马克思主义民族理论在新世纪的新发展--学习胡锦涛同志在中央民族工作会议上的重要讲话

胡锦涛同志在中央民族工作会议上的讲话,是新世纪新阶段我国民族工作的纲领性文件,是对党和国家的民族理论和政策一个新的丰富和发展,也是对马克思主义民族理论的新发展.     

大都市的扩展历程与大都市边缘区的城乡一体化问题分析

以一座三塔悬索桥为分析对象,采用SAP2000平台建立该桥空间动力有限元模型并进行非线性动力分析,研究了地震作用下,缆梁间设置中央扣、中塔与主梁间设置弹性索和二者组合使用对于该桥抗震性能的影响。分析结果表明,缆梁间设置中央扣可以显著减小主梁位移和中塔塔底剪力和弯矩,但会使各塔顶主索鞍座水平力和边塔内力增加;选用合理的弹性索刚度,可以有效控制主梁位移,同时使中塔与边塔的受力处于合理范围内;两者组合使用,能够进一步降低主梁位移和均衡中塔与边塔的受力,同时可以减小弹性索索力,更有利于中塔下横梁受力。     

中国对中亚能源投资的法律问题及对策

中国与中亚在能源方面合作不断加强,逐步形成了更加紧密的能源安全共同体,然而在双方投资与合作过程中诸多相关法律问题也不断涌现,使中国对中亚地区的能源投资风险加大。文章对中亚能源投资中对投资的界定、投资准入、政治风险及环境保护等相关投资法律问题进行研究与分析,提出中国在中亚投资与合作过程中的相应对策,将对中国能源投资规避风险、保护投资利益大有裨益。     

On asymptotic distribution of prediction in functional linear regression

There has been substantial recent attention on problems involving a functional linear regression model with scalar response. Among them, there have been few works dealing with asymptotic distribution of prediction in functional linear regression models. In recent literature, the centeral limit theorem for prediction has been discussed, but the proof and conditions under which the random bias terms for a fixed predictor converge to zero have been ignored so that the impact of these terms on the convergence of the prediction has not been well understood. Clarifying the proof and conditions under which the bias terms converge to zero, we show that the asymptotic distribution of the prediction is normal. Furthermore, we have derived those results related to other terms that already obtained by others, under milder conditions. Finally, we conduct a simulation study to investigate performance of the asymptotic distribution under various parameter settings.     

湖南省区域中心城市发展中的人口问题研究——以长株潭城市群为例

基于长株潭城市群人口发展现状,利用相关人口指标与武汉、广州等经济发达城市相比较,表明长株潭城市群在人口规模、行业人口结构及人口质量等方面存在一些问题,并提出促进城市发展的人口对策。     

A general central limit theorem and a subsampling variance estimator for α‐mixing point processes

We establish a central limit theorem for multivariate summary statistics of nonstationary α‐mixing spatial point processes and a subsampling estimator of the covariance matrix of such statistics. The central limit theorem is crucial for establishing asymptotic properties of estimators in statistics for spatial point processes. The covariance matrix subsampling estimator is flexible and model free. It is needed, for example, to construct confidence intervals and ellipsoids based on asymptotic normality of estimators. We also provide a simulation study investigating an application of our results to estimating functions.     

A semi-parametric method for estimating the beta coefficients of the hidden two-sided asset return jumps

ABSTRACT

We introduce a new methodology for estimating the parameters of a two-sided jump model, which aims at decomposing the daily stock return evolution into (unobservable) positive and negative jumps as well as Brownian noise. The parameters of interest are the jump beta coefficients which measure the influence of the market jumps on the stock returns, and are latent components. For this purpose, at first we use the Variance Gamma (VG) distribution which is frequently used in modeling financial time series and leads to the revelation of the hidden market jumps' distributions. Then, our method is based on the central moments of the stock returns for estimating the parameters of the model. It is proved that the proposed method provides always a solution in terms of the jump beta coefficients. We thus achieve a semi-parametric fit to the empirical data. The methodology itself serves as a criterion to test the fit of any sets of parameters to the empirical returns. The analysis is applied to NASDAQ and Google returns during the 2006–2008 period.     

When is n large enough? Looking for the right sample size to estimate proportions

The central limit theorem indicates that when the sample size goes to infinite, the sampling distribution of means tends to follow a normal distribution; it is the basis for the most usual confidence interval and sample size formulas. This study analyzes what sample size is large enough to assume that the distribution of the estimator of a proportion follows a Normal distribution. Also, we propose the use of a correction factor in sample size formulas to ensure a confidence level even when the central limit theorem does not apply for these distributions.     

中央苏区时期毛泽东关于关心群众生活的重要论述及实践探析

毛泽东基于中央苏区各方面资源受局限的实际情况,从巩固新生苏维埃政权和提升群众生活水平出发,提出必须关心群众生活。毛泽东以群众组织起来为中心脉络,把建立具有集体经济性质的合作社作为制度前提,通过建立新的金融制度、开展反剥削的商业斗争和开办专业技术学校,全面实践关心群众生活的系列论述。当下,应当充分吸收毛泽东关心群众生活重要论述的精髓,坚持以人民为中心的发展理念,提升人民的获得感、幸福感和安全感,发挥人民群众的劳动创造力。     

河南城镇化进程中的犯罪问题研究

河南省城镇化实施中心城市带动战略,对犯罪形势变化将产生深刻的影响:犯罪率将呈现先升后降最终稳定的态势;流动人口犯罪、青少年犯罪、女性犯罪、职务犯罪等将会激增;各种类型犯罪在短期内都会大量增加;一些社会管理控制相对薄弱的"边缘地带"有可能成为犯罪孳生地。河南省应实行综合治理的犯罪防控战略。