中心城区大跨度大断面隧道爆破施工技术

广深港客运专线深港隧道位于深圳市中心城区,由单洞双线过渡到双洞单线,采用矿山法施工。结合深港隧道工程实践,介绍在中心城区大跨度、大断面爆破施工技术。     

地铁柔性接触网线岔检调标准的制定与应用

根据以往运行经验,结合西安地铁2号线的实际情况,从支柱定位、线岔交叉点、始触区、接触线高度、线岔定位拉出值等方面,对柔性接触网线岔的检调标准进行深入研究、分析并加以明确。将所定标准实际应用在西安地铁渭河车辆段接触网的建设中,顺利通过了接触网的冷滑、热滑试验及实际运行的考验。同时,将所定部分标准与国铁普速接触网线岔检调标准进行对比,以供有关接触网生产和技术人员参考。     

轿车车身静态刚度计算及静态竖直弯曲刚度优化分析

采用UG软件建立了某国产轿车白车身静态分析有限元模型，计算并验证了其主要工况下的静态扭转特性，并进行了轿车车身静态弯曲挠度关于板单元厚度的灵敏度计算分析。针对分析结果进行了具体加强刚度的优化设计。     

CAN局域网及J1939协议在货车和客车上的运用

叙述了CAN总线网络的特点及J1939协议的原理、内容及协议的应用。并设计最小节点实现应用J1939协议的CAN局域网的数据通信功能。     

一种加工汽车同步器齿套滑块槽的新方法

结合对汽车同步器齿套滑块槽数控加工机床的研究，提出了一种利用摆线逼近圆弧的高效加工方法。通过建立摆线的参数方程，分析其各个参数对摆线形状的影响以及摆线逼近滑块槽圆弧的逼近误差，提出了确定摆线参数的算法及相应的计算程序。应用该算法对一个给定参数的滑动齿套滑块槽圆弧加工逼近误差进行分析计算，其理论逼近误差达到了0．0002mm，进而证明了利用这种方法加工同步器齿套滑块槽的可行性。     

钢箱梁构件对沥青铺装层应变的影响

从钢箱梁构件角度出发．按平板、板和U肋、无横隔饭的箱梁及带横隔板的局部段箱梁，用有限元方法分忻了相同荷位的荷载在铺装层中产生的最大应变．通过对比了解钢箱梁各构件对铺装层应变的影响程度。     

Study on dynamic characteristics of vehicle gearbox under multi-boundary conditions

With the development of vehicle gearbox to high-power-density and high-speed, how to predict and optimize the dynamic characteristics of vehicle gearbox becomes increasingly prominent. Aiming at the vehicle gearbox, this paper comprehensively and deeply studies the dynamic characteristics under the multi-boundary conditions. The generation mechanism of the multi-source excitations triggering the gearbox vibration is analyzed firstly. The vibration transfer path of the gearbox is explored. Secondly, the engine excitation, the gear meshing excitation and the bearing support load are numerically calculated. According to the finite element method, a fluid-solid coupling finite element model of the gearbox body is established to predict the gearbox dynamic responses based on the Galerkin method and the Hamiltonian variational principle. Finally, the effects of the excitation condition, oil height and reinforcement forms on the vibration responses of the gearbox body are thoroughly studied by simulation. The analysis indicates that it not only helps to modify and improve the method of forecasting the gearbox dynamic response, and also provides the theoretical and technical guidance for the gearbox design and optimization.     

Target priority determination methods by interval-valued intuitionistic fuzzy sets with unknown attribute weights

The paper aims at the problem of multi-targets threat degree being hard to be evaluated accurately in complex air defense battlefield environments. Combined with multi-sensors information fusion and interval-valued intuitionistic fuzzy sets (IVIFS) theories, the target priority determination is studied. The score and accuracy functions of IVIFS are improved with thinking about the hesitating information in order to increase the rationality. Then, the influence factors of target priority and the nonlinear relationship between the influence factors and target priority are analyzed. Next, the algorithms for calculating the factor weights and sensor weights are given. Based on the theory of IVIFS and technique for order preference by similarity to an ideal solution (TOPSIS), two methods of target priority determination based on the IVIFS and TOPSIS are proposed. At last, an application example verifies the effectiveness and flexibility of the proposed algorithms.     

Exploring the impact of walk–bike infrastructure,safety perception,and built-environment on active transportation mode choice: a random parameter model using New York City commuter data

This study estimates a random parameter (mixed) logit model for active transportation (walk and bicycle) choices for work trips in the New York City (using 2010–2011 Regional Household Travel Survey Data). We explored the effects of traffic safety, walk–bike network facilities, and land use attributes on walk and bicycle mode choice decision in the New York City for home-to-work commute. Applying the flexible econometric structure of random parameter models, we capture the heterogeneity in the decision making process and simulate scenarios considering improvement in walk–bike infrastructure such as sidewalk width and length of bike lane. Our results indicate that increasing sidewalk width, total length of bike lane, and proportion of protected bike lane will increase the likelihood of more people taking active transportation mode This suggests that the local authorities and planning agencies to invest more on building and maintaining the infrastructure for pedestrians. Further, improvement in traffic safety by reducing traffic crashes involving pedestrians and bicyclists, will increase the likelihood of taking active transportation modes. Our results also show positive correlation between number of non-motorized trips by the other family members and the likelihood to choose active transportation mode. The model would be an essential tool to estimate the impact of improving traffic safety and walk–bike infrastructure which will assist in investment decision making.     

上海轨道交通8号线耀华路站建筑装修设计

结合上海轨道交通7、8号线耀华路站建筑设计，分析论述了其换乘方式、建筑空间布置、文化定位、中国传统文化元素在车站建筑装修设计中的运用。