จำนวน Repository ( 37 )

Mathematical spatial analysis for multiple disease mapping application to hypertension and ischemic heart disease
Mathematical spatial analysis for multiple disease mapping application to hypertension and ischemic heart disease

The objectives of this research are to estimate the morbidity rates of Hypertension and Ischemic heart disease in each province of Thailand to investigate factors influencing on the morbidity rates and to construct the disease maps of those two diseases. The generalized linear mixed model (GLMM) in which the responses have a Poisson distribution and the spatial effects are a multivariate conditional autoregressive model (MCAR) are adopted. The provincial secondary data sets consisting of a number of Hypertension and Ischemic heart disease patients an average income per head and a student proportion were collected. The results show the average income per head (Relative Risk (RR) = 1.0002) and student proportion (RR = 1.0186) influence the morbidity rates of Hypertension and Ischemic heart disease. Hypertension and Ischemic maps are easy for readers to see which areas are at high risk. They are a useful tool for planning and controlling the Hypertension and Ischemic heart disease.

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Wind turbine simulator based on constant Volts/Hertz control   three phase induction motor drives
Wind turbine simulator based on constant Volts/Hertz control three phase induction motor drives

This article presents the application of the constant Volts per Hertz control to control a three phase induction motor has torque and speed characteristics similar to wind turbine. Due to this method is not complicated and does not require the parameters of motor. As a result the accuracy of control is independent of variation of the parameters of motor. Furthermore the equation for compensate the difference between the moment of inertia of wind turbine and motor which is consistent with the mentioned control method is proposed. In order to make the dynamic responses of the wind turbine simulator similar to the wind turbine and to overcome the problems of noise amplification from differentiation that leads to instability of the system. The simulation results in Matlab/Simulink program show that the proposed wind turbine simulator can imitate the wind turbine accurately both in dynamic and steady state conditions

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Comparison of PWM power rectifier between 6 pules and 12 pules converter topology
Comparison of PWM power rectifier between 6 pules and 12 pules converter topology

This paper presents a study of comparison of PWM power rectifier between 6 Pules and 12 Pules converter topology by small hydro turbine Generator (20kW) is power supply and Compare harmonics Current feed in the systems. Both converter connected Permanent Magnet Synchronous Generator (PMSG) and Voltage Regulator Control at 700 V. The control system by Decoupling Control and Conventional PI Control for control parameter PI value by Nicole-Ziegler method. Analysis for Performance of the system presented a mathematical model with Matlab/Simulink program. The result of simulation have value less than 5 percent of ripple voltage and Voltage Control continuously. Converter 12 pulse have harmonics Current value feed in the systems less than converter 6 pulse. This Case study can apply using PWM power rectifier control in future work

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The internal control of organization in RajamangalaUniversity of Technology Isan, Surin campus
The internal control of organization in RajamangalaUniversity of Technology Isan, Surin campus

This research was to study about the internal controls of organization in RMUTI Surin campus. The purposes of this research were to study about the internal controls the performing process of organization and the comparison internal control of organization. The samplings for study were internal organizations in RMUTI Surin campus consisting of programs divisions and departments. The results were found that the internal organizations had performing about total internal controls were control status risk assessment control activity monitoring and evaluation and the information and communication at high level. The results of comparison were found that the internal organizations consisting of sub-divisions and sub-programs had internal control with overall and aspect. There was risk assessment higher than divisions. The divisions performed more than four years had information and communication and monitoring and evaluation higher than divisions performed only one-three years with overall and aspect. The internal organizations were sub-divisions and numbers of staffs were not different performances about internal control with overall and aspect.

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Mathematical modelling for design the control system of a liquid
Mathematical modelling for design the control system of a liquid

This paper presents a mathematical modelling for design the control system of a liquid. The system are consists of one and two tanks of a liquid. To confirm the achieved mathematical modelling is used to design P PI PD and PID controller in the frequency domain. The experimental results are indicated as the following. An one tank of a liquid controlling The controller can be control the liquid level to set point with in 100s. In the case of a disturbance occurs in the system it is perform by drain a liquid. As same as the controller it can be control the liquid level into the steady state. In the part of the liquid control this is the interaction between two tanks. The experimental results of the system operation the controller can be control the liquid into the set point both occur disturbance and without disturbance respectively

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