Internet of things has been widely applied to industrial control, smart city and environmental protection, in these applica- tion scenarios, sensing node needs to make real-time response to the feedback control of the...Internet of things has been widely applied to industrial control, smart city and environmental protection, in these applica- tion scenarios, sensing node needs to make real-time response to the feedback control of the application layer. Therefore, it is nec- essary to monitor whether or not awareness nodes are trusted in real time, but the existing mechanisms for trusted certification lack the real-time measurement and tracking of the sensing node. To solve the above problems, this paper proposes a dynamic metric based authentication mechanism for sensing nodes of Internet of things. Firstly, the dynamic trustworthiness measure of the sensing nodes is carried out by introducing the computational function such as the trust function, the trust- worthiness risk assessment function, the feed- back control function and the active function of the sensing node. The dynamic trustworthi- ness measure of sensing nodes from multiple dimensions can effectively describe the change of trusted value of sensing nodes. Then, on the basis of this, a trusted attestation based on node trusted measure is realized by using the revocable group signature mechanism of local verifier. The mechanism has anonymity, un- forgeability and traceability, which is proved the security in the standard model. Simulationexperiments show that the proposed trusted attestation mechanism is flexible, practical and ef｜Scient and has better attack resistance. It can effectively guarantee the reliable data transmission of nodes and realize the dynamic tracking of node reliability, which has a lower impact on system performance.展开更多
2-Chloro-5-chloromethylpyridine is a crucial intermediate of pesticides.Its solid-liquid equilibrium data will provide essential support for industrial design and further theoretical studies.The solubilities of 2-chlo...2-Chloro-5-chloromethylpyridine is a crucial intermediate of pesticides.Its solid-liquid equilibrium data will provide essential support for industrial design and further theoretical studies.The solubilities of 2-chloro-5-chloromethylpyridine in water,methanol,ethanol,ethyl acetate,acetone,trichloromethane and toluene at different temperatures were measured using the synthetic method by a laser monitoring observation technique. The solubility data were correlated with the modified Apelblat equation and Wilson equation.The calculated values were in good agreement with the experimental values.展开更多
On Jan. 1 st, 2007, Chinese public companies commenced the implementation of one basic and 38 specific accounting standards. A significant feature of these new standards is their focus on fair value （FV） and fair va...On Jan. 1 st, 2007, Chinese public companies commenced the implementation of one basic and 38 specific accounting standards. A significant feature of these new standards is their focus on fair value （FV） and fair value measurement （FVM）. Company interviews and training sessions designed to promote understanding of the new accounting regime have revealed a number of problems relating to both theoretical understanding and practical application. This paper proceeds as follows. It commences with a discussion of the development of FV and FVM concepts by examining IAS 39, FAS 157, FAS 159 and CAS. There follows an analysis of the current status of FV and FVM theory and application. The paper concludes with an exploration of some related problems arising within the FV theoretical framework and its practical application.展开更多
Karl Marx （1973） scientifically predicted the appearance of some extraordinary tendencies of social development in the second half of the 20th century was given a common name of post-industrial or informational soci...Karl Marx （1973） scientifically predicted the appearance of some extraordinary tendencies of social development in the second half of the 20th century was given a common name of post-industrial or informational society and interpreted as post-bourgeois, post-capitalist, post-business society, and late capitalism. Autonomist Marxism and Perm philosophy school had separately come to a conclusion that all the phenomena noticed by the post-industrial theory could be adequately explained if we consider the historically new form of material labour appearing now. Marx （1973）, who predicted this new form, named it automated, scientific, or universal labour. With the appearance of the universal labour, the wealth of the society depends on the universal human powers that help to involve the extensive powers of nature into the production process. Universal labour can not be averaged or measured by the labour time as the abstract labour; it implies high complexity and creativity. Involving increasingly powerful forces of nature and human society, it appears to be the labour of another essence and by its essence, it does not create value.展开更多
基金supported by the National Natural Science Foundation of China (The key trusted running technologies for the sensing nodes in Internet of things: 61501007, The research of the trusted and security environment for high energy physics scientific computing system: 11675199)General Project of science and technology project of Beijing Municipal Education Commission: KM201610005023+2 种基金the outstanding personnel training program of Beijing municipal Party Committee Organization Department (The Research of Trusted Computing environment for Internet of things in Smart City: 2014000020124G041)The key technology research and validation issue for the emergency treatment telemedicine public service platform which integrates the military and civilian and bases on the broadband wireless networks (No.2013ZX03006001-005)the issue belongs to Major national science and technology projects
文摘Internet of things has been widely applied to industrial control, smart city and environmental protection, in these applica- tion scenarios, sensing node needs to make real-time response to the feedback control of the application layer. Therefore, it is nec- essary to monitor whether or not awareness nodes are trusted in real time, but the existing mechanisms for trusted certification lack the real-time measurement and tracking of the sensing node. To solve the above problems, this paper proposes a dynamic metric based authentication mechanism for sensing nodes of Internet of things. Firstly, the dynamic trustworthiness measure of the sensing nodes is carried out by introducing the computational function such as the trust function, the trust- worthiness risk assessment function, the feed- back control function and the active function of the sensing node. The dynamic trustworthi- ness measure of sensing nodes from multiple dimensions can effectively describe the change of trusted value of sensing nodes. Then, on the basis of this, a trusted attestation based on node trusted measure is realized by using the revocable group signature mechanism of local verifier. The mechanism has anonymity, un- forgeability and traceability, which is proved the security in the standard model. Simulationexperiments show that the proposed trusted attestation mechanism is flexible, practical and ef｜Scient and has better attack resistance. It can effectively guarantee the reliable data transmission of nodes and realize the dynamic tracking of node reliability, which has a lower impact on system performance.
文摘2-Chloro-5-chloromethylpyridine is a crucial intermediate of pesticides.Its solid-liquid equilibrium data will provide essential support for industrial design and further theoretical studies.The solubilities of 2-chloro-5-chloromethylpyridine in water,methanol,ethanol,ethyl acetate,acetone,trichloromethane and toluene at different temperatures were measured using the synthetic method by a laser monitoring observation technique. The solubility data were correlated with the modified Apelblat equation and Wilson equation.The calculated values were in good agreement with the experimental values.
文摘On Jan. 1 st, 2007, Chinese public companies commenced the implementation of one basic and 38 specific accounting standards. A significant feature of these new standards is their focus on fair value （FV） and fair value measurement （FVM）. Company interviews and training sessions designed to promote understanding of the new accounting regime have revealed a number of problems relating to both theoretical understanding and practical application. This paper proceeds as follows. It commences with a discussion of the development of FV and FVM concepts by examining IAS 39, FAS 157, FAS 159 and CAS. There follows an analysis of the current status of FV and FVM theory and application. The paper concludes with an exploration of some related problems arising within the FV theoretical framework and its practical application.
文摘Karl Marx （1973） scientifically predicted the appearance of some extraordinary tendencies of social development in the second half of the 20th century was given a common name of post-industrial or informational society and interpreted as post-bourgeois, post-capitalist, post-business society, and late capitalism. Autonomist Marxism and Perm philosophy school had separately come to a conclusion that all the phenomena noticed by the post-industrial theory could be adequately explained if we consider the historically new form of material labour appearing now. Marx （1973）, who predicted this new form, named it automated, scientific, or universal labour. With the appearance of the universal labour, the wealth of the society depends on the universal human powers that help to involve the extensive powers of nature into the production process. Universal labour can not be averaged or measured by the labour time as the abstract labour; it implies high complexity and creativity. Involving increasingly powerful forces of nature and human society, it appears to be the labour of another essence and by its essence, it does not create value.
