中部地区发展循环经济的对策研究

目前,我国中部地区在全国经济发展格局中呈现出发展水平低于东部,发展速度慢于西部的“塌陷”态势。针对这一情况,中央把中部崛起作为一个国家经济发展的重大战略提出来。中部地区要发展必须彻底改变传统经济的发展模式,而采用循环经济发展模式。通过对中部地区的经济社会现状进行分析,指出其发展循环经济的迫切性;得出其发展循环经济的相应对策。     

On distribution-weighted partial least squares with diverging number of highly correlated predictors

Summary.  Because highly correlated data arise from many scientific fields, we investigate parameter estimation in a semiparametric regression model with diverging number of predictors that are highly correlated. For this, we first develop a distribution-weighted least squares estimator that can recover directions in the central subspace, then use the distribution-weighted least squares estimator as a seed vector and project it onto a Krylov space by partial least squares to avoid computing the inverse of the covariance of predictors. Thus, distrbution-weighted partial least squares can handle the cases with high dimensional and highly correlated predictors. Furthermore, we also suggest an iterative algorithm for obtaining a better initial value before implementing partial least squares. For theoretical investigation, we obtain strong consistency and asymptotic normality when the dimension p of predictors is of convergence rate O { n ^1/2/ log ( n )} and o ( n ^1/3) respectively where n is the sample size. When there are no other constraints on the covariance of predictors, the rates n ^1/2 and n ^1/3 are optimal. We also propose a Bayesian information criterion type of criterion to estimate the dimension of the Krylov space in the partial least squares procedure. Illustrative examples with a real data set and comprehensive simulations demonstrate that the method is robust to non-ellipticity and works well even in 'small n –large p ' problems.     

中亚东干族文化传统及近年中亚地区汉语教学的发展

中亚东干族是中国陕甘回民的后裔,是因战争迁徙而聚居于哈、吉、乌三国的华人群体。本文考察中亚东干族的形成,分析其突出的文化表征,阐述东干文化对中国汉文化的继承,介绍国内对东干留学生的汉语教学与中亚地区汉语教学的现状及发展前景。     

A variable-neighbourhood search algorithm for finding optimal run orders in the presence of serial correlation

The responses obtained from response surface designs that are run sequentially often exhibit serial correlation or time trends. The order in which the runs of the design are performed then has an impact on the precision of the parameter estimators. This article proposes the use of a variable-neighbourhood search algorithm to compute run orders that guarantee a precise estimation of the effects of the experimental factors. The importance of using good run orders is demonstrated by seeking D-optimal run orders for a central composite design in the presence of an AR(1) autocorrelation pattern.     

Conflicts in urban fringe in the transformation era: An examination of performance of the metropolitan growth management in Beijing

The performances of urban growth management are often criticized because their original objectives are frequently inconsistent with local development facts. Underlying the many reasons for this are the political and institutional contexts that influence policy-making and development activities. The urban fringe, a zone is managed to against urban sprawl in many countries, represents the conflicts between urban management system and local development resulting from political transformation. This study examines the case of decentralised-concentration strategy, one of the most important metropolitan growth management in Beijing since the 1990s, and sheds some lights on the performance of the growth management in the transformation context. The results suggest that the aims of municipal growth management to concentrate developments in urban fringe have partly been achieved through actual local developments; however, some unexpected and illegal local developments outside the planned areas are counterproductive from the perspective of municipal growth management. The performance of the present growth management is being challenged by new trends towards political decentralisation and locally fiscal responsibilities. In the interest of future policymaking, the dominant central planning system in Beijing should take these decentralisation trends into growth management account, compared with the great progress in decentralisation in economy system. The urban policy needs to shift from the dictatorial manner and put more efforts into creating a harmonious relationship between municipal growth management and actual local demands on development.     

The Tunnel at the End of the Light: the Crisis of Transition in Hungary

The economic, political and social transition processes of the last two decades, far from being in harmony, clearly have a detrimental rather than an enriching influence on each other. These processes will never become harmonised just by themselves in a natural fashion. The worst obstacle of a successful transformation is that the chief actors, such as the government, the market and the representatives of the society. The Prince, the Merchant and the Citizen do not show the necessary commitment, competence and determination to create a new, effective type of partnership. This is a challenge which urgently demands answers on all levels of governance, economic and social life. This must be done in the frames of local communities, and on the regional, the European and the global levels. Nearly twenty years after the political turnabout, Hungary now needs a new social contract and must lay down the ethical, political, institutional and intellectual foundations for its twenty-first century democracy.

Kairos economies in the post-Soviet transition period of Central Asia

There are times when entire populations of certain countries have had to readjust their lives and economic strategies as all of society is under transition. Post-Soviet Central Asia underwent this period after 1991. During times of transition, there are always people that tend to be able to make use of the new uncertainties, even at the risk of entering legal grey areas. Here new social groups emerge, ethnic origin becomes relevant and new kinship ties are made. These transformation periods are often short and provide limited opportunities for analysing the strategies of those pioneers that I call Kairos economists. They often act only in cooperation with residents of the border and with duty customs and security personnel. This article analyses this special economy with the help of case studies that have been observed during the transformation period from the Soviet to an independent Central Asia.     

Estimation of variance in bivariate normal distribution after the preliminary test of homogeneity

A preliminary test estimator of variance in the bivariate normal distribution is proposed after the Pitman–Morgan test of homogeneity of two variances. The bias and mean square error of the estimator are derived. The relative efficiency (RE) of the preliminary test estimator is studied. Computations and 3D graphs of RE for different parameters are analyzed. In order to get the maximum RE, recommendations of the significance level for the preliminary test are given for various sample sizes by using the max–min criterion.     

Formation of European identity: ethnic minority groups in Central and Eastern Europe in generational perspective

Research into European identity has mostly focused on majority populations in Western European countries, neglecting new member states in Central and Eastern Europe (CEE) as well as ethnic minority groups. This paper contributes to filling this gap by exploring and investigating processes of European identity formation of five ethnic minority groups in four CEE countries. A generational perspective was applied by conducting qualitative in-depth interviews with three generations of ethnic minority group members. The results support the instrumental approach of identity construction. In all minority groups researched, the young generation, due to more positive personal experiences and perceived benefits from the European Union, have developed more positive images and perceptions of Europe and a greater sense of European identity than older generations. Furthermore, ethnic group-specific processes of identity formation were found.