遗传算法在基于内容的图像检索中的应用

利用遗传算法对图像的统计特征进行了特征选取，并应用于颅脑CT图像检索中。实验结果表明，该方法能够有效地选取特征，提高检索精度，改善检索效果。     

基于内容的智能图像检索系统设计

由于Internet中的图像信息资源是异构的．人们要想从中发现、收集和维护自己需要的信息要花费大量的时间和精力。为了更有效地利用Internet上的图像资源，文章从基于内容的图像检索的现状出发，运用Agent技术，提出了一种基于内容的智能图像检索系统的初步模型，并设计了其中核心部分的基本结构：用户Agent、协调器和信息Agent，从而弥补了现有图像检索系统在自适应用户兴趣和交互式等方面的不足，提高了系统的检索正确率和检索能力。     

基于内容的图像检索介绍

基于内容特征的图象检索（CBIR）是目前国内外研究的一个热点。本文简要介绍了基于内容的图像检索技术的发展过程及主要原理，重点论述了基于内容的图像检索常用关键技术——图像视觉特征的描述和提取。     

基于空间信息的直方图图像检索

从具有同一灰度的像素角度出发,寻找空间分布差异,引入面积变量,构造了平均面积直方图,间接捕捉到色彩的空间分布特征,从而能够区别色彩分布相似但空间分布不同的图像,尤其适用于纹理丰富的图像的检索,获得了满意的效果.     

互联网WWW图像搜索引擎的研究与设计

分析了传统搜索引擎的图像搜索以及图像搜索引擎的原理与结构；在此基础上把基于内容的图像检索技术加入图像搜索引擎，设计了本文图像搜索引擎的框架结构，探讨了Robots、图片语义及低层特征的获取结构、索引数据库的结构与入库策略、以及用户访问界面的实现技术；最后，对当前的图像搜索技术局限性及发展趋势进行分析，探讨了图像搜索引擎的发展方向并提出了一些建议．     

一个基于语义的图像检索系统:VisEngine

介绍了一个基于语义的图像检索系统——VisEngine，该系统采用基于图像主要区域的图像分割方法，分别提取图像前景、背景和全局的视觉和抽象语义内容，构造相应的语义模板。接着把这些特征导入到一个面向对象的中间信息结构中，在此基础上进行多种方式的相似性匹配和检索。系统支持多种查询方式，用户交互界面自然友好。实验表明，VisEngine系统能有效地提高首次用户查询的正确性。     

基于内容的图像检索技术研究

介绍了基于内容的图像检索与文本关键词检索的不同，阐述了基于内容图像检索的基本原理、检索方式和关键技术以及医学图像检索方法。     

基于聚类的图像视觉内容检索和索引

图像是一种典型的可以大量获取的多媒体数据，对它们进行内容管理具有实际意义，描述在BOIC系统中提出并实现的基于聚类机制的图像视觉内容检索和索引方法．首先给出以视觉特征、空间结构、语义注释等来表示图像内容的模型；然后给出基于该模型的三个检索算法，包括基于视觉感知的颜色检索算法、轮廓检索算法、主色调扩展检索算法；最后给出采用集簇算法时媒体数据进行聚类的索引机制．它建立聚类索引表来缩小查询范围，从而提高了检索效率。     

一种基于色彩和灰度直方图的图像检索方法

提出一种综合图像的色彩信息、灰度信息和空间信息提取图像的特征向量的方法。该方法首先将图像从RGB空间转化为HSV空间，并进行非均匀量化；其次将彩色转化为灰度图像；然后将图像划分成互有重叠的4块，分别求出每块图像的色彩直方图、灰度直方图；最后采用这8个直方图作为图像的特征向量对图像进行检索。     

基于内容的图像检索在智能监控系统中的应用

针对基于内容的图像检索与识别在智能监控中应用的问题，建立了基于区域划分的颜色链码，利用图像颜色的区域特征值来构成一个区域与整体的特征描述，并将它应用到捕获图像的识别。捕获的图像，通过梯度特征对来定位与检测，对获取的脸部图像进行链码特征匹配与识别，并将计算结果作为监控系统的判断与决策依据。运用这一方法的监控系统，提高了监控系统的辨别对象能力，拓展了智能监控研究领域。     

Database management standards: status and applicability

This article presents the current status of existing and emerging ISO, ANSI, and FIPS standards for database management, specifically Database Languages NDL and SQL and Remote Database Access (RDA). It describes the general content of each standard and discusses its applicability, availability, completeness, maturity, stability, existing usage, and known limitations. Where appropriate, it also addresses the availability of conformance test suites and future plans for enhancements and follow-on standardization efforts.     

Ethical and legal issues for writing researchers in an age of media convergence

With the convergence of digital media into ever-widening social and technological networks for creation and distribution, the contexts for writing and the study of writing and writers have certainly changed. Researchers must navigate a dense matrix of ethical and legal issues in all phases of research when studying the ever-changing processes and products of digital communications. In this article, I draw from numerous sources to articulate a few of the challenges facing digital writing researchers in this age of convergence, focusing on issues of representation (researcher, participant, third-party), issues of informed consent, and issues of copyright and fair use.     

Environmental ergonomics: a review of principles, methods and models

A review of the principles, methods and models used in environmental ergonomics is provided in terms of the effects of heat and cold, vibration, noise and light on the health, comfort and performance of people. Environmental ergonomics is an integral part of the discipline of ergonomics and should be viewed and practised from that perspective. Humans do not respond to the environment in a way monotonically related to direct measures of the physical environment. There are human characteristics which determine human sensitivities and responses. Practical methods for assessing responses to individual environmental components are presented as well as responses to ‘total’ environments and current and proposed International Standards concerned with the ergonomics of the physical environment.     

Integration | Innovation | Inclusion: Values,Variables and the Design of Human Environments

Complexity, complication, contradiction, consumption, confusion, delusion, depression. Opportunity, inspiration, ingenuity, compassion, wisdom. Our world is perplexing, our times are fast moving, and our choices are many. To find an appropriate path is a daunting yet vital challenge that confronts us as individuals, as communities, and as a civilization. How sustainable is our world? How reasonable are our behaviors? The present article is a collection of thoughts on a series of intertwined issues related to the contemporary world, its environmental dimensions, and their present-day problems. The goal is to survey the landscape through a lens of Environmental Design, to provide some perspectives, to raise some questions, and to explore systems, beliefs, and values informing and influencing actions. It is important to consider how people's belief systems influence, inform, and shape actions. This holds true in realms political, spiritual, and cultural. It also proves relevant in the ways in which we imagine, design, develop, and construct our buildings, cities, spaces, and places.

Appropriate solutions to some of our most daunting problems will arise through the concerted efforts, open dialogue, and collective wisdom of the wide array of stakeholders, professionals, politicians, decision makers, and citizens (both engaged and disenfranchised) who have the will and wherewithal to make a difference and to make the world safer, healthier, and better. It seems vital for us to critically examine, and question, our belief systems and their connections to the ways we define, refine, and realize progress. Architecture and Environmental Design, in both a philosophical and a practical sense, reflect as well as form greater aspirations, directions, and events of our times.     

基于RGB-D信息的移动机器人SLAM和路径规划方法研究与实现

移动机器人在各种辅助任务中需具备自主定位、建图、路径规划与运动控制的能力。本文利用RGB-D信息和ORB-SLAM算法进行自主定位,结合点云数据和GMapping算法建立环境栅格地图,基于二次规划方法进行平滑可解析的路径规划,并设计非线性控制器,实现了由一个运动底盘、一个RGB-D传感器和一个运算平台组成的自主移动机器人系统。经实验验证,这一系统实现了复杂室内环境下的实时定位与建图、自主移动和障碍物规避。由此,为移动机器人的推广应用提供了一个硬件结构简单、性能良好、易扩展、经济性好、开发维护方便的解决方案。     

Interpretive Tools for 3-D Structural Geological Modelling Part II: Surface Design from Sparse Spatial Data

We present software tools and methods applicable to the geological modelling of sparse spatial and structural data within a 3-D digital environment. Free-form surfaces derived from section-style control frames and constrained by field-based structural measurements are employed as partially automated design aids intended to speed up and streamline the 3-D geological model building process. Some design degrees of freedom such as NURBS tension (or weights), knot sequencing and tying surface features are also discussed with examples drawn from spatial and structural data collected in Baffin Island by the Geological Survey of Canada and near-mine exploration data from Canadian mines. Interpolation of field-based structural measurements along the boundary of an unknown surface is also demonstrated. This work is potentially relevant to regional mappers and others dealing with sparse spatial and structural data, and/or conceptual surface modelling.     

Expert system verification and validation: a survey and tutorial

Assuring the quality of an expert system is critical. A poor quality system may make costly errors resulting in considerable damage to the user or owner of the system, such as financial loss or human suffering. Hence verification and validation, methods and techniques aimed at ensuring quality, are fundamentally important. This paper surveys the issues, methods and techniques for verifying and validating expert systems. Approaches to defining the quality of a system are discussed, drawing upon work in both computing and the model building disciplines, which leads to definitions of verification and validation and the associated concepts of credibility, assessment and evaluation. An approach to verification based upon the detection of anomalies is presented, and related to the concepts of consistency, completeness, correctness and redundancy. Automated tools for expert system verification are reviewed. Considerable attention is then given to the issues in structuring the validation process, particularly the establishment of the criteria by which the system is judged, the need to maintain objectivity, and the concept of reliability. This is followed by a review of validation methods for validating both the components of a system and the system as a whole, and includes examples of some useful statistical methods. Management of the verification and validation process is then considered, and it is seen that the location of methods for verification and validation in the development life-cycle is of prime importance.     

Real-world effectiveness of Ergonomic methods

The way ahead with the practical development and application of Ergonomic methods is through a better anticipation and appreciation of changes to system effectiveness and human work that will be incurred through the introduction of new technologies to the workplace. These improvements will involve an improved awareness by the system of the working context and environment. The argued future is with improvements in the handling and use of knowledge by systems. The development of suitable Ergonomics methods, or the careful adaptation of existing methods, should accompany any technological revolution. Moreover, future methods are needed that are specifically developed to be applicable to the real time study of work considering both work context and the amalgamation of results from the use of many diverse methods throughout the design and development life cycle of a system. Part of this process will be a necessary complementation of both quantitative and qualitative methods and guidelines. Another focus should be on creating improved Ergonomics participation within multidisciplinary system design and development environments throughout the system's life cycle. Only through this avenue can Ergonomics show a consistent and valued contribution to quality design and its development. In parallel to such a contribution will be an acceptance by other engineering disciplines, managers, and customers that such an application of Ergonomics is cost effective.     

面向集群服务器系统的监控平台综述

为保证云计算、高性能计算集群服务器系统的服务能力,需构建监控平台对各种来源数据的实现统一管理、统计分析和展现。本文面向集群服务器系统监控平台的搭建方式,综述当前各种常见的监控平台架构和组件,分析各类平台在部署、数据规模、统计分析能力以及时效性等方面的不同。分析结果表明,集群服务器系统监控平台搭建方案应根据监控数据规模、时效性要求、查询和统计需求选择方案。     

Access应用系统开发研究

Microsoft Access是一款出色的数据库管理工具和最佳的桌面数据库开发系统,本文从MS Office组件适用场合、数据库设计、界面与报表设计、VBA与宏的使用、安全性方面以及多用户应用系统开发策略等方面,论述了在进行Access应用系统实现过程中如何最大程度地发挥Access软件功能,高效地开发Access应用系统。