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Automated test case generation from use cases in early development phase is of great benefit to system testing. The paper proposes IFA (interaction finite automaton), a state based model concentrating on formulizing a system's behaviors specified in use cases without knowing its internal structures. The algorithms for transformation from use cases to IFA and generating test cases from IFA are represented...
We theoretically study the group-delay characteristics of a silicon microring resonator based on the coupled mode theory, and experimentally demonstrate error-free operations of an on-chip delay line using a silicon-on-insulator (SOI) microring resonator with a 20-mum radius. Four signals of different modulation formats are examined at 5 Gb/s, including return-to-zero (RZ), carrier-suppressed return-to-zero...
The permanent magnet brushless DC motor speed control system (PMBDCSCS) is simple control, high power density and high performance, and used in many domains. The voltage inverter used widely in the PMBDCSCS operates commonly in the six PWM methods: H_PWM_L_PWM, ON_PWM, H_PWM_L_ON, H_ON_L_PWM, PWM_ON and PWM_ON_PWM. In this paper, the six PWM methods are introduced in theory and are compared in detail...
Location knowledge of sensor nodes in a network is essential for many tasks such as routing, cooperative sensing, or service delivery in ad hoc, mobile, or sensor networks, and it is hard to get the precision solution by traditional node localization algorithm, while genetic algorithm is an effective methodology for solving combinatorial optimization problems, so, in this paper, a real-coded version...
A novel control algorithm - fuzzy generalized predictive control (FGPC) algorithm for nonlinear systems is proposed. Fuzzy Gustafon-Kessel algorithm and weighted recursive least-square method are applied to identify the T-S model offline. The identified model is then combined with generalized predictive control algorithm to control non-linear systems. And the detailed steps of the algorithm have been...
We consider decoding orthogonal space-time block codes without channel state information at the receiver. We use the inherent structure of these codes and adapt the sphere decoding method previously used under perfect channel knowledge to efficiently detect transmitted symbols. The resulting performance is within 1.5 dB from that of coherent detection and the proposed method has low complexity in...
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