岩体地震破坏后弹性波波动力学参数特征研究──以黄河大柳树地区岩体为例

地震是一种强自然灾害，对工程岩体的破坏实质是对地质体再改造的过程，它不仅改变了岩体原来的工程特性，同时也改变了岩体的赋存条件与环境。本文重点研究了中卫──同心活动断裂带内的黄河大柳树地区岩体地震破坏后的低波速，强衰减，低频率的特征，并研究其空间上的分布规律。按其工程地质分类标准应属碎裂结构和散体结构，即Ⅳ、Ⅴ类岩体。为进一步突出其波动力学特征，相应地与同岩性、同峡谷的小观音地区岩体，同岩性的李家峡坝基岩体做了比较。     

离心压气机叶轮与扩压器的流动分析

本文用数值计算方法分析了离心式压气机叶轮与扩压器内部的复杂全三维粘性流场。利用高速大内存计算机，较细致地揭示了离心压气机式叶轮与扩压器的内部流动，并做了相应的对比实验，测试结果定性地证实了数值计算的结论。     

快速计算任意振动体辐射声场的边界单元法

在运用边界单元法离散Ｈｅｌｍｈｏｌｔｚ积分方程的基础上，采用远场近似，提出了一种快速求解任意振动物体辐射声场的数值计算方法。并用该法对实例进行了计算和分析。     

滚刀齿形铲磨原理的研究及其应用

通过论证阿基米德螺旋面不可径向铲磨，引出“螺纹铲削面和圆柱性螺旋面都 是不可径向铲磨曲面” 的重要概念，从而阐明了滚刀齿形铲磨时其齿侧面必然发生 畸变的根本原因，指出了滚刀齿形铲磨原理的本质。 应用铲磨原理，文中提出一种计算铲磨砂轮廓形的新方法；提出一种能使齿轮 滚刀齿侧面１／２齿长上齿形都保持ＡＡ级精度的变Ｋ值铲磨新工艺；此外，还提出一 种金刚石铲磨砂轮修形的共轭拟合新方法。     

聚酯型聚氨酯化学组成的研究

本文报导了聚酯型聚氨酯水介和分离方法,经红外光谱(IR)、核磁共振氢谱和碳谱(H—NMR和~(13)C—NMR)鉴定,未知样品(系化工部二局提供进口PU型粘结剂)水介产物的化学组成是4,4′—二氨基二苯基甲烷、1.4—丁二醇和已二酸。     

Regularities of formation and lattice distortion of perovskite-type compounds

Based on 489 known perovskite-type complex oxides and a number of other type complex oxides, the pattern recognition-atomic parameter method is adopted to find regularities of the formation and the lattice distortion of the perovskite structure. It has been found that the restriction on Goldschmidt's t factor constitutes only a necessary but not a sufficient condition to form perovskite-type compounds. A more effective mathematical model, which can precisely sum up the regularities of the formation, the lattice distortion,and the cell constants of known perovskite-type compounds and reliably make corresponding predictions on unknown compounds, can be set up by integrating multiple atomic parameters such as ionic radii, ionic valency, and Basanov's electronegativity of constituent elements. Based on it, an intelligent database has been implemented. Its prediction accuracy is tested by eight newly discovered perovskite-type compounds such as Eu(Mn0.5 Ni0.5)O3, etc. (they are not included in the database during the test). The prediction resuits are in agreement with experimental facts.     

Vegetation reconstruction of Bronze Age by using microscopic structure of charcoals

The microscopic structure of charcoals was determined in two sites of Bronze Age, Chifeng area by using the scanning electronic microscope. The results showed that these charcoals are all timbers of Mongolian oak (Quercus mongolica). It has powerful climatic indicative significance. Based on the assemblage of pollen composition, their eco-climatic index and character of community, the vegetation reconstruction of Bronze Age was obtained. The reconstruction showed that the zonal vegetation was Mongolian oak forest and Chinese pine forest in the loess hills in the Chifeng area, which suggested that the climatic condition was warmer and wetter at that time than present time.     

Investigation on Relationship between Cost and Software Reliability

Based on the fact that the software development cost is an important factor to control the whole project, we discuss the relationship between the software development cost and software reliability according to the empirical data collected from the development process. By evolutionary modeling we get an empirical model of the relationship between cost and software reliability, and validate the estimate results with the empirical data.     

High-quality hydrocarbon source rock in the Paleogene sequence of the Ping Chau Formation, Hong Kong

Although petroleum exploration is being conducted in the Hong Kong region, high-quality hydrocarbon source rocks have never been found in this area. The Ping Chau Formation is only Mesozoic-Cenozoic sedimentary rock exposed in Hong Kong and its surrounding areas. The hydrocarbon source rock of the Ping Chau Formation is very rich in organic matters, which has an average total organic carbon (TOC) of 1.9% and chloroform bitumen ““A““ range from 0.14% to 0.24%. The total hydrocarbon content varies from 880 to 1800 ppm and the transformation ratio is specific from 5 to 9. The index of pyrolytic hydrogen is up to about 600 mgHC/gTOC. These data demonstrate the characteristics of the high-quality hydrocarbon source rock. The lamalginite is the major maceral of the source rock of the Ping Chau Formation, and geochemical characteristics also suggest that the organic materials of the source rock are of type I and type Ⅱ1, with abundant gammacerane, γ, β-caro-tane and C24 tetracyclic terpane, which indicate that it was formed in the salt water and brackish water sedimentary environment, and the source rock has evolved into a mature phase. The organic inclusions are found within calcite veins in cracks of the source rock, indicating that hydrocarbon has been generated and a secondary migration has happened. The source rock in the Ping Chau Formation is about 200-300 m thick, thus having considerable hydrocarbon potential. The discovery of the high quality hydrocarbon source rock in the Ping Chau Formation will certainly provide insight on hydrocarbon resource exploration in the South China Sea area.     

P2P软件中UPnP功能的实现

主要研究UPnP在P2P软件中的应用及UPnP功能实现的原理和步骤.因为现在互联网有一部分机器是工作在内网,而UPnP应用于P2P软件中可以将软件性能提高30%左右,利用UPnP实现端口映射对P2P软件性能提高有大?篌帮助.