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Base bleed propellant is an important component of the increasing rang projectile using base bleed technology. Unsteady strongly combustion leads to extinguish, reignition or critical state which produce an effect on rang dispersion. The burning behavior is determined by the initial pressure of combustion chamber and the maximum pressure decay rate, which was investigated by simulation experimental...
For better manipulability, a criterion in the form of a quadratic function is presented for the self-motion planning (SMP) of redundant manipulators with no target-configuration assigned. Such SMP scheme could automatically select the desirable configuration so that the manipulator could be more flexible and maneuverable. As physical limits generally exist in actual redundant manipulators, both joint...
A nonlinear prediction model has been presented of PSO-ANN of monthly precipitation in rain season. It differs from traditional prediction modeling in the following aspects: (1) input factors of the PSO-ANN model of monthly precipitation were selected from a large quantity of preceding period high correlation factors, and they were also highly information-condensed by using the empirical orthogonal...
Following the thinking clue of the ensemble prediction in numerical weather prediction (NWP), a novel nonlinear artificial intelligence ensemble prediction (NAIEP) model for calculation wind speed of Mountain Darong in Guangxi has been developed based on the multiple neural networks with identical expected output created by using the genetic algorithm (GA) of evolutionary computation. The results...
In this paper, a scheme is proposed and investigated for the self-motion planning of PUMA560 robot arm, a functionally redundant manipulator (if the end-effector positioning is only considered). As joint physical constraints always exist in robot arms, we incorporate both the joint angle limits and joint velocity limits into the self-motion planning scheme as well. This scheme is formulated as a quadratic...
In this paper a model for temperature field analysis is established by FEM (finite element method) and computer aided thermal simulation soft with regard to such factors affecting temperature as heat generation, heat diffusion manner and direction, ratio of length and width of component, thickness of PCB and so on. And the artificial nerve network method for components layout optimization is applied...
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