用调优法进行去油试验

在生产实践中经常遇到优选的问题,例如晶体管生产工艺中如何确定最优的工艺条件,在电镀工艺中如何确定最优的电镀溶液配方等等,而怎样通过最少次数的试验,而能确定地、有步骤地来找到最优的工艺条件或最优的配方,这就是优选法所要解决的问题。这里想谈谈我们综合折纸法思想和逐步调优思想所做的一个双因素的优选方法,不妨称之为调优法(此法较适于同时可做四个以上实验的情况),当然这个方法还需要在实践中进一步完善。     

水电工程机电设备成套项目供应商灰靶优选

为进行水电工程机电设备成套项目供应商选择,综合运用灰色系统理论,提出供应商灰靶分析与优选方法.首先,结合机电设备成套项目特点,建立包括产品水平、企业条件、合作潜能、服务保障等4个一级指标和18个二级指标的水电工程机电设备成套项目供应商优选指标体系;然后,采用G1法确定指标权重,构建供应商灰靶优选模型,计算比较各序列靶心距;最后结合实例,为越南Song Bung 5水电站机电设备成套项目总承包商选择理想供应商.结果表明:通过建立供应商灰靶优选模型,实现各潜在供应商间的量化分析,有利于降低工程项目管理难度,最大限度发挥机电设备成套项目管理优势。     

正交试验在金属镀钛工艺中的应用

一、选题原因 河北省正定县工艺美术公司使用由河北省遵化县钛金设备厂生产的TC-1(改装)型φ450真空镀膜机进行钢制手表壳的镀钛生产时,按原定工艺数据,镀膜达不到要求的质量指标:牢固度和色深均不稳定,总体色差、单件色差和光亮度都不符合要求,成品率只有6%.为寻找合理工艺数据,供需双方一起努力,进行过多次试验,历时数月,问题仍然未能解决,最后决定采用正交试验法. 二、第一轮试验 1.经过认真分析,在对次要工艺条件进行充分简化和压缩的基础上,定出七个因素作为重点考察对象,其余因素保持良好固定状态, 用L13(6 1 × 3 6)正交表安排了第…     

基于正交试验设计的Ω焊缝焊接工艺参数的确定

为了确定CRDM焊接机焊接工艺参数,应用正交试验设计法进行了Ω焊缝焊接工艺评定试验,用数理统计方法分析了对焊缝质量产生影响的各焊接参数的主次顺序,得到了最优生产条件。     

正交设计与回归分析在水泥快速测定中的应用

一、内容提要 衡量水泥质量的现行国家标准(GB164—82)是采用养护28天的水泥胶砂强度来评定的.本文通过正交设计法安排试验条件,用回归分析法计算试验指标,对本钢建材厂生产的钢渣矿渣水泥,采用促凝压蒸法1.5小时强度来推定28天的强度.找出较佳的试验条件;进而在该条件下进行重复试验;最后得出在该条件下1.5小时强度与28天强度的回归方程.这对加快水泥生产,保证工程的质量和进程,有着很大的现实意义. 二、用正交法找出促凝压蒸法的最使试验条件 对本钢建材厂生产的钢渣矿渣水泥,采用国家规定的 4 X 4 X 16CC的试模,首先设法找出影响1.5…     

工艺参数优化程序包

一、优化程序包的应用一般工业生产中的工艺条件往往是有几个参量的,各种具体问题也往往有较多的因素起作用。在许多实际问题中也要解决多变量的优选问题。本程序包使用十分方便,只要根据实际生产情况,按规定要求进行一定数量的工艺试验。根据实验结果送入计算机程序中,在很短时间即可得到优化结果,并可以画出有关关系曲线图便于研究分析。本程序包运用于纺织、化工、机械和其它各行各业工艺参数最优化质量管理等方面,能够产生很好的经济效益。     

正交试验在华北油田推广应用

华北石油职工大学毕兆富讲师在我单位积极配合下,于一九八四年二季度主动到局属勘 探二公司、油建一公司、油田综合机械厂、井下作业公司、设计研究院、钻井工艺研究所和 采油工艺研究所等单位讲授“正交试验法”。参加听课的有局内各有关单位的工程技术人员 等三百余人。听课的同志普遍认为:正交试验法容易懂,实用性强,见效快。课后,毕兆富 同志深入现场具体帮助指导,与现场同志一起制订试验方案,并在短期内取得一批可喜成　果,在生产中见到了明显的经济效益。获得了我局八四年度科技成果三等奖。现简要介绍如 下: I回一 1、用正交试验法…     

应用正交试验确定环已醇最佳工艺条件

应用正交试验确定环已醇最佳工艺条件．本文采用正交试验的方法，对锦西化工总厂环已酮车间利用环已醇脱氢生产环已酮的生产工艺过程进行了正交试验设计，应用方差分析方法得出了最佳生产工艺条件，同时给出了经济效益分析评价     

ANOM和ANOR及其应用

１．问题的提出某电池厂为了提高二氧化锰的利用率，了解正极合剂配方对电池性能的影响，需要对Ｒ_６型干电池正极合剂配方进行优选试验，寻找出间隙放电时间长而稳定的配方．选用Ｌ_９（３~４）正交表做工艺参数重复优选试验；并用均值分析（ＡＮＯＭ）和极差分析（ＡＮＯＲ）对试验结果进行了分析，找出了Ｒ６型干电池正极合剂的优选且稳定的配方．具体设计为：我们对锰粉（Ａ）、碳（Ｂ）、氯化氨（Ａ）、水（Ｄ）等四个因素进行优选．将各因素分别取三个水平见表１．把Ａ、Ｂ．Ｃ、Ｄ四个因素顺次放入正交表Ｌ_９（３~４），且不考虑因…     

化学气浮法处理制革含硫废水工艺条件优选

制革含硫废水成份复杂,除了含有有毒物质硫化物外还含有大量的有机物和悬浮物,其中硫化物的含量大约占制革行业总排硫量的90—95%,因此有必要对合硫废水进行分割治理.本文在采用化学气浮工艺处理含硫废水中,借助正交实验法在实验室混凝搅拌机和小型气浮池上对工艺过程进行了优选.按优选的条件处理猪革含硫废水,不仅硫化物的去除率能达到90%,而且有机物和悬浮物的去除率可分别达到84.4%和90.6%,大大减少了试验次数,节约了时间和材料. 解析化学气浮法过程可分为两步,第一步往废水中加.一定量的化学混凝剂,混凝剂水解并与废水中的杂质作用形成…     

Global Existence of Strong Solutions of Navier-Stokes-Poisson Equations for One-Dimensional Isentropic Compressible Fluids

The authors prove two global existence results of strong solutions of the isentropic compressible Navier-Stokes-Poisson equations in one-dimensional bounded intervals. The first result shows only the existence. And the second one shows the existence and uniqueness result based on the first result, but the uniqueness requires some compatibility condition. In this paper the initial vacuum is allowed, and T is bounded.     

我国民间资本投资模型及其实证研究

首先对西方国家投资函数模型进行了综述,在分析这些模型与我国实际情况的基础上建立我国民间投资函数模型,然后运用该模型对我国民间投资进行实证分析。结果表明：本文提出的模型不仅可行而且其预测误差比普通线性回归模型预测误差小得多。     

NA序列部分和的矩完全收敛性

讨论了NA序列部分和的矩完全收敛性,在一定条件下获得了NA序列矩完全收敛的充要条件,显示了矩完全收敛和矩条件之间的关系,将独立同分布随机变量序列矩完全收敛的结果推广到NA序列,得到了与独立随机变量序列情形类似的结果.     

A new condition for certain trigonometric series

The present paper proposes a new natural weak condition to replace the quasimonotone and O-regularly varying quasimonotone conditions, and shows the conclusion of the main result in [10] still holds. Moreover, we prove that any O-regularly varying quasimonotone condition implies this condition, thus tne vague implication of quasimonotonicity can be avoided in practice.     

A mixed method of subspace iteration for Dirichlet eigenvalue problems

A full multigrid scheme was used in computing some eigenvalues of the Laplace eigenvalue problem with the Dirichlet boundary condition. We get a system of algebraic equations with an aid of finite difference method and apply subspace iteration method to the system to compute first some eigenvalues. The result shows that this is very effective in calculating some eigenvalues of this problem.     

非线性-线性二层规划问题的罚函数方法

利用下层问题的K-T最优性条件将下层为线性规划的一类非线性二层规划转化成相应的单层规划,同时取下层问题的互补条件为罚项,构造了该类非线性二层规划的罚问题.通过对相应罚问题性质的分析,得到了该类非线性二层规划问题的最优性条件,同时设计了该类二层规划问题的求解方法.数值结果表明该方法是可行、有效的.     

Initial trace for a doubly nonlinear parabolic equation

This paper studies the Cauchy problem for a doubly nonlinear parabolic equation. The main result shows that if there is a nonnegative solution of the Cauchy problem, then the initial trace of the solution is uniquely given as a nonnegative Borel measure satisfying an exponential growth condition. This extends the known result for the heat equation to the nonlinear case.     

Ergodicity of the BMAP/PH/s/s+K retrial queue with PH-retrial times

Define the traffic intensity as the ratio of the arrival rate to the service rate. This paper shows that the BMAP/PH/s/s+K retrial queue with PH-retrial times is ergodic if and only if its traffic intensity is less than one. The result implies that the BMAP/PH/s/s+K retrial queue with PH-retrial times and the corresponding BMAP/PH/s queue have the same condition for ergodicity, a fact which has been believed for a long time without rigorous proof. This paper also shows that the same condition is necessary and sufficient for two modified retrial queueing systems to be ergodic. In addition, conditions for ergodicity of two BMAP/PH/s/s+K retrial queues with PH-retrial times and impatient customers are obtained. This revised version was published online in June 2006 with corrections to the Cover Date.     

Investigation of the effect of the measurement with the abrupt noise and the number of approximated terms in conductional boundary estimation problem

A direct error vector analysis of inverse heat conduction problem is presented to detect the measured noise. Based on the reverse matrix approach that the inverse problem is solved directly in a linear domain, and the error vector is formulated from the difference between the measured temperature and the estimated temperature. There is no prior knowledge on the exact solution while the error vector is constructed. The error vector is used to investigate the consistence of the measured data in the domain and lead to detect the noise data. Furthermore, the proper number of the undetermined variable is able to suggest based on the mean value of the error vector and the value of the condition number of the reverse matrix. In the first example, a test problem with the measurement noise is presented. The estimated result is influent by the noise globally. The result shows that the value of error vector is changed significantly at the coordinate of the measurement noise appeared. In other words, the error vector analysis is able to identify the noise data. In the second example, the proper number of series expansion terms is investigated. From the result, it shows that the number of expansion terms with the small mean value and condition number can better approximate to the unknown condition. It means that the proposed method is able to suggest a proper number of expansion terms when the function of the recovered boundary is unknown.     

MULTIDIMENSIONAL GOURSAT PROBLEM FOR SEMILINEAR HYPERBOLIC EQUATIONS

In this paper we study the Goursat problem for semilinear hyperbolicequations with zero boundary condition where the boundary is the characteristic conefor hyperbolic operator. Our result shows that the solution is Lipschitz and is smoothaway from the characteristic cone.