滨海新区土地的开发与高效利用

继深圳、浦东之后,国家将大规模开发天津滨海新区.国家"十一五"发展规划,将开发滨海新区列入国家重要的战略布局,期冀通过开发滨海新区,带动环渤海区域经济发展,进而改变我国经济"南快北慢"的局面.这给滨海新区带来了前所未有的发展机遇,但同时,土地资源的有限性也成为制约滨海新区发展速度的因素之一.因此滨海新区今后的土地开发方向、如何实现土地资源的高效利用成为目前亟须研究的课题.     

拓展与优化城市公共空间的思考

一、引言 一般认为,城市公共空间是城市中面向公众开放使用和进行各种活动的空间,是社会、经济、文化、科技、自然、地理气候等多种因素综合作用于城市的物质形态表现;是由各种实体(道路、街区、建筑物、树木、广场、绿地和其他设施等)共同构成的城市空间.     

大学生群殴事件的反思

大学生群殴事件是在社会结构转型、社会矛盾凸现、刑事案件高发与高等教育日趋大众化的背景下发生,已成为高校的治安隐患,引起了社会的广泛关注。本文从群殴事件的特征、原因、对策等方面进行探讨,以便有效遏制其发生和蔓延。     

论城市房屋拆迁中的法律问题

在当前城市拆迁过程中,由于诸多复杂因素,引起了许多纠纷与矛盾,有的甚至非常严重。从法律关系的角度来看,这其中涉及到复杂法律关系的处理,包括行政法律关系和民事法律关系。这两种法律关系处理的好坏,直接关系到城市拆迁活动的顺利进行,也关系到拆迁法律关系中各方当事人利益的保护问题。同时,现有的城市拆迁法律制度的不完善,在一定程度上给这类问题的解决带来了不便。本文拟从城市拆迁中的法律关系、拆迁法律制度中存在的问题和城市拆迁中行政机关的角色定位等方面进行分析和探讨,以期更好地认识和解决拆迁过程中产生的问题。     

Household Assets,the Role of Government Assistance,and Depression Among Low-Income Families in Shanghai

As China’s economy is rapidly changing from a planned to a capitalist economy, many families find themselves financially struggling. In some cases, conflicting values and attitudes may contribute to mental health challenges such as depression that would lead to further feelings of helplessness and immobilization. Using a random sample of 1006 low-income households from Pudong District of Shanghai, China, this study aims to examine the relationships between household assets, beliefs about government as the primary way to improve economic circumstances and self-reported depressive symptoms. In addition, this study investigates the mediation effects of beliefs that government is the best change agent for improved life circumstances on the relationship between household assets and depression. We found those who indicated that government was the main means for attaining a better life had significantly higher depression levels whereas higher numbers of household assets were associated with lower depression levels. We also found that viewing government as the most important change agent only partially mediated the relationship between household assets and depression (p?<?.001). Findings from this study support anti-poverty policies and social work related practice initiatives aimed at assisting low income families in China, in particular the need to address psychological as well as economic needs.

     

储光羲研究三题

储光羲是唐代著名诗人,是江苏与常州的历史文化名人。文章根据史料与储氏宗谱的各种版本,对储光羲是贺知章的外甥、储光羲的官职品秩作了较为科学的考证,并对如何编修储氏宗谱以加强对这位重要人物的研究与评价,提出了切实可行的建议。     

论政治文明的文化选择

文化即人化,它是人类所创造的精神成果和物质成果的总和;文明是文化的结晶,是文化主体对人类文化中野蛮性、愚昧性不断扬弃的结果,是人类有目的、有选择地过滤人类文化、形成合理文化内核的过程。中国当前的政治文明建设,需要走出“精华”和“糟粕”的简单二分的误区,用外来文化中国化、传统文化现代化,来开辟中国文化发展之路。弱化暴力色彩,强化仁政效应,构建中国特色的政治文明。     

Robust inference for estimating equations with nonignorably missing data based on SIR algorithm

Nonresponse is a very common phenomenon in survey sampling. Nonignorable nonresponse – that is, a response mechanism that depends on the values of the variable having nonresponse – is the most difficult type of nonresponse to handle. This article develops a robust estimation approach to estimating equations (EEs) by incorporating the modelling of nonignorably missing data, the generalized method of moments (GMM) method and the imputation of EEs via the observed data rather than the imputed missing values when some responses are subject to nonignorably missingness. Based on a particular semiparametric logistic model for nonignorable missing response, this paper proposes the modified EEs to calculate the conditional expectation under nonignorably missing data. We can apply the GMM to infer the parameters. The advantage of our method is that it replaces the non-parametric kernel-smoothing with a parametric sampling importance resampling (SIR) procedure to avoid nonparametric kernel-smoothing problems with high dimensional covariates. The proposed method is shown to be more robust than some current approaches by the simulations.     

Hard thresholding regression

In this paper, we propose the hard thresholding regression (HTR) for estimating high‐dimensional sparse linear regression models. HTR uses a two‐stage convex algorithm to approximate the ?₀‐penalized regression: The first stage calculates a coarse initial estimator, and the second stage identifies the oracle estimator by borrowing information from the first one. Theoretically, the HTR estimator achieves the strong oracle property over a wide range of regularization parameters. Numerical examples and a real data example lend further support to our proposed methodology.     

The Importance of Racial Socialization: School‐Based Racial Discrimination and Racial Identity Among African American Adolescent Boys and Girls

This study examined various parental racial socialization messages as mediators between school‐based racial discrimination and racial identity formation over 4 years for African American boys (N = 639) and African American girls (N = 711). Findings indicated that school‐based racial discrimination was associated with racial identity beliefs. For African American boys, behavioral racial socialization messages mediated the relation between school‐based racial discrimination and racial centrality over time. Mediation also resulted for African American girls, but for a different set of race‐related messages (negative messages and racial barriers) and racial identity beliefs. The developmental significance of the findings and implications for future research are discussed.