桩侧后压浆技术成功处理软土的工程实践

通过一个成功的钻孔后压浆桩工程实例,介绍了钻孔后压浆桩的优点、承载力计算方法和施工措施.桩基的静动载检测结果表明,施工中通过合理布置压浆管、控制压浆顺序和压浆量可使软弱土层得到较好的处理效果.本工程的成功经验可为类似工程提供有价值的参考.     

华北近十年来水平运动动态与地震活动危险区的讨论

根据华北地区1999年和2001年两期高精度GPS观测结果，通过与1992，1995，1996年和1999年这几期资料的比较，发现近两年的运动与前有所不同，主要表现为：（1）阴山单元和鄂尔多斯单元之间显示为压性运动的性质，但比较微弱，它们之间的边界带上似乎有左旋走滑运动，但从整体上看并不显著。（2）晋冀鲁单元和燕山单元的整体活动性不如以前，各单元内部存在着较明显的差异运动，并山单元和晋冀鲁单元的北部存在着比较显著的东西向挤压，北京地区则表现为南北向挤压。（3）晋冀鲁单元南部与胶辽鲁苏单元的南部的趋势活动呈张性，优势运动方向为东南，这样的结果可能表明，华北目前存在着应力扰动行为，大同与天津之间的区域是受其影响最大的地区，该区有可能成为未来几年中强地震活动的一个主体地区。     

桥梁隔震体系振动台试验研究(III)——测试结果分析

根据前文所述的测试结果 ,本文主要分析了隔震构造、橡胶支座水平刚度、地震输入频谱特性、地震烈度、输入方向、桥墩高度、桥墩嵌固程度等因素对隔震效果的影响 ,揭示了隔震体系耗散地震能量输入的机理 ,所得出的结论对工程实践具有指导意义。     

桥梁隔震体系振动台试验研究(IV)——隔震桥梁的设计方法探讨

在前文模型试验的基础上 ,本文总结归纳了隔震桥梁的设计方法与设计流程 ,着重论述探讨了隔震桥梁的概念设计与细部构造设计应注意的问题     

PRELIMINARY NUMERICAL STUDY OF TOPOGRAPHIC EFFECTS OF THE TIBETAN PLATEAU ON SURFACE DIRECT RADIATION*

To improve the simulating ability of a model,this paper presents a scheme of calculating direct radiation at land surface with topography in the model.A numerical study is conducted for the topographic effects of the Tibetan Plateau on the direct radiation using NCEP terrain data.Results show that,after taking account into the topographic radiation effect,the regional average of the radiation over the Plateau obviously increases in the local early morning and late afternoon,but changes less around noon.The effect is stronger in winter than that in summer.And heterogeneous topography has also affected the distribution of the radiation in this area.A simple numerical experiment shows that considering the effect will lead ground temperature to increase on the slope having more sunshine,and vice versa.     

皮肤图像分析系统对祛斑类化妆品功效评价的研究

目的是探索如何获得不同色素性皮肤病的清晰图像，研制出操作简单、自动化与精度高的皮肤图像分析系统。方法：应用多光谱皮肤显微偏振光与数字图像处理技术，测量目标皮损形状、面积、灰度、积分光密度及色素颜色参数的变化等。结果：用祛斑类化妆品和药物治疗136例黄褐斑、经该系统测量分析后各治疗组相关参数随时间的推移呈下降趋势，而药物组与对照组相比各参数值明显下降、与各组相比均有显著差异（P＜0．05），并提出客观的疗效评定单位“ID”值。结论：该系统是一种潜力较大的皮肤表面色素定量工具，客观性和重复性好，灵敏度高，不对观察对象造成损伤，在临床获得满意效果。     

基于Exchange Server 5.0前兆网络邮件系统的建立

各省地震局 95 - 0 1- 0 2地震信息网络项目采用的邮件系统是基于 IRIX 6 .5操作系统的Netscape Mail Server2 .0 ,由于其应用与管理有局限性 ,笔者进行了基于 NT系统的 ExchangeServer5 .0邮件系统的应用研究 ,详细论述了基于 Exchange Server5 .0的黑龙江省地震前兆信息网络邮件系统的安装及配置过程 ,得出该网络邮件系统有管理方便、功能强大的结论     

珠江三角洲地区一体化交通运输网络发展构想

从区域经济一体化角度分析了珠江三角洲经济区交通运输的现状、问题和发展趋势，提出了建设一体化交通运输网络的基本思路和总体构想。认为珠三角交通运输设施虽然种类齐全且发展迅速，但还存在数量、质量、结构、布局等方面与区域经济一体化和未来发展趋势不相适应的问题；为了促进区域经济一体化，交通运输应从被动适应变为主动发展并引导城镇体系和生产力布局，从注重设施数量变为强调设施质量并向高速高效型发展；应该分4个层次建设3个枢纽和3大组团并与大运量快速干线相连接，构建区域一体化的交通运输网络。     

我国低山丘陵区水土流失生态环境背景分析

我国是一个以山地为主的国家，山地多为大江大河的源头，而低山丘陵为这些大江大河支流的发源地，这些区域的水土流失必然会带来环境问题。本文以TM影象为数据源，以GIS为技术支撑，从DEM中获取低山丘陵层，以此为MASK层，提取水土流失及相应的生态环境背景各层，包括土地利用、坡度、年降水、积温、植被等生态背景层，这些背景层是多年数据的平均，然后把水土流失层与环境背景各层分别叠加，分析不同环境背景下水土流失状况，从而为治理水土流失提出科学依据。     

A study on the early-warning technique concerning debris flow disasters

According to the principle of the eruption of debris flows, the new torrent classification techniques are brought forward. The torrent there can be divided into 4 types such as the debris flow torrent with high destructive strength, the debris flow torrent, high sand-carrying capacity flush flood torrent and common flush flood by the techniques. In this paper, the classification indices system and the quantitative rating methods are presented. Based on torrent classification, debris flow torrent hazard zone mapping techniques by which the debris flow disaster early-warning object can be ascertained accurately are identified. The key techniques of building the debris flow disaster neural network (NN)real time forecasting model are given detailed explanations in this paper, including the determination of neural node at the input layer, the output layer and the implicit layer, the construction of knowledge source and the initial weight value and so on. With this technique, the debris flow disaster real-time forecasting neural network model is built according to the rainfall features of the historical debris flow disasters, which includes multiple rain factors such as rainfall of the disaster day, the rainfall of 15 days before the disaster day, the maximal rate of rainfall in one hour and ten minutes. It can forecast the probability, critical rainfall of eruption of the debris flows, through the real-time rainfall monitoring or weather forecasting. Based on the torrent classification and hazard zone mapping, combined with rainfall monitoring in the rainy season and real-time forecasting models, the debris flow disaster early-warning system is built. In this system, the GIS technique, the advanced international software and hardware are applied, which makes the system′s performance steady with good expansibility. The system is a visual information system that serves management and decision-making, which can facilitate timely inspect of the variation of the torrent type and hazardous zone, the torrent management, the early-warning of disasters and the disaster reduction and prevention.