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نتیجه جستجو - Electrical Engineering

تعداد مقالات یافته شده: 14
ردیف عنوان نوع
1 Next generation material interfaces for neural engineering
واسط های مواد نسل بعدی برای مهندسی عصبی-2021
Neural implant technology is rapidly progressing, and gaining broad interest in research fields such as electrical engineering, materials science, neurobiology, and data science. As the potential applications of neural devices have increased, new technologies to make neural intervention longer-lasting and less invasive have brought attention to neural interface engineering. This review will focus on recent developments in materials for neural implants, highlighting new technologies in the fields of soft electrodes, mechanical and chemical engineering of interface coatings, and remotely powered devices. In this context, novel implantation strategies, manufacturing methods, and combinatorial device functions will also be discussed.
مقاله انگلیسی
2 The relationship between syntactic complexity and rhetorical move-steps in research article introductions: Variation among four social science and engineering disciplines
رابطه پیچیدگی نحوی و گام‌های حرکت بلاغی در مقدمه‌های مقاله پژوهشی: تنوع در میان چهار رشته علوم اجتماعی و مهندسی-2021
This study investigates disciplinary variation in the relationship between syntactic complexity and rhetorical move-steps in research article (RA) introductions. Our data consisted of the introduction sections of 400 published RAs in two core social science disciplines, Anthropology and Sociology, and two core engineering disciplines, Chemical Engineering and Electrical Engineering. Each sample was manually annotated for rhetorical move-steps using an adapted version of Swales’ (2004) revised Create a Research Space model and assessed for syntactic complexity using multiple measures of global complexity, finite subordination, clausal elaboration, and phrasal complexity. Our results revealed significant disciplinary variation in terms of the syntactic complexity of sentences realizing each of six rhetorical move-steps commonly found in RA introductions. Our findings contribute to the emerging understanding of disciplinary variation in function-form mappings in RA writing and have useful implications for genre-based academic writing research and pedagogy.
Keywords: Academic writing | Disciplinary variation | Function-form mappings | Genre analysis | Linguistic features | Rhetorical goals
مقاله انگلیسی
3 Abundant traveling wave solutions to an intrinsic fractional discrete nonlinear electrical transmission line
Abundant traveling wave solutions to an intrinsic fractional discrete nonlinear electrical transmission line-2021
The main idea of this paper is to search for all traveling wave solutions to an intrinsic fractional discrete nonlinear electrical transmission line, which plays a essential role in obtaining the new insights in nonlinear voltage dynamics. We first give a brief introduction how to transform the discrete system into a continuous one, which is described by a fractional-order partial differential equation. After that, this equation is handled by conformable fractional transformation and the complete discrimination system for polynomial method (CDSPM). By applying the advanced method, the whole of the exact traveling wave solutions emerged in existing articles are obtained, especially we obtain the solitary wave solutions and elliptic functions solutions which are hardly founded by other methods. Notably, the elliptic functions solutions in rational form are discovered for the first time. Finally, the electrical characteristics and the fractional nature are revealed via graphical represents. By the depicted graphs, we intuitively observe the existence of the phenomena for periodic wave and solitary wave, and the time-fractional derivative is proved do has important influence on the behaviors of the solutions. Considering the significance of the nonlinear electrical transmission line, the acquired results would have wide application in electrical engineering and nonlinear voltage dynamics, liking analyzing and predicting the complex voltage wave propagation phenomenon in realistic electrical transmission system.
Keywords: Electrical transmission line | Traveling wave solutions | Conformable fractional transformation | The complete discrimination system for polynomial method
مقاله انگلیسی
4 Assisted development process for model-based systems engineering
فرآیند توسعه کمکی برای مهندسی سیستم های مبتنی بر مدل-2021
The system development process is becoming increasingly complex as the systems themselves become more and more complex. At the same time, the various disciplines such as mechanical engineering, electrical engineering and software engineering are becoming increasingly intermixed, so that companies in one discipline are experiencing leaps and bounds in the complexity of their systems and their development. For this reason, this publication presents a concept of a virtual assistant that leads through a development phase. It shows that the software supporting the development needs an information model to store the data of the developed system and to connect it with the existing knowledge. This knowledge can either be available internally or on the web. The development process should therefore support cooperation so that the assistance software and engineers interact with each other.
Keywords: Model-based Systems Engineering | chatbots | virtual assistants | development process | conversation logic
مقاله انگلیسی
5 Nanotechnology applied for improving research in electrical domain - a survey
کاربرد نانوتکنولوژی برای بهبود تحقیقات در حوزه الکتریکی - یک مرور-2021
Research activities in the field of nanotechnology have paved way to improvisation and progress in various fields globally. Since its tremendous development, it has extended its hands in almost all domains and in the past few decades it has also been a foundation for new technological advancement in electrical domain in particular. This field has given the way in development of new materials which has really improved the electrical characteristics like dielectric, insulation of materials which are conventionally used and therefore enhanced their performances in various applications. This paper tries to bring out a glimpse of its applications in past developments and future opportunities listed by various authors particularly in the field of electrical engineering.
Keywords: Electrical machine | Transformer | Nanotechnology
مقاله انگلیسی
6 Stable soliton solutions to the nonlinear low-pass electrical transmission lines and the Cahn-Allen equation
راه حل های سالیتون پایدار برای خطوط انتقال الکتریکی غیرخطی کم گذر و معادله کان آلن-2021
The low-pass nonlinear electrical transmission lines and the Cahn-Allen equation are important nonlinear model equations to figure out different tangible systems, namely, electrical engineering, fluid dynamics etc. The contrivance of this study is to introduce advanced Bernoulli sub-equation function method to search for stable and effective solitary solutions of the described wave equations. Stable solitary solutions are reported as an integration of exponential functions, hyperbolic functions, etc., and the graphical implications for specific values of the corresponding parameters are explained in the solutions obtained in order to uncover the inmost structure of the tangible phenomena. It is establish that the IBSEF method is reliable, contented and might be used in further works to found ample novel soliton solutions for other types of NLEEs arising in physical science and engineering.
Keywords: IBSEF method | The low-pass electrical transmission lines | Cahn-Allen equation | Soliton solutions
مقاله انگلیسی
7 Advances in Electrical Engineering, Electronics and Energy: Global Developments in New Energy Technologies and Development of Energy Technology from the Micro to the Macro-Scale
پیشرفت‌ها در مهندسی برق، الکترونیک و انرژی: تحولات جهانی در فناوری‌های انرژی جدید و توسعه فناوری انرژی از مقیاس خرد تا مقیاس کلان-2021
Global warming and increasingly severe weather events have given a new and increasingly urgent focus to energy technology. Currently there is major growth in novel technologies such as energy harvesting, self-powering wearable devices, and options enabling a move to a post carbon future using a range of advanced materials (for example, carbon-based nanomaterials), especially for low power devices. By contrast, large thermal energy development is focused on either using renewable energy or developing thermal boilers with high electrical efficiency and low emissions. Electrical energy efficiency of 50% or more is increasingly being held out as feasible in the next several decades. However, most of these advancements concerning large boilers depend heavily on materials development, which can be an extremely slow process. Genuinely new approaches which might include improved fusion energy technology, or ultra large batteries, or even devices built on systems employing superconductivity are also possible, although it seems unlikely that any such technologies will play a critical role in achieving greenhouse goals in the next decade, but they might well become important to achieve 2050 targets. Renewables remain one of the most promising frontiers, but they need to be made cheaper and combined with better energy storage.
مقاله انگلیسی
8 Electrical discharges in ferrofluids based on mineral oil and novel gas-to-liquid oil
تخلیه الکتریکی در فروسیال های مبتنی بر روغن معدنی و نفت جدید گاز به مایع-2021
Ferrofluids consisting of stabilized iron oxide nanoparticles and insulating oils have emerged as a promising substitute for liquid dielectrics in electrical engineering applications. Recent enhancements of electrical insulating liquids rely on preparation of ferrofluids on emerging insulating oils available on the market. The present work reports on a comparative experimental study of insulating properties of a conventional mineral oil (MO)- based ferrofluid and a ferrofluid based on novel insulating oil produced by a gas-to-liquid (GTL) technology. The ferrofluids prepared on the two oils are subjected to rigorous experimental investigation of dielectric breakdown and partial discharges. The experiments are conducted on 4 MO-and 4 GTL-based ferrofluids with equal concentrations of magnetite nanoparticles. Measurements of partial discharges according to IEC 60270 are complemented with high frame–rate photography with positive streamer analysis. Based on the statistical analysis, it is found that MO-based ferrofluids exhibit superior breakdown performance to GTL-based ferrofluids, even though the pure GTL oil exhibits slightly higher mean breakdown voltage than the pure MO. A deeper analysis revealed a significantly greater number of partial discharges in GTL ferrofluids. The positive streamer size is lowered with increasing nanoparticle concentration only in MO-based nanofluids. Differences in the physical properties of the two oils, such as density, viscosity and permittivity, are considered in the interpretation of the different dielectric performance of the two ferrofluids. The experimental comparison leads to better understanding of the breakdown mechanism, and lay the foundations for proper selection of physical properties of a base oil for high performance insulating ferrofluids.
Keywords: Magnetic nanoparticles | Ferrofluids | Non-polar liquid | Dielectric breakdown | Partial discharge | Insulating material
مقاله انگلیسی
9 A brief review on recent development of multidisciplinary engineering in fermentation of Saccharomyces cerevisiae
مروری کوتاه بر توسعه اخیر مهندسی چند رشته ای در تخمیر ساکارومایسس سرویزیه-2021
Fermentation technology has unprecedented potential to upgrade state-of-art biotechnology and refine the processes used in existing ones, taking into account of complex technical, economic and environmental factors. Given the economic importance and ongoing challenges of biotech sector, multidisciplinary engineering technologies is poised to become an increasingly important tool along with the emergence of modern technology and innovation. This article reviews recent technology advancement in the field of fermentation using Saccharomyces cerevisiae. Interesting research progress has been made by leveraging multiple engineering fields such as electrical engineering, information engineering, electrochemical engineering and new material development, leading to recent development of novel real-time probes (electronic nose technology, analysis of yeast morphology and metabolites, timely control of glucose feed), improved understanding of electro-fermentation (enhanced electronic transfer provision), as well as application of cost-effective and sustainable materials (bioreactor vessel manufactured from textile, and yeast immobilization support matrix made from abundant natural biomass). To the best of our knowledge, the subject is reviewed for the first time in recent years. Furthermore, this review also constitutes a futuristic S. cerevisiae fermentation process based on the recent advancement discussed.
Keywords: Probes | Bioprocess | Electro-fermentation | Materials | Process analytical technology
مقاله انگلیسی
10 Power network robustness analysis based on electrical engineering and complex network theory
تجزیه و تحلیل استحکام شبکه قدرت بر اساس مهندسی برق و نظریه شبکه پیچیده-2021
The growing importance of power systems in the development of modern society has increasingly focused the attention on the various dangers to which these systems are exposed. This paper proposes a robust analysis framework based on complex network theory with the aim of exploring the robustness of the power system from a methodological perspective. The analysis framework establishes three models: a purely topological model, an artificial flow model, and a direct current power flow model to analyze the power system structure and functional robustness. We present different analysis metrics under different models, simulate three fault scenarios, and conduct an evaluation and analysis. The validity of the evaluation analysis was further verified by adopting IEEE300 and two randomly generated 1000-node network models that meet the characteristics of small world and scale, respectively, for detailed robustness analysis. The results show that the proposed method can effectively analyze a power system from the perspectives of pure topology, artificial flow, and direct current power flow. The case analysis based on the IEEE300 network and systems with different network characteristics proves that the framework is effective for the evaluation of power systems with different characteristics.
Keywords: Power network | Robustness | Topological model | Artificial flow | Direct current power flow
مقاله انگلیسی
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