浅议高性能混凝土及其在桥梁工程中的应用

介绍了高性能混凝土的含义、性能、配制要求及其在桥梁工程中的应用。     

A Multiple Model Approach to Modeling Based on Fuzzy Support Vector Machines

A new multiple models (MM) approach was proposed to model complex industrial process by using Fuzzy Support Vector Machines(F_SVMs). By applying the proposed approach to a pH neutralization titration experiment, F_SVMs MM not only provides satisfactory approximation and generalization property, but also achieves superior performance to USOCPN multiple modeling method and single modeling method based on standard SVMs.     

Robust Stability and Performance Comparison of PID and PPI Control

Predictive PI (PPI) control form, capable of time delay compensation, has been put forward recently.This control algorithm is essentially a PI controller with enhanced derivative action, which is not only suitable for long time delay process, but also of simple structure and excellent robust stability. The performance of PPI controller was demonstrated and compared with that of traditional PID controller by different tuning methods.     

�о����п��ٹ�·��ͨ���ķ�����ѧ����

分形几何是一门新兴的数学分支，它是一个研究和处理自然与工程中不规则图形的强有力的理论工具本文用分形插值函数的图象来表示随时间变化很强的交通流的曲线.首先，通过测量的交通流量的离散时间一流量坐标数据，用分形插值函数方法模拟交通流整体函数的图像.然后，应用分形插值函数的思想，根据交通流普遍存在统计上的自相似性，提出分形预测方法.最后，对以后的工作进行了展望.     

浅谈水泥砼道路施工中不可忽视的几个问题

通过对路基施工质量、基层材抖强度、砼材料选择、施工控制等影响水泥砼路面施工质量的若干方面的论述,较全面地总结了施工中应注意的问题,并提出了解决问题的方法和措施。     

超薄白色罩面(UTW)脱空应力分析

采用ANSYS软件对UTW路面结构的脱空进行了分析,探讨了板底未脱空时板受力特性及板分别出现不同程度的纵缝边缘脱空、横缝边缘脱空和板角脱空情况下的混凝土板受力特性,并结合直道疲劳试验的应变观测及芯样观测结果对有限元分析的结论进行验证,指出在设计及施工时应采取措施切实保证UTW层间粘结,保证UTW在荷载下不过早破坏.     

工程施工质量保证体系

质量保证体系遵循“计划—实验—施工—检查—总体—纠正错误”的质量管理运行机制 ,根据质量管理流程图 ,制定全过程质量体系各职能人员的质量职能 ,履行实施质量目标任务 ,从而保证全过程的质量目标以实现达到创企业信誉 ,树企业形象 ,求企业发展的其真正目的     

Control-Relevant Identification Test Design for Open-Loop Experiment

An optimal experiment design (DED) with respect to the use of designing model-base controller was studied. The mean squared error at the setpoint is chosen as the performance criterion. Simple design formulas are derived based on the asymptotic theory. The signal is used for the open loop experiment. The design constraint is the power of the process signal or the process input signal. The results give guideline for identification application.     

HXD1C电力机车辅助变流器风道数值模拟及试验研究

对HXD1C电力机车辅助变流器用理论计算确定散热器尺寸,通过经验公式计算散热系统所需风量,用CFD软件FLUENT对风道散热系统进行了三维数值模拟分析,求解散热系统的温度场分布.通过与试验结果进行对比研究,表明计算结果满足工程运用所需的精度要求,可应用于类似系统的热分析中.     

CZDF型常用制动装置一起列车管减压不足的原因分析及判定

针对一起CZDF型常用制动装置发生的列车管减压量不足的故障现象进行了认真分析,找出故障所在,并总结出了一个合理、快速的检修方法.