Multiple Objective Genetic Algorithms for Path-planning Optimization in Autonomous Mobile Robots

This paper describes the use of a genetic algorithm (GA) for the problem of offline point-to-point autonomous mobile robot path planning. The problem consists of generating “valid” paths or trajectories, for an Holonomic Robot to use to move from a starting position to a destination across a flat map of a terrain, represented by a two-dimensional grid, with obstacles and dangerous ground that the Robot must evade. This means that the GA optimizes possible paths based on two criteria: length and difficulty. First, we decided to use a conventional GA to evaluate its ability to solve this problem (using only one criteria for optimization). Due to the fact that we also wanted to optimize paths under two criteria or objectives, then we extended the conventional GA to implement the ideas of Pareto optimality, making it a multi-objective genetic algorithm (MOGA). We describe useful performance measures and simulation results of the conventional GA and of the MOGA that show that both types of GAs are effective tools for solving the point-to-point path-planning problem.     

基于校园网的教育技术资源应用探析

校园网是教育技术资源的组成部分,校园网的教育技术功能主要体现在教育信息资源的管理、代替经验和网络虚拟等方面.教育技术资源应用要依托校园网,基于校园网的教育技术资源应用可以运用深度拓展校园网的功能、提升师生教育技术资源应用的认识和构建基于校园网的教育技术应用体系等策略.     

LCD“Vista认证”五大悬疑解析

操作系统的Vista时代到来，硬件厂商开始大面积跟进，恨不得马上给产品贴上Vista的标签，微软公司也适时推出了“Windows Vista Logo Program”，只要通过了这个标准，就等于是微软告诉你：这个东东用来跑Vista，不错。[编者按]     

基于中间件技术的综合教务管理系统的设计

介绍了一种开发基于Web的教务管理信息系统的实现框架.利用JSP/Servlet技术,采用成熟的三层体系结构,结合MVC设计模式,使得开发过程更加灵活,更加易于维护.     

我国教育网站评价存在的问题及评价指标体系的初步确立

目前，我国教育网站数量多、种类杂、质量参差不齐，人们需要对它们做出科学合理的分析和评价。然而，我国教育网站评价存在一系列的问题。本文针对这些问题提出建立一套科学合理的评价指标体系的重要性，并建立了教育网站评价指标体系的初步框架。     

MOTGA: A multiobjective Tchebycheff based genetic algorithm for the multidimensional knapsack problem

This paper presents a new multiobjective genetic algorithm based on the Tchebycheff scalarizing function, which aims to generate a good approximation of the nondominated solution set of the multiobjective problem. The algorithm performs several stages, each one intended for searching potentially nondominated solutions in a different part of the Pareto front. Pre-defined weight vectors act as pivots to define the weighted-Tchebycheff scalarizing functions used in each stage. Therefore, each stage focuses the search on a specific region, leading to an iterative approximation of the entire nondominated set.     

Using Elitist Particle Swarm Optimization to Facilitate Bicriterion Time-Cost Trade-Off Analysis

The present study develops a new optimization algorithm to find the complete time-cost profile (Pareto front) over a set of feasible project durations, i.e., it solves the time-cost trade-off problem. To improve existing methods, the proposed algorithm aims to achieve three goals: (1) to obtain the entire Pareto front in a single run; (2) to be insensitive to the scales of time and cost; and (3) to treat all existing types of activity time-cost functions, such as linear, nonlinear, discrete, discontinuous, and a hybrid of the above. The proposed algorithm modifies a population-based search procedure, particle swarm optimization, by adopting an elite archiving scheme to store nondominated solutions and by aptly using members of the archive to direct further search. Through a fast food outlet example, the proposed algorithm is shown effective and efficient in conducting advanced bicriterion time-cost analysis. Future applications of the proposed algorithm are suggested in the conclusion.     

基于项目质量控制人的因素研究

人的因素是项目质量控制中的第一因素。项目经理不仅要具备计划、组织、控制及技术等技能，还应具备良好的沟通技巧、处理压力和协调能力，同时要分清项目经理和职能经理的职责，赋予项目经理与责任相应的权力。由于项目组织是一个团队，做好团队内的有效沟通、项目的协调是工作的必要条件，同时需要适当的授权，使每一个相关责任人都主动、自觉地去工作，以期达到项目质量控制的目标。     

关于核电厂安全目标的确定问题

介绍了有关核电厂定性安全目标、定量安全目标和概率安全目标的定义,讨论了确定这些目标时所涉及的一些问题.     

Applying a constructivist and collaborative methodological approach in engineering education

In this paper, a methodological educational proposal based on constructivism and collaborative learning theories is described. The suggested approach has been successfully applied to a subject entitled “Computer Architecture and Engineering” in a Computer Science degree in the University of La Laguna in Spain.