自适应阶梯模糊控制器的FPGA实现

采用自适应阶梯模糊控制方法对汽车制动装置中的电涡流缓速器进行控制,在FPGA芯片上实现自适应阶梯模糊控制器的第一级与第二级。详细介绍模糊控制器内部结构及各模块的实现方法,并对模糊推理算法进行优化。最后在FPGA开发板上进行了仿真测试。     

GF(2233)域上正规基模乘算法的FPGA实现研究

已有的对正规基模乘算法的研究大多针对较小的有限域，不利于将其直接扩展到像GF（2^233）等大有限域中进行FPGA设计实现。为在FPGA上实现正规基下的模乘算法，给出了一种在速度和资源两方面可以折衷的方案以及具体的FPGA实现算法，并实现了硬件描述语言程序设计。在Xilinx的FPGA器件的基础上，完成算法的仿真、综合、布局布线试验。试验表明，实现的模乘算法方案较其它方案更适合于FPGA编程实现。     

温室环境温度智能控制算法研究

智能控制算法是自动控制系统的关键技术，运用智能控制理论-模糊控制的理论，基于作物生长环境的需求，提出了温室环境温度的模糊控制算法-可调因子多模型模糊控制算法，并对模糊控制器进行了参数优化。在作物生长的三个时区进行了仿真，仿真结果验证了所提出的算法有效性。     

Turbo简化译码算法的FPGA设计与实现

在深入分析Turbo译码算法的基础上,采用MAX-LOG-MAP算法进行了Turbo码译码器的FPGA设计与实现,并给出相应实现参数和结构。对FPGA的实现与MATLAB浮点算法做了仿真比较。     

基于ARM电冰箱模糊控制系统的仿真与设计

本文主要介绍基于MATLAB的模糊控制系统设计、仿真以及模糊控制系统在ARM上的实现算法。MATLAB的模糊工具箱和simulink提供了强大的功能，可以方便快速地设计模糊控制系统及其仿真。在ARM芯片上实现模糊控制算法，模糊控制表采用新方法二维矩阵存储，以便方便查询和管理，更好地满足温度调节的实时性。     

基于Systolic阵的IQRD-SMI算法的研究与FPGA优化实现

针对自适应波束形成系统中权值求解计算量大的问题,研究了基于LCMV的逆QR分解算法(IQRD-SMI算法) 及其传统脉动流水的GR-TSA实现结构,在Matlab中对算法以脉动阵搭建并进行算法仿真;分析了CORDIC技术的原理以及如何利用它在FPGA上实现Systolic阵中的处理单元;在此基础上,给出一种基于Systolic阵列的复用IQRD-SMI算法实现结构GR-ITSA,比较了它与已有文献中结构的异同;基于ISE软件,在Xilinx的xc7k325t型FPGA上实现了基于脉动阵列的IQRD-SMI算法的底层设计和硬件仿真,并将FPGA定点仿真数据回传Matlab与计算机浮点仿真数据对比,进而进行系统的性能与误差分析。     

基于Simulink变论域算法仿真技术研究

针对目前通过Simulink模糊控制工具箱对变论域模糊控制算法仿真缺少理论支撑的现象,利用模糊数学理论,推导出变论域模糊控制插值函数,并对此插值函数分析得出：将伸缩因子的作用对象向输入输出移动而保持论域固定可等效实现变论域算法。为验证理论,以单相逆变电源为例,在Simulink中搭建变论域模糊控制+PID算法仿真模型。实验结果表明其具有良好控制效果,为借Simulink模糊控制工具箱仿真变论域模糊控制算法提供了理论依据和方法,验证了上述理论研究和结论。     

语音信号线性预测分析斜格法的FPGA实现

针对语音信号线性预测分析经典算法的缺陷,提出了线性预测分析的改进算法,分析其原理、运算步骤及求解方法。研究了算法的FPGA实现,采用Verilog HDL语言对算法完成建模,使用QuartusII进行综合编译,通过Modelsim进行仿真验证。实验结果表明,FPGA实现结构简单,消耗资源少,运算速度较软件实现大幅提高,稳定性与参数精度满足理论要求。     

基于SYSGEN的OVCDMA硬件协仿真设计

介绍了一种借助SYSGEN(System Generator)和Matlab对FPGA硬件电路算法进行实时协仿真的设计。在FPGA平台上设计OVCDMA的硬件逻辑算法,并定义电路板与控制计算机的数据交换格式,利用SYSGEN的软硬件协同仿真功能,实现了对FPGA算法程序的实时仿真,验证了硬件程序的可靠性,证明了OVCDMA算法的硬件逻辑的性能。     

溶解氧模糊控制器的FPGA设计与实现

为提高溶解氧浓度(DO)自动控制的实时性与稳定性,根据污水处理过程中溶解氧浓度控制和模糊控制的相关原理,设计并实现了基于FPGA的溶解氧模糊控制器.该设计基于QuartusII9.1开发平台,结合FPGA实时性强和稳定性高的特点,使用VHDL语言,运用查表法的思想,并利用Matlab模糊控制工具箱计算出溶解氧模糊控制表.仿真结果表明,该模糊控制器能够实现对溶解氧浓度的实时控制.     

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.