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Two distinguishing features, inclining backward rotor disk and unpowered rotor, make fluid field of autorotating rotor in gyroplane level flight different from helicopter rotor in forward flight. Unsteady flow past autorotative rotor in gyroplane level flight is time-accurately simulated by solving URANS based on multi-block structured grid. The methods of the sliding mesh and the Full-Approximation...
Initial parameters are the main influence factors of training time in a specific artificial neural network (ANN) model of which the structure has been determined. Under the background of long-term reservoir operation of The Three Gorges, Back Propagation (BP) ANN models were built to obtain optimal operation rules. Simulation experiments were carried out to compare the difference of training times...
In this paper, we propose a fuzzy singular perturbed unified model which can be used in both continues-time domain and discrete-time domain. The sampling period should be the same order small amount of the singular perturbation parameter ε and ε≪ 1 in fuzzy singular perturbed systems. Hence, the unified model makes use of delta operator which takes numerical advantages in high speed sampling system...
The NPV approach to price the target enterprise of M&A has already been replaced by some contemporary perspectives such as real option perspective and game perspective, etc. In this paper, the dynamic analyses to price the target enterprise of M&A will be developed under stochastic surroundings, and the equilibrium price formula will be proposed by applying the famous offer-counteroffer Rubinstein...
K-coverage is a classic issue in wireless sensor network (WSN) deployment. Existing works typically assumes that every position in the monitoring field is covered by at least k sensor nodes at any given time. This may not always be necessary because certain events to be monitored will last only for a short period of time. Based upon such observation, we include the time dimension in the original k-coverage...
Though the price of M&A has already been studied based on classical NPV model, which is not adaptable for real uncertain situation. This paper presents a new approach of measuring the target enterprise value of M&A, consisting of two parts, one is measured by NPV model and another is measured by real options model, which can be integrated to calculate the target enterprise by introducing synergy...
At present, with the rapid development of Micro-electromechanical Systems(MEMS), micro devices are favored because of their low-cost and excellent performance. The research on the flow and heat transfer has become more and more active in micro motor and micro bearing often met in MEMS. For the micro-scale flow in MEMS, on the one hand, it is difficult to carry through thermal measure and physical...
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