In this article,an approach for economic performance assessment of model predictive control(MPC) system is presented.The method builds on steady-state economic optimization techniques and uses the linear quadratic Gau...In this article,an approach for economic performance assessment of model predictive control(MPC) system is presented.The method builds on steady-state economic optimization techniques and uses the linear quadratic Gaussian(LQG) benchmark other than conventional minimum variance control(MVC) to estimate the potential of reduction in variance.The LQG control is a more practical performance benchmark compared to MVC for performance assessment since it considers input variance and output variance,and it thus provides a desired basis for determining the theoretical maximum economic benefit potential arising from variability reduction.Combining the LQG benchmark directly with benefit potential of MPC control system,both the economic benefit and the optimal operation condition can be obtained by solving the economic optimization problem.The proposed algorithm is illustrated by simulated example as well as application to economic performance assessment of an industrial model predictive control system.展开更多
With the advent of economic globalization and the information age increasingly competitive market, facing tough competition in the market, an enterprise in order to gain competitive advantages, to survive and develop,...With the advent of economic globalization and the information age increasingly competitive market, facing tough competition in the market, an enterprise in order to gain competitive advantages, to survive and develop, we must continue to improve its overall efficiency and performance. Practice has proved an effective way to improve performance is a performance management.展开更多
In this paper, we conduct research on the applications of humanism management thoughts and positive incentive on contemporary enterprise management activities. The success or failure of an enterprise, it has connected...In this paper, we conduct research on the applications of humanism management thoughts and positive incentive on contemporary enterprise management activities. The success or failure of an enterprise, it has connected with the enterprise staff. Modem enterprise to make the enterprise in the competitive market of the brand is enduring, its survival is to be active play to the initiative, enthusiasm and creativity of employees, emphasizing the subject status of the employees and the leading role which is to emphasize the importance of basic management in enterprise management. Our research provides managers with the state-of-the-art methodology of management which will enhance the overall performance and the efficiency of business operating.展开更多
A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle (ORC).A series of tests were executed to examine the performance of the machine.In the experiment,the...A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle (ORC).A series of tests were executed to examine the performance of the machine.In the experiment,the machine was tested under different inlet pressure conditions (0.2-0.5 MPa).Data such as the compressed air pressure,temperatures of the inlet and the outlet,rotational speed,and electric power generation were analyzed to discover underlying relationships.During the test,the rotational speed of the machine reached as high as 54 000 r/min,the peak value of the temperature drop between the inlet and the outlet reached 42 ℃,the maximum electric power generated by the motor-generator attached to the machine reached 630 W,and the efficiency of the machine reached 0.43.展开更多
基金Supported by the National Creative Research Groups Science Foundation of China （60421002） and National Basic Research Program of China （2007CB714000）.
文摘In this article,an approach for economic performance assessment of model predictive control(MPC) system is presented.The method builds on steady-state economic optimization techniques and uses the linear quadratic Gaussian(LQG) benchmark other than conventional minimum variance control(MVC) to estimate the potential of reduction in variance.The LQG control is a more practical performance benchmark compared to MVC for performance assessment since it considers input variance and output variance,and it thus provides a desired basis for determining the theoretical maximum economic benefit potential arising from variability reduction.Combining the LQG benchmark directly with benefit potential of MPC control system,both the economic benefit and the optimal operation condition can be obtained by solving the economic optimization problem.The proposed algorithm is illustrated by simulated example as well as application to economic performance assessment of an industrial model predictive control system.
文摘With the advent of economic globalization and the information age increasingly competitive market, facing tough competition in the market, an enterprise in order to gain competitive advantages, to survive and develop, we must continue to improve its overall efficiency and performance. Practice has proved an effective way to improve performance is a performance management.
文摘In this paper, we conduct research on the applications of humanism management thoughts and positive incentive on contemporary enterprise management activities. The success or failure of an enterprise, it has connected with the enterprise staff. Modem enterprise to make the enterprise in the competitive market of the brand is enduring, its survival is to be active play to the initiative, enthusiasm and creativity of employees, emphasizing the subject status of the employees and the leading role which is to emphasize the importance of basic management in enterprise management. Our research provides managers with the state-of-the-art methodology of management which will enhance the overall performance and the efficiency of business operating.
基金Project (Nos.50974150 and 50708105) supported by the National Natural Science Foundation of China
文摘A micro turbo-expander capable of high working speed was specially manufactured for use in an organic Rankine cycle (ORC).A series of tests were executed to examine the performance of the machine.In the experiment,the machine was tested under different inlet pressure conditions (0.2-0.5 MPa).Data such as the compressed air pressure,temperatures of the inlet and the outlet,rotational speed,and electric power generation were analyzed to discover underlying relationships.During the test,the rotational speed of the machine reached as high as 54 000 r/min,the peak value of the temperature drop between the inlet and the outlet reached 42 ℃,the maximum electric power generated by the motor-generator attached to the machine reached 630 W,and the efficiency of the machine reached 0.43.
