The effective operation of a design assurance system cannot be achieved without the effective performance of the independent supervision function.As one of the core functions of the design assurance system,the purpose...The effective operation of a design assurance system cannot be achieved without the effective performance of the independent supervision function.As one of the core functions of the design assurance system,the purpose of the independent supervision function is to ensure that the system operates within the scope of procedures and manuals.At present,the function of independent supervision is a difficult and confusing issue for various original equipment manufacturers as well as suppliers,and there is an urgent requirement to put forward relevant requirements and form relevant methods.Based on the above mentioned objective,the basic requirements of the independent supervision function of design assurance system were studied,the problems and deficiencies in the organization,staffing,and methods existing in the current independent supervision function were analyzed,the improvement suggestions and measures for the performance of the independent supervision function from the aspects of the organization,staffing,procedures,and suppliers were put forward.The present work and conclusions provide guidance and direction for the effective operation of the design assurance system.展开更多
With the rapidly developing of Internet of Things (IoT), the volume ofdata generated by IoT systems is increasing quickly. To release the pressure ofdata management and storage, more and more enterprises and individua...With the rapidly developing of Internet of Things (IoT), the volume ofdata generated by IoT systems is increasing quickly. To release the pressure ofdata management and storage, more and more enterprises and individuals preferto integrate cloud service with IoT systems, in which the IoT data can be outsourced to cloud server. Since cloud service provider (CSP) is not fully trusted,a variety of methods have been proposed to deal with the problem of data integritychecking. In traditional data integrity audition schemes, the task of data auditing isusually performed by Third Party Auditor (TPA) which is assumed to be trustful.However, in real-life TPA is not trusted as people thought. Therefore, theseschemes suffer from the underlying problem of single-point failure. Moreover,most of the traditional schemes are designed by RSA or bilinear map techniqueswhich consume heavy computation and communication cost. To overcome theseshortcomings, we propose a novel data integrity checking scheme for cloud-IoTdata based on blockchain technique and homomorphic hash. In our scheme, thetags of all data blocks are computed by a homomorphic hash function and storedin blockchain. Moreover, each step within the process of data integrity checking issigned by the performer, and the signatures are stored in blockchain through smartcontracts. As a result, each behavior for data integrity checking in our scheme canbe traced and audited which improves the security of the scheme greatly. Furthermore, batch-audition for multiple data challenges is also supported in our scheme.We formalize the system model of our scheme and give the concrete construction.Detailed performance analyses demonstrate that our proposed scheme is efficientand practical without the trust-assumption of TPA.展开更多
Whether auditors provide high-quality audit services has been a concern of academics for a long time, but it has not clear answer. In this paper the author studies this problem from the real basis of audit activities,...Whether auditors provide high-quality audit services has been a concern of academics for a long time, but it has not clear answer. In this paper the author studies this problem from the real basis of audit activities, in view of an endless stream of the performance of listed companies notice ＂change＂ phenomenon. The author finds that auditing is the important reasons of listed companies notice ＂change＂, auditor can improve disclosure quality, is the gatekeeper to accounting information. The author also finds that there may be exist collusion of listed company with auditor, SEC should enhance inspection of the implementation of listed companies notice of earnings.展开更多
目的:明确不同糖皮质激素给药途径对儿童分泌性中耳炎治疗效果及免疫功能的影响。方法:纳入分析2016年1月至2016年6月我院收治的儿童分泌性中耳炎患儿的临床资料。采用随机数字表法,将患儿随机分为观察组(鼓室内注射)及对照组(口服),并...目的:明确不同糖皮质激素给药途径对儿童分泌性中耳炎治疗效果及免疫功能的影响。方法:纳入分析2016年1月至2016年6月我院收治的儿童分泌性中耳炎患儿的临床资料。采用随机数字表法,将患儿随机分为观察组(鼓室内注射)及对照组(口服),并采用相应的糖皮质激素给药途径。治疗一周后对比两组听力恢复情况、外周血T细胞亚群和细胞因子变化及治疗后1年累积复发率。结果:共纳入观察组45例(45耳),对照组42(42耳)。两组患儿治疗后听力指标显著改善(P<0.05),且观察组优于对照组(P<0.05)。观察组患儿治愈率显著高于对照组(91.1%,41/45 vs 73.8%,31/42;χ~2=4.558,P=0.033)。治疗后两组患儿总CD3^+T、CD4^+T细胞及CD4^+T/CD8^+T均显著升高(P<0.05),而CD8^+T细胞显著降低(P<0.05),但观察组患儿变化显著优于对照组(P<0.05)。治疗后两组患儿Th2细胞因子IL-4、Th1细胞因子IFN-γ及IL-4/IFN-γ水平均显著降低(P<0.05),但观察组变化显著优于对照组(P<0.05)。观察组患儿治疗后1年累积复发率显著低于对照组(9.76%,4/41 vs 29.03%,9/31;Log-rank χ~2=4.698,P=0.030)。结论:儿童分泌性中耳炎治疗中,采用鼓室内注射糖皮质激素的治疗效果优于系统性给予糖皮质激素。展开更多
文摘The effective operation of a design assurance system cannot be achieved without the effective performance of the independent supervision function.As one of the core functions of the design assurance system,the purpose of the independent supervision function is to ensure that the system operates within the scope of procedures and manuals.At present,the function of independent supervision is a difficult and confusing issue for various original equipment manufacturers as well as suppliers,and there is an urgent requirement to put forward relevant requirements and form relevant methods.Based on the above mentioned objective,the basic requirements of the independent supervision function of design assurance system were studied,the problems and deficiencies in the organization,staffing,and methods existing in the current independent supervision function were analyzed,the improvement suggestions and measures for the performance of the independent supervision function from the aspects of the organization,staffing,procedures,and suppliers were put forward.The present work and conclusions provide guidance and direction for the effective operation of the design assurance system.
基金supported by Program for Scientific Research Foundation for Talented Scholars of Jinling Institute of Technology(No.JIT-B-202031)H.Yan received it and the URLs is www.jit.edu.cn.H.Yan also received the Opening Foundation of Fujian Provincial Key Laboratory of Network Security and Cryptology Research Fund of Fujian Normal University(NSCL-KF2021-02)and the URLs is www.fjnu.edu.cn.Y.Liu received the funding of the National Natural Science Foundation of China(No.61902163,)the URLs is www.nsfc.gov.cn.S.Hu received the funding of the Science and Technology Project of Education Department in Jiangxi Province(No.GJJ201402)and the URLs is www.gnnu.cn.
文摘With the rapidly developing of Internet of Things (IoT), the volume ofdata generated by IoT systems is increasing quickly. To release the pressure ofdata management and storage, more and more enterprises and individuals preferto integrate cloud service with IoT systems, in which the IoT data can be outsourced to cloud server. Since cloud service provider (CSP) is not fully trusted,a variety of methods have been proposed to deal with the problem of data integritychecking. In traditional data integrity audition schemes, the task of data auditing isusually performed by Third Party Auditor (TPA) which is assumed to be trustful.However, in real-life TPA is not trusted as people thought. Therefore, theseschemes suffer from the underlying problem of single-point failure. Moreover,most of the traditional schemes are designed by RSA or bilinear map techniqueswhich consume heavy computation and communication cost. To overcome theseshortcomings, we propose a novel data integrity checking scheme for cloud-IoTdata based on blockchain technique and homomorphic hash. In our scheme, thetags of all data blocks are computed by a homomorphic hash function and storedin blockchain. Moreover, each step within the process of data integrity checking issigned by the performer, and the signatures are stored in blockchain through smartcontracts. As a result, each behavior for data integrity checking in our scheme canbe traced and audited which improves the security of the scheme greatly. Furthermore, batch-audition for multiple data challenges is also supported in our scheme.We formalize the system model of our scheme and give the concrete construction.Detailed performance analyses demonstrate that our proposed scheme is efficientand practical without the trust-assumption of TPA.
文摘Whether auditors provide high-quality audit services has been a concern of academics for a long time, but it has not clear answer. In this paper the author studies this problem from the real basis of audit activities, in view of an endless stream of the performance of listed companies notice ＂change＂ phenomenon. The author finds that auditing is the important reasons of listed companies notice ＂change＂, auditor can improve disclosure quality, is the gatekeeper to accounting information. The author also finds that there may be exist collusion of listed company with auditor, SEC should enhance inspection of the implementation of listed companies notice of earnings.
文摘目的:明确不同糖皮质激素给药途径对儿童分泌性中耳炎治疗效果及免疫功能的影响。方法:纳入分析2016年1月至2016年6月我院收治的儿童分泌性中耳炎患儿的临床资料。采用随机数字表法,将患儿随机分为观察组(鼓室内注射)及对照组(口服),并采用相应的糖皮质激素给药途径。治疗一周后对比两组听力恢复情况、外周血T细胞亚群和细胞因子变化及治疗后1年累积复发率。结果:共纳入观察组45例(45耳),对照组42(42耳)。两组患儿治疗后听力指标显著改善(P<0.05),且观察组优于对照组(P<0.05)。观察组患儿治愈率显著高于对照组(91.1%,41/45 vs 73.8%,31/42;χ~2=4.558,P=0.033)。治疗后两组患儿总CD3^+T、CD4^+T细胞及CD4^+T/CD8^+T均显著升高(P<0.05),而CD8^+T细胞显著降低(P<0.05),但观察组患儿变化显著优于对照组(P<0.05)。治疗后两组患儿Th2细胞因子IL-4、Th1细胞因子IFN-γ及IL-4/IFN-γ水平均显著降低(P<0.05),但观察组变化显著优于对照组(P<0.05)。观察组患儿治疗后1年累积复发率显著低于对照组(9.76%,4/41 vs 29.03%,9/31;Log-rank χ~2=4.698,P=0.030)。结论:儿童分泌性中耳炎治疗中,采用鼓室内注射糖皮质激素的治疗效果优于系统性给予糖皮质激素。
