广州市两条道路中央绿化带的植物配置与景观特点

本文通过对广州市东风路、芳村大道两条道路中央绿化带植物种类及其景观特点的调查和分析,归纳总结了该类型道路中央绿化带的植物应用特色和施工养护要点,为广州市及其邻近地区的道路中央分车带绿化提供了参考。     

带传动中心距计算的研究

研究因同步带传动的出现和应用而对带传动中心距计算提出的新要求、新问题。对于ＩＳＯ推荐的精确计算式，导出了已很接近精确解的迭代初值的估算式，籍此明显地提高了迭代计算的效率。对于目前流行的常用式，经过改造，得到了它新的表达式。藉此解决了迄今ＩＳＯ精确式和常用式在形式上不统一的问题，并且给出了概括它们的统一的普遍式。     

桂粤交接地区及胶东花岗岩破碎带蚀变岩型金矿基本特征及找矿标志

本文以桂粤交界地区和胶东地区花岗岩破碎带蚀变岩型金矿为例,简述了该类型金矿的地质特征、成矿条件和成矿作用,总结了该类型金矿的找矿标志.     

Mechanical Properties and Failure Behavior of Cord/Rubber Composites

The mechanical properties and failure behavior of single tire belts with different cord angles were investigated. The cords consisted of two pairs of twisted steel wires. Geometric moiré and the grid method were used to measure small and large deformations, respectively. The stress–strain curves of all samples tested display three typical deformation stages, initial nonlinear deformation, followed by an intermediate stage of approximately linear deformation and a final stage of approximately linear deformation with increased modulus. The transition strain from the first to the second stage increases linearly with cord angle and the ultimate strength is found to follow the Tsai–Hill failure criterion. Failure mechanisms varied with cord angle. They are classified into four modes including failure within the cord, shear failure at the interface between cord and rubber, a combination of the above two modes and cord breakage. In-plane shear properties were obtained using both the Arcan pure shear and the 22° off-axis tests. They were found to be in good agreement. A nonlinear micromechanics model was proposed to predict the properties of single belts with different cord orientations by taking into consideration both the material and geometric nonlinearities.     

加蓬含盐盆地及邻区油气勘探现状和前景

简要分析了加蓬含盐盆地及邻区构造发育史,阐述了盆地结构特征以及含油气系统,重点介绍了加蓬含盐盆地油气勘探现状以及主要油气田——拉比—昆加油田和安圭莱海上油田,指出加蓬含盐盆地及邻区存在九大油气勘探远景带,具有比较大的油气勘探潜力。     

关于周边缝止水结构设计的探讨

周边缝是面板坝十分关键的部位，受坝体变形及水压力的作用，将产生张开、沉降和错动三向位移．对高坝，因水头高，位移植更大，其止水的性能将直接影响坝体的运行．国内外已建工程大多采用表面塑性止水、中部PVC、底部铜片三道止水，近年来又在顶部铺填粉煤灰或粉细砂，以期在底部反滤的作用下，缝自动淤堵，起到辅助防渗的作用．但常这不到预期的效果，亦很难适应大变位的条件，对其逐步加以改进将是十分必要的．本文以几个工程实例及试验研究成果为例，对止水结构的型式进行了讨论．     

SBC120防水卷材在厨卫间防水工程中的应用技术

西安某住宅楼为6层砖混结构．建筑面积7800m^2。该工程厨房、卫生间防水层原设计为涂料类防水材料．后改为卷材类防水材料,经论证,采用SBC120聚乙烯丙纶防水卷材铺贴,聚氨酯防水涂膜收口、封边、涂刷管根等部位（处理宽度10cm,刮涂两遍）。该工程入住一年未发现一处渗漏水,效果较好,解决了厨卫防水的问题。     

粘弹性传动带的分岔特性和混沌振动分析

研究了粘弹性传动带横向振动的分岔特性和混沌动力学行为．将传动带视为沿轴向运动的抗弯刚度较 小的粘弹性梁模型,同时考虑变形的几何非线性和材料的非线性因素,运用弹性力学方法建立了其横向振动 的偏微分方程,利用 Galerkin 方法得到了时空坐标解耦的二阶非线性动力学方程,重点探讨了带速波动对系统 动态特性的影响．采用数值方法对系统的运动响应进行仿真,分岔图和 Poincaré图表明：随着平均带速和波动 幅值的变化,系统出现周期振动和混沌振动,倍周期分岔是产生混沌振动的途径．