英语新闻标题信息有效性解析

标题被视为新闻报道的窗口,标题信息的有效性直接影响读者获取信息的数量和质量。对标题信息有效性的研究有助于新闻标题的设计,也能够为读者浏览新闻提供一些指导意见。笔者从用词数量,语法特点和词汇选用3个方面对英语新闻标题信息的有效性进行了对比分析。数据统计分析结果表明具有较高信息有效性的标题通常由7±2个词组成,采用主动语态的简单句,精选简短的小词和生动活泼的习语,运用恰到好处的修辞手法。     

自然数幂方和的一个巧妙猜想

文章将利用已知的几种特殊的自然数的幂方和,研究其算法特征,进而给出并证明了自然数幂方和的一个巧妙猜想,希望这一猜想能给自然数的幂方求和寻求更简单的方法提供一些新思路.     

英汉语言中数字模糊用法的文化因素分析

与一般的模糊语言用法相比,数字的模糊用法颇为微妙,更为复杂,需要从文化范畴,从语用角度来分析,理解,解释。本文从以下三个方面进行探讨:一、由于历史沿袭,某些数字被赋予了特定的、或是吉祥的、或是禁忌的意义,可以追溯到原始的自然崇拜或者宗教信仰;二、数字含义由具体意义演变为泛指意义,已经失去精确地数量含义;三、文学作品中倏格用以达到修辞效果。分析了数字模糊用法的文化因素,追溯其沿袭过程,并分析其具体用法和效果,以达到正确地理解和翻译目的。     

Strong laws of large numbers for dependent heterogeneous processes: a synthesis of recent and new results

This paper surveys recent developments in the strong law of large numbers for dependent heterogeneous processes. We prove a generalised version of a recent strong law for Lz-mixingales, and also a new strong law for Lpmixingales. These results greatly relax the dependence and heterogeneity conditions relative to those currently cited, and introduce explicit trade-offs between dependence and heterogeneity. The results are applied to proving strong laws for near-epoch dependent functions of mixing processes. We contrast several methods for obtaining these results, including mapping directly to the mixingale properties, and applying a truncation argument.     

堆垒级数部分和的一般公式

利用阶乘幂差分的重要性质,得到堆垒级数部分和的一般公式.     

Simulation of the p-generalized Gaussian distribution

In this paper, we introduce the p-generalized polar methods for the simulation of the p-generalized Gaussian distribution. On the basis of geometric measure representations, the well-known Box–Muller method and the Marsaglia–Bray rejecting polar method for the simulation of the Gaussian distribution are generalized to simulate the p-generalized Gaussian distribution, which fits much more flexibly to data than the Gaussian distribution and has already been applied in various fields of modern sciences. To prove the correctness of the p-generalized polar methods, we give stochastic representations, and to demonstrate their adequacy, we perform a comparison of six simulation techniques w.r.t. the goodness of fit and the complexity. The competing methods include adapted general methods and another special method. Furthermore, we prove stochastic representations for all the adapted methods.     

On rates of convergence to infinitely divisible laws for dependent random variables

Large O and small o approximations of the expected value of a class of functions (modified K-functional and Lipschitz class) of the normalized partial sums of dependent random variables by the expectation of the corresponding functions of infinitely divisible random variables have been established. As a special case, we have obtained rates of convergence to the Stable Limit Laws and to the Weak Laws of Large Numbers. The technique used is the conditional version of the operator method of Trotter and the Taylor expansion.     

The True Cost-of-Living Index With Changing Preferences

This article investigates the theoretical and empirical properties of a true cost-of-living index under conditions of changing preferences. A family of true indexes is defined based on the notion of the current utility function. A particular index, based on the previous period's utility level, is then defined. Given this definition, a true cost-of-living index is computed based on a quadratic expenditure system estimated with quarterly data from 1960–1981. For empirical purposes, changes in preferences are represented by the linear habit formation hypothesis. This index is then compared with Paasche and Laspeyres indexes. The true cost-of-living index grows somewhat faster than either the Paasche or Laspeyres index. It also displays considerably more variability.     

单片微机MCS-51实时测量系统中一批数据的一种数字滤波方法

提出了一种在单片微机实时测量系统中对成批数据进行二次算术平均数字滤波的一种方法，具有节省内存、编程简洁、运行较快的特点，滤波系数ｎ，ｍ和采样间隔ＴＳ通过键盘设置，是对在一定范围内波动变化的参量进行预处理的一种较好方法