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The Relationship between Mandarin Classroom Learning Environment and Students' Motivation to Learn Mandarin:A Study of a Sample of Grade 7&8 Students from Chinese School in Kuala Lumpur,Malaysia

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海外英语 2017年第16期 247-248页

作者：王洋 segi university

The literature of the classroom environment research has been reviewed extensively over the years(Haertel, Walberg,&Haertel, 1981; Fraser, 1986; Fraser, 1991; Fraser, 1998; Fraser, 2002; Fraser, 2007). Reviews on early classroom environment studies revealed that there were relationships between students' perceptions towards their classroom learning environments and their cognitive and affective learning outcomes(Fraser, 1986; Haertel, Walberg, &Haertel, 1981). This study is designed to investigate teachers' and students' perceptions towards their Malaysian classroom learning environments in six dimensions, namely‘Student Cohesiveness',‘Teacher Support',‘Involvement',‘Cooperation,‘Task Orientation'and‘Equity'in Malaysia secondary schools.

关键词： classroom environment students’ motivation Mandarin

A Novel Power Curve Prediction Method for Horizontal-Axis Wind Turbines Using Artificial Neural Networks

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Energy Engineering 2021年第3期118卷 507-516页

作者： Vin Cent Tai Yong Chai Tan Nor Faiza Abd Rahman Chee Ming Chia Mirzhakyp Zhakiya Lip Huat Saw Centre for Modelling and Simulation Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling Jaya47810Malaysia Mechanical Engineering Department Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling Jaya47810Malaysia Lee Kong Chian Faculty of Engineering and Science UTARKajang43200Malaysia

Accurate prediction of wind turbine power curve is essential for wind farm planning as it influences the expected power *** methods require detailed wind turbine geometry for performance evaluation,which most of the time unattainable and impractical in early stage of wind farm *** significant amount of work has been done on fitting of wind turbine power curve using parametric and non-parametric models,little to no attention has been paid for power curve modelling that relates the wind turbine design *** paper presents a novel method that employs artificial neural network to learn the underlying relationships between 6 turbine design parameters and its power curve.A total of 198 existing pitch-controlled and active stall-controlled horizontal-axis wind turbines have been used for model training and *** results showed that the method is reliable and reasonably accurate,with average R^(2)score of 0.9966.

关键词： Wind turbine power curve artificial neural network HAWT

Kinetic Study for Adsorption of Heavy Metals on Zeolite

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Journal of Harbin Institute of Technology(New Series) 2022年第1期29卷 70-76页

作者： Kow Jing Yang Lim Lee Fong Chan Mieow Kee Aseel Ali Saeed Centre for Water Research Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling JayaSelangor 47810Malaysia

Heavy metals⁃polluted water has negative impact on the *** Malaysia,minimum discharge limit for Cu^(2+)and Zn^(2+)are 1 mg/L and 2 mg/L,*** is a highly porous adsorbent and its performance is affected by various factors,including contact time and ***,the objective of this study is to identify an ideal operating condition to treat Cu^(2+)and Zn^(2+)solutions up to the allowable discharge limit,by considering the pH and contact time *** kinetic models were studied to identify the adsorption mechanism of the heavy metal removal *** solute batch adsorption experiment was conducted within pH 3-11 from 30 to 150 *** showed that hydration enthalpy(ΔHhyd)governed the selectivity of heavy metals,where a maximum of 90.87%Zn^(2+)(ΔH_(hyd)=-1955 kJ/mol)and 82.15%Cu^(2+)(ΔH_(hyd)=-2010 kJ/mol)removals were found at pH≥*** pH adjustment,selectivity towards Cu^(2+)was higher compared with Zn^(2+)due to the size of hydration radii,where Cu^(2+)is 0.11Åsmaller than Zn^(2+).By considering both pH and contact time factors,this study shows that by adjusting the pH of Zn^(2+)solutions to a minimum pH value of 7,the contact time required to achieve maximum Zn^(2+)removal rate was 90%,which can be achieved within 60 ***,zeolite performed better in Cu^(2+)removal without any pH adjustment where a maximum of 94%was achieved at 120 *** concentration of 0.523 mg/L Cu^(2+)and 0.981 mg/L Zn^(2+)were obtained in this *** study showed that Ritchie’s equation predicted Cu^(2+)adsorption the best,while Zn^(2+)adsorption could be represented by Elovich *** suggested that the adsorption on the activate site governed Cu^(2+)and Zn^(2+)removal ***,future work should focus on modifying zeolite surface to improve the adsorptive performance.

关键词： zeolite heavy metal removal pH contact time

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A Qualitative Study of Early Childhood Education Using NVivo11

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Psychology Research 2021年第8期11卷 344-351页

作者： Yang Linying segi university Kuala LumpurMalaysia

Based on the grounded theory,with NVivo11,from the perspectives of teachers,parents,kindergarten administrators,students who major in preschool education,children and policies,the author did the qualitative research and analysis on the texts,videos,radios,and pictures that reflected children’s lives,games,and *** result showed happiness,respect to children,love,health,the growth and development of life,habit formation,intelligence enlightenment,and the favorable environment can reflect the essential characteristics of preschool ***,interest classes and the tendency to make a kindergarten as an elementary school are abnormal in preschool education and deviate from the essence of preschool education and should be corrected.

关键词： preschool education the essence of preschool education qualitative analysis the grounded theory

Long-Term Electricity Demand Forecasting for Malaysia Using Artificial Neural Networks in the Presence of Input and Model Uncertainties

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Energy Engineering 2021年第3期118卷 715-725页

作者： Vin Cent Tai Yong Chai Tan Nor Faiza Abd Rahman Hui Xin Che Chee Ming Chia Lip Huat Saw Mohd Fozi Ali Centre for Modelling and Simulation Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling JayaMalaysia Mechanical Engineering Department Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling JayaMalaysia Lee Kong Chian Faculty of Engineering and Science UTARKajangMalaysia Faculty of Civil Engineering Universiti Teknologi MARAShah AlamMalaysia

Electricity demand is also known as load in electric power *** article presents a Long-Term Load Forecasting(LTLF)approach for *** Artificial Neural Network(ANN)of 5-layer Multi-Layered Perceptron(MLP)structure has been designed and tested for this *** of input variables and ANN model were introduced to obtain the prediction for years 2022 to *** correlation was used to examine the input variables for model *** analysis indicates that Primary Energy Supply(PES),population,Gross Domestic Product(GDP)and temperature are strongly *** forecast results by the proposed method(henceforth referred to as UQ-SNN)were compared with the results obtained by a conventional Seasonal Auto-Regressive Integrated Moving Average(SARIMA)*** R^(2)scores for UQ-SNN and SARIMA are 0.9994 and 0.9787,respectively,indicating that UQ-SNN is more accurate in capturing the non-linearity and the underlying relationships between the input and output *** proposed method can be easily extended to include other input variables to increase the model complexity and is suitable for *** the available input data,UQ-SNN predicts Malaysia will consume 207.22 TWh of electricity,with standard deviation(SD)of 6.10 TWh by 2030.

关键词： Long-term load forecasting SARIMA artificial neural networks uncertainty analysis Malaysia

Reliability Based Multi-Objective Thermodynamic Cycle Optimisation of Turbofan Engines Using Luus-Jaakola Algorithm

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Energy Engineering 2021年第4期118卷 1057-1068页

作者： Vin Cent Tai Yong Chai Tan Nor Faiza Abd Rahman Yaw Yoong Sia Chan Chin Wang Lip Huat Saw Centre for Modelling and Simulation Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling JayaSelangor47810Malaysia Mechanical Engineering Department Faculty of EngineeringBuilt Environment and Information TechnologySEGi UniversityPetaling JayaSelangor47810Malaysia Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul RahmanKajangSelangor43200Malaysia

Aircraft engine design is a complicated process,as it involves huge number of *** design process begins with parametric cycle *** is crucial to determine the optimum values of the cycle parameters that would give a robust design in the early phase of engine development,to shorten the design cycle for cost saving and man-hour *** obtain a robust solution,optimisation program is often being executed more than once,especially in Reliability Based Design Optimisations(RBDO)with Monte-Carlo Simulation(MCS)scheme for complex systems which require thousands to millions of optimisation loops to be *** paper presents a fast heuristic technique to optimise the thermodynamic cycle of two-spool separated flow turbofan engines based on energy and probability of failure criteria based on Luus-Jaakola algorithm(LJ).A computer program called Turbo Jet Engine Optimiser v2.0(TJEO-2.0)has been developed to perform the optimisation *** program is made up of inner and outer loops,where LJ is used in the outer loop to determine the design variables while parametric cycle analysis of the engine is done in the inner loop to determine the engine ***-Hypercube-Sampling(LHS)technique is used to sample the design and model variations for uncertainty *** results show that optimisation without reliability criteria may lead to high probability of failure of more than 11%on *** thrust obtained with uncertainty quantification was about 25%higher than the one without uncertainty quantification,at the expense of less than 3%of fuel *** proposed algorithm can solve the turbofan RBDO problem within 3 min.

关键词： Multi-objective design optimisation reliability based design optimisation turbofan engines luus-jaakola algorithm

Palmitic Acid-Lauric Acid/Expanded Graphite as Form-Stable Composite Phase Change Material for Low-Temperature Energy Storage Applications

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Journal of Harbin Institute of Technology(New Series) 2022年第5期29卷 41-48页

作者： Adel Elgadi Chan Mieow Kee Tan Yong Chai Center for Advanced Materials Research and Manufacturing Processes Faculty of Engineering and the Built EnvironmentSEGi UniversityPetaling Jaya 47810SelangorMalaysia

Low thermal conductivity of binary fatty acid mixture of palmitic and lauric acids(PA-LA)within the value range of 0.15-0.17 W/(m·K)restricts its wide utilization as thermal energy storage material in the active regime of solar heating applications at low operating ***,this mixture as phase change material(PCM)has a suitable phase-change temperature and heat of 36℃and 176.3 J/g,***,the objective of this study is to formulate a novel form-stable composite PCM with the PA-LA mixture and expanded graphite(EG)as a thermal ***-LA eutectic mixture with varied concentrations of EG was prepared and *** thermal conductivity of PA-LA/EG increased gradually with the mass of *** thermal properties were observed in PA-LA/(5%EG)composite,where its melting(T_(m)),freezing temperature(T_(t)),latent melting heat and thermal conductivity was 35.53℃,34.84℃,174 J/g,and 1.19 W/(m·K),***,the composite PCM is characterized by good chemical-thermal stability and thermal reliability for long-term *** conclusion,it can be utilized as a prospective form-stable PCM for thermal energy storage in solar heating systems,overheat treatment systems,and other thermal storage applications at low operating temperatures.

关键词： binary mixture PCM of fatty acid expanded graphite thermal conductivity thermal reliability and stability

Problems and Countermeasures of Educational Management of Postgraduates in Colleges and Universities

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Journal of Contemporary Educational Research 2022年第10期6卷 68-74页

作者： Haiyun Zhang Yi Zhu segi university Kuala Lumpur 231600Malaysia

With the rapid development of postgraduate education in China,the number of postgraduate students in school shows a trend of continuous *** postgraduate education management system in most of the colleges and universities has been gradually improved,and it is the primary task of contemporary postgraduate education administrators to cultivate high-level innovative talents who are suitable for the country’s social and economic *** study analyzed the existing problems in the management of postgraduate education in colleges and universities,and the relevant solutions of the problems were also proposed in this paper.

关键词： Colleges and universities Graduate students Education management Countermeasure analysis

Comparative Study on Microstructures of Zincalume Steel(G550)Welded Joint Between Metal Inert Gas and Laser Beam Welding

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Journal of Harbin Institute of Technology(New Series) 2021年第5期28卷 89-96页

作者： Walisijiang Tayier Shamini Janasekaran Syed Menhazul Bari Center for Advanced Materials and Intelligent Manufacturing Faculty of EngineeringBuilt Environment and Information TechnologySEGi University Sdn BhdPetaling Jaya 47810Malaysia

Zincalume steel(G550)is commonly used in various construction fields because of its high corrosion resistance and good mechanical *** recent years,a number of steel companies have massively produced zincalume steel(G550)with large volumes of *** the reduction of massive industrial wastes,the zincalume steel(G550)was welded in the lap joint configuration using different welding parameters in the metal inert gas(MIG)welding and laser beam welding(LBW)process in this *** MIG welding and LBW are more welcomed welding methods due to their high efficiency and low ***,they are different as the LBW offers welding speed three to five times faster than MIG welding,while LBW’s heat transfer to workpieces is much less than MIG welding,which can avoid some *** microstructure of zincalume steel(G550)was investigated using scanning electron microscopy(SEM)and the microstructure characterizations of welded specimens were *** experiment found the columnar dendrites extended under the heat flow direction during the MIG welding and LBW ***,the columnar grains were formed in between the equiaxed zone and fusion zone(FZ)at high heat input and slow cooling ***,the grain size of FZ was comparatively smaller than heat affected zone(HAZ)and base metal(BM).

关键词： zincalume steel(G550) metal inert gas(MIG) laser beam welding(LBW) microstructures

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