改革开放30年中国农村经纪产业演变轨迹研究

通过界定农村经纪产业的概念,从产业的角度,研究改革30年来中国农村经纪产业演变发展的市场运行轨迹和历史发展背景,试图从产业角度,为找出解决中国广大分散的农户与市场对接的管理良策提供基础思路。     

元叙述：叙述者“侵入式”叙述与传统叙述的似真性

新时期小说中的元小说是中国当代小说中一种极为独特的叙事文本,表现出对传统小说叙述特征的冲击与解构,在对当代学者研究成果概述的基础上,可以看出元小说叙述迥异于中国传统文学创作的叙述语言,是小说语言变异的特征之一。     

Earnings of Chinese Immigrants in the Enclave and Mainstream Economy*

La documentation sur le sujet n'est pas décisive quant à savoir si léconomie ethnique enclavée enregistre un rendement économique comparable chez les travailleurs et les entrepreneurs immigrants à ceux qui se situent dans le courant économique principal. Les auteurs de cette étude utilisent des données du Recensement du Canada de 2001 sur la langue la plus utilisée au travail din de mesurer la participation des immigrants chinois à léconomie enclavée. Après les avoir comparés au capital humain ainsi qu'aux variations liées au travail et au milieu urbain, les résultats démontrent que le rendement est moins élevé chez les hommes et chez les femmes de l'enclave que celui des gens qui se trouvent dans le courant économique principal. Les caractéristiques de la langue et le type de travail qui s'effectue dans léconomie enclavée expliquent pourquoi le rendement y est inférieur à celui obtenu dans le courant économique principal. The literature in inconclusive as to whether the immigrant enclave economy offers returns to immigrant workers and entrepreneurs comparative to those in the mainstream economy. This study uses data from the 2001 Census of Canada on language most often used at work to measure enclave economy participation for Chinese immigrants. The findings show that returns are lower for men or women in the enclave than those in the mainstream economy, respectively, after controlling for human capital, work‐related and urban variations. Language features of and job type in the enclave economy explain why returns are inferior to that of the mainstream economy.     

The Development of Anticipatory Smiling

When do infants begin to communicate positive affect about physical objects to their social partners? We examined developmental changes in the timing of smiles during episodes of initiating joint attention that involved an infant gazing between an object and a social partner. Twenty‐six typically developing infants were observed at 8, 10, and 12 months during the Early Social‐Communication Scales, a semistructured assessment for eliciting initiating joint attention and related behaviors. The proportion of infant smiling during initiating joint attention episodes did not change with age, but there was a change in the timing of the smiles. The likelihood of infants smiling at an object and then gazing at the experimenter while smiling (anticipatory smiling) increased between 8 and 10 months and remained stable between 10 and 12 months. The increase in the number of infants who smiled at an object and then made eye contact suggests a developing ability to communicate positive affect about an object.     

试析技术异化的劳动异化根源

探讨现代技术异化的根源,不能只从技术层面去寻找.技术是人类生存实践的产物,技术形态和应用后果都是社会建构的,技术异化的根源也在于社会应用技术的主导模式.通过对劳动异化和技术异化的分析,认为技术异化是以资本主义生产方式和机器技术的大规模应用为前提的,根本的原因则是资本主义生产方式占据主导地位的情况下劳动异化了.因而,技术作为资本增值的内在手段,与劳动和自然对立,技术异化是劳动异化的必然表现.马克思的劳动异化思想,对我们深入理解技术异化的根源及其后果,具有极其重要的指导意义.     

价值多元化视阈下大学生核心价值认同危机与重构

中国社会正处于一个急剧转型时期，人们的生活方式发生了极大变化，出现了许多认同危机，特别是核心价值认同危机。然而，核心价值认同是关系到社会安定和发展的一个重要的心理和文化因素。大学生是推动社会前进的重要力量和潜在力量，因此，考察大学生核心价值认同危机的表现形式，分析产生核心价值认同危机的原因，提出以社会主义核心价值体系重塑大学生价值认同对构建社会主义和谐社会具有重要的现实意义。     

高职任务驱动式教学改革实践初探

高等职业教育的改革对传统课堂面授知识的教学模式提出了挑战，高等职业教育应打破传统的单一课堂教学模式，把课堂搬到企业中，针对企业的需求进行教学与实践，以“企业的需求”为任务驱动教与学，并贯穿于教学的全过程。     

Data skeletons: simultaneous estimation of multiple quantiles for massive streaming datasets with applications to density estimation

We consider the problem of density estimation when the data is in the form of a continuous stream with no fixed length. In this setting, implementations of the usual methods of density estimation such as kernel density estimation are problematic. We propose a method of density estimation for massive datasets that is based upon taking the derivative of a smooth curve that has been fit through a set of quantile estimates. To achieve this, a low-storage, single-pass, sequential method is proposed for simultaneous estimation of multiple quantiles for massive datasets that form the basis of this method of density estimation. For comparison, we also consider a sequential kernel density estimator. The proposed methods are shown through simulation study to perform well and to have several distinct advantages over existing methods.     

Constrained allocation problems with single-peaked preferences: An axiomatic analysis

We introduce a new class of problems that contains two existing classes: allocation problems with single-peaked preferences and bankruptcy problems. On this class, we analyze the implications of well-known properties such as Pareto optimality, strategy-proofness, resource-monotonicity, no-envy, equal treatment of equals, and two new properties we introduce, hierarchical no-envy and independence of nonbinding constraints. Unlike earlier literature, we consider rules that allow free-disposability. We present characterizations of a rule we introduce on this domain. We relate this rule to well-known rules on the aforementioned subdomains. Based on this relation, we present a characterization of a well-known bankruptcy rule called the constrained equal awards rule. Received: 22 June 2000/Accepted: 21 March 2002 This paper is based on the first chapter of my Ph.D. thesis submitted to the University of Rochester. I wish to thank my advisor, William Thomson, for helpful comments and suggestions.     

Loss functions for estimation of extrema with an application to disease mapping

It is often of interest to find the maximum or near maxima among a set of vector‐valued parameters in a statistical model; in the case of disease mapping, for example, these correspond to relative‐risk “hotspots” where public‐health intervention may be needed. The general problem is one of estimating nonlinear functions of the ensemble of relative risks, but biased estimates result if posterior means are simply substituted into these nonlinear functions. The authors obtain better estimates of extrema from a new, weighted ranks squared error loss function. The derivation of these Bayes estimators assumes a hidden‐Markov random‐field model for relative risks, and their behaviour is illustrated with real and simulated data.