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Finite Frequency Fault Detection for T-S Fuzzy Singular Multiple Timedelay Systems
Ding Zhai,Li-Wei An,Jing-Hao Li,Qing-Ling Zhang 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.4
This paper focuses on the problem of fault detection (FD) for a class of nonlinear systems describedby the T-S fuzzy singular model with multiple time delays and actuator faults. Two finite-frequency performanceindices are introduced to measure fault sensitivity and disturbance robustness. To reduce the conservatism of theexisting results, a finite frequency domain approach to fuzzy singular multiple time-delay systems is proposed. Then based on the approach, filter design conditions for the solvability of this problem are presented in terms oflinear matrix inequalities (LMIs). Finally, simulation studies are provided to demonstrate the application of theproposed method.
Bufalin Induces Mitochondrial Pathway-Mediated Apoptosis in Lung Adenocarcinoma Cells
Ding, Da-Wei,Zhang, Yong-Hong,Huang, Xin-En,An, Qing,Zhang, Xun Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.23
Background: To evaluate the effects of bufalin in A549 human lung adenocarcinoma epithelial cells in vitro and assess the underlying mechanisms. Materials and Methods: Human A549 non-small cell lung cancer (NSCLC) cells were treated with various concentrations of bufalin. Cell proliferation was measured by CCK-8 assay, apoptotic cell percentage was calculated by flow cytometry and morphological change was observed by inverted phase contrast microscopy/transmission electron microscopy. In addition, the membrane potential of mitochondria was detected by JC-1 fluorescence microscopy assay, and the related protein expression of cytochrome C and caspase-3 was analyzed by Western blotting. Results: Bufalin could inhibit the proliferation of A549 cells via induction of apoptosis, with the evidence of characteristic morphological changes in the nucleus and mitochondria. Furthermore, bufalin decreased the mitochondrial membrane potential with up-regulation of cytochrome C in the cytosol, and activation of caspase-3. Conclusions: Bufalin inhibits the proliferation of A549 cells and triggers mitochondria-dependent apoptosis, pointing to therapeutic application for NSCLC.
Zhan-qing Zhang,Yan-bing Wang,,Wei Lu,,Dan-ping Liu,,Bi-sheng Shi,,Xiao-nan Zhang,,Dan Huang,,Xiu-fen Li,,Xin-lan Zhou,,Rong-rong Ding, 대한진단검사의학회 2019 Annals of Laboratory Medicine Vol.39 No.1
Background: We examined changes in hepatitis B core-related antigen (HBcrAg) during the four sequential phases of chronic hepatitis B virus (HBV) infection: hepatitis B e antigen (HBeAg)-positive chronic infection (EPCI) and hepatitis (EPCH), followed by HBeAg-negative chronic infection (ENCI) and hepatitis (ENCH). We compared the performance of serum HBcrAg, hepatitis B surface antigen (HBsAg), and HBV DNA in predicting EPCH and ENCH.
Transmembrane Protein 166 Expression in Esophageal Squamous Cell Carcinoma in Xinjiang, China
Sun, Wei,Ma, Xiu-Min,Bai, Jing-Ping,Zhang, Guo-Qing,Zhu, Yue-Jie,Ma, Hai-Mei,Guo, Hui,Chen, Ying-Yu,Ding, Jian-Bing Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8
Objective: Transmembrane protein 166 (TMEM166) expression in esophageal squamous cell carcinoma (ESCC) and remote normal esophageal tissues was examined to assess any role in tumour biology. Methods: TMEM166 mRNA expression in 36 cases with ESCC (36 tumour samples, 36 remote normal esophageal tissue samples) was detected by RT-PCR. TMEM166 protein expression was analysed in paraffin-embedded tissue samples from the same cases by immunohistochemistry. Results: Semi-quantitative analysis showed TMEM166 mRNA expression in ESCCs to be significantly lower than in remote normal esophageal tissues ($0.759{\pm}0.713$ vs. $2.622{\pm}1.690$, P=0.014). TMEM166 protein expression was also significantly reduced (69.4% vs. 94.4%, P<0.01). Conclusion: TMEM166 mRNA and protein expression demonstrated significant reduction in ESCCs compared with remote esophageal tissues, albeit with no correlation with tumour size, differentiation, stage, and lymph node metastasis, suggesting a role in regulating autophagic and apoptotic processes in the ESCC.
The mechanism of enhanced photocatalytic activity of SnO2 through fullerene modification
Shuang-Shuang Ding,Wei-Qing Huang,Bing-Xin Zhou,Ping Peng,Wangyu Hu,Meng-Qiu Long,Gui-Fang Huang 한국물리학회 2017 Current Applied Physics Vol.17 No.11
Carbon nanomaterials are prominent building blocks in the synthetic van der Waals (vdW) heterostructures with desired properties. Scientific understanding of their interfacial interactions is the premise to design this kind of vdW heterostructures with optimal performance.We here study the mechanism of enhanced photocatalytic activity of SnO2 by fullerene modification at electronic level, to explore the interfacial interaction and its correlation with photocatalytic activity. The results show that the interfacial interaction increases with the number of C atom of fullerene, and leads to some of C atoms be positively/ negatively charged, making the fullerene a highly active co-catalyst in heterostructures. Compared to pristine SnO2, the band gap of the heterostructures is much smaller, leading to their absorption wavelength extending the entire visible region. Interestingly, a staggered type-II band alignment in the C20 (C60)/SnO2 (101) heterostructures results into the robust separation of photoexcited charge carriers between the two constituents, indicating that the fullerene is an effective sensitizer, and thus enhanced photocatalytic activity. These findings can rationalize the available experiment and will be of broad interest in developing the highly efficient semiconductor photocatalysts via fullerene modification.
Yingying Ren,Qing Li,Da-Wei Ding,Wen Kang,Yunxia Xia 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.11
This paper investigates the robust controller design for polytopic-type uncertain linear systems disturbed by external disturbances in restricted frequency ranges. The primary goal is to design a state-feedback controller, ensuring that the closed-loop system is robustly stable and keeps a prescribed finite-frequency (FF) disturbanceattenuation performance. For this purpose, a robust generalized Kalman-Yakubovich-Popov (KYP) lemma is applied to describe the finite-frequency specification, aiming at improving the disturbance-attenuation performance over the given frequency range. In this setting, more relaxed analysis conditions for robust stability and finitefrequency specifications are derived by introducing additional slack variables, which contain some existing conditions as special cases. Based on the homogeneous polynomially parameter-dependent (HPPD) technique, new controller design conditions in terms of linear matrix inequalities (LMIs) are developed. It is shown that the proposed finite-frequency design scheme can achieve a better disturbance- suppression performance in restricted frequency ranges than the existing ones, which is illustrated by an example about the satellite system.
Lin Chen,Qing-Qing Sun,Jing-Jing Gu,Yan Xu,Shi-Jin Ding,David Wei Zhang 한국물리학회 2011 Current Applied Physics Vol.11 No.3
Resistive switching behavior of Nb_2O_5 prepared by atomic layer deposition was investigated as a promising candidate for next generation nonvolatile memory technology. The crystalline structure of deposited film at 300 ℃ was found to be polycrystalline by X-ray diffraction (XRD) and the film was estimated to be oxygen deficient by X-ray photoelectron spectroscopy (XPS). The low resistance ON state and high resistance OFF state can be reversibly altered under low voltage about ±1 V. More than 1000reproducible switching cycles by DC voltage sweep were observed with a resistance ratio above 10,which was large enough to read out for memory applications. Moreover, the HRS and LRS of the devices are stable for more than 5 × 10^4 s and does not show any degradation during the test.