近45年羊卓雍湖西部流域气候的变化特征初探

本文利用浪卡子站建站以来的年平均气温、降水量、蒸发量、最高气温、最低气温资料,运用统计方法来分析了近45年羊卓雍湖西部流域的年际和年代际变化。结果表明:近45年来,羊卓雍湖西部流域年平均气温、最高气温、最低气温呈显著的升高趋势,升幅分别为0.29℃/10a、0.1℃/10a、1.1℃/10a;年降水量表现为不显著的增加趋势,平均每10年增加3.8mm。     

广东省大学生身体素质发展水平的调查

通过对广东省高校学生身体素质发展水平的调查,初步分析了广东高校学生身体素质发展水平的变化及其影响因素,对实现高校体育目的任务的主要途径提出了反思。     

人体协调性水平的测量方法初探──对“敲击实验”方式进行人体协调性评价的可行性研究

为了探索一条量化评价人体协调性水平的方法,本文以反映人体节奏感水平的“敲击实验”方式作为测量手段,对测量结果进行数据处理、分析后,认为用此测量方法评价人体协调性水平是可行的,并据此做出了初步的评价标准。     

Cinema Demand in Spain: A Cointegration Analysis

In this paper we explain the decline in cinema attendance in Spain since 1968. We use a cointegration analysis to estimate an individual demand function for cinema, with annual data and in terms of average attendance per inhabitant. We find that cinema is a luxury good and that its demand is elastic with respect to its price. We also show that television acts as a deterrent with regard to cinema attendance. This revised version was published online in August 2006 with corrections to the Cover Date.     

中日麻将文化杂谈

麻将具有独特的文化符号的含义,而麻将文化的形成与历史背景和社会变革有着密切的关联。麻将在中国和在日本的发展差异很大,也是一个发人深省的问题,折射出国民性里面的某些东西。文章采用历史研究与文化人类学相结合的方法,立足于麻将的起源和在日本的传播进行分析论证,并描画出这种古代游戏在如今中国和日本的开展情况。     

The immediate impacts of preschool attendance on Turkish children’s mathematics achievement

This study was conducted to investigate the immediate impacts of preschool attendance on Turkish children’s mathematics achievement. The participants were 200 children who attended or did not attend preschool. The number and operation task and the geometric shapes sorting task were used as the data collection tools. The children who attended preschool performed significantly better on the number and operation task and the geometric shapes sorting task than the children who did not attend preschool. Indeed, the multivariate regression analysis demonstrated that preschool attendance is the most important predictor of the success of children in number and operation task and the geometric shapes sorting task.     

Meeting in school: Cultural diversity approaches of teachers and intergroup contact among ethnic minority and majority adolescents

This study investigated the associations between cultural diversity approaches endorsed by teachers and adolescents' positive and negative intergroup contact in schools. Participants were 984 adolescents (M_age = 14.66; 62.7% female; 24.8% ethnic minority) involved in a three-wave longitudinal study between 2019 and 2020. Results highlighted that perceived equal treatment by teachers was related to higher positive and lower negative contact over time. However, perceived support for contact and cooperation and interest of teachers in children's cultural background were not related to either positive or negative contact over time. Importantly, the results were replicated across ethnic minority and majority adolescents. This study provides novel insights into the key role that teachers can play in promoting cultural diversity approaches to facilitate harmonious intergroup interactions in schools.     

A stochastic multi-parameters divergence method for online auto-tuning of fractional order PID controllers

This paper presents a stochastic multi-parameters divergence method for online parameter optimization of fractional-order proportional–integral–derivative (PID) controllers. The method is used for auto-tuning without the need for exact mathematical plant model and it is applicable to diverse plant transfer functions. The proposed controller tuning algorithm is capable of adaptively responding to parameter fluctuations and model uncertainties in real systems. Adaptation skill enhances controller performance for real-time applications. Simulations and experimental observations are carried on a prototype helicopter model to confirm the performance improvements obtained by the online auto-tuning of fractional-order PID structure in laboratory conditions.