化工过程仿真系统模型库的建立

论述了面向对象仿真理论与化工过程系统的具体实践相结合 ,借助于面向对象的仿真程序设计语言C/C + + ,建立过程系统中各个单元环节的数学模型 ,提出模型库实施方法。论述了化工过程系统数学模型库的建立方法     

The weighted sequential likelihood ratio

Strong approximation of the maximum-likelihood-ratio statistic by a diffusion process is given. This allows one to develop statistics using different weight functions. Sequential tests obtained include the ones earlier defined by Barbour (1979). The precision of the approximations is examined.     

Linear statistics in change-point estimation and their asymptotic behaviour

ABSTRACT The limiting behaviour of Bayes procedures in the asymptotic setting of the change-point estimation problem is studied. It is shown that the distribution of the difference between the Bayes estimator and the parameter converges to the distribution of a fairly complicated random variable. A class of linear statistics is introduced, and the form of the Bayes estimator within this class is deduced. The asymptotic properties of this linear estimator are investigated in two different settings for the prior distribution.     

Generalized linear models with functional predictors

Summary. We present a technique for extending generalized linear models to the situation where some of the predictor variables are observations from a curve or function. The technique is particularly useful when only fragments of each curve have been observed. We demonstrate, on both simulated and real data sets, how this approach can be used to perform linear, logistic and censored regression with functional predictors. In addition, we show how functional principal components can be used to gain insight into the relationship between the response and functional predictors. Finally, we extend the methodology to apply generalized linear models and principal components to standard missing data problems.     

Testing the Goodness of Fit of Parametric Regression Models with Random Toeplitz Forms

ABSTRACT: We introduce a class of Toeplitz‐band matrices for simple goodness of fit tests for parametric regression models. For a given length r of the band matrix the asymptotic optimal solution is derived. Asymptotic normality of the corresponding test statistic is established under a fixed and random design assumption as well as for linear and non‐linear models, respectively. This allows testing at any parametric assumption as well as the computation of confidence intervals for a quadratic measure of discrepancy between the parametric model and the true signal g;. Furthermore, the connection between testing the parametric goodness of fit and estimating the error variance is highlighted. As a by‐product we obtain a much simpler proof of a result of 34 ) concerning the optimality of an estimator for the variance. Our results unify and generalize recent results by 9 ) and 15 , 16 ) in several directions. Extensions to multivariate predictors and unbounded signals are discussed. A simulation study shows that a simple jacknife correction of the proposed test statistics leads to reasonable finite sample approximations.     

Bayes model averaging with selection of regressors

Summary. When a number of distinct models contend for use in prediction, the choice of a single model can offer rather unstable predictions. In regression, stochastic search variable selection with Bayesian model averaging offers a cure for this robustness issue but at the expense of requiring very many predictors. Here we look at Bayes model averaging incorporating variable selection for prediction. This offers similar mean-square errors of prediction but with a vastly reduced predictor space. This can greatly aid the interpretation of the model. It also reduces the cost if measured variables have costs. The development here uses decision theory in the context of the multivariate general linear model. In passing, this reduced predictor space Bayes model averaging is contrasted with single-model approximations. A fast algorithm for updating regressions in the Markov chain Monte Carlo searches for posterior inference is developed, allowing many more variables than observations to be contemplated. We discuss the merits of absolute rather than proportionate shrinkage in regression, especially when there are more variables than observations. The methodology is illustrated on a set of spectroscopic data used for measuring the amounts of different sugars in an aqueous solution.     

浅论学位论文的选题方法

学位论文是研究生在校期间的主要研究成果,论文的选题决定论文的研究方向和研究领域,选题的好坏直接决定着论文质量的高低。管理研究方法论是专业人员研究行为的规范体现,它不仅需要研究成果体现“其然”结果,更强调研究中的“所以然”过程。本文基于管理研究方法论的指导,从论文的选题过程和选题工作两个方面来规范学位论文选题,发掘出科学规范的论文选题方法。     

Once More With Feeling: Ethnographic Reflections on the Mediation of Tension in a Small Team of Call Centre Workers

This article explores the labour process of a team of call‐centre workers based in a multi‐client call centre in the West Midlands. Founded on the basis of a 13‐month ethnographic study into workplace resistance in call‐centre environments, this article provides insights into control in call centres, focusing on sexuality, internal team dynamics and discipline. It is argued that control is exerted through management and information technology but it is crucially exerted laterally in the team and sexuality is an important medium of such control. This article focuses specifically on how worker sexuality is deployed to regulate the tension between contradictory imperatives faced by workers. The article then considers the emotional content of the call‐centre labour process, arguing that the apparent resolution of potentially contradictory logic, in fact, depends upon the development by call‐centre workers, encouraged by more senior employees, of informal, pseudo‐sexualized client relations at the point of production. Crucially however the fieldwork reveals that the demands placed upon customer service representatives are subtly gendered.     

论新时期中国电影的民族化演进过程——以第三、四、五代导演为例

中国电影事业自新时期以来取得了辉煌的成就,不但涌现大量的佳片力作,而且还不断在世界电影舞台上获得声誉。这种良好态势的出现除了是因为我们吸收了世界电影的先进经验,更为重要的是由于这一时期电影在处理民族化问题方面上成就显著。因而,从民族化进程的角度并以新时期电影的主要制作者———第三、四、五代导演为例来探讨这一时期电影的得失就具有深刻的现实意义。     

话语线性结构问题的认知分析

语言编码中的语句组成不仅受到一定的语法规则和语义选择的制约,而且也影响话语信息的突显和解读,由此产生的话语线性结构问题受到了传统语法学家以及认知语言学家等的共同关注。二者的主要观点、原则和方法基本一致,侧重将语义作为语言研究的出发点和重点,认为应诉诸语义来描写语法,将语言解释为一种可进行语义选择的系统。但是从认知语言的角度对话语线性结构问题进行分析探讨,应强调对语句组成的研究不仅要从语法规则和语义选择方面考虑,更应从较为深层的结构,即认知的角度加以分析。