Predictive modeling of mercury speciation in combustion flue gases using GMDH-based abductive networks

Modeling mercury speciation is an important requirement for estimating harmful emissions from coal-fired power plants and developing strategies to reduce them. First-principle models based on chemical, kinetic, and thermodynamic aspects exist, but these are complex and difficult to develop. The use of modern data-based machine learning techniques has been recently introduced, including neural networks. Here we propose an alternative approach using abductive networks based on the group method of data handling (GMDH) algorithm, with the advantages of simplified and more automated model synthesis, automatic selection of significant inputs, and more transparent input–output model relationships. Models were developed for predicting three types of mercury speciation (elemental, oxidized, and particulate) using a small dataset containing six inputs parameters on the composition of the coal used and boiler operating conditions. Prediction performance compares favourably with neural network models developed using the same dataset, with correlation coefficients as high as 0.97 for training data. Network committees (ensembles) are proposed as a means of improving prediction accuracy, and suggestions are made for future work to further improve performance.     

校园网网络教育应用平台的设计与建设

本文首先分析了国内网络教育平台的现状,接着介绍了南通大学网络教育平台的建设情况,并阐述了网络教育平台建设的主要环节——网络课程建设的内容。     

编辑出版自动化技术在医药专业期刊编辑部的初步应用探讨

本文首先概述了编辑出版自动化技术的概念及最新进展,然后就其在医药专业期刊编辑部的初步应用进行了探讨,论述了计算机、网络、数据库技术在稿件的选题、组稿、编辑、审校、排版、印刷、出版中的具体应用,强调了构建基于网络的编辑出版自动化系统对期刊现代化建设的重要作用。     

关于成都膨胀土地区边坡稳定性的探讨

成都市三环路建设中 ,膨胀土边坡稳定性研究是大家关心的重要课题。膨胀土边坡土体中的吸力变化直接影响到其稳定性 ,参照“人工神经网络技术”中的吸力经验公式 ,以三环路东一B标段的路堤边坡为例 ,采用“条分法”进行预测分析 ,并有针对性地进行防护处理取得了较好的效果。     

智能小区中的网络和布线设计解决方案——智能建筑学术讨论系列文章之七

当前小区信息网络建设中存在多种实施方案。笔者分析比较了常用的几种典型方案的优劣。讨论了目前建设中的一些解决方法，提出了兼顾现状，适度超前的设计实施原则。     

智能化多业务网络

首先从不同角度分析了通信服务商目前面临的环境,包括通信服务业的投资趋势、业务发展趋势、服务提供商的业务收入情况以及用户的需求;接着介绍了朗讯的智能化多业务网络的整体架构和解决方案;其中重点描述了智能化多业务网络在网络传输层、业务控制层和应用层上的智能化以及包括核心网络、城域网络在内的六大解决方案。     

网络化时代包装企业的网络安全

分析了当前包装企业加强网络安全工作的必要性，并给出了相应的网络安全策略。     

正确把握电信发展规律

二十世纪末，全球网络经济过热和电信业陷入之际，正是中国电信业深化体制改革、破除垄断、全面引入竞争之时。面对复杂的国际国内形势，中国电信业在一系列关系发展全局的重大问题上，坚持理性与务实，保持了行业积极稳健的发展。我国电信业目前正处于新的发展时期，面对新的机遇和挑战，在总结国内外实践的基础上，要进一步加深对电信发展基本问题的认识，要正确处理好一系列带有全球性、战略性、方向性的重大关系问题。     

分散网络制造浅谈

网络社会的制造业将是一个全球化的分散型的制造体系.分散网络制造是基于互联网的制造活动,因此,它具开放的、虚拟的,以及资源和技术更合理配置的特点.其组织模式是多种多样的,按现今国防工业现状,宜采用项目领导小组统一协调和控制下的分阶段动态联盟更为合适.为此,分析了网络无序化、企业属性知识不足、利益分配不易等问题带来的困难,并提出了一些建议.     

General rate equations and their applications for cyclic reaction networks: multi-cycle systems

The network reduction technique and the Bodenstein approximation of quasi-stationary behavior of reaction intermediates were systematically applied to derive general yield ratio and rate equations for multi-cycle reaction networks in homogeneous catalysis. Dual-cycle reaction networks connected by a linear pathway, multi-cycle networks stemming from the same intermediate, and single-cycle with arbitrary number of pathways between two intermediates were considered. The general yield ratio and rate equations derived in this study are applicable for most enzymatic reactions and for homogeneous catalytic reactions. Examples of homogeneous catalysis were used to illustrate the application of the general yield ratio and rate equations for network elucidation.