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Electrical, Computer and Energy Technologies (ICECET), International Conference on

作者： Wen-Cheng Lai Bachelor Program in Industrial Projects National Yunlin Univ. of Science and Technology Taiwan R. O. C. National Yunlin Univ. of Science and Technology Taiwan R. O. C.

ISBN: (纸本)9781665442329

This article presents mixing receiver of the low noise amplifier with back-gated QVCO using double balance mixer with doublers to merge low noise amplifier and LC-resonator quadrature voltage-controlled oscillator (QVCO) form balun circuit. The proposed QVCO can degrade NMOS subthreshold voltage. The proposed double balance mixer with doublers describes broadband integrated design, operation principle and experimental of the mixing receiver from low noise amplifier (LNA) and QVCO with balun circuit. The proposed QVCO circuit is composed of an LC resonator (C is a parasitic capacitor), NMOS cross-coupled, back gate resister, bias resistor, and DC block of capacitors. The mixing receiver implemented in tsmc CMOS process can be used in wireless radio frequency communication systems.

关键词： Wireless communication Resistors Low-noise amplifiers Baluns Voltage-controlled oscillators Capacitors Receivers

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Bandpass Continuous-time Sigma-delta Modulators for PLL Chip Design in Wireless Charging Module

Bandpass Continuous-time Sigma-delta Modulators for PLL Chip...

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International Future Energy Electronics Conference (IFEEC)

作者： Wen-Cheng Lai Wen Liu Bachelor Program in Industrial Projects National Yunlin University of Science and Technology Taiwan R.O.C. National Yunlin University of Science and Technology Taiwan R.O.C. School of Advanced Technology Xi’an Jiaotong-Liverpool University Suzhou China

ISBN: (纸本)9781665434492

This article employing PLL frequency synthesis to consist of continuous-time (CT) sigma-delta ($\Sigma \Delta$) modulator, voltage-controlled oscillator with divider and bandpass filter with phase detector is presented and implemented in tsmc 0.18 um CMOS technology. The phase lock loop (PLL) is proposed to lock the phase discrepancy among the wireless charging transmitting current and receiving voltage, at which report the module achieves excellence efficiency from RF wireless analog transmitter and receiver.

关键词： Wireless communication Radio frequency Sigma-delta modulation Transmitters Inductive charging Receivers Detectors

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A 35 V-5 V monolithic integrated GaN-based DC-DC floating buck converter

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Semiconductor Science and technology 2023年第9期38卷 095001-095001页

作者： Zhu, Yuhao Su, Haodong Li, Fan Li, Ang Lei, Xiaohaoyang Cui, Miao Lai, Wen-Cheng Wen, Huiqing Liu, Wen School of Advanced Technology Xi’an Jiaotong-Liverpool University Suzhou China Department of Electrical Engineering and Electronics University of Liverpool Liverpool United Kingdom Bachelor Program in Industrial Projects National Yunlin University of Science and Technology Yunlin Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology Yunlin Taiwan

The paper presents the development of a GaN DC-DC power converter with a pre-driver module and power device based on a monolithic integrated GaN E/D-mode metal-insulator-semiconductor high electron mobility transistors (MIS-HEMTs) platform. The pre-driver module with direct coupled field effect transistor logic circuit structure has been monolithically integrated with a GaN power transistor on a Si-based AlGaN/GaN commercial epitaxial wafer. The MIS-HEMTs structure adopts an insulated gate dielectric layer to suppress the leakage current and increase gate voltage robustness. The GaN-based floating buck converter employs a 1 mH inductor and a 9 μF capacitor to achieve 35 V-5 V power conversion. As a result, the pre-driver module is capable of delivering a 10 V driving voltage. GaN monolithic integration of the pre-driver module and power device can reduce the system area in the DC-DC application, which allows for an integrated chip size of 1.8 mm2 © 2023 IOP Publishing Ltd

关键词： III-V semiconductors

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Acoustic Scene Classification Using Perceptually Weighted Log Mel Spectrogram and Buttom-up Broadcast Neural Network

Acoustic Scene Classification Using Perceptually Weighted Lo...

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IEEE International Conference on Consumer Electronics-Taiwan (ICCE-TW)

作者： Riyad Ali Ahmad Abuirbaiha Chang-Hsing Lee Cheng Chang Lien Ph.D. Program in Engineering Science Chung Hua University Hsinchu Taiwan Bachelor Program in Industrial Artificial Intelligence Ming Chi University of Technology New Taipei City Taiwan Department of Computer Science and Information Engineering Chung Hua University Hsinchu Taiwan

ISBN: (数字)9798350386844

ISBN: (纸本)9798350386851

The study explores various 2D feature representations including spectrogram, MFCC spectrogram, log Mel-spectrogram, and the perceptual weighted log Mel-spectrogram (PW-LMSP) for acoustic scene classification (ASC). These 2D feature representations were classified using a bottom-up broadcast neural network (BBNN). The experimental results have shown that PW-LMSP outperforms other 2D representations. Further, the proposed method (PW-LMSP with BBNN) achieves accuracies of 91.2% and 91.6% respectively on the DCASE2018 and DCASE2019 development datasets, outperforming all the submissions in DCASE2018 and DCASE2019, as well as state-of-the-art approaches.

关键词： Scene classification Accuracy Neural networks LoRa Feature extraction Acoustics Mel frequency cepstral coefficient

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A Machine Learning Algorithm to Automate Vehicle Classification and License Plate Detection

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Wireless Communications and Mobile Computing 2022年第0期2022卷

作者： Srividhya, S.R. Kavitha, C. Lai, Wen-Cheng Mani, Vinodhini Khalaf, Osamah Ibrahim Department Of Computer Science And Engineering Sathyabama Institute Of Science And Technology Chennai India Bachelor Program In Industrial Projects National Yunlin University Of Science And Technology Douliu640301 Taiwan Department Electronic Engineering National Yunlin University Of Science And Technology Douliu640301 Taiwan Al-Nahrain University Al-Nahrain Nanorenewable Energy Research Center Baghdad Iraq

In the field of intelligent transportation systems (ITS), video surveillance is a hot research topic;this surveillance is used in a variety of applications, such as detecting the cause of an accident, tracking down a specific vehicle, and discovering routes between major locations. Object detection and shadow elimination are the main tasks in this area. Object detection in computer vision is a critical and vital part of object and scene recognition, and its applications are vast in the fields of surveillance and artificial intelligence. Additionally, other challenges arise in regard to video surveillance, including the recognition of text. Based on shadow elevation, we present in this work an inner-outer outline profile (IOOPL) algorithm for detecting the three levels of object boundaries. A system of video surveillance monitoring of traffic can be incorporated into this method. It is essential to identify the type of detected objects in intelligent transportation systems (ITS) to track safely and estimate traffic parameters correctly. This work addresses the problem of not recognizing object shadows as part of the object itself in-vehicle image segmentation. This paper proposes an approach for detecting and segmenting vehicles by eliminating their shadow counterparts using the delta learning algorithm (Widrow-Hoff learning rule), where the system is trained with various types of vehicles according to their appearance, colors, and build types. An essential aspect of the intelligent transportation system is recognizing the type of the detected object so that it can be tracked reliably and the traffic parameters can be estimated correctly. Furthermore, we propose to classify vehicles using a machine learning algorithm consisting of artificial neural networks trained using the delta learning algorithm, a high-performance machine learning algorithm, to obtain information regarding their travels. The paper also presents a method for recognizing the number plate using tex

关键词： Object detection

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Thickness, Annealing, and Surface Roughness Effect on Magnetic and Significant Properties of Co40Fe40B10Dy10 Thin Films

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Materials 2023年第17期16卷 5995页

作者： Liu, Wen-Jen Chang, Yung-Huang Chiang, Chia-Chin Chen, Yuan-Tsung Wang, Yu-Zhi Wu, Chueh-Lin Lin, Shih-Hung Ou, Sin-Liang Department of Materials Science and Engineering I-Shou University Kaohsiung84001 Taiwan Bachelor Program in Industrial Technology National Yunlin University of Science and Technology 123 University Road Section 3 Douliou64002 Taiwan Department of Mechanical Engineering National Kaohsiung University of Science and Technology Kaohsiung80778 Taiwan Graduate School of Materials Science National Yunlin University of Science and Technology 123 University Road Section 3 Douliou64002 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Douliou64002 Taiwan Bachelor Program for Design and Materials for Medical Equipment and Devices Da-Yeh University Changhua51591 Taiwan

In this study, Co40Fe40B10Dy10 thin films were deposited using a direct current (DC) magnetron sputtering technique. The films were deposited on glass substrates with thicknesses of 10, 20, 30, 40, and 50 nm, and heat-treated in a vacuum annealing furnace at 100, 200, and 300 °C. Various instruments were used to examine and analyze the effects of roughness on the magnetic, adhesive, and mechanical properties. From the low frequency alternating current magnetic susceptibility (χac) results, the optimum resonance frequency is 50 Hz, and the maximum χac value tends to increase with the increase in the thicknesses and annealing temperatures. The maximum χac value is 0.18 at a film thickness of 50 nm and an annealing temperature of 300 °C. From the four-point probe, it is found that the resistivity and sheet resistance values decrease with the increase in film deposition thicknesses and higher annealing temperatures. From the magnetic force microscopy (MFM), the stripe-like magnetic domain distribution is more obvious with the increase in annealing temperature. According to the contact angle data, at the same annealing temperature, the contact angle decreases as the thickness increases due to changes in surface morphology. The maximal surface energy value at 300 °C is 34.71 mJ/mm2. The transmittance decreases with increasing film thickness, while the absorption intensity is inversely proportional to the transmittance, implying that the thickness effect suppresses the photon signal. Smoother roughness has less domain pinning, more carrier conductivity, and less light scattering, resulting in superior magnetic, electrical, adhesive, and optical performance. © 2023 by the authors.

关键词： Thin films

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The Traceability Designing of Information Flow Data System in Rail Freight Transportation in Thailand

The Traceability Designing of Information Flow Data System i...

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IEEE International Conference on industrial Engineering and Engineering Management

作者： Nattakit Yuduang Yogi Tri Prasetyo Rachkanok Sukhavalli Michael Nayat Young Department of Supply Chain Faculty of Business Administration Suvarnabhumi Institute of Technology Samut Prakan Thailand International Bachelor Program in Engineering Yuan Ze University Chung-Li Taiwan Department of Industrial Engineering and Management Yuan Ze University Chung-Li Taiwan School of Industrial Engineering and Engineering Management Mapua University Manila Philippines

Rail freight transportation is one of the essential modes of freight transport. It is regarded as a cheap means of transportation and is appropriate for moving containers, agricultural items, and bulk materials. However, for a number of reasons, rail freight transit in Thailand has been constrained. One of the most worrisome issues from the perspective of the clients is the ability to track and trace the shipments. Due to the lack of efficient information flow among all parties involved in transportation, customers are unable to track down shipments and determine when they will arrive at their destination. This study used information flow diagrams to show where the information was lacking. As a case study, the State Railway of Thailand (SRT) practice is utilized to analyze the issues and make improvement recommendations. Finally, in order to enhance the information flow for rail freight transportation, a traceability system for rail freight has been developed.

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Sizing the navy's strategic reserve of ozone-depleting substances

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NAVAL ENGINEERS JOURNAL 2000年第6期112卷 17-25页

作者： Breslin, DA Smith, DE Toms, GS [?]1David A. Breslin P.E. is the Director of Technical Operations for the Naval Surface Warfare Center and is the Chairperson of ASNE'S Committee on Environmental Engineering. He received a master of science degree in aerospace engineering from Virginia Polytechnic Institute (VPI) a master of engineering administration degree in industrial and systems engineering from VPI and a bachelor of engineering degree in mechanical engineering from Stevens Institute of Technology. From 1993 to 1997 he was the program manager of the Naval Sea Systems Command'S CFC & Halon Elimination Program and played a critical role in establishing the Navy'S strategic reserve of ozone-depleting substances. Because of his many efforts he received a Stratospheric Ozone Protection Award in 1995 from the U.S. Environmental Protection Agency in recognition of “exceptional contributions to global environmental protection”.

The domestic production of the most powerful Ozone-Depleting Substances (ODSs) has permanently ceased and the abundant supplies of a number of refrigerants, fire-fighting agents, and solvents, once taken for granted, are now a thing of the past. ne Navy has adopted a successful strategy for addressing the threat posed by the unavailability of ODSs. That strategy includes relying on a strategic reserve of ODSs. Considering that the strategic reserve will play a critical role in sustained fleet operations well into the next century, it is important to record the history of the reserve and to document lessons learned in order to educate future generations that may be faced with similar challenges. This is the second of three papers that will cover all aspects of the Navy's strategic reserve of ODSs. The first paper documented the history of the Navy's effort to size, establish, and monitor a reserve designed to support fleet operations until-the middle of the next century (1). This paper addresses in detail the process used to estimate the required size of the reserve, including the survey method, statistical analyses, and sizing algorithms. The third paper will discuss the development of the plan for monitoring the reserve including the control mechanisms, regression methods, and statistical-process-control techniques (2).

关键词： Survey Methodology Fleet management Refrigerants Ozone depleting substances strategic reserves

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Application of nanocatalyst iron oxide (Fe2O3) to reduce exhaust emissions (CO and HC) 1

Application of nanocatalyst iron oxide (Fe2O3) to reduce exh...

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1st Materials Research Society-Indonesia Conference and Congress 2017, MRS-INA C and C 2017

作者： Puspitasari, P. Yazirin, C. Bachtiar, L.A. Dika, J.W. Zaharis, S.M.S.N.S. Mechanical Engineering Department Engineering Faculty Malang State University Semarang street 5 East-Java-Malang Indonesia Center of Nano Research and Advanced Materials Malang State University Semarang street 5 East-Java-Malang Indonesia Master Program of Mechanical Engineering Engineering Faculty Malang State University Semarang street 5 East-Java-Malang Indonesia Bachelor Program Mechanical Engineering Department Malang State University Semarang street 5 East-Java-Malang Indonesia Industrial Chemical Technology Programme Faculty of Science and Technology Universiti Sains Islam Malaysia Bandar Baru Nilai Negeri Sembilan Nilai71800 Malaysia

Fe2O3 has been the interest of many studies due to its applications in various scientific and industrial fields including in environment, corrosion, soil science, and exhaust emissions. Fe2O3 is a chemical mixture that can be applied as a catalyst to reduce exhaust emissions because it is capable of binding CO and HC contained in motorcycle exhaust gases The growth of motor vehicles results in air pollution and an increase in exhaust emissions consisting of 70.50% CO and 18.34% HC. One effort to reduce exhaust emission levels is by applying a catalytic converter to the exhaust system. This research was an experimental research aiming to investigate the difference in emission level of CO and HC between a motorcycle with and without a catalytic converter. The types of fuel used were RON 88, RON 90, RON 92, and RON 98. The results showed that the application of Fe2O3 as a catalyst could reduce the level of CO significantly in RON 88, i.e. 91.43% CO, and the level of HC in RON 88 and RON 92, i.e. 53.27% and 91.07% HC respectively. © Published under licence by IOP Publishing Ltd.

关键词： Catalytic converters

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An adaptive replica configuration mechanism based on predictive file popularity and queue balance in mobile edge computing environment

Research Square

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Research Square 2021年

作者： Chiang, Mao-Lun Hsieh, Hui-Ching Chang, Ting-Yi Lin, Wei-Ling Chen, Hong-Wei Department of Bachelor Degree Program of Artificial Intelligence National Taichung University of Science and Technology Taiwan Department of New Media Communication Hsing Wu University New Taipei City Taiwan Department of Industrial Education and Technology National Changhua University of Education Changhua City Taiwan Department of Information Management Chaoyang University of Technology Taichung City Taiwan

In the current era of the Internet of Things (IoT), various devices can provide more services by connecting to the Internet. However, the explosive growth of connected devices will cause the cloud core overload and significant network delays. To overcome these problems, the Mobile Edge Computing (MEC) network is proposed to provide most of the computing and storage near the radio access network to reduce the traffic of the core cloud network and provide lower latency for the terminal. Mobile edge computing can work with third parties to develop multiple services, such as mobile big data analysis and context-aware services. However, when there is a large amount of popular data accessed in a short period, the system must generate many replicas, which will not only reduce access efficiency but also cause additional traffic overhead. To improve the above problems, an Adaptive Replica Configuration Mechanism (ARCM) is proposed in this paper to predict the popularity of the file and make a replica to the low-blocking node. This method spreads the subsequent access workload by copying the popular file in advance to improve the overall performance of the system. © 2021, CC BY.

关键词： Mobile edge computing

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