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15th International Conference on Information and Knowledge Technology, IKT 2024

作者： Tabatabaei, Alireza A. Sameti, Pouria Bohlooli, Ali Cyber-Physical System Lab. Faculty of Computer Engineering University of Isfahan Isfahan Iran

ISBN: (纸本)9798331522254

Although high-performance artificial intelligence (AI) models require substantial computational resources, embedded systems are constrained by limited hardware capabilities, such as memory and processing power. On the other hand, embedded systems have a broad range of applications, making the integration of AI and embedded systems a prominent topic in both hardware and AI research. Creating powerful speech embeddings for embedded systems is challenging, as such models, like Wave2Vec, are typically computationally intensive. Additionally, the scarcity of data for many low-resource languages further complicates the development of high-performance models. To address these challenges, we utilized BERT to generate speech embeddings. BERT was selected because, in addition to producing meaningful embeddings, it is trained on numerous low-resource languages and facilitates the design of efficient decoders. This study introduces a compact speech encoder tailored for low-resource languages, capable of functioning as an encoder across a diverse range of speech tasks. To achieve this, we utilized BERT to generate meaningful embeddings. However, due to the high dimensionality of BERT embeddings, which imposes significant computational demands on many embedded systems, we applied dimensionality reduction techniques. The reduced-dimensional vectors were subsequently used as labels for speech data to train a model composed of convolutional neural networks (CNNs) and fully connected layers. Finally, we demonstrated the encoder's effectiveness through an application in speech command recognition. © 2024 IEEE.

关键词： Embedded systems

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Synergistic adsorption of methylene blue using ternary composite of phosphoric acid geopolymer, calcium alginate, and sodium lauryl sulfate

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Environmental Science and Pollution Research 2024年 1-20页

作者： Khan, Muhammad Irfan Sufian, Suriati Shamsuddin, Rashid Farooq, Muhammad Saafie, Nabilah Department of Chemical Engineering Universiti Teknologi PETRONAS Perak Bandar Sri Iskandar32610 Malaysia Institute of Autonomous System Universiti Teknologi PETRONAS Perak Seri Iskandar Malaysia National Centre of Excellence for Physical Chemistry University of Peshawar Peshawar Pakistan Department of Chemical Engineering Faculty of Engineering Islamic University of Madinah Madinah42311 Saudi Arabia

The removal of dyes from the aquatic ecosystem is necessary being a major threat to life. For enhanced remediation of methylene blue (MB) dye, a new ternary biopolymer-geopolymer-surfactant composite adsorbent is synthesized by combining phosphoric acid geopolymer (PAGP), calcium alginate (Alg), and sodium lauryl sulfate (SLS). During the synthesis of the composites, PAGP and SLS were mixed with the alginate matrix, producing porous hybrid beads. The PAGP-SLS-alginate (PSA) beads prepared were characterized using different analytical tools, i.e., scanning electron microscopy (SEM), Fourier transform infrared spectrophotometry (FTIR), X-ray diffractometry (XRD), surface area and porosimetery (SAP), and thermogravimetric analysis (TGA). To ascertain the ideal conditions for the adsorption process, a batch reactor procedure was used to investigate the effects of several parameters on MB adsorption, including pH (2, 4, 6, 8, 10), PSA adsorbent dosage (0.06–0.12 g), MB concentration (50–500 mg/L), contact time (15 to 300 min), and temperature (25, 35, and 45 °C). The SEM investigation indicated that ~ 1860 μm-sized PSA beads with 6–8 μm voids are generated. Based on XRD, FTIR, and SAP examinations, the material is amorphous, having numerous functional groups and an average pore size of 6.42 nm. Variation of pH has a little effect on the adsorption process, and the pH of 7.44 was found to be the pHpzc of the PSA beads. According to the findings of the batch study, equilibrium adsorption was obtained in 270–300 min, showing that the adsorption process was moderately slow-moving and effective. The dye adsorption linearly increased with initial dye concentration over concentration range of 50–500 mg/L and reciprocally decreased with rise in temperature. 0.06 g adsorbent dose, 25 °C, pH10, and 270 min were found to be the better conditions for adsorption experiments. Langmuir isotherm fitted well compared to Freundlich, Temkin, and Dubinin-Radushkevich (DR) isotherm models on

关键词： Adsorption

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Quasinormal modes of a black hole surrounded by a fluid of strings in Rastall gravity

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Chinese Physics C 2025年第2期49卷 193-201页

作者： Ming Zhang Rui-Hong Yue De-Cheng Zou Faculty of Science Xi’an Aeronautical UniversityXi’an 710077 China National Joint Engineering Research Center for Special Pump System Technology Xi’an Aeronautical UniversityXi’an 710077China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China College of Physics and Communication Electronics Jiangxi Normal UniversityNanchang 330022China

In this paper,we explore the quasinormal modes(QNMs)of a black hole surrounded by a fluid of strings within the framework of Rastall *** analyze the behavior of scalar,electromagnetic,and gravitational perturbations,focusing on the influences of black hole charge Q and angular momentum l on the quasinormal *** numerical results reveal a significant dependence on parameterε.These trends are consistent across different types of perturbations,emphasizing the relationship between black hole parameters and QNM behavior.

关键词： Black hole quasinormal modes Rastall gravity

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Embedded Speech Encoder for Low-Resource Languages

Embedded Speech Encoder for Low-Resource Languages

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Conference on Information and Knowledge Technology

作者： Alireza A. Tabatabaei Pouria Sameti Ali Bohlooli Cyber-Physical System Lab Faculty of Computer Engineering University of Isfahan Isfahan Iran

ISBN: (数字)9798331522254

ISBN: (纸本)9798331522261

关键词： Embedded systems Computational modeling Memory management Bidirectional control Speech recognition Encoding Hardware Data models Vectors Artificial intelligence

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Comparative study of electronic structure in ferromagnetic Heusler alloys Ni2MnX (X = Al, Ga, In) using the quasi-particle self-consistent GW method

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Journal of the Magnetics Society of Japan 2024年第6期48卷 94-107页

作者： Luštinec, J. Obata, M. Majumder, R. Hyodo, K. Kotani, T. Kalvoda, L. Oda, T. Division of Mathematical and Physical Sciences Graduate School of Natural Science and Technology Kanazawa Uni. Kakuma machi Kanazawa920-1192 Japan Department of Solid State Engineering Faculty of Nuclear Science and Engineering Czech Technical Uni. in Prague Břehová 7 Prague 1115 19 Czech Republic Advanced Mechanical and Electronic System Research Center Department of Engineering Tottori Uni. Tottori680-8552 Japan

A comparative study of cubic Heusler alloys Ni2MnX (X = Al, Ga, In) was performed to explain the differences in material properties using a first-principles electronic structure calculation of quasi-particle self-consistent GW (QSGW) method. The obtained electronic structures indicate a similar density of states (DOS) of Ni 3d eg orbitals on the Fermi level for all the studied materials, implying a promotion to a band Jahn-Teller (BJT) distortion. The generalized susceptibility analysis suggests some instability of the cubic high symmetry phase and indicates, that the Ga containing material is the one which is the most pronounced to 10M modulation due to this instability. Taking the advantage of accurate first-principles electronic structure calculations performed by QSGW, the U parameters of Hubbard correction on Mn and Ni atoms were determined using the density functional theory (DFT) approach with generalized gradient approximation (GGA), so that the local and total QSGW magnetic moments are reproduced. © 2024 The Magnetics Society of Japan.

关键词： Magnetic susceptibility

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Effect of geometry simplification and boundary condition specification on flow field and aerodynamic noise in the train head and bogie region of high-speed trains

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2024年第9期25卷 716-731页

作者： Jiawei SHI Yuan HE Jiye ZHANG Tian LI State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong UniversityChengdu 610031China Institute of Sound and Vibration Research Faculty of Engineering and Physical SciencesUniversity of SouthamptonSouthampton SO171BJUK

The purpose of this study is to determine a suitable modeling method to make computational fluid dynamics(CFD)simulation more efficient for aeroacoustics optimization of the bogie region of high-speed *** this end,four modeling methods are considered,which involve different geometry simplifications and boundary condition *** corresponding models are named the three-car marshalling model,computational domain shortening model,carbody shortening model,and sub-domain *** the detached eddy simulation(DES)model and Ffowcs Williams-Hawkings(FW-H)equation,the unsteady flow field and far-field noise of the four models are *** evaluate the effect of the different modeling methods,the time-averaged flow field,fluctuating flow field,and far-field noise results of the four models are compared and analyzed in detail with the results of the three-car marshalling model used as basis for *** results show that the flow field results of the bogie region predicted by the four models have relatively high ***,the usage of the non-time varying outlet boundary conditions in the computational domain shortening model and sub-domain model could affect the pressure fluctuation on the upstream carbody *** only the bogie region is used as the source surface,the differences between the far-field noise results of the three simplified models and the three-car marshalling model are all within 1 dB;when the train head is used as the source surface,the results of the carbody shortening model and the three-car marshalling model are more consistent.

关键词： Bogie region Train head Flow field Aerodynamic noise Geometry simplification Boundary conditions

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Natural rubber-based pressure sensitive adhesive as a drug carrier

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Materials Today: Proceedings 2023年 75卷 9-14页

作者： Puyathorn, Napaphol Limsirilak, Sasiprapa Pichayakorn, Wiwat Kalkornsurapranee, Ekwipoo Phaechamud, Thawatchai Program of Pharmaceutical Engineering Faculty of Pharmacy Silpakorn University Nakhon Pathom 73000 Thailand Faculty of Pharmacy Siam University Bangkok 10160 Thailand Department of Pharmaceutical Technology Faculty of Pharmaceutical Sciences Prince of Songkla University Songkhla 90110 Thailand Division of Physical Science Faculty of Science Prince of Songkla University Songkhla 90110 Thailand Department of Pharmaceutical Technology Faculty of Pharmacy Silpakorn University Nakhon Pathom 73000 Thailand Natural Bioactive and Material for Health Promotion and Drug Delivery System Group Faculty of Pharmacy Silpakorn University Nakhon Pathom 73000 Thailand

Natural rubber (NR) has been utilized in several products from its interesting unique properties. This study aimed to develop the pressure-sensitive adhesives (PSA) as the transdermal patches from NR by two-roll mill kneading technique. Hydroxyethyl cellulose (HEC) was blended as a tackifier agent. The propranolol HCl and ibuprofen at different parts per hundred of rubber (phr) were loaded into this developed PSA. The appearance, thickness, crystallinity, contact angle, water sorption and erosion, adhesion, and in vitro drug permeation of these patches were evaluated. The thickness of all patches was in the range of 0.46–1.07 mm. The drug-loaded patches showed diverse unique topographies depended on both type and amount of drug incorporation. From powder X-ray diffraction analysis, the plain NR-PSA showed the amorphous structure, while the halo pattern inserted with sharp drug peaks were observed on drug-loaded PSA. The contact angle of all samples was in the range of 80–90° indicating their hydrophobic surface. However, they displayed an increased % water sorption with the time of soaking. The 2–4 N adhesion force was evident for all fabricated drug-loaded PSAs. The propranolol HCl permeated from PSA notably lower than ibuprofen. The residual of the drugs in patches was about 85–90 %. These results provided the basic physicochemical properties for the further development of PSA as the transdermal patch. [copyright information to be updated in production process] © 2022

关键词： Adhesion

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Signal Processing and AI-based Assessment of Rehabilitation Exercises for Diastasis Recti Abdominis

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Computer systems Science & engineering 2023年第10期47卷 333-348页

作者： R.Karthik R.Menaka P.Ponmathi Daehan Won P.Vinitha Joshy J.G.Aravindan S.Harshavardhan K.V.S.D.Aashish kumar R.Akileshkumar Centre for Cyber Physical Systems(CCPS) School of Electronics EngineeringVellore Institute of TechnologyChennai600127India Faculty of Physiotherapy Sri Ramachandra Institute of Higher Education and ResearchChennai600116India System Sciences and Industrial Engineering Binghamton UniversityBinghamton13902-6000USA School of Electronics Engineering Vellore Institute of TechnologyChennai600127India

Diastasis Recti Abdominis(DRA)is the separation of abdominal recti muscles which occurs in women during their pregnancy and postpartum *** is because of the stretching of the linea alba,a fibrous connective tissue on the abdominal *** Linea Alba is elastic and retracts back after the delivery of the *** this tissue gets overstretched,it loses its elasticity and the gap in the abdominals may not be closed leading to *** motive of this research is to analyze the postpartum rehabilitation for signals from Inertial Measurement Unit(IMU)*** conservative treatment for women who are experiencing DRA is given in the form of *** physiotherapy exercises focus on the recti abdominis muscle to bring back the Linea alba *** will be a difficult process for the physiotherapist to monitor,whether patients did the exercises correctly or *** the exercises are not correct,they will not be effective in the reduction of inter-recti *** research aims to analyze the effectiveness of IMU signals in classifying the correct and incorrect *** was inferred that the IMU signals are effective in classifying the correct and incorrect exercises with an accuracy of 92%.

关键词： DRA IMU inter-recti distance rehabilitation machine learning

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Au-doped mesoporous SiO2 scattering layer enhances light harvesting in quasi Solid-State dye-sensitized solar cells

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Journal of King Saud University - engineering Sciences 2024年第8期36卷 581-590页

作者： Rachmat, Devita Syarifah, Ra'idah Paramudita, Intan Fadhilah, Nur Haekal, Muhammad Husain Wahyuono, Ruri Agung Hidayat, Rachmat Zakaria, Rozalina Suendo, Veinardi Risanti, Doty Dewi Department of Engineering Physics Faculty of Industrial Technology and System Engineering Institut Teknologi Sepuluh Nopember East Java Surabaya60111 Indonesia Research Center of Testing Technology Indonesian Institute Science Banten South Tangerang15314 Indonesia Institute for Physical Chemistry and Abbe Center of Photonics Friedrich Schiller University Jena Helmholtzweg 4 Jena07743 Germany Department of Physics Faculty of Mathematics and Science Institut Teknologi Bandung West Java Bandung40132 Indonesia Photonics Research Center Department of Physics University of Malaya Kuala Lumpur50603 Malaysia Department of Chemistry Faculty of Math and Science Institut Teknologi Bandung West Java Bandung40132 Indonesia

This study investigates the morphological effect of different Au-doped SiO2 scattering layers on the performance of dye-sensitized solar cells (DSSCs). Particularly, the SiO2 sources were varied to yield different geometries, i.e., tetraethyl orthosilicate (TEOS) templated SiO2, Sidoarjo mud (LuSi) extracted SiO2, and commercial silica glass sphere. The microstructure, as well as physical, electronic, and optical properties of different Au-doped SiO2 particles, were characterized using SEM-EDX, TEM, BET, XRD, and various spectroscopy techniques. The photoelectrochemical performance of quasi-solid state DSSCs was indicated by current density–voltage (J-V) response, external quantum efficiency spectra, and the impedance response. The results indicate that the performance of TiO2-based DSSCs is enhanced quite significantly due to the improved photocurrent generation and fill factor. The short circuit current density is found up to 370% higher (and hence, the conversion efficiency) than the reference cell upon incorporating Au-doped crystalline SiO2 extracted from LuSi (Voc = 0.89 V, Jsc = 1.28 mA‧cm−2, FF = 0.65, and η = 0.75%). This substantial photocurrent enhancement stems from the combined effect of efficient light scattering by submicron SiO2 particles, surface plasmon resonance, and reduced interfacial recombination by SiO2 insulation. In addition, the optimum size of SiO2 particles is deduced as the results indicate the size-scattering dependency which controls the gain and loss of photocurrent due to the type of scattering. © 2021 The Authors

关键词： Silica

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Coexisting Magnetism, Ferroelectric, and Ferrovalley Multiferroic in Stacking-Dependent Two-Dimensional Materials (vol 24, pg 3541, 2024)

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NANO LETTERS 2024年第17期24卷 5393-5394页

作者： Xun, Wei Wu, Chao Sun, Hanbo Zhang, Weixi Wu, Yin-Zhong Li, Ping State Key Laboratory for Mechanical Behavior of Materials Center for Spintronics and Quantum System School of Materials Science and Engineering Xi’an Jiaotong University Xi’an Shaanxi 710049 People’s Republic of China Faculty of Electronic Information Engineering Huaiyin Institute of Technology Huaian 223003 People’s Republic of China Department of Physics and Electronic Engineering Tongren University Tongren 554300 People’s Republic of China School of Physical Science and Technology Suzhou University of Science and Technology Suzhou 215009 People’s Republic of China State Key Laboratory for Surface Physics and Department of Physics Fudan University Shanghai 200433 China

Two-dimensional (2D) multiferroic materials have widespread application prospects in facilitating the integration and miniaturization of nanodevices. However, the magnetic, ferroelectric, and ferrovalley properties in one 2D material are rarely coupled. Here, we propose a mechanism for manipulating magnetism, ferroelectric, and valley polarization by interlayer sliding in a 2D bilayer material. Monolayer GdI2 is a ferromagnetic semiconductor with a valley polarization of up to 155.5 meV. More interestingly, the magnetism and valley polarization of bilayer GdI2 can be strongly coupled by sliding ferroelectricity, making these tunable and reversible. In addition, we uncover the microscopic mechanism of the magnetic phase transition by a spin Hamiltonian and electron hopping between layers. Our findings offer a new direction for investigating 2D multiferroic devices with implications for next-generation electronic, valleytronic, and spintronic devices.

关键词： two-dimensional multiferroic sliding ferroelectricity ferrovalley magnetic phase transition d-orbital hopping

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