群体大小与群体创建决策方案数量的实验研究

针对口头面对面群体大小群体创建决策方案数量的影响进行了实验研究,实验主体包括3组平均年龄为21岁的本科生和1组平均年龄为33岁的工商管理硕士生,实验将各组分成1－17人不同大小的群体,任务属于想法产生类任务,实验结果表明,在该方式下群体创建方案的数量随群体人数增大呈中间高两头低的“n”形曲线变化,人均方案数量随群体人数增大而减小。     

云南省主要地质背景区铜、锰、锌、镁、钾在岩石-土壤-饲料系统的分布与迁移规律研究

对云南省6个主要地质背景区的土壤、岩石和饲料样品的铜、锰、锌、镁和钾元素进行测定分析。结果表明:玄武岩和碳酸盐岩红壤区土壤和饲料钾、镁、锌、锰和铜元素含量较丰富;碳酸盐岩、碎屑岩和玄武岩混合型黄红壤区居中;而由碎屑岩和变质岩发育的土壤区土壤和饲料钾、镁、锌、锰和铜元素最低。饲料中钾、镁、锌、锰和铜的含量受地质背景值,特别是土壤中元素的丰度的影响不大。     

计算机安全知识启示录

近年来计算机安全引起了越来越多人的关注,尤其是计算机病毒,因为随着电脑以及互联网的普及,计算机病毒给越来越多的人造成了损失,带来了不便。本人旨在通过介绍几种安全使用电脑及防范病毒的知识,使许多受病毒困扰的人能从中有所获益。     

Knowledge-Based Engineering System and Its Application in Missile Seeker Design

1 Introduction Computer-Aided Design (CAD) systems have been proven to be indispensable tools in many industrial sectors. However, traditional CAD systems are limited to the construction and manipulation of product models; they do not offer decision-making support. The practical use of CAD systems is very labor-intensive. Therefore it is necessary to integrate the various aspects of design process into a unified whole to support automatic product design. Knowledge-Based Engineering (KBE…     

Structure Design of Turbo-Jet Engine Blade with Feature Based Parametric Modeling

1 Introduction Aeroengine turbine blade, working in high temperature, high pressure and high speed conditions, is the key part of gas turbine engine. Structure design of turbine blade is very complicated because not only the geometric elements, such as the shape of exterior and interior surfaces, allocation of lots of features’ and their orientation affected its performance, but also the multidisciplinary design process, including aerodynamics, heat transfer, strength, vibration, etc. as show…     

QuickBird卫星影像处理技术实践

采用卫星遥感方法制作的数字正射影像是获取基础空间信息最快速、高效的手段,利用高精度卫星遥感成图,处理速度快、工艺简便、图像清晰,而且精度达到成图要求.本文重点介绍以QuickBird 0.6米全色和2.4米多光谱为数据源,制作DOM的技术要求、方法、工艺流程和质量控制指标.     

对抛物方程使用新显格式的区域分解算法

我们提出了两个具有改进稳定性限制条件的新显格式．与经典显格式相比,稳定性限制条 件分别对两维抛物问题放宽了4倍,对一维问题放宽了2倍,同时它的精度与经典全隐格式 的相同．然后,我们通过在内边界点使用大步长的这种新显格式,在内点使用全隐格式,设计 了一个有限差分区域分解算法,稳定性限制条件分别对一维抛物问题放宽了2m2倍,对二维 问题放宽了4m2倍．从而我们能使用一个大的时间步长,这使我们在并行求解抛物问题时能 节省大量的计算量．     

Coordinated formation control of multiple nonlinear systems

A general method of controller design is developed for the purpose of formation keeping and reconfiguration of nonlinear systems with multiple subsystems, such as the formation of multiple aircraft, ground vehicles, or robot arms. The model consists of multiple nonlinear systems. Controllers are designed to keep the subsystems in a required formation and to coordinate the subsystems in the presence of environmental changes. A step-by-step algorithm of controller design is developed. Sufficient conditions for the stability of formation tracking are proved. Simulations and experiments are conducted to demonstrate some useful coordination strategies such as movement with a leader, simultaneous movement, series connection of formatiom, and human-machine interaction.     

论汉语歇后语的英译策略

针对歇后语是汉民族文化独有的表达方式，英语中没有与之完全相对应的表达法，从歇后语的本质和英汉语之间的文化差异，探讨歇后语的翻译方法和应遵循的原则．     

一种桥梁评估专家系统的设计和实现

桥梁评估是桥梁维修和加固的重要依据。以桥梁评估专家系统为例，具体阐述了一种利用VC 对模糊推理专家系统实现的方法。讲述了这个专家系统所依据的2种评估方法：结构损伤度评估方法和承载力评估法。重点阐述了知识库的知识表示和推理机的实现。给出了整个系统的构成和评估流程图。实际工程应用表明，该专家系统具有良好的工程应用性。