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Sharp Lipschitz constant of bi-Lipschitz automorphism on Cantor set

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Science China Mathematics 2009年第4期52卷 709-719页

作者： XIONG Ying wang lisha XI LiFeng Department of Mathematics South China University of TechnologyGuangzhou 510641China Department of Mathematics Hubei UniversityWuhan 430062China Institute of Mathematics Zhejiang Wanli UniversityNingbo 315100China

Suppose C r = (r C r ) ∪ (r C r + 1 ? r) is a self-similar set with r ∈ (0, 1/2), and Aut(C r ) is the set of all bi-Lipschitz automorphisms on C r . This paper proves that there exists f* ∈ Aut(C r ) such that $$ blip(f*) = inf\{ blip(f) > 1:f \in Aut(C_r )\} = min\left[ {\frac{1} {r},\frac{{1 - 2r^3 - r^4 }} {{(1 - 2r)(1 + r + r^2 )}}} \right], $$ where $ lip(g) = sup_{x,y \in C_r ,x \ne y} \frac{{\left| {g(x) - g(y)} \right|}} {{\left| {x - y} \right|}} $ and blip(g) = max(lip(g), lip(g ?1)).

关键词： fractal bi-Lipschitz automorphism Cantor set 28A80

罗布麻的主要化学成分与作用及其在纺织领域的应用

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毛纺科技 2024年第9期52卷 137-143页

作者：王丽莎胡雪敏青艳吴苹杨慧芳新疆科技学院化工与纺织工程学院新疆库尔勒841000 新疆科技学院功能纤维材料研究中心新疆库尔勒841000

为了充分发掘罗布麻这一植物资源的综合应用价值,对罗布麻的主要化学成分及作用进行了深入剖析,并详细探讨了这些成分在纺织行业的具体应用前景。分析结果显示,罗布麻富含黄酮类、挥发油类、三萜及甾醇类等活性物质,以及多种维生素和矿... 详细信息

为了充分发掘罗布麻这一植物资源的综合应用价值,对罗布麻的主要化学成分及作用进行了深入剖析,并详细探讨了这些成分在纺织行业的具体应用前景。分析结果显示,罗布麻富含黄酮类、挥发油类、三萜及甾醇类等活性物质,以及多种维生素和矿物质,这些成分在抑菌、抗炎、抗氧化等方面展现出了显著的优势,预示着其在纺织领域的巨大应用潜力。此外,还对当前罗布麻在纺织领域应用的研究现状进行了综合评述,并指出了存在的问题,旨在为罗布麻在纺织领域的进一步开发和应用提供有价值的理论参考和实践指导。

关键词：罗布麻化学成分主要作用纺织应用

Dry passivation of austenitic SUS 301L stainless steel against pitting corrosion in marine atmospheric environment

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Journal of Oceanology and Limnology 2022年第4期40卷 1437-1447页

作者： Yonghong LU Xiao LIU lisha wang Jinghong YANG Haibo XU Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China 2 CRRC Changchun Railway Vehicles Co.Ltd.Changchun 130062China

Being an exclusive construction material for lightweight rail vehicles,protection from pitting corrosion in harsh marine atmospheric environment in high humidity and Cl-ion concentration is critical for austenitic SUS 301L stainless steel(SS),especially when it inevitably suff ers from mechanical damages during post ***,an innovative dry passivation method for austenitic SUS 301L SS was established in a closed air atmosphere at low temperature and constant *** process parameters were optimized,and the passivation mechanism was explained using polarization curve,electrochemical impedance spectroscopy(EIS),X-ray photoelectron spectroscopy(XPS),and contact angle *** pitting corrosion susceptibility of the passive fi lm prepared in a closed air chamber under 1.0×10^(5) Pa at 80℃ for 80 min was evaluated in 3.5%NaCl solution and exhibited higher pitting potential and corrosion resistance,lower passivity-maintaining current density,and wettability when compared with conventional nitric acid ***,dry passivation facilitated the repairing of the surface structural defect itself and the post-processing damage,similar to the accelerated aging of fi *** decrease in oxygen concentration and convection-diff usion strengthened the preferential chromium oxidation to form a compact chromium-rich passive fi lm to resist the aggression of Cl-ion.

关键词： austenitic stainless steel passive film dry passivation pitting corrosion chloride ion

Microstructure characterization and corrosion behavior of Mg-Y-Zn alloys with different long period stacking ordered structures

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Journal of Magnesium and Alloys 2020年第4期8卷 1208-1220页

作者： lisha wang Jinghua Jiang Huan Liu Bassiouny Saleh Aibin Ma College of Mechanics and Materials Hohai UniversityNanjing 210098China Suqian Institute Hohai UniversitySuqian 223800China

Mg-Y-Zn alloys with long period stacking ordered(LPSO)structure have received much attention recently and exhibit great potential in applications such as automotive,aerospace and in bio-medical *** paper aimed to investigate the effect of different phase constitution of LPSO structures on corrosion rate of bio-medical Mg-Y-Zn *** results showed that as-cast Mg98.5Y1Zn0.5 alloys containing only 18R structure exhibited the highest corrosion resistance with the corrosion rate of 2.78 mm/*** precipitation of 14H lamellas within a-Mg grains during solid solution treatment introduced the crystallographic orientation corrosion by accelerating micro-galvanic *** increase of 18R/14H interfaces deteriorated the corrosion resistance,and the grain boundaries also suffered from severe electrochemical *** work suggested that Mg-Y-Zn alloys with single LPSO structure(either 18R or 14H)exhibited better corrosion resistance than alloys with co-existence 18R and I4H LPSO structures.

关键词： Corrosion behavior Long period stacking ordered phase Magnesium alloys Solution treatment Bio-materials

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线性代数中的线性方程组方法

高等数学研究 2024年第1期27卷 62-65,84页

作者：王丽莎陈媛徐运阁湖北大学网络空间安全学院武汉430062 湖北大学数学与统计学学院应用数学湖北省重点实验室武汉430062

本文从齐次线性方程组的同解理论、非零解的判定、解空间的维数公式、解空间与系数矩阵行空间的正交性等角度,阐述线性方程组方法在线性代数中的广泛应用.

关键词：齐次线性方程组同解矩阵的秩正交

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静电驻极纳米纤维空气过滤材料研究现状

丝网印刷 2024年第4期 31-33页

作者：闵浩洋陈棋棋王丽莎新疆科技学院

介绍了空气过滤材料的发展历史,讲述了不同纺丝驻极技术的原理和方法,驻极技术的驻极特点,重点探讨了静电纺丝纳米技术和双驻极技术制备空气过滤材料存在的问题和现状,分析了无机驻极体材料对静电纺丝纳米技术制备薄膜的性能影响和改善... 详细信息

介绍了空气过滤材料的发展历史,讲述了不同纺丝驻极技术的原理和方法,驻极技术的驻极特点,重点探讨了静电纺丝纳米技术和双驻极技术制备空气过滤材料存在的问题和现状,分析了无机驻极体材料对静电纺丝纳米技术制备薄膜的性能影响和改善方法。

关键词：空气过滤材料静电纺丝驻极技术

Expression Recognition Method Based on Convolutional Neural Network and Capsule Neural Network

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Computers, Materials & Continua 2024年第4期79卷 1659-1677页

作者： Zhanfeng wang lisha Yao School of Computer Science and Artificial Intelligence Chaohu UniversityHefei238000China School of Big Data and Artificial Intelligence Anhui Xinhua UniversityHefei230088China

Convolutional neural networks struggle to accurately handle changes in angles and twists in the direction of images,which affects their ability to recognize patterns based on internal feature levels. In contrast, CapsNet overcomesthese limitations by vectorizing information through increased directionality and magnitude, ensuring that spatialinformation is not overlooked. Therefore, this study proposes a novel expression recognition technique calledCAPSULE-VGG, which combines the strengths of CapsNet and convolutional neural networks. By refining andintegrating features extracted by a convolutional neural network before introducing theminto CapsNet, ourmodelenhances facial recognition capabilities. Compared to traditional neural network models, our approach offersfaster training pace, improved convergence speed, and higher accuracy rates approaching stability. Experimentalresults demonstrate that our method achieves recognition rates of 74.14% for the FER2013 expression dataset and99.85% for the CK+ expression dataset. By contrasting these findings with those obtained using conventionalexpression recognition techniques and incorporating CapsNet’s advantages, we effectively address issues associatedwith convolutional neural networks while increasing expression identification accuracy.

关键词： Expression recognition capsule neural network convolutional neural network

基于全面规范化生产维护理论的多源治疗设备管理模式改进与应用研究

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中国医学装备 2024年第1期21卷 178-183页

作者：闫红张芸王浴萦王利莎袁亚翠空军军医大学第二附属医院烧伤整形科西安710000

目的:构建医疗设备全面规范化生产维护(TnPM)管理模式,探讨其在多源治疗设备管理中的应用价值。方法:按照自我管理、节约高效和动态改进的原则,构建多源治疗设备全生命周期管理体系的TnPM管理模式。选取2020年1月至2023年6月空军军医大... 详细信息

目的:构建医疗设备全面规范化生产维护(TnPM)管理模式,探讨其在多源治疗设备管理中的应用价值。方法:按照自我管理、节约高效和动态改进的原则,构建多源治疗设备全生命周期管理体系的TnPM管理模式。选取2020年1月至2023年6月空军军医大学第二附属医院整形烧伤科临床在用的22台多源治疗设备,根据管理模式不同分为对照组(16台)和观察组(18台,包括对照组12台和新增加的6台),对照组实施传统管理模式,观察组采用TnPM管理模式,对比两组设备运转质量、设备综合效率和队伍管理能力。结果:观察组设备故障率为(4.82±0.21)%,低于对照组,自修率、维护率和操作规范率分别为(91.63±3.59)%、(96.60±2.47)%和(97.31±1.54)%,均高于对照组,其差异有统计学意义(t=2.434、5.246、4.525、5.311,P<0.05);观察组设备可用率、表现指数比值及质量指数比值分别为(90.82±2.78)%、(97.03±2.24)%和(97.85±1.26)%,均高于对照组,其差异有统计学意义(t=6.231、4.671、5.997,P<0.05);观察组设备涉及的人员岗位职责认知、设备基础理论、使用保障水平的考核成绩评分和管理效率分别为(93.95±2.81)分、(91.45±2.47)分、(90.75±2.54)分和(93.08±3.34)%,均高于对照组,其差异有统计学意义(t=2.831、3.979、6.472、4.001,P<0.05)。结论:TnPM管理模式能够改善设备在临床患者治疗中的运转质量,降低故障发生率,提升设备综合效率和临床服务水平,促进管理人员队伍建设。

关键词：全面规范化生产维护(TnPM) 故障维修现场管理运行成本多源治疗设备

Change in genotoxicity of wastewater during chlorine dioxide and chlorine disinfections and the influence of ammonia nitrogen

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Frontiers of Environmental Science & Engineering 2007年第1期1卷 18-22页

作者： wang lisha HU Hongying wang Chao Koichi Fujie Environmental Simulation and Pollution Control State Key Joint Laboratory Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China Department of Ecological Engineering Toyohashi University of TechnologyToyohashiJapan

The effects of chlorine dioxide and chlorine disinfections on the genotoxicity of different biologically treated sewage wastewater samples were studied by *** experiment results showed that when chlorine dioxide dosage was increased from 0 to 30 mg/L,the genotoxicity of wastewater first decreased rapidly and then tended to be stable,while when the chlorine dosage was increased from 0 to 30 mg/L,the genotoxicity of wastewater changed diver sely for different *** was then found that ammonia nitro-gen did not affect the change of genotoxicity during chlorine dioxide disinfection of wastewater,while it greatly affected the change of genotoxicity during chlorine disin fection of *** the concentration of ammonia nitrogen was low(10-20 mg/L),the genotoxicity of wastewater increased after chlorine disinfection.

关键词： wastewater reuse chlorine dioxide disinfection chlorine disinfection genotoxicity ammonia nitrogen