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International journal of engineering. Transactions A: basics最新文献

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Development of Drilling Mud Solution for Drilling in Hard Rocks (RESEARCH NOTE) 硬岩钻井用钻井液溶液的研制(研究说明)
International journal of engineering. Transactions A: basics Pub Date : 2017-03-10 DOI: 10.5829/idosi.ije.2017.30.04a.22
V. Morenov, E. Leusheva
{"title":"Development of Drilling Mud Solution for Drilling in Hard Rocks (RESEARCH NOTE)","authors":"V. Morenov, E. Leusheva","doi":"10.5829/idosi.ije.2017.30.04a.22","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.22","url":null,"abstract":"Aim of the project is efficiency increase of hard rocks destruction at borehole bottom by developing drilling mud solution and evaluation of its influence on drilling process. The article presents the results of studies directed on studying of drilling mud composition (the choice of reagent concentrations, taking into account the filtration properties, structural and rheological parameters, study of the temperature effect influence on the quality of the solution). Experiments of metallic indenter penetration into the glass sample at various number of strikes in the water and surfactant solutions are presented in the article. Paper also offers investigation devoted to development of clayless mud solution with surfactant addings, which will allow increase of hard rocks destruction efficiency. Results of industrial test trials of developed mud solution are also represented, showing implementation of developed drilling mud composition to increase productivity of drilling operations by maintaining high drilling speed and advance per bit.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114422765","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: 19
Ballistic (n,0) Carbon Nanotube Field Effect Transistors' I-V Characteristics: A Comparison of n=3a+1 and n=3a+2 弹道(n,0)碳纳米管场效应晶体管的I-V特性:n=3a+1和n=3a+2的比较
International journal of engineering. Transactions A: basics Pub Date : 2017-03-03 DOI: 10.5829/idosi.ije.2017.30.04a.09
G. Karimi, S. G. Shirazi
{"title":"Ballistic (n,0) Carbon Nanotube Field Effect Transistors' I-V Characteristics: A Comparison of n=3a+1 and n=3a+2","authors":"G. Karimi, S. G. Shirazi","doi":"10.5829/idosi.ije.2017.30.04a.09","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.09","url":null,"abstract":"Due to emergence of serious obstacles by scaling of the transistors dimensions, it has been obviously proved that silicon technology should be replaced by a new one having a high ability to overcome the barriers of scaling to nanometer regime. Among various candidates, carbon nanotube (CNT) field effect transistors are introduced as the most promising devices for substituting the silicon-based technologies. Since the channel of these transistors is made of CNT then its properties, such as chiral vector, have prominent effects on determining the performance of devices. In this paper the CNT diameter impact on tunneling and thermionic emission TE currents of a coaxially-gated CNTFET with doped source/drain extensions is investigated. The source/channel/drain of this transistor are a zigzag CNT with (n,0) chirality. The “n” value could be in the form of n = 3a + 1 or n = 3a + 2. By increasing the “a”, the diameter increases while the energy band gap EG of the CNT decreases; as a result by increasing the “a” value, the on/off current ratio decreases.  However, for n = 3a + 2 the EG of a CNT shows a higher value; then at a given “a”, for  n = 3a + 1 the on/off current ratio may decrease due to a lower EG and hence higher tunneling and TE current. Generally, subthreshold swing improves and threshold voltage increases for a lower diameter device; consequently, the leakage current could diminish. ON-state current and output conductance have higher values for a higher diameter. Also, the difference between EG and hence the I-V characteristics of the device with n = 3a +1 and n = 3a + 2 is negligible for a higher diameter value. All the results could be justified based on the energy-position resolved electron density and current spectrums on energy band diagram of the device.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121621554","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: 6
Fault Detection of Bearings Using a Rule-based Classifier Ensemble and Genetic Algorithm 基于规则的分类器集成和遗传算法的轴承故障检测
International journal of engineering. Transactions A: basics Pub Date : 2017-02-26 DOI: 10.5829/idosi.ije.2017.30.04a.20
M. Heidari
{"title":"Fault Detection of Bearings Using a Rule-based Classifier Ensemble and Genetic Algorithm","authors":"M. Heidari","doi":"10.5829/idosi.ije.2017.30.04a.20","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.20","url":null,"abstract":"This paper proposes a reduct construction method based on discernibility matrix simplification. The method works with genetic algorithm. To identify potential problems and prevent complete failure of bearings, a new method based on rule-based classifier ensemble is presented. Genetic algorithm is used for feature reduction. The generated rules of the reducts are used to build the candidate base classifiers. Then, several base classifiers are selected according to their diversity and the scale of them. Weights of the selected base classifiers are calculated based on a measure of support rate. The classifier ensemble is constructed by the base classifiers. The accuracy reached 98.44% which is 4.5% higher than that of the three base classifiers.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114167701","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: 10
Stiffness Prediction of Beech Wood Flour Polypropylene Composite by using Proper Fiber Orientation Distribution Function 利用纤维取向分布函数预测山毛榉粉聚丙烯复合材料刚度
International journal of engineering. Transactions A: basics Pub Date : 2017-02-19 DOI: 10.5829/idosi.ije.2017.30.04a
R. Khamedi, I. Ahmadi, M. Hashemi, K. Ahmaditabar
{"title":"Stiffness Prediction of Beech Wood Flour Polypropylene Composite by using Proper Fiber Orientation Distribution Function","authors":"R. Khamedi, I. Ahmadi, M. Hashemi, K. Ahmaditabar","doi":"10.5829/idosi.ije.2017.30.04a","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a","url":null,"abstract":"One of the most famous methods to predict the stiffness of short fiber composites is micromechanical modeling. In this study, a Representative Volume Element (RVE) of a beech wood flour natural composite has been designed and the orientation averaging approach has been utilized to predict its stiffness tensor. The novelty of this work is in finding the proper fiber orientation distribution function to increase the precision of the stiffness prediction of this kind of natural composites. The predicted results for stiffness with the micromechanical modeling are compared to the experimental test results and FEM results of beech wood flour/polypropylene composite.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114545243","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: 5
Performance Investigation of 405 Stainless Steel Thermosyphon using Cerium (IV) Oxide Nano Fluid 纳米氧化铈纳米流体对405不锈钢热虹吸管性能的研究
International journal of engineering. Transactions A: basics Pub Date : 2017-02-11 DOI: 10.5829/idosi.ije.2017.30.04a.16
N. Alagappan, N. Karunakaran
{"title":"Performance Investigation of 405 Stainless Steel Thermosyphon using Cerium (IV) Oxide Nano Fluid","authors":"N. Alagappan, N. Karunakaran","doi":"10.5829/idosi.ije.2017.30.04a.16","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.16","url":null,"abstract":"A thermosyphon is an efficient heat transfer device, which transports heat using gravity for the evaporation and condensation of the working fluid. In the present study the Box-Benhnken (BBD) design approach was chosen for the Two-Phase Closed Thermosyphon (TPCT) with CeO2 nanofluid using 0.1% volume of Nanofluid with surfactant of ethylene glycol. The experiment resulted in identifying the optimised set of parameters for 405SS TPCT, to achieve lower thermal resistance and better heat transfer. This work gains significance in the sense that with the number of experiments, reliable model has been generated validated and further, the process has been optimised with one objective which is thermal resistance. To obtain the optimum condition, the response surface methodology (RSM) through Box – Behnken (BBD) was applied.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126188413","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: 5
Effect of Friction Stir Welding on the Tensile Properties of AA6063 under Different Conditions 搅拌摩擦焊对不同条件下AA6063拉伸性能的影响
International journal of engineering. Transactions A: basics Pub Date : 2017-02-09 DOI: 10.5829/idosi.ije.2017.30.04a.19
R. Singh, S. Rizvi, S. Tewari
{"title":"Effect of Friction Stir Welding on the Tensile Properties of AA6063 under Different Conditions","authors":"R. Singh, S. Rizvi, S. Tewari","doi":"10.5829/idosi.ije.2017.30.04a.19","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.19","url":null,"abstract":"The basic aim of present study is to examine the effect of main friction stir welding (FSW) parameters on the quality of AA 6063 plate welds. Welding of AA6063 was carried out by a vertical milling machine, using different tools with a stationary shoulder and during the welding no external heating system was used. Different welding parameters studied were the tool rotational speed which varied from 2700 to 5400 (rpm), the traverse speed of table which varied from 12 to 17 (mm/min), and the tool shoulder diameter ranging from 17 to 22 mm. In the present research three levels, three factorial designs were used for optimization by taguchi approach. The results indicated that tensile strength of welded joint  was increasing with rotational speed and decreasing with increasing transverse feed because frictional heat was directly proportional to rotational speed of tool.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115113200","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: 16
Turbofan Engine Performance under Reliability Measures Approach 可靠性测量方法下的涡扇发动机性能
International journal of engineering. Transactions A: basics Pub Date : 2017-02-09 DOI: 10.5829/idosi.ije.2017.30.04a.21
A. Kumar, R. Kumar, M. Ram
{"title":"Turbofan Engine Performance under Reliability Measures Approach","authors":"A. Kumar, R. Kumar, M. Ram","doi":"10.5829/idosi.ije.2017.30.04a.21","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.21","url":null,"abstract":"In this paper, the authors investigated the various factors, which can affect the performance of a turbofan engine. For this, the various subunits of a turbofan engine like inlet duct, compressor, combustion chamber, liner, turbine, exhaust nozzle etc. are investigated to find its various reliability characteristics through Markov process and supplementary variable technique (SVT). The main advantage of this paper is that through the work one can identify exactly and accurately the factors/units, which mostly influence the performance of a turbofan engine. After investigation, it is concluded that the mean time to failure of angle of attack more frequently occurs throughout the operation of turbofan engine. In addition, it is analyzed that it is more sensitive with respect to the failure rate of inlet duct. Result shows that in order to optimize expected profit the maintenance team must control the service cost of various parts failure of the turbofan engine. doi: 10.5829/idosi.ije.2017.30.04a.21","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123135035","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: 4
Optimum Swept Angle Estimation based on the Specific Cutting Energy in Milling AISI 1045 Steel Alloy 基于比切削能的aisi1045合金钢铣削最佳掠角估算
International journal of engineering. Transactions A: basics Pub Date : 2017-02-09 DOI: 10.5829/idosi.ije.2017.30.04a.18
V. Balogun, Isuamfon F. Edem
{"title":"Optimum Swept Angle Estimation based on the Specific Cutting Energy in Milling AISI 1045 Steel Alloy","authors":"V. Balogun, Isuamfon F. Edem","doi":"10.5829/idosi.ije.2017.30.04a.18","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.18","url":null,"abstract":"Mechanical machining processes are common manufacturing strategies to re-shape materials to desired specification. The mechanistic approach has revealed the mechanics of the machining processes with various parameters determined. The aim of this work is to investigate the impact of swept angle optimization and their influence on the specific cutting energy in milling AISI 1045 steel alloy. This is achieved by varying the step over at different feed rate values in order to determine the optimization criterion for machining. It was observed that an optimum swept angle of 31.8o was appropriate in the elimination of ploughing effect and reducing the specific cutting energy to an optimised minimum value. However, higher swept angle of 41.4o increases the specific cutting energy with a higher machine tool power. This is attributable to the reduction in the cycle time caused by shorter toolpath length. The results obtained further elucidate the knowledge base for the determinations of optimum parameters for sustainable machining and resource efficiency of manufactured products.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128544534","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: 7
Design and Construction of a Sensorless Circuit for Brushless DC Motor using Third Harmonic back Electromotive Force 基于三次谐波反电动势的无刷直流电动机无传感器电路的设计与构建
International journal of engineering. Transactions A: basics Pub Date : 2017-02-09 DOI: 10.5829/idosi.ije.2017.30.04a.07
A. Siadatan, Sam Ghasemi, S. S. Shamsabad
{"title":"Design and Construction of a Sensorless Circuit for Brushless DC Motor using Third Harmonic back Electromotive Force","authors":"A. Siadatan, Sam Ghasemi, S. S. Shamsabad","doi":"10.5829/idosi.ije.2017.30.04a.07","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.07","url":null,"abstract":"In this paper the method of sensorless startup of direct current brushless motor using third harmonic back Electromotive Force (EMF) and motor startup using microcontroller for pulse width modulation, power switch control and motor output analysis is presented which renders RPM control and high speed achievement for motor. The microcontroller is used for processor and MOSFETs are used for power circuit. Besides, the motor does not have any sensors to detect rotor position. Furthermore, the microcontroller modulates pulse width, controls power circuit and analyses motor output. The innovation in this research is that the third harmonic function is used for motor control and is compared with the Back-EMF force to recognize zero crossing. Moreover, N-type MOSFETs are used in power circuit high side and low side which are useful in the current rate of MOSFETs due to their similarities. Also, the IR2101 MOSFET drive is utilized for startup which improves the firing time of MOSFETs. Besides, using tantalum capacitors and putting resistor by the gate route of MOSFETs is efficient. Finally, experimental results are given to verify the validation of the proposed method.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130080928","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
Pulsed DC- Plasma Assisted Chemical Vapor Deposition of α-rich Nanostructured Tantalum Film: Synthesis and Characterization 脉冲直流等离子体辅助化学气相沉积富α纳米结构钽薄膜:合成与表征
International journal of engineering. Transactions A: basics Pub Date : 2017-02-09 DOI: 10.5829/idosi.ije.2017.30.04a.13
H. Ghorbani, A. Abdollah-zadeh, A. Poladi, M. Hajian
{"title":"Pulsed DC- Plasma Assisted Chemical Vapor Deposition of α-rich Nanostructured Tantalum Film: Synthesis and Characterization","authors":"H. Ghorbani, A. Abdollah-zadeh, A. Poladi, M. Hajian","doi":"10.5829/idosi.ije.2017.30.04a.13","DOIUrl":"https://doi.org/10.5829/idosi.ije.2017.30.04a.13","url":null,"abstract":"This paper is an attempt to synthesize nanostructured tantalum films on medical grade AISI 316L stainless steel (SS) using pulsed DC plasma assisted chemical vapor deposition (PACVD). The impact of duty cycle (17-33%) and total pressure (3-10 torr) were studied using field emission scanning electron microscopy (FESEM), grazing incidence x-ray diffraction (GIXRD), nuclear reaction analysis (NRA), proton induced x-ray emission (PIXE) and Rockwell indentation methods. The optimized deposition conditions for making the best film characteristics in terms of deposition rate, purity and maximum α-phase was recognized. Also, the results showed that using a near stoichiometric TaN interlayer in this technique improves the film adhesion strength and considerably increases Ta film purity. The NRA analysis results indicated that the pulsed DC-PACVD is capable of producing Ta films with negligible amount of residual hydrogen which makes films needless to post bake treatment.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130577019","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
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