A5067004674- Microgrid Control and Optimization
- Phytochemistry and Biological Activities
- Natural product bioactivities and synthesis
- Bioactive Natural Diterpenoids Research
- Islanding Detection in Power Systems
- Natural Compound Pharmacology Studies
- Biological Activity of Diterpenoids and Biflavonoids
- Power Systems and Renewable Energy
- Traditional and Medicinal Uses of Annonaceae
- Smart Grid Energy Management
- Synthesis of Organic Compounds
- Multilevel Inverters and Converters
- Bioactive natural compounds
- Phytochemical compounds biological activities
- Advanced DC-DC Converters
- Plant-based Medicinal Research
- Marine Sponges and Natural Products
- Biological and pharmacological studies of plants
- Chromatography in Natural Products
- HVDC Systems and Fault Protection
- Plant chemical constituents analysis
- Optimal Power Flow Distribution
- Power Systems Fault Detection
- Alkaloids: synthesis and pharmacology
- Smart Grid and Power Systems
Xi'an University of Technology
2016-2025
Chengdu University of Traditional Chinese Medicine
2022-2024
Air Force Engineering University
2024
Air Force Medical University
2024
Xishuangbanna Tropical Botanical Garden
2011-2023
Chinese Academy of Sciences
2007-2023
Guizhou University
2020
Temple University
2020
Xinxiang Medical University
2020
Kleijnen Systematic Reviews (United Kingdom)
2019
Abstract A uric acid (UA) electrochemical biosensor was constructed using ferrocene (Fc) decorated cuprous oxide (Cu 2 O) enhanced electro-active characteristics and covalently immobilized with uricase (UOx) on glassy carbon electrode (GCE). The of the fabricated analysed by cyclic voltammetry, impedance spectroscopy differential pulse voltammetry (DPV). DPV studies revealed rapid response UOx/Fc/Cu O/GCE towards UA in a wide concentration range 0.1–1,000 μM sensitivity 1.900 μA mM −1 cm −2...
Distributed energy storage systems (DESSs) play an important role in maintaining voltage stability DC microgrids. In order to improve the inertia of microgrid and balance charge/discharge power state-of-charge (SOC) each unit (ESU), SOC-based virtual machine (VDCM) control strategy for DESSs is proposed this paper. By adding SOC armature resistance, improved algorithm can dynamically simultaneously. article, transient bus enhanced using output VDCM, differences between ESUs are rapidly...
ABSTRACT With the widespread integration of distributed power sources, DC microgrids (DCMGs) have become an important component new smart grid. Detecting unintentional islanding, defined as inadvertent disconnection generators (DGs) from utility grid, is a significant challenge for microgrids. When in near‐zero mismatch, traditional passive over/under voltage islanding detection method will enter non‐detection zone (NDZ), and active compromise quality due to injection disturbance signals....
Conventional virtual dc machine (VDCM) control incorporates the mechanical characteristics of machines to emulate necessary system inertia. Utilizing already-existing proportional-integral loops in conventional VDCM control, this article eliminates requirement calculating torques using power measurements, i.e., power-loop-free VDCM, which greatly simplifies and reduces required resources for implementation. Theoretical analysis proposed shows that controlled steady-state dynamic are not...
DC microgrid has become an important part of supporting "carbon peaking, carbon neutralization" and building a low-carbon energy system. However, the short-circuit current rises rapidly great impact, threatening normal operation microgrid. As main protection strategy for removing faults, differential can quickly selectively remove fault lines, but it depends on communication. In addition, high impedance short circuit may also lead to failure strategy. To improve quick action sensitivity...
Three new ent-kaurane diterpenoids laxiflorin E (1), H (6) and I (8) were isolated from the leaves of Isodon eriocalyx var. laxiflora, along with nine known diterpenoids, eriocalyxin A (2), C (3), D (4), (5), maoecrystal S (7), Q (9), B (10), (11) enmelol (12). The structures compounds determined by spectroscopic methods. Compounds 1 - 5 are 6,7-seco-ent-kaurane-7,20-olide 6 12 belong to 7,20-epoxy-ent-kauranoids. spectral data (12) reported here for first time. Ten these tested their...
The bus voltage of DC microgrid is the key indicator stable operation system. energy storage units play an important role in maintaining stability microgrid. In this paper, a virtual machine (VDCM) control strategy converter adopted, aiming to solve problem that vulnerable disturbed by renewable or loads and cannot be well maintained. This method simulates characteristics robust flexible DC/DC method, which can make connection, thus effectively restrain disturbance so as enhance A simulation...
Four new ent-kaurane diterpenoids, laxiflorins J−M (1−4), along with maoecrystal A (5) and P (6), were isolated from the leaves of Isodon eriocalyx var. laxiflora. Their structures determined by spectroscopic analyses. All compounds assayed for their cytotoxic effects on human tumor K562, A549, T24 cell lines. Compounds 1 6 showed significant inhibitory K562 cells, IC50 values less than 0.5 μg/mL. Compound 3 also demonstrated activities against all three types in range 1−25
Abstract Three new caged prenylxanthones (xanthone=9 H ‐xanthen‐9‐one), named neobractatin ( 1 ), 3‐ O ‐methylneobractatin 2 and ‐methylbractatin 3 along with eight known compounds, were isolated from the twig of Garcinia bracteata. The structures compounds elucidated on basis 1D‐ 2D‐NMR experiments, including HMBC, HSQC, H, H‐COSY, ROESY, as well HR‐MS analysis.
Aiming at the problems of large detection blind areas and difficult threshold settings in traditional passive islanding methods, this paper proposes an intelligent method based on adaptive boosting (Adaboost) algorithm. This first uses feature screening technology to obtain key electrical quantities DC microgrid islands form a sample set, then rely Adaboost algorithm generate high-precision island classification model realize operation status. It has advantages automatic setting threshold,...
An improved control strategy for virtual DC motor (VDCM) with storage energy interface in microgrids is proposed this paper. Through adding differential compensations to feedforward channels traditional VDCM controls, resiliency of can be enhanced converter damping against disturbances from load variations and renewable sources. Three compensation methods are presented, their impacts on bus voltage stabilization analyzed. The framework validated by simulations, results verify the enhancement...
Eight new abietane diterpenoids, coleon U 11-acetate (1), 16-acetoxycoleon (2), and xanthanthusins F−K (3−8), together with five known analogues, (9), 16-O-acetylcoleon C (10), U-quinone (11), 8α,9α-epoxycoleon (12), xanthanthusin E (13), were isolated from the aerial parts of Coleus xanthanthus. The structures 1−8 elucidated on basis spectral methods. Compounds 1, 5, 11−13 evaluated for their cytotoxicity against K562 human leukemia cells.
DC microgrids are becoming popular in distribution systems based on its higher reliability and system efficiency. bus signal (DBS) control as a common strategy was widely used dc microgrids, which, mode of each power electronic converter is triggered by monitoring the voltage variation to keep balance microgrid. Most microgrid stability analysis linear impedance matching theory. But will be nonlinear when operation automatically switched switching information. In this paper, theory analyze...
Acupuncture is a promising non-pharmaceutical complementary therapy in treating prolonged Disorders of consciousness (pDOC), but solid evidence to support its effectiveness and safety still lacking. Thus, the purpose this study investigate efficacy acupuncture-assisted for pDOC patients.
Two new limonoids, namely 14,15-didehydroruageanin A (1) and 3-O-methyl- butyrylseneganolide (2), were isolated from the fruits of Khaya ivorensis along with six known limonoids: seneganolide (3), 1,3-dideacetylkhivorin (4), 7-deacetylkhivorin (5), 3-deacetylkhivorin (6), 1-deacetylkhivorin (7), 3-deacetyl-7-oxokhivorin (8). All compounds evaluated for their cytotoxicity against five tumor cell lines.
After one-month of oral treatment with traditional Chinese medicine decoction, without using other drugs, the lung inflammatory exudate, pulmonary fibrosis and quality life a 61-year-old female patient corona virus disease 2019 (COVID-19) were significantly improved. No recurrence or deterioration patient's condition was found within seven weeks follow-up, no adverse events occurred, indicating that decoction able to improve inflammation in recovering from COVID-19, but further research is...
Acupuncture is a promising non-pharmacological therapy for patients with prolonged disorder of consciousness (PDOC); however, its underlying mechanism remains uncertain. This study aimed to reveal the modulatory effects acupuncture on cerebral cortex activity among PDOC.Twenty-eight PDOC were randomly assigned treatment (n = 14) or control group. The group received one session acupuncture, while sham acupuncture. All underwent evaluation functional connectivity and activation response...
Five new ent-kaurane diterpenoids, enanderianins K-O (1-5), and one ent-abietane diterpenoid, enanderianin P (6), together with five known rabdocoetsin A (7), B (8), D (9), megathyrin (10), (11) were isolated from the aerial parts of Isodon enanderianus. Their structures determined by spectral means. Some diterpenoids tested for their cytotoxicity against human tumor K562 cells. Compounds 1, 2, 6, 8, 9 showed significant inhibitory activities cells IC50 values ranging 0.13 to 0.87 microg/mL.
Abstract Three new ent ‐clerodane diterpenoids, isoscoparin A, B, and C ( 1 – 3 ), were isolated from Isodon scoparius. Their structures determined by NMR‐spectra analysis. The biogenetic implication of the diterpenes genus is discussed.