小净距并行隧道围岩稳定的分析方法及应用

高等级公路、双线铁路、城市地铁及城市轻道一般情况下均为左、右双线。近年来，为满足规划、平面线型要求，或受地形、地物、水文、地质等条件限制，或对原交通设施进行加宽扩容，或为提高土地利用率，小净距并行隧道呈迅速增加态势。由于各种施工方法围岩受力差别很大，笔者仅探讨采用矿山法或新奥法施工的暗埋隧道。笔者介绍了其相应的围岩稳定分析方法以及在重庆市轨轨二号线设计中的应用。     

Phase change analysis of an underwater glider propelled by the ocean＇s thermal energy

The phase change characteristic of the power source of an underwater glider propelled by the ocean＇s thermal energy is the key factor in glider attitude control. A numerical model has been established based on the enthalpy method to analyze the phase change heat transfer process under convective boundary conditions. Phase change is not an isothermal process, but one that occurs at a range of temperature. The total melting time of the material is very sensitive to the surrounding temperature. When the temperature of the surroundings decreases 8 degrees, the total melting time increases 1.8 times. But variations in surrounding temperature have little effect on the initial temperature of phase change, and the slope of the temperature time history curve remains the same. However, the temperature at which phase change is completed decreases significantly. Our research shows that the phase change process is also affected by container size, boundary conditions, and the power source＇s cross sectional area. Materials stored in 3 cylindrical containers with a diameter of 38ram needed the shortest phase change time. Our conclusions should be helpful in effective design of underwater glider power systems.     

锚固三维网生态防护理论及其在边坡工程中的应用

从植被对边坡的力学效应、水文效应及生物生态效应等方面对生态护坡技术原理进行加固与水土保持的分析。提出基于无限坡模型的边坡生态防护计算模型，并依据活性土壤技术、排水保水保肥技术、边坡特征及植被景观要素进行生态护坡的分析设计。本文介绍三维网生态护坡技术在永湖渡槽边坡工程中的应用，并对三维网人工生态护坡施工工艺进行分析。     

基于Petri网的虚拟维修手部动素建模

针对虚拟维修仿真中手部动作仿真难度大、不容易控制的问题,提出基于Petri网手部维修动素模型,将虚拟维修手部动作根据维修操作封装为若干动素单元的组合,降低了仿真计算的难度,从而提高手部动作控制的精确性,以螺栓拆卸的手部动作建模过程为例进行验证。     

沥青混合料的疲劳试验研究

已有文献表明加载频率对于疲劳寿命的影响较大，对于沥青砼．其影响可能更显著。根据沥青混合料的室内低频疲劳试验，运用耗散能理论，得到沥青混合料的低频疲劳规律。     

建立广东省航道GPS-C级控制网的意义和初步构想

阐述了采用GPS建立全省航道C级控制网的意义和作用.提出了全省航道C级GPs控制网中框架网、C级网的布设方案和数据处理的初步构想.