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Asymmetric interfacial engineering regulated charge distribution on Ru/Ni-N-C sites for efficient hydrogen evolution reaction in alkaline and seawater electrolytes

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Science China Chemistry 2025年

作者： Rui Yu Xi cao Chengyang Zhu Qingqing Chen Ziyi Yan binbin Jiang Junjie Mao Xianwen Wei Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes College of Chemistry and Materials ScienceAnhui Normal University Anhui Provincial Key Laboratory of Advanced Catalysis and Energy Materials School of Chemistry and Chemical Engineering Anqing Normal University School of Chemistry and Chemical Engineering Anhui University of Technology

Developing highly efficient and cost-effective electrocatalysts for hydrogen evolution reaction（HER） is grandly challenging in alkaline and alkaline seawater electrolytes. Herein, the asymmetric interfacial active sites with Ru nanoparticles and Ni single atoms in Ru/Ni-N-C were designed through a solvothermal-pyrolysis process. Constructing highly asymmetric interfacial active sites with a strong electron delocalization effect significantly improves HER kinetics. As expected, Ru/Ni-N-C requires low overpotentials with around 20 mV at 10 mA cm-2and robust durability over 48 h in alkaline and alkaline seawater *** at 200 mA cm-2, the overpotentials are close to 100 mV in both above electrolytes for Ru/Ni-N-C. Density function theory calculation results suggest that the asymmetric interface between Ru nanoparticle and Ni-N-C could accelerate the dissociation of water molecules and modulate the hydrogen species, consequently improving the HER performances. This work opens a unique approach for constructing advanced materials for energy conversion.

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Effects of Si/Al,Na/Al and H_(2)O/Na_(2)O molar ratios on formaldehyde barrier properties of inorganic aluminosilicate coatings

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1868-1874页

作者： Shan-xia Xiong Jian-lei Kuang Qian-fang Zheng ting Xiao Wen-xiu Liu Qi Wang Peng Jiang Wen-bin cao Department of Inorganic Nonmetallic Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Wood-based panels containing urea-formaldehyde resin result in the long-term release of formaldehyde and threaten human *** this study,inorganic aluminosilicate coatings prepared by combining metakaolin,silica fume,NaOH,and H_(2)O were applied to the surfaces of wood-based panels to obstruct formaldehyde *** Si/Al,Na/Al,and H_(2)O/Na_(2)O molar ratios of the coatings were regulated to investigate their effects on the structure and formaldehyde-resistant barrier properties of *** showed that the cracks in the coatings gradually disappeared and the formaldehyde resistance rates of the barrier increased as the Si/Al molar ratio was increased from 1.6 to *** value also increased as the Na/Al molar ratio was increased from 0.9 to 1.2 because of the improvement of the degree of *** the H_(2)O/Na_(2)O molar ratio was increased from 12 to 15,the thickness of the dry film decreased gradually and led to the reduction in the formaldehyde resistance *** the Si/Al,Na/Al,and H_(2)O/Na_(2)O molar ratios were 2.2,1.2,and 12,respectively,the inorganic aluminosilicate coating showed good performance as a formaldehyde-resistant barrier and its formaldehyde resistance rate could reach up to 83.2%.

关键词： aluminosilicate coating chemical composition formaldehyde barrier properties

On a Problem of Hornik

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Acta Mathematica Sinica,English Series 2015年第7期31卷 1141-1148页

作者： ting Fan XIE Fei Long cao Department of Mathematics and Information Sciences China Jiliang University

In 1991, Hornik proved that the collection of single hidden layer feedforward neural net- works （SLFNs） with continuous, bounded, and non-constant activation function a is dense in C（K） where K is a compact set in Rs （see Neural Networks, 4（2）, 251-257 （1991））. Meanwhile, he pointed out ＂Whether or not the continuity assumption can entirely be dropped is still an open quite challenging problem＂. This paper replies in the affirmative to the problem and proves that for bounded and continuous almost everywhere （a.e.） activation function σ on R, the collection of SLFNs is dense in C（K） if and only if a is un-constant a.e..

关键词： Neural networks approximation activation function

The Ridge Function Representation of Polynomials and an Application to Neural Networks

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2169-2176页

作者： ting Fan XIE Fei Long cao Department of Information and Mathematics Sciences China Jiliang University Hangzhou 310018 P. R. China

The first goal of this paper is to establish some properties of the ridge function representation for multivariate polynomials, and the second one is to apply these results to the problem of approximation by neural networks. We find that for continuous functions, the rate of approximation obtained by a neural network with one hidden layer is no slower than that of an algebraic polynomial.

关键词： Ridge function neural network polynomial approximation

The Rate of Approximation of Gaussian Radial Basis Neural Networks in Continuous Function Space

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Acta Mathematica Sinica,English Series 2013年第2期29卷 295-302页

作者： ting Fan XIE Fei Long cao Institute of Metrology and Computational Science China Jiliang University

There have been many studies on the dense theorem of approximation by radial basis feedforword neural networks, and some approximation problems by Gaussian radial basis feedforward neural networks （GRBFNs） in some special function space have also been investigated. This paper considers the approximation by the GRBFNs in continuous function space. It is proved that the rate of approximation by GRNFNs with nd neurons to any continuous function f defined on a compact subset K R^d can be controlled by w（f, n^-1/2）, where w（f, t） is the modulus of continuity of the function f.

关键词： Gaussian radial basis feedforward neural networks approximation rate of convergence modulus of continuity

Negative regulation of miRNA-9 on oligodendrocyte lineage gene 1 during hypoxic-ischemic brain damage

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Neural Regeneration Research 2014年第5期9卷 513-518页

作者： Lijun Yang Hong Cui ting cao Department of Pediatrics Beijing Friendship HospitalCapital Medical University

Oligodendrocyte lineage gene 1 plays a key role in hypoxic-ischemic brain damage and myelin repair, miRNA-9 is involved in the occurrence of many related neurological disorders. Bioin- formatics analysis demonstrated that miRNA-9 complementarily, but incompletely, bound oligodendrocyte lineage gene 1, but whether miRNA-9 regulates oligodendrocyte lineage gene 1 remains poorly understood. Whole brain slices of 3-day-old Sprague-Dawley rats were cultured and divided into four groups： control group; oxygen-glucose deprivation group （treatment with 8% O2 ＋ 92% N2 and sugar-free medium for 60 minutes）; transfection control group （after oxygen and glucose deprivation for 60 minutes, transfected with control plasmid） and miRNA-9 transfection group （after oxygen and glucose deprivation for 60 minutes, transfected with miRNA-9 plasmid）. From the third day of transfection, and with increasing culture days, oligodendrocyte lineage gene 1 expression increased in each group, peaked at 14 days, and then decreased at 21 days. Real-time quantitative PCR results, however, demonstrated that oligoden- drocyte lineage gene 1 expression was lower in the miRNA-9 transfection group than that in the transfection control group at 1, 3, 7, 14, 21 and 28 days after transfection. Results suggested that miRNA-9 possibly negatively regulated oligodendrocyte lineage gene 1 in brain tissues during hypoxic-ischemic brain damage.

关键词： nerve regeneration brain injury miRNA-9 oligodendrocyte lineage gene 1 hypox- ic-ischemic brain damage premature birth brain slice culture NSFC grant neural regeneration

Noninvasive imaging of hepatocellular carcinoma: From diagnosis to prognosis

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World Journal of Gastroenterology 2018年第22期24卷 2348-2362页

作者： Han-Yu Jiang Jie Chen Chun-Chao Xia Li-Kun cao ting Duan bin Song Department of Radiology Sichuan University West China Hospital

Hepatocellular carcinoma(HCC) is the most common primary liver cancer and a major public health problem worldwide. Hepatocarcinogenesis is a complex multistep process at molecular, cellular, and histologic levels with key alterations that can be revealed by noninvasive imaging modalities. Therefore, imaging techniques play pivotal roles in the detection, characterization, staging, surveillance, and prognosis evaluation of HCC. Currently, ultrasound is the first-line imaging modality for screening and surveillance purposes. While based on conclusive enhancement patterns comprising arterial phase hyperenhancement and portal venous and/or delayed phase wash-out, contrast enhanced dynamic computed tomography and magnetic resonance imaging(MRI) are the diagnostic tools for HCC without requirements for histopathologic confirmation. Functional MRI techniques, including diffusion-weighted imaging, MRI with hepatobiliary contrast agents, perfusion imaging, and magnetic resonance elastography, show promise in providing further important information regarding tumor biological behaviors. In addition, evaluation of tumor imaging characteristics, including nodule size, margin, number, vascular invasion, and growth patterns, allows preoperative prediction of tumor microvascular invasion and patient prognosis. Therefore, the aim of this article is to review the current state-of-the-art and recent advances in the comprehensive noninvasive imaging evaluation of HCC. We also provide the basic key concepts of HCC development and an overview of the current practice guidelines.

关键词： Magnetic resonance imaging Surveillance Computed tomography Staging Ultrasound Guidelines Diagnosis Hepatocellular carcinoma Prognosis

Plane Analysis for an Inclusion in ID Hexagonal Quasicrys tai Using the Hyp er singular Integral Equation Method

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Acta Mechanica Solida Sinica 2019年第2期32卷 249-260页

作者： Fei Lou ting cao Taiyan Qin Chunhui Xu College of Science China Agricultural University Beijing 100083 China College of Engineering China Agricultural University Beijing 100083 China

A model of a thin elastic inclusion embedded in an infinite ID hexagonal quasicrystal is discussed. The atomic arrangements of the matrix and the inclusion are both periodic along the xi-direction and quasiperiodic along the a;2-direction in the oxiX2-coordinate system. Using the hypersingular integral equation method, the inclusion problem is reduced to solving a set of hypersingular integral equations. Based on the exact analytical solution of the singular phonon and phason stresses near the inclusion front, a numerical method of the hypersingular integral equation is proposed using the finite-part integral method. Finally, the numerical solutions for the phonon and phason stress intensity factors of some examples are given.

关键词： Elastic inclusion ID hexagonal quasicrystal Hypersingular integral equations

Hot Corrosion Resistance of TB8 Titanium Alloy after ECAP and Heat Treatment

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1440-1448页

作者： LI Shuaidi XU Xiaojing BAI Xiang cao bin Institute of Advanced Manufacturing and Modern Equipment Technology Jiangsu UniversityZhenjiang 212013China

The metastableβtitanium alloy TB8(Ti-12.76Mo-2.13Nb-2.73A1-0.16Si)was used as the original material,and the secondary processing method combining equal channel angular pressing(ECAP)and heat treatment was *** the help of optical microscope(OM),scanning electron microscope(SEM)and X-ray diffractometer(XRD),the corrosion behavior of TB8 titanium alloy after different secondary processing(800℃/850℃solid solution-520℃aging,ECAP-800℃/850℃solid solution-520℃aging,and800℃/850℃solid solution-ECAP-520℃aging)was *** experimental results show that the hot corrosion products of the six samples are similar,mainly Na_(2)Si_(2)O_(5),MoS_(2),TiCl_(2),Ti(SO_(4))_(2),and *** to the grains of the TB8 titanium alloy treated by 850℃solid solution-ECAP-520℃aging are obviously refined,the surface structure is the most smooth and dense,forming a continuous Al2O3protective film,and the surface defects are the least after *** corrosion layer thickness is the lowest(102.3μm),only 36.5%-81.4%of that of other secondary processing titanium *** addition,the corrosion kinetics curves of the six materials all follow parabolic laws,and the minimum corrosion weight gain of the samples after 850℃solutionECAP-520℃aging treatment is 0.7507 mg·mm^(-2),showing better hot corrosion resistance.

关键词： TB8 ECAP heat treatment hot corrosion resistance