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Resource demands prediction has become a promising tool to facilitate automatic scaling of resource management, which makes it feasible to reduce the cost and improve resource utilization in the cloud. Most current prediction methods of resource demands are based on a single model. However, the resource load patterns are usually diversity and variability in the cloud, it is hard to get the satisfactory...
A voltage source converter (VSC) based high temperature superconducting (HTS) magnetic energy storage system (SMES) has been optimal designed and constructed by China Electric Power Research Institute (CEPRI). This SMES uses two kinds of high temperature superconductors, YBCO and BSCCO tapes for the first time. The application planning of SMES with the equivalent capacity in a practical renewable...
The structural designs of the ITER FW/shield blanket components take into account proper dissipation of the transient electromagnetic (EM) forces, and thus reduce the impact of those forces. In this paper we analyze how the blanket/electrical strap components react to EM forces and evaluate whether the design complies with the SDC-IC criteria under the envisioned fault conditions. Specifically, analyses...
HTS Cable termination as an important component of HTS Cable is to connect the HTS Cable and Outer terminal. The main components of HTS cable termination are current lead, electrical insulator, cryostat and Liquid Nitrogen. To development and test of HTS cable termination, the electrical field analysis, cryostat design and high voltage test technologies are needed. It is developed and tested of a...
Pattern recognition is one of the most popular topics in the world today. One of its problems is reducing sample variation for the same class and keeping discrimination for different classes. Principal component analysis (PCA) is a multivariate technique that analyzes a data table in which observations are described by several inter-correlated quantitative dependent variables. Its goal is to extract...
The electrode displacement signal of resistance spot welding process is monitored and mapped into a 15×25 element bipolarized matrix by means of some method of fuzzy theory. The electrode displacement pattern matrixes from different welding current are treated as gene to construct chromosome. The genetic K-means algorithm (GKA), which combines the simplicity of the K-means algorithm and the robust...
In superconducting magnetic energy storage system (SMES), the current lead is the conductor that connects the room-temperature power supply and the low-temperature cryogenic superconducting magnet. It is the main source of thermal leakage in the system. In order to decrease the thermal leakage, it is necessary to analyze the thermal loss of the current lead and optimize the lead dimension. Because...
In superconducting electric equipments, the current lead connects the room-temperature power supply and the low-temperature superconducting magnet. It is the main source of thermal leakage in the system. In order to decrease the thermal leakage, it is necessary to analyze the thermal loss of current lead. The heat leakage analysis and optimization design of 35kV/2kA current lead are presented in this...
Beampattern synthesis is an important topic in array signal processing. Most of the beampattern synthesis methods are based on quadratic optimization with linear or quadratic constraints. In this paper, we show that a variety of array pattern synthesis problems can be expressed as convex optimization problems, which can be numerically solved with great efficiency by the recently developed interior-point...
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