Origin7.5在光电效应实验数据处理中的应用

应用Origin7.5软件能够快速准确处理光电效应实验数据,能够对辅助处理物理实验数据非常有效。     

基于协同进化基因表达式编程的函数发现研究

基因表达式编程（GEP）算法是一种具有强大函数发现能力的新型进化算法。GEP在函数发现时如何确定合适的数值常量对算法的性能具有很大影响。提出了一种基于协同进化基因表达式编程的函数发现算法（GEP-DE）,该算法的最大改进在于一种新的常量优化方法：在每一代中将函数发现的过程分为两个阶段：第一阶段,由标准GEP算法结合固定常量集确定函数结构;第二阶段,使用差分进化算法（DE）对第一阶段得出的函数结构的常量进行优化。实验结果表明,GEP-DE算法比重要文献中的常量处理方法其效果有较大提升,并且算法的综合性能也优于最新重要文献提出的GEP算法。     

特征保持的点模型简化技术研究

提出一种以物体表面上不附加任何几何和拓扑信息的散乱点集为处理对象,特征保持的点云数据简化的方法。通过直接在散乱点上计算曲率的方法,将数据点分为特征点和非特征点两类,分别应用不同参数的均值漂移聚类算法进行简化。实验结果表明算法既能有效简化点云数据,而且很好地保留了原网格模型的特征信息。     

基于CUDA的并行加速渲染算法

GPU可以快速有效的处理海量数据,因此在近些年成为图形图像数据处理领域的研究热点。针对现有GPU渲染中在处理含有大量相同或相似模型场景时存在资源利用率低下和带宽消耗过大的问题,在原有GPU渲染架构的基础上提出了一种基于CUDA的加速渲染方法。在该方法中,根据现有的GPU渲染模式构建对应的模型,通过模型找出其不足,从而引申出常量内存的概念;然后分析常量内存的特性以及对渲染产生的作用,从而引入基于常量内存控制的方法来实现渲染的加速,整个渲染过程可以通过渲染算法进行控制。实验结果表明,该方法对解决上述问题具有较好的效果,最终实现加速渲染。     

P2P网络支持复杂多维数据搜索的范围查询算法

讨论了P2P网络系统中基于EIR-tree树的范围查询处理算法的改进及其在多维数据查询搜索中的应用。论述了范围查询处理算法的思路和实现方法，并对该算法在多维数据查询搜索中的应用进行了相应的实验，确定了影响其效率和速度的主要因素。     

数字曲线切点检测技术

针对数字曲线的切点识别问题,提出一种基于转角累加的数字曲线切点检测技术。该技术对数字曲线进行光顺处理,构造转角累加线、转角累加线曲率线和曲率波,通过对相邻的分段逼近直线求交确定切点位置。实验结果表明,该方法切点识别准确、迅速,对于由直线、圆弧组成的轮廓边界能实现准确分段。     

MODIS数据Bowtie效应消除算法

MODIS数据不仅具有较高的过境频率和光谱分辨率,还具有成本低、覆盖面广等优势。受地球曲率的影响,MODIS L1B数据大多存在一种重叠效应,即Bowtie效应,主要发生在图像的边缘地带,该效应制约了MODIS遥感数据的进一步分析及应用。针对遥感影像几何畸变问题,提出一种不基于传统星历表的Bowtie效应消除算法,采用相关系数法确定每个扫描带的重复行数,根据不同分辨率的MODIS L1B数据,使用相对应的重采样方法对图像进行重采样处理。通过与其他Bowtie效应消除算法的对比实验及分析,证明该算法不仅能够有效去除Bowtie效应,而且执行速度较快,具有较高的工程应用价值。     

基于机器视觉的弧形件检测算法

为快速准确地对弧形零件特征参数进行检测,提出了一种基于机器视觉技术检测弧形件的各种特征参数的方法。该方法先采用Canny算子检测图像边缘,然后用三次样条插值方法对图像边缘进行插值并计算其亚像素坐标,最后采用基于切线方向的方法计算曲率值。对离散曲率数据进行处理,计算其均值和方差以及弧形件的弧长、夹角、面积等特征量。实验结果证明：该算法不仅精度高、速度快,而且稳定性好,能满足弧形零件特征参数的检测要求。     

模型的固有复杂度和泛化能力与几何曲率的关系

从微分几何角度考察与参数化形式无关的统计模型流形的固有复杂度,指出模型流形的Gauss-Kroneker曲率可以完全刻画模型流形在一点处的全部性质,进而分析了曲率与体积的关系;给出了基于参数估计量邻域附近的解轨迹方法的曲率计算方法;证明了用于衡量泛化能力的未来残差可以用模型的曲率来表示,由此给出一种新的以曲率度量模型复杂度的模型选择准则GKCIC;对几何方法和统计学习理论进行了分析比较.在人工数据集和真实数据集上的比较实验结果表明了文中提出的方法的有效性.     

一种基于曲率尺度空间的自适应角点检测方法

角点是图像处理中的重要特征,基于曲率尺度空间技术,提出一种自适应角点检测方法.首先提取图像的轮廓,采用一个固定的低尺度计算所有轮廓点的曲率,并根据曲率得到候选角点集,然后用由自适应支持区域确定的角点角度和一个动态曲率阙值代替固定的阙值筛选出正确角点.实验结果证实该方法应用于复杂图像的精确性和稳定性.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。