A new generalized Weibull distribution in income economic inequality curves

Researchers have been developing various extensions and modified forms of the Weibull distribution to enhance its capability for modeling and fitting different data sets. In this note, we investigate the potential usefulness of the new modification to the standard Weibull distribution called odd Weibull distribution in income economic inequality studies. Some mathematical and statistical properties of this model are proposed. We obtain explicit expressions for the first incomplete moment, quantile function, Lorenz and Zenga curves and related inequality indices. In addition to the well-known stochastic order based on Lorenz curve, the stochastic order based on Zenga curve is considered. Since the new generalized Weibull distribution seems to be suitable to model wealth, financial, actuarial and especially income distributions, these findings are fundamental in the understanding of how parameter values are related to inequality. Also, the estimation of parameters by maximum likelihood and moment methods is discussed. Finally, this distribution has been fitted to United States and Austrian income data sets and has been found to fit remarkably well in compare with the other widely used income models.     

《老子》韵读研究

本文分三大部分：一、依王力古韵三十部，将《老子》各章所有入韵之字表而谱之；二、自用韵之部居、韵在句中之位置、韵在章中之位置、用韵之数量、用韵比配之形式等角度，归纳出《老子》用韵40例；三、古今诸家对《老子》韵读之研究，多有失误所在。究其失误之由，则主要在于对《老子》韵例之特殊性及《老子》以古谐声入韵之特殊性认识不足。特略考数例，以明一般。     

英汉基本句类主位结构对比及翻译

从语篇分析的角度,运用系统功能语法理论,通过对英汉基本句类的主述位结构的对比分析,探讨如何在翻译中处理主述位错位现象的问题。     

陕西县域经济发展战略模式研究

陕西和东部地区的经济发展差距主要是县域经济落后,因此,结合陕西各地的资源禀赋和经济发展水平,依据县域经济发展战略模式的一般理论,陕西各县域应分别选择城郊型、平原型、资源型和山区型四种不同的县域经济发展战略模式。     

告别平均与追求公平——转型期不公平心理的变迁及原因分析

改革开放 2 0多年来 ,不公平心理始终是社会心理失衡反应的一个突出方面。伴随不同时期改革在内容、领域方面的不同 ,以及由此引发的社会各群体利益格局的变化 ,不公平心理反映在指向和强度上又呈现出明显的阶段性特点。不公平心理的指向反映了公众对改革内容、进程的要求和愿望 ,其强度则决定了社会为政府留置的改革心理空间的大小。     

增长曲线模型非齐次线性估计的可容许性

讨论增长曲线模型Y =X1BX2 +ε中回归矩阵B的函数C1BC2 的估计L1YL2 +A ,在矩阵损失 (LT2 L1)Y +A - (ST2 XT2 S1X1)B (LT2 L1)Y +A - (ST2 XT2 S1X1)B T 下 ,我们得到了非齐次线性估计L1YL2 +A在非齐次线性估计类Г ={L1YL2 +A|L1:t×p ,L2 ;n×n ,A :t×s均为已知实阵 }中可容许的充要条件 :L1YL2在Г0 ={L1YL2 |L1:t×p ,L2 :n×s均为已知实阵 }中容许且当LT2 XT2 L1X1=ST2 XT2 S1X1时有A =0。     

谈汉语诗词中的叠词英译

叠词是汉语的一种修辞格,能带来特殊的语言表达效果。叠词形式多样、功能不一,在传达情感、强调意义和创造意境等方面颇具功效,其使用可促进语言形式和内容达到艺术统一。在结构工整严谨、对字词精炼传神、美学效果要求较高的汉语古诗词中,叠词起着不可忽视的作用。聚焦汉语古诗词中叠词的常见类型、特殊功能,关注其英译的策略原则是必要的。     

中日菜名音节构造模式差异之比较研究

中式菜肴的命名在音节方面具有一些特征,并有一定的规律可循,日式菜肴的命名同样如此。中日菜名在音节构造模式上有各自的特点和规律。     

Assessing accuracy of a continuous screening test in the presence of verification bias

Summary.  In studies to assess the accuracy of a screening test, often definitive disease assessment is too invasive or expensive to be ascertained on all the study subjects. Although it may be more ethical or cost effective to ascertain the true disease status with a higher rate in study subjects where the screening test or additional information is suggestive of disease, estimates of accuracy can be biased in a study with such a design. This bias is known as verification bias. Verification bias correction methods that accommodate screening tests with binary or ordinal responses have been developed; however, no verification bias correction methods exist for tests with continuous results. We propose and compare imputation and reweighting bias-corrected estimators of true and false positive rates, receiver operating characteristic curves and area under the receiver operating characteristic curve for continuous tests. Distribution theory and simulation studies are used to compare the proposed estimators with respect to bias, relative efficiency and robustness to model misspecification. The bias correction estimators proposed are applied to data from a study of screening tests for neonatal hearing loss.     

一次计数抽样检验的风险分析

利用抽样检验特征曲线 ,分析了一次计数抽样检验中N ,n ,Ac3个参数的改变对生产者风险和消费者风险的影响