Hung-Yu Wang

Hung-Yu Wang

National Kaohsiung University of Science and Technology
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Hung-Yu Wang has a total of 96 co-authors. Here are the top co-authors by number of shared publications:

Latest Publications

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    Synthesis of Configurable Voltage-Mode Biquads via Augmented NAM Expansion and Symbolic Mapping

    by Hung-Cuong Thai, Ta-Chi Jeang, Dedi Kurniadi, Sujito, Hung-Yu Wang

    A systematic synthesis framework based on augmented nodal admittance matrix expansion and symbolic mapping for configurable voltage-mode biquadratic filters that guarantee orthogonal control over the quality factor and pole frequency is presented. The methodology builds upon an established denominator polynomial to ensure high selectivity stability and easy adjustment of filter parameters. By formulating an augmented 3×3 core admittance matrix embedded with two symbolic control variables, the proposed framework can be used to derive various filtering functions by using nodal admittance matrix expansion technique. The low-pass, high-pass, band-pass, notch, and all-pass responses are systematically extracted from this single hardware core with five input and two output voltage ports. Since the pole-generating matrix core remains completely invariant, the orthogonal parameter tunability of the active network is preserved for all extracted filter types. These synthesized filter functions are realized with current conveyors and the non-ideality of active devices is explored. The workability of the obtained multiple-input multiple-output filter is verified through HSPICE simulations using TSMC 0.18 μm CMOS technology, demonstrating the feasibility of the proposed method.

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    Special Issue “Physics and Mechanics of New Materials and Their Applications 2021”

    by Ivan A. Parinov, Shun-Hsyung Chang, Hung-Yu Wang

    Material science, aimed at designing, fabricating, investigating, and using advanced materials and composites in different fields, is the one of the most rapidly developing directions in science, technologies, and techniques

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    Special Issue “Physics and Mechanics of New Materials and Their Applications 2019”

    by Ivan A. Parinov, Banh Tien Long, Shun-Hsyung Chang, Hung-Yu Wang

    Advanced materials and composites can be applied in a number of ways not only in modern science, techniques and technologies but in everyday life, including in the fields of aviation, medicine, waste reprocessing or the study of the underwater world

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    Special Issue: “Physics and Mechanics of New Materials and Their Applications”

    by Yun-Hae Kim, Ivan A. Parinov, Shun-Hsyung Chang, Hung-Yu Wang

    Solid-state physics, directed to the design, manufacture, research, and further application of advanced materials and composites, play one of the most important roles in the quick development of modern science, techniques, and technologies

    Cited by 2
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    Reasons for the High Electrical Conductivity of Bismuth Ferrite and Ways to Minimize It

    by Konstantin P. Andryushin, Vladimir P. Sakhnenko, Anatoliy V. Turik, Lidiya A. Shilkina, Alexey A. Pavelko, Svetlana I. Dudkina, Angela G. Rudskaya, Daniil D. Rudskiy, Iliya A. Verbenko, Sidek V. Hasbulatov, et al.

    The reasons for the high electrical conductivity of bismuth ferrite due to its natural composite structure, structural non-stoichiometry, redox processes, and the boundary position in the perovskite family have been considered. It has been shown that it is possible to significantly (2–3 orders of magnitude) reduce the conductivity of BiFeO3 by introducing large-sized ions of rare-earth elements (REE: La, Pr, Nd, Sm, Eu, Gd with 0.94 ≤ R¯ ≤ 1.04 Å) in amounts of up to 10 mol %. An interpretation of the observed effects has been given. A consideration about the appropriateness of taking into account the presented results when developing devices using materials of the BiFeO3/REE type has been expressed.

    Cited by 8
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    Enhanced Pathological Element-Based Symbolic Nodal Analysis

    by Sujito, Huu-Duy Tran, Yueh-Ling Lin, Cong Chuan Pham, Hung-Yu Wang, Shun-Hsyung Chang

    An improved symbolic analysis procedure to enhance the analytic efficiency of the reported symbolic nodal analysis is presented. Two techniques are adopted in the proposed method to reduce the order of the system of equations when performing symbolic analysis. The first one uses voltage signal sources directly to perform symbolic analysis without replacing them with their nullor equivalences. The second one uses the nullor, grounded mirror, and floating mirror elements to model the active devices that involve differential or multiple single-ended signals. Practical examples are given which demonstrate the feasibility of the proposed methods.

    Cited by 3
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    Features of the Formation of the Crystal Structure, Grain Structure, Dielectric and Thermophysical Properties of Bismuth Ferrite Doped with Erbium

    by Aleksey Pavelko, Sidek Khasbulatov, Larisa Reznichenko, Lidia Shilkina, Haji Gadjiev, Abumuslim Bakmaev, Zairbek Omarov, Iliya Verbenko, Vladimir Alyoshin, Ivan Parinov, et al.

    The crystal structure and surface morphology of ceramics as well dielectric and thermal properties of Bi1−xErxFeO3 (where x = 0.05 − 0.20, Δх = 0.05) magnetoelectric solid solutions (SS) were investigated. The regularities of changes in phase composition, microstructure, electrical and dielectric properties of objects at room temperature are established.

    Cited by 4
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    Determination of the Electromagnetic Field on the Surface of the Beam Splitter of Laser Interferometer by Measuring the Displacements of Control Object Surfaces

    by Igor P. Miroshnichenko, Ivan A. Parinov, Shun-Hsyung Chang, Hung-Yu Wang

    The paper describes in detail the governing relationships for the electromagnetic field on the surface of the laser beam splitter of a laser interferometer. These expressions are intended for numerical simulation of measuring the displacements of control object surfaces by using a laser interferometer. We consider the cases of perpendicular and parallel polarizations of the radiation source. Moreover, the most relevant particular cases of constructing optical circuits of the interferometer in question are treated. The presented theoretical results have been used in numerical studies of the functional characteristics of promising contactless optical means of measuring displacements. The use of the described results has improved the quality and informativeness of the numerical simulation results of the measurement process of displacements by a laser interferometer.

    Cited by 3
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    Structurization, Phase Rule Diagram, Relaxation Processes and Radio-Absorbing Properties of Solid Solutions Based on a Binary System BaNb2O6-SrNb2O6

    by A.G. Abubakarov, A.V. Pavlenko, L.A. Shilkina, A.V. Turik, I.A. Verbenko, L.A. Reznichenko, K.P. Andryushin, I.N. Andryushina, H.A. Sadykov, I.A. Parinov, et al.

    The investigation results of the processes of phase formation in barium niobate, strontium, and their solid solutions in the conditions of the variability of the thermodynamic background are presented. The formation of a grain landscape and dielectric properties (including relaxation phenomena) in the solid solutions of strontium niobate and their solid solutions and the establishment of regularities in the formation of radio-absorbing properties in them are studied.

    Cited by 5
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    Thermodynamic Prehistory in the Formation of the Internal Structure of Highly Stable Ferroelectric Materials

    by Konstantin P. Andryushin, Inna N. Andryshina, Lidiya A. Shilkina, Svetlana I. Dudkina, Iliya A. Verbenko, Larisa A. Reznichenko, Mihail I. Mazuritskiy, Alexandr V. Nagaenko, Ivan A. Parinov, Shun-Hsyung Chang, et al.

    We investigated and presented our results for the dependence of the characteristics of the crystalline and grain structures of the PCR-13 material (based on the lead zirconate titanate (PZT) system), which was sintered in various ways, on the regulations for its preparation. The data from the microfluorescence analysis of the surface of ceramic materials were provided, which allowed us to state that micro X-ray fluorescence spectrometry (MICRO–XRF), supplemented by mathematical statistics, allows us to trace even small changes in the chemical composition of ceramic samples, reliably characterize the degree of surface homogeneity and provide strict mathematical conclusions related to the reproducibility of the properties of manufactured piezoelectric ceramic materials. Based on the obtained data, the optimal conditions for ceramics have been selected, which ensure homogeneity, high-density structure and reproducibility of the characteristics. This allows us to reliably use the material in frequency-selective equipment.

    Cited by 6
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