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In recent years, several protocols for password-based authenticated key exchange have been proposed. These protocols aim to be secure even though the sample space of passwords may be small enough to be enumerated by an off-line adversary. In Eurocrypt 2000, Bellare, Pointcheval and Rogaway (BPR) presented a model and security definition for authenticated… (More)
China is one of the richest countries in the world for the diversity of its biological resources. However, China has suffered serious losses of biological resources in recent years, due to the burgeoning growth of economic globalization, international trade, and technology exchange. This comment analyzes data from ports of Entry–Exit Inspection and… (More)
The paper presents a hybrid Broyden family method with global mesh refinement and high order discretization scheme because that this type methods are usually efficient and the high order discretization scheme could reduce the discretization error significantly. The method is then applied to pipeline isothermal simulation problems.
A study was carried out to study the accumulative levels and dynamic changes of organochlorine pesticides in human milk in Beijing from 1982 to 1998, and the effect of prohibition and restriction on the use of DDT and BHC (666) in China in 1983. The milk samples were collected from women during the lactation period in four districts of Beijing from 1982 to… (More)
OBJECTIVE To investigate the basic contents of organochlorine pesticides (DDT, BHC and HCB) in human milk of normal residents in Beijing urban areas. METHODS Through continuous survey on the trend of organochlorine contents in human milk since DDT and BHC pesticides were forbidden in use in 1983, and to evaluate the effects of this program, the required… (More)