Review of Remotely Sensed Imagery Classification Patterns Based on Object-oriented Image Analysis

With the wide use of high-resolution remotely sensed imagery, the object-oriented remotely sensed informa- tion classification pattern has been intensively studied. Starting with the definition of object-oriented remotely sensed information classification pattern and a literature review of related research progress, this paper sums up 4 developing phases of object-oriented classification pattern during the past 20 years. Then, we discuss the three aspects of method- ology in detail, namely remotely sensed imagery segmentation, feature analysis and feature selection, and classification rule generation, through comparing them with remotely sensed information classification method based on per-pixel. At last, this paper presents several points that need to be paid attention to in the future studies on object-oriented RS in- formation classification pattern: 1) developing robust and highly effective image segmentation algorithm for multi-spectral RS imagery; 2) improving the feature-set including edge, spatial-adjacent and temporal characteristics; 3) discussing the classification rule generation classifier based on the decision tree; 4) presenting evaluation methods for classification result by object-oriented classification pattern.

Finite Element Structural Analysis UsingObject-Oriented Techniques

This paper describes the object-oriented implementational method of finite element structural analysis, gives the basic concepts of the object-oriented method and objectoriented programming, develops a complete class hierarchy structure of object-oriented finite element structural analysis, and gives a part C+ + code description.

Reliability Modelling and Analysis of Satellite Propulsion System Based on Reliability Block Diagram and Extended Object-Oriented Petri Net

Modern satellite propulsion systems are generally designed to fulfill multiphase-missions.Traditional reliability modelling methods have problems of inadequate depict capacity considering complex systems such as satellite propulsion system.An extended object-oriented Petri net(EOOPN)method was proposed to facilitate the reliability modelling of satellite propulsion system in the paper.The proposed method was specified for modelling of phased mission system,and it could be implemented by generating combination of Petri net(PN)principles and object-oriented(OO)programming.The effectiveness of the proposed method was demonstrated through the reliability modelling of a satellite propulsion system with EOOPN.The major advantage of the proposed method is that the dimension of net model can be reduced significantly,and phased mission system at system,phase,or component levels can be respectively depicted.Furthermore,the state-space explosion problem is solved by the proposed EOOPN model efficiently.

Open-Access Framework for Efficient Object-Oriented Development of Video Analysis Software

The increasing use of digital video everyday in a multitude of electronic devices, including mobile phones, tablets and laptops, poses the need for quick development of cross-platform video software. However current approaches to this direction usually require a long learning curve, and their development lacks standardization. This results in software components that are difficult to reuse, and hard to maintain or extend. In order to overcome such issues, we propose a novel object-oriented framework for efficient development of software systems for video analysis. It consists of a set of four abstract components, suitable for the implementation of independent plug-in modules for video acquisition, preprocessing, analysis and output handling. The extensibility of each module can be facilitated by sub-modules specifying additional functionalities. This architecture enables quick responses to changes and re-configurability;thus conforming to the requirements of agile software development practices. Considering the need for platform independency, the proposed Java Video Analysis (JVA) framework is implemented in Java. It is publicly available through the web as open-access software, supported by a growing collection of implemented modules. Its efficiency is empirically validated for the development of a representative video analysis system.

叉车三维实体造型及CAD

在实体造型系统上建立了叉车的三维实体模型，并对部分零 部件进行了运动学、动力学仿真及有限元分析计算，得到叉车综合效能方面的有关评价资料 ，可作为对已有设计的检验，且为改进设计提供依据。

A Hybrid Set of Complexity Metrics for Large-Scale Object-Oriented Software Systems

Large-scale object-oriented（OO） software systems have recently been found to share global network characteristics such as small world and scale free,which go beyond the scope of traditional software measurement and assessment methodologies.To measure the complexity at various levels of granularity,namely graph,class（and object） and source code,we propose a hierarchical set of metrics in terms of coupling and cohesion-the most important characteristics of software,and analyze a sample of 12 open-source OO software systems to empirically validate the set.Experimental results of the correlations between cross-level metrics indicate that the graph measures of our set complement traditional software metrics well from the viewpoint of network thinking,and provide more effective information about fault-prone classes in practice.

An approach to improve the quality of object-oriented models from novice modelers through project practice

The defects in object-oriented models will result in poor quality of applications based on the models, and thus it is necessary to know which defects often occur in practice, to what extent they occur, why they occur, and how they can be prevented. To gain deeper insights into these problems, this paper discusses how to improve the quality of object- oriented models from novice modelers through project prac- tice. This paper summarizes a set of typical quality defect types from a large number of the defects, and confirms them through our project practice. Moreover, the paper analyzes the improvement of the quality of object-oriented models by quantifying the level of occurrence for the defect types in dif- ferent phases of the project practice, and presents preventive measures by analyzing the causes for the defects to occur in object-oriented models in the aspects of syntax, semantics, and pragmatics.

软件分析建模策略中的面向对象方法及相关讨论

首先介绍了面向对象的软件分析建模的重要性;并在分析比较目前流行的几种面向对象分析建模策略的基础上,着重介绍了在开发系统系列工具中采用的一种基于面向对象技术的分析建模策略;对分析建模过程中涉及的一些关键问题进行了探讨。

Development of Integrated Simulation System for Plastic Injection Molding

Numerical simulation of injection molding have had success in predicting the behavior of polymer melt in extremely complicated geometries. Most of the current numerical solutions are based on finite-element/finite-difference/boundary-element/volume-control methods and the surface model. This paper discusses the development of an integrated CAE system for injection molding in detail, and presents the mathematics for numerical simulation of filling, packing, cooling, stress and warpage in injection molding. The developed system named as HsCAE3D is introduced at the end.

MFV-Class： a multi-faceted visualization tool of object classes

Classes are key software components in an object-oriented software system. In many industrial OO software systems, there are some classes that have complicated structure and relationships. So in the processes of software maintenance, testing, software reengineering, software reuse and software restructure, it is a challenge for software engineers to understand these classes thoroughly. This paper proposes a class comprehension model based on constructivist learning theory, and implements a software visualization tool (MFV-Class) to help in the comprehension of a class. The tool provides multiple views of class to uncover manifold facets of class contents. It enables visualizing three object-oriented metrics of classes to help users focus on the understanding process. A case study was conducted to evaluate our approach and the toolkit.

Semiautomated OOA Map of Morphoclimatic Attributes from Sao Joao-MG River Basin, Brazil

This study proposes a survey of environmental information by applying techniques of modeling, image segmentation and OOA （object-oriented analysis） in the definition of landscape units based on morphoclimatic atributes. Landscape attributes such as climate and relief （morphoclimatic） were selected to start the characterization of the Silo Joio--MG river basin, located in southeastern region Brazil. The semiautomated mapping was produced from data extracted, respectively, of the DEM Aster and Topodata, and grid Worldclim. This database was processed and scaled to l：100,000 scale, generating a geomorphological classification, according to criteria of IPT （Instituto de Pesquisas Tecnologicas）, two climatic classifications, the one by the methodology of Koppen and the other one by methodology Thornthwaite ＆ Mather and a classification of land use. The thematic maps were associated in GIS with a geological base, soil vector, defining landscape units.

面向对象的软件分析与设计——基于UML、面向对象的系统分析设计方法

统一建模语言UML是面向对象软件设计的新技术。文章分析了基于UML进行面向对象的系统分析度设计方法，包括静态建模和动态建模，‘介绍了一种实用的基于UML的需求分析及其建模方法，以活动图模型来表达业务模型，以概念层的对象图、状态图及交互图模型表达系统的结构逻辑及行为逻辑，以应用例图表达系统需求，讨论了需求分析及其建模的过程概念。

特高压与超高压交流输电能力及经济比较研究

自我国交流特高压工程规划和建设以来,国内对特高压交流输电的输电能力、经济性、实施效果等方面存在较大的争议。本文通过建立特高压交流与超高压交流点对网和网对网的输电系统仿真模型,采用理论分析和仿真计算相结合的技术手段,针对不同输电距离和系统强度情况,从热稳极限、暂稳极限角度对比分析了特高压交流与超高压交流输电线路的送电能力,并以送受端同样系统强度下相同输电距离输送同等容量电力为例,对比分析了特高压交流输电与超高压交流输电的经济性,从而研究特高压与超高压交流输电在输电能力和经济性方面的优劣。研究表明,在相同的输电距离情况下,特高压交流的最大输电能力是超高压交流输电的2~4倍;相同输电容量下中短距离输电时,超高压交流输电经济性优于交流特高压输电。

An effective fault prediction model developed using an extreme learning machine with various kernel methods

System analysts often use software fault prediction models to identify fault-prone modules during the design phase of the software development life cycle. The models help predict faulty modules based on the software metrics that are input to the models. In this study, we consider 20 types of metrics to develop a model using an extreme learning machine associated with various kernel methods. We evaluate the effectiveness of the mode using a proposed framework based on the cost and efficiency in the testing phases. The evaluation process is carried out by considering case studies for 30 object-oriented software systems. Experimental results demonstrate that the application of a fault prediction model is suitable for projects with the percentage of faulty classes below a certain threshold, which depends on the efficiency of fault identification(low: 47.28%; median: 39.24%; high: 25.72%). We consider nine feature selection techniques to remove the irrelevant metrics and to select the best set of source code metrics for fault prediction.

A Systems-Science-Based Knowledge Explanation Method

Systems Science principles are the universal fundamental philosophical principles for analyzing, understanding, reforming and perfecting the objective world. This paper presents a Systems-Science-Based Knowledge Model (SSBKM) to establish a more general knowledge structure model. It can be regarded as a development of frame representation for discovering and constructing slot structures as well as the frame structures. With this model the paper also presents a System-Sciences-Based Object-Oriented Analysis method (SSBOOA), which is a strategy to find and determine object classes and class structures, the relations between object instances of different classes, not to just explain classes. Finally, the paper illustrates knowledge analysis and computerizing (synthesizing) steps in an example of SSBKM of cognitive psychology-based CAI Network for Teaching Middle School Mathematics.