电子在电环轴上的非线性振动

研究电子在电环轴上的非线性振动，在建立电子的运动方程后利用椭圆积分求得自由振动的准确解及周期，讨论和图示其非线性振动特征。截断级数展式导致杜芬方程，解和周期近似表达式由杜芬振动和简谐振动给出，且与准确表达式比较。指出了非线性振动解在工程上的实用意义     

环境保护与世界性的环境正义

现代性发展带来了全球性的环境问题。面对全球性的环境问题,发达国家或地区的人们认为环境问题主要是由于发展中国家或地区急剧膨胀的人口增长所导致的,他们对环境问题具有不可推卸的主要责任。与此相对,发展中国家或地区的人们认为环境问题在根本上是源于以发达国家或地区为首设置的不平等社会制度或结构问题所导致的。然而,归责并不能解决问题,面对全球性的环境问题,提出解决问题的实际方案才是第一要务。我们有理由相信,基于对发达国家或地区和发达中国家或地区的两种不同视角的分析,当我们把人类整体的繁荣昌盛作为思考问题的起点时,一种能力方法理论可以支持我们提出一种多维度、多层次的全球性环境正义理论。     

流动人口的自营性收入不平等与工资性收入不平等

利用2005年全国1％人口抽样调查的子样本数据以及2012年流动人口动态监测调查数据,研究了各可观测因素对自营者和受雇者收入分布的解释能力存在何种差异,及其在2005-2012年间所发生的变化.考虑到就业方式选择的内生性问题,文章首先采用转换回归模型对自营者和受雇者的收入方程进行了估计.在此基础上,进一步根据基于回归分析的分解分析方法,利用Shapley分解过程对自营者收入的Gini系数和受雇者收入的Gini系数分别进行了分解分析.结果显示,对于流动人口而言,收入分配过程中的制度性障碍正在减少.     

Approximating moments of continuous functions of random variables using Bernstein polynomials

Bernstein polynomials have many interesting properties. In statistics, they were mainly used to estimate density functions and regression relationships. The main objective of this paper is to promote further use of Bernstein polynomials in statistics. This includes (1) providing a high-level approximation of the moments of a continuous function $g\left(X\right)$ of a random variable $X$, and (2) proving Jensen’s inequality concerning a convex function without requiring second differentiability of the function. The approximation in (1) is demonstrated to be quite superior to the delta method, which is used to approximate the variance of $g\left(X\right)$ with the added assumption of differentiability of the function. Two numerical examples are given to illustrate the application of the proposed methodology in (1).     

‘Leave no one behind’ and the challenge of intersectionality: Christian Aid's experience of working with single and Dalit women in India

The principle of ‘leaving no one behind’ is strongly emerging as a defining aspect of the new development framework under negotiation in 2015. This stems from an acknowledgement of the failure of the Millennium Development Goals in securing benefits for the most marginalised groups, those suffering from economic deprivation and discrimination as a result of intersecting inequalities. As the new development framework takes shape, national-level experiences of tackling intersecting inequalities can provide lessons on the shifts required in policy and practice to address the specific needs of women experiencing deprivation, violence, and discrimination because of their gender and other identities. This case study illustrates lessons learnt from Christian Aid's programmatic experience in several states of India in support of Dalit women and single women as they individually and collectively struggle to gain dignity and realise their rights.     

Gender,poverty, and inequality: a brief history of feminist contributions in the field of international development

This paper provides a brief history of feminist contributions to the analysis of gender, poverty, and inequality in the field of international development. It draws out the continuous threads running through these contributions over the years, as the focus has moved from micro-level analysis to a concern with macro-level forces. It concludes with a brief note on some of the confusions and conflations that continue to bedevil attempts to explore the relationship between gender, poverty, and inequality.     

矢量法在数学求解问题中的应用

矢量代数是数学中最活跃的分支之一,矢量深刻的描述了现实世界的空间形式,是沟通数与形内在联系的有力工具,因而利用矢量的运算解决数学问题具有很强的优越性。     

收入分配不平等的概念及其度量综述

收入分配是经济学研究的重要领域之一。收入分配的不平等状况可以有实证和规范两种方法分析。实证方法描述收入分配中分散程度的实际模式,并用一种统计量(值)来概括。实证方法除了常见的频数图、洛伦兹曲线和泰尔指数外,还有著名的帕雷托分布和对数正态分布。规范法建立在一种价值判断之上,用社会福利函数度量不平等的程度。阿特金森指数(AtkinsomIndex)是最常用的由规范法导出的不平等指标。     

Estimating the Prevalence of Illegal Drug Use

A generic globally applicable integral equation allows the estimation of hidden drug use. Formulas for estimating the prevalence of drug use are provided for both the assumed and known latency period. Estimates of prevalence of opiate use in Ireland ranging from 7,955 [5,789, 10,122] to 11,986 [8,792, 15,181] with prevalence rates ranging from 2.7 [2.0, 3.5] per 1,000 to 4.1 [3.0, 5.2] were obtained. The model can be implemented by service providers and planners if numbers of first treatments for drug use and the latency period are known or assumed.     

生命周期视角下与收入相关的健康不平等分析——基于组群分析的方法

本文利用中国健康与营养调查数据,从生命周期的视角对与收入相关的健康不平等的年龄特征和变动进行了基于组群分析的实证研究。研究结果表明：与收入相关的健康不平等随着年龄的增长不断扩大：不同年龄段的健康不平等均呈现不断扩大的变动趋势,45岁以上人群的变动幅度要相对大于45岁以下人群;教育、收入和医疗的不平等是与收入相关的健康不平等扩大的主要原因,但是对45岁以下人群健康不平等的影响要大于45岁以上人群;此外,本文还进一步分析了年龄老化对健康不平等变化的影响路径。