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Dual-tracer PET imaging may improve overall lesion detectability due to different tracer kinetics. However, separating two tracers in the mixed acquired data is difficult because of unknown individual activity change over time. We proposed an effective and robust method to separate two tracers dynamically, by introducing joint Patlak and Logan analysis in dual-tracer PET imaging. Several patients...
In dealing with the Semantic similarity of Chinese words, using Hownet would be a preferable popular method. But HowNet has its own shortcomings. First, most of the concepts in HowNet concern in explaining common terms, lacking of specialized vocabulary. Second, most of the concepts in HowNet are independent concepts and lack of compound concepts. In response to the above problems, we combine HowNet...
Most of ID-based signature schemes without trusted PKG are secure in the random oracle model. Design of ID-based signature schemes without trusted PKG which are efficient and provably secure in the standard model is suitable for applications. In this scheme, PKG is prevented from forging a legal user's signature because it only generates partial private key. The scheme is existentially unforgeable...
A rotating fan could produce noise of both broadband and discrete frequency. The discrete part typically consists of shaft frequency, blade passage frequency (BPF) and their higher harmonics. The shaft-order noise, which is mainly induced by unbalanced rotating, is often hard to be eliminated. In this paper, the rotating noise caused by geometric asymmetry is discussed and predicted. Analytic point...
The constrained Delaunay triangle algorithm has been researched thoroughly based on calculates geometry theory in the paper. In order to avoid degenerated phenomenon, five points of altogether the balls problem and the multi-spots co-plane problem causing the position error, the stochastic perturbation algorithm has been introduced into the algorithm. It can improve the quality of triangulable unit...
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