จำนวน Repository ( 160 )
การศึกษาวิจัยตลาดแรงงาน (Target Market) ของคณะวิศวกรรมศาสตร์ กับการก้าวเข้าสู่อุตสาหกรรม 4.0 เพื่อความยั่งยืน
Since the industries are developing to Industry 4.0 in the near future. Therefore a study of faculty of engineering Rajamangala University of Technology Phra Nakhon target market with Industry 4.0 for sustainability is the necessity. In order to collect the data build the knowledge about the target market in the Industry 4.0 era. Moreover a survey of the requirement of graduates’ characteristic that can support the revolution from Industry 3.0 to Industry 4.0 is very important. Therefore the faculty of engineering Rajamangala University of Technology Phra Nakhon can well prepare the graduates production for supporting the Industry 4.0 for sustainability.
แบบจำลองของเกณฑ์การหยุดทำงานของฟัซซี่ดิฟเฟอเรนเชียลอิโวลลูชัน แบบหลายวัตถุประสงค์ โดยการป้อนกลับเมตริกสมรรถนะ
Differential evolution is one of the most efficient optimization algorithms for solving complication problems including single objective multiobjective and many-objective optimization. It is a stochastic population-based search approach for optimization over the continuous space. The main advantages of differential evolution are simplicity robustness and high speed of convergence. The Advanced Fuzzy-based Multiobjective Differential Evolution (AFMDE) that exploits three performance metrics specifically hypervolume spacing and maximum spread to measure the state of the evolution process. The fuzzy inference rules are applied to these metrics in order to adaptively adjust the associated control parameters of the chosen mutation strategy used in AFMDE. The optimization algorithm will stop the evolution process if the number of iterations reaches the stopping criteria which usually is the maximum number of iterations. Then the optimization algorithm delivers the optimal solution founded. However sometimes if the maximum number of iterations is not appropriately defined the found solutions may not be the optimal ones. In case of the optimization algorithm has found the optimal solutions but it must continue the evolution process because the stopping criteria are not met. This can cause unnecessary using of high computational resources and time-consuming. Therefore this research study proposed the stopping criteria based on performance metrics feedback for AFMDE. The efficiency of the proposed criteria combined with AFMDE is evaluated on the well-known ZDT benchmark test suites.
เทคนิคการสกัดน้ำมันและการผลิตไบโอดีเซลจากน้ำมันเมล็ดกระบก
This paper presents the experimental results of the oil extraction process from wild almond seeds by mechanical and chemical methods. The optimum conditions for the biodiesel production from the extracted oil via transesterification reaction using methanol and potassium hydroxide (KOH) are reported. Chemical extraction was found to be an effective technique for wild almond oil extraction. Simple distillation was used as oil extraction unit applying 140 ml of n-hexane as solvent at 70ºC for 20 min. The oil yield was 43.11±0.98%. This extracted oil was used as raw material for biodiesel production with the maximum yield of 83.20±1.11%. The optimum conditions for biodiesel production were the catalyst loading of 0.5 wt% and 9:1 molar ratio of methanol to oil in a controlled reaction temperature of 70ºC for 60 min. Finally the properties of biodiesel were analyzed and most properties met the requirements of the department of energy business standard.
การศึกษาหาเปอร์เซ็นต์การหดตัวของพลาสติก อะคริโลไตรล์บิวทาไออีนสไตรีน โดยยึดตามาตรฐาน ASTM D955 standard test method
The shrinkage of plastic was caused by the shape of the product and the type of plastic used in the injection. The plastic shrinkage difference was resulted from the temperature used in melting the injection speed mold cooling and different injection surroundings. These led to unknown exact value of plastic shrinkage and the trial and error work has been done. As a result of trial and error work the injection products were not in the determined size. This research aims to find the percentage of plastic shrinkage according to standard test ASTM D955 from (Amorphous Thermoplastic) (Acrylonitrile Butadiene Styrene ABS). The findings showed that square specimen size 60x60x2 mm measured from vertical perpendicular to flowing direction the shrinkage was at 0.86% the shrinkage was at 0.59% when measured from flowing direction and the thickness expanded at 20%. For the rectangular specimen size 12.7x127x3.2 mm measured from vertical perpendicular to flowing direction the expanding was at 0.16% the shrinkage was at 0.88% when measured from flowing direction and the thickness expanded at 14.86%. The circular specimen size 100x3.2 mm the shrinkage was at 1.26 when measured from vertical perpendicular to flowing direction the shrinkage measured from flowing direction was at 0.82% and the thickness expanded at 13.23%
ทักษะบัณฑิตหลักสูตรภาษาอังกฤษเพื่อการสื่อสารสากลที่ผู้ใช้บัณฑิตต้องการในศตวรรษที่ 21
The purposes of the research were to 1) study the 21st century skills of English for International Communication graduates desired by employers and 2) compare the employers’ requirements to skills of English for International Communication graduates categorized by the individual factors. The sample were 55 employers participating in the cooperative education project in the academic year 2017. The research tools were questionnaires and interviews. The statistical data analysis was performed by frequency percentage mean standard deviation and F distribution and the interview data analysis was performed by frequency and content analysis. It was found that the overall requirement of the employers for the 21st century skills of the graduates was at the high level (χ = 4.43 S.D = .35). As for each attribute the highest level was enthusiasm (χ = 4.63 S.D = .45) followed by collaboration (χ = 4.58 S.D = .46) and thinking skills (χ = 4.54 S.D = .47) respectively. The lowest level was the inquiry skills (χ = 4.07 S.D = .59). The result of the research hypothesis revealed that there is no significant difference between the employers with different employment sectors and working status and the requirement of the graduates’ attributes.