S7-300PLC构成PROFIBUS-DP网络的原理及应用

讨论用PLC构成PRORBUS-DP网络系统的方法.首先介绍DP网的概念和实现,然后结合一个实际的例子来着重阐明用PLC来实现DP网络的解决方法.     

铁路行车安全实时监控的研究与实现

针对铁路行车安全中的实时监控问题,基于B/S模式,运用ASP+XMLHTTP技术实现对实时监控界面的粒状更新以及处理通知书的自动打印,克服了C/S模式的弊端,具有实用和维护方便等优点.     

钢轨动态管理与决策系统的研究与实现

论述钢轨动态管理与决策系统的架构及各功能模块的研究与实现,特别对系统的权限管理、钢轨伤损预测和智能决策支持技术进行了较为深入的探讨.     

基于B/S模式的车站装卸作业和计划报请系统

介绍兰州铁路局为适应TMIS分局货调系统的实施而开发的基于B/S模式贷运站装卸作业阶段报告及计划报请系统的结构和功能.该系统已在兰州铁路分局进行试点,并即将在兰州铁路局范围内投入使用.     

驼峰信号微机监测系统远程监控功能软件设计

设计驼峰信号微机监测远程监制系统的体系结构,简要阐明远程控制软件工作模式与原理.根据实际要求设计出远程操作和控制实现方法,同时给出了确保系统有效安全策略及实现方法.     

Road traffic conditions in Kenya: Exploring the policies and traffic cultures from unstructured user-generated data using NLP

Road traffic accidents (RTA) are a prevalent cause of fatality with African countries having the highest fatality index (25–34 per quota). The World Health Organization estimates Kenya's fatality rate due to RTA at 28 per quota. From literature, the country's fatality and injuries have increased by 26% and 46.5%, respectively, since the year 2015. The country is faced with incomplete RTA data capturing, hindering effective planning and policy adjustments to curb the menace. In this paper, we scrapped user-generated data (Twitter) and national transport and safety authority's (NTSA) reports to shed light on traffic safety, practices, and cultures in the country. To this end, we gathered 1,000,000 tweets and 8000 speeding entries between 2015 and 2021 and performed natural language processing (NLP) and quantitative study of the data. We applied NLP and n-gram search of keywords to categorize data into 8 topics: traffic, public service vehicle (PSVs), policing, accident, infrastructure, recklessness, robbery, and corruption. From the data, policing, which touches on all police and law-enforcement-related activity was found to be highly correlated with PSVs, recklessness, accidents, traffic congestion, robbery, infrastructure, and corruption with indices of r(76) = 0.92, 0. 91, 0.87, 0.82, 0.81, 0.76, and 0.70, respectively with p < 0.001. The topic modeling confirmed the identified topics to be the latent discussion issues affecting the public. From the study, PSVs, policing and traffic flow were isolated as key issues that ought to be addressed immediately. The research recommended the integration of driver monitoring systems to strengthen policing. The research, which utilized unstructured data, points to the utility of data mining which would greatly benefit traffic research, particularly African-based studies, that suffer from data inadequacy.     

Kinetic spectrophotometric method for determination of amlodipine besylate in its pharmaceutical tablets

A simple and sensitive kinetic spectrophotometric method has been developed and validated for determination of amlodipine besylate (AML). The method was based on the condensation reaction of AML with 7...     

基于B／S结构的铁路车站管理信息系统的应用

随着Internet/Intranet技术的不断发展和完善，利用Internet/Intranet技术开发企业管理信息系统，已经成为实现企业信息管理自动化的重要手段，本文，以大庆站综合信息管理计算机网络系统的开发为背景，对基于B／S（浏览器／服务器）结构，利用ASP，Active X和Oracle数据库技术，对铁路车站的管理信息系统的功能与结构的设计进行了较详细的研究。     

分布对象技术构建企业应用系统

在简要介绍了分布计算相关技术后，针对企业ERP技术平台及应用模型所应具有的特点分别进行了技术上的分析．通过对CORBA、COM 、J2EE、WebService等分布式框架中的技术及应用性能进行较为系统的研究和比较，结合企业的需求，采用CORBA作为企业ERP的技术平台．CORBA具有跨平台、跨网络、跨语言、跨协议、跨版本、开发商中立等诸多特性，它的极强的适应性比较适合企业当前及长远发展的需要．对于应用模型，设计了一种基于CORBA的C／S和B／S混合模型，此模型中的B／S部分，采用四层浏览器-Servlet-CORBA-EIS结构，对整个模型进行了详尽的论述和分析．最后给出了一个应用这种模型的正在企业良好运行的ERP的一个功能模块——供暖收费系统．     

基于B/S模式的机车信号检测数据分析系统

结合当今比较流行的计算机技术,研究了一种新型的基于浏览器/服务器（Browser/Server,简称B/S）模式的机车信号检测数据分析系统,给出了系统设计原理和实现方法.