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For isolated dc–dc power converters, the interwinding parasitic capacitance of the transformer is usually one of the main paths for common-mode (CM) noise. In order to simplify the CM noise analysis, this paper proposes a two-capacitor transformer winding capacitance model. The model is derived based on general conditions so it can be applied to different isolated converter topologies. A measurement...
The high switching frequencies of power converters always lead to severe radiated EMI. The modeling and analysis of the converter with undesired antenna such as input/output cables are very important for the research on radiation. This paper first develops the model for undesired antenna in converters and discusses its relationship with the radiated power. Then the antenna's interaction with converter...
The recent adoption of OpenCL programming model by FPGA vendors has realized the function portability of OpenCL workloads on FPGA. However, the poor performance portability prevents its wide adoption. To harness the power of FPGAs using OpenCL programming model, it is advantageous to design an analytical performance model to estimate the performance of OpenCL workloads on FPGAs and provide insights...
Iterative stencil algorithms find applications in a wide range of domains. FPGAs have long been adopted for computation acceleration due to its advantages of dedicated hardware design. Hence, FPGAs are a compelling alternative for executing iterative stencil algorithms. However, efficient implementation of iterative stencil algorithms on FPGAs is very challenging due to the data dependencies between...
For isolated DC-DC power converters, the inter-winding parasitic capacitance of the transformer is usually one of the main paths for common-mode (CM) noise. In order to simplify the CM noise analysis, this paper proposes a two-capacitor transformer winding capacitance model. The model is derived based on general conditions so it can be applied to different isolated converter topologies. A measurement...
Based on coupled-mode theory and circuit theory, this paper presents theoretical analysis of the power transfer efficiency for the 4-coil wireless power transfer system presented by scholars in Massachusetts Institute of Technology. The theoretical analysis results indicate that the coupled-mode theory and circuit theory can lead to the exact same set of formulas and optimal solutions in the power...
The image annotation and retrieval are significant for semantic image retrieval that needs to establish the relations between linguistic labels and images. So the probabilistic formulation for semantic labeling is introduced to solve them. In addition, relevance feedback can improve the retrieval performance efficiently in the content-based image retrieval (CBIR). In this paper, we proposed a new...
As the dedicated information system, scientific and technical information system plays an important role in work; the continuous updating and development of the system needs a scientific and systematic security structure to guide its secure administration and running. The article, which starts the research on the relevant issues with respect to the theory and technology of security structure of scientific...
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