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IEEE MTT-S International Microwave and RF Conference

作者： Wen-Cheng Lai 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.

ISBN: (纸本)9781665458764

This article introduces RF wireless integrated transmitter for 5.8GHz communication and RFID applications. The proposed wireless integrated transmitter consists of two-stage class A CMOS power amplifier (PA) with bandgap voltage reference (BGR) bias, pre-distorter, folded-cascode mixer with balun, differential cross-coupled Colpitts quadrature voltage-controlled oscillator (QVCO), band-pass Gm-C filter and antenna design. The presented PA design presents input/ output return loss of 14dB/23dB, conversion gain of 15.5dB, the output 1-dB compression point (OP 1dB) of 16.5dBm, two tone test / output 3 rd order intercept point (OIP3) of 25.8dBm and power added efficiency (PAE) higher than 23%, respectively. The implemented integrated transmitter using 0.18um CMOS technology with antenna has experimental at anechoic chamber.

关键词： Band-pass filters Wireless communication Radio frequency Voltage-controlled oscillators Transmitting antennas Power amplifiers Voltage

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Millimeter Wave Receiver Of Radar And Lidar Detection With Deep Neural Network For Edge Electromobility

Millimeter Wave Receiver Of Radar And Lidar Detection With D...

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International Microsystems, Packaging, Assembly and Circuits technology (IMPACT)

作者： Wen-Cheng Lai 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.

ISBN: (纸本)9781665431927

This article proposed integrated millimeter wave receiver with hybrid beamforming of radar detection with deep learning, high performance, and low power dissipation. The microsystem also designs lidar detection to upgrade accuracy on embedded electromobility. The traditional pedestrian detection system (PDS) on embedded platform introduced as edge computing vision for advanced driver assistance systems (ADAS). The millimeter wave receiver promoted to reduce image computation with featured object and enhance throughput with parallel processing on deep convolutional layers of ARM Neon to comparison with produce MobileNet and training of others neural network.

关键词： Micromechanical devices Deep learning Training Laser radar Neural networks Radar detection Receivers

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Millimetre Wave Receiver for Radar Detection with Vision and Optical Fusion

Millimetre Wave Receiver for Radar Detection with Vision and...

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International Conference on Engineering and Emerging Technologies (ICEET)

作者： Wen-Cheng Lai 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.

ISBN: (纸本)9781665427159

The embedded platform of vehicle introduced as edge computing vision and deep learning for advanced driver assistance systems (ADAS). The proposed phase locked loop design of millimeter wave receiver consists of phase frequency detector with charge pump, loop filter and injection locked frequency divider for radar detection. In terms of receiving data, this article uses the array headlamp module as the optical fusion, the millimeter wave receiver module as the distance experiments source, and then compile C++ with NVIDIA Jetson Nano for image lane analysis, while MobileNet uses the Yolov3-tiny algorithm for image object detection.

关键词： Optical filters Integrated optics Laser radar Radar detection Optical imaging Optical receivers Optical pumping

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A Continuous-Time Quadrature Bandpass Sigma-Delta Modulator with Capacitive Feedforward Chip Design for Phase Locked Loop Controllers

A Continuous-Time Quadrature Bandpass Sigma-Delta Modulator ...

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International Conference on Electrical, Control and Instrumentation Engineering (ICECIE)

作者： Wen-Cheng Lai 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

ISBN: (纸本)9781665449670

A continuous-time quadrature bandpass sigma-delta (ΣΔ) modulator consisting of a chain of integrators with weighted capacitive feedforward summation (CICFF) topology is presented for LTE-A wireless controllers. The main advantage of the proposed modulator adopts the weighted capacitor technology to save a feedforward summation amplifier, hence reduces power consumption from QVCO. The phase locked loop was implemented in tsmc 0.18 μm CMOS process. With 1.8 V supply voltage and 160 M-samples/s and - 1.0 dBm 1 MHz sinusoid, measured results have achieved a dynamic range of 56 dB, a peak SNDR of 52.8 dB, a SFDR of 59 dB, an ENOB of 8.49-bit over 2.5 MHz signal bandwidth and a power dissipation of 18.5 mW. Including pads, the chip area is 1.3×1.5 mm 2 .

关键词： Wireless communication Sigma-delta modulation Voltage measurement Power demand Phase modulation Modulation Dynamic range

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Investigation of Sm Addition on Microstructural and Optical Properties of CoFe Thin Films

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Materials 2023年第15期16卷 5380-5380页

作者： Liu, Wen-Jen Chang, Yung-Huang Chiang, Chia-Chin Lai, Jian-Xin Chen, Yuan-Tsung Chen, Hsiung-Liang Lin, Shih-Hung Department of Materials Science and Engineering I-Shou University Kaohsiung840 Taiwan Bachelor Program in Industrial Technology National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan Department of Mechanical Engineering National Kaohsiung University of Science and Technology Kaohsiung City80778 Taiwan Graduate School of Materials Science National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan

CoFe-based alloys and rare earth (RE) elements are among the most studied materials in applying magnetic devices to improve soft magnetic characteristics. A series of Co40Fe40Sm20 films are deposited on a glass substrate via the sputtering technique, followed by an annealing process to investigate their effect on microstructural and optical properties of Co40Fe40Sm20 films. In this study, the increase in the thickness of Co40Fe40Sm20 films and annealing temperatures resulted in a smoother surface morphology. The 40 nm Co40Fe40Sm20 films annealed 300 °C are expected to have good wear resistance and adhesive properties due to their high values of H/E ratio and surface energy. Optical transparency also increased due to the smoother surface of the Co40Fe40Sm20 films. © 2023 by the authors.

关键词： Iron alloys

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Directions of the 100 most cited chatbot-related human behavior research: A review of academic publications

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Computers and Education: Artificial Intelligence 2021年 2卷

作者： Wang, Jingyun Hwang, Gwo-Haur Chang, Ching-Yi Department of Computer Science Durham University United Kingdom Bachelor Program in Industrial Technology National Yunlin University of Science and Technology Taiwan School of Nursing College of Nursing Taipei Medical University 250 Wuxing Street Taipei11031 Taiwan

Chatbots are becoming a common trend in the service industry, education, and daily life. Increasing evidence has shown that chatbots have the potential to change the way people learn and search for information in human behavior. However, a systematic review of chatbot-related human behavior research with high citation rates has not been performed. Papers with high citation rates represent the latest changes in a particular research field, and reflect the current issues or research trends. By reading highly cited papers, researchers can identify important research questions. Therefore, this article presents a systematic literature review exploring the latest changes in chatbot research, and reviews the top 100 highly cited articles. The review shows that the highly cited chatbot-related studies have proposed new conversation strategies and compared different modes of human–human online conversations and human–chatbot conversations to find more effective methods of online communication. In addition, existing research has focused on high-level statistical performance and system development and testing. The findings also show that chatbots have started to be applied to the field of education, and there is much potential for the use of chatbots to improve the learning process and learning outcomes. © 2021 The Authors

关键词： Computer aided instruction

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Antibacterial and Photocatalytic Dye Degradation Activities of Green Synthesized NiSe Nanoparticles from Hibiscus rosa-sinensis Leaf Extract

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Water (Switzerland) 2023年第7期15卷 1380页

作者： Velayutham, Lakshmi Parvathiraja, C. Anitha, Dhivya Christo Mahalakshmi, K. Jenila, Mary Gupta, Jeetendra Kumar Wabaidur, Saikh Mohammad Siddiqui, Masoom Raza Aftab, Sikandar Lai, Wen-Cheng Palayamkottai Manonmaniam Sundaranar University Tamilnadu Tirunelveli627012 India Department of Physics Manonmaniam Sundaranar University Tamilnadu Tirunelveli627012 India Chemistry Department College of Science King Saud University Riyadh11451 Saudi Arabia Department of Intelligent Mechatronics Engineering Sejong University 209 Neungdong-ro Gwangjin-gu Seoul05006 Korea Republic of Bachelor Program in Industrial Projects National Yunlin University of Science and Technology Douliu640301 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology Douliu640301 Taiwan

Ecosystems worldwide face a serious and life-threatening water crisis due to water contamination. Nanotechnology offers a promising solution to this issue by providing methods for removing pollutants from aquatic sources. In this study, we utilized a green and simple approach to biosynthesize NiSe NPs using Hibiscus rosa-sinensis extract as the bio-source. The plant extract acts as a reducing, stabilizing, and capping agent in the synthesis process. A simple hydrothermal method was employed to blend the NiSe NPs photocatalysts. UV-Visible DRS spectroscopy was utilized to confirm the reduction in and stabilization of Ni2+ and Se2− ions. The resulting NiSe NPs have a bandgap of 1.74 eV, which facilitates electron and hole production on their surfaces. To characterize the functional groups on the NiSe NPs and their surface interactions with bio-compounds, FTIR spectroscopy was utilized. XRD analysis revealed the crystallite size of the NiSe NPs to be 24 nm, while FE-SEM and TEM imaging showed their spherical shape and material distribution. EDX spectroscopy confirmed the integrity of the NiSe NPs’ material. XPS analysis provided information on the chemical composition, nickel and selenium valency, and their interface. The efficacy of the NiSe NPs as a blended photocatalyst in photodegrading Methylene Blue (MB) dye was tested under visible light, resulting in 92% degradation. Furthermore, the NiSe NPs exhibited bactericidal activity against Escherichia coli and Staphylococcus aureus bacteria due to their advanced oxidation and reduction in charge particles, which increased the degradation efficiency and suppressed cell proliferation. Based on the obtained findings, the NiSe NPs show promise as a powerful agent for water remediation and microbial resistance. © 2023 by the authors.

关键词： Degradation

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Surface Roughness-Induced Changes in Important Physical Features of CoFeSm Thin Films on Glass Substrates during Annealing

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Materials 2023年第21期16卷 6989-6989页

作者： Fern, Chi-Lon Liu, Wen-Jen Chang, Yung-Huang Chiang, Chia-Chin Chen, Yuan-Tsung Lu, Pei-Xin Su, Xuan-Ming Lin, Shih-Hung Lin, Ko-Wei Department of Materials Science and Engineering National Chung Hsing University Taichung40227 Taiwan 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 Yunlin 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 Yunlin Douliou64002 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou64002 Taiwan

Co60Fe20Sm20 thin films were deposited onto glass substrates in a high vacuum setting. The films varied in thickness from 10 to 50 nm and underwent annealing processes at different temperatures: room temperature (RT), 100, 200, and 300 °C. Our analysis encompassed structural, magnetic, electrical, nanomechanical, adhesive, and optical properties in relation to film thickness and annealing temperature. X-ray diffraction (XRD) analysis did not reveal characteristic peaks in Co60Fe20Sm20 thin films due to insufficient growth-driving forces. Electrical measurements indicated reduced resistivity and sheet resistance with increasing film thickness and higher annealing temperatures, owing to hindered current-carrier transport resulting from the amorphous structure. Atomic force microscope (AFM) analysis showed a decrease in surface roughness with increased thickness and annealing temperature. The low-frequency alternating current magnetic susceptibility (χac) values increased with film thickness and annealing temperature. Nanoindentation analysis demonstrated reduced film hardness and Young’s modulus with thicker films. Contact angle measurements suggested a hydrophilic film. Surface energy increased with greater film thickness, particularly in annealed films, indicating a decrease in contact angle contributing to this increase. Transmittance measurements have revealed intensified absorption and reduced transmittance with thicker films. In summary, the surface roughness of CoFeSm films at different annealing temperatures significantly influenced their magnetic, electrical, adhesive, and optical properties. A smoother surface reduced the pinning effect on the domain walls, enhancing the χac value. Additionally, diminished surface roughness led to a lower contact angle and higher surface energy. Additionally, smoother surfaces exhibited higher carrier conductivity, resulting in reduced electrical resistance. The optical transparency decreased due to the smoother surface of C

关键词： Thin films

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Perceived Risk and Reward Factors on Residential Solar Pv Adoption in the Philippines an Integration of Utaut, Tpb and Tam

SSRN

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SSRN 2024年

作者： Ragragio, Titus James Reynon Borres, Rianina D. Persada, Satria Fadil Young, Michael Nayat Ong, Ardvin Kester S. Prasetyo, Yogi Tri Nadlifatin, Reny Zulvia, Ferani Eva School of Industrial Engineering and Engineering Management Mapua University 658 Muralla St. Intramuros Manila1002 Philippines Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Malang65154 Indonesia International Bachelor Program in Engineering Yuan Ze University 135 Yuan-Tung Road Chung-Li32003 Taiwan Department of Industrial Engineering and Management Yuan Ze University 135 Yuan-Tung Road Chung-Li32003 Taiwan Department of Information Systems Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya60111 Indonesia National Taiwan University of Science and Technology No.43 Keelung Rd. Sec.4 Da'an Dist. Taipei City106335 Taiwan

This study delves into the perception of homeowners in the Philippines regarding the utilization of Residential Rooftop Solar Photovoltaic Systems (RSPVS), focusing on their intention to adopt this renewable energy technology. The research is driven by the advantageous conditions in the Philippines, including high irradiance levels, supportive solar PV policies, and decreasing system costs. Understanding prosumers' (producers and consumers) perspectives is crucial to accelerating the adoption of RSPVS, which can significantly contribute to decentralizing and greening the electrical production landscape in the country. Building on previous studies, which highlight a keen interest in solar technology among homeowners but cite high installation costs and a lack of understanding as major barriers, this research aims to shed light on the factors influencing prosumers' intentions to use RSPVS. Employing a theoretical framework combining the technology Acceptance Model (TAM), Theory of Planned Behavior (TPB), Unified Theory of Acceptance and Use of technology (UTAUT), and integrating Technophilia and Perceived Risk as supplementary constructs, this study seeks to uncover the drivers and inhibitors of RSPVS adoption. The study employs an online questionnaire distributed in key cities where Residential RSPVS is available, with a sample size of 239 respondents. The data collected are analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM) to examine the relationships between variables and to test the hypothesized model. The results indicate that factors such as Technophilia, Price Value, and Social Influence are significant determinants of prosumers' intent to adopt RSPVS. Notably, Technophilia, reflecting enthusiasm for new technology, emerged as a key factor, suggesting that prosumers are motivated by the allure of solar energy. Additionally, the study found that Perceived Risk was not a significant inhibitor, indicating a high level of confidence and tr

关键词： Solar energy

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Chip Sigma-Delta Modulator with Frequency Synthesizers for Phase-Locked Loop Control

Chip Sigma-Delta Modulator with Frequency Synthesizers for P...

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International Conference on Computing, Communication & Automation (ICCCA)

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)9781665447539

The article presents phase - locked loop consists of frequency synthesizers and multi-bands low-pass continuous-time $\Sigma-\Delta$ modulators. The promoted sigma - delta $(\Sigma-\Delta)$ modulators with cascaded integrator and frequency synthesizers are presented for phase locked loop controller. The promoted integration of phase - locked loop was implemented in tsmc 0.18 μm CMOS process. Experimental has achieved the SNDR of 42/ 33 dB over half MHz, phase noise of voltage-controlled oscillator (VCO) produces -120.08 dBc/Hz at 1MHz offset, and phase noise of PLL produces - 113.2 dBc/Hz at 1MHz offset, respectively. This dual-bands phase-locked loop (PLL) are carefully integrated for low dissipation sensor control applications.

关键词： Phase noise Frequency synthesizers Sigma-delta modulation Frequency modulation Phase measurement Phase modulation Voltage-controlled oscillators

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