城市化进程中的失地农民问题研究

随着中国经济的高速发展和城市化水平的不断提高,农地被大量征用并因此产生了为数众多的失地农民。农地征用中的不公正性,使失地农民的利益极大受损。同时,失地农民在向市民角色转变的过程中,又遭遇到种种因素的制约,无奈地沦为城市的“边缘人”。对农民失地的深层次原因及失地农民向市民角色转换的制约因素进行深入探讨,将有助于妥善、合理地解决失地农民的若干问题。     

Assessment of Uncertainty in High Frequency Data: The Observed Asymptotic Variance

The availability of high frequency financial data has generated a series of estimators based on intra‐day data, improving the quality of large areas of financial econometrics. However, estimating the standard error of these estimators is often challenging. The root of the problem is that traditionally, standard errors rely on estimating a theoretically derived asymptotic variance, and often this asymptotic variance involves substantially more complex quantities than the original parameter to be estimated. Standard errors are important: they are used to assess the precision of estimators in the form of confidence intervals, to create “feasible statistics” for testing, to build forecasting models based on, say, daily estimates, and also to optimize the tuning parameters. The contribution of this paper is to provide an alternative and general solution to this problem, which we call Observed Asymptotic Variance. It is a general nonparametric method for assessing asymptotic variance (AVAR). It provides consistent estimators of AVAR for a broad class of integrated parameters Θ = ∫ θ_t dt, where the spot parameter process θ can be a general semimartingale, with continuous and jump components. The observed AVAR is implemented with the help of a two‐scales method. Its construction works well in the presence of microstructure noise, and when the observation times are irregular or asynchronous in the multivariate case. The methodology is valid for a wide variety of estimators, including the standard ones for variance and covariance, and also for more complex estimators, such as, of leverage effects, high frequency betas, and semivariance.     

六角芯棒角隅的测量方法及精度分析

简要论述了桑塔纳车灯ＲＲ反射器的加工模具单元器件六角芯棒的结构特点以及对其角隅的测量方法,最后给出了这一测量方法的精度分析．     

中国大城市居民居住意识变迁及其影响因素

现代化和城市化的进程导致中国大城市居民的居住意识发生变化。对大连市4个地区进行调查研究,结果表明：年龄越高的居民定居意识越强;学历越高的居民移居意识越强;对现居地满意程度越高的居民定居意识越强;市内新区居民的短期居住意识较强,市内旧区居民的移居意识较强,郊外居民的定居意识较强。     

论迟子建小说文本的新开拓

迟子建的小说文本钟情于历史,并吸纳了新的方法。尤其是有关“文革”史与伪满洲国历史的文学表达,作者擅长构建独特的人文视角,从日常生活写起,运用民间立场,书写平凡的生命个体在特殊的历史环境下的真实感受,显示了新历史主义小说的书写策略。     

论复杂性科学对自组织机制的探讨

复杂性理论研究的核心问题不是一般的涌现,而是基于耗散结构的进化的自组织。在此领域内研究者的注意力更汇聚于生物层次以上的系统的能动的自组织。这种自组织的本质特征是以信息动态过程为实质的自我作用。“混沌的边缘”的有序性与无序性相结合的条件使自组织系统的能动性得以发挥:实行合目的性的行为,在多种可能的行为方式中进行选择,自我改善本身的行为决策机构,以及在复杂系统中通过部分与整体的相互作用推动系统的发展。     

论卡夫卡《判决》的叙述策略

《判决》是卡夫卡自己满意的第一篇作品,它开创了卡夫卡小说独特的艺术风格,确立了卡夫卡小说创作的基本叙述特征。小说的多重含义与小说复杂多变的叙述手法是分不开的。小说的意义正是通过其复杂多变的叙述手法来展开并加以实现的,小说的叙述手法也是小说意义的一部分。小说将外在叙述与内在叙述结合在一起,互相转换,有时甚至重叠在一起。随着小说叙述手法的幻想性质的逐渐加强,现实与幻想在小说中变换了位置,幻想的另一面反倒具备了奇异的性质。小说中的种种悖论式的思想总是通过悖论式的叙述方式表现出来。     

倾角传感器动态测量研究

根据测试系统运动方式、工作状况和动态特性，分析其对测试结果的影响．给出一种适用于轨道倾斜角度动态测量的分析方法和计算公式，为测量系统的结构设计、电路设计和实际应用提供参考．     

Estimation of non-parametric regression for dasometric measures

The aim of this paper is to describe a simulation procedure to compare parametric regression against a non-parametric regression method, for different functions and sets of information. The proposed methodology improves lack of fit at the edges of the regression curves, and an acceptable result is obtained for the no-parametric estimation in all studied cases. Larger differences appear at the edges of the estimation. The results are applied to the study of dasometric variables, which do not fulfil the normality hypothesis needed for parametric estimation. The kernel regression shows the relationship between the studied variables, which would not be detected with more rigid parametric models.     

论城市竞争力中的文化产业因素

目前,文化产业越来越成为影响城市竞争力的关键因素。信息产业是知识经济初级阶段的主要智力产业形态,而文化产业是知识经济高级阶段的主要智力形态。美国许多城市的兴衰过程、当局振兴城市的经验措施以及我国一些城市竞争力的变化证明:文化是城市的软件,是软国力,而文化产业则是城市的硬件,是硬国力;未来城市竞争力日益取决于文化产业的发展。以市场化为文化大产业的突破口,注重借鉴和吸取西方发达国家在这方面的经验和教训,化解负面效应,加快改革步伐,变拨款为投资基金,变扶持文化单位为扶持文化项目,力推文化产品出口创汇等是提升城市竞争力当务之急。