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When two-phase earthing fault occurs in different sections of a feeder in a distribution system, part of section switches may have two phase fault current flowing through and part of section switches may have one phase fault current flowing through. So, fault current characteristic of this kind of fault is different from that of interphase short circuit fault. Then the traditional matrix algorithm...
Traditional technology of experimental modal analysis bases on the known input and output signals, and utilizes integrated information of both the excitation and responses to identify the modal parameter. In most of the actual conditions, only the response data is measurable while excitations are unknown. Thus modal parameter must be extracted only from responses. In allusion to this limitation, this...
Shearlet transform which is based on a multiresolution analysis and built in the discrete framework provides efficient multiscale directional representations and yields approximately optimal representation properties. We employ the Laplacian model to describe the coefficients in shearlet domain, then in the MAP theory, a shearlet-based deblurring problem is equivalent to an optimization problem. Experimental...
In this study, effects of ionic radius, charge, and mass on the electro sorption desalination performance of activated carbon electrodes were investigated. The sorption capacity of carbon electrodes was approximately 0.08-0.18 mmol/g carbon. The electro sorption capacity of monovalent ions was higher than multivalent ions. Covering area of cation on electrode is smaller than anion, when considering...
This paper describes the Web services security issues. A solution for routing messages based on Axis2 is proposed. The message's efficiency problem in the transmission process is solved by building a middleware. Using the rampart module of Axis2, web service security is realized.
In this paper, we present a statistical analysis of six traffic features based on entropy and distinct feature number at the packet level, and we find that, although these traffic features are unstable and show seasonal patterns like traffic volume for a long period, they are stable and consistent with Gaussian distribution in a short time period. However, this equilibrium property will be violated...
Taking typical surrounding rock of the red-bed soft rock highway tunnel for example, two representative rock samples(mudstone and muddy siltstone) along the highway tunnel's surrounding rock are chosen to perform tests of compressive strength, by using the uniaxial compressive test and the point load test, the rock compressive strength characteristics under different weathering degree and water action...
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