This paper probes into the feasibility of equilibrating pressure of water distribution network through (using auto-control valves) in theory and in the economy. An optimal valve control model is designed to minimize t...This paper probes into the feasibility of equilibrating pressure of water distribution network through (using auto-control valves) in theory and in the economy. An optimal valve control model is designed to minimize the sum of squares of residual pressure in the network. Such an analog simulation has been performed on the year 2003 programming network of a certain littoral district in North China, through which this paper confirms that it is feasible to equilibrate pressure with auto-control valves in theory. The research work has brought about a discovery of applicable conditions of valves in economic feasibility, which avoids a great economic loss due to the wild use of auto-control valve. In addition, simulated annealing algorithm is applied to optimize valve settings and shown to identify global optimum or near-optimum.展开更多
In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied...In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied increasingly in the water network, and in order to reflect the network operational condition more accurately, a new water network macroscopic model is developed by taking the auto-control adjusting valve opening state into consideration. Then for highly correlated or collinear independent variables in the model, the partial least squares (PLS) regression method provides a model solution which can distinguish between the system information and the noisy data. Finally, a hypothetical water network is introduced for validating the model. The simulation results show that the relative error is less than 5.2%, indicating that the model is efficient and feasible, and has better generalization performance.展开更多
In the field of education, there is a need for a financing system which is affordable, yet effective, as well as profitable, and is based on user participation. This need was the main reason the author has designed th...In the field of education, there is a need for a financing system which is affordable, yet effective, as well as profitable, and is based on user participation. This need was the main reason the author has designed the model named ＂Insured Education System Model---IESM＂. The IESM is based on the principle that expenditures incurred at each stage of educational attainment should not be burdened upon the person himself/herself. There should be insurance companies willing to cover the educational expenditures of the buyers. The suggested IESM model also creates an auto-control mechanism within the financing system through which insurance companies, educational institutions （buyers）, and households will gain benefits. Furthermore, the IESM will increase the quality of service within the overall educational system, and create employment, as well as eliminating the number of school drop outs. The system will bring a significant decrease in the cost of the service. This study presents the results of the analyses on the data collected by the author on the perception of the proposed Insured Education System Models through surveys conducted in selected schools in Istanbul. The survey is unique in a sense that for the first time in literature such a model is suggested and the perception of relevant stake holders are tested through a questionnaire of 42 questions. The results show that there is an approval rate of more than 50% regarding to the IESM. And the frequency analysis suggests that the IESM is an applicable model.展开更多
Deduced the relationship between the power factor (PF) and the angular fre-quency according to the simplified equivalent circuit of asynchronous motor, forming a power factor auto-control system. An anti-interference ...Deduced the relationship between the power factor (PF) and the angular fre-quency according to the simplified equivalent circuit of asynchronous motor, forming a power factor auto-control system. An anti-interference circuit was also introduced in the middle voltage link of inverter to avoid the shift of the optimum PF point caused by the change of the load and the reliable run of the control system was assured. The experi-ment results show that it has a good self-adaptation in the whole scope of speed ad-justment and an obvious economization on energy while it runs under load.展开更多
The biggest problem in the world as well as in Turkey is to increase efficiency of human capital, which can only be achieved by educating all people in accordance with their capacities and demands. And, the biggest pr...The biggest problem in the world as well as in Turkey is to increase efficiency of human capital, which can only be achieved by educating all people in accordance with their capacities and demands. And, the biggest problem in education is finance. In order for everybody to have education, there is a need to develop a finance system which will help overcome the financial problems faced by households or individuals. For this purpose, the participatory, payable, profitable, and potent （4p＇s） insured education system model （IESM） is developed. This paper focuses on principles of the IESM and the analyses of frequency and variance by categories （one-way ANOVA）.展开更多
文摘This paper probes into the feasibility of equilibrating pressure of water distribution network through (using auto-control valves) in theory and in the economy. An optimal valve control model is designed to minimize the sum of squares of residual pressure in the network. Such an analog simulation has been performed on the year 2003 programming network of a certain littoral district in North China, through which this paper confirms that it is feasible to equilibrate pressure with auto-control valves in theory. The research work has brought about a discovery of applicable conditions of valves in economic feasibility, which avoids a great economic loss due to the wild use of auto-control valve. In addition, simulated annealing algorithm is applied to optimize valve settings and shown to identify global optimum or near-optimum.
基金Supported by Tianjin Natural Science Foundation( No. 003611611).
文摘In order to overcome the low precision and weak applicability problems of the current municipal water network state simulation model, the water network structure is studied. Since the telemetry system has been applied increasingly in the water network, and in order to reflect the network operational condition more accurately, a new water network macroscopic model is developed by taking the auto-control adjusting valve opening state into consideration. Then for highly correlated or collinear independent variables in the model, the partial least squares (PLS) regression method provides a model solution which can distinguish between the system information and the noisy data. Finally, a hypothetical water network is introduced for validating the model. The simulation results show that the relative error is less than 5.2%, indicating that the model is efficient and feasible, and has better generalization performance.
文摘In the field of education, there is a need for a financing system which is affordable, yet effective, as well as profitable, and is based on user participation. This need was the main reason the author has designed the model named ＂Insured Education System Model---IESM＂. The IESM is based on the principle that expenditures incurred at each stage of educational attainment should not be burdened upon the person himself/herself. There should be insurance companies willing to cover the educational expenditures of the buyers. The suggested IESM model also creates an auto-control mechanism within the financing system through which insurance companies, educational institutions （buyers）, and households will gain benefits. Furthermore, the IESM will increase the quality of service within the overall educational system, and create employment, as well as eliminating the number of school drop outs. The system will bring a significant decrease in the cost of the service. This study presents the results of the analyses on the data collected by the author on the perception of the proposed Insured Education System Models through surveys conducted in selected schools in Istanbul. The survey is unique in a sense that for the first time in literature such a model is suggested and the perception of relevant stake holders are tested through a questionnaire of 42 questions. The results show that there is an approval rate of more than 50% regarding to the IESM. And the frequency analysis suggests that the IESM is an applicable model.
基金Supported by Liaoning Educational Foundation(202183386)
文摘Deduced the relationship between the power factor (PF) and the angular fre-quency according to the simplified equivalent circuit of asynchronous motor, forming a power factor auto-control system. An anti-interference circuit was also introduced in the middle voltage link of inverter to avoid the shift of the optimum PF point caused by the change of the load and the reliable run of the control system was assured. The experi-ment results show that it has a good self-adaptation in the whole scope of speed ad-justment and an obvious economization on energy while it runs under load.
文摘The biggest problem in the world as well as in Turkey is to increase efficiency of human capital, which can only be achieved by educating all people in accordance with their capacities and demands. And, the biggest problem in education is finance. In order for everybody to have education, there is a need to develop a finance system which will help overcome the financial problems faced by households or individuals. For this purpose, the participatory, payable, profitable, and potent （4p＇s） insured education system model （IESM） is developed. This paper focuses on principles of the IESM and the analyses of frequency and variance by categories （one-way ANOVA）.
