显示测试结果等功能,极大地提高了测试的自动化程度。该测试台具有较显著的经济效益。     

The delayed effect of treadmill desk usage on recall and attention

The treadmill desk is a new human–computer interaction (HCI) setup intended to reduce the time workers spend sitting. As most workers will not choose to spend their entire workday walking, this study investigated the short-term delayed effect of treadmill desk usage. An experiment was conducted in which participants either sat or walked while they read a text and received emails. Afterward, all participants performed a task to evaluate their attention and memory. Behavioral, neurophysiological, and perceptual evidence showed that participants who walked had a short-term increase in memory and attention, indicating that the use of a treadmill desk has a delayed effect. These findings suggest that the treadmill desk, in addition to having health benefits for workers, can also be beneficial for businesses by enhancing workforce performance.     

Cardiovascular and metabolic responses of active sitting while performing work-related tasks

Abstract

Stability balls and active-balance sitting chairs have recently emerged as a way to reduce sedentary behaviours in office settings. The purpose of this study was to determine differences in caloric expenditure and heart rate between a standard chair (SC), stability ball (SB) and active balanced sitting chair (ST) while performing work-related tasks. Participants (n?=?20) performed a 10-minute randomised reading and typing task while sitting on the SC, SB and ST. For both the reading and typing tasks, heart rate (HR), caloric expenditure per minute and metabolic equivalents were all significantly greater (i.e. 6–13%; 19–40%; 18–39%, respectively) while using the ST when compared to the SC and SB. No significant differences were observed between the SB and SC for any of the comparisons. The ST produced a greater HR response and caloric expenditure than the SC or SB, indicating that active balanced sitting may be a feasible way to increase energy expenditure in an office setting.

Practitioner summary: The purpose of this study was to determine differences in cardiovascular and metabolic responses to various forms of office chairs. The key finding was that active sitting on a balance chair significantly increased heart rate and caloric expenditure as compared to a stability ball and standard chair.

Abbreviations: SC: standard chair; SB: stability ball; ST: active balanced chair; HR: heart rate; kcalmin: caloric expenditure per minute; MET: metabolic equivalents     

Ergonomic design of a railway traffic control room: A Serbian experience

The aim of the research presented in this paper is to perform an ergonomic evaluation of compatibility between control desk, display panel, and their control devices with operators’ capabilities in the process of railway traffic control. This paper covers the application of ergonomic criteria for designing the control room and its main elements, functional characteristics of operators, and the influence of illumination on operator’s work efficiency. The paper also introduces methodologies for anthropometric and kinesiological analysis of operators, ergonomic analysis of control desk and display panel, and analysis of illumination in the Railway Traffic Control Room in Nis, Serbia. The research also includes basic statistical parameters for body measures of operators, configuration, and dimension of control desk as a unit, ergonomic analysis of control desk buttons, ergonomic analysis of display panel and its elements, parameters for illumination level of control room, control desk and display panel, and uniformity of illumination and brightness. To establish a link between these research and cognitive demands, methods of cognitive analysis of control and management activities in control room and decision making in abnormal situation by using an operator’s stress model are presented. The importance of this approach is that ergonomic assessment of current condition will determine the inadequate design and the ergonomic approach to be used in the implementation of the analysed control room. The results given in this paper enable the beginning of reconstruction and design of new elements in the control room, which will lead to abettor optimized control of railway traffic.     

一类排队系统模型的计算机模拟

排队系统是离散事件系统最典型的问题之一，本文讨论了服务时间与队长有关的排队系统模拟，在单服务台及串联，并联多服务台情形下，建立了六个模拟模型，并给出模拟模型的计算实例。     

基于全局日志投递的数字电网全链路监控及中台服务优化

随着电力网络的高速发展,电力数据的规模与维数急速增长。为了合理地对电网系统进行管理,需要对数据进行全链路监控。首先介绍了国内外在电网全链路监控的现状,阐述了在新形态下基于全局日志投递的电网数据的概念,中台服务全链路监控正是基于全局日志投递展开的。而其中,较为重要的是数据中台服务的功能。然后,基于全局日志投递功能,合理地构建出中台服务的架构,并对中台服务的全链路进行监控和优化设计。针对中台服务的业务场景进行实现与验证,通过具体的触发指令进行监测,验证该中台服务全链路监控及优化的技术具备通信、数据采集与处理等服务功能,可以统筹用电数据管理和监控的功能,为数字电网新形态下的用户检测、能效管理提供有效的应用价值。     

The effect on sitting posture of a desk with a 10° inclination for reading and writing

Abstract

A pilot study was carried out on 10 subjects to examine the effect that a desk with a 10° inclination had on their sitting posture while reading and writing. A continuous recording of the subjects head and trunk positions was made. Each subject was studied during two periods of 1·5 h on different days. The subject worked at a flat desk on the first day and at a desk with a 10° inclination on the second. On average, the position of the head in the sagittal plane was found to be 6° more erect and the position of the trunk 7° more erect when working at a desk with a 10° inclination than when working at a flat desk. The maximal decrease in load observed on the cervical spine was 35% and on the thoracic spine 95%. The angle between the head and the trunk did not change significantly when using an inclined desk. Differences in posture in the frontal plane were not observed in this study.     

基于文本向量化方法构建IT运维服务台事中处置参考模型

针对传统IT运维服务平台事件全文检索准确度不高及大量历史事件单再利用率低的特点,提出一种基于事件文本向量化处理方法的事中处置参考模型.通过建立生产运维特征词库,将事件工单文本表示成特征向量,并选择合适的算法对不同事件文本特征向量进行相似度计算,最终通过匹配找到平台历史事件或者知识库中与现有事件相似度高的事件或知识,供故障处置人员参考.将此方法应用到企业级服务台事件处置流程中,能帮助运维人员快速准确地找到类似的历史事件或者相关的知识,形成事中处置参考,加快事件处置效率,同时也进一步提高了运维工具的智能化水平.