基于DS理论的不确定空间co-location模式挖掘

 提出一种基于DS理论的co-location挖掘方法.先将数据集按照空间对象分类,然后从分类后的子数据集中依次提取该空间对象的实例,与其他空间对象数据集中的各个实例进行配对,将找到的各实例关系记录到一个新的关系表中,作为使用DS理论求解的基础.从一个新的角度来研究co-location挖掘技术,在DS理论的基础上重新定义了参与度,基于新定义的参与度来求解co-location模式.     

一个基于同义词证据扩展的信念网络检索模型

归并不同证据资源扩展用于信息检索的信念网络是当前一个重要的研究方向。以同义词为证据扩展基本信念网络模型,得到一个扩展的信念网络检索模型。实验证明,扩展模型的检索性能优于基本模型。     

随机和认知混合不确定系统的全局灵敏度分析方法

为计算具有随机不确定性和认知不确定性的混合不确定系统灵敏度,提出一种基于证据理论和条件概率理论的全局灵敏度分析方法.用证据理论对认知不确定性变量进行表征,并提出两种基于证据理论的随机采样方法,包括一次随机抽样法和二次随机抽样法.运用条件概率理论,提出存在认知不确定性条件下混合不确定系统的Sobol'全局灵敏度指标,经过理论推导给出一阶灵敏度及总灵敏度的计算公式,并设置单循环的拟蒙特卡罗方法实现灵敏度的近似数值计算.开发了灵敏度分析程序,并给出了典型应用实例.实例表明,新方法的分析结果正确,计算工作量可控.     

Dark matter,the Equivalence Principle and modified gravity

Dark matter (DM) is an essential ingredient of the present Standard Cosmological Model, according to which only 5% of the mass/energy content of our universe is made of ordinary matter. In recent times, it has been argued that certain cases of gravitational lensing represent a new type of evidence for the existence of DM. In a recent paper, Peter Kosso attempts to substantiate that claim. His argument is that, although in such cases DM is only detected by its gravitational effects, gravitational lensing is a direct consequence of Einstein's Equivalence Principle (EEP) and therefore the complete gravitational theory is not needed in order to derive such lensing effects. In this paper I critically examine Kosso's argument: I confront the notion of empirical evidence involved in the discussion and argue that EEP does not have enough power by itself to sustain the claim that gravitational lensing in the Bullet Cluster constitutes evidence for the DM Hypothesis. As a consequence of this, it is necessary to examine the details of alternative theories of gravity to decide whether certain empirical situations are indeed evidence for the existence of DM. It may well be correct that gravitational lensing does constitute evidence for the DM Hypothesis—at present it is controversial whether the proposed modifications of gravitation all need DM to account for the phenomenon of gravitational lensing and if so, of which kind—but this will not be a direct consequence of EEP.     

基于粗糙集和证据理论的决策规则提取

提出一种基于粗糙集和证据理论的两阶段决策规则提取算法, 该算法首先利用粗糙集中属性缩减的思想, 找出每条规则中的重要条件属性集合, 然后再基于证据理论中证据结合的思想进一步去掉重要条件属性集中的冗余条件属性, 从而得到最终的决策规则. 所给算法简化了属性集的约简, 对高维数据也是可行的. 实验结果表明, 利用该算法能够挖掘出高质量的决策规则.     

On the empirical equivalence between special relativity and Lorentz׳s ether theory

In this paper I argue that the case of Einstein׳s special relativity vs. Hendrik Lorentz׳s ether theory can be decided in terms of empirical evidence, in spite of the predictive equivalence between the theories. In the historical and philosophical literature this case has been typically addressed focusing on non-empirical features (non-empirical virtues in special relativity and/or non-empirical flaws in the ether theory). I claim that non-empirical features are not enough to provide a fully objective and uniquely determined choice in instances of empirical equivalence. However, I argue that if we consider arguments proposed by Richard Boyd, and by Larry Laudan and Jarret Leplin, a choice based on non-entailed empirical evidence favoring Einstein׳s theory can be made.     

完善科学管理机制,提高房管执法工作效能

城市房屋违法建设是在一定历史时期内客观存在的社会现象,它涉及社会的方方面面,关系到千家万户的切身利益,利益关系复杂,是城市建设中群众关心的热点问题。如何打开城市房屋违法建设工作的突破口,笔者认为必须提高房管监察执法队伍素质,造就一支本领过硬的执法队伍。文章就如何走出房管监察执法工作面临的困境,开拓新的房管监察执法工作思路提出一些建议。     

Decision fusion recognition based on modified evidence rule

A modified evidence combination rule with a combination parameter λ is proposed to solve some problems in D-S theory by considering the correlation and complement among the evidences as well as the size and intersection of subsets in evidence. It can get reasonable results even the evidences are conflicting. Applying this rule to the real infrared/millimetre wave fusion system, a satisfactory result has been obtained.     

表面边界模型智能生成的研究

提出一种从拓扑信息智能地产生表面边界模型的算法,这种算法可自动地检测和消除病态表面,正确地产生形体.     

西部中心城市可持续发展的评价--以西宁市为例

运用可持续发展的有关理论，建立了城市可持续发展的评价指标体系，选择了评价方法及模型．应用主客观综合集成赋权法对西宁市1995—2002年的可持续发展状况进行了纵向评价，揭示了制约因素并提出了相关对策．认为发展经济(并注重经济增长的质量)以增强经济实力，为可持续发展打下坚实的经济基础，是西部中心城市可持续发展的首要任务．