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To solve the parallelism algorithm of Petri network system with parallel feature and implementing paralleling control and execution of Petri network, we propose the analysis and algorithm design of Petri network process. Based on employing P-invariants to partition the function of Petri network system, we firstly analyzed the situations of parallelism between processes, checked the effects of the...
We study impact-ionization-induced electroluminescence (EL) from a GaAs/AlGaAs heterostructure under high bias. In addition to k-space transfer (the Gunn effect), EL spectra indicate real-space (GaAs-to-AlGaAs) transfer. Microscopy shows strong EL near the anode.
Considering the robustness and imperceptibility of digital image watermarking, this paper proposes an watermark embedding algorithm, in which watermark is embedded in DC coefficients derived from a dual DCT transformations. After block based DCT transformation, DC coefficients of an image are arranged into a new matrix, on which block based DCT transformation is performed again. Through abound empirical...
Web server plays an important role on the internet service. On Linux system, some web servers are designed based on the process mechanism. Every time when clients give a connection request, the server has to create a new process, resulting in a big cost of CPU. In this paper, we introduce a new concurrent web sever implemented with prethreading technology. It is designed by producer-consumer model...
The main purpose of the paper is to settle the stochastic linear quadratic control problem for systems with multiple input-delays (SDLQ) which is very intractable and remains to be solved. We introduce a different version of stochastic discrete-time maximum principle (SDMP) where it is shown that the auxiliary variable depends on the optimal system state through a stochastic matrix and the expectation...
Fundamental current and its positive, negative, and zero sequence components detection is the foundation of monitoring power system operation characteristic parameters. This paper presents a new method of examining fundamental current considering zero sequence components for three-phase four-wire system based on coordinate transformation. Combined with improved instantaneous symmetrical component...
Specialty English writing education, which aims to help students to train and develop students literacies and skills required for successful communication in English academic and professional contexts, is very important in china university students' academic studies. As witnessed by the popularity of sociocultural and constructivist approaches in language teaching, collaboration can play a vital role...
Photoplethysmogram (PPG) of pulse wave has been proposed for analgesia monitoring recently with most attentions paid to its magnitude and little attention to its morphology. Therefore, effect of nociceptive stimuli on the morphology of PPG was studied using a morphological parameter named area ratio (AR). Fifty patients, ASA I or II, scheduled for laparoscopy surgery under general anaesthesia were...
Thermally stimulated current (TSC) is developed and a new method for direct determination of trap level distribution in polymer film is proposed. In this method, a new function is defined to weight the contribution of a trap level to the current at any temperature. The demarcation energy is used to study the trap empty process. Analysis shows that only electrons with trap levels very close to the...
In this paper, a relatively specific teaching program was designed and put into practice. Its real effects on students were studied through using empirical methods. The results show that cooperative English learning in network environment can really improve studentspsila English listening proficiency and raise their autonomous learning awareness.
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