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We find the very eigenspaces where multipartite entanglement is more persistent than the bipartite entanglement and can even evolve into a specific constant in a model many-spin systems decohered by a thermal bath.
Cloud computing presents many promising technological and economical opportunities, however, it can pose a challenge for cybercrime investigation and digital forensics. Therefore, there is an urgent need to extend the applications of investigation processes in the Cloud. In this paper, we present the definition of cloud computing and its various models. Further we compare traditional forensic investigations...
In the parallel test process of aircraft electrical system, task scheduling is a complex problem at present. The paper presents an improved ant colony algorithm into the procedure of exploring test sequences, and establishes a cost constraint matrix model based on the theory of constraint matrix for the evaluation of scheduling. And the paper acquires the optimal scheduling with the least test cost...
The sensorless vector control method for the high speed Permanent Magnet Synchronous Machine (PMSM) used as integrated starter-generator (ISG) applied in the microturbine generation system (MTG) is investigated in depth in this paper. For its characteristic of high rotating speed and low inductance, an improved open-loop back-EMF estimation method is proposed to estimate the position and velocity...
Research and Development (R&D) is one major source of creating new knowledge and improving technology, and has a deep influence over economic development. Through a factor-analysis of the comprehensive indexes that compose economic growth, and through a regression analysis and a cluster analysis of R&D related data from 31 provinces in China, we found that the patent output of universities...
The leaf spring is the flexible component of dependent suspension, which has advantages of simple structure, convenient maintenance, low cost, and can be used to locate the axle. The traditional multi-leaf spring has various defects. The few-leaf-spring has been one of main development trend of leaf springs because of its excellent characteristics. In this paper, a few-leaf-spring with variable thickness...
Based on system dynamics theory and multi-agent technology, this paper creates an evaluation model of educational environment. Firstly we create student model and environment model with formal language, and then we discuss factors in educational environment and their relations and get some formulas to calculate education status of a student. At the end of this paper, we give the simulation results...
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