中国农民工问题的思路选择

农民工是合乎中国国情、极富有中国特色的当代中国社会转型期出现的新概念，它代表着当今中国改革开放中涌现的一个庞大的新兴社会群体。农民工的存在与发展，影响党的事业和国家的稳定、现代化进程和社会经济发展。马克思主义的动力思维、辩证思维、规律思维，应成为我们研究农民工问题的逻辑起点、思维方式和思维趋向。     

论基因时代知识产权的法理革命

生物技术的飞速发展使人类进入到一个全新的时代———基因时代,与基因有关的知识产权保护问题凸显出来。为此,有必要确立新的知识产权保护体系,即从知识产权的主体、客体、性质、立法思路等方面推进这场知识产权的法理革命。     

STAR非线性平稳性检验中误设定的伪检验研究

本文通过理论分析和蒙特卡洛仿真模拟,研究平稳性检验中选用的统计量与数据生成过程不一致时,非线性ESTAR、LSTAR与线性DF检验法能否得出正确的结论.研究表明,二阶LSTAR与ESTAR模型可用相同的检验方法,但前者的非线性特征更强.当数据生成过程为线性AR,或非线性ESTAR、二阶LSTAR模型时,使用DF或ESTAR检验法可得出大致正确的结论,但LSTAR检验法完全失败.数据生成过程的非线性特征越强,ESTAR较DF检验方法的功效增益越高;线性特征越强,DF的功效增益越高.当转移函数F(θ,c,zt)中θ较大导致一阶泰勒近似误差较大或c非0时,标准ESTAR与LSTAR非线性检验法失去应用条件.θ较大或c偏离0较远时,数据生成过程中线性成分增强,用线性DF检验可获得更好的检验结果.     

Infinite Variation Tempered Stable Ornstein–Uhlenbeck Processes with Discrete Observations

We investigate transition law between consecutive observations of Ornstein–Uhlenbeck processes of infinite variation with tempered stable stationary distribution. Thanks to the Markov autoregressive structure, the transition law can be written in the exact sense as a convolution of three random components; a compound Poisson distribution and two independent tempered stable distributions, one with stability index in (0, 1) and the other with index in (1, 2). We discuss simulation techniques for those three random elements. With the exact transition law and proposed simulation techniques, sample paths simulation proves significantly more efficient, relative to the known approximative technique based on infinite shot noise series representation of tempered stable Lévy processes.     

High-order extensions of the Double Chain Markov Model

The Double Chain Markov Model is a fully Markovian model for the representation of time-series in random environments. In this article, we show that it can handle transitions of high-order between both a set of observations and a set of hidden states. In order to reduce the number of parameters, each transition matrix can be replaced by a Mixture Transition Distribution model. We provide a complete derivation of the algorithms needed to compute the model. Three applications, the analysis of a sequence of DNA, the song of the wood pewee, and the behavior of young monkeys show that this model is of great interest for the representation of data that can be decomposed into a finite set of patterns.     

试析新时代航天强国思想

建成航天强国作为实现社会主义现代化强国的目标之一,一方面对于实现党的奋斗目标具有重要支撑意义,另一方面是在新时代下以马克思主义为指导发展航天事业的必然产物。十八大以来,习近平总书记站在时代前沿,在国内外诸多场合发表了关于建设航天强国的重要讲话,形成了新时代航天强国思想,该思想虽然还在不断延伸中,但已形成基本脉络。以航天科技进步是核心、航天精神弘扬是关键、航天事业发展是目标为主要内容的习近平新时代航天强国思想具有鲜明的时代特征:自主性、跨越性以及共享性,该思想在新时代具有重要的理论价值和实践意义。     

从《新结婚时代》看当代中国家庭伦理观的冲突与变迁

改革开放以来,随着传统社会向现代社会转型,中国的家庭伦理观发生了巨大的变化。家庭伦理电视剧《新结婚时代》真实描绘了现代社会中＂城乡结合＂家庭的矛盾,集中展现了现代化进程中家庭伦理观念的冲突与变迁。主要表现为：从家族利益至上到个人自主决定,婚姻越来越成为＂两个人的事＂;从绝对服从的孝,到平等尊重的爱老之情,亲子关系出现民主平等化的趋势;从夫权统治到夫妻平权,夫妻关系日趋平等,相互尊重的要求日益凸显。     

从地理决定论到结构主义:地缘政治研究方法的变迁

地缘政治学以人与环境之间的关系为分析基础,为人类重新认识自然环境提供了崭新的视角。随着全球化的发展、科学技术的进步、全球信息社会的初步形成,结构主义取代地理决定论将成为地缘政治研究的主要方法。     

“二十四贤”与“汉魏革命”

十卷本《陶潜集·四八目》所载的魏文帝于汉魏禅代之际彰表"二十四贤"之事,可以认为源自确切的汉末魏晋史料,具有重要的史料价值。"二十四贤"的人选构成来自于东汉后期的"清流"士人群体,既包括了积极参与反外戚、反宦官政治活动的官僚士人,也包括了以隐居不仕表达消极反抗之意的民间处士。曹丕在代汉建魏前夕彰表如是面貌的"二十四贤",显示了曹魏王朝君臣以汉末清流的继承者自居的政治立场,也是着眼于重构王朝秩序的"汉魏革命"的组成部分。     

Foreign-born health integration during the transition to adulthood: The case of weight

Nativity differences in youths’ health in the United States are striking—the children of foreign-born parents often have healthier outcomes than those of native-born parents. However, very little is known about how immigrant-native differences evolve within the same individuals over time, or about life cycle aspects of the health-related integration of youth with migration backgrounds. Using data from the National Longitudinal Study of Adolescent Health, I examine nativity differences in trajectories of weight gain during adolescence and early adulthood, as well as the degree to which temporal patterns are stratified by race/ethnicity and socioeconomic status. I examine whether nativity differences converge, diverge or remain stable over time, and whether patterns are socially stratified within and across nativity groups. I find that first-generation adolescents begin at a lower weight than their third generation peers and gain weight at a significantly slower pace, resulting in meaningful differences by early adulthood. More complex examination of the relationship between nativity and weight gain reveals additional differences by ethnicity: the foreign-born advantage over time does not extend as strongly to Hispanic adolescents. The findings demonstrate how the health-related integration of foreign-born youth is tied to race/ethnicity and socioeconomic circumstances, and suggest the need to examine the ways in which social circumstances and health change together.