基于ArcEngine的县域地质灾害数据采集与分析系统

 以野外调查及灾害特征分析为基础,综合GIS技术、数据库技术与多源数据整合技术应用于县域地质灾害数据采集与分析,基本解决区域地质灾害调查信息化的瓶颈问题。将基础地理数据、灾害点特征数据、相关多媒体数据等异构数据源进行标准化处理,规定空间数据和灾害特征数据连接的各种关系,建立了基于SQL Server的ArcSDE Geodatabase地质灾害专题数据库。以VS.NET(C#)和ArcEngine作为可视化开发工具与GIS开发平台,实现了县域地质灾害数据采集与分析系统相关功能模块及软件的设计与编制。此系统包括灾害信息的录入编辑、查询统计、分析评价、制图输出等功能,为野外灾害数据快速采集与科学管理提供了基础计算机平台。     

3S技术在地质灾害监测中的应用

介绍了遥感技术(RS)、地理信息系统(GIS)、全球定位系统(GPS)的概念和优缺点,简要回顾了3S技术在地质灾害方面的应用情况和"3S"技术集成的相关情况,在此基础上拟建地质灾害监测系统。该系统包含以下主要子系统:数据获取与提取系统;空间数据管理与分析系统;动态监测系统;决策系统。在该系统中充分发挥了"3S"技术的优点,实现3S技术的优势互补。     

基于地理信息系统与斜坡单元的峨边县地质灾害易发性评价

斜坡单元依据山脊线和山谷线划分的单元,能够体现研究区的真实地质环境条件,作为评价单元在地质灾害易发性评价中具有重要意义。采用地理信息系统(geographic information system, GIS),运用水文分析工具提取峨边县斜坡单元,选取归一化植被指数、坡度、高程、地形起伏度、地层岩性、距水系的距离、距断层距离、距道路的距离8个因子,使用逻辑回归模型(logistic regression, LR),制得地质灾害易发性概率图,将其划分为非易发区、低易发区、中易发区、高易发区和极高易发区。结果表明：ROC(receiver operating characteristic curve)曲线的线下面积(area under curve, AUC)精度检验值为0.917,极高易发区和高易发区内地质灾害点数占总灾害点数的81.3%,说明对峨边县进行基于斜坡单元使用逻辑回归进行地质灾害的易发性评价具有可行性和较高精度。     

Joint Power Control Algorithm for CDMA TDD System

Current uplink power control algorithm of code division multiple access （CDMA） time division duplex（TDD） system contains signal-to-interference-ratio（SIR） and interference measurement, which is based on history information. However, the adjustment of transmission power of one user equipment（UE） will affect SIR of the others, because the power control is done independently of the power adjustment of other UE＇s. So the convergence speed of power control is not fast and the system performance degrades. In the proposed algorithm, all UE＇s assigned in same time slot adjust their transmission power based on current information, which takes into account the adjustments of transmission power of all UE＇s. The simulation results indicated that the proposed algorithm outperforms the old algorithm.     

贵阳市地质灾害危险性评价的GIS系统

系统在GIS具有的信息采集、分析和管理的强大功能基础上,建立空间信息数据库、评价指标信息库,采用权重法和模糊综合评判法,应用C Builder和VC 7.0程序语言进行二次开发,对研究区地质灾害危险性进行预测和评价。     

A Novel Risk Informatization Assessment System for In-Service Highway Slope Based on Network

Aiming at the information evaluation of traffic infrastructure in-service roadside slope risk assessment, the method of risk assessment for highway slope engineering is proposed by using the combination of quantitative and qualitative methods, and a new risk assessment method is proposed and improved. The system, in order to prevent the risks in slope engineering, serves the scientific decision-making of the maintenance, operation and management of the in-service road slopes. Based on the analysis of the special geological conditions, complex surrounding environment and construction schemes of existing highway slopes in China, this paper establishes an in-service slope evaluation model for in-service roads, and designs the scheme diagram of the in-service road slope evaluation system based on the networked Internet platform. Moreover, a set of in-service roadside slope risk assessment system software, the system component block diagram and the main design interface are given. This system can meet the needs of comprehensive evaluation of multi-factors in service road slopes.     

基于地学信息图谱的地质灾害成灾机制分析

 地质灾害的形成和演化受制于一定的区域背景条件,从而决定了区域地理环境对地质灾害的空间分布有着不可忽视的影响,地学信息图谱理论借助图形语言的形象思维和表达能力,可直观、简洁地表达地质灾害的形成条件和影响因素。本文基于地质灾害空间数据库,运用地学信息图谱理论和GIS 技术,将地质灾害空间属性及其与致灾因子在时间、空间分布的关系用图谱形式表示,分析研究区地质灾害在空间上的特征以及在时间上的变化过程。研究结果表明,研究区内地质灾害的形成主要受地形地貌、地层岩性、地质构造、降雨和人类工程活动等因素的影响和制约。其中,地形地貌是形成地质灾害的必要条件,地层岩性为地质灾害形态及变形破坏提供了物质基础,地质构造对地质灾害形成具有直接或间接的控制作用,降雨是地质灾害的主要触发因素,人类工程活动加剧了地质灾害的形成。     

Component-based software developing method for group companies management information system

Considering the special requirements of group enterprise information management software, a new method of massive software development was put forward basing on the component technology and facing the ＂assemblage＂. It generalizes five key parts of the method system including the overall strategy, the application project method basing on the operation ＂assemblage＂, the field project method basing on component, the development method facing the component on the basis of the visible component platform, and the software development process model basing on the component ＂assemblage＂. Besides, this paper describes the process and principle of this method application with an example of the construction of a Communications Investment Group enterprise＇s management information system. The method provides a new idea for breaking away from the predicament appeared in the construction of present enterprise informatization and exploring the way of software industrialization.     

A classifier based on rough set and relevance vector machine for disease diagnosis

A new intelligent method for disease diagnosis based on rough set theory (RST) and the relevance vector machine (RVM) for classification is presented as the rough relevance vector machine (RRVM). The RRVM mixes rough set’s strong rule extraction ability with the excellent classification ability of the relevance vector machine through preprocessing initial information, reducing data, and training the relevance vector machine. Compared with traditional intelligence methods such as neural network (NN), support vector machine (SVM), and relevance vector machine (RVM), this method manages to identify disease samples objectively and effectively with less transcendental information. Biography: LI Dingfang (1965–), male, Professor, Ph. D., research direction: computational learning theory, computing in science and engineering.     

基于GIS的信息量法模型在地质灾害危险性区划中的应用

讨论了将信息量模型与 GIS系统结合 ,进行地质灾害危险性区划的方法。其基本思路是充分利用 GIS强大的空间图形和属性数据管理功能 ,实现对地质环境数据的分层次管理。在此基础上 ,利用信息量模型开发了基于 GIS的空间分析地质灾害危险性区划模块。最后 ,以长江三峡库区为典型实例 ,讨论了 GIS与信息量法模型结合及其在地质灾害危险性区划中的应用。     

影像地质编录成果的三维可视化及查询分析方法

在研究及开发影像地质编录信息系统的基础上,基于数字地质编录成果,应用VC 和OpenGL技术,探讨了数字地质编录成果的三维可视化和查询分析方法,并以水电工程地质编录信息需求为例,给出了实现方法.结果表明,该方法对常见岩体工程建模及其地质编录成果三维可视化分析,不仅具有表面纹理映射灵活、场景渲染效果逼真的特点,而且具有同数据库连接方便、与模型对象交互功能强、支持三维空间分析等优点,并可实现岩体工程建模的自动化.     

西藏亚东县道路连通性及其受地质灾害的影响

开展西藏自治区亚东县道路连通性及其受地质灾害的影响研究,对改善当地路网连通性、提高山地灾害紧急疏散能力具有重要意义.利用遥感高清影像,采取目视解译结合实地考察的方式,获取亚东县道路和地质灾害数据;利用模糊层次法评估道路综合性能,构建道路连通性模型和地质灾害指数模型,探讨地质灾害对道路连通性的影响.结果表明：(1)亚东县地质灾害点有29个,主要集中分布在县域西南部区域,以崩塌为主.(2)路网具有典型树状特征,综合性能较好,但空间发育不均衡.(3)道路全局连通性呈现出“三核、两轴、一圈”的空间格局;局部连通性的空间差异较大,形成了4个局部高值区;中心连通性圈层结构明显,从中心向边缘的距离衰减特征明显.(4)亚东县地质灾害对居民点至各乡（镇）道路连通性的影响最大,对居民点至县政府道路连通性的影响次之,对居民点至最邻近的乡（镇）道路连通性的影响最小.     

Mining Interesting Knowledge from Web-Log

Web-tog contains a lot of information related with user activities on the Internet. How to mine user browsing interest patterns effectively is an important and chattengeable research topic. On the analysis of the present algorithm‘s advantages and disadvantages, we propose a new concept: support-interest. Its key insight is that visitor will backtrack if they do not find the information where they expect. And the point from where they backtrack is tbe expected location for the page. We present User Access Matrix and the corresponding algorithm for discovering such expected locations that can handle page caching by the browser. Since the URL-URL matrix is a sparse matrix which can be represented by List of 3 tuples, we can mine user preferred sub-paths from the computation of this matrix. Accordinglyo all the sub-paths are merged, and user preferred paths are formed. Experiments showed that it was accurate and scalable. It‘s suitable for website based application, such as to optimize website‘s topologicat structure or to design personalized scrvices.     

Google Earth在地质灾害信息管理中的应用

对以Google Earth为开发平台,利用其影像、地形数据和地标等功能,管理地质灾害信息的方法进行了研究。基于Google Earth平台上的地质灾害信息管理,支持影像数据更新和成果网络共享。该方法成功应用于惠州市地质灾害信息管理,具有较高的研究价值和广阔的应用前景。     

基于GISANN的宁德地质灾害风险评价系统研究

将GIS技术和神经网络集成应用于宁德地质灾害危险性评价中,发挥GIS强大的空间信息可视化管理分析功能及神经网络的非线性描述和分析功能,建立GISANN模型．旨在实现地质灾害危险性评价的可视化管理,为宁德国土资源开发、环境保护、地质灾害防治工程等提供科学决策依据,增强政府自然灾害应急救助能力,为和谐社会建设和可持续发展提供科学支撑．     

地理信息系统和数字化地形图

以地理信息系统的基本理论为基础，论述了数字化地形图在测绘，计算机辅助土建设计以及辅助决策管理中的特点，并就使数字化地形图满足城市建设管理和地理信息系统的发展作了有益的探索性研究。     

三维地理场景下基于地质特征的数字露头空间检索方法

数字露头技术已成功应用于地质研究,海量的地质露头模型与资料管理成为了技术难题。传统的信息管理方式,如文件夹管理、信息系统管理等,都无法直接获取露头的空间位置,也无法从空间位置直接检索到露头。针对这个问题,运用SuperMap灵活的空间检索功能,提出了一种在三维地理场景下基于地质特征的数字露头空间检索方法,将野外勘测获得的照片、扫描所建立的三维模型、文字信息记录、位置等多种类型的资料纳入到空间数据库中,结合数字高程模型和遥感影像搭建三维地理场景来模拟现实地形地貌,实现从空间定位、地层地质、构造地质、岩相古地理、含油气盆地、岩性等空间与属性综合的露头信息检索管理。并运用SuperMap iObjects.NET 10i和C#.NET技术,在三维地理场景下实现基于地质特征的数字露头空间检索方法,搭建数字露头空间检索引擎平台,且对比传统信息管理方式,综合评价其更占优。     

扩能改建铁路地质灾害特征与防治措施

针对辽宁省高台山-阜新-锦州铁路扩能改造工程沿线潜在的地质灾害问题,采用垂直断面法、自由膨胀率算法对扩能改造铁路通过区所引发和遭受的地面沉陷、膨胀土胀缩等地质灾害进行了专项量化评估与预测,划分地质灾害危险性分区,并结合辽宁西部地区地质灾害的特点提出灾害防治措施.为正确认识铁路通过区地质灾害类型及其特征,研究其防治措施,对优化线路走向、合理确定工程设置类型有着积极的作用.     

Integrated semantic similarity model based on ontology

To solve the problem of the inadequacy of semantic processing in the intelligent question answering system. an integrated semantic similarity model which calculates the semantic similarity using the geometric distance and informarion content is presented in this paper. With the help of interrelationship between concepts, the information content ofconcepts and the strength of the edges in the ontology network. we can calculate the semantic similarity between two concepts and provide information for the further calculation of the semantic similarity between user‘s question and answers in knowlegdge base. The results of the experiments on the prototype have shown that the semantic problem in natural language processing can also be solved with the help of the knowledge and the abundant semantic information in ontology. More than 90% accuracy with less than 50 ms average searching time in the intelligent question answering prototype system based on ontology has been reached. The result is vety satisfied.     

川藏公路海子山至竹巴笼段主要地质灾害评价

对川藏路海竹段沿线工程地质条件研究的基础上，对该段主要地质灾害进行了分析，并结合所做出的评价提出了切实可行的处治建议，对海竹段改建工程的设计与施工具有指导意义。