关于电阻测量几种方法的讨论

本文对电阻的测量方法及误差修正进行了比较和分析，并给出合理、直观、简捷的实验测试手段。     

汉语"NP+(VN+AP)"句式中"VN"的句法语用特点考察

主要通过与谓语位置上的述宾结构的比较,考察了“NP (VN AP)”句式中小主语位置上述宾结构“VN”的非时间性、非述谓性、无界性、指称性、话题性、非信息焦点性等句法语用方面的特点。     

古人对语法的动态性认识——汉魏晋注释书对名词的句法语义解析

据汉魏晋注释书对名词句法语义的解析,说明古人对语法的动态性有所认识;文章的材料与分析是对作者《中国古代语法学探究》一书中这个问题论述的补充;再次说明现代语法学理论建设,要重视继承古人的分析实践。     

M-Estimates of regression when the scale is unknown and the error distribution is possibly asymmetric: A minimax result

Huber (1964) found the minimax-variance M-estimate of location under the assumption that the scale parameter is known; Li and Zamar (1991) extended this result to the case when the scale is unknown. We consider the robust estimation of the regression coefficients (β₁,…,β_p) when the scale and the intercept parameters are unknown. The minimax-variance estimates of (β₁,…,β_p) with respect to the trace of their asymptotic covariance matrix are derived. The maximum is taken over ?-contamination neighbourhoods of a central regression model with Gaussian errors (asymmetric contamination is allowed), and the minimum is taken over a large class of generalized M-estimates of regression of the Mallow type. The optimal choice of estimates for the nuisance parameters (scale and intercept) is also considered.     

ST公司预警误判与会计信息质量关系的经验研究

本文以ST公司预警的相关判别模型为基础,经验地揭示了会计报表信息质量对ST公司预警误判的影响。研究表明:我国ST公司预警误判的原因在很大程度上与会计报表信息质量有关。为此,本文建议加快具体会计准则颁布和实施步伐,不断强化审计责任和监管部门的责任,提高会计信息质量。     

公示语翻译错误之分析——以金华地区广告、标识和招牌英语使用错误为例

本文从金华市公示语,包括广告、标识和招牌等英语使用调查入手,分析了公示语翻译错误的类型,以及产生这些翻译错误的原因。最后从实际出发提出了两点结论和四条如何改进这些翻译错误的建议。     

Learning from the Piper Alpha Accident: A Postmortem Analysis of Technical and Organizational Factors

The accident that occurred on board the offshore platform Piper Alpha in July 1988 killed 167 people and cost billions of dollars in property damage. It was caused by a massive fire, which was not the result of an unpredictable "act of God" but of an accumulation of errors and questionable decisions. Most of them were rooted in the organization, its structure, procedures, and culture. This paper analyzes the accident scenario using the risk analysis framework, determines which human decision and actions influenced the occurrence of the basic events, and then identifies the organizational roots of these decisions and actions. These organizational factors are generalizable to other industries and engineering systems. They include flaws in the design guidelines and design practices (e.g., tight physical couplings or insufficient redundancies), misguided priorities in the management of the tradeoff between productivity and safety, mistakes in the management of the personnel on board, and errors of judgment in the process by which financial pressures are applied on the production sector (i.e., the oil companies' definition of profit centers) resulting in deficiencies in inspection and maintenance operations. This analytical approach allows identification of risk management measures that go beyond the purely technical (e.g., add redundancies to a safety system) and also include improvements of management practices.     

M-Estimators of Scale with Minimum Gross Errors Sensitivity

The median absolute deviation (MAD) is known to be the M-estimator of scale with minimum gross errors sensitivity (GES) when the error distribution is known to be symmetric and strongly unimodal. The problem considered here is to find the Fisher consistent M-estimator with minimum GES when the error distribution is symmetric but not necessarily unimodal. Under some general conditions, the score function χ corresponding to the minimizing M-estimator has the form χ(x) = ?1 when |x| < a; χ(x) = c when a < |x| < b; χ(x) = 1 when |x| > b. An example is given in which the M-estimator with minimum GES does not correspond to the MAD.     

Consistent Estimation of the Regression Coefficient Through Weighted Arithmetic Mean of the Inconsistent Estimators in Replicated Ultrastructural Model

The problem of consistent estimation of the slope parameter in an ultrastructural model with replicated observations is considered in this article. A consistent estimator based on a weighted arithmetic mean of two inconsistent least squares estimators is proposed which is independent of any unknown quantity. The efficiency properties of this estimator are studied.     

The non parametric regression estimate with dependent measurement errors

ABSTRACT

Non parametric regression estimation with measurement errors data has received great attention, and deconvolution local polynomial estimators can be used to deal with the problem that the errors are independent of other variables in the literature. In this article, the copula method is applied to tackle the case that the errors may depend on covariates, and the asymptotic properties of the resulting estimators are derived. Two simulations are conducted to illustrate the performance of the proposed estimators.