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GEOMETRICAL ANALYSIS OF NON-LINEAR CURVATURE TRANSITION CURVES OF HIGH SPEED RAILWAYS 高速铁路非线性曲率过渡曲线的几何分析
Asian Journal of Current Engineering and Maths Pub Date : 2016-08-20 DOI: 10.15520/AJCEM.2016.VOL5.ISS4.58.PP
Saiid Shebl
{"title":"GEOMETRICAL ANALYSIS OF NON-LINEAR CURVATURE TRANSITION CURVES OF HIGH SPEED RAILWAYS","authors":"Saiid Shebl","doi":"10.15520/AJCEM.2016.VOL5.ISS4.58.PP","DOIUrl":"https://doi.org/10.15520/AJCEM.2016.VOL5.ISS4.58.PP","url":null,"abstract":"The transition curves in the modern railway construction are route elements equally crucial as alignment and tracking. For high speed routes, in order to prevent a sudden change of the centrifugal force , the nonlinear curvature transition curve must be applied due to the impact of the motion in a sharp curve. This article proposes a new curve representing transition curve as a polynomial non - linear curvature transition curve which is considered as a remodeling of the third degree parabolic non – linear transition curve.Formulation of the curve relies on a pre – valuation of the lateral shock such that it increases gradually to the maximum value at the midpoint, then decreases gradually and tangent to x – axis at both the start and end points.Various transition curves adjusted for the high speed railways tracks, including the proposed one, are geometrically examined for the purpose of studying the possibility of considering such transition curves in high speed railways network. The concerned curves are the new and these needed to be optimized, which are designed for high speed up to 350 km/h.Based on the enhancement of the effect of the dynamical elements, i. e. lateral shock, curvature and lateral displacement, the comparative study cited from the geometrical analysis assured that he second degree parabolic non – linear and the proposed transition curve are the most relevant curves to be connected to the railways routes.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124085894","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
Analytical solution of the nonlinear initial value problem in one-stage thermophilic bioremediation process for the treatment of cheese whey 干酪乳清单阶段嗜热生物修复过程非线性初值问题的解析解
Asian Journal of Current Engineering and Maths Pub Date : 2016-08-06 DOI: 10.15520/AJCEM.2016.VOL5.ISS4.57.PP44-51
S. P. L. R. R.Ashokan
{"title":"Analytical solution of the nonlinear initial value problem in one-stage thermophilic bioremediation process for the treatment of cheese whey","authors":"S. P. L. R. R.Ashokan","doi":"10.15520/AJCEM.2016.VOL5.ISS4.57.PP44-51","DOIUrl":"https://doi.org/10.15520/AJCEM.2016.VOL5.ISS4.57.PP44-51","url":null,"abstract":"A mathematical model for thermophilic cheese whey bioremediation in a one- stage process is presented. The model is based on system of reaction diffusion equations containing a nonlinear term related to Michaelis-Menten kinetics of the enzymatic reaction. We present the approximate analytical solution the nonlinear differential equations that describe the rate of reaction coupled with a Michaelis-Menten kinetics law. The simple and closed form of analytical expressions for the concentrations of biomass, lactose, lactate, acetate have been derived by using new homotopy perturbation method for all values of parameter.  These results are compared with simulation results and are found to be in good agreement. The obtained results are valid for the whole solution domain.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114873450","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
Capacity enhancement and Performance evaluation in 4G LTE-Advanced networks using Sectored Relaying 使用扇区中继的4G LTE-Advanced网络的容量增强和性能评估
Asian Journal of Current Engineering and Maths Pub Date : 2016-02-25 DOI: 10.15520/ajcem.2016.vol5.iss1.45.pp12-16
M. Amin
{"title":"Capacity enhancement and Performance evaluation in 4G LTE-Advanced networks using Sectored Relaying","authors":"M. Amin","doi":"10.15520/ajcem.2016.vol5.iss1.45.pp12-16","DOIUrl":"https://doi.org/10.15520/ajcem.2016.vol5.iss1.45.pp12-16","url":null,"abstract":"Cell interference and coverage shortage of base stations result in low Signal to Interference plus Noise Ratio (SINR) and poor spectral efficiency. To overcome these problems in 4G LTE-Advanced networks – A new method of capacity enhancement and performance evaluation using Sectored Relaying is proposed in this paper. The main focus is laid on the selection of the location for the relay node (RN) in the cellular network so that Access Link attains much improved performance in terms of throughput capacity and Signal to Interference plus Noise Ratio (SINR) besides improving the quality of wireless relay backhaul link. A mathematical model of the proposed system in terms of throughput capacity, path loss attenuation and Access Link SINR has been developed. The Mathematical Modeling of the proposed system has been verified by the simulations carried on Matlab 14. A significant improvement has been observed from the results, which justify the need for sectored relaying in relay enhanced networks. The parameters for simulation have been used in accordance with 4G LTE standard. Moreover, it has been observed that the proposed technique has lesser complexity with minimal deployment expenditure and performs better than the existing techniques.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131988004","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
Harmonic Elimination And Power Factor Correction Using Space Vector Modulation 利用空间矢量调制进行谐波消除和功率因数校正
Asian Journal of Current Engineering and Maths Pub Date : 2015-12-12 DOI: 10.15520/AJCEM.2015.VOL4.ISS6.41.PP83-87
Pawan Kumar
{"title":"Harmonic Elimination And Power Factor Correction Using Space Vector Modulation","authors":"Pawan Kumar","doi":"10.15520/AJCEM.2015.VOL4.ISS6.41.PP83-87","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS6.41.PP83-87","url":null,"abstract":"This paper analysis the harmonics elimination and improve the power quality by using space vector modulation. The voltage   and current harmonics are produced by nonlinear loads that increase the power losses and a negative effect on electric utility supply systems and apparatus. This paper presents the application of Space Vector Pulse Width Modulation for shunt active power filters .The most important part of  the active power filters is generating of gate signal for inverters to improve the power factor and to reduce current and voltage distortion to standard limits. The simulation results through Matlab shows that the output of the effective current compensation.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127543826","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
A ZVS Technique Implemented inInverter By Using Cycloconverter for variable frequency Application 一种利用环变换器实现变频ZVS技术的方法
Asian Journal of Current Engineering and Maths Pub Date : 2015-12-12 DOI: 10.15520/ajcem.2015.vol4.iss6.42.pp88-91
S. Priya
{"title":"A ZVS Technique Implemented inInverter By Using Cycloconverter for variable frequency Application","authors":"S. Priya","doi":"10.15520/ajcem.2015.vol4.iss6.42.pp88-91","DOIUrl":"https://doi.org/10.15520/ajcem.2015.vol4.iss6.42.pp88-91","url":null,"abstract":"The voltage source full-bridge DC-AC converter with PWM technique using a step down Cycloconverter is implemented. The zero-voltage switching (ZVS) commutation for full-bridge high frequency inverter active power switches and the Cycloconverter bi-directional switches are obtained. Soft switching operation is provided in a wide range of voltage regulation without utilizing an auxiliary inductor in the primary side of an isolating transformer. The transformer size and filter components value is reduced by using high frequency inverter. Therefore switching losses in the circuit can be reduced and output voltage is regulated. Based on the simulation and experimental results, the steady-state operation principles of the converter are analyzed.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114806521","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
Short-Term Multi-Cell Dynamic Artifice Appropriation in Future Cellular Networks 未来蜂窝网络中的短期多小区动态技术占用
Asian Journal of Current Engineering and Maths Pub Date : 2015-12-12 DOI: 10.15520/AJCEM.2015.VOL4.ISS6.40.PP69-77
K. Kumar
{"title":"Short-Term Multi-Cell Dynamic Artifice Appropriation in Future Cellular Networks","authors":"K. Kumar","doi":"10.15520/AJCEM.2015.VOL4.ISS6.40.PP69-77","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS6.40.PP69-77","url":null,"abstract":"In future cellular system, it is becoming more challenging to optimize the radio resource management and maximize the system capacity whilst meeting the required quality of service from user's point of view. Traditional schemes have approached this problem mainly focusing on resources within a cell and to large extent ignoring effects of multi-cell architecture. For multi-cell systems employing intra-cell orthogonal communication channels, inter-cell interference mitigation techniques are expected to be one of the key radio resource management functions. In this paper, we propose a multi-cell coordinated and un-coordinated dynamic resource sharing algorithms and reuse techniques among base station/ relay station cells. The sub carrier allocation and power allocation are performed on the basic of sum-rate maximization, by considering the load over the cell (3-sector cell). The simulation results show the performance comparison between both coordinated and un-coordinated Artifice Appropriation schemes with different sum-rate maximization algorithms.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132873896","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
Mathematical Modeling Of Sepic Converter With Continuous Conduction Mode (CCM) For Solar Maximum Power Tracking Application 用于太阳能最大功率跟踪的连续导通模式(CCM) Sepic变换器的数学建模
Asian Journal of Current Engineering and Maths Pub Date : 2015-12-12 DOI: 10.15520/AJCEM.2015.VOL4.ISS6.36.PP78-82
M. Savio
{"title":"Mathematical Modeling Of Sepic Converter With Continuous Conduction Mode (CCM) For Solar Maximum Power Tracking Application","authors":"M. Savio","doi":"10.15520/AJCEM.2015.VOL4.ISS6.36.PP78-82","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS6.36.PP78-82","url":null,"abstract":"In this paper, a single ended primary-inductor converter (SEPIC) is applied for the solar power application. The solar power is tracked electrically using DC-DC converter such that the maximum power is extracted from the solar panel throughout its operation. The proposed converter uses a single inductor to allow a continuous-conduction mode by making the current never fall to zero. The proposed converter is controlled using the fuzzy logic controller that operates both in buck and the boost operation; unlike the conventional methods the output is non-inverted. The SEPI Converter used is more applicable for the maximum power tracking method because the output of the SEPIC is independent of the input voltage as the average current through the inductor is same as the load current. The proposed method is simulated using the MATLAB program. An experimental verification is done for a DC motor operated by Fuzzy controlled SEPIC and the results are shown","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116747022","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
FIRST PRINCIPLE STUDY: OPTICAL PROPERTIES OF CH3NH3PBI3 AND CH3NH3SNI3 FOR PEROVSKITE PHOTOVOLTAICS 第一性原理研究:ch3nh3pbi3和ch3nh3sni3用于钙钛矿光伏的光学性质
Asian Journal of Current Engineering and Maths Pub Date : 2015-10-22 DOI: 10.15520/AJCEM.2015.VOL4.ISS5.37.PP49-55
Ge Yu
{"title":"FIRST PRINCIPLE STUDY: OPTICAL PROPERTIES OF CH3NH3PBI3 AND CH3NH3SNI3 FOR PEROVSKITE PHOTOVOLTAICS","authors":"Ge Yu","doi":"10.15520/AJCEM.2015.VOL4.ISS5.37.PP49-55","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS5.37.PP49-55","url":null,"abstract":"Tetragonal perovskite structure of methyl-ammonium metal iodide CH 3 NH 3 MI 3 (M=Sn, Pb) was investigated, with space group of #99 with P4mm, lattice parameter of a = b = 6.6718A, c = 6.4101A, bond angle of α = β = γ = 90˚.  The electronic structure, parital density of states (DOS) and optical calculations were performed, with generalized gradient approximations (GGA). These investigations were carried out using ab initio density functional theory (DFT) calculations. To conclude, the direct bandgap was opened up to 1.9eV (Sn=0.2). We obtained a comprehensive data set, not to mention the optical absorption, with the peak value reported to be 358.2eV (Sn=302.9), but also the conductivity, reflectivity, refractive index and the electron loss function. This will be useful to experimentalist, in fabrication of an enhanced solar cell.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127807784","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
Use of Linear Programming Model in the Training of Human Resources in Engineering Institutes of Bhopal 线性规划模型在博帕尔工程学院人力资源培训中的应用
Asian Journal of Current Engineering and Maths Pub Date : 2015-08-24 DOI: 10.15520/AJCEM.2015.VOL4.ISS4.32.PP46-48
Sanjay Patidar
{"title":"Use of Linear Programming Model in the Training of Human Resources in Engineering Institutes of Bhopal","authors":"Sanjay Patidar","doi":"10.15520/AJCEM.2015.VOL4.ISS4.32.PP46-48","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS4.32.PP46-48","url":null,"abstract":"The success and failure that an individual or organisation experiences, depends to a large extent on the ability of making appropriate decision. Making of a decision requires an enumeration of feasible and viable alternatives (course of action or strategies). To embark on the developments/application of specific operations research techniques to determine the optimal choice among several courses of action, which will include numerical values (if required), linear programming as a tool of operations research may be employed where there is a need to formulate a mathematical model to represent the problem at hand allocate the scarce/limited resources to several competing activity for optimality. This piece of work has employed the application of linear programming in the area of personnel management in minimizing the cost of staff training. The method gives an integer optimum solution to all the models formulated. Data collected may not yield a feasible solution, when this occurs the model needs to be reformed to give an optimum solution. However, this study helps  management of the Institute  ,the number of staff (junior and senior) to be sent for training program when there is need for such in the academic and non-academic sections of the institution.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125739720","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
Implementation of Efficient Probabilistic Symmetric Key Encryption Method 一种高效概率对称密钥加密方法的实现
Asian Journal of Current Engineering and Maths Pub Date : 2015-06-30 DOI: 10.15520/AJCEM.2015.VOL4.ISS3.29.PP33-36
Apoorva Hora
{"title":"Implementation of Efficient Probabilistic Symmetric Key Encryption Method","authors":"Apoorva Hora","doi":"10.15520/AJCEM.2015.VOL4.ISS3.29.PP33-36","DOIUrl":"https://doi.org/10.15520/AJCEM.2015.VOL4.ISS3.29.PP33-36","url":null,"abstract":"This paper covers the implementation of efficient probabilistic symmetric key encryption using International Data Encryption Algorithm (IDEA). The current era has seen an explosive growth in communication. Applications like online banking, personal digital assistants, mobile communication, smartcards, etc. have emphasized the need for security in resource constrained environment. International Data Encryption Algorithm (IDEA) cryptography serves as a perfect encryption tool because of its 128 bits key sizes and high security comparable to that of other algorithms. However, to match the ever increasing requirement for speed in today’s applications, hardware acceleration of the cryptographic algorithms is a necessity. This study presents an efficient hardware structure for the modulo (2 n + 1) Multiplier and modulo(2 n ) adder which is the most time and space consuming operation in IDEA. The proposed design saves more time, area and cost. The block size considered here is same as of traditional IDEA encryption algorithm which is of 64 bits with 16 bit sub-blocks.","PeriodicalId":173381,"journal":{"name":"Asian Journal of Current Engineering and Maths","volume":"16 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114133871","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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