จำนวน Repository ( 207 )
การศึกษาเพื่อออกแบบปรับปรุงสภาพแวดล้อมทางกายภาพเพื่อตอบ สนองต่อการใช้งานสาหรับเด็กอ่อนพิการทางสมอง กรณีศึกษา: สถาน สงเคราะห์เด็กอ่อนพิการทางสมองและปัญญา (บ้านเฟื่องฟ้า) ตำบล บางตลาด อำเภอปากเกร็ด จังหวัดนนทบุรี
This research is the study and design of the physical environment to cater for children with disabilities to use a case study: improving the environment. Children of disabled Pak Nonthaburi study to improve the environment. Children of disabled Pak In order to create jobs and public benefits in the form of a physical environment that is suitable for use for children with disabilities who have a lot of current. The standard test for standards in the design of the physical environment in response to applications for children with disabilities. The study and design of the physical environment of the orphanage for disabled children in Pak Kret. Nonthaburi Interview Design Specialist Concluded in the production and design of the model the researchers examined the experts as appropriate. The researcher has taken the form of physical environment of the area for correction. Then the residents living in the questionnaire about the usage patterns of 200 people which is as follows. The front living An average of 4.85 more convenience average of 4.55 more security average is 4.75 the design average is 4.95 the highest overall satisfaction is at the highest level. Then test the furniture Found that the test kit furniture The tests of static force acting on the seat. And static force acting on the backrest. In the qualifying test. Testing criteria of the static pressure exerted on the cantilever side and the wing stays static head. In the qualifying test. The tests of static force acts pressing down armrest. In the qualifying test. The tests of force exerted on the toggle switch and the force acting on the seat backrest. In the qualifying test. The force exerted on the test criteria. In passing the test Testing criteria regarding the impact on the seat cushion and the armrest. In the qualifying test. Testing criteria for lifting the one side and then released into freedom. In the qualifying test.
การเพิ่มเสถียรภาพของระบบไฟฟ้ากำลังด้วยอุปกรณ์ FACTS
At present the electrical power system has growth and more complicate. Because of the development of the economics and society. An increasing the demand of power transmission line system would be resulted in the stability and reliability. The Flexible AC Transmission System devices: (FACTS) is the equipment which can control the flow of real power. In addition it can gladly encourage the stability and reliability of the power transmission line system. This research proposed the impact of placing power electronics device to increase stability and reliability of power system in order to study the impact of Flexible AC Transmission System devices: (FACTS) devices for the resulting to stability of power system. UPFC devices model which consisted of Static Synchronous Compensator and Static Synchronous Series Compensator that worked as independent voltage source for technique to proposed control the flow of real power and reactive power as well as voltage bus in power system. Testing Simulation power flow control of 5 buses by placing unified power flow control indicated the effective compensation of real power and reactive power in power system.
Energy saving strategies in refrigeration systems by defrost management
Defrosting at evaporator panel is one of working cycles in freezer. Power consumption in defrosting does not meet the objective of using freezer therefore the approach to decrease power consumption in defrosting is one strategy for energy saving. Normally the cycle of defrosting in freezer is a constant time that specify by referring to the highest humidity period. With this control concept the problem of temperature exchange is not occurred from ice accumulation at evaporator panel but it makes the over necessity of defrosting process in the low humidity season and cause the unnecessary power usage in freezer. This research presents the control approach for defrosting by using the difference of the temperature at evaporator and the temperature at chilling area. By using this approach the defrosting process is operated depend on load and the fan is on or off relate to defrosting time. Test results demonstrate that about 12% of power can be saved by this control approach when compared to constant time control.
การพยากรณ์ภัยแล้งในประเทศไทย โดยใช้การวิเคราะห์เชิงพื้นที่ด้วยแบบจำลองผสมเชิงเส้นวางนัยทั่วไปแบบเบย์
The objectives of this research were to propose a spatial analysis using Bayesian generalized linear mixed model for predicting drought in Thailand. The spatial effect was assumed to be a conditional autoregressive model (CAR model). The dependent variables was a drought or non-drought occurrence which was assumed to have a Bernolli distribution with logistic link function. Factors considered were rain temperature number of rainy days number of large reservoirs and number of medium reservoirs. The results show that the rain temperature number of rainy days number of large reservoirs and number of medium reservoirs influence on the drought occurrence. This study is useful for planning making decision preventing and remedying the drought problem.
การเลือกฟังก์ชันฤดูกาลที่เหมาะสม ในตัวแบบอนุกรมเวลาแบบเบย์ สาหรับวิเคราะห์ราคาและผลผลิตยางพารา ในประเทศไทย
The objectives of this research were to create a model for time sereries data prices and yields of natural rubber to be more accurate prediction and to compare the proposed model with the classical time series models such as the Holt-Winters Additive Exponential smoothing model (Holt-Winters ES) and the seasonal autoregressive integrated moving average model (SARIMA). The proposed model was a linear mixed model (LMM) consisting with trend autoregression outliers and sesonal terms. Dummy varialbles and Fourier seasonal effects were studied. Bayesian estimation was used and the estimated prices and yields were used for prediction. The results show that the proposed model with a Fouries seasonal effect is the most appropriated comparing with the dummy seasonal effect the Holt-Winters ES and the SARIMA having the least mean absolute values (MAE) both fiting and validating parts. The proposed model with sesaonal dummy variables should be the first consideration for forecasting spatial time series with a seasonal component.