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Boost dC-dC Converter with Non-dissipative Snubber

IEEJ Transactions on Electrical and Electronic engineering 2024年第11期19卷 1858-1878页

作者： Yau, Yeu-Torng Department of Ph.D. Program Prospective Technology of Electrical Engineering and Computer Science National Chin-Yi University of Technology Taichung No.57 Sec. 2 Zhongshan Rd. Taiping Dist Taichung41170 Taiwan

To provide a hold-up time function in dC-dC supplies for cell site stations or data centers, using a boost converter with a bulk output capacitor as a front-end converter stage is a simple and highly cost-effective solution. However, conventional boost converters with a hard-switching operation result in low conversion efficiency and increased electromagnetic interference emissions. In this paper, a boost converter with a new non-dissipative snubber is proposed that only requires two additional diodes, an inductor, and a multilayer ceramic capacitor. The main feature of the proposed snubber is that the components are not located on the main power processing path. This means they only require low ratings, improving cost-effectiveness. A prototype converter is analyzed, realized, and applied to a 300 W redundant dC-dC power supply module for a 5G cell base station. © 2024 The Author(s). IEEJ Transactions on Electrical and Electronic engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC. © 2024 The Author(s). IEEJ Transactions on Electrical and Electronic engineering published by Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.

关键词： Boost converter

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable development Goal (SdG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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Corrected Formula of Bed Resistance Coefficient for Plane Numerical Simulation of Tidal Current

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China Ocean engineering 2000年第2期15卷 221-227页

作者：宋志尧刘一凡 Ph. D.， Senior Engineer， College of Harbor， Waterway and Coastal Engineering， Hohai University， Nanjing 210098P. R. China Senior Engineer， Department of Computer Science and Technology， Nanjing University of Post and Telecommunication， Nanjing 210003， P. R. China

By means of a logarithm law for the velocity profile, a corrected formula of bed resistance coefficient, which involves many factors such as gradient of still water depth, variation of surface elevation, flow direction, and so on, is derived from the 3d governing equations of tidal current by averaging over the whole water depth. Theoretical analysis and application have shown that the 2d plane tidal current numerical model would be more reasonable and could be applied to steep bottom topograph. when the corrected bed resistance coefficient is used, therefore the results of reproduction simulation and engineering calculation would be more scientific and reasonable.

关键词： tidal current bed resistance coefficient numerical simulation corrected formula

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Analysis of dynamic systems with various friction laws

Analysis of dynamic systems with various friction laws

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作者： Awrejcewicz, J. Olejnik, P. Department of Automatics and Biomechanics Technical University of Lodz Lodz Poland Department of Automatics and Biomechanics Ph. D. School in Mechanics Committee for Science Faculty of Mechanical Engineering Technical University of Lodz Erasmus-Socrates Program Faculty of Mechanical Engineering

This survey is devoted to the significant role of various dry friction laws in engineering sciences. Both advantages and disadvantages of a frictional process are illustrated and discussed, but excluding the nature of friction. It is shown how the classical friction laws and modern friction theories exist in today's pure and applied sciences. Static and dynamic friction models are described. An important role of purely theoretical and experimental investigations in developing the appropriate friction models is outlined, placing an emph.sis on new approaches (models proposed by Bay-Wanheim, dahl, Bliman-Sorine, Lund-Grenoble, as well as atomic scale and fractal models, among others). Friction treated as a complex process being in interaction with wear, heat emission, and deformation is also discussed. Then the impact of dry friction models on current dynamical systems theory is reviewed. Finally, an application of friction to model a brake mechanism as a mechanical system with two degrees-of-freedom, including experimental and numerical analyses, is given. This review paper contains 254 references. Copyright © 2005 by ASME.

关键词： Friction

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Electrochemical sensor based on ZnO@MWCNT/ glassy carbon electrode for the detection of warfarin (blood anticoagulant)

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Surfaces and Interfaces 2025年 67卷

作者： Manjunath, Kumbar Mudakappa Yemmi, Rajeshwari Swamy, B.E. Kumara Eldesoky, Gaber E. Govindasamy, Mani Division of Plant Breeding and Genetics Central Coffee Research Institute Karnataka Chikkamagaluru 577117 India Department of Industrial Chemistry Kuvempu University Karnataka Shivamogga India Department of Chemistry College of Science King Saud University P. O. Box 2455 Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Centre for Applied Research Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Tamil Nadu Chennai 602105 India Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry Korea University Seoul Seongbuk-gu South Korea

This study employed ZnO nanoparticles, multi-walled carbon nanotubes (MWCNTs), and a modified glassy carbon electrode (GCE) as a quick and sensitive method for detecting warfarin at biological ph.levels. The ultrasonication technique was utilized in the synthesis of the ZnO@MWCNTs nanocomposite. The ZnO@MWCNTs were characterized using Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRd), spectroscopy, analytical techniques, and electrochemical impedance spectroscopy (EIS). Cyclic voltammetry (CV) as well as differential pulse voltammetry (dPV) techniques are employed in the presence of PBS buffer as an electrolyte. We observed unique oxidative peak currents an indication of the electrochemical mechanism of warfarin at low potentials for ZnO @MWCNTs/GCE. Moreover, we successfully attained effective electrochemical detection of warfarin utilizing the proposed sensor, which exhibited an excellent low limit of detection (LOd) of 0.0188 μM across a linear range of 0.02–2867.37 μM. The proposed sensor exhibits excellent storage stability, repeatability, and reproducibility, and has been effectively utilized for the quantification of warfarin in real samples, including blood serum and urine as obtained good recovery and RSd value. © 2025 Elsevier B.V.

关键词： differential pulse voltammetry Glassy carbon electrode Multiwalled carbon nanotubes Warfarin ZnO nanoparticles

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dual modifications of sensitizers and lanthanide ions on a two-dimensional zirconium-based metal-organic framework for ph.toluminescent detection

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CrystEngComm 2024年第22期26卷 2852-2861页

作者： Chang, Jhe-Wei Lin, Tzu-Chi Chen, You-Liang Han, Po-Chun Yang, Shang-Cheng Tsai, Meng-dian Wu, Kevin C.-W. Kung, Chung-Wei Department of Chemical Engineering National Cheng Kung University Tainan City70101 Taiwan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Ph. D. Program of Green Materials and Precision Devices College of Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan320 Taiwan

A two-dimensional (2d) zirconium-based metal-organic framework (Zr-MOF) with abundant terminal -OH/-OH2 groups on its nodes, ZrBTB (BTB = 1,3,5-tris(4-carboxyph.nyl)benzene), is utilized as a platform for dual post-synthetic modifications (PSM) to immobilize both the benzoph.none-based ph.tosensitizer (benzoph.none-4,4′-dicarboxylate, bzpdc) and terbium ions onto the 2d Zr-MOF molecular sheets. Terbium ions are installed on the 2d Zr-MOF at various temperatures to adjust the loading of terbium ions on the 2d Zr-MOF while preserving the loading of the ph.tosensitizer. The crystallinity, morph.logy, porosity, and loadings of both bzpdc ligands and terbium ions are characterized for each material, and the coordinating locations of terbium ions in the Zr-MOF structure are investigated. The ph.toluminescence (PL) properties of these materials are then examined. Since the installed bzpdc ligand can induce a highly efficient energy transfer to the neighbouring terbium ion upon excitation, the obtained material after dual PSM (ZrBTB-bzpdc-Tb-120) can show strong PL emissions of terbium ions upon the excitation of the bzpdc ligand at 355 nm, with a PL quantum yield of 5.04%. It is more advantageous than the 2d Zr-MOF solely functionalized with terbium ions, which can only exhibit similar emissions upon the excitation of the BTB linker at a less friendly wavelength of 310 nm, with a lower PL quantum yield of 2.94%. Owing to the high chemical stability as well as good dispersity of the luminescent ZrBTB-bzpdc-Tb-120 in water, its performances in selective PL sensing of Fe(iii) ions present in aqueous solutions are investigated. © 2024 The Royal Society of Chemistry.

关键词： Carboxylation

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Characterization of Bacterial Strains Isolated from Wastewater Polluted Soil for Synthetic dye decolorization Attributes

Characterization of Bacterial Strains Isolated from Wastewat...

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2021 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2021

作者： Ahsan, Wazir Aitizaz Lin, Chitsan National Kaohsiung University of Science and Technology Ph.D. Program In College of Hydrosphere Kaohsiung Taiwan National Kaohsiung University of Science and Technology Department of Marine Environmental Engineering Kaohsiung Taiwan

ISBN: (纸本)9781665419512

Soil is a renewable and valuable medium for variety of life. In Pakistan, factory effluents and domestic wastewater is generally not recycled and it contaminates the agricultural soils adjacent to nearby drains. Five screened isolates were subjected to azo dye decolorization (Reactive Black, Red Reactive, Blue direct, Congo Red direct) in the presence of NaCl, at variable ph.levels and at different carbon sources. Isolate Sr-7, Ss-2-1 showed best decolorization ability in terms of all the azo dyes studied. Similarly, isolates Sr-2-1/1 and Mr-1/1 exhibited maximum ph.sph.te solubilization and IAA production potential. The screened isolates can be used as inoculants to increase crop productivity in problem soils and can also be applied in wastewater treatments processes. © 2021 IEEE.

关键词： Azo dyes

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Strategy of converting Jiangsu Province A Foreign-trade Large Province into A Foreign-trade Strong Province

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China's Foreign Trade 2005年第21期 26-29页

作者： Cao Yang Yao Hongbing Ph.D. candidate of Nanjing University of Science ＆ Technology majoring in management engineering Ph. D. now a lecturer of School of Mechanical Engineering in Jiangsu University

Jiangsu Province, after executing economic inter- nationalization strategy and establishing the strategic goal of foreign-trade strong province,meaning to pur- sue a dominating position in the foreign trade relations, has become one of the foreign-trade large provinces of China and provided considerable international com- petitive power in some important fields. The period of the first twenty years of this century will be the impor- tant strategic favorable opportunity period for Chinese development. The external motive force of our coun- try for the economic development will not weaken greatly. The economic society of Jiangsu Province will walk into the industrialization type-transforming period, urbanization acceleration period, internation- alization advancement period, market consummation period and information penetration period. In order to promote Jiangsu Province converting from a foreign- trade large province into a foreign-trade strong province, Jiangsu should command the foreign-trade affairs through the scientific evolution concept, man- age the relation between the opening to the outside world and the domestic development, comply with the economy globalization, propel the internationalization of production, industry, capital and talents, improve the hierarchy of opening to the outside world, and quicken the internationalization progress. Also, Jiangsu province should maintain the steady continuous for- eign-trade growth, change the foreign-trade growth mode, modify the imports and exports merchandise composition and establish the marketing system to the international market. Furthermore, under the condition of moderate growth of general quantity of foreign trade, Jiangsu Province should advance and modify the im- ports and exports merchandise composition, improve the technology and value-added content of the export production, create the independent trademarks of the export production, foster the leading companies hav- ing the independent development ab

关键词：江苏对外贸易外贸强省战略电机产品高新技术产品服务贸易

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Humming-to-Instrument Conversion based on CycleGAN

Humming-to-Instrument Conversion based on CycleGAN

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2021 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2021

作者： Lai, Wen-Hsing Wang, Siou-Lin Xu, Zhi-Yao National Kaohsiung University of Science and Technology Dept. of Computer and Communication Engineering Kaohsiung Taiwan National Kaohsiung University of Science and Technology Ph.D. Program In Engineering Science and Technology College of Engineering Kaohsiung Taiwan

ISBN: (纸本)9781665419512

In this research, we propose a humming-to-instrument conversion system based on cycle-consistent adversarial networks (CycleGAN) to convert human humming to the sound of viola. This research adjusts the weight of cycle-consistency loss and identity loss to successfully convert the sound. From the experimental results of objective RMSE, the converted audio is more similar to viola compared to the similarity to humming. From the results of subjective MOS, the quality of the converted sound is fair to listeners. © 2021 IEEE.

关键词： Communication systems Signal processing

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Flexible nanohybrid substrates utilizing gold nanocubes/nano mica platelets with 3d lightning-rod effect for highly efficient bacterial biosensors based on surface-enhanced Raman scattering

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Journal of Materials Chemistry B 2024年第13期12卷 3226-3239页

作者： Chen, Yan-Feng Lu, Ming-Chang Lee, Chia-Jung Chiu, Chih-Wei Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Ph.D. Program in Clinical Drug Development of Herbal Medicine College of Pharmacy Taipei Medical University Taipei11031 Taiwan

In this study, gold nanocubes (AuNCs) were quickly synthesized using the seed-mediated growth method and reduced onto the surface of two-dimensional (2d) delaminated nano mica platelets (NMPs), enabling the development of AuNCs/NMPs nanohybrids with a 3d lightning-rod effect. First, the growth-solution amount can be changed to easily adjust the AuNCs average-particle size within a range of 30-70 nm. The use of the cationic surfactant cetyltrimethylammonium chloride as a protective agent allowed the surface of AuNCs and nanohybrids to be positively charged. Positively charged nanohybrid surfaces presented a good adsorption effect for detecting molecules with negative charges on the surface. Additionally, the NMP surfaces were rich in ionic charges and provided a large specific surface area for stabilizing the growth of AuNCs. delaminated AuNCs/NMPs nanohybrids can generate a 3d hotspot effect through self-assembly to enhance the Raman signal. Surface-enhanced Raman scattering (SERS) is highly sensitive in detecting adenine biomolecules. Its limit of detection (LOd) and Raman enhancement factor reached 10−9 M and 3.6 × 108, respectively. Excellent reproducibility was obtained owing to the relatively regular arrangement of AuNC particles, and the relative standard deviation (RSd) was 10.7%. Finally, the surface of NMPs was modified by adding the hydroph.lic poly(oxyethylene)-diamine (POE2000) and amph.ph.lic PIB-POE-PIB copolymer at different weight ratios. The adjustment of the surface hydroph.licity and hydroph.bicity of AuNCs/NMPs nanohybrids led to better adsorption and selectivity for bacteria. AuNCs/POE/NMPs and AuNCs/PIB-POE-PIB/NMPs were further applied to the SERS detection of hydroph.lic Staph.lococcus aureus and hydroph.bic Escherichia coli, respectively. The SERS-detection results suggest that the LOd of hydroph.lic Staph.lococcus aureus and hydroph.bic Escherichia coli reached 92 CFU mL−1 and 1.6 × 102 CFU mL−1, respectively. The AuNCs/POE/NMPs and AuNCs/P

关键词： Substrates

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