复合混沌-人工鱼群混合算法的改进及性能研究

针对人工鱼群算法在寻优过程中接近最优点时收敛速度下降而难以得到精确解,优化复杂问题时易陷入局部极值的缺点,提出了一种复合混沌搜索技术与改进人工鱼群算法相结合的混合算法。该算法采用更具遍历性的组合映射产生复合混沌局部搜索方法,来避免人工鱼长时间陷入局部极值区域,从而更加精确地达到全局最优点;同时,对人工鱼引入反馈-吞食行为进行改进,改进的人工鱼群算法降低了优化后期的复杂度,并提高了优化精度,保证了收敛效率。实验结果表明,在相同参数条件下,该混合算法的收敛速度、优化精度和全局寻优能力均优于基本人工鱼群算法,实例验证了算法的有效性。     

Compound control of a compound cosine function neural network and PD for manipulators

In this paper, a compound cosine function neural network controller for manipulators is presented based on the combination of a cosine function and a unipolar sigmoid function. The compound control scheme based on a proportional-differential (PD) feedback control plus the cosine function neural network feedforward control is used for the tracking control of manipulators. The advantages of the compound control are that the system model does not need to be identified beforehand in the manipulator control system and it can achieve better adaptive control in an on-line continuous learning manner. The simulation results for the two-link manipulator show that the proposed compound control has higher tracking accuracy and better robustness than the conventional PD controllers in the position trajectory tracking control for the manipulator. Therefore, the compound cosine function neural network controller provides a novel approach for the manipulator control with uncertain nonlinear problems.     

一种基于体育径赛的动态分组算法的设计与实现

常用的运动会管理软件中体育径赛项目分组分道多以固定八道处理,编排算法固定,存在一定的缺陷。本文提出了一种不受道数限制的动态分组算法,详细论述了该算法的设计思想,结合Office.NET组件技术论述了如何将此算法应用到校园田径运动会的秩序册编排系统中,有效地实现了灵活的径赛分组分道的编排任务。实验证明,利用本文提出的动态分组算法,可以对体育径赛项目进行灵活快捷地分组,在一定程度上弥补了目前运动会管理软件的不足。     

塔河油田碳酸盐岩缝洞型油藏大型复合酸压选井优化论证

大型复合酸压是塔河油田针对碳酸盐岩缝洞型油藏常规酸压未建产或产能低的油井提出的一项新型重复酸压改造技术。该技术提高或恢复了部分低产低效及未建产井产能，增油效果明显，但存在一定的差异。在系统分析大型复合酸压井前期油藏特征和酸压效果基础之上，提出了大型复合酸压的地质选井原则。分析认为，高效大型复合酸压井主要选择位于油气富集有利部位、地震属性特征较好（振幅变化率强、反射体规模较大）、前期酸压显示未有效沟通的储集体、生产能量不足且产能较低（累产低）、注水替油效果不佳的井，同时在具有前述地质特征条件下距储集体中心距离较大的井优先选择。     

复合式空调机组的优缺点分析

对近年来出现的组合式空调机组新的组合形式－复合式空调机组进行了讨论。在占用空间场地，造价，可靠性，能耗等方面，对其优缺点进行了分析。     

Life on the line: Job demands, perceived co-worker support for safety, and hazardous work events.

The present study of 334 United Kingdom trackside workers tested an interaction hypothesis. We hypothesized, drawing on the job demands-resources framework, that perceived support for safety (from senior managers, supervisors, and coworkers) as job resources would weaken the relationship between higher job demands and more frequent hazardous work events. Consistent with social impact theory, we predicted that perceived coworker support for safety would be particularly influential when trackside workers faced higher job demands. Moderated multiple regression showed that, of all three sources of perceived support for safety, perceived coworker support for safety was most important for keeping employees safe in the face of high job demands. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

IBX在有机合成中的应用研究进展

对高价碘化合物邻碘酰苯甲酸（IBX）用于有机合成反应，如氧化、加成、取代和重排的最新研究进展进行了概述。     

Scheduling and sequencing of rubber compounds on banbury mixers in a tyre company

Scheduling and sequencing compounds on banbury mixers is a daily production planning function in a tyre company. The current scheduling procedures are based on experience. A number of factors, such as, capacity, cost, time, speed, set-up of mixers, compound changeovers, density and demand of compound, have to be considered during planning. In this paper, we propose a two-stage approach to this problem. This approach can be easily computerised to aid the personnel in the planning function. An example, considering actual data obtained from the company, is used to illustrate the approach. The current scheduling practice by company personnel, as inferred from past record, is also reported.     

从溴虫腈的结构来探讨新杀虫剂创新思路

新农药创制工作必须借鉴国外成功开发农药的经验，利用先导化合物进行结构修饰是我国新农药创制的一条捷径。     

对注射模配合零件中“避空”的分析

例举了注射模各配合零件中，20多例“避空”的实例，用以阐明“避空结构”在注射模各配合零件中的具体位置、尺寸、功能以及对模具质量和对制品质量的影响。