连续梁桥施工控制结构分析的可视化研究

利用面向对象的技术实现了连续梁桥施工控制中结构计算数据的可视化。     

圆坯连铸机结晶器的温度数据分析

介绍了圆坯连铸结晶器温度测量系统的组成,详细说明了热电偶应用中的技术措施,如热电偶的选择,测点位置及寿命等.为了消除电磁搅拌(EMS)对测量信号的干扰,系统设计了FIR低通数字滤波器,应用窗函数法对测量信号进行滤波,并对滤波效果进行了分析.该系统应用在电炉厂现场,在不同的EMS电流和频率等条件下,检测到的温度信号均匀、稳定,取得了良好的抗干扰效果.     

Fast Nearest-Neighbor Query Processing in Moving-Object Databases

A desirable feature in spatio-temporal databases is the ability to answer future queries, based on the current data characteristics (reference position and velocity vector). Given a moving query and a set of moving objects, a future query asks for the set of objects that satisfy the query in a given time interval. The difficulty in such a case is that both the query and the data objects change positions continuously, and therefore we can not rely on a given fixed reference position to determine the answer. Existing techniques are either based on sampling, or on repetitive application of time-parameterized queries in order to provide the answer. In this paper we develop an efficient method in order to process nearest-neighbor queries in moving-object databases. The basic advantage of the proposed approach is that only one query is issued per time interval. The time-parameterized R-tree structure is used to index the moving objects. An extensive performance evaluation, based on CPU and I/O time, shows that significant improvements are achieved compared to existing techniques.     

灰色数列预测模型在热工对象模糊控制中的应用

针对现有很多热工过程控制系统“大时滞”特点与典型模糊控制器在应用中的不足，结合灰色系统预测理论在对连续时间事件预测的良好性能，该文基于热工过程控制输入信号的特点，建立了在线算法简单的灰色数列预测模型，仿真及其改进模型，并经仿真研究后证实模型具有较好的预测性能。该方法很好的一个特点是在线计算简单、易于硬件实现，可以推广应用在热工控制领域。     

防爆起重机的进一步完善

随着化工及军工企业的扩建，防爆起重机作为一种特殊用途的起重机需求量与日俱增，寻求设计出更为先进实用的产品来满足生产的需要已成为起重机生产厂的目标。目前在防爆起重机的变频调速不很成熟的前提下，对双速电机的控制方案作进一步改进已成为必要。     

Supply Chain Management in Food Chains: Improving Performance by Reducing Uncertainty

This paper investigates the impact of Supply Chain Management on logistical performance indicators in food supply chains. From a review of quantitative and more qualitative managerial literature, we believe that Supply Chain Management should be concerned with the reduction or even elimination of uncertainties to improve the performance of the chain. The following clusters of sources of uncertainty are identified: order forecast horizon, input data, administrative and decision processes and inherent uncertainties. For each source of uncertainty, several improvement principles are identified. A case study was conducted in a food chain in which a simulation model helped quantify the effects of alternative configurations and operational management concepts. By comparing this simulation study with a pilot study, the model is validated against real data, and organisational consequences are identified. The results of the case study suggest that reduction of uncertainties can improve service levels significantly, although current supply chain configurations restrict possible benefits. The availability of real-time information systems is found to be a requirement for obtaining efficient and effective Supply Chain Management concepts.     

总体评价法在非线性控制系统极限环振荡研究中的应用

本文简要介绍了总体评价法在研究非线性控制系统极限环振荡方面的理论和应用。文中提供了大量例子说明总体评价法的正确和可信。总体评价法只需用少量的图和表就能方便地掌握系统中各种不同大小的非线性因素处于系统各种不同位置时，对系统动态性能的定性和定量影响，从总体上揭示非线性系统的各种特点。这无疑可以改进系统设计和改善运行性能。     

Interleaving Planning and Robot Execution for Asynchronous User Requests

ROGUE is an architecture built on a real robot which provides algorithms for the integration of high-level planning, low-level robotic execution, and learning. ROGUE addresses successfully several of the challenges of a dynamic office gopher environment. This article presents the techniques for the integration of planning and execution.ROGUE uses and extends a classical planning algorithm to create plans for multiple interacting goals introduced by asynchronous user requests. ROGUE translates the planner';s actions to robot execution actions and monitors real world execution. ROGUE is currently implemented using the PRODIGY4.0 planner and the Xavier robot. This article describes how plans are created for multiple asynchronous goals, and how task priority and compatibility information are used to achieve appropriate efficient execution. We describe how ROGUE communicates with the planner and the robot to interleave planning with execution so that the planner can replan for failed actions, identify the actual outcome of an action with multiple possible outcomes, and take opportunities from changes in the environment.ROGUE represents a successful integration of a classical artificial intelligence planner with a real mobile robot.     

首钢板坯连铸机改造工程设计及投产

介绍了首钢第二炼钢厂双流大板坯连铸机高效化改造工程项目的设计及投产情况。重点介绍了连铸机改造机型的确定、为提高生产能力和产品质量而采取的主要技术措施、工艺设备改造主要内容、改造前后铸机主要技术参数对比以及工程项目施工投产情况等。     

在CSP线生产V微合金化钢的探讨

分析了V微合金化钢的强韧化机理及CSP生产线的工艺特点，探讨了V微合金化技术在CSP生产线应用的可行性和应注意的主要问题。V微合金化钢控轧控冷工艺技术特点是再结晶轧制与加速冷却相结合，而这一控制轧制特点正是CSP工艺的特征和优势。国外CSP线在投产之后已成功将V微合金化技术应用于该领域，并形成了不同系列。