北朝胡人贵族门第婚中的胡汉通婚

北朝时期,胡汉之间通婚频繁,胡人贵族与汉人高门大姓之间尤为明显.胡汉通婚成为影响当时政治格局、社会结构、历史进程和文化互动的重要因素.此文主要剖析了在汉族门第婚观念的影响下,胡人贵族与汉族高门大姓之间的通婚表现,探讨了胡汉门第通婚在政治与社会文化方面的影响.     

Adaptive truncated weighting for improving marginal structural model estimation of treatment effects informally censored by subsequent therapy

Randomized clinical trials are designed to estimate the direct effect of a treatment by randomly assigning patients to receive either treatment or control. However, in some trials, patients who discontinued their initial randomized treatment are allowed to switch to another treatment. Therefore, the direct treatment effect of interest may be confounded by subsequent treatment. Moreover, the decision on whether to initiate a second‐line treatment is typically made based on time‐dependent factors that may be affected by prior treatment history. Due to these time‐dependent confounders, traditional time‐dependent Cox models may produce biased estimators of the direct treatment effect. Marginal structural models (MSMs) have been applied to estimate causal treatment effects even in the presence of time‐dependent confounders. However, the occurrence of extremely large weights can inflate the variance of the MSM estimators. In this article, we proposed a new method for estimating weights in MSMs by adaptively truncating the longitudinal inverse probabilities. This method provides balance in the bias variance trade‐off when large weights are inevitable, without the ad hoc removal of selected observations. We conducted simulation studies to explore the performance of different methods by comparing bias, standard deviation, confidence interval coverage rates, and mean square error under various scenarios. We also applied these methods to a randomized, open‐label, phase III study of patients with nonsquamous non‐small cell lung cancer. Copyright © 2015 John Wiley & Sons, Ltd.     

中华民族传统核心价值观探析

中华民族传统核心价值观包括以下几个方面：博爱、和谐、正义、民本。这些蕴含在中华传统文化中的价值观系统,体现了中华民族所共有的心理情感和伦理特色,直至今日仍潜移默化地影响着我们的民族性格,成为维系整个中华民族的精神和心理纽带,是培育和弘扬社会主义核心价值观不可或缺的精神资源。     

平面设计类实训课程现状与对策——基于河北科技师范学院相关专业学生的调查

通过对河北科技师范学院相关专业平面设计类实训课程现状和需求的调研,发现实训课程目的不明确、实训内容脱离实践和设计缺乏创意、硬件设施不足和设备陈旧、实训过程缺乏监管等问题,提出加大实训课时比例、落实真实化实训任务、加强实训教师联合化、开拓校内外实训基地、构建实训管理体系、完善多元化考核体系等策略。     

Weighted empirical likelihood for generalized linear models with longitudinal data

In this paper, we introduce the empirical likelihood (EL) method to longitudinal studies. By considering the dependence within subjects in the auxiliary random vectors, we propose a new weighted empirical likelihood (WEL) inference for generalized linear models with longitudinal data. We show that the weighted empirical likelihood ratio always follows an asymptotically standard chi-squared distribution no matter which working weight matrix that we have chosen, but a well chosen working weight matrix can improve the efficiency of statistical inference. Simulations are conducted to demonstrate the accuracy and efficiency of our proposed WEL method, and a real data set is used to illustrate the proposed method.     

《劳动合同法》社会价值分析——基于劳动者、企业、社会长期利益的视角

《劳动合同法》的颁布实施引起了理论及实务界的诸多批评,批评的核心是认为该法过度地增加了企业用人成本,干预了企业灵活的用人制度,从而可能导致企业负担过重而破产,最终给经济和就业都造成负面影响。但从劳动者、企业及社会三个方面的长期成本与收益的视角展开综合比较分析,该法长期实施对三者都将是有利的,有助于构建和发展和谐稳定的劳动关系,并最终促成人与经济的协调发展。     

我国县级城市发展质量综合评价——以江苏省县级市为例

城市是一个有多种要素组成的复合体。为准确把握城市的发展质量,运用系统论的观点进行城市的构成分析,从而对城市发展质量进行评价,其评价的目的在于发展性评价,通过对各被评价城市人口、经济、生活、环境、基础设施及整个系统质量的排序或分类,以及对城市质量系统发展的协调性研究等,使我们便于发现城市化进程中存在的问题与不足,使决策者能从城市化质量不断提高的角度来改变其决策结果,为今后城市发展质量的全面提高、科学的决策提供客观依据。对于我国省辖市发展质量的综合评价,笔者已进行过研究。但对县级市来说,无论其发展质量、发展规…     

石家大院纪行

一、历史沿革 石家大院位于天津市西青区杨柳青镇,避开市镇的车马喧嚣,在一片深巷之中,这座青砖陶瓦的重重院落显得格外突出.石家大院始建于清末(约1875年),至今已有130年的历史.据说当初石家宅院共有15进院落,占地6000多平方米.现在对外开放的并非当初建造时规模最大的,只是至今保存最完好的一座.     

A sparse optimization problem with hybrid $$L_2{\text {-}}L_p$$ L 2 - L p regularization for application of magnetic resonance brain images

Journal of Combinatorial Optimization - Regularization techniques have been proved useful in an enormous variety of sparse optimization problem. In this paper, we introduce a new formulation of...