基于MAS协同框架的谈判支持系统   总被引：3，自引：0，他引：3  

牛晓太  孟波  杨鏖丞 《武汉大学学报(信息科学版)》2004,29(12):1119-1122

提出了用多Agent系统 (multi agentsystem ,MAS)协同工作模型来克服已有谈判支持的不足 ,研究了MAS系统的组织结构和交互机制 ;给出了基于MAS协同框架系统体系结构和工作模式 ,并介绍了系统的开发环境和实验结果。  相似文献   

结合高斯马尔可夫随机场纹理模型与支撑向量机在高分辨率遥感图像上提取道路网   总被引：13，自引：1，他引：13  

汪闽  骆剑承  周成虎  明冬萍  陈秋晓  沈占峰 《遥感学报》2005,9(3):271-276

在高分辨率遥感图像上,道路网的同物异谱现象更为突出,因此其提取难度更大。提出了一种马尔可夫随机场纹理模型与支撑向量机分类相结合的道路网提取方法。其基本过程是:利用高斯马尔科夫随机场模型6个归一化特征值进行支撑向量机的分类得到道路斑块,利用形态学算子对其进行初步连接并提取轴线,然后通过斑块轴线的启发式连接得到最终道路网。试验证明方法是有效的。  相似文献   

Influence of earthquake spatial variability on differential soil displacements and SDF system response     

Camillo Nuti  Ivo Vanzi 《地震工程与结构动力学》2005,34(11):1353-1374

The aim of this study is to develop design criteria, which account for the effects of earthquakes spatial variability. The two simplest forms of this problem are dealt with: differential ground displacements and differential structural displacements, for points and structures separated in space. The structures considered are linear elastic single degree of freedom oscillators. These problems may seem trivial, but some of the codes considered appear improvable on this aspect. First, the mathematical model is set up using basic random vibration theory and the code provisions critically examined. Then, the sensitivity of the ground and structural differential response is assessed. The differential displacements can be mathematically expressed in a straightforward fashion, both for the ground and the structures. These expressions are simple enough to be used as design rules. Comparison with the European and Italian Civil Protection codes shows that these can be improved on this aspect; and, for this reason, the Italian draft code for bridges has been mainly drafted following the results of this study. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   

我国主要白云母的矿物学特征研究   总被引：3，自引：1，他引：3  

宋功保  彭同江  刘福生  牟江  万朴 《矿物学报》2005,25(2):123-130

利用X射线荧光光谱分析（XRF）、常规化学分析、X射线光电子能谱分析（XPS）和粉晶X射线衍射分析（XRD）等手段对我国主要白云母进行了系统的矿物学研究，并与印度白云母进行了详细的对比分析，探讨了我国白云母与印度白云母在表丽化学组成和化学态、体栩化学成分、晶体结构方面的差异。研究发现：印度白云母表面K更多地表现为缺失留下空位，表面O严重缺失、不足，四面体层中Si有更多的暴露，表面化学键的不饱和程度高于我国白云母，表现出更高的表面活性。我国主要白云母产地的白云母为2M；型白云母，晶胞参数a、b值随结构中铁和镁离子含遗的增加而增大。  相似文献   

支持向量机在砂土液化预测中的应用研究   总被引：4，自引：0，他引：4  

陈荣淋  林建华  黄群贤 《中国地质灾害与防治学报》2005,16(2):15-18,23

介绍了人工智能领域最新的基于结构风险最小化原理的数据挖掘算法——支持向量机算法。根据支持向量机线性分类和可以具有不同核函数的非线性分类两种算法，建立了砂土液化预测模型，并且运用Matlab语言编写了程序。通过试算和分析比较得到了最佳模型，最佳模型的预测结果与实际液化情况基本上一致。认为支持向量机算法无论在学习或者预测精度方面都有很大的优越性，而基于支持向量机理论建立的砂土液化预测模型是可行的，且可以较为准确地实现砂土液化的预测。  相似文献   

郑州市水资源管理决策支持系统的设计与构成     

宫辉力 《吉林大学学报(地球科学版)》1997,(4)

以郑州市水资源－环境管理决策支持系统为例，详细论述了以地理信息系统为核心的水资源－环境管理决策支持系统的主要特点、设计原则和系统构成等关键问题。  相似文献   

青藏高原深部结构与构造地球物理研究的回顾和展望   总被引：8，自引：0，他引：8       下载免费PDF全文

滕吉文  熊绍柏  张中杰 《地球物理学报》1997,40(Z1):121-139

基于我国多年在青藏高原地区的深部地球物理探测研究及其所揭示的岩石层结构、构造和地球物理场特征，讨论了高原地壳短缩、增厚与隆升的深层过程和动力机制，提出了对青藏高原深化研究必须重视的几个问题．  相似文献   

TEM and XRD determination of crystallite size and lattice strain as a function of illite crystallinity in pelitic rocks   总被引：2，自引：0，他引：2  

W.-T. JIANG  D. R. PEACOR  P. ÁRKAI  M. TÓTH  & J. W. KIM 《Journal of Metamorphic Geology》1997,15(2):267-281

Average crystallite size and mean-square strain of illite in rock specimens and clay separates were measured independently in TEM images and by single-line Fourier (Voigt method) profile analysis of the c. 1 nm peak of XRD patterns for a prograde sequence of pelitic rocks (illite crystallinity indices=0.17–0.58°Δ2θ) from the Gaspé Peninsula, Quebec. The TEM-determined crystallite sizes in clay separates approximate those determined by Fourier profile analyses and those calculated from illite crystallinity indices by the Scherrer equation, with the exception of the diagenetic sample. The crystallite sizes and mean-square strains of illite in rock samples exhibit a trend similar to that determined by profile analyses, but the average crystallite sizes are up to five times larger than those measured for clay separates. TEM images show that all rock samples have a wide range of crystallite sizes, and the proportions of larger crystallites increase with metamorphic grade. The diagenetic illite is defect-rich, fine-grained (mean thickness by volume=c. 70 nm), 1M_d material. Anchizonal illite tends to occur as separate aggregates of small 1M_d and larger 2M₁ crystals (c. 200 nm), comprising arrays of subparallel coalescing packets. The epizone sample has thick (c. 400 nm), defect-free crystals of muscovite occurring in stacks of parallel layers, or subhedral crystals intergrown with large-angle boundaries. Cleaved crystals that are free of intracrystalline layer terminations are dominant in clay separates of all samples, having ranges of smaller sizes with volume-average thicknesses of c. 43, 43, and 81 nm (c. 14, 28, 67 nm by the Voigt method), respectively, for the three zones. The results suggest that illite crystallinity indices do not provide a direct measure of a single microstructural state of illite in rocks, although they yield consistent limits for average crystallite sizes for the anchizone (23 & 48 nm here). Therefore, they serve as a general parameter of the degree of recrystallization on a relative basis, in part because the contributions of all peak-broadening variables (mixed layering, size and strain) decrease regularly with prograde regional metamorphism of pelites. The microstructural changes caused by rock disaggregation are probably a function of those variables as well. The data collectively demonstrate a trend from metastable, defect-rich, small crystals towards a stable assemblage of larger, defect-free crystals, through dissolution of strained crystals and neocrystallization, consistent with the Ostwald step rule.  相似文献   

基于GIS的洪水灾害评估智能决策支持系统设计   总被引：3，自引：0，他引：3  

魏一鸣  周成虎 《地域研究与开发》1997,16(3):8-11,16

针对洪水灾害评估的特点，将地理信息系统（ＧＩＳ）技术与智能决策支持系统结合起来，设计了用于洪水灾害评估的智能决策支持系统，阐述了其设计原理，讨论和分析于基于ＧＩＳ的洪水灾害评估智能决策支持系统的组成模式，给出了其总体设计框架。  相似文献   

省级农村经济决策支持系统   总被引：1，自引：0，他引：1  

朱光前  韩天宝  姚兴涛 《地域研究与开发》1997,(4)

省级农村经济决策支持系统通过对大量的农村经济信息筛选、分析，最后制订出方案，实现辅助决策者进行科学决策的目标。即一方面为政府部门宏观指导农业和农村经济的发展提供决策支持；另一方面为农户的微观农业生产、家庭经营活动提供咨询服务。实现宏观计划控制与微观市场调节有机的结合，使分散无序的农户生产经营活动纳入有序的商品经济轨道，促进农村经济持续、快速、健康的发展  相似文献