基于DDE技术分析的红外图像细节增强算法

在光电设备中,高位宽红外探测器由于具有高灵敏度、低噪声的特点而得到广泛应用。而通常的显示设备或快速处理只要求8位数据宽度,所以需要将高位宽的图像数据压缩至8位位宽。但是如果压缩方法处理不当,可能会造成原有信息丢失,在显示图像中表现为图像细节的损失。通过对FLIR公司数字图像细节增强（DDE）技术的分析,比较了DDE技术与以往常用红外图像动态范围压缩算法的区别,总结并提出了符合DDE思想的红外图像动态范围压缩细节增强算法,该算法在全面增强图像细节的同时能够抑制图像背景中的杂波,增强弱小目标,既满足图像显示的视觉效果,又有利于在图像上进行目标提取。     

基于DDE机理的组态王与MATLAB通信技术及应用

为了充分发挥组态王6.0的可视化界面功能与MATLAB强大的数值分析和图形绘制功能的各自优势,利用DDE技术,实现了组态王6.0与MATLAB的通信,开发了一种过程控制实验装置的实时监控系统。该监控系统具有实时监测、控制系统分析、控制系统设计等功能。应用表明：该实时监控系统运行可靠,操作方便,而且使得实时监控功能更加强大、灵活。     

VB通过DDE接口调用MATLAB中FIS文件的方法研究

文章分析了MATLAB环境下水箱液位模糊控制系统的系统结构、输入输出模糊隶属函数和模糊推理规则．给出了VB与MATLAB的DDE接口实现FIS文件调用方法,结果说明该方法是可行的。     

Analytical chemistry of the persistent organic pollutants identified in the Stockholm Convention: A review

Persistent organic pollutants (POPs) are major environmental concern due to their persistence, long-range transportability, bio-accumulation and potentially adverse effects on living organisms. Analytical chemistry plays an essential role in the measurement of POPs and provides important information on their distribution and environmental transformations. Much effort has been devoted during the last two decades to the development of faster, safer, more reliable and more sensitive analytical techniques for these pollutants. Since the Stockholm Convention (SC) on POPs was adopted 12 years ago, analytical methods have been extensively developed. This review article introduces recent analytical techniques and applications for the determination of POPs in environmental and biota samples, and summarizes the extraction, separation and instrumental analyses of the halogenated POPs. Also, this review covers important aspects for the analyses of SC POPs (e.g. lipid determination and quality assurance/quality control (QA/QC)), and finally discusses future trends for improving the POPs analyses and for potential new POPs.     

基于MCGS的生物质锅炉运行远程监控系统设计

针对生物质燃料锅炉系统多输入多输出的复杂动态特性,提出了一种生物质锅炉运行远程监控系统。通过运用MCGS组态技术和DDE技术,进行MCGS与MATLAB的数据通信,实现了锅炉现场的动态数据采集、实时监控以及生物质燃料锅炉控制系统的优化控制研究。系统具有控制精度高、实时监控、良好人机对话、组态图形清晰直观的特点,有效保证了生物质燃料锅炉经济安全稳定运行。     

Predicting the Fate and Effects of Chlorinated Hydrocarbons in a Coastal Marine System—South-East Indian Ocean

Abstract

Blubber samples of dolphins collected in the south-east Indian Ocean all show traces of the persistent organochlorine compounds. The bottlenosed dolphin, which feeds close to shore, showed consistently higher levels than the common dolphin, which feeds further offshore. For both species, female cetaceans transfer approx. 80% of their residue load to their offspring during lactation. The DDE/t-DDT ratios indicate an ‘ageing’ of DDT in marine mammals from the south-east Indian Ocean, implying no major recent input of DDT to this region. The usefulness of organochlorines as chemical tracers in determining biological parameters is illustrated.     

Zur Einwirkung von Natriumhydroxid auf einige Insecticide (chlorierte Kohlenwasserstoffe) im Hinblick auf die semiquantitative dünnschicht-chromatographische Bestimmung von Gesamt-DDT (DDT + DDE) in der Milch

Ohne Zusammenfassung

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Effect of sodium hydroxide on some insecticides (chlorinated hydrocarbons) with regard to the semiquantitative TLC determination of total DDT (DDT + DDE) in milk

     

Demasking large dummy effects approach in revealing important interactions in Plackett–Burman experimental design

This paper presents a newly developed demasking large dummy effects (DDE) approach for identification of significant factor interactions in Plackett–Burman experimental design. Dummy factors, as imaginary factors, are not expected to contribute to the model, so the appearance of their high effect values could indicate the significance of the interactions they are confounded with. DDE approach consists of the screening of the large estimable effects, the calculation of the interactions that contribute the most to the large dummy effects from the alias matrix, and a single pass of all subsets regressions including preselected interactions and main factors for the final model tuning. Tested on experimentally obtained data from a robustness analysis of a method for the determination of raloxifene and its four impurities, DDE approach showed to create the models that have greater statistical power than the ones described with the main factors only, which makes them more reliable and accurate for the application. Additionally, because of the interactions selection criterion and final tuning phase of the strategy, DDE approach allows the creation of models that are likely to better describe the real systems, which increases the practical value. Copyright © 2012 John Wiley & Sons, Ltd.     

Galerkin approximations with embedded boundary conditions for retarded delay differential equations

Finite-dimensional approximations are developed for retarded delay differential equations (DDEs). The DDE system is equivalently posed as an initial-boundary value problem consisting of hyperbolic partial differential equations (PDEs). By exploiting the equivalence of partial derivatives in space and time, we develop a new PDE representation for the DDEs that is devoid of boundary conditions. The resulting boundary condition-free PDEs are discretized using the Galerkin method with Legendre polynomials as the basis functions, whereupon we obtain a system of ordinary differential equations (ODEs) that is a finite-dimensional approximation of the original DDE system. We present several numerical examples comparing the solution obtained using the approximate ODEs to the direct numerical simulation of the original non-linear DDEs. Stability charts developed using our method are compared to existing results for linear DDEs. The presented results clearly demonstrate that the equivalent boundary condition-free PDE formulation accurately captures the dynamic behaviour of the original DDE system and facilitates the application of control theory developed for systems governed by ODEs.