高速铁路桩板结构承载板伸缩温度力研究

以某高速铁路桩板结构路基工程为背景，研究了桩板结构路基单联跨数对承载板体伸缩温度应力的影响规律，提出了桩板结构的结构布置原则；并根据桩板结构路基具体结构特征，推导了计算结构整体升降温引起的承载板体伸缩温度应力计算公式，该解析式与空间有限元法计算结果较好吻合，可方便地计算承载板的伸缩温度应力。     

Evaluating the causal economic impacts of transport investments: evidence from the Madrid–Barcelona high speed rail corridor

This paper evaluates economic impacts arising from the introduction of high-speed rail (HSR) between Madrid and Barcelona. Using difference-in-differences estimation we estimate an average treatment effect for provinces with stops on the HSR line of 2.4% for economic output, 3.3% for numbers of firms, and 1.1% for labour productivity. We complement our DID results with a synthetic control analysis for Lleida and Tarragona, two provinces that we argue were assigned HSR stations largely due to their incidental location. We find that both the number of firms and labour productivity are substantially higher in these provinces than in their synthetic counterparts.     

少数民族地区基层公务员晋升的影响因素研究——基于县处级正职领导干部的履历分析

由于自然环境、地理位置和历史等原因,我国少数民族地区经济社会发展长期落后于沿海发达地区,经济的"马太效应"直接波及到人才工作,反过来又制约了民族地区的经济社会发展。本文搜集并整理了西部G省L自治州2012年至今在任的226名县处级正职领导干部的简历,结合访谈与座谈的方式,从个人基本特征、从政经历和关系网络三个维度对影响少数民族地区基层公务员晋升的相关因素做了多元线性回归分析,剖析了我国少数民族地区基层公务员的晋升特点及规律,并提出了相关完善基层公务员晋升机制与干部人事制度改革的政策建议。     

Prevalence of Childhood Sexual Abuse in China: A Meta-Analysis

The objective of the current study was to explore the estimated prevalence of childhood sexual abuse in China. We conducted a meta-analysis that used the data from 36 articles. A total of 125 independent samples and 131,734 participants were included. The results revealed no significant difference in the prevalence of childhood sexual abuse between Chinese men (9.1%) and women (8.9%). The prevalence of childhood sexual abuse in studies from mainland areas was significantly higher than that from Hong Kong/Taiwan. The estimated prevalence of childhood sexual abuse in China also differed according to the definition of child sexual abuse, data collection method, year of data collection, and the mean age of participants at the time of assessment.     

Control Chart for Monitoring Autocorrelated Process with Multiple Exogenous Inputs

We propose to use AR-Sieve Bootstrap in the construction of a control chart of an autocorrelated process influenced by multiple exogenous inputs. The control charts are compared with Exponentially Weighted Moving Average (EWMA) control chart through a simulation study. AR-Sieve bootstrap control limits are narrower than EWMA control limits. While the proposed method yields a higher rate of false alarms, it is quick in detecting even minimal structural changes.     

Optimal control strategies for dividend payments and capital injections in compound Markov binomial risk model with penalties for deficits

We consider the compound Markov binomial risk model. The company controls the amount of dividends paid to the shareholders as well as the capital injections in order to maximize the cumulative expected discounted dividends minus the discounted capital injections and the discounted penalties for deficits prior to ruin. We show that the optimal value function is the unique solution of an HJB equation, and the optimal control strategy is a two-barriers strategy given the current state of the Markov chain. We obtain some properties of the optimal strategy and the optimal condition for ruining the company. We offer a high-efficiency algorithm for obtaining the optimal strategy and the optimal value function. In addition, we also discuss the optimal control problem under a restriction of bounded dividend rates. Numerical results are provided to illustrate the algorithm and the impact of the penalties.     

Does transformational leadership predict group emotional intelligence in work settings? / ¿Es el liderazgo transformacional un predictor de la inteligencia emocional grupal en los contextos laborales?

Contagion of emotions is a widely accepted characteristic of transformational leaders. However, the impact they may have on the Emotional Intelligence of their subordinates is an open question. In this paper, we analyse whether Transformational Leadership (LTF) perceptions influence the Emotional Intelligence of their groups (GEI). This is a novel approach within the actual interest on emotional intelligence and its role in group results. The participants were 272 subordinates from 52 groups that belonged to different private and public organizations in Spain. They completed a questionnaire including the variables of interest. Our study helps to clarify the relations between TFL perceptions and GEI, showing that TFL and GEI relate at the group level and that TFL is one of the predictors of the perception of GEI in work settings. Thus, the development of emotionally competent transformational leaders will produce emotionally competent groups that might increase their performance, efficiency and other processes (i.e., engagement).     

民国时期的社会转型、政权建设与族群关系

中华民国时期是中国历史中最复杂和最动荡的时代。贯穿民国38年历史的有三条主线。第一条主线是中国各族人民坚持反对帝国主义侵略的斗争;第二条主线是中华民国下属各民族维护国家统一、与帝国主义支持的国内分裂势力的斗争。这两条主线是晚清"救亡图存"斗争的延续。第三条主线是探索如何实现国家体制的政治转型,实现从"多元型帝国"向现代"民族国家"的体制过渡和国民思想过渡。在整个民国期间,帝国主义别有用心地向中国各族群输入"民族"意识,并扶植代理人。民国历史中,最核心的利益是救国图存,捍卫中华民族的独立和领土完整。在评价民国所有的历史人物时,这是一条最根本的底线。     

Missing value imputation method for disaster decision-making using K nearest neighbor

Due to destructiveness of natural disasters, restriction of disaster scenarios and some human causes, missing data usually occur in disaster decision-making problems. In order to estimate missing values of alternatives, this paper focuses on imputing heterogeneous attribute values of disaster based on an improved K nearest neighbor imputation (KNNI) method. Firstly, some definitions of trapezoidal fuzzy numbers (TFNs) are introduced and three types of attributes (i.e. linguistic term sets, intervals and real numbers) are converted to TFNs. Then the correlated degree model is utilized to extract related attributes to form instances that will be used in K nearest neighbor algorithm, and a novel KNNI method merging with correlated degree model is presented. Finally, an illustrative example is given to verify the proposed method and to demonstrate its feasibility and effectiveness.     

Brush Pen Follows the Mind and Artistic Creation of Animals is the Artist Himself ——On Li Pingye's freehand traditional Chinese ink painting

正Reading carefully of Li Pingye’s painting works with tiger being the main theme of creation,one will always feel a strong shocking force.This kind of feeling comes from two aspects.First,his works convey rich humanistic spirit connotation.Se cond,Mr.Li has a unique style of artistic language of overbearing Chinese ink painting.In the circle of