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Persistent Homology for the Quantitative Analysis of the Structure and Stability of Carboranes

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Chinese Journal of Structural Chemistry 2020年第6期39卷 999-1008页

作者： CHEN Dong ZHANG Ming-Zheng CHEN Hai-Biao xie zuo-wei wei Guo-wei PAN Feng School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055China Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of HongKongShatinNew TerritoriesHong KongChina Department of Mathematics Michigan State UniversityMI 48824 USA Department of Electrical and Computer Engineering Michigan State UniversityMI 48824USA Department of Biochemistry and Molecular Biology Michigan State UniversityMl 48824USA

Persistent homology is a powerful and novel tool for quantifying the inherent topological features of structure. In this work, we used the persistent homology for the first time to study the closo-carboranes C2Bn-2Hn(n = 5~20) and their parent structures closo-boranes dianions BnHn2-(n = 5~20), where multiple elements are present. All these structures are first investigated with the standard Vitoris-Rips complex. We interpret all barcodes representation and associate them with structural details. By means of average bar length, a linear regression model was established to construct the relationship between persistent homology features and molecular stability, which was expressed by the relative energies. For closo-boranes dianions, we only use B atom set since B and H atoms are in pairs. The average lengths of β0, β1 and β2 bars are used as the features for linear regression, and excellent correlation coefficient(0.977) between the values predicted by persistent homology and those by quantum calculations was achieved. For closo-carboranes, C–B atom set(ignore the differences in the atoms), B atom set and C atom set were considered to get the persistent homology features(since there were only two C atoms in C2Bn-2Hn, only β0 bars were considered), and seven average bar lengths were calculated, respectively. Pearson coefficient of 0.937 was obtained. We found that the stability of carboranes showed a high linear correlation with the characteristics generated from topological bars in H0, H1 and H2. The results show that the topological information generated by persistent homology can be extended and applied to multi-element systems.

关键词： topology persistent homology carboranes filtration stability relative energy

The Cold Vortex Circulation over Northeastern China and Regional Rainstorm Events

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Atmospheric and Oceanic Science Letters 2012年第2期5卷 134-139页

作者： xie zuo-wei Bueh Cholaw Ji Li-Ren Sun Shu-Qing International Center for Climate and Environment Science (ICCES) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

In this study,regional rainstorm events (RREs) in northeastern China associated with the activity of the Northeastern China Cold Vortex (NCCV) were investigated on a medium-range time *** RREs occurring in northeastern China could be categorized into three groups according to the distribution of heavy *** largest cluster is characterized by the rainstorm events that occur on the northwestern side of the Changbai Mountains along a southwest-northeast *** events occur most frequently during the post-meiyu *** authors place particular emphasis on the RREs that belong to the largest cluster and are closely associated with the activity of the *** RREs were preconditioned by the transportation of substantial amounts of water vapor to which the anomalous western Pacific subtropical high (WPSH) *** attendant anomalous WPSH was primarily driven by the anomalous transient eddy feedback forcing the nearby East Asian *** development of the NCCV circulation was concurrent with the RREs and acted as their primary causative factor.A perspective based on low-frequency dynamics indicates that Rossby wave packets emanated from the blocking-type circulation over northeastern Asia led to the development of the NCCV activity.

关键词： rainstorm northeastern China cold vortex Rossby wave

Copolymerization of Ethylene with o-Carborane Bearing α-Olefins Catalyzed by Titanium Complexes Containing Tridentate[O-NSR] Ligands

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Copolymerization of Ethylene with o-Carborane Bearing α-Ole...

Titanium Imido Complexes and Their Applications in Hydroamination of Alkynes

第十七届全国金属有机化学学术讨论会

作者： wei,Bing SUN,Xiu-Li TANG,Yong xie,zuo-wei State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Department of Chemistry The Chinese University of Hong Kong

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Titanium Imido Complexes and Their Applications in Hydroamin...

Design and test of cesium atomic concentration detection system based on TDLAS*1

中国化学会第四届有机化学学术会议

作者： xie, zuo-wei (Department of Chemistry, the Chinese University of Hong Kong, Shatin, New Territories, Hong Kong)

＜正＞Group 4 metal imido complexes have attracted considerable interests in the past decade. These complexes are finding many applications in C-H activation, [2+2] cycloadditions, catalytic hydroamination of alkynes and imido group transfer reactions. A wide range of ancilliary ligands has been used to support the M=NR unit. However, group 4 metal imido complexes with constrained-geometry ligands have not been reported in the literature yet. It has been well documented that the constrained-geometry ligands can offer group 4 metals very high activities

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Optoelectronics Letters 2025年第3期21卷 167-171页

作者： LIANG Lizhen LIU Shanhu WU Yong wei Jianglong xie Yahong Hefei Institutes of Physical Science Chinese Academy of Sciences School of Science Shandong Jianzhu University School of Electronic and Information Engineering Anhui Jianzhu University

In order to better build the neutral beam injector with negative ion source (NNBI), the pre-research on key technologies has been carried out for the comprehensive research facility for fusion technology (CRFFT). Cesium seeding into negative-ion sources is a prerequisite to obtain the required negative hydrogen ion. The performance of ion source largely depends on the cesium conditions in the source. It is very necessary to quantitatively measure the amount of cesium in the source during the plasma on and off periods (vacuum stage).

关键词： A

Phase changes and electromagnetic wave absorption performance of XZnC(X=Fe/Co/Cu)loaded on melamine sponge hollow carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 566-577页

作者： Xiubo xie Ruilin Liu Chen Chen Di Lan Zhelin Chen wei Du Guanglei Wu School of Environmental and Material Engineering Yantai UniversityYantai 264005China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Shandong University of AeronauticsBinzhou 256603China Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Non-stoichiometric carbides have been proven to be effective electromagnetic wave(EMW)absorbing *** this study,phase and morphology of XZnC(X=Fe/Co/Cu)loaded on a three dimensional(3D)network structure melamine sponge(MS)carbon composites were investigated through vacuum filtration followed by *** FeZnC/CoZnC/CuZnC with carbon nanotubes(CNTs)were uniformly dispersed on the surface of melamine sponge carbon skeleton and Co-containing sample exhibits the highest CNTs *** minimum reflection loss(RL_(min))of the CoZnC/MS composite(m_(composite):m_(paraffin)=1:1,m represents mass)reached-33.60 dB,and the effective absorption bandwidth(EAB)reached 9.60 *** outstanding electromagnetic wave absorption(EMWA)properties of the CoZnC/MS composite can be attributed to its unique hollow structure,which leads to multiple reflections and *** formed conductive network improves dielectric and conductive *** incorporation of Co enhances the magnetic loss capability and optimizes interfacial polarization and dipole *** simultaneously improving dielectric and magnetic losses,ex-cellent impedance matching performance is *** clarification of element replacement in XZnC/MS composites provides an effi-cient design perspective for high-performance non-stoichiometric carbide EMW absorbers.

关键词： electromagnetic wave absorption three dimensional network structure melamine sponge derived carbon non-stoichiometric carbide

Stiffness-tunable biomaterials provide a good extracellular matrix environment for axon growth and regeneration

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Neural Regeneration Research 2025年第5期20卷 1364-1376页

作者： Ronglin Han Lanxin Luo Caiyan wei Yaru Qiao Jiming xie Xianchao Pan Juan Xing Department of Pathophysiology School of Basic Medical SciencesSouthwest Medical UniversityLuzhouSichuan ProvinceChina Department of Medicinal Chemistry School of PharmacySouthwest Medical UniversityLuzhouSichuan ProvinceChina

Neuronal growth, extension, branching, and formation of neural networks are markedly influenced by the extracellular matrix—a complex network composed of proteins and carbohydrates secreted by cells. In addition to providing physical support for cells, the extracellular matrix also conveys critical mechanical stiffness cues. During the development of the nervous system, extracellular matrix stiffness plays a central role in guiding neuronal growth, particularly in the context of axonal extension, which is crucial for the formation of neural networks. In neural tissue engineering, manipulation of biomaterial stiffness is a promising strategy to provide a permissive environment for the repair and regeneration of injured nervous tissue. Recent research has fine-tuned synthetic biomaterials to fabricate scaffolds that closely replicate the stiffness profiles observed in the nervous system. In this review, we highlight the molecular mechanisms by which extracellular matrix stiffness regulates axonal growth and regeneration. We highlight the progress made in the development of stiffness-tunable biomaterials to emulate in vivo extracellular matrix environments, with an emphasis on their application in neural repair and regeneration, along with a discussion of the current limitations and future prospects. The exploration and optimization of the stiffness-tunable biomaterials has the potential to markedly advance the development of neural tissue engineering.

关键词： alginate axon growth biomaterials extracellular matrix neural repair neurons neuroregeneration polyacrylamide polydimethylsiloxane stiffness

Optimizing electronic structure through point defect engineering for enhanced electrocatalytic energy conversion

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Green Energy & Environment 2025年第1期10卷 109-131页

作者： wei Ma Jiahao Yao Fang xie Xinqi Wang Hao Wan Xiangjian Shen Lili Zhang Menggai Jiao Zhen Zhou Interdisciplinary Research Center for Sustainable Energy Science and Engineering(IRC4SE2) School of Chemical EngineeringZhengzhou UniversityHenan450001China

Point defect engineering endows catalysts with novel physical and chemical properties,elevating their electrocatalytic *** introduction of defects emerges as a promising strategy,effectively modifying the electronic structure of active *** optimization influences the adsorption energy of intermediates,thereby mitigating reaction energy barriers,altering paths,enhancing selectivity,and ultimately improving the catalytic efficiency of *** elucidate the impact of defects on the electrocatalytic process,we comprehensively outline the roles of various point defects,their synthetic methodologies,and characterization ***,we consolidate insights into the relationship between point defects and catalytic activity for hydrogen/oxygen evolution and CO_(2)/O_(2)/N_(2) reduction reactions by integrating mechanisms from diverse *** underscores the pivotal role of point defects in enhancing catalytic *** last,the principal challenges and prospects associated with point defects in current electrocatalysts are proposed,emphasizing their role in advancing the efficiency of electrochemical energy storage and conversion materials.

关键词： Point defect engineering Doping Vacancy Electrocatalysis Electronic structure

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点接触转轴式“电流间相互作用”演示装置

物理实验 2006年第6期26卷 31-32页

作者：谢作为翔宇教育集团监利中学湖北监利433300

为了演示“电流间通过磁场发生相互作用”实验,使用导线、铜片等简易材料设计并制作了点接触转轴式“电流间相互作用”演示装置,并介绍了可选的电源和电路.

关键词：电流间相互作用磁场演示实验