Mechanical Engineering eJournal最新文献

{"title":"Deep Learning as Applied to Wireless Networks: A Review","authors":"Shewangi Kochhar, R. Garg","doi":"10.2139/ssrn.3736467","DOIUrl":"https://doi.org/10.2139/ssrn.3736467","url":null,"abstract":"The rapid development in the domain of wireless communication and high traffic of mobile data led to introduce an advanced model called Deep Learning (DL). It has been proposed in the literature, which is a subset of Machine learning. It is a technology that is considered to be an evolution for mobile data traffic management. A large amount of heterogeneous data is generated by wireless systems which is difficult to compute so to control such data various optimization tools are discussed. DL makes wireless communication more intelligent and versatile. Here, a review of the DL platform and different techniques to enable DL in wireless communications is summarized. There are different domains in wireless networking like networking, routing, and scheduling in which DL is employed. All such domains are discussed in this paper. Further different optimization techniques and recent advancement in this area were discussed.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115398165","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":"Trauma Identification Using Image Processing and FeedForward Neural Network","authors":"S. R","doi":"10.2139/ssrn.3734767","DOIUrl":"https://doi.org/10.2139/ssrn.3734767","url":null,"abstract":"Trauma is identified as the mental state of the person who has come across some pathetic situation like flood, accidents etc. But those people cannot be identified as they will be affected mentally, but they look and behave like a normal human being, but the thing here is when they are going to face the same situation or think about the same situation again and again the problem comes and they go for the PTSD. This work mainly aims in identify those persons at their initial state itself, which greatly helps in giving them medical help before they go with PTSD state.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126088346","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":"Error Correction LDPC Encoder with Bit-Flipping Decoder","authors":"Sowmya K B, Rahul Raj D N, Sandesh Shetty","doi":"10.2139/ssrn.3734155","DOIUrl":"https://doi.org/10.2139/ssrn.3734155","url":null,"abstract":"The communication method conveys information from the transmitter to the receiver over an intermediate medium. The competence of received information is determined by medium and clatter. There is a great need for robust error correction techniques with ever accumulative usage of wireless expedients such as portable electronic items and broadband modems. Wireless communication schemes depend on advanced error rectification techniques for their suitable functioning. Hence transferring and getting information with less or without error, while utilizing the accessible bandwidth is a foremost proposal, project necessities for present digital wireless communication systems comprising of high throughput, low power consumption, and less area. In this article, the functional analysis is performed for error control coding technique i.e., Low-Density-Parity-Check (LDPC) coding in terms of device utilization and power. The functional verification and the simulation are performed using Verilog HDL. Error correction techniques such as Linear block codes, RS codes, Convolutional codes are employed to implement forward error correction but as the constraint length increases the design of decoders becomes more complex. LDPC is a type of block code that is capable of correcting random errors. They are popular because of their eminent detection and correction capabilities. LDPC encoding technique provides high throughput and aims to improve BER when compared to conventional techniques. The decoding of LDPC codeword employs the Message Passing Algorithm, where each bit in a codeword is allocated to special nodes. The performance of these codes is hence better and easily attains Shannon’s limit than the previously used codes. Synthesis for the technique is performed and utilization reports are derived from the synthesis in Vivado.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132750420","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":"Near Real-Time Monitoring of Construction Progress: Integration of Extended Reality and Kinect V2","authors":"Ahmed Khairadeen Ali, Do-Yeop Lee, Chansik Park","doi":"10.22260/isarc2020/0005","DOIUrl":"https://doi.org/10.22260/isarc2020/0005","url":null,"abstract":"Construction progress monitoring and visualization have recently undergone advanced development. However, the data exchange process between construction offices and jobsites still lacks automation and real-time data records. Furthermore, an information gap between construction offices and jobsite activity persists, and progress inspectors still need to visit jobsites to check progress and assign quality ratings. Therefore, this research proposes a near real-time construction progress monitoring system called (iVR), which integrates 3D scanning, extended reality, and visual programming to visualize interactive onsite inspection and provide numeric data. The iVR system contains four modules: 1) recording jobsite activity through 3D scan (iVR-scan); 2) processing and converting 3D scan data into a 3D model (iVR-preparation); 3) immersive virtual reality inspection in the construction office (iVR-inspect); and 4) visualizing inspection feedback on the construction jobsite using augmented reality (iVR-feedback). In other words, 3D laser scanners first capture an activity point cloud and the iVR-preparation algorithm processes and converts the point cloud into a 3D model that is sent to the construction office's BIM cloud. Then, the proposed VR mode in iVR-inspect enables a quality assurance inspector to trace workflow, compare current project progress with blueprints, measure objects, and add text or design notes to 3D models to improve the site management and decision-making quality. Finally, iVR-feedback sends inspection reports to jobsite workers, who can visualize them in an augmented reality mode integrated with graphical algorithms. An experimental laboratory trial is presented in this paper to validate the concept; the iVR system for progress monitoring successfully generated the required results. The proposed system has the potential to help progress inspectors and workers complete quality and progress assessments and decision making through the development of a productive and practical communication platform. It compares favourably to conventional manual monitoring or data capturing, processing, and storing methods, which have storage, compatibility, and time-efficiency issues. Moreover, iVR minimizes physical interactions between workers and QA inspectors, thus creating healthier construction jobsites that are characterized by minimal human interaction. Finally, the same approach can be applied to more complex construction activities with movable natures.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127038282","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":"Aspects of Developing a Powder Application Module Based on Electrophotography for Additive Powder Bed Based Processes","authors":"J. Foerster, Marco Michatz, C. Anstaett, C. Seidel, J. Schilp","doi":"10.2139/ssrn.3724131","DOIUrl":"https://doi.org/10.2139/ssrn.3724131","url":null,"abstract":"The field of electrostatics and electrophotography offers great potential for applying powder layers for powder bed based additive manufacturing processes, such as laser-based powder bed fusion processes (LPBF). The opportunity of handling various powders independently of their material and particle properties marks the main benefit of electrostatic recoaters. The process operation is based on the electrophotographic principle known from laser printers. In this contribution the authors show a concept of an electrophotographic powder application module (EPAMO) for the powder layer deposition in LPBF of metallic powders. Within the scope of this work the focus is set on the general characterization leading into a technical concept and a prototype version in a test rig. The performed investigations of this paper concentrate on the charging step of the electrophotographical process with regard to the ambient condition of the LPBF process. Several aspects like charging parameters, temperature and inert gas atmosphere are considered.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128500002","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":"Lawn Mower – An Automated Machine","authors":"Neha Bhateja, Nishu Sethi, Shefali Jain, Yash Mishra","doi":"10.21276/IJIRCST.2020.8.6.7","DOIUrl":"https://doi.org/10.21276/IJIRCST.2020.8.6.7","url":null,"abstract":"Robotics is a branch of engineering that combines more than one area of research and is used to design machines that helps us to assist in our day- to-day life. There are various inventions existing that are created using robotics and lawn mower is one such inventions. Lawn Mower or lawn cutter is a mechanical device whose work is to cut grass in our lawns. The automated lawn mower is used to do the same task automatically with help of different sensors and electrical components. This review aims to evaluate the technology that has been not used still to make the system more advanced. This paper presents the currently based system and techniques and retouches the areas that need to be modified for better performance.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131619907","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 a Method for Assessing the Effective Information Transfer Rate Based on an Empirical Model of Statistical Relationship Between Basic Parameters of the Standard 802.11 Wireless Channel","authors":"D. Mykhalevskiy","doi":"10.15587/1729-4061.2020.213834","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.213834","url":null,"abstract":"A method of estimating the effective data rate in channels of the Standard 802.11 was proposed. It provides for the measurement of the main energy parameter using the software and hardware of the subscriber device. This method is based on the empirical models of statistical relationships between the main parameters of the channel which are obtained on the basis of experimental studies using monitoring algorithms. The solutions obtained during the implementation of this method make it possible to take into account the maximum possible number of destabilizing factors and significantly reduce the time of assessment of the effective data rate. It should be noted that this method can be used for technical diagnostics of wireless networks of Standards 802.11x at the stages of network design and operation. It was established that when using the coefficient of energy efficiency, a significant error in the displacement of the points of intersection of the linear and logarithmic mathematical model occurs. This can lead to a discrepancy between the mathematical estimates of the effective data rate and real values. The statistical relationship gives a smaller error; however, it increases requirements for empirical studies to obtain the maximum possible reliability. One of the features of the proposed method is the reliability of assessment of the effective data rate. This reliability depends on three main factors: accuracy of assessing the results based on which the mathematical model was obtained; estimation of fluctuation intervals and characteristics of the Standard 802.11 equipment of different manufacturers. The last factor can be considered as a disadvantage that involves the creation of a database of parameters of the model of statistical relationship for different devices with correction coefficients","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121951130","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":"Will Operators Work in Close Proximity to Industrial Robots? A Study of Acceptance Using Psychological and Physiological Responses","authors":"Iveta Eimontaite, Cyril Jaksic, S. Fletcher, Teegan Johnson, A. Oostveen","doi":"10.2139/ssrn.3718020","DOIUrl":"https://doi.org/10.2139/ssrn.3718020","url":null,"abstract":"Industry 4.0 and the introduction of human-robot collaboration offers manufacturing companies the potential for increased productivity and efficiency. However, robots can still be a concern for human operators. The present study aimed to investigate people’s acceptance of working alongside an industrial robot. Participants completed a drilling and measuring task in three experimental conditions: working close to the robot, working at a further distance from the robot and, as a control condition not measuring proximity effects, working without the robot operating. Physiological responses (skin conductance and heart rate) and eye gaze were recorded, along with self-report psychometric measures of trust, attitudes towards the robot, technology readiness, workload, situation awareness, and qualitative opinions relating to satisfaction. Results show little to no change in any of the self-reported psychometric measures between the experimental conditions, indicating that proximity had no effect on participants’ psychological states. However, in both of the experimental conditions examining proximity effects skin conductance levels were higher than in the control condition, indicating that arousal levels are increased by the robot simply being operational regardless of proximity. Results also suggest that participants evaluated their performance as better if they completed their task before the robot finished, which provides some insight into the potential dynamics of future human-robot partnerships and the need for collaborative tasks to be designed with care so that task cycle times suit requirements of both the robot and the operator.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117004117","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":"A New Approach to Detecting and Classifying Multiple Faults in IEEE 14-Bus System","authors":"Ibrahim Ismael Alnaib, O. S. Alyozbaky, A. Abbawi","doi":"10.15587/1729-4061.2020.208698","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.208698","url":null,"abstract":"Faults in the power system generally provide considerable changes in its quantities such as under or over-power, over-current, current or power direction, frequency, impedance, and power factor. Reading data related to both currents and voltages is usually involved for detecting and situating the fault on the transmission network. These days, any outage of power in a power grid leads to heavy financial losses for commercial, industrial, and domestic consumers. Random and irregular faults in transmission grids contribute significantly to events of power outages. A significant contribution of this study is a new technique for simulating a multiple simultaneous faults model. The recommended approach is an effective technique for detection, classification and localization of faults in transmission networks of electric power. To attain this objective, a training procedure and a neural network simulation were carried out using m-file in MATLAB. A virtual bus has been proposed to analyze the fault which happens on the transmission line and bus. This technique has been applied on the IEEE 14 bus and multiple simultaneous faults have been mentioned in this study. The fault situations are simulated in m-files through the two-port network performance method, which is a highly enhanced scheme in comparison to the existing methods. The results have been arrived upon by subjecting different buses to varying types of fault. The results provide comprehensive information regarding fault current, post-fault voltages, and fault MVA on all the buses. The values at the bus for voltage, power consumption, and phase angles were specified. As suggested by the findings of the simulation, the proposed methodology is an effective technique for detection, classification and localization of faults","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127184297","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":"Monetite (Dcpa), an Important Calcium Phosphate Compound - its Structure, Processing, and Applications","authors":"H. Zhou, L. Yang, U. Gbureck, S. Bhaduri, P. Sikder","doi":"10.2139/ssrn.3716039","DOIUrl":"https://doi.org/10.2139/ssrn.3716039","url":null,"abstract":"Monetite (Dibasic calcium phosphate anhydrate, DCPA, CaHPO 4 ) belongs to the sub-category of dibasic calcium phosphates in the diverse calcium phosphate system with its tremendous applications in orthopedics and other biomedical fields. Over the past fifteen years, the research on monetite has increasingly revealed its useful properties. Yet, in comparison to its vastly popular counterparts, hydroxyapatite (HA) and tricalcium phosphates (TCPs), monetite has not gained the attention it deserves. The motivation behind this paper is to provide a comprehensive review of the state-of-the-art of research and development on monetite. After a brief introduction, the paper follows the typical materials science correlations on “Structure-Property-Processing” and relating those aspects to research translation. Indeed, the last few years witnessed increasing numbers of studies on applications of monetite in the form of granules, 3-D printed scaffolds, cements, composites, and coatings with promising outcomes in both in vitro and in vivo studies. The paper concludes with a summary and potential future research directions and its translation. It is hoped that this timely review will present a comprehensive landscape of research on monetite and will enable and entice researchers and engineers across the globe into this important calcium phosphate.","PeriodicalId":404477,"journal":{"name":"Mechanical Engineering eJournal","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114821752","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}