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Semi-derived Ringel-Hall algebras and Hall algebras of odd-periodic relative derived categories

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Science China Mathematics 2024年第8期67卷 1735-1760页

作者： ji lin Liangang Peng Department of Mathematics and Statistics Fuyang Normal UniversityFuyang 236037China School of Mathematics Sichuan UniversityChengdu 610064China

Let t be a positive integer and A be a hereditary abelian category satisfying some finiteness *** define the semi-derived Ringel-Hall algebra of A from the category C_(Z/t)(A)of Z/t-graded complexes and obtain a natural basis of the semi-derived Ringel-Hall ***,we describe the semiderived Ringel-Hall algebra by the generators and defining *** particular,if t is an odd integer,we show an embedding of the derived Hall algebra of the odd-periodic relative derived category in the extended semi-derived Ringel-Hall algebra.

关键词： hereditary abelian categories the categories of Z/t-graded complexes semi-derived Ringel-Hall algebras derived Hall algebras

Achieving both high reversible and stable Zn anode by a practical glucose electrolyte additive toward highperformance Zn-ion batteries

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Rare Metals 2022年第2期41卷 356-360页

作者： Ming song Cheng-lin Zhong College Materials and Chemical Engineering Xuzhou University of TechnologyXuzhou 221018China College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276000China

Aqueous Zn-ion batteries(ZIBs)featuring safety,affordability and high energy density may provide a promising solution to the demand for better energy storage *** with high electrochemical performances rely on a stable and reversible Zn metal negative *** side reactions such as the hydrogen evolution reaction(HER)at the anode-electrolyte interface are responsible for the low reversibility,and uneven Zn deposition/dissolution gives rise to the instability of Zn ***,a facile and scalable method of regulating electrolytes has been proposed by Chao and his co-works through adding a lowcost,safe and environmentally-friendly electrolyte additive:*** calculations and experimental studies reveal that the glucose not only suppresses side reactions by modulating the solvated shell of Zn^(2+)but also homogenizes Zn deposition/dissolution through forming a special local absorption *** bi-functional electrolyte additive endows the Zn anode with both high reversibility and stability,which efficiently improves the performances of *** work explores a promising electrolyte strategy for realizing the large-scale application of ZIBs.

关键词： electrolyte additive anode

A Free Surface Sharpening Strategy Using Optimization Method

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Journal of Thermal Science 2015年第6期24卷 544-548页

作者： song Hongchao ji Lucheng TU Shuangzhang School of Aerospace Engineering Beijing Institute of Technology Department of Computer Engineering Jackson State University

VOF method which consists in transporting a discontinuous marker variable is widely used to capture the free surface in computational fluid *** is numerical dissipation in simulations involving the transport of the *** dissipation makes the free surface lose its physical nature.A free surface sharpening strategy based on optimization method is presented in the *** strategy can keep the location of the free surface and local mass conservation at both time,and can also keep free surface in a constant *** is independent on the types of solvers and *** famous cases were chosen for verifying the free surface sharpening strategy *** show that the strategy has a very good performance on keeping local mass *** efficiency of prediction of the free surface is improved by applying the *** modeling of flow details such as drops can also be captured by this method.

关键词： VOF free surface sharpening optimization method local mass conservation

Influence of Water Vapor on Silica Membrane： Adsorption Properties and Percolation Effect

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Chinese Journal of Chemical Physics 2015年第3期28卷 345-350,I0002页

作者： Chun-lin song Gang Liu Faculty of Materials and Energy Southwest University Chongqing 400715 China Inorganic Membrane Group MESA+ Institute for Nanotechnology Faculty of Science and Technology University of Twente P.O. Box 217 7500 AE Enschede the Netherlands

The influence of water vapor on silica membrane with pore size of ,-4A has been investigated in terms of adsorption properties and percolation effect at 50 and 90 ℃. Two methods are employed： spectroscopic ellipsometry for water vapor adsorption and gas permeation of binary mixture of helium and H2O The adsorption behaviors on the silica membrane comply with the first-order Langmuir isotherm. The investigation demonstrates that helium flux through the silica membrane decreases dramatically in presence of H20 molecules. The transport of gas molecules through such small pores is believed not to be continuous any more, whereas it is reasonably assumed that the gas molecules hop from one occupied site to another unoccupied one under the potential gradient. When the coverage of H20 molecules on the silica surface increases, the dramatic decrease of helium flux could be related to percolation effect, where the adsorbed H20 molecules on the silica surface block the hopping of helium molecules.

关键词： Silica membrane Percolation effect Adsorption

Structural insight into enhanced calcium indicator GCaMP3 and GCaMPJ to promote further improvement

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Protein & Cell 2013年第4期4卷 299-309页

作者： Yingxiao Chen Xianqiang song Sheng Ye lin Miao Yun Zhu Rong-Guang Zhang Guangju ji National Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China

Genetically encoded Ca^(2+) indicators(GECI)are important for the measurement of Ca^(2+) in ***2,a widelyused GECI,has recently been iteratively *** the improved variants,GCaMP3 exhibits significantly better fluorescent *** this study,we developed a new GECI called GCaMPJ and determined the crystal structures of GCaMP3 and *** has a 1.5-fold increase in fl uorescence and 1.3-fold increase in calcium affi nity over *** Ca^(2+) binding,GCaMP3 exhibits both monomeric and dimeric *** structural superposition of these two forms reveals the role of Arg-376 in improving monomer ***,GCaMPJ seldom forms dimers under conditions similar to *** ructural and mutagenesis studies on Tyr-380 confi rmed its importance in blocking the cpEGFPβ-barrel *** study proposes an efficient tool for mapping Ca^(2+) signals in intact organs to facilitate the further improvement of GCaMP sensors.

关键词： genetically encoded calcium indicator mu-tants crystal structure fl uorescentintensity dimerization

Evolution of isolated G-band bright points: size, intensity and velocity

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Research in Astronomy and Astrophysics 2014年第6期14卷 741-752页

作者： Yun-Fei Yang jia-Ben lin song Feng Kai-Fan ji Hui Deng Feng Wang Faculty of Information Engineering and Automation/Yunnan Key Laboratory of Computer Technology Application Kunming University of Science and Technology Key Laboratory of Solar Activity National Astronomical Observatories Chinese Academy of Sciences Key Laboratory of Modern Astronomy and Astrophysics Nanjing University Ministry of Education

We study the evolution pattern of isolated G-band bright points （GBPs） in terms of their size, intensity and velocity. Using a high resolution image sequence taken with the Hinode/Solar Optical Telescope （SOT）, we detect GBPs in each image by the Laplacian and Morphological Dilation algorithm, and track their evolutions by a 26-adjacent method in a three-dimensional space-time cube. For quantifying the evolution, we propose a quantification method based on lifetime normalization which aligns the different lifetimes to common stages. The quantification results show that, on average, the diameter of isolated GBPs changes from 166 to 173 km, then down to 165 km; the maximum intensity contrast changes from 1.012 to 1.027, then down to 1.011; however, the velocity changes from 1.709 to 1.593 km s-1, then up to 1.703 km s-i. The results indicate that the evolution follows a pattern such that the GBP is small, faint and fast-moving at the birth stage, becomes big, bright and slow-moving at the middle stage, then gets small, faint and fast-moving at the decay stage until disappearance. Although the differences are very small, a two-sample t-test is used to demonstrate there are significant differences in means between the distri- butions of the different stages. Furthermore, we quantify the relationship between the lifetimes of GBPs and their properties. It is found that there are positive correlations between the lifetimes and their sizes and intensities with correlation coefficients of 0.83 and 0.65, respectively; however, there is a negative correlation between the life- times and velocities with a correlation coefficient of-0.49. In summary, the longer the GBP persists, the bigger, brighter and slower it will be.

关键词： techniques: image processing -- Sun: photosphere -- methods: dataanalysis -- methods: statistical

Layer-wise domain correction for unsupervised domain adaptation

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Frontiers of Information Technology & Electronic Engineering 2018年第1期19卷 91-103页

作者： Shuang LI Shi-ji song Cheng WU Automation Department Tsinghua University

Deep neural networks have been successfully applied to numerous machine learning tasks because of their impressive feature abstraction ***,conventional deep networks assume that the training and test data are sampled from the same distribution,and this assumption is often violated in real-world *** address the domain shift or data bias problems,we introduce layer-wise domain correction(LDC),a new unsupervised domain adaptation algorithm which adapts an existing deep network through additive correction layers spaced throughout the *** the additive layers,the representations of source and target domains can be perfectly *** corrections that are trained via maximum mean discrepancy,adapt to the target domain while increasing the representational capacity of the *** requires no target labels,achieves state-of-the-art performance across several adaptation benchmarks,and requires significantly less training time than existing adaptation methods.

关键词： Unsupervised domain adaptation Maximum mean discrepancy Residual network Deep learning

Synthesis and Characterization of Ferroceneterminated Ruthenium Phenylacetylide Complexes with Alligator Clips

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Chinese Chemical Letters 2003年第1期14卷 35-38页

作者： Heng Wei lin Xian Hong WANG Xiao jiang ZHAO ji LI Fo song WANG State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

Ferrocene-terminated trans-Ru(dppm)2 (dppm=Ph2PCH2PPh2)-containing molecular wires with alligator clips were prepared. They are suitable for self-assembly on gold electrode to investigate the influence of metal incor... 详细信息

关键词： Molecular wires ferrocene ruthenium phenylacetylide complexes.

Rogue Waves in Nonintegrable KdV-Type Systems

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Chinese Physics Letters 2018年第5期35卷 6-9页

作者： Senyue Lou ji lin Physics Department and Ningbo Collaborative Innovation Center of Nonlinear Hazard System of Ocean and Atmosphere Ningbo UniversityNingbo 315211 Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062 Department of Physics Zhejiang Normal UniversityJinhua 321004

It is proved that rogue waves can be found in Korteweg de-Vries（KdV） systems if real nonintegrable effects, higher order nonlinearity and nonlinear diffusion are considered. Rogue waves can also be formed without mo... 详细信息

关键词： Rogue Waves in Nonintegrable KdV-Type Systems