资源与环境经济学本科专业的核心课程设计探微--基于美国91所高校类似专业的资料整理

资源与环境经济学是教育部新设本科专业,目前尚无明确的人才培养核心课程规定,国内高校也无先例可循。基于对美国91所样本高校资源与环境经济学相关专业的网络资料整理,结合对14所高校资源与环境经济学专业课程设置情况的重点考察,建议将资源与环境经济学本科专业的8门课程设置为核心课程,包括微观经济学、宏观经济学、计量经济学、发展经济学、资源经济学、环境经济学、资源与环境政策学、统计学。还指出应根据人才培养的不同目标设定人才培养的其他专业课程。     

铁矿石中铅、砷的X射线荧光光谱定性定量分析方法研究

采用无标样分析技术对铁矿石中的铅、砷含量进行了定性分析,对含有铅、砷的铁矿石进行了筛选。采用增量法制备含铅、砷铁矿系列标样,采用变化理论α系数法对基体效应进行校正,采用X射线荧光光谱法定量测定铁矿石中铅、砷的含量,由此拓展了铁矿石中元素的检测范围,能够满足日常监管检测的需要。     

Selection procedures in sports: Improving predictions of athletes’ future performance

The selection of athletes has been a central topic in sports sciences for decades. Yet, little consideration has been given to the theoretical underpinnings and predictive validity of the procedures. In this paper, we evaluate current selection procedures in sports given what we know from the selection psychology literature. We contrast the popular clinical method (predictions based on overall impressions of experts) with the actuarial approach (predictions based on pre-defined decision rules), and we discuss why the latter approach often leads to superior performance predictions. Furthermore, we discuss the “signs” and the “samples” approaches. Taking the prevailing signs approach, athletes’ technical-, tactical-, physical-, and psychological skills are often assessed separately in controlled settings. However, for predicting later sport performance, taking samples of athletes’ behaviours in their sports environment may result in more valid assessments. We discuss the possible advantages and implications of making selection procedures in sports more actuarial and sample-based.