
显示样式: 排序: IF: - GO 导出
-
Preparedness for Mass Gatherings: A Simulation-Based Framework for Flow Control and Management Using Crowd Monitoring Data Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-20 Hassan M. Al-Ahmadi, Imran Reza, Arshad Jamal, Wael S. Alhalabi, Khaled J. Assi
Proactive management at mass gatherings is vital to ensure safe crowd evacuation during emergencies. The increasing number of crowd incidents and casualties during the Hajj season is one of the major concerns for authorities in Saudi Arabia. This study aims to explore and analyze crowd dynamics visiting the Prophet's (PBUH) tomb at the visiting (Ziara) corridor in the Holy Mosque of Madinah under continuous
-
Exome Sequencing Analysis of Familial Cases of Multiple Sclerosis and a Monozygotic Discordant Twin Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-20 Asem M. Alkhateeb, Diala S. Salman, Kifah A. Al-Hayk
Multiple sclerosis (MS) is a chronic inflammatory autoimmune disease, which leads to neurodegenerative processes that cause neuron demyelination. MS is multifactorial with uncertain etiology, where interactions between genetic makeup of an individual and environmental factors influence disease risk. More than 200 risk variants have been implicated in MS, each contributed to understanding the etiology
-
Pore Pressure Prediction and Its Relationship with Rock Strength Parameters and Weight on Bit in Carbonate Reservoirs (A Case Study, South Pars Gas Field) Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-20 Reza Khoshnevis-zadeh, Alireza Hajian, Ehsan Larki
Accurate pore pressure knowledge is particularly critical in drilling, such as drilling safety (avoidance of blowouts and well control lost-time incidents). Pore pressure prediction in carbonate reservoir due to the fact that the pore system and fractures are more complex than the clastic reservoir, also the effectiveness of pore pressure on drilling parameters like weight on bit that has direct effects
-
Adsorption of Uranium (VI) onto Natural Algerian Phosphate: Study of Influencing Factors, and Mechanism Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-20 Safir Ouassel, Salah Chegrouche, Djamel Nibou, Abderahmane Aknoun, Redouane Melikchi, Sihem Khemaissia, Sabino De Gisi
The goal of this study was to use natural phosphate (NP) abundant in Algeria, as an adsorbent for the removal of uranium (VI) from aqueous solutions in batch adsorption. A full 23 factorial extended experimental design was investigated. The factors and levels used during the experiments were; pH (X1) (1–5), initial U(VI) concentration (X2) (30–60 mg L−1) and adsorbent dose (X3) (5–30 g L−1). The properties
-
Experimental Investigations of the Turbulent Boundary Layer for Biomimetic Surface with Spine-Covered Protrusion Inspired by Pufferfish Skin Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-20 Honggen Zhou, Yesheng Zhu, Guizhong Tian, Xiaoming Feng, Yaosheng Zhang
Pufferfish skin is known for its spine-covered surface, which differs significantly from that of common fish species. Recent research has shown that such rough surfaces may have potential applicability in saving energy. In order to verify the drag reduction effects of pufferfish skin, a flat sample and six samples featuring biomimetic spine-covered protrusions (BSCPs) with combinations of three different
-
A Coscheduling Model of Automated Single-Beam Cranes and AGVs in Assembly Workshop Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 Qian Yang, Zailiang Chen, Hongbing Yang
The simultaneous scheduling of cranes and automated guided vehicles (AGVs) has been a critical problem, especially in traditional heavy-duty manufacturing enterprises. Previous studies mainly focus on the coscheduling problem for the container terminals rather than workshop. Hence, this study evaluated the coscheduling problem of automated single-beam cranes and AGVs incurred by an actual manufacturing
-
Boundary-Based Anchor Selection Method for WSNs Node Localization Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 Ke Zhang, Guang Zhang, Xiuwu Yu, Shaohua Hu
Node localization is considered a crucial technology that affects the effectiveness and practicality of the wireless sensor networks (WSNs). In the application scenarios, the deployment area is usually non-uniformly and may have some holes due to the complex application environment, and the existence of holes in the deployment area will affect the accuracy of distance estimation and lead to a large
-
Research on Weight-on-bit Self-adjusting Dual-diameter PDC Bit Design and Effect Evaluation Utilizing Stress-Releasing Effect of Rock at Bottomhole Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 Huaigang Hu, Zhichuan Guan, Bin Wang, Baoping Lu, Weiqing Chen, Yuqiang Xu, Yongwang Liu
Rock-breaking efficiency is not so satisfied using the conventional PDC bit, especially in the hard, soft–hard interbedded, and strong abrasive formations in ultra-deep wells. A method is proposed to make full use of stress-releasing effect at bottomhole, thereby improving the rock-breaking efficiency, and a supporting weight-on-bit (WOB) self-adjusting dual-diameter PDC bit (WSDB) has been invented
-
Hierarchical Control of DC Motor Coupled with Cuk Converter Combining Differential Flatness and Sliding Mode Control Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 M. H. Arshad, M. A. Abido
This paper proposes a hierarchical control law for DC motor fed by DC–DC power Cuk Converter. The control is divided into two parts: Firstly, the property of differential flatness associated with the mathematical model of the DC motor is studied to design a robust control that achieves the task of tracking the reference angular speed trajectory for the motor. It also gives the voltage profile \(\vartheta
-
Influence of the 2-phase Flow Models on Prediction of Absorber Tube Performance Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 K. A. Khalid, A. Al-Sarkhi, H. M. Bahaidarah
It is crucial to identify flow regimes/patterns in order to calculate the pressure drop and heat transfer coefficient (HTC) with high accuracy in flow boiling. Researchers have not paid too much attention to the two-phase (2-phase) phenomena and the influence of the 2-phase flow parameters on the performance of absorber tubes. This parametric study sheds the light on some of the well-known and widely
-
Investigation of Optimum Conditions for Flow Control Around Two Inline Square Cylinders Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-19 Waqas Sarwar Abbasi, Anam Naheed, Shams Ul Islam, Hamid Rahman
Numerical investigations are carried out for the flow around two inline square cylinders with a flat plate, placed in the wake, using the lattice Boltzmann method. Main emphasis of this work is to find the optimum values of the gap ratio (L/d) between cylinders and plate for maximum vortex shedding control and suppression of flow induced forces. The gap ratio between both cylinders as well as between
-
Methylcyclohexene and Methylcyclohexadiene Dehydrogenation–Hydrogenation over Pt/Al 2 O 3 Catalyst Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-18 Muhammad R. Usman, David L. Cresswell, Arthur A. Garforth
The dehydrogenation of 1-methylcyclohexene (MCHe) and 1-methyl-1,4-cyclohexadiene (MCHde) was studied over an in-house 1.0 wt% Pt/γ-Al2O3 catalyst. For the comparison purpose, the dehydrogenation of methylcyclohexane (MCH) was also studied. The experiments were performed in a fixed bed reactor and within a temperature range of 220 °C to 380 °C. The reactor pressure was maintained at 1.013 and 5 bar
-
Synthesis and Process Parameter Optimization of Biodiesel from Jojoba Oil Using Response Surface Methodology Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-16 Aymn Abdulrahman, Abulhassan Ali, Adamu Alfazazi
Jojoba seed is an attractive alternative energy source in Saudi Arabia due to its high adaptability to harsh weather, saline water, desert, and hot temperature. In the present study, cold-pressed jojoba oil is used for the synthesis of biodiesel. In addition to that, this research work carried out a detailed optimization study of process parameters using response surface methodology. An empirical model
-
Harvesting of Microalgae from Synthetic Fertilizer Wastewater by Magnetic Particles Through Embedding–Flocculation Strategy Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-16 Gaik Eng Loo, Lee Muei Chng, Swee Pin Yeap, JitKang Lim, Derek Juinn Chieh Chan, Sim Siong Leong, Pey Yi Toh
Microalgae bio-treatment of synthetic fertilizer wastewater is particularly attractive due to their photosynthetic capabilities. Microalgae tend to convert solar energy into useful biomass, incorporating with the nutrients that present in wastewater, such as nitrogen and phosphorus. However, harvesting of microalgae remains a challenge because of the small size (3–30 μm) of microalgae cells and the
-
Cyclic Performance of RC Shear Wall Embedded with X-Shaped Web Reinforcement Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Vijay Thiruchengode Jothimani, Srisanthi Vellalapalayam Guruswamy
Over the past few decades, the study on shear walls with various configurations of reinforcement detailing has shown significant growth due to its efficient performance under earthquake forces. The current work experimentally explores the seismic performance of reinforced concrete (RC) shear wall detailed with X-shaped web reinforcement configuration. Four numbers of 1:4 scaled models of RC shear wall
-
Fractional LMS and NLMS Algorithms for Line Echo Cancellation Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Akhtar Ali Khan, Syed Muslim Shah, Muhammad Asif Zahoor Raja, Naveed Ishtiaq Chaudhary, Yigang He, J. A. Tenreiro Machado
In long haul communication environments, speech data transmission is severely affected by echoes. This phenomenon results in high bit errors as well as in degraded and annoying performance. Traditionally these problems, including hybrid and acoustic echoes, have been controlled through the use of echo suppressors. These suppressors were subsequently replaced by line echo cancellers using adaptive Finite
-
Predicting Bond Strength of FRP Bars in Concrete Using Soft Computing Techniques Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Mohindra Singh Thakur, Siraj Muhammed Pandhiani, Veena Kashyap, Ankita Upadhya, Parveen Sihag
Fiber-reinforced plastic (FRP) rebars can be the futuristic potential reinforcing material in place of mild steel (MS) rebars which are highly prone to corrosion. However, the bond properties of the FRP rebars are not consistent with those of mild steel rebars. Therefore, determination of bond strength properties of FRP rebars becomes essential. In this study, an investigation was conducted on 222
-
Optimization of the Asymmetric Cellulose Acetate Membrane Synthesis Variables for Porosity and Pure Water Permeation Flux Using Response Surface Methodology: Microfiltration Application Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Zainab Mohammed Redha, Qais Bu-Ali, Yousif Ahmed Saeed, Ali Mohammed Ali
Membranes play a vital role in membrane-based water treatment processes. Thus, improvement in the membrane fabrication stage can greatly affect the overall performance of these technologies. Accordingly, this study focuses on optimizing the fabrication process of a microfiltration cellulose acetate membrane prepared using a pore-templating method. The effects of synthesis variables and their interactions
-
Control of Lithofacies and Geomechanical Characteristics on Natural Fracture Systems in Qusaiba Shale, Rub’ Al-Khali Basin, Saudi Arabia Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Ayyaz Mustafa, Mohamed Omar Abouelresh, Abdulazeez Abdulraheem
The lower Silurian Qusaiba Shale is one of the major source rocks for Paleozoic oil/gas reservoirs in Saudi Arabia and recently considered a potential unconventional shale gas resource. The study aims to evaluate the reservoir heterogeneity and production potential of Qusaiba Shale through the integration of geological, geomechanical and fractures characteristics. Three lithofacies were identified
-
Hybrid MHHO-DE Algorithm for Economic Emission Dispatch with Valve-Point Effect Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Aiming Xia, Xuedong Wu, Yingjie Bai
Economic emission dispatch with valve-point effect in power systems is a complex multimodal, nonconvex and constrained multi-objective optimization problem. To solve this problem, a hybrid multi-objective algorithm with effective constraint handling method based on Harris hawks optimization and differential evolution is proposed: (1) the concept of Pareto domination is integrated into Harris hawks
-
N -Stearoyl Chitosan as a Coating Material for Liposomes Encapsulating Itraconazole Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-15 Vicit Rizal Eh Suk, Anita Marlina, Zahir Hussain, Misni Misran
Since the discovery of liposomes, this technology has been evolving from the studying of biological membranes to various multidisciplinary studies, especially cosmeceuticals and pharmaceuticals. However, the conventional liposomes encountered many challenges such as metabolite by the process of phagocytosis, instability in plasma, and short half-life. In this study, we synthesized 41 kDa N-stearoyl
-
A Prediction Model for Deformation Behavior of Concrete Face Rockfill Dams Based on the Threshold Regression Method Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-12 Yanlong Li, Haiyang Zhang, Lifeng Wen, Ning Shi
Rapid prediction of deformation behaviors of concrete face rockfill dams (CFRDs) is of great significance in guiding their design and construction. The purpose of this study is to develop robust empirical prediction models with physical significance, which can rapidly predict typical deformation behaviors of CFRDs. Based on 87 case histories of in-service CFRDs, the threshold regression theory is used
-
Robust Optimization for Precision Product using Taguchi-RSM and Desirability Function Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-12 Jiawei Wu, Zhenliang Jiang, Liangqi Wan, Huaming Song, Kashif Abbass
The Taguchi method (TM) and TM-combined methods [e.g., TM fuzzy method (TM-Fuzzy), TM data envelopment analysis (TM-DEA), TM coupled with grey relational analysis (TM-GRA), etc.] have been proven to be effective to achieve robust design performance. However, the efficient strategy to identify the significant design parameters, and the link between different quality characteristics and design parameters
-
Toward Design of an Intelligent Cyber Attack Detection System using Hybrid Feature Reduced Approach for IoT Networks Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-11 Prabhat Kumar, Govind P. Gupta, Rakesh Tripathi
With simple connectivity and fast-growing demand of smart devices and networks, IoT has become more prone to cyber attacks. In order to detect and prevent cyber attacks in IoT networks, intrusion detection system (IDS) plays a crucial role. However, most of the existing IDS have dimensionality curse that reduces overall IoT systems efficiency. Hence, it is important to remove repetitive and irrelevant
-
Multi-Path Hybrid Spectrum Sensing in Cognitive Radio Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-11 Alaa Rabie Mohamed, Ahmad A. Aziz El-Banna, Hala A. Mansour
Inefficient utilization of the authorized spectrum emerges cognitive radio (CR) as a hopeful technology for both present and future telecommunications. It is owing to the potency to leverage the obtainable bandwidth of other wireless communication networks and thereby increase its occupancy. The key feature for the cognitive radio system for distinguishing the blank spectrum is spectrum sensing. This
-
Impacts of a New Highway on Urban Development and Land Accessibility in Developing Countries: Case of Beirut Southern Entrance in Lebanon Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-11 Walid Al-Shaar, Nabil Nehme, Olivier Bonin, Jocelyne Adjizian Gérard
This paper studies the impacts of the construction of a new highway on the built-up land use dynamics in the southern neighboring area of Beirut in Lebanon, whereas the impact of transport infrastructure on land use dynamics has been widely studied, few examples are found for developing countries where data are not widely available. Moreover, it is difficult to assess the impact of the infrastructure
-
Mechanical and Elastic Characterization of Shale Gas Play in Upper Indus Basin, Pakistan Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-11 Perveiz Khalid, Muhammad Irfan Ehsan, Mohamed Metwaly, Shahzada Khurram
The organic-rich shale intervals of Patala Formation of Paleocene age may be considered as potential shale gas play in the Upper Indus Basin of Pakistan. Until now, seismic and elastic properties of the Patala shales are not investigated in detail necessary to declare it as shale gas play and to differentiate shale gas pay zone from the non-pay zone. Data of eight wells in which Patala shales were
-
Artificial Intelligence-Based Protocol for Macroscopic Traffic Simulation Model Development Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-09 Imran Reza, Nedal T. Ratrout, Syed M. Rahman
This study proposes a machine learning-based protocol for developing a TRANSYT-7F model for an urban arterial network. The developed artificial neural network (ANN) method models the queue lengths of TRANSYT-7F using saturation flow, start-up lost time, and platoon dispersion as inputs. The queue lengths of the selected approaches of the study network can be obtained using the ANN model without running
-
Optimal Layout Design for Thrust Systems in Earth Pressure Balance Shield Machines Under Sudden Loads Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-09 K. S. Deng, Y. Y. Li, X. M. Zhang, R. C. Hu
This study explores an optimised thrust system layout for addressing sudden loads. Firstly, an adaptive mechanical model of a propulsion system under sudden external loads is established. Secondly, the relative variation coefficient (CRV), an evaluation index of thrust suitable for sudden loads, is proposed. Finally, on the basis of this adaptive mechanical model, the layout parameters of a uniform
-
Requirement Engineering Challenges: A Systematic Mapping Study on the Academic and the Industrial Perspective Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-09 Muhammad Tukur, Sani Umar, Jameleddine Hassine
Requirement engineering (RE) is the process of discovering stakeholders’ requirements and needs and documenting them in such a way that they can serve as the basis for all other system development activities. Despite recent advances in RE practices and tools, requirements engineers are still experiencing fundamental problems. Therefore, the identification and characterization of such challenges would
-
Insight into the Dynamics of Oldroyd-B Fluid Over an Upper Horizontal Surface of a Paraboloid of Revolution Subject to Chemical Reaction Dependent on the First-Order Activation Energy Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-09 Z. Ali, A. Zeeshan, M. M. Bhatti, Aatef Hobiny, T. Saeed
In this study, the problem of two-dimensional non-Newtonian Oldroyd-B fluid flow over the upper horizontal paraboloid surface (UHPS) is investigated. The shape of a submarine, the bonnet of a car, the shape of the jet plane, and the shape of the upper pointed bullet are some daily life examples of the paraboloid surface. At a free stream, the Oldroyd-B fluid flow over UHPS is created by the reaction
-
Shrinkage Limit Studies from Moisture Content: Electrical Resistivity Relationships of Soils Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-08 Nimi Ann Vincent, R. Shivashankar, K. N. Lokesh, Divya Nath
At the shrinkage limit, the soil is just fully saturated. Shrinkage limit of soils can be perceived as a point of inflection in either direction. While decreasing the water content, from its liquid state to the solid state, a point of inflection is reached (shrinkage limit) when further reduction in water content will not cause a reduction in the volume of the soil mass. While increasing the water
-
Right Ventricle Segmentation of Magnetic Resonance Image Using the Modified Convolutional Neural Network Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-08 Nagaraj V. Dharwadkar, Amruta K. Savvashe
In this paper, the segmentation model is developed using the convolutional neural network for automatic segmentation of a right ventricle MRI image. The proposed model is trained end-to-end using an RVSC dataset that contains the right ventricle magnetic resonance images. The proposed model gives state-of-art achievement for dice metric and also for the Jaccard index. The proposed model achieves an
-
Distance Estimation-Based PSO Between Patient with Alzheimer’s Disease and Beacon Node in Wireless Sensor Networks Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-08 Zainab Munadhil, Sadik Kamel Gharghan, Ammar Hussein Mutlag
In recent years, research in wireless sensor networks and their application in health care and environmental monitoring have attracted significant interest. In such applications, the accuracy of the distance estimation between a patient and a beacon node is crucial for determining patient location. In this study, the distance between the mobile node (carried by the Alzheimer’s patient) and the beacon
-
Integrated Wide-Area Backup Protection Algorithm During Stressed Power System Condition in Presence of Wind Farm Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-08 Sandeep Biswal, Sushree Diptimayee Swain, Ram Dayal Patidar, Akash Kumar Bhoi, Om Parkash Malik
Stressed power system conditions such as power swing, voltage instability and load encroachment may influence the secure operation of conventional backup protection at their third zone (zone 3). In this paper, a new integrated backup protection algorithm for distance relay is proposed based on wide-area measurements to distinguish the fault-stress conditions in the presence of offshore wind farm (WF)
-
Accuracy Assessment of DEMs Derived from Multiple SAR Data Using the InSAR Technique Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-08 Hakan Karabörk, Hasan Bilgehan Makineci, Osman Orhan, Pınar Karakus
In this study, digital elevation models (DEMs) derived from AlosPalsar data (Japanese Space Agency—JAXA), Sentinel-1A data, and Envisat ASAR data (European Space Agency—ESA) were compared by using a global navigation satellite system (GNSS). In addition, AW3D30, SRTM, and ASTER GDEM (open-access DEMs) data were also included in the accuracy evaluation. The DEM accuracies were investigated in three
-
Modeling of Congo Red Adsorption onto Multi-walled Carbon Nanotubes Using Response Surface Methodology: Kinetic, Isotherm and Thermodynamic Studies Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Veyis Selen, Ömer Güler
In this present study, an adsorption process was investigated to removal of Congo Red (CR) dye from aqueous solutions by using multi-walled carbon nanotubes (MWCNTs) as an adsorbent. The physico-chemical properties of MWCNTs were characterized by TEM, SEM, Raman spectroscopy and BET surface area. The response surface methodology, which is including central composite design, was used to investigate
-
CookingQA: Answering Questions and Recommending Recipes Based on Ingredients Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Abdullah Faiz Ur Rahman Khilji, Riyanka Manna, Sahinur Rahman Laskar, Partha Pakray, Dipankar Das, Sivaji Bandyopadhyay, Alexander Gelbukh
In today’s world where an individual is becoming more and more busy and independent, the use of recommendation-based systems is steadily increasing. Thus, making available professional knowledge to the common man in a short-span quite necessary. The aim of our recipe recommendation system is to recommend recipes to users based on their questions. To make the recommendation model important as well as
-
Flow Dynamics of PTT and FENE-P Viscoelastic Fluids in Circular and Flat Ducts: An Analytical Study Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Salah Latreche, Mohamed R. Sari, Mohamed Kezzar, Mohamed R. Eid
The main aim of this research work is to establish, under fully developed conditions, an analytical solution for viscoelastic fluids flow obeying the constitutive Phan–Thien–Tanner (PTT) and Finely Extensible Nonlinear Elastic-Peterlin (FENE-P) models. In fact, a unified formulation for laminar, stationary and fully developed flow in the cases of circular and flat ducts geometries is obtained for velocity
-
Multipoint Acceleration Information Acquisition of the Impact Experiments Between Coal Gangue and the Metal Plate and Coal Gangue Recognition Based on SVM and Serial Splicing Data Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Yang Yang, Qingliang Zeng
Impact contact behaviors with different velocities, direction and contact states occurred in the process of coal drawing between coal gangue particles and the hydraulic support greatly increase the difficulty of coal gangue recognition in top coal caving. In order to finally realize coal gangue recognition in top coal caving, this paper studied the impact behavior of a single particle coal gangue and
-
Production of Micro-holes on Duplex Stainless Steel 2205 by Electrochemical Micromachining: A Grey-RSM Approach Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 C. Gopinath, Poovazhagan Lakshmanan, S. C. Amith
Electrochemical micromachining (ECMM) is a non-traditional micro-fabrication technology developed to produce complex geometries on very hard and electrically conducting surfaces. Typical applications of ECMM include aerospace components, medical devices and gas turbine blades. Duplex stainless steel 2205 (DSS 2205) is an exceptional corrosion-resistant iron alloy with a nearly identical volume of austenite
-
Multi-objective optimization and Surface Morphology of M-42 AISI Steel Using Normal and Cryo-treated Brass Wire in Wire Cut EDM Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Anish Kumar, Renu Sharma, Rajneesh Gujral
Super-hard high-temperature resistant M-42 that is best cobalt steel with high hardness and hot strength finds the application in manufacturing of twist drills, milling cutters, taps, reamers, broaches etc. The wire cut EDM process was seen as a decent option over conventional machining forms. In this research work, the effect of normal brass wire (Nbw) and cryo-treated brass wire (CTbw) on M-42 steel
-
Prediction of Indirect Tensile Strength of Intermediate Layer of Asphalt Pavements Using Artificial Neural Network Model Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Dong-Hyuk Kim, Sang-Jik Lee, Ki-Hoon Moon, Jin-Hoon Jeong
The repair method for pavements should be selected considering the structural capacity of sublayers, in addition to the conditions observed at the pavement surface, to reduce the recurrence of distress in the repaired area. However, it is practically impossible to include the structural capacity of sublayers in the database of the pavement management system (PMS) because this would require additional
-
A Novel Quranic Search Engine Using an Ontology-Based Semantic Indexing Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Samia Zouaoui, Khaled Rezeg
Quran is the most significant religious document in the Arabic language in Islamic law. Several Quranic search engines have been designed and widely used for the past two decades. However, these search engines have certain limitations. For example, in many cases, the search is unable to retrieve relevant verses because it is based on keywords or root search and does not rely on the semantic relation
-
Dynamic Time Warping of Deep Features for Place Recognition in Visually Varying Conditions Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Saed Alqaraleh, A. H. Abdul Hafez, Ammar Tello
This paper presents a new visual place recognition (VPR) method based on dynamic time warping (DTW) and deep convolutional neural network. The proposal considers visual place recognition in environments that exhibit changes in several visual conditions like appearance and viewpoint changes. The proposed VPR method belongs to the sequence matching category, i.e., it utilizes the sequence-to-sequence
-
A New Method to Measure the Information Quality Based on Shannon Entropy Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-07 Hengqi Zhang, Wen Jiang, Xinyang Deng
When aggregating data from multi-source uncertain information, how to increase the certainty and reduce the conflict is still an open issue. This paper proposes a new method to measure information quality based on Shannon entropy, which can be used to measure the certainty or information provided by probability distributions. Furthermore, a method to obtain information quality-fused values from different
-
Analysis on the Procurement Cost of Construction Supply Chain based on Evolutionary Game Theory Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Zhuoran Tao, Bo Wang, Lingli Shu
The selection of building materials plays an important role in the control of engineering projects. The subject of this paper is to study the problem of balancing the relationship between the general contractor and building material suppliers in the construction supply chain. Firstly, to solve the problem, this paper from the perspective of material quality safety analyzes the problems between material
-
Study of the Double Wedge Cut Technique in Medium-Depth Hole Blasting of Rock Roadways Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Bing Cheng, Haibo Wang, Qi Zong, Ying Xu, Mengxiang Wang, Qiangqiang Zheng
A double wedge cut was used to improve the cut effects in the medium-depth hole blasting of rock roadways. First, the cavity formation mechanisms of single wedge cut and double wedge cut were analysed theoretically. The results show that the cavity formation resistance of the second-order wedge cut is reduced by the first-order wedge cut. Second, simulations of the two cut modes were conducted, which
-
Biological Activities of Avicennia marina Roots and Leaves Regarding Their Chemical Constituents Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Bandar A. Al-Mur
Mangrove plants (focally, Avicennia marina) are resources rich in bioactive substances, and they are considered as promising agents in various biological activities. Phytochemical analyses of the roots and leaves of Avicennia marina collected from the coast of Jeddah, Saudi Arabia, showed different proportions of various parameters which generally recorded higher values in root samples than those analyzed
-
An ANFIS Based Comprehensive Correlation Between Diagnostic and Destructive Parameters of Transformer’s Paper Insulation Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Md. Manzar Nezami, Md. Danish Equbal, Shakeb A. Khan, Shiraz Sohail
In this work, a fine correlation among destructive and diagnostic parameters of transformer’s paper insulation is presented. The degree of polymerization (DP) directly assesses the condition of the paper insulation strength and is measured through destructive procedure. Generally, 2-FAL, CO2 and CO are the aging products of paper decomposition and referred as diagnostic parameters. An Adaptive Neuro
-
Deep Learning for Discussion-Based Cross-Domain Performance Prediction of MOOC Learners Grouped by Language on FutureLearn Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Ismail Duru, Ayse Saliha Sunar, Su White, Banu Diri
Analysing learners’ behaviours in MOOCs has been used to identify predictive features associated with positive outcomes in engagement and learning success. Early methods predominantly analysed numerical features of behaviours such as the page views, video views, and assessment grades. Analysing extracted numeric features using baseline machine learning algorithms performed well to predict the learners’
-
Precipitation Behavior of Al 3 (Sc,Zr) Particles in High-Alloyed Al–Zn–Mg–Cu–Zr–Sc Alloy During Homogenization Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Yu Wang, Baiqing Xiong, Zhihui Li, Yong’an Zhang, Haitao Teng
Precipitation behavior of Al3(Sc,Zr) particles in a new high-alloyed Al–Zn–Mg–Cu–Zr–Sc aluminum alloy during homogenization was investigated by use of three-dimensional atom probe, transition electron microscope and high-resolution transition electron microscope. The results indicate that Al3Sc was the precursor of Al3(Sc,Zr) precipitate. The supersaturated solid solution containing Sc decomposed at
-
Impact of Nonlinear Rosseland Approximation on Flow of Newtonian Fluid with Unequal Diffusivities of Chemically Reactive Species Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 M. Sheikh, Z. Abbas, J. Hasnain, A. Nadeem, M. Sajid
This investigation studies the flow of a Newtonian fluid close to stagnation point past a stretching/shrinking plate embedded in a porous media. Heat transfer analysis with nonlinear thermal radiation (TR) is also carried out. Homogeneous-heterogeneous reactions with unequal diffusivities of reactants take place in the fluid. The controlling partial differential equations (DEs) of the existing model
-
Prolong Network Lifetime in the Wireless Sensor Networks: An Improved Approach Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-06 Nitin Kumar, Vinod Kumar, Tariq Ali, Muhammad Ayaz
This paper presents a novel approach for prolonging the network lifetime and reducing the energy being consumed within the wireless sensor networks (WSN). The sensor nodes are distributed in the geographical area in a heterogeneous manner and spread in an advanced and normal mode with high and low energy, respectively. All sensor nodes are organized in groups or clusters. Every cluster has a cluster
-
Dynamic response of buried fluid-conveying pipelines subjected to blast loading using shell theory Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 Xue Ling, Y. F. Zhang, Yan Qing Wang
In this study, the dynamic response of buried fluid-conveying pipelines subjected to blast loading using the Love shell theory has been investigated. The fluid is considered as ideal fluid, and the velocity potential is used to describe the fluid pressure acting on the pipeline. The governing equations of the buried fluid-conveying pipelines are derived through Hamilton’s principle. The modal superposition
-
Impact of Skin on the Movement of Nitrates in a Fractured Porous Media: Numerical Investigations Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 M. Berlin, N. Natarajan, M. Vasudevan, G. Suresh Kumar
The objective of this study is to analyse the movement of nitrates and dissolved oxygen under the effect of denitrification in a fracture–matrix (F–M) system with skin formation. An implicit finite difference scheme is developed to model the coupled nonlinear partial differential equations. A varying grid is considered at the fracture–skin interface to handle the mass transfer from the fracture to
-
Simultaneous Measurements in Shape Memory Alloy Springs to Enable Structural Health Monitoring by Self-Sensing Actuation Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 T. Devashena, K. Dhanalakshmi
The vital sensing parameter on self-sensing actuation in the spring form of shape memory alloy (SMA) is determined through experimental analysis. A unique measurement technique is adopted that interlinks the electro–thermo–mechano features during the shape memory effect in NiTi, NiTiCu, and NiTiFe springs. The influence of the spring index, the number of active turns, material composition, and transition
-
Tribological Performance of Sub-Micron Al 2 O 3 -Reinforced Aluminum Composite Brake Rotor Material Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 M. M. A. Baig, A. M. Al-Qutub, I. M. Allam, Faheemuddin Patel, Abdul Samad Mohammed
Friction and wear characteristics of 6061 Al alloy composite reinforced with sub-micron Al2O3 particles (Al/Al2O3 submicron composite) against commercial semi-metallic brake pad material were determined in dry sliding condition at different loads and sliding speeds using a pad-on-disc configuration. The tribological performance of Al/Al2O3 submicron composite was evaluated against conventional grey
-
Analysis of Driver Performance Using Hybrid of Weighted Ensemble Learning Technique and Evolutionary Algorithms Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 Afsaneh Koohestani, Moloud Abdar, Sadiq Hussain, Abbas Khosravi, Darius Nahavandi, Saeid Nahavandi, Roohallah Alizadehsani
Having a full situational awareness while driving is one of the most important perceptions for safe driving which can be reduced by various factors such as in-vehicle infotainment, distraction, or mental load leading. Machine learning methods are being used to optimize for the identification of these inhibiting factors. To do so, three types of data were used: biographic features, physiological signals
-
Artificial Intelligence Approach in Predicting the Effect of Elevated Temperature on the Mechanical Properties of PET Aggregate Mortars: An Experimental Study Arab. J. Sci. Eng. (IF 1.711) Pub Date : 2021-01-05 Andaç Batur Çolak, Kubilay Akçaözoğlu, Semiha Akçaözoğlu, Gülhan Beller
In this study, the effect of high temperature on the flexural and compressive strength of mortars containing waste PET aggregates was investigated experimentally. The mortar samples prepared in 5 different concentrations with a total of 2.5%, 5%, 10%, 20% and 30% PET aggregate substitution were heated up to 100, 150, 200, 250, 300 and 400 °C. After waiting for 1, 2 and 3 h at these temperatures, flexural