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RIGIDITY AND QUANTITATIVE STABILITY FOR PARTIALLY OVERDETERMINED PROBLEMS AND CAPILLARY CMC HYPERSURFACES

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arXiv 2023年

作者： Jia, xiaohan Lu, Zheng xia, Chao Zhang, xuwen School of Mathematics Southeast University Nanjing211189 China School of Mathematical Sciences Xiamen University Xiamen 361005 China Mathematisches Institut Albert-Ludwigs-Universität Freiburg 79104 Germany Institut für Mathematik Goethe-Universität Frankfurt60325 Germany

In this paper, we first prove a rigidity result for a Serrin-type partially overdetermined problem in the half-space, which gives a characterization of capillary spherical caps by the overdetermined problem. In the second part, we prove quantitative stability results for the Serrin-type partially overdetermined problem, as well as capillary almost constant mean curvature hypersurfaces in the half-space. Copyright © 2023, The Authors. All rights reserved.

关键词： Rigidity

Heavy Metal Distribution and Microbial Diversity of the Surrounding Soil and Tailings of Two Cu Mines in China

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WATER AIR AND SOIL POLLUTION 2023年第4期234卷 241-241页

作者： xia, Yu Liu, Jing Chang, Jie Li, Weijia xia, Kaiyu Liu, Zilong Liu, Yizhen He, xuwen China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China China Natl Gold Grp Co Ltd Beijing 100011 Peoples R China

Mining activities can cause heavy metal pollution which affects soil microbial diversity. Current understanding on the impact of Cu mines especially that of bioavailable heavy metals on microbial communities is still limited. This study investigated heavy metal distribution and microbial diversity of the surrounding soil and tailings of two Cu mines from Tibet (JM) and Zhejiang (JD), China. Cu, Pb, Zn, and Cr concentrations in the soil around JM were 107.33 +/- 75.48, 29.21 +/- 19.66, 73.89 +/- 28.79, and 17.88 +/- 4.91 mg center dot kg(-1), respectively, and those of JD were 40.59 +/- 21.86, 27.00 +/- 19.40, 95.45 +/- 54.36, and 30.87 +/- 11.55 mg center dot kg(-1), respectively. For each mine, the sites closer to the mining area displayed higher PINemerow values and acid extractable contents of Cu (Cu-_AE), Zn (Zn-_AE), and Pb (Pb-_AE). The tailings samples showed lower microbial diversity and higher abundances of heavy metal-resistant organisms including the ones from the phyla Firmicutes and Bacteroidetes and the genera Bacteroides, Lactobacillus, and Staphylococcus than the surrounding soil samples. Canonical corresponding analysis (CCA) revealed that water content, altitude, electrical conductivity (EC), total concentration of Zn (Zn-_total), Cu-_AE, Zn-_AE, and Pb-_AE, and pH value were effective environmental factors shaping the structure of all the investigated communities. Acid extractable contents of Pb and Zn rather than their total concentrations were significantly correlated to JM surrounding soil microbial structure. Microbial structure differentiations of the surrounding soil of JM and JD were largely attributed to stochastic processes, suggested by the beta nearest taxon index (beta NTI).

关键词： Acid extractable fraction Cu mine Effective factors Heavy metal Microbial communities

DNA mismatch repair in HIV-Associated Lymphoma: Lost in Translation?

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JOURNAL OF INFECTION 2024年第3期88卷 106112-106112页

作者： Jiang, Yuanhui Chen, Suling xia, Muye Xu, xuwen Peng, Jie Cai, Shaohang Southern Med Univ Nanfang Hosp Dept Infect Dis Guangzhou 510515 Peoples R China

Attribute Reduction Method Using Adaptive Genetic Algorithm and Particle Swarm Optimization 2021

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Attribute Reduction Method Using Adaptive Genetic Algorithm ...

7th International Conference on Computing and Artificial Intelligence, ICCAI 2021

作者： Wu, Shangzhi Zhang, Fan Wang, xuwen xia, Ning Northwest Normal University College of Computer Science and Engineering Lanzhou China

ISBN: (纸本)9781450389501

Attribute reduction is one of the core contents in rough set knowledge discovery, how to find the minimal attribute reduction, proposes an attribute reduction method using adaptive Genetic Algorithm(GA) and Particle Swarm Optimization(PSO). On the basis of the condition attributes for decision attribute support degree, the method reset the fitness function, can dynamically adjust the parameters of the function, thus to ensure the obtained results for minimal reduction, combined with the genetic algorithm of adaptive crossover and mutation operation, to ensure that the particles in the feasible solution can be fully retain and use, the method to strengthen the local search ability at the same time, but also keep the global search ability. Experiments results show that the method has obvious advantages in solving the minimum attribute reduction. © 2021 ACM.

关键词： Genetic algorithms

Controlled Anodic Decomposition Pathway of Supramolecular Lithium Borate for Rationally Tuned Interphase Chemistry

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2025年第19期64卷 e202500425页

作者： Zhou, Haiyu Hou, Wenhui Zhu, Da Zhou, Pan Peng, xuwen Liu, Zhi Yan, Shuaishuai Lu, Yang Ou, Yu Liu, Fengxiang xia, Yingchun Liu, Hao Cao, Qingbin Song, Xuan Guo, Decai Xu, Hong Liu, Kai Tsinghua Univ Dept Chem Engn State Key Lab Chem Engn Beijing 100084 Peoples R China Tsinghua Univ Inst Nucl & New Energy Technol Beijing 100084 Peoples R China SINOPEC Dalian Res Inst Petr & Petrochem 96 Nankai RdTieshan St Dalian 116045 Liaoning Peoples R China

The rational tailoring and molecular-level engineering of stable cathode-electrolyte interphases (CEIs) is paramount to advancing the performance of next-generation high-energy, layered nickel-rich oxide-based lithium metal batteries. However, developing well-tailored electrolyte additives with rationally controlled interfacial chemistry remains highly challenging. Here, two lithium borates: lithium (2-methoxy-15-crown-5)trifluoroborate (C-LiMCFB) and lithium (15-methoxy-2,5,8,11,14-pentaoxahexadecan)trifluoroborate (L-LiMCFB), incorporating cyclic 15-crown-5 (15C5) and linear pentaethylene glycol monomethyl ether (PEGME) as respective host groups tethered to the boron center are designed and synthesized. In C-LiMCFB, the supramolecular polydentate chelation/de-chelation of the 15C5 with Li+ can sequentially deactivate/activate the anodic decomposition of the C & horbar;O bonds, therefore leading to the controlled cleavage pathway of B & horbar;O and C & horbar;O bonds. The controlled interfacial chemistry leads to the formation of a uniform CEI layer, rich in lithium boron-oxygen clusters interwoven with LiF, on the NCM811 surface. This novel CEI configuration demonstrates an exceptional balance of mechanical robustness, adhesiveness, and toughness, providing highly desirable protection for the NCM811 cathode. The discovery of these novel supramolecular boron-based lithium salts not only unlocks supramolecular chemistry for rational electrolyte tuning but also provides a deeper understanding of the CEI formation mechanism in high-energy lithium metal batteries.

关键词： Battery electrolytes Energy storage Lithium metal batteries Supramolecular chemistry

A HEINTZE-KARCHER TYPE INEQUALITY FOR HYPERSURFACES WITH CAPILLARY BOUNDARY

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arXiv 2022年

作者： Jia, xiaohan xia, Chao Zhang, xuwen School of Mathematical Sciences Xiamen University Xiamen361005 China

In this paper, we establish a Heintze-Karcher type inequality for hypersurfaces with capillary boundary of contact angle θ ∈ (0, π/2) in a half space or a half ball, by using solution to a mixed boundary value problem in Reilly type formula. Consequently, we give a new proof of Alexandrov type theorem for embedded capillary constant mean curvature hypersurfaces with contact angle θ ∈ (0, π/2) in a half space or a half *** Codes 53C24, 35J25, 53C21 Copyright © 2022, The Authors. All rights reserved.

关键词： Contact angle

Interphasial Chemistry Design for Seamless Lithium Deposition in Anode-Free Lithium Metal Batteries

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ADVANCED MATERIALS 2025年

作者： Song, Xuan Liu, Cheng Zhang, Aiyuan Ding, Li Zeng, Tianyou Lu, Yang Ou, Yu Hou, Wenhui Zhou, Pan Cao, Qingbin Yan, Shuaishuai Liu, Zhi Peng, xuwen Zhou, Haiyu xia, Yingchun Zhang, Weili Liu, Hao Liu, Kai Tsinghua Univ Dept Chem Engn Beijing 100084 Peoples R China China Acad Space Technol Beijing 100094 Peoples R China Beijing Mingyuan Space Elect Informat Technol Co L Beijing 100080 Peoples R China Tsinghua Univ Hefei Inst Publ Safety Res Hefei 230601 Peoples R China

Anode-free lithium metal batteries (AFLMBs) are promising due to ultrahigh energy density, reduced manufacturing costs, and enhanced safety through active lithium elimination. However, their practical implementation remains challenged by unstable electrode-electrolyte interfaces and the resulting rapid active species depletion. Herein, an ultrathin ion-conducting membrane (ICM) is designed, featuring uniformly distributed rigid benzenesulfonimide anionic groups and flexible lithiophilic groups containing ether oxygen groups. The constrained benzenesulfonimide anions enable exceptional charge separation and reduced spatial resistance, boosting lithium-ion mobility, while the integrated lithophilic network directs lateral lithium deposition through ionic nanochannels. This ICM layer effectively promotes the enrichment of anions at the interface and constructs stable anion-derived solid electrolyte interphases (SEI). Meanwhile, ICM layers with electron-insulating and ion-conducting properties can further prevent side reactions, and suppress dendritic Li growth acting as a natural shield, resulting in seamless lithium deposition. Specifically, the Li||Cu coin cells with ICM achieve 99.82% Coulombic efficiency. The AFLMBs assembled with ICM-coated copper foil (ICM Cu) and NCM811 deliver an energy density of 495 Wh kg-1 with 80.72% capacity retention after 100 cycles. The interphasial chemistry design strategy provides insights into the precise interfacial engineering to realize high-performance, high-safety battery systems and facilitates their development for practical applications.

关键词： anode-free lithium metal batteries dendrite suppression interphasial chemistry ion-conducting membranes solid electrolyte interphases

HEINTZE-KARCHER INEQUALITY AND CAPILLARY HYPERSURFACES IN A WEDGE

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arXiv 2022年

作者： Jia, xiaohan Wang, Guofang xia, Chao Zhang, xuwen School of Mathematics Southeast University Nanjing211189 China Mathematisches Institut Universität Freiburg Ernst-Zermelo-Str.1 Freiburg79104 Germany School of Mathematical Sciences Xiamen University Xiamen361005 China

In this paper, we utilize the method of Heintze-Karcher to prove a "best" version of Heintze-Karcher-type inequality for capillary hypersurfaces in the half-space or in a wedge. One of new crucial ingredients in the proof is modified parallel hypersurfaces which are very natural to be used to study capillary hypersurfaces. A more technical part is a subtle analysis along the edge of a wedge. As an application, we classify completely embedded capillary constant mean curvature hypersurfaces that hit the edge in a wedge, which is a subtler *** Codes 53C24, 35J25, 53C21 Copyright © 2022, The Authors. All rights reserved.

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ALEXANDROV’S THEOREM FOR ANISOTROPIC CAPILLARY HYPERSURFACES IN THE HALF-SPACE

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arXiv 2022年

作者： Jia, xiaohan Wang, Guofang xia, Chao Zhang, xuwen School of Mathematical Sciences Xiamen University Xiamen361005 China Mathematisches Institut Universität Freiburg Ernst-Zermelo-Str.1 Freiburg79104 Germany

In this paper, we show that any embedded capillary hypersurface in the half-space with anisotropic constant mean curvature is a truncated Wulff shape. This extends Wente’s result [32] to the anisotropic case and He-Li-Ma-Ge’s result [15] to the capillary boundary case. The main ingredients in the proof are a new Heintze-Karcher inequality and a new Minkowski formula, which have their own *** Codes 53C24, 35J25, 53C21 Copyright © 2022, The Authors. All rights reserved.

关键词： Anisotropy