Methods for diagnosing multiplicative-interaction models for two-way contingency tables

An expanded class of multiplicative-interaction (M-I) models is proposed for two-way contingency tables. These models a generalization of Goodman's association models, fill in the gap between the independence and the saturated models. Diagnostic rules based on a transformation of the data are proposed for the detection of such models. These rules, utilizing the singular value decomposition of the transformed data, are very easy to use. Maximum likelihood estimation is considered and the computational algorithms discussed. A data set from Goodman (1981) and another from Gabriel and Zamir (1979) are used to demostrate the diagnostic rules.     

回汉杂居社区伊斯兰社会文化空间的构建——以滇中纳古镇为例

散杂居民族地区是中国"大杂居,小聚居"民族分布格局的重要组成部分。既有的宗教地理研究关注于特定社会情境下族群或宗教团体间所发生的空间冲突和博弈,而缺乏对族际和谐交往过程中的宗教文化空间的研究。通过对滇中纳古镇一个回汉杂居社区的考察发现,不但在回族为主体的穆斯林群体内部可以形成稳定的伊斯兰社会文化空间,而且在回汉族际交往的过程中,这一社会文化空间也会得到进一步扩展,同时也形成了族际间和平共享公共空间的格局。历史时期的回族文化主体地位,当代回族经济实体的强大,以及回汉在宗教信仰上的相互尊重,都使得伊斯兰文化成为纳古社区的文化表征和化解族际之间文化隔阂的有效途径。     

构建以创新力为导向的大学评价体系的基本原则

大学评价体系是由反映评价目的的评价指标系统、指标权重和指标评价标准构成的一个有机整体,它是实现大学评价的重要手段。以创新力为导向,构建科学、合理、可行的新型大学评价体系,是确保大学评价公正、实现大学评价科学化的重要环节,其实质在于提高大学的核心竞争力。在构建以创新力为主导的大学评价体系时,我们需要遵循与目标一致原则、导向性原则、客观性原则、可操作性原则、简易性原则。     

Goodness-of-fit Tests for Semi-Markov and Markov Survival Models with One Intermediate State

Survival data with one intermediate state are described by semi-Markov and Markov models for counting processes whose intensities are defined in terms of two stopping times T ₁< T ₂. Problems of goodness-of-fit for these models are studied. The test statistics are proposed by comparing Nelson–Aalen estimators for data stratified according to T ₁. Asymptotic distributions of these statistics are established in terms of the weak convergence of some random fields. Asymptotic consistency of these test statistics is also established. Simulation studies are included to indicate their numerical performance.     

新能源汽车消费促进政策对潜在消费者购买意愿的影响

如何提升潜在消费者的购买意愿对于促进新能源汽车市场发展至关重要。本文以SOR理论为基础,通过对河南省洛阳市四个县区的问卷调查,运用结构方程模型分析了新能源汽车消费促进政策对潜在消费者的影响。结果表明：①消费促进政策通过感知价值和感知风险对潜在消费者的购买意愿产生影响,其中充电政策的影响最大,路权政策次之,再次是宣传政策,购车政策的影响最小。因此,购车政策退坡后新能源汽车销量大幅下滑的局面不太可能发生。②潜在消费者更加关注新能源汽车的前期感知价值而较少关注后期的使用风险,宣传政策、购车政策及充电政策越完备,潜在消费者对新能源汽车的感知价值越高,越能激发其购买意愿。③在不同群体间,收入和教育背景对新能源汽车购买意愿的调节作用比较明显,高收入高学历的潜在消费者更加关注购车后的使用权益保障,即路权政策以及充电政策,而低学历低收入的潜在消费者更加关注前期的消费权益保障,即购车政策的经济激励。在政策各环节对感知风险的影响路径上,低收入以及低学历群体的感知风险普遍比高学历高收入群体要显著。鉴于此,本文提出,新能源汽车消费促进政策应注重充电市场的完善,将购车经济补贴政策逐步向充电基础设施以及路权优惠政策方面转移,且针对不同层次的潜在消费者要实施差异化、多元化的促销政策。     

东北地区城镇家庭劳动供给行为研究——基于劳动供给离散选择模型的经验分析

文章建立了一个劳动供给离散选择模型,用于分析东北地区城镇居民的家庭联合劳动供给行为。研究结果表明,整体上女性劳动参与和工作时间的自身工资弹性分别约为0.151和0.175,交叉工资弹性分别约为-0.009和-0.015;而男性劳动参与和工作时间的自身工资弹性分别约为0.034和-0.024,交叉工资弹性分别约为-0.115和-0.134。随着家庭收入的增加,无论女性还是男性,劳动参与和工作时间的自身工资弹性及交叉工资弹性均呈递减趋势。因此,设计和实施提高工资水平的公共政策将会促进东北地区城镇居民的劳动供给,特别是对低收入群体劳动供给的促进作用将尤为明显。     

Minimizing the total cost of barrier coverage in a linear domain

Barrier coverage, as one of the most important applications of wireless sensor network (WSNs), is to provide coverage for the boundary of a target region. We study the barrier coverage problem by using a set of n sensors with adjustable coverage radii deployed along a line interval or circle. Our goal is to determine a range assignment \(\mathbf {R}=({r_{1}},{r_{2}}, \ldots , {r_{n}})\) of sensors such that the line interval or circle is fully covered and its total cost \(C(\mathbf {R})=\sum _{i=1}^n {r_{i}}^\alpha \) is minimized. For the line interval case, we formulate the barrier coverage problem of line-based offsets deployment, and present two approximation algorithms to solve it. One is an approximation algorithm of ratio 4 / 3 runs in \(O(n^{2})\) time, while the other is a fully polynomial time approximation scheme (FPTAS) of computational complexity \(O(\frac{n^{2}}{\epsilon })\). For the circle case, we optimally solve it when \(\alpha = 1\) and present a \(2(\frac{\pi }{2})^\alpha \)-approximation algorithm when \(\alpha > 1\). Besides, we propose an integer linear programming (ILP) to minimize the total cost of the barrier coverage problem such that each point of the line interval is covered by at least k sensors.     

《献给爱米丽的玫瑰》的写作艺术赏析

福克纳以擅长在小说中运用多种写作艺术和技巧而闻名。短篇小说《献给爱米丽的玫瑰》展现了福克纳的许多精湛的写作艺术和技巧,小说中大量运用了象征手法,巧妙地设置了悬念,这些使得文章意味深长,耐人琢磨;同时哥特式的描写又渲染了阴郁和神秘的氛围,使故事情节跌宕起伏、扣人心弦。     

转型期高校的社会主义荣辱观教育

高校是实施德育的重要阵地。在我国社会转型的关键时期,加强以社会主义荣辱观教育为核心的高校德育工作具有重大的现实意义。为此,应该着重从加强领导班子的荣辱观教育、教师的荣辱观教育、学生的荣辱观教育和高校周边群体的荣辱观教育等方面,切实有效地推动高校的德育工作。     

ESP与商务英语专业核心能力的培养

本研究旨在高职商务英语专业建设方面提供一种富有创新意义的思考。依据ESP教学理念,笔者认为,三位一体的"英语交际+办公管理+外贸实务"能力是高职商务英语专业核心能力,必须依靠模块化课程的合理设计和教学模式的改革创新,才能使学生对核心能力课程融会贯通,形成理想的外贸业务能力。