Disaster Reduction Decision Support System Against Debris Flows and Landslides Along Highway in Mountainous Area

Highways in mountainous areas are easy to be damaged by such natural disasters as debris flows and landslides and disaster reduction decision support system (DRDSS) is one of the important means to mitigate these disasters. Guided by the theories and technologies of debris flow and landslide reduction and supported by geographical information system (GIS), remote sensing and database techniques, a DRDSS against debris flow and landslide along highways in mountainous areas has been established on the basis of such principles as pertinence, systematicness, effectiveness, easy to use, open and expandability. The system consists of database, disaster analysis models and decisions on reduction of debris flows and landslides, mainly functioning to zone disaster dangerous degree, analyze debris flow activity,simulate debris flow deposition and diffusion, analyze landslide stability, select optimal highway renovation scheme and plan disaster prevention and control ergineering. This system has been applied successfully to the debris flow and landslide treatment works along Palongzangbu Section of Sichuan-Tibet Highway.     

西藏近现代新闻传播事业考评

西藏近现代新闻传播事业(公元1907年《西藏白话报》～1951年《新闻简讯》、《草原新闻》创办)的研究向为学界所疏忽。本试图以历史的视野，从对报刊、广播两方面极为有限的献资料的梳理入手，确立西藏近现代新闻事业的基本框架，较为真实地认识和整体地把握西藏的新闻传播事业发展状况。     

China'''' s Fundamental Research in Energy Utilizations and Environment

The progress in the science of energy utilizations will act crucial effect on the developments of energy science and technology, which will then promote social and economical developments and fulfill requirements for the national strategic objectives. For the sake of sustainable development, a harmonious blend of energy utilizations and environment considerations will become one of the vital topics in the future research area of energy science. It is suggested that clean and high-efficiency utilization of traditional or fossil energy resources, fundamental investigations on the energy and environment theory, renewable energy utilizations, and the development of nuclear energy are selected as priority research areas during the period of the Tenth Five-year Plan of China, according to the development trend of the world energy science and the research background of Chinese energy science. It is expected to promote the interdisciplinary investigations in the science of energy u-tilizations and provide scien     

一种DSM模型下飞行障碍物尺度的研究

在一种数字表面模型(DSM)建模方法的基础上,对威胁飞行器低空飞行安全的独立障碍物的尺度与DSM纵横断面采样间距的关系进行了分析,给出了独立障碍物的定义、分类和确定独立障碍物的方法。通过对7.2km2一典型城市地域的仿真试验表明,DSM纵横断面间距在3～25m之间,威胁飞行器地形跟踪制导安全的孤立障碍物较少,同时装订并实时处理的DSM模型数据量也较小,并在纵横断面间距12.5m处达到两者最优。     

移动通信中多重建筑物的遮挡损耗

用Uniform Geometrical Theory of Diffraction（UTD)分析了等高度等间距的建筑物对移动通信中移动台接收信号的影响，给出了易于计算的UTD拟合表达式，计算表明，此时Hata模型、COST231模型的计算结果和UTD的计算结果是较为接近的，但要精确地比较各场点的传播损耗只能用UTD按照实际的不等高度，不等间距的建筑物分布来计算，结果表明，当移动台前一幢建筑物的直接路径被阻挡时，UTD方法能较确定的反映此时的传播损耗。     

智能集成作业系统的控制研究

研究了智能集成作业系统的组成及功能，阐述了智能集成作业系统的传感器配置及关键传感器工作原理、智能控制体系结构、控制系统硬件组成及软件结构等，分析了智能集成作业系统传感器和控制系统的关键技术与特点     

我国煤炭资源型城市环境问题研究

我国煤炭资源型城市数量众多,长期的掠夺式的煤炭开采造成了矿区严重的环境问题,成为城市经济转型的主要障碍,制约了这些煤炭城市经济与社会的可持续发展,寻求各种途径解决由于煤炭开发利用产生的环境污染问题,已经成为当务之急.本文在总结我国煤炭城市及煤炭矿区分布特点的基础上,探讨分析了我国煤炭资源型城市存在的环境问题,提出了解决煤炭矿区环境问题的对策和建议.     

Sr-Nd isotope geochemistry of eolian dust of the arid-semiarid areas in China： Implications for loess provenance and monsoon evolution

Strontium (Sr) is a divalent alkaline earth element. Its ionic radius (0.113 nm) is slightly larger than that of calcium (0.099 nm), and Sr thus substitutes isomor- phously for Ca in many minerals. Neodymium (Nd) is a rare earth element. Its chemical prop…     

中国西南地区岩溶水资源的特点及可持续利用对策

岩溶水资源是西南岩溶地区社会经济发展的一个最为重要的支撑点．西南岩溶地区降水丰富，岩溶水资源总量大，但由于强烈的岩溶作用和岩溶植被的破坏，西南岩溶地区成为我国严重缺水的地区之一，水资源问题成为制约该地区经济发展的关键因素．充分认识西南岩溶地区水资源的赋存特点和时空演变规律，认清目前岩溶水资源开发利用中存在的问题及原因，有利于今后西南岩溶地区水资源的合理开发和保护，对实现西南岩溶地区脱贫和社会经济的可持续发展具有重要意义．从地质背景和人类活动胁迫两方面分析了岩溶含水层的特点以及目前西南岩溶地区水资源开发利用中存在的突出问题，提出了西南岩溶区水资源的可持续利用的对策．     

从《清嘉录》看清中后期吴地的城市民俗

《清嘉录》是清朝嘉、道年间由苏州吴县顾禄撰写的地方岁时记，它从岁时这个侧面反映出当时江南日益成熟的城市民俗。从大体上讲，城市民俗由两大部分组成：一是完全由城市所独立形成的民俗；二是由由乡村民俗演变而成的城市民俗。在《清嘉录》中，前者主要表现在城市的商业、娱乐休闲和服务业、岁时礼俗等方面，后者则更多地渗透在市民的日常生活起居中。