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Metal-organic frameworks with dinuclear metal centers for synergistically boosting COphotoreduction

Science China Chemistry 2024年

作者： hui-feng wang Wen-Jie Shi Yu-Xin Yang Bao-Xia Dong Tong-Bu Lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of CoZn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of CoCo-In,ZnZn-In,Co-In,and Zn-In,***,the catalytic activities of CoNi-In and NiZn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

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一致凸空间中的多重分裂可行性问题

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数学学报（中文版） 2024年第1期67卷 115-126页

作者：王丰辉崔欢欢洛阳师范学院数学科学学院洛阳471934

本文在一致凸Banach空间中研究了多重分裂可行性问题.通过将其转化为不动点问题,我们分别构造了并行与循环两种类型的迭代方法以求解此问题,并在较弱的几何条件下证明了它们的强收敛性.

关键词：分裂可行性问题一致凸性正规对偶映射

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A Zone Plate as a Tunable Terahertz Filter

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Chinese Physics Letters 2010年第6期27卷 97-99页

作者： feng hui wang Li Laboratory of Optical Physics Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190

A broadband tunable terahertz filter based on a zone plate is demonstrated in our terahertz time domain spec- trometer. The central bandpass frequency covers the whole spectral range of the terahertz wave emitted from a ZnTe emitter, from 0.5 THz to 2.5 THz, and can be tuned continuously by simply moving the zone plate along the terahertz beam path. The peak transmission is about 40% and the bandwidth varies from 0.16 THz to 0.25 THz at different bandpass frequencies when the aperture size is kept constant.

关键词： ZONE plates TUNABLE lasers TIME-domain analysis TERAHERTZ spectroscopy ZINC telluride BANDWIDTHS

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An Extension of a Simply Inequality Between von Neumann–Jordan and James Constants in Banach Spaces

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Acta Mathematica Sinica,English Series 2017年第9期33卷 1287-1296页

作者： Chang Sen YANG feng hui wang College of Mathematics and Information Science He'nan Normal UniversityXinxiang 453007P.R.China Department of Mathematics Luoyang Normal UniversityLuoyang 471022P.R.China

For a non-trivial Banach space X, let J（X）,CNj（X）,C（P）NJ（X） respectively stand for the James constant, the yon Neumann-Jordan constant and the generalized yon Neumann-Jordan constant receatly inroduced by Cui et al. In this paper, we discuss the relatioa between the James and the generalized yon Neumann-Jordan constants, and establish an inequality between them： C（P）NJ（X） ≤ J（X） with p 〉 2, which covers the well-known inequality CNJ（X） ≤ J（X）. We also introduce a new constant, from which we establish another inequality that extends a result of Alonso et al.

关键词： von Neumann-Jordan constant James constant inequalities

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The Existence of Solutions of （k, n - k） Conjugate Boundary Value Problems in Banach Spaces

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Chinese Quarterly Journal of Mathematics 2008年第3期23卷 470-474页

作者： YANG hui wang feng Department of Mathematics and Physics Anyang Institute of Technology Anyang 455000 China

In this paper, by use of the Schauder fixed-point theorem, the existence of solution of （k, n - k） Conjugate boundary value problems in Banach spaces is investigated.

关键词： boundary value problems existence fixed-point theorem

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Modeling the austenite-ferrite transformation in microalloyed steel P510L

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International Journal of Minerals,Metallurgy and Materials 2010年第5期17卷 558-566页

作者： Wan-hua yu Lue-ting Xua Guang-hong feng Chun-jing Wu Cheng Zhou hui-feng wang School of Materials Science and Engineering University of Science and Technology Beijing 100083 China Metallurgical Technology Institute Central Iron and Steel Research Institute Beijing 100081 China

Based on experimental results, the transformation kinetics and cooling characteristics of low-carbon steel were analyzed and modeled to quantitatively link the operational parameters of a process with the properties. From the continuous cooling transformation results, comparisons of the start temperature of austenite-ferrite transformation among three models were analyzed, and the optimal lnk and n, which are the parameters in the Avrami equation, were determined by applying two regression models at different cooling rates. The transformation kinetics during continuous cooling was determined. Furthermore, reasonable agreements between experimental results and predictions were obtained, which can demonstrate the rationality of the established models.

关键词： models phase transformation regression analysis kinetics

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Intelligent droplet tracking with correlation filters for digital microfluidics

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Chinese Chemical Letters 2021年第11期32卷 3416-3420页

作者： Libin Li Zhen Gu Jia-Le Zhou Bingyong Yan Cong Kong Hua wang hui-feng wang Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and TechnologyShanghai 200237China Key Laboratory of East China Sea Fishery Resources Exploitation Ministry of Agriculture and Rural AffairsEast China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesShanghai 200090China Department of Laboratory Medicine Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200137China

Tracking the movement of droplets in digital microfluidics is essential to improve its control stability and obtain dynamic information for its applications such as point-of-care testing,environment monitoring and chemical ***,an intelligent,accurate and fast droplet tracking method based on machine vision is developed for applications of digital *** continuously recognize the transparent droplets in real-time and avoid the interferes from background patterns or inhomogeneous illumination,we introduced the correlation filter tracker,enabling online learning of the multi-features of the droplets in Fourier *** show the proposed droplet tracking method could accurately locate the *** also demonstrated the capacity of the proposed method for estimation of the droplet velocity as faster as 20 mm/s,and its application in online monitoring the Griess reaction for both colorimetric assay of nitrite and study of reaction kinetics.

关键词： Digital microfluidics Correlation filter trackers Machine vision Reaction kinetics Colorimetric assay

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Octreotide acetate long-acting release in treatment of pancreatic neuroendocrine tumors

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Chinese Medical Journal 2009年第13期122卷 1582-1584页

作者： ZHANG Shi LI Yu-xiu LI Nai-shi LI Wen-hui ZHU hui-juan GU feng wang Heng Department of Endocrinology Key Laboratory of Endocrinology Ministry of Health Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100730 China

Pancreatic neuroendocrine tumours are uncommon neoplasms of the pancreas, accounting for around 2% of all primary pancreatic tumors. This specific group of tumours includes insulinoma, gastrinoma, glucagonoma, VIPoma, somatostatinoma and others. They may cause a clinical syndrome due to hormone overproduction. These tumours tend to be less aggressive than pancreatic adenocarcinoma, however, more than 50% of them have metastasized to the liver at the time of diagnosis. Under this circumstance, surgery is impossible to resect all metastases. Thus other various medical measures have been explored in the treatment of these tumors.

关键词： pancreatic neuroendocrine tumours glucagonoma gastrinoma octreotide acetate

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Spatial Distribution Feature Extraction Network for Open Set Recognition of Electromagnetic Signal

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 279-296页

作者： hui Zhang Huaji Zhou Li wang feng Zhou The Ministry Key Laboratory of Electronic Information Countermeasure and Simulation Xidian UniversityXi’an710071China Science and Technology on Communication Information Security Control Laboratory Jiaxing314033China

This paper proposes a novel open set recognition method,the Spatial Distribution Feature Extraction Network(SDFEN),to address the problem of electromagnetic signal recognition in an open *** spatial distribution feature extraction layer in SDFEN replaces convolutional output neural networks with the spatial distribution features that focus more on inter-sample information by incorporating class center *** designed hybrid loss function considers both intra-class distance and inter-class distance,thereby enhancing the similarity among samples of the same class and increasing the dissimilarity between samples of different classes during ***,this method allows unknown classes to occupy a larger space in the feature *** reduces the possibility of overlap with known class samples and makes the boundaries between known and unknown samples more ***,the feature comparator threshold can be used to reject unknown *** signal open set recognition,seven methods,including the proposed method,are applied to two kinds of electromagnetic signal data:modulation signal and real-world *** experimental results demonstrate that the proposed method outperforms the other six methods overall in a simulated open ***,compared to the state-of-the-art Openmax method,the novel method achieves up to 8.87%and 5.25%higher micro-F-measures,respectively.

关键词： Electromagnetic signal recognition deep learning feature extraction open set recognition

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Buckling Properties of Water-Drop-Shaped Pressure Hulls with Various Shape Indices Under Hydrostatic External Pressure

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China Ocean Engineering 2024年第1期38卷 1-17页

作者： DING Xiao-de ZHANG Jian wang Fang JIAO hui-feng wang Ming-lu School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Shanghai Engineering Research Center of Marine Renewable Energy College of Engineering Science and Technol-ogyShanghai Ocean UniversityShanghai 201306China China Ship Scientific Research Center Wuxi 214082China

The water-drop-shaped pressure hull has a good streamline,which has good application prospect in the underwater ***,this study conducted analytical,experimental and numerical investigation of the buckling properties of water-drop-shaped pressure hulls under hydrostatic pressure.A water-drop experiment was conducted to design water-drop-shaped pressure hulls with various shape *** critical loads for the water-drop-shaped pressure hulls were resolved by using Mushtari’s *** numerical simulations including linear buckling analysis and nonlinear buckling analysis including eigenmode imperfections were *** results indicated that the critical loads resolved by Mushtari's formula were in good agreement with the linear buckling loads from the numerical *** formula can be extended to estimate the buckling capacity of water-drop-shaped pressure *** addition,three groups of pressure hulls were fabricated by using stereolithography,a rapid prototyping ***,three groups of the pressure hulls were subjected to ultrasonic measurements,optical scanning,hydrostatic testing and numerical *** experimental results were consistent with the numerical *** results indicate that the sharp end of the water-drop-shaped pressure hulls exhibited instability compared with the blunt *** paper provides a new solution to the limitations of experimental studies on the water-drop-shaped pressure hulls as well as a new configuration and evaluation method for underwater observatories.

关键词： buckling pressure hull water drop underwater observatory

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