A Note on Estimation in Hilbertian Linear Models

We study estimation and prediction in linear models where the response and the regressor variable both take values in some Hilbert space. Our main objective is to obtain consistency of a principal component‐based estimator for the regression operator under minimal assumptions. In particular, we avoid some inconvenient technical restrictions that have been used throughout the literature. We develop our theory in a time‐dependent setup that comprises as important special case the autoregressive Hilbertian model.     

Consistency of a class of information criteria for model selection in non-linear regression

In this paper we prove the consistency in probability of a class of generalized BIC criteria for model selection in non-linear regression, by using asymptotic results of Gallant. This extends a result obtained by Nishii for model selection in linear regression.     

发展中小企业要走技术创新之路

本文阐述了技术创新对于发展中小企业的重要性以及中小企业实施技术创新的现实可能性。并就进一步推进中小企业技术创新提出了一些新的设想和建议     

Consistent Nonparametric Tests for Lorenz Dominance

This article proposes consistent nonparametric methods for testing the null hypothesis of Lorenz dominance. The methods are based on a class of statistical functionals defined over the difference between the Lorenz curves for two samples of welfare-related variables. We present two specific test statistics belonging to the general class and derive their asymptotic properties. As the limiting distributions of the test statistics are nonstandard, we propose and justify bootstrap methods of inference. We provide methods appropriate for case where the two samples are independent as well as the case where the two samples represent different measures of welfare for one set of individuals. The small sample performance of the two tests is examined and compared in the context of a Monte Carlo study and an empirical analysis of income and consumption inequality.     

当代相声艺术兴衰之因初探——以侯派相声为例

作为当代相声的第一流派，侯派相声的发展浓缩了当代相声发展史。通过侯派的发展看，推动当代相声兴衰变化的关键要素有三：一是高雅化之力。当代相声渐趋高雅，表演风格日渐美化而具“学究气”。高雅化使相声获得了文人支持和高端市场而一举成功，但也逐渐失去底层观众而日渐衰落。二是政治化之力。政治推动当代相声至最高潮而显赫一时，也使其艺术观念畸形化、创作工具化及艺术手法扭曲，失去了根本而致日后衰败。三是新媒体之力。新媒体推动当代相声风靡全国、家喻户晓，但也使之沦为滑稽快餐。电视媒体促使当代相声演化为喜剧小品，最终偏离了传统相声的范畴。     

微生物燃料电池研究进展

微生物燃料电池,是微生物技术与电池技术相结合的产物,利用微生物整体为催化剂催化燃料转化为电能的装置。近年来,相继有多种微生物菌株被发现有电化学活性,大大拓展了微生物燃料电池的应用领域,如直接制造生物传感器、处理废水产电等。微生物燃料电池的研究与应用,对缓解当前的能源危机有重大意义,其发展潜力很大。文章简述了微生物燃料电池的工作原理和结构,综述了国内外最新的研究进展,分析了影响电池性能的各参数的关系,期望对微生物燃料电池的开发有所帮助。     

从翻译目的论看企业外宣资料汉英翻译原则

文章运用翻译目的论的有关原理,并通过译例分析,提出企业外宣资料汉英翻译应遵循“传译主要信息、语用等效、概念术语的译名统一”的原则。贯彻这三条原则有助于达到译界所公认的“以传达信息为目的,同时考虑信息的传递效果”的应用文体翻译标准。     

Propriétés dans L2 et estimation des processus purement bilinéaires et strictement superdiagonaux à coefficients périodiques

L₂‐properties and estimation of purely bilinear and strictly superdiagonal time series models with periodic coefficients The authors consider the subclass of purely bilinear and strictly superdiagonal time series models with periodic coefficients. Indeed, thanks to their possible application to a wide variety of fields including economics and finance, bilinear time series models with time‐dependent coefficients have recently been the object of attention in the statistical literature. The authors give conditions ensuring the existence of a causal solution in L², the invertibility and the existence of higher‐order moments. The problem of estimating the parameters is also investigated through an approach based on second and third empirical moments. The authors numerically illustrate their theoretical results via Monte Carlo simulations.     

中小企业融资状况及认识悖论分析

中小企业由于信用度不高 ,直接融资渠道的缺乏以及间接融资渠道的单一 ,使其面临着融资困难的局面。但是在理论界以及实践中对解决中小企业融资难问题的认识上还存在悖论。实际上 ,国有银行和中小企业存在信息上的不对称 ,以及片面发展中小金融机构 ,解决中小企业融资难的问题是缺乏依据的 ,文章分析了这些悖论并相应的给出了自己的见解。     

Urban Space and Cyberspace: Urban Environment in the Age of Media and Information Technology

Today, the many innovations and the spread of new media and information technologies are bringing new realities to contemporary society. In Japanese sociology, this social transformation is called johoka , or information–oriented transformation. The present study examines two aspects of today's urban environment, concerning this social transformation. One is the phenomenon of "Disneylandization" of the urban environment and the other is the emergence of "cyberspace" or the "cybercity". The former is the proliferation of areas and buildings filled with signs and designs that are quoted from other historical or geographical contexts, and arranged under some "theme" or "concept", such as theme parks. The latter is the emergence of "virtual spaces" and the "virtual city" in computer networks, especially on the Internet. The former is a change in the physical urban environment and the latter is a phenomenon of the non–physical environment, inside computers. However, in spite of this contrast, these phenomena can be considered to result from the same social transformation—that is, the new relationship between space and society. The semantic emptiness, and expectations and desires for a sense of "placeness" in contemporary society are the preconditions of both phenomena. Often these elements are regarded as postmodern phenomena, yet it is of interest to explore Disneylandization and the emergence of the cybercity as the latest versions of the modern urban transformation and the modern urbanism.