金属带式无级变速器电液控制系统的试验研究

通过对金属带式无级变速液压控制系统功能进行分析，把该系统分为夹紧力控制和速比控制系统。设计了金属带式无级变速器电—液控制系统，对控制阀特性进行了研究，为夹紧力控制系统和速比控制系统分别设计了控制器。最后对所设计的CVT控制系统进行了实车道路试验，取得了较好的效果。     

浅析钢筋混凝土双曲拱桥的拆除

本文通过对原淮阴市红卫桥拆除过程进行分析总结 ,初步探索了钢筋混凝土双曲拱桥的拆除工艺和方法     

高强力复合土工布在软基路堤中的应用

本文结合工程实例介绍采用高强力复合土工布处理软土地基路堤的设计、施工与应用效果     

Correlation between automotive CO, HC, NO, and PM emission factors from on-road remote sensing: implications for inspection and maintenance programs

Carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxide (NO) emission factors (EFs) are measured with a commercial vehicle emissions remote sensing system (VERSS) during a large-scale vehicle exhaust emissions study in Las Vegas. Particulate matter (PM) EFs are simultaneously measured for individual vehicles with a newly developed PM-VERSS based on ultraviolet backscatter light detection and ranging (Lidar). The effectiveness of CO and HC EFs as proxy for NO and PM EFs for spark-ignition vehicles is evaluated. Poor correlations were found between EFs for pollutants on an individual vehicle basis indicating that high EFs for one or more pollutants cannot be used as a predictor of high EFs for other pollutants. Stronger functional relationships became evident after averaging the EF data in bins based on rank-order of a single pollutant EF. Low overlap between the highest 10% emitters for CO, HC, NO, and PM was found. These results imply that for an effective reduction of the four pollutants, inspection and maintenance (I/M) programs, including clean screening, should measure all four pollutants individually. Fleet average CO and HC concentrations determined by gaseous VERSS were compared with fleet average CO and HC concentrations measured at low-idle and at high-idle during local I/M tests for spark-ignition vehicles. The fleet average CO concentrations measured by I/M tests at either idle were about half of those measured by remote sensing. The fleet average high-idle HC concentration measured by I/M tests was about half of that measured by VERSS while low-idle I/M and VERSS HC average concentrations were in better agreement. For a typical vehicle trip, most of the fuel is burned during non-idle conditions. I/M measurements collected during idling conditions may not be a good indicator of a vehicle’s potential to be a high emitter. VERSS measurements, when the vehicle is under a load, should more effectively identify high emitting vehicles that have a large contribution to the mobile emissions inventory.     

Hub location with flow economies of scale

A characteristic feature of hub and spoke networks is the bundling of flows on the interhub links. This agglomeration of flows leads to reduced travel costs across the interhub links. Current models of hub location do not adequately model the scale economies of flow that accrue due to the agglomeration of flows. This paper shows that current hub location models, by assuming flow-independent costs, not only miscalculate total network cost, but may also erroneously select optimal hub locations and allocations. The model presented in this paper more explicitly models the scale economies that are generated on the interhub links and in doing so provides a more reliable model representation of the reality of hub and spoke networks.     

快速城市化地区公路网规划方法探讨

针对我国快速城市化地区公路发展的客观要求，探讨快速城市化地区采用图论、区位论进行公路网络布局的方法，对适应快速城市化地区特点的公路网规划精度、预留用地要点，分别予以明确。并结合鄞州区公路网规划实践，验证了该方法的可行性。     

旧水泥混凝土路面沥青罩面层的设计与施工探讨

结合316国道十堰段旧水泥混凝土路面的改造工程，介绍旧水泥混凝土路面上加铺沥青面层的结构设计和施工方法，以及玻纤格栅和土工布的应用。     

海湾大桥北引道沥青混凝土罩面设计

结合广东省汕汾高速公路汕头海湾大桥北引道路面加铺工程,分析软基路段过渡性路面的病害,提出沥青混凝土路面罩面结构设计和施工中须注意的问题.     

车辆高速行驶安全的思考

分析了轮胎等汽车部件对行车安全的作用，论述了对ABS和车轮定位参数日常检测的必要性．介绍了电涡流中央制动器的制动原理和使用成本。     

城市高架桥之高独柱墩横向位移探讨

结合城市高架高独柱墩顶部发生横向位移这一现象,对高独柱墩顶部横向荷载产生的原因进行初步分析,并应用三维非线性屈曲分析,阐述组合荷载所引起的大变形及混凝土徐变效应与墩顶横向位移之间的关系,提出了设计、施工类似结构时应注意的事项。