Mechanical Engineering eJournal最新文献

{"title":"Intelligent Street Light Services Based on LoRa","authors":"S. Mishra, Anurodh More, Mandar R. Nalavade","doi":"10.2139/ssrn.3645418","DOIUrl":"https://doi.org/10.2139/ssrn.3645418","url":null,"abstract":"In today’s generation, the Internet of things introduces a new set of services that can be implemented on the mobile network operator and offered to the end-user. In a local and wide area network, Wi-Fi or cellular communication is used but it consumes more battery power. Therefore, Long Range (LoRa), an emerging wireless technology developed by Semtech, has gained a lot of attention with the multitude of IoT applications which uses very little power, making it ideal for battery-operated devices. It examines for long-range communication performance in a large area. This study contemplates the prospect of implementing services of the \"Smart City\" concept. An increase in population and the corresponding growth of numerous roads have extended the number of street lights. These street lights consume a sufficient amount of energy. However, different perspectives have been presented for making systems energy efficient. This paper gives precise and practical implementation using LoRa and Light Dependent Resistor (LDR) to gather information.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131407390","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}

{"title":"Pid Controller Based Grid Connected Wind Turbine Energy System for Power Quality Improvement","authors":"Pathan Shabnam, A K Priyanka, T. V. Muni, S. Rajasekhar","doi":"10.31838/jcr.07.07.06","DOIUrl":"https://doi.org/10.31838/jcr.07.07.06","url":null,"abstract":"A thorough control of a breeze turbine framework associated with a mechanical plant with pid is talked about in this undertaking, where a calculation has been produced permitting a control structure that uses a four-leg inverter associated with the matrix side, to infuse the accessible vitality, just as to fill in as a functioning force channel, alleviating load current aggravations and improving force quality. A four-wire framework is considered with three stage and single-stage straight and nonlinear burdens. Amid the association of the breeze turbine, the utility side controller is intended to repay the unsettling influences caused in nearness of receptive, non-direct as well as lopsided single-and intra-stage loads, notwithstanding giving dynamic and responsive power as required. At the point when there is no wind control accessible, the controller is proposed to enhance the power quality utilizing the DC-connect capacitor with the power converter joined to the lattice. The fundamental contrast of the proposed technique as for others in the writing is that the proposed control structure depends on the Conservative Power Theory deteriorations. This decision gives decoupled power and current references for the inverter control, offering truly adaptable, particular and ground-breaking functionalities. Constant programming benchmarking has been directed so as to assess the execution of the proposed control calculation for full continuous usage. The control technique is actualized and approved in equipment on top of it (HIL) in view of Opal-RT and a TI DSP. The control system is actualized and approved in MATLAB/SIMULINK. The outcomes confirmed our capacity quality improvement control, and permitted to prohibit detached channels, adding to a progressively minimized, adaptable and solid electronic execution of a keen framework based control.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126693382","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}

{"title":"Development of an Intelligent Subsystem for Operating System Incidents Forecasting","authors":"V. Lakhno, Andriy Viktorovych Sagun, V. Khaidurov, Elena Panasko","doi":"10.15587/2706-5448.2020.202498","DOIUrl":"https://doi.org/10.15587/2706-5448.2020.202498","url":null,"abstract":"The object of research is a subsystem for prediction server platform’s incidents, which operates on the basis of the Windows OS family. One of the most problematic places when planning measures to prevent the harmful effects of network attacks such as dDOS, hardware failures etc for the server system is to obtain an effective model for predicting incidents of the operating system.<br><br>In the course of the research, methods of formation and research of the time series, exponential smoothing, elements of the theory of machine learning based on the method of group accounting (GMDH) are used. To obtain accurate and reliable forecasts of the operation of the intellectual subsystem for forecasting incidents, elements of the theory of heuristic self-organization and a specific implementation of this theory, the GMDH, are used. An algorithm is obtained and a software implementation of an intelligent system for predicting incidents of operating system operation and the main characteristics of its operation is developed. This became possible as a result of the analysis of the constructed model of the intruder, the system log of security incidents and the use of the GMDH. A mechanism is proposed for generating a sample of OS incident events based on the Windows system event log. The testing of the proposed forecasting system based on test samples allows to state that the forecasting results obtained with various settings of the machine learning system and parameters (degree of the reference polynomial, number of variables in the characteristic polynomial model, number of selection series) are satisfactory. As a result of applying the created algorithm for forecasting incidents of OS operation, it is shown that the use of a large number of polynomial models in GMDH allows one to obtain a forecasting system that is qualitatively superior to systems based on classical regression models and methods. Due to this, a much more accurate forecast can be obtained than the classical regression methods or the method of exponential smoothing, compared with similar methods. The percentage of false calculations using GMDH is less than 4 %.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125716327","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}

{"title":"Thermo-Economic Analysis of Vapour Absorption Refrigeration System for an Office","authors":"Kapil Patodi, Yash vardhan Mall, Yash Ghanshani, Rahul Kumar, N. Swarnkar","doi":"10.2139/ssrn.3584525","DOIUrl":"https://doi.org/10.2139/ssrn.3584525","url":null,"abstract":"Human comfort is considered to be a very important aspect of the modern lifestyle, the more the favourable condition of the room the better and comfortable a person feels thus Air conditioning is now being considered as a must for buildings, offices and homes. The air conditioning system can be optimized and can be built specifically for the required conditions of the space by designing an energy efficient and environment friendly refrigeration system as the thermal energy produced by burning the fossil fuels causes high CO2 emissions in the environment. Finding the heat load calculation helps in reducing the cost of building and maintaining the system it also helps in effective designing of the refrigeration system. Thus, in this paper we are calculating the overall heat load of an office, the total heat load of people, ventilation and infiltration, for calculating the amount of refrigeration required in the office. \u0000 \u0000This paper also aims to use the solar energy by using its thermal energy, which has zero ozone layer depletion potential and zero global warming potential. This paper would also deals with the idea about the economic constraints and the calculation of Solar based VARS to maintain a desired temperature in an office room having 5 occupants.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123994125","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}

{"title":"Solution of the System of Gas-Dynamic Equations for the Processes of Interaction of Vibrators With the Air","authors":"R. Antoshchenkov, А.А. Nikiforov, I. Galych, Victor Tolstolutskyi, V. Antoshchenkova, S. Diundik","doi":"10.15587/1729-4061.2020.198501","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.198501","url":null,"abstract":"The modern practice of using vibratory machines involving small seeds of low weight faces such an undesirable phenomenon as the effect exerted on the kinematics of vibrational movement of particles of fractions of the seed mixture by the aerodynamic forces and momenta. The periodic movement of air relative to the working planes of a vibratory machine arises due to fluctuations in the packets of these planes, which form flat aerodynamic channels. Consequently, the issues of studying the processes of interaction between the working bodies of vibratory machines and the air environment, aimed to justify their structural improvements, appear relevant. Existing mathematical models, which assess the parameters of air movement relative to the working planes of vibratory machines, produce only a generalized pattern and are flat. This paper proposes a statement, as well as an estimated finite difference scheme, of solving a three-dimensional boundary value problem on calculating the field of velocities and pressures in the region of air, located between two parallel synchronously oscillating planes. The problem employs a system of differential equations to describe the flow of the perfect gas. The finite difference scheme has been solved by a sweep method. Using the sweep method to solve these kinds of problems makes it possible to ensure the convergence and stability of estimation schemes, regardless of the step and other parameters of the grid applied. A variant of the calculation has been given, which demonstrated the feasibility of the proposed method for the assigned boundary conditions and parameters of the vibrational mode of machine operation. It has been established that in the working space enclosed between two oscillating planes there are both vertical (transverse) and horizontal (longitudinal) components of air velocity, which change over time","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133807886","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}

{"title":"What Will Be Popular Next? Predicting Hotspots in Two-mode Social Networks","authors":"Zhepeng Li, Yong Ge, Xue Bai","doi":"10.25300/misq/2021/15365","DOIUrl":"https://doi.org/10.25300/misq/2021/15365","url":null,"abstract":"In social networks, social foci are physical or virtual entities around which social individuals organize joint activities, for example, places and products (physical form) or opinions and services (virtual form). Forecasting which social foci will diffuse to more social individuals is important for managerial functions such as marketing and public management operations. Considering diffusive social adoptions, prior studies on user adoptive behavior in social networks have focused on single-item adoption in homogeneous networks. We advance this body of research by modeling scenarios with multi-item adoption and learning the relative propagation of social foci in concurrent social diffusions for online social networking platforms. To be specific, we distinguish two types of social nodes in our two-mode social network model: social foci and social actors. Based on social network theories, we identify and operationalize factors that drive social adoption within the two-mode social network. We also capture the interdependencies between social actors and social foci using a bilateral recursive process, specifically, a mutual reinforcement process that converges to an analytical form. Thus, we develop a gradient learning method based on mutual reinforcement process (GLMR) that targets the optimal parameter configuration for pairwise ranking of social diffusions. Further, we demonstrate analytical properties of the proposed method such as guaranteed convergence and the convergence rate. In the evaluation, we benchmark the proposed method against prevalent methods, and we demonstrate its superior performance using three real-world data sets that cover adoption of both physical and virtual entities in online social networking platforms.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115934851","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}

{"title":"AtsPy: Automated Time Series Forecasting in Python","authors":"Derek Snow","doi":"10.2139/ssrn.3580631","DOIUrl":"https://doi.org/10.2139/ssrn.3580631","url":null,"abstract":"This short report deals with the recent rise of programmatic time series methods. This decade has witnessed the proliferation of commercial and open source time-series tooling, which calls for an exposition of what is publicly available. In tandem with this survey, AtsPy, an open source automated time series framework is developed as a working prototype to showcase the ability of state of the art univariate time series methods.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124303866","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}

{"title":"Virtual Assistant for Visually Impaired","authors":"V. Sharma, Vishal Mahendra Singh, sharan thanneeru","doi":"10.2139/ssrn.3580035","DOIUrl":"https://doi.org/10.2139/ssrn.3580035","url":null,"abstract":"The field of artificial intelligence has led to various virtual assistants such as Siri in iPhone, Google Allo, Microsoft Cortana, and so on. Even after such progression, very little has been done to implement these technologies to assist the visually impaired community. Recognizing a person or distinguishing an object, these tasks are straightforward for common people but can be very difficult for people that are partly or completely blind. Their lives can be made smoother by assisting them to detect what is present in front of them at that instant. We aim to develop a system/assistant that will serve to guide a visually impaired person and will indicate the person by speaking through the earpiece. The system will help the person recognize people, add new faces and detect objects that are in their vicinity. We will have a mobile application which will consist of numerous deep learning models that will help applications increase its administration. The primary working of the system will consist of the camera continuously feeding images for inputs, the core system processing this input information and the earpiece acting as the output device to provide this output to the user.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117209259","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}

{"title":"Comparative Analysis of Two High-Speed Single-Phase Electrical Machines with Permanent Magnets on the Stator","authors":"V. Prakht, V. Dmitrievskii, V. Kazakbaev, S. Oshurbekov","doi":"10.20998/2074-272x.2020.2.03","DOIUrl":"https://doi.org/10.20998/2074-272x.2020.2.03","url":null,"abstract":"Purpose: Single-phase machines with permanent magnets on the rotor are widely used in a variety of applications of a low rated power. When these machines are applied in high-speed applications, a retaining ring on the rotor core must be often used. However, it makes the assembly more complex and the high-speed machines become more expensive. On the other hand, machines with magnets on the stator still can be a valuable alternative due to their simple and reliable rotor design. In this paper the comparative study of performances of two single-phase electrical machines with magnets on the stator (flux reversal electrical machine and hybrid switched reluctance machine) is presented. The following performances have been compared: efficiency, weight, active materials cost, value of rated current of switches of the frequency converter. <br><br>Methodology: Calculation of electrical machines performances using solving two-dimension boundary magnetostatics problems. Results. The theoretical comparison of the flux reversal electrical machine and the hybrid switched reluctance machine has been carried out; the comparison on specific torque and efficiency of the two aforementioned machines have been obtained. The flux reversal machine has a significantly higher efficiency and a fewer weight. In addition, it has a lower value of rated current. On the contrary, the cost of active materials of the hybrid switched reluctance one is much less. <br><br>Originality: The presented results can assist in selecting the best design alternative of electrical machines in the following applications: electrical blowers, household appliances, fans, pumps and compressors of a low rated power etc. <br><br>Practical value: The comparisons results of the flux reversal electrical machine and the hybrid switched reluctance machine has been obtained for the first time.<br>","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130371336","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}

{"title":"Design and Fabrication of Trio Tube Heat Exchanger Experimental Setup","authors":"D. Yadav, A. Kushwaha, Anuj Mishra","doi":"10.2139/ssrn.3576468","DOIUrl":"https://doi.org/10.2139/ssrn.3576468","url":null,"abstract":"In this work, an experimental setup for trio tube heat exchanger is designed and fabricated. The experimental setup is comprises of aluminum (inner tube 12.7 mm) and copper (intermediate tube 25.4 mm) and GI tube (outer tube 38.1 mm). The effective length of the heat exchanger is 2.1 m. For the hot fluid, a 2000 W capacity immersion heater was used to raise the temperature of the water. In this experimental setup, heat can be transferred between three liquids. Which is it’sspecial competence over the double tube heat exchanger. Three different flow arrangements can be maintained in the heat exchanger; N-H-C, C-H-C and C-H-N. The performance of the experimental setup was initially tested for water. The measurements were taken at 50 ℃ temperature of hot water and 30℃ of the other two water streams at the inlet. The experiments were conducted for counter flow arrangements of fluid streams so that the performance of the heat exchanger can be checked at the maximum amount of heat extraction from hot water. The temperature variation along the length of the heat exchanger was analyzed, the graphs are in good agreement with the standard graphs.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121976172","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}