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DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or(More)
A class of flexible manufacturing systems is modeled by timed Petri nets, and a new deadlock free scheduling method based on genetic algorithm and timed Petri net model is proposed. Under the framework of timed Petri nets model, the scheduling problem can be formulated as finding a feasible transition firing sequence to avoid the deadlock situation and to(More)
This study found that the ratio of Thiothrix eikelboomii to total bacterial concentrations (TH/TB) (%) was a better indicator of bulking incidents affecting effluent quality compared to absolute T. eikelboomii abundance alone. This was determined using a genus-specific Thiothrix quantitative PCR primer and probe set, which was developed in this study to(More)
The parameter design of main components of hydrauLic excavator, mostly based on the specific structure of the system, has bad universaLity. In order to find a method that is versatile and has simple calculation process, it is figured out that different kinds of hybrid power system have the same path in the transfer of energy. The distribution of energy is(More)
Dynamic simulation model of cobalt-rich crusts cracking process with water jet was estabLished and the cracking process was simulated with numerical calculation. With simulation research, cobalt-rich crusts water jet cracking mechanism is obtained. Simulation results show that during the cracking process, there is an initial crack in cobalt-rich crusts(More)
Beamforming technology is one of the key technologies of radio fuze, which can improve the fuze-warhead efficiency and the fuze anti-interference ability. This paper firstly researches two optimization methods to the algorithm according to the special requirements of the fuze antenna beamforming. The first is suppression to the former sidelobe of the beam(More)
A fault diagnosis method of rolling bearing based on BP neural network and time domain parameters of vibration signal was proposed to realize fast fault diagnosis. The input vectors of the BP neural network were skewness, kurtosis, peak and margin of vibration signal. The structure of the neural network was determined with simulation research. Gradient(More)
Cobalt-rich crusts cutting method of cutter with water jet is proposed to reduce cutter impact load. Finite element model of cutter cutting cobalt-rich crusts with water jet was estabLished and surface initial crack forming conditions of cobalt-rich crusts were simulated. Simulation results show when water jet pressure is less than compressive strength of(More)