Preparation and Characterization of Proton Conductive Phosphosilicate Membranes Based on Inorganic-Organic Hybrid Materials

Huang, Sheng-Jian,Lee, Hoi-Kwan,Kang, Won-Ho Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.2

A series of proton conductive inorganic-organic hybrid membranes doped with phosphoric acid ($H_3PO_4$) and/or triethylphosphate (PO(OEt)$_3$) have been prepared by sol-gel process with 3-glycidoxypropyltrimethoxysilane (GPTMS), 3-aminopropyltriethoxysilane (APTES) and tetraethoxysilane (TEOS) as precursors. High proton conductivity of 3.0 ${\times}$ $10^{-3}$ S/cm with composition of 50TEOS-30GPTMS-20APTES-50$H_3PO_4$ was obtained at 120 ${^{\circ}C}$ under 50% relative humidity. Thermal stability of membrane was significantly enhanced by the presence of SiO$_2$ framework up to 250 ${^{\circ}C}$. XRD revealed that the gels are amorphous. IR spectra showed a good complexation of $H_3PO_4$ in the matrix. The conductivity under 75% relative humidity was significantly improved by addition of APTES due to the increase in concentration of defected site in hybrid matrix. The effect of PO(OEt)$_3$, humidifying time, and heat-treatment were also investigated. PO(OEt)$_3$ had no improvement on conductivity and conductivity increased with humidifying time, however, decreased with heating temperature.

Association between the TGFBR2 G-875A Polymorphism and Cancer Risk: Evidence from a Meta-analysis

Huang, Yong-Sheng,Zhong, Yu,Yu, Long,Wang, Lin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.20

Disrupted transforming growth factor-${\beta}$ (TGF-${\beta}$) signaling is involved in the development of various types of cancer and the TGF-${\beta}$ receptor II (TGFBR2) is a key mediator of TGF-${\beta}$ growth inhibitory signals. It is reported that the G-875A polymorphism in TGFBR2 is implicated in risk of various cancers. However, results for the association between this polymorphism and cancer remain conflicting. To derive a more precise estimation, a meta-analysis of 3,808 cases and 4,489 controls from nine published case-control studies was performed. Our analysis indicated that G-875A is associated with a trend of decreased cancer risk for allele A versus(vs.) allele G [odds ratio (OR) =0.64, 95% confidence intervals (CI): 0.55-0.74], as well as for both dominant model [(A/A+G/A) vs. G/G, OR=0.76, 95% CI: 0.64-0.90] and recessive model [A/A vs. (G/G+G/A), OR=0.74, 95% CI: 0.59-0.93). However, larger scale primary studies are required to further evaluate the interaction of TGFBR2 G-875A polymorphism and cancer risk in specific cancer subtypes.

Two mitochondrial genomes of genus Megacampsomeris Betrem, 1928 (Hymenoptera: Scoliidae) with their phylogenetic implications

Huang Li-Sheng,Liu Zhen,Chen Hua-Yan,Chen Xue-Xin 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2

We determined two mitochondrial genomes of genus Megacampsomeris Betrem, 1928, i.e., M. binghami (Betrem, 1928) with 16,461 bp and M. farrenwhitei (Betrem, 1928) with 15,834 bp in length respectively and anotated the sequence of M. prismatica (Smith, 1855). These sequence all possess 37 mitochondrial genes, containing 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs) including one extra trnM gene while missing trnK gene, and two ribosomal RNA (rRNA) genes separately. Gene rearrangement showed inversion event involing protein-coding and tRNA genes. The protein-coding genes of 18 species representing seven superfamilies and 12 families from Aculeata were used for phylogenetic analysis by maximum likelihood (ML) analysis and Bayesian inference (BI), with Cotesia vestalis from Braconidae and Hyposoter sp. from Ichneumonidae was as outgroups. M. prismatica was more closer to M. binghami than M. farrenwhitei in our inferences. Consistent with previous studies, our results supported paraphyly of the superfamily Chrysidoidea and a sister group relationship between Formicoidea and Vespoidea, but failed to recover the monophyly of superfamilies Apoidea and Pompiloidea.

A Satcom On-the-move Phased-array Antenna Tracking Algorithm on Robot Operating System

Sheng-En Huang,Po-Hsun Chang,Xiu-Lin Lu,Jyh-Ching Juang 제어로봇시스템학회 2023 제어로봇시스템학회 국제학술대회 논문집 Vol.2023 No.10

Multi-Function Distributed Generation with Active Power Filter and Reactive Power Compensator

Huang, Shengli,Luo, Jianguo The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6

This paper presents a control strategy for voltage-controlled multi-function distributed generation (DG) combined with an active power filter (APF) and a reactive power compensator. The control strategy is based on droop control. As a result of local nonlinear loads, the voltages of the point of common coupling (PCC) and the currents injecting into the grid by the DG are distorted. The power quality of the PCC voltage can be enhanced by using PCC harmonic compensation. In addition, with the PCC harmonic compensation, the DG offers a low-impedance path for harmonic currents. Therefore, the DG absorbs most of the harmonic currents generated by local loads, and the total harmonic distortion (THD) of the grid connected current is dramatically reduced. Furthermore, by regulating the reactive power of the DG, the magnitude of the PCC voltage can be maintained at its nominal value. The performance of the DG with the proposed control strategy is analyzed by bode diagrams. Finally, simulation and experimental results verify the proposed control strategy.

Accurate Power Sharing in Proportion for Parallel Connected Inverters by Reconstructing Inverter Output Impedance

Huang, Shengli,Luo, Jianguo The Korean Institute of Power Electronics 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6

This paper presents parallel-connected inverters to achieve accurate proportional power sharing. Due to line impedance mismatch, reactive power cannot be distributed proportionally when using the conventional $P-{\omega}$ and $\mathcal{Q}-E$ droop. In order to realize reactive proportional power sharing, the ratio of the droop coefficients should be inversely proportional to their power-sharing ratios. Meanwhile, the ratio of the line impedance should be inversely proportional to the desired power-sharing ratio, which is very difficult to be met in practice. In order to deal with this issue, a practical control strategy is presented. By measuring the PCC voltage and using the virtual impedance, the output impedance of individual inverters is reconstructed to counteract the line impedance effect. In order to guarantee system stability, a low pass filter is designed to suppress the bandwidth of the line compensation. Finally, the simulation and experimental results are given to verify the effectiveness of the proposed control strategy.

Multi-Function Distributed Generation with Active Power Filter and Reactive Power Compensator

Shengli Huang,Jianguo Luo 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6

This paper presents a control strategy for voltage-controlled multi-function distributed generation (DG) combined with an active power filter (APF) and a reactive power compensator. The control strategy is based on droop control. As a result of local nonlinear loads, the voltages of the point of common coupling (PCC) and the currents injecting into the grid by the DG are distorted. The power quality of the PCC voltage can be enhanced by using PCC harmonic compensation. In addition, with the PCC harmonic compensation, the DG offers a low-impedance path for harmonic currents. Therefore, the DG absorbs most of the harmonic currents generated by local loads, and the total harmonic distortion (THD) of the grid connected current is dramatically reduced. Furthermore, by regulating the reactive power of the DG, the magnitude of the PCC voltage can be maintained at its nominal value. The performance of the DG with the proposed control strategy is analyzed by bode diagrams. Finally, simulation and experimental results verify the proposed control strategy.

Accurate Power Sharing in Proportion for Parallel Connected Inverters by Reconstructing Inverter Output Impedance

Shengli Huang,Jianguo Luo 전력전자학회 2018 JOURNAL OF POWER ELECTRONICS Vol.18 No.6

This paper presents parallel-connected inverters to achieve accurate proportional power sharing. Due to line impedance mismatch, reactive power cannot be distributed proportionally when using the conventional P-ω and Q-E droop. In order to realize reactive proportional power sharing, the ratio of the droop coefficients should be inversely proportional to their power-sharing ratios. Meanwhile, the ratio of the line impedance should be inversely proportional to the desired power-sharing ratio, which is very difficult to be met in practice. In order to deal with this issue, a practical control strategy is presented. By measuring the PCC voltage and using the virtual impedance, the output impedance of individual inverters is reconstructed to counteract the line impedance effect. In order to guarantee system stability, a low pass filter is designed to suppress the bandwidth of the line compensation. Finally, the simulation and experimental results are given to verify the effectiveness of the proposed control strategy.

Preparation and Characterization of Proton Conductive Phosphosilicate Membranes Based on Inorganic-Organic Hybrid Materials

Sheng-Jian Huang,Hoi-Kwan Lee,Won-Ho Kang* 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.2

A series of proton conductive inorganic-organic hybrid membranes doped with phosphoric acid (H3PO4 ) and/or triethylphosphate (PO(OEt)3) have been prepared by sol-gel process with 3-glycidoxypropyltrimethoxy- silane (GPTMS), 3-aminopropyltriethoxysilane (APTES) and tetraethoxysilane (TEOS) as precursors. High proton conductivity of 3.0´103 S/cm with composition of 50TEOS- 0GPTMS-20APTES-50H3PO4 was obtained at 120 ºC under 50% relative humidity. Thermal stability of membrane was significantly enhanced by the presence of SiO2 framework up to 250 ºC. XRD revealed that the gels are amorphous. IR spectra showed a good complexation of H3PO4 in the matrix. The conductivity under 75% relative humidity was significantly improved by addition of APTES due to the increase in concentration of defected site in hybrid matrix. The effect of PO(OEt)3, humidifying time, and heat-treatment were also investigated. PO(OEt)3 had no improvement on conductivity and conductivity increased with humidifying time, however, decreased with heating temperature.

A Lithium-Ion Batteries Fault Diagnosis Method for Accurate Coulomb Counting State-of-Charge Estimation

Huang Cong-Sheng 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1

Real-time and accurate estimating state-of-charge (SOC) of a lithium-ion battery is a critical but technically challenging task for battery management systems. Coulomb counting algorithm is an efective real-time SOC estimation algorithm but sufers from three typical faults: initial SOC fault, battery capacity fault, and biased load current measurement fault, making its estimation accuracy challenging in practice. To solve the above-mentioned problem, this paper proposes a model-based fault diagnosis algorithm for the Coulomb counting algorithm. The proposed algorithm efectively diagnoses the faults, where the diagnosis requires merely the load current and the terminal voltage of the battery without extra measurements or prior knowledge of the battery. Also, this algorithm is performed alongside the Coulomb counting algorithm either intermittently or remotely in the cloud to ensure the real-time SOC estimation feature of the Coulomb counting algorithm. To showcase the performance of the proposed algorithm, two experiments: a battery discharging experiment using a standard electric vehicle driving profle and a Monte Carlos experiment were performed. Both experiments well-demonstrate the efectiveness of the proposed battery electric circuit model-based SOC estimation algorithm in diagnosing the three typical faults of the Coulomb counting algorithm with 100% true-positive rates.