南大梁高速公路华蓥山特长隧道地质选线

在阐述华蓥山地区的地质环境特征,对特长隧道通过岩溶、采空区、煤矿等复杂地质条件存在的主要工程地质问题进行评价的基础上,总结了复杂地质条件下特长隧道工可阶段路线选择的原则,地质因素是确定路线的重要依据。     

贵阳绕城高速公路煤矿下伏采空区治理技术研究

贵阳绕城高速公路煤矿采空区治理技术研究是在勘察调查的基础上,对不同地质条件、不同采矿类型的采空区进行综合分析,对路线通过采空区区段进行稳定性、危害性分析与评价,为路线比选提供依据,进而提出采空区治理方案。     

遥感技术用于京广高速公路粤境北段方案比选

京广高速公路粤境北段位于南岭山脉的瑶山地区,地形起伏大,植被十分发育,丛林密布,大部地质信息被掩盖,交通非常不便,使常规的公路工程地质工作造成了很大的困难。但采用遥感技术,充分利用遥感影像的大量地质信息及视城开阔的优势,对区内地质构造特征及其活动性等不良地质进行了解释,并作出了区域稳定性及工程地质条件的评价,弥补了常规地质工作的不足。为降低工程造价,选扦最佳方案提供了较充分的工程地质依据。就该路段采用“TM”卫星影像进行遥感地质工作作了较为详细的介绍。     

山岭区复杂地质高速公路地质选线方法

地质选线是山岭区高速公路路线设计的重要原则之一.根据重庆酉阳～黔江高速公路、重庆三环高速公路铜永段、重庆秀松高速公路、重庆涪丰石高速公路、四川遂资眉高速公路、四川成德南高速公路等项目工程地质选线实践,分析了山岭区高速公路地质选线的工作方法及重点,提出了“八宜八不宜”原则,并将其应用于工程实际中,对类似工程路线设计具有一定的借鉴意义.     

宁杭高速公路工程地质条件综述

介绍宁杭高速公路的工程地质条件．对其岩土层分布及其相应不良地质与特殊工程地质问题进行了分析和阐述,并进行了相应工程地质评价,对工程建设和设计提出结论性意见和建议。     

湖北宜昌至巴东高速公路地质勘察总结及经验浅析

湖北省宜昌至巴东高速公路穿越三峡库区,地质条件复杂多变,不良地质种类繁多,地质灾害广泛分布,勘察难点层出不穷。针对测区地形地貌、地层岩性与地质构造实际并结合公路工程特点,采取了TM遥感图象解译、工程地质调查测绘、物探、钻探等多种手段相结合的综合勘察。在勘察施工过程中,提出了综合勘察+专题研究的勘察形式,查明了宜巴高速公路工程地质条件,为设计提供了可靠的地质依据。     

遥感技术应用于公路工程地质勘察

遥感技术可以真实、客观地记录地质体的多种特征和地貌。通过对遥感图象的解译，可查明地质体的类别和分布、地质构造特征、不良工程地质条件等。遥感技术应用于太旧高速公路，为工程顺利实施，提供了地质方面的准备。     

经乌高速公路主要工程地质问题及地质选线研究

以经乌高速公路为研究对象,通过对前人地质选线思路的分析,总结研究了沿线主要的工程地质问题,并根据研究区工程地质特征制定地质选线原则,针对各线路的实际特点从多角度对路线方案进行地质选线研究。     

遥感解译在京承高速公路勘察设计中的应用

主要阐述了遥感地质解译在山区高速公路勘察设计中的应用概况。通过对航片全方位的地质解译,进一步对全线水文地质、工程地质特征以及不良地质现象有了系统的认识和了解,从而对山区高等级公路的路线方案的选取提供了较好的地质依据。     

丹拉公路宣化(下八里)至冀蒙省界段高速公路工程地质特征及区域稳定性评价

主要介绍了路线穿越区的区域地质、水文地质及工程地质特征概况,通过对全线岩土体结构、构造及物理力学参数的分析研究,对路线穿越区所遇到的工程地质问题及区域稳定性进行了较为详细的阐述和评价,同时对路线设计和施工提出了切合实际的结论和建议。     

基于效用模型的沥青路面预防性养护研究

预防性养护是一种高标准养护方式。在预防性养护中,养护时机的选择至关重要。基于此,提出了以建立养护短期效用预测模型来进行养护时机的选择,该模型通过对路面性能短期提高值以及养护后路面性能衰变规律的预测,能较为精确地获得养护后路面性能曲线,以及养护短期效益值,进而运用效益-费用分析法可以较方便而准确地确定最佳养护时机和养护方案。养护效用预测模型为预防性养护的研究提供了新思路,具有重大的理论意义和实际意义。     

Experimental study of the physical and chemical characteristics of biodiesel blended fuel using ultrasonic energy irradiation

The purpose of this study is to understand the physical and chemical characteristics of biodiesel blended fuel reformed by ultrasonic energy irradiation. To do this, a mixture of commercial diesel fuel and biodiesel was compared and analyzed according to whether or not ultrasonic energy irradiation was performed and the duration of irradiation. The results of the experiments indicate that when ultrasonic energy irradiation was performed on biodiesel blended fuel, its viscosity decreased by 3–7%. In the case of BD20, when ultrasonic energy irradiation was performed, its Sauter mean diameter (SMD) dropped by 12% on average. As the irradiation duration increased, the volume ratio of olefins increased up to a maximum of 2.7%, and the higher heating value increased to a maximum of 5.8%. On the contrary, the ratio of aromatics decreased by a maximum of 2.7%, and BI decreased by a maximum of 7%.     

快速公交(BRT)智能系统框架结构研究

以智能交通系统（ITS）为研究背景,针对快速公交系统的运营模式及主要特征,提出了适合我国公交现状的快速公交智能系统框架结构,同时对智能系统进行了较为翔实的分析和设计。     

Design of Integrated Chassis Control logics for AFS and ESP

The performance of most electronic chassis control systems in the past has been optimized individually. Recently, a great research effort has been dedicated to the integration of chassis control systems in an effort to improve the vehicle performance. This involves orchestration of individual control modules so that they can jointly contribute to the enhancement of their control effect. In this research, two integrated control logics for AFS (Active Front Steering) and ESP (Electronic Stability Program) have been developed. Of the two logics, one uses a supervisor that rules over the individual modules. The other logic uses a CL (Characteristic Locus) method, which is a frequency-domain multivariable control technique. The two logics have been tested under various driving conditions to investigate their control effects. The results indicate that the proposed integrated control logics can yield vehicle performance that is superior to that of the individual control modules without any integration scheme.     

Effect of intake valve swirl on fuel-gas mixing and subsequent combustion in a CAI engine

A fully three-dimensional model was used to investigate the optimal value for intake valve lift in a CAI engine. Uniform mixing in the engine is a key parameter that affects the auto-ignition reliability and thermal efficiency. The method of intake of the air supply often determines the uniformity (or quality) of the fuel-air mixture. In this paper, four strategies were applied for controlling the swirl intensity of intake air. The variation of the intake valve lift induces different swirling and tumbling intensities. Both experimental data and 1D WAVE software (Ricardo, Co.) were coupled with the 3D model to provide pressure and temperature boundary conditions. The initial condition of the EGR mass fraction was also provided by the 1D model. The benchmark scenario (Case 1) was considered as a valve lift with 2 mm for all intake valves. We found that an intake valve lift of 6 mm with the other intake valve closed (i.e., Case 5) yielded the largest swirling (helical motion in the axial direction) and tumbling, which in turn rendered optimal fuel-gas mixing. We also found that fuel distribution affected the auto-ignition sites (or spot). The better the mixing, the greater the gas temperature and combustion efficiency achieved, as seen in Case 5. The NOx level, however, was increased due to the gas temperature. The optimal operating condition is selected from the viewpoints of environmental protection and combustion efficiency.     

地下掘进之地盘——机械互制与可挖指标研探

地下机械式之掘削效率乃为进度、成本及品控之关键要因,一般工程思考皆多考虑工法与机型对应各类不同地层之"可挖性"作探讨,即针对地质材料选择适应之切削面盘,鲜能再对地盘——机械开挖互制行为作一"适确性"研析,而本研究先由微观之量纲分析及力学尺度探讨并建立指标,运用至巨观推力、扭矩之施工良窳、可挖性及正常施作或异况破坏之分析。机械式掘削接触地质与产生之互制行为相异性极大,故由地质破坏特征作为切削地盘材料之分类,藉此提供该广义式之探讨方针;其次在施工判准所建立之可挖指标上,使用量纲分析方法进行具代表力学行为之因子解析,作为建置指标的依据;再者,应用现场调查以资搜机械式开挖所量测的推进力系数值,进而佐证其适确性,最终完整研析机械式掘削开挖之行为与可挖性指标之应用。     

Design of ANFIS networks using hybrid genetic and SVD methods for modeling and prediction of rubber engine mount stiffness

Genetic Algorithm (GA) and Singular Value Decomposition (SVD) are deployed for optimal design of both the Gaussian membership functions of antecedents and the vector of linear coefficients of consequents, respectively, of ANFIS networks. These networks are used for stiffness modelling and prediction of rubber engine mounts. The aim of such modelling is to show how the stiffness of an engine mount changes with variations in geometric parameters. It is demonstrated that SVD can be optimally used to find the vector of linear coefficients of conclusion parts using ANFIS (Adaptive Neuro-Fuzzy Inference Systems) models. In addition, the Gaussian membership functions in premise parts can be determined using a GA. In this study, the stiffness training data of 36 different bush type engine mounts were obtained using the finite element analysis (FEA).     

Design of an energy management strategy for parallel hybrid electric vehicles using a logic threshold and instantaneous optimization method

A novel parallel hybrid electric vehicle (PHEV) configuration consisting of an extra one-way clutch and an automatic mechanical transmission (AMT) is taken as the study subject of this paper. An energy management strategy (EMS) combining a logic threshold approach and an instantaneous optimization algorithm is developed for the investigated PHEV. The objective of this EMS is to achieve acceptable vehicle performance and drivability requirements while simultaneously maximizing engine fuel economy and maintaining the battery state of charge (SOC) in its rational operation range at all times. Under the MATLAB/Simulink environment, a computer simulation model of the studied PHEV is established using the bench test results. Simulation results for the behavior of the engine, motor, and battery illustrate the potential of the proposed control strategy in terms of fuel economy and in keeping the deviations of SOC at a low level.     

基于车联网的智能车载终端研制

分析车联网的作用及意义,以及目前国内外现状;提出车载智能信息终端平台解决方案,设计开发核心控制模块与终端样机,并进行模块测试和实车验证。     

基于SIP协议的高速公路VoIP网关的设计和实现

基于SIP协议,提出了一种应用于高速公路监视控制系统的VoIP接听控制网关模块的设计与实现。通过该模块的使用可以避免计算机网络和电话网络的重复建设,提高线路的协同工作效率,同时用此模块取代传统的PBX,可大大降低设备运行维护成本。