Petri-net based modelling approach for ALFRED reactor operation and control system design

In this work, the Petri-net modelling approach applied to the control system design of the Advanced Lead Fast Reactor European Demonstrator (ALFRED) is presented, paying particular attention to the startup procedure. The reactor startup is the operational transient in which all the systems of the plant are brought from the cold shutdown condition to the full power mode, close to load-frequency control. In this phase, the several control actions to be taken need to be properly coordinated. To this end, the operational sequence which constitutes the reactor startup procedure has been described by adopting the Petri-nets approach, i.e., a useful formalism for the modelling and the analysis of Discrete Event Systems. Thanks to this quantitative representation, it is possible to easily derive the corresponding control scheme. In addition, the Petri-nets approach has been also exploited for the two-level control system architecture, namely a master system coordinates the operation of the plant by sending suitable signals to the slave system, in which feedback controllers are implemented. As a major outcome of this work, the procedure for the reactor startup and the transition to the full power mode has been simulated in order to assess the control system performance.     

X波段捷变频磁控管的研究

分析了捷变频磁控管在研制过程中关键零部件对磁控管性能的影响,并在设计方面给出了预防措施。     

ZZ18000/25.5/50型四柱支撑掩护式支架的研制与应用

介绍了ZZ18000/25.5/50型四柱支撑掩护式支架的主要技术参数、结构特点以及该支架作为快速搬家专用巷道支护支架在回撤巷道中的应用。该支架可实现对回撤巷道的提前支护,缩短了搬家倒面的时间,提高了综采设备的利用率。     

基于OTN技术的大颗粒业务大连接承载模式研究

近年，各类专线业务的“大带宽、低时延、快响应”诉求愈加明显，对传送网的承载能力提出更高的要求，特别是其中N*10G 业务需求规模逐年增加， 有必要研究一套标准化的承载模式来满足业务接入的需求，以实现对业务连接的网络承载模式标准化、快速化、智能化。     

基于高职院校学生就业创业特性的职业发展教育研究

对高职院校学生目前就业创业现状及特性进行分析，提出实施学生职业发展教育体系的构建，以促进职业发展教育的开展。     

Asymptotic Analysis of Quick Service Systems with Nonhomogeneous Structure

An asymptotic distribution of the instant of first failure in models with quick service, structural heterogeneity, and variable service discipline is investigated.     

水电站调节保证快速计算方法的探讨

依据有关规范和调节保证计算的原理，通过公式的演变推导，研究和拟定了查算图表的快速计算方法，减轻了水电站调节保证计算的工作量。本法对水电站规划和可研阶段选定合理的枢纽布置方案等有实用价值。文中并列举应用实例。     

矩阵方程AX＋YB=C的快速算法

改进了Ｒｏｔｈ定理的证明并给出矩阵方程ＡＸ＋ＹＢ＝Ｃ的快速算法。     

我国工业化粮食食品发展探讨

本文侧重于进入主食领域的、经过一定规模工业化加工的粮食食品,回顾了它的悠久历史,分析了现状及影响消费趋势的各种因素,最后对中国工业化粮食食品沿科学化、多样化和方便化道路发展的前景提出了设想。     

数字技术与控制理论发展的思考

论述了国内外自动化科学与技术的发展动态,结合北京科技大学机器人研究所20年来的技术开发与控制理论的研究探索,提出了数字技术与控制理论发展的思考,