基于小波神经网络的多属性决策方法

在分析了多属性决策问题及现有方法之后,提出了用小波神经网络建立权重分配模型从而改进多属性决策的方法,使权重的确定较为客观准确,并具有自学习功能,还介绍了该方法在工业产品质量决策方案评价中的应用.     

一种Agent结构的形式化模型

从外表看,Ａｇｅｎｔ是具有信念、意向、期望等意识属性的统一整体。Ａｇｅｎｔ之间可相互通信或相互合作,而且,Ａｇｅｎｔ自身还可以有诸如计算,推理或其他人们所希望的具有一定的智能特征的行为。为了把Ａｇｅｎｔ行为和它所应具有的内部结构联合起来,本文提出一种Ａｇｅｎｔ 形式化描述模型,在此模型的帮助下,可以较好地把一些Ａｇｅｎｔ的简单行为解释为Ａｇｅｎｔ内部状态的演变过程。这对Ａｇｅｎｔ的建模与实现,加深     

利用数据库实现液压系统的有效管理

本文介绍一种利用AutoCAD环境下的VBA及内嵌的数据库引擎技术，在液压系统CAD图形中自动提取液压元件图块的属性，生成液压系统数据库的方法，以实现液压系统的数字化管理。     

有关巴黎城市空间价值的探讨

“城市空间本质上是一种产品。对人类需求满足的充分度决定了空间（产品）价值能否最大化发挥。文章从“人的需求”和“空间属性”入手，提出城市空间价值体系的内涵，辅以法国行程中观察到的“设计使空间价值最大化”的实例，期望对国内的空间设计提供可借鉴和参考的信息。     

Using new attribute construction to incorporate the expertise of human experts into a smuggling vessels classification system

Modifying the database originally designed for maritime transportation and harbourside sailing safety management in order to train the data classifier to detect smuggling and illegal immigrant vessels may lead to a lack of class-related attributes, and the accuracy rate of classification may be low. However, some valuable artificial classification rules already exist prior to the building of a data classifier, and it is worth attempting to incorporate them into the database and thus build a more accurate data classifier. With the limiting condition that no extra reference point of the terrain can be added into the system, this research selects the artificial smuggling detection rule “vessels sail fast towards shore” deduced by Coast Guard’s officers, sets the radar station as the reference point of the shore coordinates, and defines a new attribute, the absolute difference between the anti-course and target azimuth, to demonstrate the “vessels sail approximately towards radar station or sea” concept. Matching the original “speed” attribute, the newly-modified database includes the intrinsic meaning of “vessels sail fast towards radar station or sea”. The results show that the accuracy rate of the two data classifiers, the back-propagation neural network (BPN) and support vector machine (SVM), improved by 22% and 14%, respectively. It is significant that incorporation of the expertise of human experts by new attribute construction contributes to the effective learning of the data classifier.     

重庆市市政部件普查要点浅析

通过对重庆四区市政部件普查进行技术总结,提出了市政管理部件普查工程基本模式和流程,提出了市政管理信息系统建设的思路.     

The application of a new attribute selection technique to the forecasting of housing value using dependence modelling

This article introduces the J-score, a heuristic feature selection technique capable of selecting a useful subset of attributes from a dataset of potential inputs. The utility of the J-score is demonstrated through its application to a dataset containing historical information that may influence the house price index in the United Kingdom. After selecting a subset of features deemed appropriate by the J-score, a predictive model is trained using an artificial neural network. This model is then tested and the results compared with those from an alternative model, built using a subset of features suggested by the Gamma test, a non-linear analysis algorithm that is described. Other control subsets are also used for the assessment of the J-score model quality. The predictive accuracy of the J-score model relative to other models provides evidence that the J-score has good potential for further practical use in a variety of problems in the feature selection domain.     

一种高效的Deep Web内容获取技术

近几年,对Deep Web的研究和实践,尤其在商业领域已经有了一定实质性的成果.但在对网络数据库内容获取上仍处于起步阶段.就Deep Web数据库内容的获取展开研究,设计一种属性值图的方法,从图形角度对数据库内容遍历,最终获取Deep Web内容.通过实验验证,证明该方法能有效地获取的大量Deep Web内容,用户可通过搜索引擎更方便快捷地查找,大大提高了索引的覆盖率和效率.     

Integrated method of compromise-based ant colony algorithm and rough set theory and its application in toxicity mechanism classification

Attribute discretization and reduction are two key issues in rough set theory. However, almost all previous studies consider them as two separate steps, which can not capture an inherent relationship between them. In this paper, a bi-objective optimization problem is constructed for simultaneous attribute discretization and reduction. A novel compromise-based ant colony algorithm (CACA) for simultaneously solving attribute discretization and reduction is proposed, which adopts a distance metric to stepwise approach the ideal solution. To improve efficiency of the proposed method, both the cut information and attribute information are adopted to dynamically calculate heuristic information, and a local search strategy is also embedded. The grade of nature spearmint essence (NSE), wine and glass classification problems are used as three test datasets to demonstrate the validity of the proposed CACA. Furthermore, the proposed method is applied to two toxicity mechanism classification problems: the classification of three narcosis mechanisms of aquatic toxicity for 194 organic compounds and the classification of four action modes of 221 phenols. The obtained results illustrate that the proposed method has better prediction performance than linear discriminant analysis, radial basis function neural network and support vector machine.     

工程接地之“灰色区域”

目前国内有关接地的技术规范没有统一的做法，而国外也存在不按照IEC标准实施的情况。本文结合国内外相关规范、标准，例举了一些工程实例，分析阐述了工程接地中似是而非。似错非错的做法。