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Defence Technology（防务技术） 2024年第12期42卷 31-58页

作者： Tawfiq Aljohani Abdulaziz Almutairi Department of Electrical Engineering College of Engineering at YanbuTaibah UniversityYanbu41911Saudi Arabia Department of Electrical Engineering College of EngineeringMajmaah UniversityAlmajmaah11952Saudi Arabia

With the continuous development of transportation electrification,the cybersecurity of energy infrastructure has become increasingly ***,EVs resemble a significant tool to carryout cyberattacks since EVs are not only seen as dynamic loads but also as mobile energy sources that establish two-way communications with several players in the *** taxonomy aims to provide a comprehensive overview of cyberattacks against EVs from four distinct *** first is the research domains of EVs application,which investigates the different fields of research related to the development and application of EVs and how they are susceptible to cyber *** second is the CIAbased attacks,which examines the threats to the confidentiality,integrity,and availability of EVs'sensitive information and critical *** third taxonomy discusses the countermeasures and defensive mechanisms to secure the EVs against cyberattacks,including preventive measures,detection algorithms,response strategy,and recovery *** fourth taxonomy is the verification and validation methodologies,which explores the software tools and hardware testbeds used to test and evaluate the security of EVs against cyber ***,this taxonomy presents an understanding of the current state of cyberattacks against EVs and serves as a valuable resource for researchers and practitioners in the fields of cybersecurity and electric mobility.

关键词： Cybersecurity Electric vehicles Charging stations Cybersecurity of energy systems Cyberattacks

Teaching Syntactic Relations:A Cognitive Semiotic Perspective

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Language and Semiotic Studies 2017年第2期3卷 1-21页

作者： Ghsoon Reda yanbu university College

This paper suggests a theoretical model for teaching syntactic relations to foreign students of English Linguistics using insights from Cognitive Grammar as developed in Langacker(e.g.1987,1991,1999) and elaborated on in Radden and Dirven(2007). The model deals with syntactic relations as participants in a prototypically structured network of events, radiating out from the experiential action chain schema(a skeletal concept of force dynamics involved in the interaction between entities)(see Langacker, 1999). This involves dealing with syntactic relations as meaning-making tools that collaborate with the verb in a regular manner manipulating the prototypical schema. The aim is to draw attention to the need to add a cognitive semiotic dimension to the teaching of sentence structure. Such a dimension exposes learners to the cognitive factors behind grammatical meaning making and may, therefore, result in a better understanding of language structure and use on the part of learners who can become English language teachers.

关键词： action chain schema Cognitive Grammar figure-ground perception event schemas syntactic relations

High performance decoupled active and reactive power control for three-phase grid-tied inverters using model predictive control

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Protection and Control of Modern Power Systems 2021年第1期6卷 311-329页

作者： Mohamed Azab EEET Department Yanbu Industrial CollegeYanbu AL SinaiyahSaudi Arabia EEET Department Faculty of EngineeringBenha UniversityBanhaEgypt

Finite control set-model predictive control (FCS-MPC) is employed in this paper to control the operation of a three-phase grid-connected string inverter based on a direct PQ control scheme. The main objective is to achieve high-performance decoupled control of the active and reactive powers injected to the grid from distributed energy resources (DER).The FCS-MPC scheme instantaneously searches for and applies the optimum inverter switching state that can achieve certain goals, such as minimum deviation between reference and actual power;so that both power components (P and Q) are well controlled to their reference *** addition, an effective method to attenuate undesired cross coupling between the P and Q control loops, which occurs only during transient operation, is investigated. The proposed method is based on the variation of the weight factors of the terms of the FCS-MPC cost function, so a higher weight factor is assigned to the cost function term that is exposed to greater disturbance. Empirical formulae of optimum weight factors as functions of the reference active and reactive power signals are proposed and mathematically derived. The investigated FCS-MPC control scheme is incorporated with the LVRT function to support the grid voltage in fulfilling and accomplishing the up-to-date grid codes. The LVRT algorithm is based on a modification of the references of active and reactive powers as functions of the instantaneous grid voltage such that suitable values of P and Q are injected to the grid during voltage *** performance of the elaborated FCS-MPC PQ scheme is studied under various operating scenarios, including steady-state and transient conditions. Results demonstrate the validity and effectiveness of the proposed scheme with regard to the achievement of high-performance operation and quick response of grid-tied inverters during normal and fault modes.

关键词： Model predictive control Finite control set Grid-connected inverter Active power Reactive power Distributed generation Low voltage ride through PQ theory FCS-MPC LVRT

Attention-Based Bi-LSTM Model for Arabic Depression Classification

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Computers, Materials & Continua 2022年第5期71卷 3091-3106页

作者： Abdulqader M.Almars College of Computer Science and Engineering Taibah UniversityYanbuSaudi Arabia

Depression is a common mental health issue that affects a large percentage of people all around the ***,people who suffer from this mood disorder have issues such as low concentration,dementia,mood swings,and even suicide.A social media platform like Twitter allows people to communicate as well as share photos and videos that reflect their ***,the analysis of social media content provides insight into individual moods,including *** studies have been conducted on depression detection in English and less in *** detection of depression from Arabic social media lags behind due the complexity of Arabic language and the lack of resources and techniques *** this study,we performed a depression analysis on Arabic social media content to understand the feelings of the users.A bidirectional long short-term memory(Bi-LSTM)with an attention mechanism is presented to learn important hidden features for depression detection *** proposed deep learning model combines an attention mechanism with a Bi-LSTM to simultaneously focus on discriminative features and learn significant word weights that contribute highly to depression *** order to evaluate our model,we collected a Twitter dataset of approximately 6000 *** data labelling was done by manually classifying tweets as depressed or not *** results showed that the proposed model outperformed state-of-the-art machine learning models in detecting *** attention-based BiLSTM model achieved 0.83%accuracy on the depression detection task.

关键词： Depression detection social media deep learning Bi-LSTM attention mode

Stabilization and Synchronization of Discrete-time Fractional Chaotic Systems with Non-identical Dimensions

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Acta Mathematicae Applicatae Sinica 2021年第3期37卷 523-538页

作者： Samir BENDOUKHA Department of Electrical Engineering College of EngineeringYanbuTaibah UniversitySaudi Arabia

This paper investigates the stabilization and synchronization of two fractional chaotic maps proposed recently,namely the 2D fractional Hénon map and the 3D fractional generalized Hénon *** show that although these maps have non–identical dimensions,their synchronization is still *** proposed controllers are evaluated experimentally in the case of non–identical orders or time–varying *** methods are used to illustrate the results.

关键词： discrete chaos fractional discrete calculus Hénon based maps stabilization synchronization

Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期68卷 192-200页

作者： Dongying Wang Shulan Pu Yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui Zeng Xi Luo Yuntao Zhang Yuqin Dong Jin Zhong Zhang Yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

关键词： photocatalysis hydrogen peroxide oxygen reduction reaction potassium doping cyano group

Ferroresonance Overvoltage Mitigation Using STATCOM for Grid-connected Wind Energy Conversion Systems

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Journal of Modern Power Systems and Clean Energy 2022年第2期10卷 407-415页

作者： Mohamed I.Mosaad Nehmdoh A.Sabiha yanbu Industrial College Yanbu A1 SinaiyahKingdom of Saudi Arabia the Electrical Engineering Department Faculty of EngineeringMenofia University32511 Shebin ElkomEgyptand she is on leave to work at the Electrical Engineering DepartmentCollege of EngineeringTaif University21974 TaifKingdom of Saudi Arabia

We present the ferroresonance overvoltage mitigation concerning the power systems of the grid-connectcd wind energy conversion systems(WECSs).WECS is considered based on a doubly-fed induction generator(DFIG).Ferroresonance overvoltage associated with a single-pole outage of the line breaker is mitigated by fast regulating the reactive power using the static compensator(STATCOM).STATCOM controller is introduced,in which t>\o incorporated proportional-integral(PI)controllers are optimally tuned using a modified flow-er pollination algorithm(MFPA)as an optimization *** show the capability of the proposed STATCOM controller in mitigating the ferroresonance overvoltage,two test cases are introduced,which are based on the interconnection status of the power transformer used with the grid-connected *** results show that the ferroresonance disturbance can occur for the power transformers installed in the wind farms although the transformer terminals are interconnected,and neither side of the transformer is ***,as a mitigation method of ferroresonance overvoltage,the proposed STATCOM controller succeeds in improving the system voltage profile and speed profile of the wind turbine as well as protecting the system components against the ferroresonance overvoltage.

关键词： Ferroresonance overvoltage doubly-fed induction generator(DFIG) static compensator(STATCOM) wind energy conversion system(WECS).

Experimental results of the tribology of aluminum measured with a pin-on-disk tribometer: Testing configuration and additive effects

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Friction 2016年第2期4卷 124-134页

作者： S.M.H.AHMER L.S.JAN M.A.SIDDIG S.F.ABDULLAH Department of Physics GS Faculty Yanbu University College Yanbu al Sinayiah 41912 Kingdom of Saudi Arabia Department of Physics Faculty of Science and Technology al Neelain University Khartoum 11111 Sudan Mechanical Engineering Department UNITEN Kajang 43009 Malaysia

The friction coefficient, wear rate, and wear coefficient of the aluminum metal surface were measured at room temperature (≈300 K) with a pin-on-disk machine at a fixed load of 196.2 N. Two different testing configurations were adopted: (1) aluminum pin vs. Helix oil-on-steel disk (AHS) and (2) aluminum pin vs. 10% Polytron plus 90% helix oil-on-steel disk (APS). In the AHS configuration, the wear of the aluminum surface was found to be approximately 70 μm; however, in the APS configuration the wear dropped to 20 μm, revealing a marked decrement of one-third of the wear of aluminum. The volume wear rate of the metal in the unaided Helix oil was estimated to be 1.28×10–3 mm3/min. The additive minimized the volume wear rate of the aluminum metal by orders of magnitude to 6.08×10–5 mm3/min. Similarly, the wear coefficient of the aluminum pin, calculated in the AHS configuration, rendered a value of 1.27×10–10 m2/N. In the APS configuration, the same parameter was 4.22×10–11 m2/N, that is to say, an order of magnitude lower than the preceding value. The observed coefficient of friction for aluminum is 0.012 in Helix oil and falls to a remarkably lower value of 0.004 through the Polytron additive. The experimental findings demonstrate that Polytron additive substantially lessens the wear of the aluminum surface; in effect, the wear coefficient and the wear rate decline linearly. This singularity may be linked to the ability of Polytron to impregnate the crystal structure of the metal due to its ionic character and the consequent adherence to the metallic surface as a hard surface layer.

关键词： antiwear Polytron additive aluminum metal lubrication friction

The Pragmatics of the Rhetorical Question in Selected(English)Qur’an Chapters

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Language and Semiotic Studies 2020年第4期6卷 103-125页

作者： Waheed A.Bamigbade Lawan Dalha Obafemi Awolowo university Nigeria yanbu university College Saudi Arabia

This paper interrogates the pragmatic choice of the rhetorical question(RQ)as a linguistic resource in some disputational discourse in the verses of the English translated Qur’*** argues that the choice of this sentence-type not only puts the speaker in a position of control in powerful assertion of facts,but also strengthens the pragmatic acts in the context to be more *** Mey’s(2001)Pragmatic Acts theory and Caponigro and Sprouse’s(2007)Concept of Common Ground,the paper does a close reading of the last forty Quranic chapters for a critical analysis and finds that RQ accounts for 15%(61)of the 410 verses in the seventeen(17)chapters that have RQs out of the last forty chapters *** find that the Authorial Voice in the Qur’an employs the RQ as an argumentative strategy to perform the pragmatic acts of challenging,inviting,affirming,reminding,reinforcing,assuring,appealing,and warning in series of intellectual engagements with the addressees in order to put them in a reflective *** is concluded that the RQ is an effective,dialogic,evidence-gathering,change-seeking pragmatic tool for securing improved attitude and ideological understanding from the *** are sought after to be convinced by the Speaker in a dialogue,and then left alone to decide,which presents the Speaker as One that uses rational argument in the context of disputation to persuade humans in real dialogues so as to seek change.

关键词： rhetorical question(RQ) the(English)Qur’an pragmatic acts common ground change-seeking pragmatic acts of challenging reinforcing and affirming

Intention to Use Mobile Augmented Reality in the Tourism Sector

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Computer Systems Science & Engineering 2021年第5期37卷 187-202页

作者： Malik Khlaif Gharaibeh Natheer Khlaif Gharaibeh Mohammad Ayoub Khan Waleed Abdel karim Abu-ain Musab Kasim Alqudah Faculty of Business Jadara UniversityIrbid21110Jordan College of Computer Science&Engineering at yanbu Taibah UniversityYanbu41911Saudi Arabia College of Computing and Information Technology University of BishaBisha67714Saudi Arabia College of Community Taibah UniversityBadr46354Saudi Arabia

This article examines the main variables that influence the intention to use Augmented Reality(AR)applications in the tourism sector in *** study model has been constructed based on the unified theory of acceptance and the use of technology2(UTAUT2),by incorporating a new construct(aesthetics)to explore the usage intention of Mobile Augmented Reality in Tourism(MART).A questionnaire was used and distributed to a sample of 450 *** were analyzed using the Smart PLS version *** testing 12 hypotheses.29 measurement items were carefully reviewed based on previous studies that were selected to assess the research *** findings revealed that the proposed model elucidates 35.7%of the variance in the users’intention to use *** results also showed that both performance expectancy and aesthetics were found to be the most significant factors at level(0.001).Four variables,respectively,were at level(0.01)which consisted of social influence,facilitating conditions,hedonic motivation,and price *** weakest effect was effort expectancy at level(0.05).As the use of AR has become important for tourists,this study establishes a research base that can be built upon for future *** developers can benefit from the results of this research to design and deliver this service successfully and to ensure that its adoption by users is achieved.

关键词： Intention to use UTAUT2 aesthetics performance expectancy augmented reality social influence effort expectancy MART AR