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Statistical Analyses of the Effects of Welding Processes on Load, Extension and Hardness Properties of Welded Mild Steel Plates

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Journal of Mechanics Engineering and Automation 2020年第3期10卷 73-83页

作者： Dayo Hephzibah Oladebeye samuel babatope adejuyigbe Biliyaminu Kareem Department of Mechanical Engineering Technology Federal PolytechnicAdo-Ekiti 360231Ekiti StateNigeria Mechatronics Engineering Department Federal UniversityOye-Ekiti 374101Ekiti StateNigeria Industrial and Production Engineering Department Federal University of TechnologyAkure 340001Ondo StateNigeria

Mild steel plates of thicknesses 0.5 mm,0.6 mm,0.7 mm,0.8 mm,0.9 mm and 1.0 mm were prepared as test *** welding with the developed welding robot and manual electric arc welding machine these test samples were subjected to Tensile Strength and Hardness *** data obtained including hardness,load and extension were analyzed and the data produced from electric arc welding operations,the robot welding operations and un-welded plates(control)were compared with one *** statistical analyses of hardness,load and extension tests for developed welding robot,manual electric arc welding and un-welded(control)mild steel plates of different thicknesses were carried *** results revealed that for hardness,the developed robot welding has the highest mean value of 115.30,standard deviation value of 14.32 and variance value of *** descriptive statistics of the load showed that the developed robot welding samples collectively have the lowest mean value of 2,536.85,standard deviation value of 704.21 and variance value of 495,*** descriptive statistics of the extension in which the developed robot welding samples collectively have the lowest mean value of 1.29,standard deviation value of 0.43 and variance value of 0.18 were also *** result for hardness showed homogeneity of variance among hardness tests of the samples,which implies variation in the hardness test among the tests of the samples since p-value is *** the result for loads shows homogeneity of variance among loads of the samples in which the result reveals that there is no variation in the loads among the tests of the samples since p-value is *** result for extension shows homogeneity of variance among extensions of the samples in which it revealed that there is variation in the extensions among the tests of the samples since p-value is *** analysis of variance(ANOVA)test result revealed that there is a significant difference in the hardness of the samples

关键词： Statistical analysis welding processes load extension hardness mild steel.

Minimax Multivariate Control Chart Using a Polynomial Function

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Applied Mathematics 2011年第12期2卷 1539-1545页

作者： Johnson Ademola Adewara Kayode samuel Adekeye Osebekwin Ebenezer Asiribo samuel babatope adejuyigbe 不详

Minimax control chart uses the joint probability distribution of the maximum and minimum standardized sample means to obtain the control limits for monitoring purpose. However, the derivation of the joint probability distribution needed to obtain the minimax control limits is complex. In this paper the multivariate normal distribution is integrated numerically using Simpson’s one third rule to obtain a non-linear polynomial (NLP) function. This NLP function is then substituted and solved numerically using Newton Raphson method to obtain the control limits for the minimax control chart. The approach helps to overcome the problem of obtaining the joint probability distribution needed for estimating the control limits of both the maximum and the minimum statistic for monitoring multivariate process.

关键词： Minimax Non-Linear Polynomial Process Maximum and Minimum

Computer Aided Model for Casting Aluminium Using Die-Casting

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材料科学与工程（中英文B版） 2014年第2期4卷 64-68页

作者： Pius Bamidele Mogaji samuel babatope adejuyigbe Olawale Mattew Tunde Bada Department of Mechanical Engineering Federal University of Technology Akure Department of Mechanical Engineering Federal University of Agriculture Abeokuta

An Improved Genetic Algorithm for Flight Path Re-Routes with Reduced Passenger Impact

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Journal of Computer and Communications 2017年第7期5卷 65-75页

作者： babatope samuel Ayo School of Electrical Engineering and Computer Science University of Bradford Bradford United Kingdom

Adverse weather has serious implications for flight timeliness, as well as passenger and aircraft safety. This often implies that alternative flight paths have to be used by aircraft to avoid adverse weather. To reduce the impact of such path re-routes, exact techniques such as artificial potential field model and Dijkstra’s algorithms have been proposed. However, such approaches are often unsuitable for real time scenarios involving large number of waypoints and constraints. This has led to the use of metaheuristic techniques that give sub-optimal solutions in good time. In this work, an improved genetic algorithm-based technique has been proposed. The algorithm used an improved mutation operator, reduced passenger inconvenience and considered the schedules of aircraft.

关键词： Flight Weather Shortest Path Genetic Algorithm Passenger Inconvenience

Performance Evaluation of Dry Season Okra under Sawdust and Trash Mulch Cover Treatments in Southwestern Nigeria

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Open Journal of Soil Science 2013年第8期3卷 337-341页

作者： Oladipo Isaac Olaposi Adewumi Johnson Kayode Dairo Olawale Usman adejuyigbe samuel babatope Ajayi Ebenezer Ayodele Department of Agricultural Engineering Federal University of Agriculture Abeokuta Nigeria Department of Agricultural Engineering Federal University of Technology Akure Nigeria Department of Mechanical Engineering Federal University of Agriculture Abeokuta Nigeria The Federal Polytechnic Department of Agricultural and Bioenvironmental Engineering PMB Ado Ekiti Nigeria

This paper reports the experimental investigation of the agronomic performance of okra under various quantities of both sawdust and trash mulches. The location of the field was the research farmland of the Federal Polytechnic Ado Ekiti Nigeria;Lat 6?N and Long 16?E. The experimental design used was complete randomized design with 6 treatments on both specimens. The experiments were repeated the following year on the same plot but with transposed plot allocation. Soil moisture loss from uncovered plot was with the highest value dropping to less than 2 per cent. It was followed by that of trash plot and the lowest loss was on sawdust mulched plot. The number of leave formed by okra on sawdust, trash and no mulch plots was 43, 36 and 27 respectively while maximum girth diameter was 37 mm in both trash and sawdust covered plots but okra plant on control plot attained only 26 mm diameter. Fruit yield were almost similar to trash and sawdust mulched okra having 7.5 and 7.6 Tonnes/Ha respectively while control plot recorded 5.2 Tonnes/Ha. The ash content of dry matter of sawdust, trash and no mulched plants was 0.25, 0.20 and 0.17 kg respectively. It was concluded that sawdust could perform as much as the traditional trash materials commonly used in Southwestern Nigeria. Also, sawdust was a good material for conserving soil moisture.

关键词： Evapotranspiration Carbon Capture Agronomic Development Soil Moisture Climate Change

Atmospheric Corrosion Studies of Ductile Iron and Austenitic Stainless Steel in an Extreme Marine Environment

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Journal of Minerals and Materials Characterization and Engineering 2012年第9期11卷 914-918页

作者： Olasupo Ogundare Babaniyi babatope Adelana Razaq Adetunji samuel Olugbenga Oloruntoba Olusunle Department of Materials Science and Engineering ObafemiAwolowo University Ile Ife. Nigeria Department of Physics ObafemiAwolowo University Ile Ife. Nigeria National Agency for Science and Engineering Infrastructure Abuja. Nigeria Prototype Engineering Development Institute Ilesa Nigeria

This paper presents the corrosion characteristics and the accompanying changes in the microstructure of unalloyed duc-tile iron (DI) and austenitic stainless steel (ASS) in table salt medium representing an upper limit in an extreme marine environment. The individual corrosion rates of DI and ASS was evaluated for the maximum time period of 1200 hr. Using the immersion test technique, the corrosion rate of DI was evaluated and found to be four-orders of magnitude greater than that of ASS. The corrosion product morphologies of the DI showed that the nodular matrix was gradually covered up as immersion time progressed while the corrosion channels and volume of pits that initially formed in ASS respectively deepened and increased with increased exposure time. This work is important as a reference point for the quantification of the corrosion effectiveness of alloying DI. The microstructures of the corroded samples showed corro-sion initiation and gradual accumulation of corrosion products.

关键词： Atmospheric Corrosion Ductile IronL Austenitic Stainless Steel Sodium Chloride And Microstructure