A review of robust design methods for multiple responses

Problems in engineering design often involve determining design variable settings to optimize individual product performance for multiple criteria, which are often in conflict. We review mathematically rigorous techniques from the statistical literature for finding a vector x of design variable settings, which produces an optimal compromise solution among a group of prioritized response variables. The best compromise solution is typically gained by optimizing an objective function, which incorporates the prioritized demands of multiple responses. Since most multi-response objective functions are constructed by combining the functions used to optimize univariate responses, a review of the prominent univariate approaches is presented first. A multivariate approach from the engineering literature called the compromise Decision Support Problem is also reviewed. Finally a table comparing the relative merits of the different multivariate approaches summarizes the article in a concise and user-friendly fashion.     

浅谈湖滨带生态恢复建设工程施工监理的特点

指出湖滨带是连接湖泊水体和陆地的一个功能过渡界面区。它作为生物的重要栖息地,具有净化水质、缓解波浪等多种功能。因此,对湖滨带实行生态恢复建设,应予以高度的重视。笔者通过具体工程的实践,阐述了湖滨带生态恢复建设工程的特点、施工阶段的监理工作,以及对监理人员的素质要求,可供类似工程借鉴、参考。     

Recursive calculation of ladder circuit frequency functions

It is shown how the transfer function as well as the input impedance and admittance of any linear time-invariant ladder circuit can be determined in closed form as frequency functions dependent upon the network element parameters. All elements of the ladder circuit must be explicitly specified by their frequency characteristics. The results are achieved with the aid of recursive algorithms. The outcome is demonstrated by means of an example.     

抚河流域水生态环境恢复措施初探

简述江西省抚河流域的概况、水生态环境的现状及存在的问题.包括淤泥的堆积、水土的流失、水污染、沿岸圩堤的防洪标准普遍偏低等.并对这些问题提出了流域水生态环境恢复的目标,针对抚河流域水生态环境的恢复目标提出了水权分配、水土保持治理、水工程治理、水质治理等方面的一系列初步的措施与建议.     

A scheme to randomly generate surface dust points for the 3D complex variable boundary element method (CVBEM)

A scheme to randomly generate dust points on the surface of a three-dimensional (3D) object is proposed. This scheme will potentially eliminate the bias of a density of points which are approximately equally spaced on the surface, as well as eliminate possible weighting requirements for areas of higher density. This method has the potential to reduce computational effort, as fewer points might be required to define the surface area. The global trial function vector can be assigned to these dust points and then entered into the complex variable boundary element method (CVBEM) commercial code. This scheme can be applied to each piece of a system that is comprised of a connected multiple geometry. A noticeable benefit of this approach is that the same problem can be studied several times, using a new random distribution of surface points each time. The smallest error can then be determined and that run selected. The Mathematica code used to generate the scheme is attached as an appendix.     

山东改造工程旧房质量检测

结合某成品仓库改作商业用房的工程实例,对该建筑进行了详细的检测与分析,并根据结果提出了针对性的加固方案,并对加固效果进行了探讨,为工程改造提供了依据,可供类似工程借鉴。     

水生生物环境诊断(AOD)技术应用研究

介绍一种新型的毒性试验方法——水生生物环境诊断(AOD)技术，该方法将冷冻浓缩和生物测试技术有机地相结合，较好地解决了低毒性水体的毒性测试问题。应用本项技术以红鳍鱼为受试生物，分别对湖北武汉马伧湖、墨水湖、广东深圳河、长江干流寸滩等几个断面、丹江口水库白河、丹江河口、老灌河等不同水体进行AOD测试，所得48hr-LC\-50结果与实际水质状况基本相符。     

H9000 V4.0计算机监控系统技术特点概要

为了满足三峡右岸电站的应用需要,在H9000 V3.0计算机监控系统的基础上研制开发了H9000 V4.0系统,改进和完善了原系统已有功能,开发了新功能,进一步提高了系统的性能指标和可靠性指标。文中主要介绍H9000 V4.0系统的设计原则,以及数据采集、人机联系、报表定制、Web信息发布、历史数据管理等主要新功能。     

复合功能原理方案特征建模及其求解过程研究

研制了驱动、传动和分离等典型功能原理方案解的知识库，建立了复合功能产品原理解的特征模型，提出了复合功能原理求解的通用进`生平注解和接口匹配并行的策略，进而提出原理解接口特征的嵌套结构及其匹配进程，开发了一个复合功能产品原理方案求解的计算机支持平台，进行了实例验证。