消除公交串车——一种基于GPS与GIS的实时控制方法

城市公共交通系统是一个包含人、车、路、环境、能量和信息的高度非线性的大规模复杂系统。公交串车问题严重降低了公交服务的可靠性，本文综合运用系统工程理论与方法，给出了公交串车与大间隔的定义，提出了公交串车与大间隔问题的成因分析模型、基于BP人工神经网络的行车间隔预测模型和基于GPS与GIS的实时动态反馈控制模型。最后，对北京公交300路车所采集的680组数据进行了实证分析。分析结果表明所使用的方法能有效地消除公交串车问题，同时也能为公交企业自身的运营管理和乘客的出行规划提供有价值的决策参考。     

智能建筑控制总线技术浅析

现阶段建筑智能化工程中控制总线技术应用较多，但各类技术之间差别很大。本文从应用的角度简介和分析这些技术，并对其应用在建筑智能化工程中的特点进行分析，对以太网和无线网络通信技术应用在控制总线领域内的趋势和特点提出自己的意见。     

A piecewise-constant congestion taxing policy for repeated routing games

In this paper, we consider repeated routing games with piecewise-constant congestion taxing in which a central planner sets and announces the congestion taxes for fixed windows of time in advance. Specifically, congestion taxes are calculated using marginal congestion pricing based on the flow of the vehicles on each road prior to the beginning of the taxing window (and, hence, there is a time-varying delay in setting the congestion taxes). We motivate the piecewise-constant taxing policy by that users or drivers may dislike fast-changing prices and that they also prefer prior knowledge of the prices. We prove for this model that the multiplicative update rule and the discretized replicator dynamics converge to a socially optimal flow when using vanishing step sizes. Considering that the algorithm cannot adapt itself to a changing environment when using vanishing step sizes, we propose adopting constant step sizes in this case. Then, however, we can only prove the convergence of the dynamics to a neighborhood of the socially optimal flow (with the size of the neighbourhood being of the order of the selected step size). The results are illustrated on a nonlinear version of Pigou’s famous routing game.     

经济型自动化船舶电站控制方案研究

文章阐述了为达到经济性目的，在现行四机组船舶电站控制技术上提出了一种新型控制网络解决方案。该控制网络由一主站S7．200PLC、一从站S7—200PLC及四从站PPU（发电机同步保护装置）组成，PLC和PPU分别主要控制电站逻辑实现和发电机运行，主站PLC与从站PLC、PPU间的通信分别通过PPI和MODBUS实现。网络通信和控制逻辑均在STEP7-Micro／WIN中编程实现。应用实践证明其经济性提高的同时性能依然卓越。     

高速公路机电工程施工质量控制

结合高速公路机电工程建设的实践，介绍了加强机电工程施工质量管理的措施。     

船用交流电机基于DSP的软启动控制系统研究

交流电机在船舶上的应用非常广泛,但其启动冲击电流比较大,对电网和电机的冲击比较大,因此对电机启动控制的研究非常重要。本文分析介绍了软启动器的特点、用途和其在船舶上的应用,并根据软启动器的原理,利用DSP和晶闸管,设计了一个基于DSP控制的调速系统。通过控制晶闸管的导通角度和导通时间,来实现电机的平滑启动,以降低启动对电网和电机的冲击。最后对电机的软启动控制系统进行了分析。     

Effectiveness of roadside crash countermeasures

In this article, an "intelligent" airline seat inventory control system is developed. Applications of the system are considered for both nonstop flights and flights with stopovers. The system developed is able to recognize a situation characterized by the number of reservations made by individual passenger classes and the number of canceled reservations at a certain moment in time before departure. The system can also make the appropriate decision without knowing the functional relationships in effect between individual variables. As in other intelligent systems, the "intelligent" airline seat inventory control system proposed here is able to generalize, adapt and learn based on new knowledge and new information. The "intelligent" airline seat inventory control system is based on fuzzy logic. The system makes on-line decisions as to whether to accept or reject any passenger request using established fuzzy rules. The "intelligent" system's results are compared with those of the EMSR model for nonstop flights. The results for flights with stopovers are compared with those obtained using integer programming. The final conclusions are very promising.     

填石路基施工技术及质量控制分析

填石路基可以有效地减少施工用土量,降低施工成本,但是由于其填料的特殊性也使其施工难度增大,技术要求更高。文章通过对填石路基施工流程和特点的分析,对填石路基的施工技术进行了研究,并提出了填石路基质量控制的方法。     

浅议高速公路项目业主质量管理措施

文章以广西某高速公路质量管理工作为例,分析了高速公路项目业主质量管理存在的主要问题,阐述了高速公路项目业主质量管理措施。     

河池至都安高速公路典型示范工程过程控制措施探讨

文章结合河池至都安高速公路工程实例,介绍了该项目典型示范工程在"人本化、专业化、标准化、信息化、精细化"的原则要求下,实施过程控制的相关措施,为山区高速公路典型示范工程建设提供参考。