微量水分在线检测系统数学模型的建立

针对火药生产过程中要实时检测其含水量,设计了电容式水分检测传感器,并设计了自平衡电桥及其水分检测电路。由于要求检测的火药含水量低,约为0.5%~3%,且检测精度为0.1%,因此对影响含水量的温度、湿度、重量容积比和电压幅值等因素分别进行了研究,并根据多个参数建立了多元线性回归模型。经过大量物料实验,推导出本系统下仅与物料密度和物料重量容积比相关的通用公式,经过多次不同物料实验验证,该系统性能稳定可靠、测量准确,适合于多种物料的低含水量,高精度的快速测量。     

FGL-3型γ射线料位计及其应用

1.γ射线料位计基本原理γ射线料位计是基于放射性同位素所激发出来的γ射线而制成的料位计。它是一种非接触式仪器,可以用来测量化工各种贮罐、容器和塔器中的液体或固体料位。当γ射线穿过被测物料时,其射线强度被物料吸收而减弱。这种射线强度变化符合下列方程式:     

核辐射式皮带秤

核辐射式皮带秤是根据被测物料对γ射线的吸收作用来测量物料的多少,它具有非接触式称重的特点;安装简单、干扰因素少、性能稳定、适应范围广。全文较详细地叙述了它的原理、组成、特点、精确度等。     

一种带式输送机物料流量多点超声检测方法

针对单点超声测距技术用于带式输送机物料流量检测时,在煤块分布不均或存在较大煤块情况下测量误差较大的问题,提出了一种基于多点超声对向测距技术的带式输送机物料流量检测方法。该方法通过对物料表面和胶带表面进行多点坐标定位,计算出物料近似截面积,结合带式输送机运行速度,得出物料流量。试验结果表明,在运输煤块较大且不均匀的情况下,该方法的检测误差较单点超声测距技术小。     

夹紧情况检查

夹紧情况检查:物料搬运时利用气压来检查夹紧情况这是工业机器人和物料搬送的工作中利用气压来检测夹紧情况的图解。如果物料被夹紧,检测喷咀被堵住,由此可以检测出物料是否被夹住。检测出的气压信号经气动放大器再次放大     

MRP中物料净需求的算法研究

物料净需求计算是MRP计算中的一个关键环节,该文从应用的角度探讨了基于低层码的物料净需求算法。介绍了低层码的相关概念和物料净需求的详细计算过程,通过低层码,很好的控制了物料需求计算的顺序,提高了运行效率。     

基于KL变换的烟叶信号阈值优化方法

物料阈值空间的建立是图像识别的一个关键问题。在分析烟叶特性的基础上,对烟叶三基色信号进行KL变换,消除烟叶信号各元素之间的相关性,经过量化编码后,重新建立烟叶信号的三维阈值空间。与传统的建立阈值空间方法相比,新的阈值空间体积显著减小,有效地提高了烟叶检测和分级的精度。该方法简单方便,同样适用其它具有相关特性的物料的识别。     

基于KL变换的烟叶信号阈值优化方法

物料阈值空间的建立是图像识别的一个关键问题。在分析烟叶特性的基础上，对烟叶三基色信号进行KL变换，消除烟叶信号各元素之间的相关性，经过量化编码后，重新建立烟叶信号的三维阈值空间。与传统的建立阈值空间方法相比，新的阈值空间体积显著减小，有效地提高了烟叶检测和分级的精度。该方法简单方便，同样适用其它具有相关特性的物料的识别。     

核子秤二次仪表的研制

介绍一种以AT89C52单片机为核心的核子称二次仪表的软、硬件设计。根据射线穿过物料后强度衰减的原理，通过测定传输带速度和穿透物料的γ射线强度，进行传输带上物料的非接触、在线称量和控制。采用插值法计算常用对数，用平均、平滑和限幅等数字滤波器消除射线强度统计张落的影响，获得了满意的计算精度、重复性和响应速度。该仪表支持28项系统参数的设置，并具有模拟信号输出、打印机以及RS－232数据通讯接口，极大改善了其适应性。     

微波水分测量的研究

为了能快速、准确地检测物料中的水分含量,设计了一种微波水分检测系统。该系统的工作原理是基于微波透射过含水物料后,其功率变化、衰减量等与物料水分含量有关。该系统工作的中心频率是10.5 GHz;对温度变化、物体颜色及所含盐分等不敏感;水分测量范围可达5%~30%;测量精度为±1%;微波发射功率为10mW。该系统适合检测纸板、布等有一定厚度物料中的水分含量。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。