آتوماتای سلولی کوانتومی (QCA) نوعی فن آوری محاسباتی است که جهت ساخت مدارهایی در ابعاد نانو به کار برده می‌شود. با کاهش ابعاد قطعات، حساسیت مدار بیشتر شده و مدارهای کوانتومی نسبت به وقوع عیوب و تشعشعات محیط آسیب پذیرتر هستند. دو دروازه پایه در این فن آوری دروازه معکوس کننده و دروازه اکثریت هستند که بیشتر مدارها بر پایه این دو ساخته می شوند. در این مقاله دروازه‌ اکثریت هفت ورودی در QCA طراحی می شود، به گونه ای که حداقل سربار به مدار تحمیل شود. استفاده از دروازه اکثریت با ورودی های بیشتر باعث کاهش تعداد سلول ها، تاخیر و پیچیدگی در مدار QCA می شود. هرچند شاید ضرورت استفاده از دروازه هفت ورودی هنوز چندان احساس نمی شود. گیت پیشنهادی در این مقاله با 19سلول کوانتومی در فضای اشغالی 24564 نانومتر مربع در یک لایه و با یک فاز کلاک طراحی شده است. سپس تعدادی از دروازه های منطقی از جمله دروازه های منطقی "و" و"یا" چهار ورودی، دروازه "نقیض یای انحصاری" و "یای انحصاری" دو ورودی، دروازه"یای انحصاری" سه ورودی و تمام جمع کننده چند بیتی را با استفاده از دروازه هفت ورودی پیشنهادی طراحی و پیاده سازی می شود. جمع کننده پیشنهادی با دروازه اکثریت هفت ورودی و یک دروازه اکثریت سه ورودی تحمل پذیر اشکال، طراحی شده است. پس می توان گفت که جمع کننده طراحی شده تا حدودی تحمل پذیر اشکال است یعنی در برابر خطاهایی که در این فن آوری رخ می دهد تا حدودی تحمل پذیر است. سپس از نرم افزار QCAPro برای تجزیه و تحلیل توان مصرفی دروازه پیشنهادی استفاده شده و در ادامه عملکرد مدار با استفاده از نرم افزار شبیه ساز آتوماتای سلولی کوانتومی QCADesigner 2.0.3 مورد ارزیابی قرار گرفته است. پرونده مقاله

In the high voltage (HV) electrical power systems, different materials are used as the role of insulation to protect the incipient failure inside the HV power equipments. One of the common phenomenas in insulations is Partial Discharge (PD). Because of the high voltage stress, the weak section inside the insulator causes the partial discharge (PD), which is known as a local electrical breakdown. The maximum amplitude of PD could accelerate the destruction process of insulation material. Also, during practical applications in the power systems, voltages with different levels are used or created suddenly. Therefore, it is necessary to analyze the effect of voltage characteristics on the PD. In this paper, the effect of DC, AC and impulse voltage on the maximum amplitude of PD are studied within the MATLAB Simulink platform. Finally, to show the effect of each voltage level on the PD, results are compared with each other in the single and multi cavity situations. The test materials for this research are epoxy resin and oil-impregnated paper. Also, this paper provides a comparison between two different insulation materials. پرونده مقاله

A new method for decreasing the number of Quantum Dot Cells in Quantum Dot Cellular Automata (QCA) circuits is presented. The proposed method is based on physical modeling between electrons. Correctness of presented method is proved using some physical proofs. Our method is useful for QCA circuits with many inverter gates. It should be noted that in order to achieve more stability, the potential energy of QCA electrons reach the minimum level. The proposed approach can be used for designing any QCA arithmetic circuit. پرونده مقاله

Improvements in information technology have contributed to the development of the e-banking industry. Specifically, despite the reduction of bank charges, e-banking is one of the payment methods that, by employing it based on valid theory, can be successful in satisfying customers due to the easiness of access to financial transactions at any time and place with minimum required tools. A mobile device imposes an increasing amount of time, energy and expense in comparison with face-to-face visits. In spite of many benefits this channel has for customers, there are security concerns for service providers and users in the banking sector. Consequently, in this inquiry, the focus is on the role of the support vector machine neural network in the classification of Mellat mobile transactions. To implement the intended procedure, after compiling the information in the preprocessing stage and purification and normalization of data, feature selection is done with the main component analysis algorithm. Then, in post-processing stage, the Neural Network supports the Mobile Banking classification as a safe but fake system. In order to compare the suggested method, we use Bayon floors and multilayer perceptron. The outcomes demonstrate that the support vector machine neural network can fulfill the classification of user’s mobile banking transaction with a mean square error of 0.216 and a precision of 94.6% of all data. پرونده مقاله

VANETs are a subset of MANETs in which vehicles are considered as network nodes. These networks have been created to communicate between vehicle and traffic control on the roads. VANETs have similar features to MANETs, and their main special property is the high-speed node mobility which makes a quick-change topology in the network. The rapid change of network topology is a major challenge in routing. One of the well-known routing protocols in VANETs is the AODV routing protocol. In this inquiry, nature-inspired algorithms such as GOA and GA are used to improve routing in VANETs to search the optimal configuration of the AODV routing protocol, and its impact on network evaluation criteria has been investigated. The ratingmeasuresapplied in this research are the packet delivery ratio, end-to-end delays, and normalized routing load. پرونده مقاله

This paper explains fault tolerance techniques for Quantum-dot cellular automata which offer remarkable robustness to implement QCA arithmetic circuits. It begins with a study of QCA based design. A classification for fault types is presented and some fault tolerance techniques are examined and their relevance for QCA circuits is evaluated. Finally, it is concluded that a combination of two or more hardware redundancy techniques is needed for tolerating faults in QCA circuits and systems. The proper functionality of the presented design is checked by computer simulations using the QCADesigner tool. Simulation results confirm our claims and their usefulness in designing robust digital circuits. پرونده مقاله