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Herein, an autocatalytic route to fabricate dual metal ion-equipped organic/inorganic hybrid silica, an ideal precursor for multifunctional silica-based composites integrated with well-dispersed Ag and Co3O4 nanoparticles was demonstrated. Significantly, by rational selection of reactants, such dual metal ion-equipped organic/inorganic hybrid silica can be(More)
Large-scale liquefaction features (e.g., sand blows, lateral-spread fissure vents) that can be recognized on remote-sensing imagery and photography have been of great utility in developing chronologies of paleo-earthquakes. In areas where large-scale features are obscured on imagery by forest cover and Holocene exposure is lacking, small-scale liquefaction(More)
This paper analyses the requirements of file protection. It proposes an improved role-based access control model, which is based on the analysis of shortcomings of traditional RBAC model. This model improves the traditional RBAC model, and importes the concept of user group and object role, also presentes the principal authorized the users and the roles.(More)
One of the threats to watermarking security is unauthorized removal. In this paper, a framework based on extended Trusted Computer Platform to solve this problem was presented. Using Trusted Computing Platform could enhance the security of watermarking detection. The TPM as a supervisor that control the watermark detection program and only the legal one can(More)
In this work, the direct determination of creatinine was achieved using a poly(ethyleneimine)/phosphotungstic acid multilayer modified electrode with the assistance of Copper(II) ions by cyclic voltammetry. The quantity of creatinine were determined by measuring the redox peak current of Cu(II)-creatinine complex/Cu(I)-creatinine complex. Factors affecting(More)
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