Evaluating tourist risks from fuzzy perspectives

Since little effort has been devoted to measuring tourist risk from epistemology perspectives, this study develops a scientific framework for its evaluation. Tourist risk is defined as what is perceived by the tourists during the process of a group package tour. This in turn depends on the traveling service conditions experienced during the process and at the destination. The study uses an Analytic Hierarchy Process method to determine the weighting of various risk evaluation criteria. It further considers the possibility of “fuzzy logic” in making subjective judgments, and applies a Fuzzy Multiple Criteria Decision-Making method to conduct the evaluation of tourist risk.     

PHA-LEC法在建筑施工方案安全评价中的应用研究

介绍了预先危险性分析法（PHA）与作业条件危险性评价法（LEC）结合的应用步骤、实现方法;用LEC法确定PHA的危险等级。并以建筑施工为例,具体说明了PHA-LEC法在建筑安全评价中的应用。     

工艺危害分析在带压拖动压裂工艺中的应用

带压拖动压裂技术是在井口有压力条件下,依靠专用设备和特殊工具所进行的不放喷、不反冲,带压拖动井内压裂管柱、缩短施工时间的油井水平井压裂新技术。带压拖动压裂工艺技术采取带压调整钻具的方法,缩短了压裂施工换层时间,降低了井控、环境风险,但施工过程中存在井口压力高、堵塞器失效、管柱易卡等风险,工艺尚不成熟。通过工艺危害分析对该新工艺进行风险危害分析与评估、实施相应的保护措施,确保了新工艺施工安全。