2017 Moratuwa Engineering Research Conference (MERCon)最新文献_第9页

Identifying the influence of mathematics on academic performance of engineering students 确定数学对工科学生学业成绩的影响

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980490

K. Nanayakkara, T. Peiris

{"title":"Identifying the influence of mathematics on academic performance of engineering students","authors":"K. Nanayakkara, T. Peiris","doi":"10.1109/MERCON.2017.7980490","DOIUrl":"https://doi.org/10.1109/MERCON.2017.7980490","url":null,"abstract":"Mathematics plays a major role in higher education as it is particularly essential to develop the analytical thinking of students. Investigating the student academic performance has been a crucial aspect of the educational research recently. The objective of this study is to explore the relationships between students' mathematics performance in Level 1 and Level 2 with their engineering performance in Level 2 separately. Firstly, Canonical Correlation Analysis was employed to study the joint impact of mathematics in Level 1 and Level 2 on engineering performance. The two adjusted analyses; Partial Canonical Correlation Analysis and Part Canonical Correlation Analysis were used to determine the unique effect of mathematics in Level 1 and Level 2 on students' engineering performance in Level 2. The study was conducted with engineering undergraduates from Chemical and Process Engineering discipline at the Faculty of Engineering, University of Moratuwa, Sri Lanka. Results revealed that the mathematics in Level 1 and Level 2 jointly influenced on students' engineering performance in Level 2. Adjusted analyses showed that unique effect of mathematics in Level 2 is significantly higher compared to the unique effect of mathematics in Level 1 on students' engineering performance in Level 2. But, there would be a notable indirect effect of mathematics in Level 1 on engineering performance in Level 2. It can be concluded that the combined effect of mathematics in both Level 1 and Level 2 is immensely beneficial to improve the overall academic performance at the end of Level 2 of the engineering students.","PeriodicalId":395453,"journal":{"name":"2017 Moratuwa Engineering Research Conference (MERCon)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130358508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Prediction of creased geometry of thin folded membranes using finite element analysis 利用有限元分析预测薄折叠膜的折痕几何形状

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980496

S. Mierunalan, H. Mallikarachchi

引用次数: 1

Blind channel equalization in the presence of co-channel interference using higher order statistics 利用高阶统计量实现同信道干扰下的盲信道均衡

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980486

Balagobalan Kapilan, Guohua Wang, S. G. Razul, Shang-Kee Ting, C. See

引用次数: 0

Parameterized Diamond Tiling for Parallelizing stencil computations 用于并行化模板计算的参数化菱形平铺

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980464

T. Wijesinghe, K. Senevirathne, C. Siriwardhana, W. Visitha, Sanath Jayasena, Tharindu Rusira Patabandi, M. Hall

引用次数: 0

Evaluation of the applicability of Zimont's turbulent flame speed closure model to an octane fueled engine with moderate level of turbulent intensity 齐蒙湍流火焰速度闭合模型在中等湍流强度辛烷值发动机上的适用性评价

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980483

J.K.L. Eranga

{"title":"Evaluation of the applicability of Zimont's turbulent flame speed closure model to an octane fueled engine with moderate level of turbulent intensity","authors":"J.K.L. Eranga","doi":"10.1109/MERCON.2017.7980483","DOIUrl":"https://doi.org/10.1109/MERCON.2017.7980483","url":null,"abstract":"present work aims to evaluate the ability of the turbulent flame speed closure model developed by Zimont for predicting the characteristics of premixed turbulent combustion process in an SI engine. Combustion of the Ricardo E6 single cylinder test engine was modeled with the above turbulent flame speed closure model combined with the progress variable approach, implemented to a commercial computational fluid dynamics code. Full cycle simulations, covering all four strokes including the valve motion, spark discharge, flame kernel development and fully developed combustion, were performed for two different operating conditions of the engine. The engine as fueled with gasoline. Obtained results were compared with experimental data obtained for the same operating conditions of the E6 engine in order to assess the prediction ability of the model. Accordingly, In-cylinder pressure variation and the combustion heat release rate with respect to crank angle were compared with measured values. In general, predictions, of the model was found to be in reasonable agreement with experiment values, but significant discrepancies could be observed in certain operating conditions. In fact, combination of multiple models for different phases of the combustion process was found to require significant fine tuning of model constants to obtain reasonable predictions.","PeriodicalId":395453,"journal":{"name":"2017 Moratuwa Engineering Research Conference (MERCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130447532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automatic assessment of student answers for geometric theorem proving questions 自动评估学生对几何定理证明问题的答案

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980520

Chamupathi Mendis, Dhanushka Lahiru, Naduni Pamudika, Supun Madushanka, Surangika Ranathunga, G. Dias

引用次数: 1

Development of a best-fit algorithm for feature based assembly 基于特征装配的最佳拟合算法的发展

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 2017-05-01 DOI: 10.1109/MERCON.2017.7980482

N. Jayaweera, H. Herath, P.A.P. Madushanka, H.P.C. Sampath, J.H.C.A.K. Jayamaha

{"title":"Development of a best-fit algorithm for feature based assembly","authors":"N. Jayaweera, H. Herath, P.A.P. Madushanka, H.P.C. Sampath, J.H.C.A.K. Jayamaha","doi":"10.1109/MERCON.2017.7980482","DOIUrl":"https://doi.org/10.1109/MERCON.2017.7980482","url":null,"abstract":"Traditionally, domestic water pump assembly is often carried out manually using dedicated fixed systems. These are inflexible, have long manufacturing lead time and can lead to capital bottlenecks. One way of introducing flexibility is by incorporating robots. Background literature suggested that there has been limited work on the use of flexible robot-based assembly applications. But they all required sophisticated expensive software and hardware for their implementation. The paper is mainly focused on the development of best fit algorithms for feature based assembly and a process of proving the feasibility of robotic assembly applications. This research, feature-based assembly technique was used as the main method for the assembly of the components since a feature contains much more information than just geometry. A metrology system was used to locate the component and measure the position of the assembly features before assembly. Similarly, the metrology system was used to locate features on the counter part. The acquired data was processed using a mathematical algorithm to calculate the relative component positions required for optimal assembly. The data can also be used to check for the quality of the components and to reject those outside the specification limits. The paper demonstrates that with a combination of metrology and mathematical processing algorithms can be used for the assembly of water pump components within the tolerances limits. The developed system is flexible and reconfigurable due to reduced reliance of fixtures.","PeriodicalId":395453,"journal":{"name":"2017 Moratuwa Engineering Research Conference (MERCon)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133196891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An exact finite element using hyperbolic shear deformation beam theory 采用双曲剪切变形梁理论的精确有限元

2017 Moratuwa Engineering Research Conference (MERCon) Pub Date : 1900-01-01 DOI: 10.1109/MERCON.2017.7980493

S. Jasotharan, I. Weerasekera

{"title":"An exact finite element using hyperbolic shear deformation beam theory","authors":"S. Jasotharan, I. Weerasekera","doi":"10.1109/MERCON.2017.7980493","DOIUrl":"https://doi.org/10.1109/MERCON.2017.7980493","url":null,"abstract":"A hyperbolic shear deformation theory for thick isotropic beams is developed. This theory satisfies shear stress free boundary condition at top and bottom of the beam and doesn't need shear correction factor. A displacement based finite element model of this theory is formulated using the variational principle. Displacements are approximated using the homogeneous solutions of the governing differential equations that describe the deformations of the cross-section according to the high order theory, which includes cubic variation of the axial displacements over the cross-section of the beam. Also, this model gives the exact stiffness coefficients for the high order isotropic beam element. The model has six degrees of freedom at the two ends, one transverse displacement and two rotations, and the end forces are a shear force and two components of end moments. Results obtained for displacements using the present beam element for static flexure of uniform isotropic cantilever carrying an end load are compared with the solutions derived using the present beam theory, other beam theories and the exact two-dimensional elasticity solution to validate the present beam element. A continuous thick beam problem is also solved for displacements and compared with the results obtained using ‘ABAQUS’ software with different type of beam elements and a two-dimensional model.","PeriodicalId":395453,"journal":{"name":"2017 Moratuwa Engineering Research Conference (MERCon)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122458273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0