An Inverse Power Generation Mechanism Based Fruit Fly Algorithm for Function Optimization

As a novel population-based optimization algorithm, fruit fly optimization(FFO) algorithm is inspired by the foraging behavior of fruit flies and possesses the advantages of simple search operations and easy implementation. Just like most population-based evolutionary algorithms, the basic FFO also suffers from being trapped in local optima for function optimization due to premature convergence.In this paper, an improved FFO, named IPGS-FFO, is proposed in which two novel strategies are incorporated into the conventional FFO. Specifically, a smell sensitivity parameter together with an inverse power generation mechanism(IPGS) is introduced to enhance local exploitation. Moreover,a dynamic shrinking search radius strategy is incorporated so as to enhance the global exploration over search space by adaptively adjusting the searching area in the problem domain. The statistical performance of FFO, the proposed IPGS-FFO, three state-of-the-art FFO variants, and six metaheuristics are tested on twenty-six well-known unimodal and multimodal benchmark functions with dimension 30, respectively. Experimental results and comparisons show that the proposed IPGS-FFO achieves better performance than three FFO variants and competitive performance against six other meta-heuristics in terms of the solution accuracy and convergence rate.     

极值长与拟共形映照的Holder连续性

本文用极值长刻划了单连通区域ＤＲ。到Ｂｎ单位球），及Ｂｎ到Ｄ的高维拟共形映照的Ｈ１ｄｅｒ连续性，得出了一些充分和必要条件．主题词     

运输问题最小运费合理分摊的对策模型及解法

本文借助于合作多人对策的思想建立起了运输问题中最小运费合理分摊的数学模型，同时给出了建立理想分摊向量和特征函数的一种方法，并提供了一种 简便、有效的模型解法，比较有效地解决了运输问题中最小运费人合理分摊问题，为最优运输方案的实际实施提供了前提和保障。     

素环的反自同构与交换性

设Ｒ是特征不等于２的素环，Ｔ为Ｒ的非对合（Ｔ￣２≠１）反自同构，若Ｒ满足如下条件之一，则Ｒ为交换环：（ｉ）ｘ￣２ｘ￣Ｔ－ｘ￣Ｔｘ￣２∈Ｚ（Ｒ），ｘ∈Ｒ；（ｉｉ）ｘ￣２ｘ￣Ｔ－ｘｘ￣Ｔｘ∈Ｚ（Ｒ），ｘ∈Ｒ．     

集成结构建模框架

结构建模为模型理论和实践奠定了坚实的基础。近五年来，国外学者已有上百篇有关结构建模的研究论文发表。本文对结构建模框架进行了重构，提出了集成结构建模柜架，它克服了结构建模中基础结构、类属结构和模式结构分离的缺点；它既是理想的内部描述框架又是理想的外部描述框架；它具有明确的模型输入和输出边界以及边界的自解析能力。同时，框架蕴含的函数关系便于建模语言吸收非过程性的数据查询和非过程性函数语言的双重优点，消除了结构建模语言（ＳＭＬ）中的脚标。更重要的是该框架解决了长期得不到解决的模型操作问题。     

泡沫分离技术的研究——Ⅱ.泡沫分离塔的设计放大方法

根据对泡沫分离塔鼓泡区和逆流泡沫区内气-液两相流的分析,以及对表面活性剂在气-液表面吸附传质的研究,提出了一套稳态操作条件下的泡沫分离塔的设计和放大方法,并设计了一套中试规模的恒径泡沫分离塔。     

对逆变器进行脉宽调制的面积等值算法

本文叙述了对逆变器进行脉宽调制的新算法——面积等值算法的基本原理;对逆变器输出波形进行了谐波分析;给出了用TP 801单板机实现该算法的硬软件结构以及实验结果。