Author
Mohammed Al-Nehari
Bio: Mohammed Al-Nehari is an academic researcher from Taiyuan University of Technology. The author has contributed to research in topics: Tip-speed ratio & Grinding. The author has an hindex of 2, co-authored 7 publications receiving 42 citations.
Topics: Tip-speed ratio, Grinding, Abrasive, Composite number, Wind direction
Papers
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TL;DR: In this article, the best configuration between guide vanes and cross-flow vertical axis wind turbine was investigated to determine the turbine with the highest power coefficient, which increased around 59% of the turbine's performance using GV.
Abstract: A cross-flow wind turbine has a high torque coefficient at a low tip speed ratio; therefore, it is a good candidate for a self-starting turbine. This study aims to investigate the best configuration between guide vanes and cross-flow vertical axis wind turbine. The experiment test was carried out to determine the turbine with the highest power coefficient. The cross-flow turbine has 14, 18, and 22 blades with using 6,10 and 14 blades of guide vane (GV) was developed in this study, employing 15°, 25°, 35°, 45°, 55°, 65°, and 75° of tilt angles in fifth different wind speed conditions 4 m/s, 6 m/s, 7.5 m/s, 9.20 m/s, and 11 m/s. The turbine has 22 blades with 14 GV blades at 55° of tilt angle blades producing more remarkable turbine performance improvement than other blades. The highest power coefficient (CP) of cross-flow using 14 GV blades at 55° was 0.0162 at 0.289 TSR, which increased around 59% of the turbine's performance using GV.
78 citations
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TL;DR: In this paper, the influence of the guide vanes on the Savonius rotor performance was investigated under different tilt angles, i.e., 0°, 20°, 40°, and 60°.
19 citations
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TL;DR: In this paper , a vibration-based virtual NOx sensor is developed based on these critical relationships for real-time NOx monitoring, which is proven to meet the accuracy requirement of vehicle emission monitoring for both steady-state and transient conditions and has a better frequency response compared to the emission measurement system.
Abstract: With a strong legal basis and regulatory authority, cost-effective transient emission sensors that reflect real-driving emissions are key factors for accomplishing environmental requirements. It is difficult for the existing NOx emission monitoring techniques to achieve a balance between accuracy and timeliness. Fundamentally, in-cylinder combustion is the thermodynamic cause of NOx emissions and the main excitation source for engine vibration and noise emissions. A novel vibration-based virtual NOx sensor is developed based on these critical relationships for real-time NOx monitoring. First, the correlation between vibration and NOx emission was characterized in-depth. Then, a technique of constructing two-dimensional filters for vibration signals is proposed to extract combustion-related information. A principal component regression (PCR) model for NOx prediction was established based on the reconstructed in-cylinder pressure. Finally, the virtual NOx sensor is tested and validated on a single-cylinder diesel engine bench. The virtual NOx sensor is proven to meet the accuracy requirement of vehicle emission monitoring for both steady-state and transient conditions and has a better frequency response compared to the emission measurement system.
8 citations
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TL;DR: In this paper, the authors investigated the addition of elemental Zr to improve the connection effect of alloys and showed that Zr-free brazing alloys inhibited the overproduction of the hard-brittle phase of Cu3Ti and formed other intermetallic compounds such as AgZr2 and Cu10Zr7, which were beneficial to the metallurgical joint.
4 citations
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TL;DR: In this paper, the wear behavior of a single-layer electroplated cubic boron nitride (cBN) grinding wheel was investigated in a creep feed grinding Inconel 718 narrow-deep-groove with a width of 2 mm.
Abstract: The wear behavior of a single-layer electroplated cubic boron nitride (cBN) grinding wheel was investigated in creep feed grinding Inconel 718 narrow-deep-groove with a width of 2 mm. In this paper, the protrusion height of cBN grits on the side edge of the grinding wheel was measured by three-dimensional optical profiler, and a scanning electron microscope was used to detect the topography of worn cBN grit and the nickel bonding layer. The investigation results indicated that the steady wear stage of the grinding wheel shared more than 84.6% of the wheel life span, and the machining precision of the grinding wheel was kept at a high level. The fracture mode of the cBN grit was proven to be cleavage. The sources of the cleavage cracks were observed on the surface of wear flat or the side surface of the cBN grit. The holding strength of cBN grit could be weakened due to the joint surface breakage, the displacement of grit, or the cracks of the nickel bonding layer. The transition layer was contributed to the decrease of the bonding strength. Severe macro fractures and the concentration of pulled out grits were observed on the transition edge and the inner area of the side edge, separately. This study provides a deep understanding of the wear mechanism of a single-layer electroplated cBN grinding wheel.
3 citations
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TL;DR: In this paper , the authors present a systematic study of modern blockchain-based solutions for securing medical data with or without cloud computing, and implement and evaluate the different methods using blockchain in this paper.
Abstract: Since the last decade, cloud-based electronic health records (EHRs) have gained significant attention to enable remote patient monitoring. The recent development of Healthcare 4.0 using the Internet of Things (IoT) components and cloud computing to access medical operations remotely has gained the researcher's attention from a smart city perspective. Healthcare 4.0 mainly consisted of periodic medical data sensing, aggregation, data transmission, data sharing, and data storage. The sensitive and personal data of patients lead to several challenges while protecting it from hackers. Therefore storing, accessing, and sharing the patient medical information on the cloud needs security attention that data should not be compromised by the authorized user's components of E-healthcare systems. To achieve secure medical data storage, sharing, and accessing in cloud service provider, several cryptography algorithms are designed so far. However, such conventional solutions failed to achieve the trade-off between the requirements of EHR security solutions such as computational efficiency, service side verification, user side verifications, without the trusted third party, and strong security. Blockchain-based security solutions gained significant attention in the recent past due to the ability to provide strong security for data storage and sharing with the minimum computation efforts. The blockchain made focused on bitcoin technology among the researchers. Utilizing the blockchain which secure healthcare records management has been of recent interest. This paper presents the systematic study of modern blockchain-based solutions for securing medical data with or without cloud computing. We implement and evaluate the different methods using blockchain in this paper. According to the research studies, the research gaps, challenges, and future roadmap are the outcomes of this paper that boost emerging Healthcare 4.0 technology.
86 citations
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01 Nov 1985
TL;DR: Instrumentation, Measurement and Analysis, Instrumentation, measurement and analysis as mentioned in this paper, instrumentation, measurements and analysis, instrumentation and measurement, measurement, analysis and analysis.
Abstract: Instrumentation, Measurement and Analysis , Instrumentation, Measurement and Analysis , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
80 citations
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TL;DR: In this paper, rational augmented CNN state-of-the-art technology was utilized for deepfake facial reconstruction via hardware such as webcams and security cameras in real time.
Abstract: Deepfake network is a prominent topic of research as an application to various systems about security measures. Although there have been many recent advancements in facial reconstruction, the greatest challenge to overcome has been the means of finding an efficient and quick way to compute facial similarities or matches. This work is created utilizing the rationale-augmented convolutional neural network (CNN) on MATLAB R2019a platform using the Kaggle DeepFake Video dataset with an accuracy of 95.77%. Hence, real-time deepfake facial reconstruction for security purposes is difficult to complete concerning limited hardware and efficiency. This research paper looks into rational augmented CNN state-of-the-art technology utilized for deepfake facial reconstruction via hardware such as webcams and security cameras in real time. Additionally, discuss a history of face reconstruction and provide an overview of how it is accomplished.
72 citations
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TL;DR: In this paper , the authors explore the current research problems using the 5G technology, and propose the novel architecture for smart healthcare systems using 5G and Industry 4.0 standards using the Network Simulator (NS2) to investigate the current 5G methods.
Abstract: The emergence of the Industry 4.0 revolution to upgrade the Internet of Things (IoT) standards provides the prominence outcomes for the future wireless communication systems called 5G. The development of 5G green communication systems suffers from the various challenges to fulfill the requirement of higher user capacity, network speed, minimum cost, and reduced resource consumption. The use of 5G standards for Industry 4.0 applications will increase data rate performance and connected device's reliability. Since the arrival of novel Covid-19 disease, there is a higher demand for smart healthcare systems worldwide. However, designing the 5G communication systems has the research challenges like optimum resource utilization, mobility management, cost-efficiency, interference management, spectral efficiency, etc. The rapid development of Artificial Intelligence (AI) across the different formats brings performance enhancement compared to conventional techniques. Therefore, introducing the AI into 5G standards will optimize the performances further considering the various end-user applications. We first present the survey of the terms like 5G standard, Industry 4.0, and some recent works for future wireless communications. The purpose is to explore the current research problems using the 5G technology. We further propose the novel architecture for smart healthcare systems using the 5G and Industry 4.0 standards. We design and implement that proposed model using the Network Simulator (NS2) to investigate the current 5G methods. The simulation results show that current 5G methods for resource management and interference management suffer from the challenges like performance trade-offs.
58 citations
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01 Dec 2021TL;DR: This paper aimed to highlight the energy challenges that faced the Libyan state, and the possibility to diagnose and suggest a strategy to develop and finding solutions, and investigates an opportunity to exploit solar photovoltaics to meet the deficiency in energy demand and by the affordable way.
Abstract: The solar photovoltaic (PV) is one way of utilising incident solar radiation to produce electricity without carbon dioxide (CO2) emission. It's important here to give a general overview of the present situation of Libyan energy generation. This paper aimed to highlight the energy challenges that faced the Libyan state, and the possibility to diagnose and suggest a strategy to develop and finding solutions. The residential building loads represent the largest energy consumption in the country, which presents approximately 36%. A wide range of critical literature review takes place to understand the energy system situations. This study addresses the current situation of solar photovoltaic power in Libya, the use of solar energy, and proposes strategies adopted by Libya to encourage future applications of solar photovoltaic energy and electricity generation. Furthermore, this study investigates an opportunity to exploit solar photovoltaics to meet the deficiency in energy demand and by the affordable way. Lastly, we presented solar photovoltaics application in Libya; thus, it has tremendous opportunities and possibilities. Besides, available potential, reality challenges and drawn up future perspectives.
27 citations