公路外场监控数据传输与对象规范研究

随着智能交通系统(ITS)的发展,ITS通信网中出现了数据源与数据的多样性等诸多因素,造成了监控中心与外场设备之间不能建立实时信息沟通.在研究了ITS的通信协议架构的基础上,改进了协议体系和编码规则,规范了可变情报板等外场设备的数据对象,统一了数据格式与通信规约,更好的实现了监控中心与外场设备之间数据交互的互操作性和可...     

A review of methods of low alcohol and alcohol-free beer production

The increasing interest of consumers in health and alcohol abuse issues motivates breweries to expand the assortment of products with low alcohol content. The goal of producing beers with low alcohol content can be achieved by two main strategies; namely by gentle removal of alcohol from regular beer and by limited ethanol formation during the beer fermentation. Within these two basic strategies, there are a number of techniques that vary in performance, efficiency and usability. This paper presents an overview and comparison of these techniques and provides an evaluation of sensorial properties of low-alcohol and an alcohol-free beer produced as well as suggests possibilities for their additional improvement.     

生长温度对Mn掺杂ZnO纳米棒铁磁性的影响

用化学气相沉积法(CVD),在生长温度为600、650和700 ℃条件下,未采用任何催化剂制备了Mn掺杂ZnO纳米棒.研究发现,随着生长温度的升高,样品中O空位的浓度逐渐增加.低浓度的O空位可以增强Mn掺杂ZnO纳米棒的铁磁性,但O空位浓度过高时,Mn掺杂ZnO纳米棒表现出超顺磁性或反铁磁性.在3个样品中,650 ℃的样品具有最好的室温铁磁性,其饱和磁化强度为0.85 μB/Mn,矫顽力为50 Oe.     

载波技术在配电网自动化系统中的应用

指出了在配电网管理和配电自动化系统实施过程中,通信是最为棘手的事情之一,其设计的合理性直接影响了ＤＭＳ／ＤＡ系统的成败,利用配电线载波技术具有诸多优点。对配电线载波技术进行了介绍,比较了其与传统的电力载波的异同。     

The Connotation of Digital Manufacturing Science and Its Expectation

1A Review of the Development of Manufacture and Manufacturing Science“Upstanding andlabor create the human being,andlabor begins with manufacturingtool”,so manufactureis the basis of human being’s existence and development . We canthinkthat thereis no human being’s existencewithout manufacture ,so manufacture develops withthe progress of human being,and manufacturingtechnologydevelops with the development of the human society.In the long process of history, manufacture developedfroma ski…     

组件技术在配电管理系统开发中的应用

在讨论DMS及其功能的基础上，通过分析DMS的现行开发体系，提出了用组件技术开发DMS应用系统的设计思想，并分析了基于多层组件体系结构开发DMs的可行性和系统设计方法与技巧。