基于VC++6.0的浮选泡沫图像识别系统

浮选生产过程涉及许多变量以及存在严重的非线性,很难建立精确的数学模型,它的监控一直是困扰控制技术人员的难题.文中设计开发了一个用于选厂自动控制的浮选泡沫图像识别系统,并给出该系统Visual C++6.0的部分实现.利用该系统可以计算浮选泡沫图像的一些物理参数,通过这些物理参数以及浮选泡沫图像识别实验可以建立一定的数学模型,再通过这些数学模型可以精确预测浮选过程的工艺技术指标,从而为选厂过程的在线控制提供可靠数据依据.     

基于VC＋＋6．0的浮选泡沫图像识别系统

浮选生产过程涉及许多变量以及存在严重的非线性,很难建立精确的数学模型,它的监控一直是困扰控制技术人员的难题。文中设计开发了一个用于选厂自动控制的浮选泡沫图像识别系统，并给出该系统VisualC 6．0的部分实现。利用该系统可以计算浮选泡沫图像的一些物理参数，通过这些物理参数以及浮选泡沫图像识别实验可以建立一定的数学模型，再通过这些数学模型可以精确预测浮选过程的工艺技术指标,从而为选厂过程的在线控制提供可靠数据依据。     

泡沫图像处理技术在矿物浮选作业中的应用

结合云南省院省校合作项目浮选泡沫层测控系统开发及产业化研发过程,介绍一种基于数字图像处理及识别技术的浮选过程控制新思路。在浮选生产中,浮选泡沫表面纹理与浮选工况密切相关,直接反映泡沫层的矿化程度（品位高低）。通过对云南某铅锌矿选厂浮选泡沫图像的分析处理,提取出能够表示泡沫层特征的参数,达到间接测量气泡的大小、纹理、稳定性、流动性等泡沫层特征状况。采用邻域灰度相关矩阵法提取特征参数,然后用神经网络进行分类,给出浮选效果的分类判断。     

基于图像纹理特征和多级SVM的浮选过程状态识别方法研究

针对浮选泡沫图像的纹理特征,采用多级支持向量机(MLSVMs)方法对浮选生产过程状态进行识别.首先基于灰度共生矩阵,提取浮选泡沫图像的诸如能量、熵及惯性等纹理特性参数来描述浮选泡沫的视觉特征;然后采用归一化后的纹理特征数据样本分别对多级支持向量机进行训练和识别.MLSVMs模型核函数参数采用改进惯性权重的粒子群算法进行优化.测试结果表明,所提出的方法在训练时间和识别正确率上具有较好的性能,可以满足浮选过程的实时监控要求.     

浮选泡沫图像等效尺寸分布特征提取

利用图像分割方法提取浮选泡沫图像的尺寸分布特征易受光照影响, 鲁棒性不强, 而利用小波纹理分析方法提取泡沫图像纹理特征则具有多尺度统计特性, 对光照鲁棒性较强, 但没有形态学意义. 针对这一问题, 提出一种浮选泡沫图像等效尺寸分布特征提取方法, 提取一种新的浮选泡沫图像特征—–等效尺寸分布特征, 并将其应用于铜浮选泡沫图像分类识别. 实验结果表明, 所提取的等效尺寸分布特征可以有效区分3 种不同浮选工况所对应的泡沫图像.     

基于LBPV的浮选泡沫图像纹理特征提取*

在浮选生产中,浮选泡沫表面纹理与浮选工况密切相关,直接反映泡沫层的矿化程度(品位高低).为了给浮选操作提供指导,提出了一种基于LBPV( local binary pattern variance)的泡沫图像纹理特征提取方法.该方法通过融合泡沫图像局部空间结构和对比度来提取泡沫图像纹理特征,然后将LBPV纹理特征应用于...     

基于小波变换的浮选泡沫图像纹理特征提取

随矿物浮选工况的变化,精选泡沫表面出现亮度分布不均、灰度分布差异性大的特点,表现出明显的纹理特性。为定量分析精选泡沫表面纹理特征与浮选工况间的关系,采用小波变换方法提取纹理特征均匀度,实现精选泡沫表面纹理的量化描述,并通过实验分析,获得精选泡沫的最佳纹理区间。工业现场运行结果表明,该方法可以实时监视精选泡沫表面纹理特征变化,有利于浮选生产指标的优化 控制。     

基于图像处理的浮选过程药剂量控制模型

浮选过程有严重的非线性、强耦合性等问题,目前仍没有精确的数学模型描述浮选状态;通过研究赤铁矿阳离子反浮选控制工艺过程,提出利用图像处理技术提取泡沫图像纹理特征参数,采用粗糙集和LVQ神经网络理论建立控制药剂加入量的数学模型;经过现场应用与仿真对比,基于图像处理的控制模型可以满足浮选控制的要求,较好地解决了浮选过程的自动控制问题,为最终建立可以应用于企业生产的控制系统奠定了基础;采用粗糙集并基于LVQ神经网络理论建立药剂添加量控制模型,基于图像处理的控制模型识别准确度在正常状态下能达到83.3%的准确率,可以满足企业生产的要求。     

基于纹理粗细度测量的铝土矿浮选过程最佳精选泡沫状态分析

为实现铝土矿浮选生产工况的自动监测和智能评价,提出一种基于机器视觉的精选泡沫最佳生产状态量化分析与选择方法。首先,通过改进LBP算子实现精选泡沫图像表面纹理粗细度特征的提取;然后,进一步分析了精矿品位与精选泡沫纹理特征间的关系,以获得最佳生产工况下的精选泡沫表面纹理粗细度特征区间。该方法可以实时监测精选泡沫表面纹理的变化,并自动鉴别精选泡沫是否处于最佳生产状态,为实现铝土矿浮选过程优化控制奠定了基础。     

基于SIFT特征配准的浮选泡沫移动速度提取与分析

利用尺度不变特征转换(SIFT)特征的优势,将其特征配准引入到泡沫速度特征提取中,解决了泡沫速度特征难以提取的问题.工业浮选现场泡沫速度特征提取结果表明:该方法对仿射变换、光照变化等不敏感;可以准确获取各种浮选状态下泡沫移动速度特征.在对某轻金属浮选厂泡沫视觉特征进行为期半年的观察之后,讨论了浮选泡沫速度特征与浮选指标间的关系,为建立基于机器视觉的浮选优化控制打下基础.     

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     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.