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السجلات المعروضة 1380 -- 1399 من 49774
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A solid-phase extractant based on microemulsion modified date pits for toxic pollutants
( Elsevier , 2013 , Article)Application of microemulsion modified raw date pits as an inexpensive solid extractant for removing methylene blue (MB), copper ion (Cu2+) and cadmium ion (Cd2+) has been presented. The results summarised herein are also ... -
A sorting based efficient heuristic for pooled repair shop designs
( Elsevier , 2020 , Article)In this paper, we address the assignment problem of skills to servers (e.g., repairmen) in a multi-server repair shop of a spare parts supply system. This type of assignment problems tends to be hard in general, due to the ... -
A space vector PWM scheme for five-phase current-source converters
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)The most recent literature on multiphase machine drives is based on voltage-source converter (VSC) systems utilizing different modulation techniques. Very little attention is given to the multiphase current-source converters ... -
A sparsity-aware approach for NBI estimation and mitigation in large cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)Underlay cognitive networks should follow strict interference thresholds to operate in parallel with primary networks. This constraint limits their transmission power and eventually the coverage area. Therefore, in this ... -
A sparsity-aware cooperative protocol for cognitive radio networks with energy-harvesting primary user
( IEEE , 2015 , Conference Paper)We consider a cognitive setting composed of multiple primary frequency bands each of which consists of a limited-battery energy-harvesting primary user and a secondary user. The primary user is equipped with a limited-capacity ... -
A stable porous vessel for photocatalytic degradation of Azocarmine G dye
( Elsevier , 2022 , Article)Porous nanocomposite of polystyrene (PS) is fabricated by non-solvent induced phase separation, and with the addition of ZnO nanomaterials through electrospinning, the different evaporation rates of solvent/non solvent ... -
A state of the art review of control techniques for power electronics converter based distributed generation systems in different modes of operation
( IEEE Computer SocietyIEEE , 2013 , Conference Paper)This paper presents an overview of the state of the art techniques in inverter-based distribution generation systems. Different control techniques and classification of inverter modules operated in grid and islanded modes ... -
A state of the art review on condition assessment models developed for sewer pipelines
( Elsevier , 2020 , Article)In order to achieve an efficient and a successful operation and maintenance plan for assets, management personnel should have detailed information on the condition of the assets to make informed strategic decisions and ... -
A state-of-the-art review on producing engineered biochar from shellfish waste and its application in aquaculture wastewater treatment
( Elsevier Ltd , 2022 , Article)Global production of shellfish aquaculture is steadily increasing owing to the growing market demands for shellfish. The intensification of shellfish aquaculture to maximize production rate has led to increased generation ... -
A state-of-the-art review on spent coffee ground (SCG) pyrolysis for future biorefinery
( Elsevier Ltd , 2022 , Article)Coffee is a globally consumed beverage that produces a substantial amount of valuable organic waste known as spent coffee grounds (SCG). Although SCG is a non-edible biomass, research initiatives focused on valorizing/utilizing ... -
A state-of-the-art review on topologies and control techniques of solid-state transformers for electric vehicle extreme fast charging
( John Wiley and Sons Inc , 2021 , Article Review)Electrical vehicle (EV) technology has gained popularity due to its higher efficiency, less maintenance, and lower dependence on fossil fuels. However, a longer charging time is a significant barrier to its complete ... -
A state-of-the-art review on wind power converter fault diagnosis
( Elsevier Ltd , 2022 , Article Review)The rapid expansion of installed wind energy capacity and the continuous development of wind turbine technology has drawn attention to operation and maintenance issues. In order to keep wind power a competitive energy ... -
A Static and Free Vibration Analysis of Porous Functionally Graded Beams
( Qatar University Press , 2023 , Conference Paper)In this work, the static and free vibration analysis of functionally graded (FG) porous beams is investigated using a new higher-order shear deformation model (HSD). The porosity that develops naturally during the fabrication ... -
A static three-phase to five-phase transformer based on Scott connection
( Elsevier B.V. , 2014 , Article)Multiphase machines have become challenging candidates for safety-critical applications that require wide fault tolerant capabilities and higher system reliability. However, this adds more complexity to the adopted power ... -
A stationary frame current control for inverter-based distributed generation with sensorless active damped LCL filter using Kalman filter
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)Due to the large variety of renewable power sources, power electronics play an important role in energy conversion. Different power converter topologies are used to interface distributed power generation systems (DPGS) ... -
A STEM Model to engage students in Environmental Sustainability Program Through Collaborative Problem-solving Approach- Case Study in Qatar
( Qatar University Press , 2021 , Poster)Following the launch of Qatar's National Vision 2030, environmental development was highlighted as one of the Vision's four pillars, emphasizing the importance of developing people's awareness of their duty in maintaining ... -
A STEM Model to Engage Students in Sustainable Science Education through Sports: A Case Study in Qatar
( Qatar University Press , 2021 , Poster)Sports is a powerful tool to make deeper connections, stimulations, and understanding of STEM (science, technology, engineering, and mathematics) education. Science in sports is a unique program established to present ... -
A Stochastic Geometric Analysis of Device-to-Device Communications Operating over Generalized Fading Channels
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)Device-to-device (D2D) communications are now considered an integral part of future 5G networks, which will enable direct communication between user equipments and achieve higher throughputs than conventional cellular ... -
A Strategic Design Approach for Implementing Rainwater Management System Using an Integration of GIS and BIM Tool
( Qatar University Press , 2023 , Conference Paper)An increase in urbanization and uncontrolled development has resulted in a water stress situation, which necessitates the exploration of alternate water sources. Rainwater has proven to be a prominent alternate water source ... -
A Strategy for Emergency Vehicle Preemption and Route Selection
( Springer Verlag , 2019 , Article)Emergency vehicle preemption (EVP) aims to give right of way to emergency vehicles (EV) heading toward the incident location through a network of signalized intersections by creating a green wave en-route. The design goals ...
