长江禁捕补偿政策满意度影响因素及提升策略研究:模糊集定性比较分析

目的 长江禁捕补偿政策的实施是我国贯彻“生态优先,绿色发展”理念的重要举措,探究退捕渔民对禁捕补偿政策满意度影响因素有利于政策主观绩效的提升。方法 文章以在全国率先实施禁捕补偿政策的贵州赤水河流域和湖北洪湖流域的退捕渔民为研究对象,运用模糊集定性比较分析方法（fuzzy set qualitative comparative analysis, fsQCA）探究禁捕补偿政策满意度的影响因素。结果 （1）政策认同和生计结果的缺失分别为解释禁捕补偿政策高满意度和低满意度的必要条件。（2）存在引致高禁捕补偿政策满意度的两种条件组态,其中补贴时效和信息掌握是影响禁捕补偿政策满意度的关键因素,在提高禁捕政策满意度中发挥核心作用;（3）存在4种引致低禁捕补偿政策满意度的条件组态,补贴时效和信息掌握的缺失在各自组态中均发挥了核心作用,使补贴时效和信息掌握的重要性得到进一步验证。（4）根据条件因素的可控性,加强政策的宣传力度和提高补偿资金发放时效是有效提升禁捕补偿政策满意度的最佳策略。结论 多重条件间并发协同效应的存在揭示禁捕补偿政策满意度影响因素的复杂性,对政策宣传和补偿资金发放工作“两手抓”是提高禁捕补偿政策满意度的必然选择。     

橡胶拉伸永久变形的测试

文章介绍了永久变形的发生机理,拉伸和压缩永久变形的差异及应用现状,拉伸和压缩永久变形测试在实际应用中的差别以及拉伸永久变形测试的必要性,拉伸永久变形对伸张疲劳性能的影响等,说明了在实际应用中不能忽视拉伸永久变形测试,并建议尽快建立相关的国家标准。     

A supplier evaluation model based on customer demand in blockchain tracing anti-counterfeiting platform project management

This study assesses supplier selection at the beginning of project management to establish an evaluation system corresponding to blockchain tracing anti-counterfeiting platforms (BTAP). First, this paper determines 20 evaluation criteria from the four dimensions of platform overview, core technology, application support, and operations management. On this basis, multi-criteria decision making (MCDM) based on customer needs is proposed, which consists of three main steps. First, quality function deployment (QFD) and the best and worst method (BWM) are used to evaluate the four dimensions of the BTAP and specific evaluation criteria from the perspective of customers to obtain the criteria weight. Then, this method uses the extended Vlse Kriterjumska Optimizacija I Kompromisno Resenje (VIKOR) approach to sort the alternatives. Finally, the improved decision making trial and evaluation laboratory (DEMATEL) method is used to analyse the relationships between the 20 criteria in the four dimensions. The feasibility and effectiveness of this method are verified by an example. According to the sensitivity analysis and comparative analysis, the results show that this method can evaluate blockchain anti-counterfeiting enterprises. The main conclusions are as follows: the core technology is the most important factor influencing the choice of a BTAP project, and the role of application support in evaluation cannot be ignored.     

基于直觉模糊的医院患者满意度研究

医院患者满意度综合反映了医院医疗服务水平。文章基于直觉模糊集理论建立了一个多级直觉模糊满意度计算模型,利用直觉模糊集算子有效地诱导出直觉模糊满意度,将定性与定量的方法结合起来进行满意度计算,使计算结果信息量更大、更加科学合理且自动化程度高。以商洛职业技术学院附属医院为例,通过问卷调查数据,基于直觉模糊满意度模型,计算医院患者满意度。探索一些指标满意度较低的原因;并针对患者普遍不满意的指标提出具体建议。     

Forecasting value at risk and expected shortfall with mixed data sampling

I propose applying the Mixed Data Sampling (MIDAS) framework to forecast Value at Risk (VaR) and Expected shortfall (ES). The new methods exploit the serial dependence on short-horizon returns to directly forecast the tail dynamics of the desired horizon. I perform a comprehensive comparison of out-of-sample VaR and ES forecasts with established models for a wide range of financial assets and backtests. The MIDAS-based models significantly outperform traditional GARCH-based forecasts and alternative conditional quantile specifications, especially in terms of multi-day forecast horizons. My analysis advocates models that feature asymmetric conditional quantiles and the use of the Asymmetric Laplace density to jointly estimate VaR and ES.     

高职物流管理专业(港口与航运方向)课程体系研究——以新里程(天津)公司工作过程岗位技能为导向

以工作过程岗位技能为导向的课程体系设置是严谨的过程,需要在对实体企业的实际工作岗位技能进行调研后,才能展开具体课程设置。文章通过对新里程(天津)公司工作过程岗位技能进行数月调研后,根据该企业部门岗位职能拟定出高职物流管理专业(港口与航运方向)课程体系。     

基于Mi^Xi/Di/∞排队群的订单装配优化模型与算法

本文将Mi^Xi/Di/∞排队群引入供应链的订单装配模型中,采用启发式算法研究了稳态下基于组件基本存货水平、组件立即满足率的组件拖欠成本和持有成本的优化问题,从而找出了最优的组件基本存货水平,并给出了相应的数值例子.     

基于混合集合规划的多场景应急设施选址优化

多场景应急设施选址问题具有约束复杂、时效性强、规划周期短等特点。以混合集合规划为算法框架的自然约束语言NCL能对该问题进行建模与求解。以一个典型多场景应急设施选址问题为例,证明了NCL可有效求解该类问题。     

CAD中图层图块在机械图样中的应用

以法兰盘零件图为例,描述了图层、图块的功能,同时描述了图层设置方法,图块设置方法。探讨了绘制零件图时图层、图块应用方法与技巧。     

论文检索系统及检索算法设计

针对文献检索这一问题,文章共设计了字母分类-相关度模型、ASCⅡ码分类-相关度模型两个模型。字母分类-相关度模型运用了字母分类法对所有的文献进行分类,并引入了相关度的概念,比较人性化的给出了不同相关度的检索结果,较为全面。ASCⅡ码分类-相关度模型运用了ASCⅡ分类法对文献进行了分类,将关键词库转化为一个阿拉伯数字集进行检索。