Weighted factor is given to access eontrol policies to express the importanceof policy and its effect on access control decision. According to this weighted access controlframework, a trustworthiness model for aceess ...Weighted factor is given to access eontrol policies to express the importanceof policy and its effect on access control decision. According to this weighted access controlframework, a trustworthiness model for aceess request is also given. In this model, we give themeasure of trustworthiness factor to access request- by using some idea of uncertainty reasoning ofexpert system, present and prove the parallel propagation formula of request trustworthiness factoramong multiple policies, and get thefinal trustworthiness factor to decide whether authorizing. Inthis model, authorization decision is given according to the calculation of request trustworthinessfactor, which is more understandable, more suitable for real requirement and more powerfulforsecurity enhancement than traditional methods. Meanwhile the finer access control granularity isanother advantage.展开更多
It is well known that the Two-step Weighted Least-Squares(TWLS) is a widely used method for source localization and sensor position refinement. For this reason, we propose a unified framework of the TWLS method for jo...It is well known that the Two-step Weighted Least-Squares(TWLS) is a widely used method for source localization and sensor position refinement. For this reason, we propose a unified framework of the TWLS method for joint estimation of multiple disjoint sources and sensor locations in this paper. Unlike some existing works, the presented method is based on more general measurement model, and therefore it can be applied to many different localization scenarios.Besides, it does not have the initialization and local convergence problem. The closed-form expression for the covariance matrix of the proposed TWLS estimator is also derived by exploiting the first-order perturbation analysis. Moreover, the estimation accuracy of the TWLS method is shown analytically to achieve the Cramér-Rao Bound(CRB) before the threshold effect takes place. The theoretical analysis is also performed in a common mathematical framework, rather than aiming at some specific signal metrics. Finally, two numerical experiments are performed to support the theoretical development in this paper.展开更多
目的:本文旨在通过分析日本、韩国、新加坡的体重管理政策,为完善我国体重健康管理及代谢性疾病防治体系提供国际经验。方法:基于慢性病创新照护框架(Innovative Care for Chronic Conditions Framework,ICCC),采用文献综述与政策分析...目的:本文旨在通过分析日本、韩国、新加坡的体重管理政策,为完善我国体重健康管理及代谢性疾病防治体系提供国际经验。方法:基于慢性病创新照护框架(Innovative Care for Chronic Conditions Framework,ICCC),采用文献综述与政策分析方法搜索日本、韩国和新加坡健康体重管理相关政策及文献并进行归纳,系统回顾分析相关策略和做法,并总结经验启示。结果:三个国家均构建了多层级协同治理体系:宏观层面通过立法保障、跨部门协作和多元筹资建立制度基础;中观层面依托全周期医保服务、多学科协作及智能信息系统提升管理效率,社区层面通过健康教育和环境改造营造支持氛围;微观层面则注重个性化干预和家庭参与以增强自我管理能力。结论:我国可借鉴邻国经验,建立多级联动的防控体系,强化基层卫生服务能力,完善医疗保障,推动从疾病治疗向健康管理的转型,构建具有中国特色的健康体重管理方案。展开更多
To evaluate the risk of highly pathogenic avian influenza （HPAI） in China's Mainland, a risk assessment framework was built. Risk factors were determined by analyzing the epidemic data using the brainstorming me...To evaluate the risk of highly pathogenic avian influenza （HPAI） in China's Mainland, a risk assessment framework was built. Risk factors were determined by analyzing the epidemic data using the brainstorming method; the analytic hierarchy process was designed to weigh risk factors, and the integrated multicriteria analysis was used to evaluate the final result. The completed framework included the risk factor system, data standards for risk factors, weights of risk factors, and integrated assessment methods. This risk assessment framework can be used to quantitatively analyze the outbreak and spread of HPAI in China's Mainland.展开更多
文摘Weighted factor is given to access eontrol policies to express the importanceof policy and its effect on access control decision. According to this weighted access controlframework, a trustworthiness model for aceess request is also given. In this model, we give themeasure of trustworthiness factor to access request- by using some idea of uncertainty reasoning ofexpert system, present and prove the parallel propagation formula of request trustworthiness factoramong multiple policies, and get thefinal trustworthiness factor to decide whether authorizing. Inthis model, authorization decision is given according to the calculation of request trustworthinessfactor, which is more understandable, more suitable for real requirement and more powerfulforsecurity enhancement than traditional methods. Meanwhile the finer access control granularity isanother advantage.
基金co-supported by the National Natural Science Foundation of China (Nos. 61201381, 61401513 and 61772548)the China Postdoctoral Science Foundation (No. 2016M592989)+1 种基金the Self-Topic Foundation of Information Engineering University, China (No. 2016600701)the Outstanding Youth Foundation of Information Engineering University, China (No. 2016603201)
文摘It is well known that the Two-step Weighted Least-Squares(TWLS) is a widely used method for source localization and sensor position refinement. For this reason, we propose a unified framework of the TWLS method for joint estimation of multiple disjoint sources and sensor locations in this paper. Unlike some existing works, the presented method is based on more general measurement model, and therefore it can be applied to many different localization scenarios.Besides, it does not have the initialization and local convergence problem. The closed-form expression for the covariance matrix of the proposed TWLS estimator is also derived by exploiting the first-order perturbation analysis. Moreover, the estimation accuracy of the TWLS method is shown analytically to achieve the Cramér-Rao Bound(CRB) before the threshold effect takes place. The theoretical analysis is also performed in a common mathematical framework, rather than aiming at some specific signal metrics. Finally, two numerical experiments are performed to support the theoretical development in this paper.
文摘目的:本文旨在通过分析日本、韩国、新加坡的体重管理政策,为完善我国体重健康管理及代谢性疾病防治体系提供国际经验。方法:基于慢性病创新照护框架(Innovative Care for Chronic Conditions Framework,ICCC),采用文献综述与政策分析方法搜索日本、韩国和新加坡健康体重管理相关政策及文献并进行归纳,系统回顾分析相关策略和做法,并总结经验启示。结果:三个国家均构建了多层级协同治理体系:宏观层面通过立法保障、跨部门协作和多元筹资建立制度基础;中观层面依托全周期医保服务、多学科协作及智能信息系统提升管理效率,社区层面通过健康教育和环境改造营造支持氛围;微观层面则注重个性化干预和家庭参与以增强自我管理能力。结论:我国可借鉴邻国经验,建立多级联动的防控体系,强化基层卫生服务能力,完善医疗保障,推动从疾病治疗向健康管理的转型,构建具有中国特色的健康体重管理方案。
文摘To evaluate the risk of highly pathogenic avian influenza （HPAI） in China's Mainland, a risk assessment framework was built. Risk factors were determined by analyzing the epidemic data using the brainstorming method; the analytic hierarchy process was designed to weigh risk factors, and the integrated multicriteria analysis was used to evaluate the final result. The completed framework included the risk factor system, data standards for risk factors, weights of risk factors, and integrated assessment methods. This risk assessment framework can be used to quantitatively analyze the outbreak and spread of HPAI in China's Mainland.
