The fuzzy integration evaluation method （FIEM） is studied in order to select the best orbital elements from the multi-group initial orbits determined by a satellite TT＆C （Tracking, Telemetry and Control） center w...The fuzzy integration evaluation method （FIEM） is studied in order to select the best orbital elements from the multi-group initial orbits determined by a satellite TT＆C （Tracking, Telemetry and Control） center with all kinds of data sources. By employing FIEM together with the experience of TT＆C experts, the index system to evaluate the selection of the best initial orbits is established after the data sources and orbit determination theories are studied. Besides, the concrete steps in employing the method are presented. Moreover, by taking the objects to be evaluated as evaluation experts, the problem of how to generate evaluation matrices is solved. Through practical application, the method to select the best initial orbital elements has been proved to be flexible and effective The originality of the method is to find a new evaluation criterion （comparing the actually tracked orbits） replacing the traditional one （comparing the nominal orbits） for selecting the best orbital elements.展开更多
An integrated evaluation system under randomness and fuzziness was developed in this work to systematically assess the risk of groundwater contamination in a little town, Central China. In this system, randomness of t...An integrated evaluation system under randomness and fuzziness was developed in this work to systematically assess the risk of groundwater contamination in a little town, Central China. In this system, randomness of the parameters and the fuzziness of the risk were considered simultaneously, and the exceeding standard probability of contamination and human health risk due to the contamination were integrated. The contamination risk was defined as a combination of "vulnerability" and "hazard". To calculate the value of "vulnerability", pollutant concentration was simulated by MODFLOW with random input variables and a new modified health risk assessment(MRA) model was established to analyze the level of "hazard". The limit concentration based on environmental-guideline and health risk due to manganese were systematically examined to obtain the general risk levels through a fuzzy rule base. The "vulnerability" and "hazard" were divided into five categories of "high", "medium-high", "medium", "low-medium" and "low", respectively. Then, "vulnerability" and "hazard" were firstly combined by integrated evaluation. Compared with the other two scenarios under deterministic methods, the risk obtained in the proposed system is higher. This research illustrated that ignoring of uncertainties in evaluation process might underestimate the risk level.展开更多
目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛...目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛选文献,按研究问题提取、分析和总结数据,对评价指标进行归纳分析。结果:最终纳入文献32篇,中文文献15篇,外文文献17篇;涉及3个理论模型、6种指导框架、5种选取方法、6种赋权方法。Donabedian三维质量模型(6.25%)和耦合协调度模型(6.25%)是使用较多的理论模型,文献研究法(53.13%)和德尔菲法(34.38%)分别是较多的评价指标选取方法和赋权方法;一级指标主要分为组织构架、资源配置和服务质量3类,二级指标中出现频次较高的分别是管理系统、卫生信息系统和患者满意度。结论:目前国内外医防协同评价指标尚不统一,且实证研究较少。今后应该构建一个系统而科学的医防协同评价指标体系,并通过实证研究验证和推行,以促进人民健康和生活质量的提高。展开更多
该文基于安全域理论提出一套较完整的区域综合能源系统(regional integrated energy system,RIES)安全预警流程。首先,建立RIES安全域模型并给出RIES安全边界计算方法,包括交流安全边界与直流安全边界。其次,介绍模糊推理与模糊综合评...该文基于安全域理论提出一套较完整的区域综合能源系统(regional integrated energy system,RIES)安全预警流程。首先,建立RIES安全域模型并给出RIES安全边界计算方法,包括交流安全边界与直流安全边界。其次,介绍模糊推理与模糊综合评判方法,用于预警中评估越限的严重程度。再次,提出RIES预警方法,能综合考虑系统N-0与N-1安全性从而发出预警或告警信号。该方法包括预警指标选取与评判、安全预警分级、预警原因分析、安全趋势预测等步骤。最后,用算例验证该方法的有效性。可知,该文提出的安全预警方法对于提升RIES的安全管控能力,具有一定应用价值。展开更多
基金This project was supported by the Evaluate Quality of Satellite TT&C Mission(C0112)
文摘The fuzzy integration evaluation method （FIEM） is studied in order to select the best orbital elements from the multi-group initial orbits determined by a satellite TT＆C （Tracking, Telemetry and Control） center with all kinds of data sources. By employing FIEM together with the experience of TT＆C experts, the index system to evaluate the selection of the best initial orbits is established after the data sources and orbit determination theories are studied. Besides, the concrete steps in employing the method are presented. Moreover, by taking the objects to be evaluated as evaluation experts, the problem of how to generate evaluation matrices is solved. Through practical application, the method to select the best initial orbital elements has been proved to be flexible and effective The originality of the method is to find a new evaluation criterion （comparing the actually tracked orbits） replacing the traditional one （comparing the nominal orbits） for selecting the best orbital elements.
基金Projects(51039001,51009063) supported by the National Natural Science Foundation of ChinaProject(SX2010-026) supported by State Council Three Gorges Project Construction Committee Executive Office,China+1 种基金Project(2012BS046) supported by Henan University of Technology,ChinaProject(BYHGLC-2010-02) supported by the Guangzhou Water Authority,China
文摘An integrated evaluation system under randomness and fuzziness was developed in this work to systematically assess the risk of groundwater contamination in a little town, Central China. In this system, randomness of the parameters and the fuzziness of the risk were considered simultaneously, and the exceeding standard probability of contamination and human health risk due to the contamination were integrated. The contamination risk was defined as a combination of "vulnerability" and "hazard". To calculate the value of "vulnerability", pollutant concentration was simulated by MODFLOW with random input variables and a new modified health risk assessment(MRA) model was established to analyze the level of "hazard". The limit concentration based on environmental-guideline and health risk due to manganese were systematically examined to obtain the general risk levels through a fuzzy rule base. The "vulnerability" and "hazard" were divided into five categories of "high", "medium-high", "medium", "low-medium" and "low", respectively. Then, "vulnerability" and "hazard" were firstly combined by integrated evaluation. Compared with the other two scenarios under deterministic methods, the risk obtained in the proposed system is higher. This research illustrated that ignoring of uncertainties in evaluation process might underestimate the risk level.
文摘目的:查找、筛选、描述和分析国内外医防协同评价指标,为构建适合国内医防协同评价体系提供理论依据和参考。方法:通过检索Web of Science核心库和中国知网从建库到2024年5月31日关于医防协同评价指标的相关文献,制定纳入和排除标准筛选文献,按研究问题提取、分析和总结数据,对评价指标进行归纳分析。结果:最终纳入文献32篇,中文文献15篇,外文文献17篇;涉及3个理论模型、6种指导框架、5种选取方法、6种赋权方法。Donabedian三维质量模型(6.25%)和耦合协调度模型(6.25%)是使用较多的理论模型,文献研究法(53.13%)和德尔菲法(34.38%)分别是较多的评价指标选取方法和赋权方法;一级指标主要分为组织构架、资源配置和服务质量3类,二级指标中出现频次较高的分别是管理系统、卫生信息系统和患者满意度。结论:目前国内外医防协同评价指标尚不统一,且实证研究较少。今后应该构建一个系统而科学的医防协同评价指标体系,并通过实证研究验证和推行,以促进人民健康和生活质量的提高。
文摘该文基于安全域理论提出一套较完整的区域综合能源系统(regional integrated energy system,RIES)安全预警流程。首先,建立RIES安全域模型并给出RIES安全边界计算方法,包括交流安全边界与直流安全边界。其次,介绍模糊推理与模糊综合评判方法,用于预警中评估越限的严重程度。再次,提出RIES预警方法,能综合考虑系统N-0与N-1安全性从而发出预警或告警信号。该方法包括预警指标选取与评判、安全预警分级、预警原因分析、安全趋势预测等步骤。最后,用算例验证该方法的有效性。可知,该文提出的安全预警方法对于提升RIES的安全管控能力,具有一定应用价值。
