脱硫粉煤灰致半刚性路面基层开裂的原因及对策

对使用了脱硫粉煤灰作为路面基层材料,从而引起路面开裂及不均匀沉降的原因和机理进行了分析.通过试验分析,比较了二灰稳定层和二灰碎石层的体积稳定性,重点分析了二灰碎石层的体积变化随浸水时间的规律.进而提出了改良处理方法的理机和思路,并提出了物理改良和化学改良两类处理方法,最后分别介绍了几种可能的改良处理方法的原理和依据.     

HBT50混凝土泵泵送混凝土过程中的故障及处理方法

简要介绍了HBT50混凝土泵的基本组成,详细分析了该泵在输送混凝土过程中的故障及处理方法。     

无腹式拱桥的静力特性理论研究

通过对国内某桥的有限元分析,研究了无腹式拱桥这种新式桥型在各种荷载下的静力特性,为设计施工、工程竣工验收以及新技术的推行提出了可供参考的依据。     

NUMERICAL ANALYSIS FOR VIBRATION CONTROL OF BEAMS WITH ACTIVE CONSTRAINED LAYER DAMPING TREATMENTS

IntroductionThe conventional passive constrained layerdamping (PCLD) treatments[1～ 3] are applied tomachines and structures widely over the lastcentu-ry because they are reliable and simple,however,they are not intelligent. Once the damping treat-ments are installed,they can not be adjusted andcan not adapt themselves to changeable environ-ment.Recently,active damping has received in-creasing attention in the aeronautic and astronauticindustries because of its significant and adjustabledamp…     

车辆协同巡航控制系统设计改进与试验评价

为提高交通流运行的机动性、稳定性,对车辆协同巡航控制(CACC)系统进行了改进设计. 基于经典Newell 模型提出了考虑CACC的改进跟驰模型,分析了所提出的CACC改进跟驰模型的动力学特性,给出了CACC改进跟驰模型的线性稳定性条件,并对由CACC车辆和非CACC车辆组成的非均匀车队的不同无线通讯拓扑结构进行了比较研究. 通过数值试验进一步研究了在起步、刹车和意外事件的情况下,CACC车辆的存在对交通流动力学的影响. 研究结果表明,通过合理设计CACC跟驰系统的模型参数取值后,CACC车辆的存在一方面可以提高交通流运行的机动性与稳定性,另一方面可以使交通出行更加的安全和舒适. 此外,由于不同车队中CACC车辆的无线通讯拓扑结构会影响交通流的机动性与稳定性,对于 CACC车辆的无线通讯拓扑结构应慎重的设计与优化.     

Simulation of Old Urban Residential Area Evolution Based on Complex Adaptive System

On the basis of complex adaptive system theory,this paper proposed an agent-based model of old urban residential area,in which,residents and providers are the two adaptive agents.The behaviors of residents and providers in this model are trained with back propagation and simulated with Swarm software based on environment-rules-agents interaction.This model simulates the evolution of old urban residential area and analyzes the relations between the evolution and urban management with the background of Chaozhou city.As a result,the following are obtained:(1) Simulation without government intervention indicates the trend of housing ageing,environmental deterioration,economic depression,and social filtering-down in old urban residential area.If the development of old urban residential area is under control of developers in market,whose desire is profit maximization,and factors such as social justice,historic and culture value will be ignored.(2) If the government carries out some policies and measures which will perfectly serve their original aims,simulation reveals that old urban residential area could be adapted to environment and keep sustainable development.This conclusion emphasizes that government must act as initiator and program maker for guiding residents and other providers directly in the development of old urban residential area.     

舰船事故配电系统优化设计

分析了国内外舰船事故配电系统的现状，并着重对国内新型舰船的事故配电系统优化设计作了介绍。     

浅谈物流标准化的现状及其对策

为了建立高效率的物流体系,实现我国物流与国际物流的顺利接轨,增强我国物流业的国际竞争力,必须把物流标准化工作提到前所未有的高度上来,从战略的高度看待物流标准化工作,对物流标准化进行深入的研究,推动我国物流业的发展。     

浅析化工专业英语特点及教学方法

文章通过分析化工专业英语无机化合物英文命名教学过程中存在的普遍规律,帮助学生尽快掌握无机化合物的英文命名。     

硬质合金拉拔模及摩擦学的发展分析

文中介绍硬质合金拉拔模的发展历史过程,同时对塑性加工摩擦及其相关理论、技术发展方向、润滑等方面进行了阐述。