Generalized Active filter is formed of PWM voltage style inverter which is specially used to eliminate harmonics under 35th. It can compel the output voltage to be positive sequence voltage sotrce. It has the function...Generalized Active filter is formed of PWM voltage style inverter which is specially used to eliminate harmonics under 35th. It can compel the output voltage to be positive sequence voltage sotrce. It has the functions of effieient active filter and efficient negative filter. In addition, it can regulate reactive power continuously, quickly and flexibly so as to stabe the voltage and improve the load power factor. In this paper, we will mainly relate the theory of GAF, and prove the correctness of theoretical analysis and the prospect of generalized applications of the device by means of computer simulation.展开更多
Three main problems in system development and the plight of the system development are analyzed and discussed. Finally a practical and formalized method-object-oriented method is proposed to extncate the system develo...Three main problems in system development and the plight of the system development are analyzed and discussed. Finally a practical and formalized method-object-oriented method is proposed to extncate the system development from the predicament.展开更多
Taking the formulation of the Daqing Oil. fived five-year development plan as the background, this paper puts forward the concept of dynamic programming with aftereffects and gives the principle of suboptimality as it...Taking the formulation of the Daqing Oil. fived five-year development plan as the background, this paper puts forward the concept of dynamic programming with aftereffects and gives the principle of suboptimality as its approximate solution. By using this principle an oil field development subdynamic programming model has been made and the oil field development program based on this model has achieved obvious economic benefits.展开更多
文摘Generalized Active filter is formed of PWM voltage style inverter which is specially used to eliminate harmonics under 35th. It can compel the output voltage to be positive sequence voltage sotrce. It has the functions of effieient active filter and efficient negative filter. In addition, it can regulate reactive power continuously, quickly and flexibly so as to stabe the voltage and improve the load power factor. In this paper, we will mainly relate the theory of GAF, and prove the correctness of theoretical analysis and the prospect of generalized applications of the device by means of computer simulation.
文摘Three main problems in system development and the plight of the system development are analyzed and discussed. Finally a practical and formalized method-object-oriented method is proposed to extncate the system development from the predicament.
文摘Taking the formulation of the Daqing Oil. fived five-year development plan as the background, this paper puts forward the concept of dynamic programming with aftereffects and gives the principle of suboptimality as its approximate solution. By using this principle an oil field development subdynamic programming model has been made and the oil field development program based on this model has achieved obvious economic benefits.
