巴渝古崖居的空间分布与景观特征

巴渝古崖居的分布与地理、地质、交通等诸多因素有关，以成渝交通要道、长江干流和支流为线，串起沿途各个点，由线成面，呈现出渝西、渝东北两头集中、整体北多南少的分布特征。巴渝古崖居大多开凿于明清晚期，这一时期巴渝许多地区战乱频繁、匪患猖獗。古崖居的集中分布与这些地区相吻合，从侧面印证了巴渝古崖居的空间分布特征。巴渝古崖居的广泛开凿体现了古人高超的建筑艺术以及社会历史文化的变迁。     

Inference and optimal design of multiple constant-stress testing for generalized half-normal distribution under type-II progressive censoring

The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion.     

Assessing the market values of soccer players – a robust analysis of data from German 1. and 2. Bundesliga

The paper examines to what extent a player's market value depends on his skills. Therefore, a data set covering 28 performance measures and the market values of about 493 players from 1. and 2. German Bundesliga is analysed. Applying robust analysis techniques, we are able to robustly estimate market values of soccer players. The results show (1) that there are significantly underrated and overrated players and (2) that a player's affiliation to a certain team may contribute to his market value. We conclude that a club's reputation affects the market values of its players and that star players are in tendency overrated.     

Random effects regression mixtures for analyzing infant habituation

Random effects regression mixture models are a way to classify longitudinal data (or trajectories) having possibly varying lengths. The mixture structure of the traditional random effects regression mixture model arises through the distribution of the random regression coefficients, which is assumed to be a mixture of multivariate normals. An extension of this standard model is presented that accounts for various levels of heterogeneity among the trajectories, depending on their assumed error structure. A standard likelihood ratio test is presented for testing this error structure assumption. Full details of an expectation-conditional maximization algorithm for maximum likelihood estimation are also presented. This model is used to analyze data from an infant habituation experiment, where it is desirable to assess whether infants comprise different populations in terms of their habituation time.     

中国网上聊天室中英语语言特征

中国网上英语聊天室中的英语与英语国家聊天室中的英语相比较 ,在某些方面 ,如缩写的使用、句首字母少用大写、句尾少标点等有一些共同的特征。但由于受本族语的影响 ,中国人网上聊天的语言有其独到之处。中国人用英语聊天的目的主要是为了练习语言 ,使英语语言的交际功能减弱。受语言水平所限 ,中国聊天者的会话语言更接近书面语体 ,聊天的内容狭窄且缺乏连续性。网上聊天 ,作为一种新的语言交际方式 ,为英语学习者们提供了另一种学习途径 ,在练习快速英语思维及表达方面有着积极作用     

论金工实践课教学与全面素质教育

论述了金工实践课教学与全面素质教育的关系及金工实践课作为素质教育的主要特征。提出金工实习是高等工科院校实施素质教育的重要组成部分 ,并且有实践性、能动性、创造性和自主性的特征。     

反梯度推进:西部产业升级的一种思路

反梯度推进理论的核心内容强调 :落后地区要根据自己的实际情况 ,直接引进世界最先进的技术 ,发展自己的高新技术 ,带动传统产业实现超越发展。近几年 ,我国提出的西部大开发战略 ,其实质就是要解决中国区域经济的均衡协调发展问题 ,实现区域经济的跨越式发展。而实现结构优化和产业升级则是根本出路。在这方面 ,反梯度推进理论为我国西部大开发过程中的产业升级提供了非常重要的启示。     

深化对社会主义本质和特征的认识

社会主义本质不论从历史的角度 ,还是从实践的角度考察都是“解放生产力 ,发展生产力 ,消灭剥削 ,消除两极分化 ,最终达到共同富裕”;社会主义特征只是社会主义的特征中的制度特征 ,它决定和体现了社会主义的性质。全面、完整认识社会主义 ,为社会主义建设指明了方向     

英语助动词句法特征分析

文章运用转换生成语法中的某些句法理论,对助动词的一些结构特征进行分析,如助动词作为INFL,空位助动词,助动词作为屈折语的提升,助动词与主语论旨角色的分配,多个助动词在句中出现时的排列顺序等。     

论邓小平理论的本质特征

邓小平理论科学地确定了中国社会主义初级阶段的发展道路 ,以及实现这种发展要求的路线、方针、政策 ,具有鲜明的实践性、实用性和创造性 ,形成其实用理论的基本特征。同时通过对社会主义的实践总结和理论升华 ,提出建设有中国特色的社会主义理论 ,开创了世界社会主义运动发展的新阶段。只有从社会主义发展的一般规律和特殊性要求两个方面 ,才能够完整、准确地把握邓小平理论的实质 ,不断丰富和发展邓小平理论