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     

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。     

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。     

介绍一种多因素优选方法——单纯形调优方法

自从优选法在我国群众性推广以来,不少同志希望更多的介绍一些多因素优选方法.本着“洋为中用”的精神,介绍一种目前国外较为流行的一个方法——单纯形调优方法.这个方法用比较少的试验次数,逐步地找到最优条件.尤其在因素个数增多时,试验次数并不因此迅速增多,此外对试验结果有些误差的情况也能适应.所以这个方法使用     

配比试验在灰铸铁熔铸渗硼中的应用

本文用配比试验法研究了灰铸铁在铸型中进行碳化硼涂料渗硼工艺，证明了渗硼层有高的耐锌液腐蚀性能．因此，带有渗硼层的灰铸铁锌锅使用寿命长，可取得显著的经济效益．     

巧用构造法解三角问题

解某些三角问题时，常规的思考方法是由条件到结论的定向思考．但有些问题按照这样的思维方式来寻求解题的途径比较困难，甚至无从下手．在这种情况下，经常要求我们改变思维方向，换一个角度思考，以找到一条绕过障碍的新的途径．     

矩阵分裂序列与线性二级迭代法

本文讨论线性非定常二级迭代法的收敛性．对于一般的基于矩阵分裂序列的迭代法,针对分裂序列本身找到了一种新的且相对较弱的收敛性条件,并因此得到了由非定常二级迭代法推广而来的广义二级迭代法的收敛结果．从而,用一种新的方法证明了非定常二级迭代法的收敛性．     

调优操作方法介绍

本刊１９８３年第五、六两期连载了“提高工业生产率的实用方法”一文。其中介绍的调优操作（ＥＶＯＰ）引起了不少读者的兴趣．该法的主要优点是，在不需专门试验费用的条件下，不冒风险地在生产中逐步改进生产工艺条件，从而提高生产率．为了满足读者进一步了解这种方法的需要，本期刊登了此文．本文用一个双因素调优操作的实例详细地介绍了运用调优操作的全过程．对于想把这种方法应用到生产实践中的同志有一定借鉴价值．     

数学解题中的添加技巧

众所周知，解决平几问题时，常作辅助线（图），这能沟通条件与结论的内在联系，找到解题思路．拓展这一解题思想，便得到了有着一定理论意义的解题方法--添加的思维方法，它是一种应用广泛的解题策略．下面举例说明其巧妙应用．1添加顺序涉及有关多个自变量的数学问题，头绪纷繁，难以入手．这时，不妨给其添加某种顺序，则变量就有了大小之别，从最大、最小者去考虑，往往能找到解题的突破口．例1设xi∈EN（i=1，2，...，5），且x1＋x2＋...＋x5＝x1x2...x5，求x5的最大值．分析因为x1，x2，...，x5在条件中处于同等地位，不妨添加顺序，…     

用正交试验法解决注射液中的玻璃物问题

本文用正交法做了提高某注射液合格率的试验，又做了重复性的试验及第二批验证性试验。接着，用单因素试验的方差分析法进行分析，找到了改进质量的措施，投产后获得成功     

Flexible incomplete Cholesky factorization with multi‐parameters to control the number of nonzero elements in preconditioners

An incomplete Cholesky (IC) factorization with multi‐parameters is presented. The marked virtue of the proposed IC factorization algorithm is to dynamically control the number of nonzero elements in each column of the IC factorization preconditioner L with the help of these involved parameters. Parameter setting strategies are also given. Numerical results show that the total computing time for both computation of the preconditioner L and iterative solution is evidently reduced for almost all test matrices. In general, these parameters can obviously enhance the effectiveness and performance of the IC factorization. Copyright © 2011 John Wiley & Sons, Ltd.     

联合检测过程位置参数和尺度参数的非参数Cusum控制图

用于检测生产过程的多数传统控制图都假定过程的受控分布是已知的,并假定数据服从正态分布。然而在很多情况下,由于没有足够的数据来估计过程的分布,这种假定就变得不现实,而非参数控制图却不需要任何关于分布的特殊形式的假定。另外,多数的已有控制图都是使用两个单独的均值与方差控制图来同时检测生产过程.本文中,我们提出一个新的基于Cramer-von-Mises(CvM)检验的非参数累积和控制图(称为CvM图)来同时检测过程位置参数和尺度参数。文中给出了基于不同受控平均运行长度(ARL)下的CvM图的控制限,通过步长的均值、方差及分位数来研究控制图的性能表现。最后用一个实例来说明CvM图的实际应用。     

A Bayesian approach to modeling lost person behaviors based on terrain features in Wilderness Search and Rescue

In Wilderness Search and Rescue (WiSAR), the incident commander (IC) creates a probability distribution map of the likely location of the missing person. This map is important because it guides the IC in allocating search resources and coordinating efforts, but it often depends almost exclusively on the missing person profile, prior experience, and subjective judgment. We propose a Bayesian model that uses publicly available terrain features data to help model lost-person behaviors. This approach enables domain experts to encode uncertainty in their prior estimations and also makes it possible to incorporate human behavior data collected in the form of posterior distributions, which are used to build a first-order Markov transition matrix for generating a temporal, posterior predictive probability distribution map. The map can work as a base to be augmented by search and rescue workers to incorporate additional information. Using a Bayesian χ ² test for goodness-of-fit, we show that the model fits a synthetic dataset well. This model also serves as a foundation for a larger framework that allows for easy expansion to incorporate additional factors such as season and weather conditions that affect the lost-person’s behaviors.     

改进的自回归过程结构变点检验

In this paper, we consider the problem of detecting for structural changes in the autoregressive processes including AR（p） process. In performing a test, we employ the conventional residual CUSUM of squares test （RCUSQ） statistic. The RCUSQ test is based on the subsampling method introduced by Jach and Kokoszka [J. Methodology and Computing in Applied Probability 25（2004）]. It is shown that under regularity conditions, the asymptotic distribution of the test statistic is the function of a standard Brownian bridge. Simulation results as to AR（1） process and an example of real data analysis are provided for illustration.     

Ⅰ型拉伸试样金属注射成形多相流动的三维数值模拟

将粉末注射成形充模过程视为粘结剂、粉末和空气的三相流动过程,基于多相流理论给出金属注射成形的多相流动控制方程。根据金属注射成形的工艺特点确定多相流动控制方程的初边界条件,用多相流数值分析软件CFX对Ⅰ型拉伸试样的铁粉注射成形充模流动过程实现了三维数值模拟,分析了模腔中不同位置处粘结剂一粉末流动的速度曲线。数值模拟结果表明在Ⅰ型拉伸试样金属注射成形充模流动过程中发生过两相分离的现象,数值模拟的瞬态信息可用于金属注射成形产品缺陷的分析与控制。     

Limiting measure and stationarity of solutions to stochastic evolution equations with Volterra noise

Large-time behavior of solutions to stochastic evolution equations driven by two-sided regular cylindrical Volterra processes is studied. The solution is understood in the mild sense and takes values in a separable Hilbert space. Sufficient conditions for the existence of a limiting measure and strict stationarity of the solution process are found and an example for which these conditions are also necessary is provided. The results are further applied to the heat equation perturbed by the two-sided Rosenblatt process.     

A tabu search heuristic procedure for the capacitated facility location problem

A tabu search heuristic procedure is developed, implemented and computationally tested for the capacitated facility location problem. The procedure uses different memory structures. Visited solutions are stored in a primogenitary linked quad tree. For each facility, the recent move at which the facility changed its status and the frequency it has been open are also stored. These memory structures are used to guide the main search process as well as the diversification and intensification processes. Lower bounds on the decreases of total cost are used to measure the attractiveness of the moves and to select moves in the search process. A specialized network algorithm is developed to exploit the problem structure in solving transportation problems. Criterion altering, solution reconciling and path relinking are used to perform intensification functions. The performance of the procedure is tested through computational experiments using test problems from the literature and new test problems randomly generated. It found optimal solutions for almost all test problems from the literature. As compared to the heuristic method of Lagrangean relaxation with improved subgradient scheme, the tabu search heuristic procedure found much better solutions using much less CPU time.     

A model of the direct interaction of elements of a tightly coupled system

A maximin mathematical model describing the process of changing the quality indicators of products manufactured by facilities of a complex production system interconnected by multiple feedbacks is considered. Necessary and sufficient conditions for the monotone growth of these indicators are found. For the proposed new technologies utilized on some of these facilities, consistency conditions with the technologies used on other facilities are determined. For finding the optimal control of this process, it is recommended to use parallel computations.