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A novel heterogeneous Co(Ⅱ)-Fenton-like catalyst for efficient photodegradation by visible light over extended pH

Science China Chemistry 2020年第12期63卷 1825-1836页

作者： wu-hua chen Jin-hua Xiong Xue Teng Jin-Xiao Mi Zhi-Biao Hu Haifeng Wang Zuofeng chen Fujian Provincial Colleges and University Engineering Research Center of Solid Waste Resource Utilization(Longyan University) College of Chemistry and Material ScienceLongyan UniversityLongyan 364012China Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory for Advanced Materials Centre for Computational Chemistry and Research Institute of Industrial CatalysisEast China University of Science and TechnologyShanghai 200237China Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China

A novel Co^Ⅱ-Fenton-like heterogeneous catalyst,(H3O)2[Co^Ⅱ(phen)(H2O)2]2[Mo^Ⅵ5O15(PO4)2]·4H2O (phen=1,10-phenanthroline,C12N2H8)(1),is synthesized and utilized for photocatalytic degradation of organic dyes and antibiotic in a wide range of *** experimental results show that 1 acting as the Fenton-like catalyst with H2O2 exhibits remarkable activity at pH 3–9 under vis-light irradiation and is merited with excellent recyclability and reusability.A variety of analytical methods,including in-situ electron paramagnetic resonance (EPR) spectroscopy and density functional theory (DFT) calculations,are applied to study the mechanism on generation of·OH and O2^·-radicals for photocatalytic *** suggests that,unlike the classical Fenton process involving the redox transformation of the central cations,the generation of·OH and O2^·-radicals is associated with the substitution of the coordinating water molecules at Co(Ⅱ) by H2O2 and/or OOH^-,followed by the light-driven O–O bond cleavage and *** outcomes of this study are striking which overcome the obstacles in the classical Fe^Ⅱ-Fenton process,including the slow redox transformation between Fe(Ⅱ) and Fe(Ⅲ) and the production of massive iron precipitates especially at elevated *** opens up new avenues for the development of the high-performance Fenton(-like) catalysts for photocatalytic degradation over extended pH and provides new insight into the related process.

关键词： Co^Ⅱ-Fenton-like reagent polyoxometalate photocatalytic degradation density functional theory(DFT)calculations in-situ EPR spectroscopic analysis

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Response enhancement of olfactory sensory neurons-based biosensors for odorant detection

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第4期10卷 285-290页

作者： Chun-sheng wu Pei-hua chen Qing YUAN Ping WANG Biosensor National Special Laboratory MOE Key Laboratory of Biomedical Engineering Department of Biomedical Engineering Zhejiang University Hangzhou 310027 China

This paper presents a novel strategy for the response enhancement of olfactory sensory neurons (OSNs)-based biosensors by monitoring the enhancive responses of OSNs to odorants. An OSNs-based biosensor was developed on the basis of the light addressable potentiometric sensor (LAPS), in which rat OSNs were cultured on the surface of LAPS chip and served as sensing elements. LY294002, the specific inhibitor of phosphatidylinositol 3-kinase (PI3K), was used to enhance the responses of OSNs to odorants. The responses of OSNs to odorants with and without the treatment of LY294002 were recorded by LAPS. The results show that the enhancive effect of LY294002 was recorded efficiently by LAPS and the responses of this OSNs-LAPS hybrid biosensor were enhanced by LY294002 by about 1.5-fold. We conclude that this method can enhance the responses of OSNs-LAPS hybrid biosensors, which may provide a novel strategy for the bioelectrical signal monitor of OSNs in biosensors. It is also suggested that this strategy may be applicable to other kinds of OSNs-based biosensors for cellular activity detection, such as microelectrode array (MEA) and field effect transistor (FET).

关键词： Olfactory sensory neurons (OSNs) Response enhancement Light addressable potentiometric sensor (LAPS) Olfactory-based biosensor

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Slow state estimation for singularly perturbed systems with discrete measurements

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Science China(Information Sciences) 2021年第7期64卷 252-254页

作者： Yunli LIU wu-hua chen Xiaomei LU College of Mathematics and Information Science Guangxi University

Dear editor,Many real-world systems exhibit a two-time-scale behavior,such as Hindmarsh-Rose oscillators, DC motors, power networks, and other related systems. Such systems can be modeled using singularly perturbed systems(SPSs). To alleviate the difficulties of high dimensionality and stiffness, Kokotovi′c et al. [1] developed the singular perturbation method for reducing the model order, whereby the full system design is divided into designing separate controllers for fast and slow subsystems. In this regard, O'Reilly [2] proposed a composite full-order observer design method for linear SPSs through observer design in two separate time-scales. Later,

关键词： observer design singularly perturbed systems discrete measurements slow manifold reduced-order observer

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Mean Square Exponential Stability of Uncertain Linear Impulsive Stochastic Systems with Markovian Switching

Mean Square Exponential Stability of Uncertain Linear Impuls...

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第25届中国控制与决策会议

作者： wu-hua chen chenghai Wei Xiaomei Lu College of Mathematics and Information Science Guangxi University Guangxi Key Laboratory of Power System Optimization and Energy Technology Guangxi University

ISBN: (纸本)9781467355339

This paper considers mean square exponential stability of uncertain linear impulsive systems with Markovian switching. By employing the method of time-varying Lyapunov functions, some new sufficient conditions for mean square exponential stability are established. The new stability conditions depend on both on the lower bound and the upper bound of impulse intervals. Numerical examples are provided to show the effectiveness of the proposed method.

关键词： Impulsive Systems Stochastic Systems Markovian Switching Exponential Stability

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Disturbance observer-based control design for a class of nonlinear stochastic systems with periodically intermittent measurement 36

Disturbance observer-based control design for a class of non...

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第36届中国控制会议

作者： Kui Ding wu-hua chen Xiaomei Lu Zhen Ruan College of Mathematics and Information Science Guangxi University

ISBN: (纸本)9781538629185

This paper treats the control problem of a class of nonlinear stochastic systems with unknown external disturbance and periodically intermittent measurement. It is assumed that the external disturbance is generated by an exogenous system with unknown initial condition, and the state information ia available only on some disconnected time intervals. A composite control method using the intermittent state information is proposed, which consists of an intermittent feedback control law and a disturbance observer. The stability property of the closed-loop error system is analyzed using a piecewise-time-dependent Lyapunov function approach. Then, a sufficient condition for the existence of the desired composite controllers is derived in terms of matrix inequalities. Finally, a numerical example is given to illustrate the effectiveness of the proposed result.

关键词： Disturbance observer-based control Periodically intermittent measurement Piecewise time-dependent Lyapunov function Linear matrix inequalities(LMIs)

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Nonlinear Hyperbolic-Parabolic System Modeling Some Biological Phenomena

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Journal of Partial Differential Equations 2011年第1期24卷 1-14页

作者： wu Shaohua chen hua School of Mathematics and Statistics Wuhan University Wuhan 430072 China.

In this paper, we study a nonlinear hyperbolic-parabolic system modeling some biological phenomena. By semigroup theory and Leray-Schauder fixed point argument, the local existence and uniqueness of the weak solutions for this system are proved. For the spatial dimension N = 1, the global existence of the weak solution will be established by the bootstrap argument.

关键词： Hyperbolic-parabolic system chemosensitive movement external signal global existence.

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A REMARK ON THE RADIATION CONDITIONS

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Journal of Hydrodynamics 1991年第4期3卷 43-48页

作者： wu Jian-hua chen Yao-song Dept.of Mechanics,Peking Uuiversity,Beijing 100871,P.R.China

By studying stationary solution of the initial value problem of wave diffraction by a body moving with con- stant speed in waves,the boundary value problem of the stationary solution has been derived in this *** is proved that the free surface condition including a small damping μ,which may be seen as either real or fictitious, implies the radiation *** work may be seen as the mathematical proof of the Rayleigh stress and make one have more knowledge about the radiation condition.

关键词： A REMARK ON THE RADIATION CONDITIONS exp

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Value of frozen section examination in diagnosis and treatment of high-grade cervical intraepithelial neoplasia

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Chinese Medical Journal 2012年第14期125卷 2462-2465页

作者： REN Fang FENG Wei SHI Hui-rong wu Qing-hua chen Zhi-min Department of Obstetrics and Gynecology First Affiliated Hospitalof Zhengzhou University Zhengzhou Henan 450052 China

Background Invasive cancer of the cervix is considered a preventable disease because it has a long pre-invasive state, cervical cytology screening programs are currently available, and treatment of pre-invasive lesions is effective. We tested the accuracy of frozen section examination （FSE） of cone specimens to identify the endocervical margin and rule out invasion in patients with high-grade cervical intraepithelial neoplasia （CIN）. Methods For 320 consecutive patients with a preoperative biopsy result of CIN stage 2/3, cold-knife conization （CKC） was performed followed by FSE. The results from analyses of permanent paraffin sections （PS） were compared with the FSE findings. Results The accuracy of FSE was 87% （278/320）. For all of the seven patients with an invasive squamous cell carcinoma of the cervix identified by FSE, the diagnosis was confirmed by PS analysis. For one patient, the FSE result was cervicitis, whereas PS ananlysis showed microinvasive carcinoma. Appropriate surgery was performed for all patients based on the FSE and biopsy results. The FSE and PS results were not significantly different （P=-0.000）. Definitive examination of margin status using PS was concordant with FSE findings in all cases. Conclusions FSE is a rapid and reliable method for evaluating CKC specimens. It can identify frank invasion, permit adequate treatment in a one-stage procedure, and reliably detect clear resection margins. Since discrepancies do exist and may result in inappropriate treatment, further research is required to decrease these discrepancies and avoid missing even one case.

关键词： cervical intraepithelial neoplasia frozen section examination cold-knife conization, the upper endocervical margin, resection margin

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李煜词的章法新变

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中南民族大学学报（人文社会科学版） 2022年第10期42卷 155-163,187,188页

作者：吴晨骅湖南师范大学文学院湖南长沙410081

章法结构是词的形式要素之一,词风变化与章法变化密切相关。作为唐五代词风转变的典范词人,李煜之词在自然的语言风格背后隐藏着为人忽视的细腻章法。其现存词作,存在锁链结构、双层结构、点面结构、圆形结构四种主要的章法结构。李煜... 详细信息

章法结构是词的形式要素之一,词风变化与章法变化密切相关。作为唐五代词风转变的典范词人,李煜之词在自然的语言风格背后隐藏着为人忽视的细腻章法。其现存词作,存在锁链结构、双层结构、点面结构、圆形结构四种主要的章法结构。李煜综合应用这四种结构,并借助过片处的暗转、使用问句、打破单句长度限制等发挥结构性作用的词句细节处理,超越了温庭筠的意象直接并置、韦庄的凸显联系词等方法,因而得以实现全篇浑融的“神秀”艺术境界。

关键词：李煜词章法结构

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尚雅重情,论开清代——略论《兰皋明词汇选》的词学批评观

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北京社会科学 2018年第4期 61-69页

作者：吴晨骅武汉大学文学院武汉430072

选本是文学批评的一种特殊形式。《兰皋明词汇选》是清初康熙元年(1662)嘉兴顾璟芳等人编选的一部专门的明词选,附有多篇序文和大量评点,构成内蕴丰富的副文本。它们与该书的选词倾向、体例等要素一道,反映了《兰皋明词汇选》尚雅重情... 详细信息

选本是文学批评的一种特殊形式。《兰皋明词汇选》是清初康熙元年(1662)嘉兴顾璟芳等人编选的一部专门的明词选,附有多篇序文和大量评点,构成内蕴丰富的副文本。它们与该书的选词倾向、体例等要素一道,反映了《兰皋明词汇选》尚雅重情的词学批评观,体现出明清之际词学观念调和情雅的过渡性特点。通过其与《明词综》的比较,可以重估该选本在清代词学发展中的价值。

关键词：明词选本副文本评点明词综

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