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转向机压块Stick-slip异响问题分析及优化

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时代汽车 2024年第9期 141-144页

作者：陈佳欣金旭文肖会涛俞力铭梁九生博世华域转向系统有限公司上海201821

本文根据MSG型号单齿轮转向机测试驾驶员抱怨的换向异响问题,首先进行加速度贴片测试确定换向异响振幅最大区域主要来自于压块,进而影响齿条衬套与拉杆同样产生振幅,并推断出该异响类型为stick-slip噪声。然后采用故障树分析方法对压块... 详细信息

本文根据MSG型号单齿轮转向机测试驾驶员抱怨的换向异响问题,首先进行加速度贴片测试确定换向异响振幅最大区域主要来自于压块,进而影响齿条衬套与拉杆同样产生振幅,并推断出该异响类型为stick-slip噪声。然后采用故障树分析方法对压块产生噪音的主要原因逐层分析从而确定优化方向。最后从零件表面粗糙度因素和零件润滑因素两个方面确定优化方案,为相同类型问题的解决提供一定的理论参考。

关键词：单齿轮式电子转向机压块压块衬片故障树分析方法

Dual-crosslinked regenerative hydrogel for sutureless long-term repair of corneal defect

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Bioactive Materials 2023年第2期20卷 434-448页

作者： Xuanren Shen Saiqun Li Xuan Zhao Jiandong Han jiaxin chen Zilong Rao Kexin Zhang Daping Quan Jin Yuan Ying Bai Guangdong Engineering Technology Research Centre for Functional Biomaterials School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou510006China State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou510623China

Corneal transplantation is the most effective clinical treatment for corneal defects,but it requires precise size of donor corneas,surgical sutures,and overcoming other technical *** patients may suffer graft rejection and complications caused by *** glues that can long-term integrate with the corneal tissue and effectively repair the focal corneal damage are highly ***,a hybrid hydrogel consisting of porcine decellularized corneal stroma matrix(pDCSM)and methacrylated hyaluronic acid(HAMA)was developed through a non-competitive dual-crosslinking *** can be directly filled into corneal defects with various *** importantly,through formation of interpenetrating network and stable amide bonds between the hydrogel and adjacent tissue,the hydrogel manifested excellent adhesion properties to achieve suture-free ***,the hybrid hydrogel not only preserved bioactive components from pDCSM,but also exhibited cornea-matching transparency,low swelling ratio,slow degradation,and enhanced mechanical properties,which was capable of withstanding superhigh intraocular *** combinatorial hydrogel greatly improved the poor cell adhesion performance of HAMA,supported the viability,proliferation of corneal cells,and preservation of keratocyte *** a rabbit corneal stromal defect model,the experimental eyes treated with the hybrid hydrogel remained transparent and adhered intimately to the stroma bed with long-term retention,accelerated corneal re-epithelialization and wound *** the advantages of high bioactivity,low-cost,and good practicality,the dual-crosslinked hybrid hydrogel served effectively for long-term suture-free treatment and tissue regeneration after corneal defect.

关键词： Corneal defect Decellularized extracellular matrix Hydrogel Sutureless repair Cornea regeneration

余志勇应用姜熨法治疗特发性面神经麻痹的经验总结

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中国民间疗法 2024年第2期32卷 15-18页

作者：陈楚云黄应杰林少贞曹湘萍李富铭陈嘉欣广州医科大学附属中医医院(广州市针灸医院) 广东广州510130

余志勇主任是澄江针灸学派第3代传承人,传承伍天民教授擅长应用外治法治病的精髓,受《黄帝内经》“病生于筋,治之以熨引”理论启发,根据特发性面神经麻痹的病因病机,选用生姜发散风寒之性作为烫熨治疗的药物,采用姜熨疗法治疗特发性面... 详细信息

余志勇主任是澄江针灸学派第3代传承人,传承伍天民教授擅长应用外治法治病的精髓,受《黄帝内经》“病生于筋,治之以熨引”理论启发,根据特发性面神经麻痹的病因病机,选用生姜发散风寒之性作为烫熨治疗的药物,采用姜熨疗法治疗特发性面神经麻痹。该文对熨法的来源、理论、作用与适应证进行总结,介绍余志勇主任用姜熨法治疗特发性面神经麻痹的经验、操作过程和验案1则。

关键词：特发性面神经麻痹面瘫筋病姜熨法药熨伍天民余志勇

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Facet-induced coordination competition for highly ordered CsPbBr_(3) nanoplatelets with strong polarized emission

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Nano Research 2022年第1期15卷 502-509页

作者： Dandan Yang Xiaoming Li Yuelei Li Bo Cai Lin Su Shengli Zhang Zhili Juan Cuifang Meng Dongling Geng jiaxin chen Feng Xu Haibo Zeng MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics&NanomaterialsCollege of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China

Controllable anisotropic growth of perovskite nanocrystals(NCs)is challenging since it is difficult to separate the nucleation and growth ***,a two-step nucleation strategy is proposed to control the binding interaction between surface ligands and NCs,resulting in facet-induced coordination *** acid as surface activated ligand leads to the formation of defective lead bromine octahedron,and the binding interaction between 4-dodecylbenzenesulfonic acid and lead atoms promotes the formation of two kinds of binding *** on this strategy,the anisotropic growth of CsPbBr_(3) nanoplatelet(NPLs)with adjusted length from 11.4 to 24 nm,and the evolution of NPLs from stacked to tongue-shaped have been *** line scan reveals the sulfur atoms mainly distribute at the edge of ***,binding energy calculation and experimental results illustrate the coordination competition of different binding interaction on specific facets induces the anisotropic growth of ***,strong emission anisotropy of highly ordered NPLs with polarization ratio up to 0.58 is *** work not only deepens our understanding of the controllable synthesis of perovskite NCs,but also provides a reference for the regulation of light emitting diode and soler cells.

关键词： CsPbBr_(3)nanoplatelet(NPLs) anisotropic growth benzenesulfonic acid group facet-induced coordination competition polarized emission

Reasonable design a high-entropy garnet-type solid electrolyte for all-solid-state lithium batteries

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Journal of Energy Chemistry 2024年第9期96卷 414-423页

作者： Shiyu Yu Yandi Li jiaxin Luo Daming chen Liang Yang Yaqing Wei De Li Yuanxun Li Yong chen State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan UniversityHaikou 570228HainanChina State Key Laboratory of Electronic Thin Films1nd Integrated Devices University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000GuangdongChina

Traditional garnet solid electrolyte(Li_(7)La_(3)Zr_(2)O_(12))suffers from low room temperature ionic conductivity,poor air stability,high sintering temperature and energy *** the development prospects of high-entropy materials with high structural disorder and strong component controllability in the field of electrochemical energy storage,herein,a novel high-entropy garnet-type oxide solid electrolyte,Li_(5.75)Ga_(0.25)La_(3)Zr_(0.5)Ti_(0.5)Sn_(0.5)Nb_(0.5)O_(12)(LGLZTSNO)was constructed by partially replacing the Li and Zr sites in Li_(7)La_(3)Zr_(2)O_(12)with Ga and Ti/Sn/Nb elements,*** experimental and density functional theory(DFT)calculation results show that the high-entropy LGLZTSNO electrolyte has preferable room temperature ion conductivity,air stability,interface contact performance with lithium anode,and the ability to suppress lithium *** to the improvement of electrolyte performance,the critical current density of Li/Ag@LGLZTSNO/Li symmetric cell was increased from 0.42 to 1.57 mA cm^(−2),and the interface area specific impedance(IASR)was reduced from 765.2 to 42.3Ωcm^(2).Meanwhile,the Li/Ag@LGLZTSNO/LFP full cell also exhibits excellent rate performance and cycling performance(148 mA h g^(−1)at 0.1 C and 124 mA h g^(−1)at 0.5 C,capacity retention up to 84.8%after 100 cycles at 0.1 C),showing the application prospects of high-entropy LGLZTSNO solid electrolyte in high-performance all solid state lithium batteries.

关键词： Garnet solid electrolyte Dual-site substitution High-entropy all solid-state lithium batteries(ASSLBs)

Generative Multi-Modal Mutual Enhancement Video Semantic Communications

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2985-3009页

作者： Yuanle chen Haobo Wang Chunyu Liu Linyi Wang jiaxin Liu Wei Wu The College of Communication and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210023China The College of Science Nanjing University of Posts and TelecommunicationsNanjing210023China

Recently,there have been significant advancements in the study of semantic communication in single-modal ***,the ability to process information in multi-modal environments remains *** by the research and applications of natural language processing across different modalities,our goal is to accurately extract frame-level semantic information from videos and ultimately transmit high-quality ***,we propose a deep learning-basedMulti-ModalMutual Enhancement Video Semantic Communication system,called *** upon a VectorQuantized Generative AdversarialNetwork(VQGAN),our systemaims to leverage mutual enhancement among different modalities by using text as the main carrier of *** it,the semantic information can be extracted fromkey-frame images and audio of the video and performdifferential value to ensure that the extracted text conveys accurate semantic information with fewer bits,thus improving the capacity of the ***,a multi-frame semantic detection module is designed to facilitate semantic transitions during video *** results demonstrate that our proposed model maintains high robustness in complex noise environments,particularly in low signal-to-noise ratio conditions,significantly improving the accuracy and speed of semantic transmission in video communication by approximately 50 percent.

关键词： Generative adversarial networks multi-modal mutual enhancement video semantic transmission deep learning

基于GWO-BiLSTM的岩性识别方法研究与应用

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河北地质大学学报 2024年第5期47卷 30-37页

作者：崔文洁赵军龙陈家鑫张雨辰孙婧金利睿西安石油大学地球科学与工程学院陕西西安710000 西安石油大学陕西省油气成藏地质学重点实验室陕西西安710000

为解决常规岩性识别方法精度不高、耗时较长且受人为影响较大等问题,构建了基于GWO-BiLSTM的岩性识别方法。结合录井资料、岩心资料以及测井资料,采用常规方法对研究区进行岩性识别,效果较差,进而利用GWO-BiLSTM模型在研究区展开岩性识... 详细信息

为解决常规岩性识别方法精度不高、耗时较长且受人为影响较大等问题,构建了基于GWO-BiLSTM的岩性识别方法。结合录井资料、岩心资料以及测井资料,采用常规方法对研究区进行岩性识别,效果较差,进而利用GWO-BiLSTM模型在研究区展开岩性识别工作。根据皮尔逊函数对各测井曲线与岩性进行分析,优选出相关系数绝对值大于0.3的测井曲线值作为输入特征,采用灰狼优化算法对BiLSTM超参数组合随机生成与更新,从而更加快速地获取最优解,进一步提高模型的效率以及准确率。实验表明,基于GWO-BiLSTM模型的岩性识别准确率达96%,与BiLSTM模型、RF模型、BP神经网络和SVM模型相比具有较高的准确率,验证了该模型在识别复杂岩性时的可靠性,并为复杂岩性识别提供了方法参考。

关键词：复杂岩性识别灰狼优化算法双向长短时记忆神经网络交会图法机器学习

Bacteria-responsive programmed self-activating antibacterial hydrogel to remodel regeneration microenvironment for infected wound healing

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National Science Review 2024年第4期11卷 254-270页

作者： Yutong Yang jiaxin Wang Shengfei Huang Meng Li Jueying chen Dandan Pei Zhen Tang Baolin Guo State Key Laboratory for Mechanical Behavior of Materials and Frontier Institute of Science and Technology and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine ResearchCollege of Stomatology Xi'an Jiaotong University Department of Orthopedics Tangdu Hospital Fourth Military Medical University Department of Orthopedics The First Affiliated Hospital of Xi'an Jiaotong University

There is still an urgent need to develop hydrogels with intelligent antibacterial ability to achieve on-demand treatment of infected wounds and accelerate wound healing by improving the regeneration microenvironment. We proposed a strategy of hydrogel wound dressing with bacteria-responsive self-activating antibacterial property and multiple nanozyme activities to remodel the regeneration microenvironment in order to significantly promote infected wound healing. Specifically, p H-responsive H2O2self-supplying composite nanozyme（MSCO） and p H/enzyme-sensitive bacteria-responsive triblock micelles encapsulated with lactate oxidase（PPEL） were prepared and encapsulated in hydrogels composed of L-arginine-modified chitosan（CA） and phenylboronic acid-modified oxidized dextran（ODP） to form a cascade bacteria-responsive self-activating antibacterial composite hydrogel platform. The hydrogels respond to multifactorial changes of the bacterial metabolic microenvironment to achieve on-demand antibacterial and biofilm eradication through transformation of bacterial metabolites, and chemodynamic therapy enhanced by nanozyme activity in conjunction with self-driven nitric oxide（NO） release. The composite hydrogel showed 'self-diagnostic' treatment for changes in the wound *** self-activating antibacterial therapy in the infection stage to self-adaptive oxidative stress relief and angiogenesis in the post-infection stage, it promotes wound closure, accelerates wound collagen deposition and angiogenesis, and completely improves the microenvironment of infected wound regeneration, which provides a new method for the design of intelligent wound dressings.

关键词： bacterial response hydrogel dressing multiple nanozyme activity biofilm elimination infected motion wound healing

One-step preparation of efficient cuprous chloride catalyst for direct synthesis of trimethoxysilane

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Chinese Journal of Chemical Engineering 2024年第7期71卷 161-171页

作者： jiaxin Zhang Lu Wang Zhiqiang Ma Chuanjun Di Guanghui chen Jipeng Dong Jianlong Li Fei Gao Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China

CuCl-based catalysts are the most commonly used catalysts for the“direct synthesis”of trimethoxysilane(M3).CuCl species are sensitive to air and water,and are prone to oxidation *** CuCl is directly used as a catalyst,it needs to be purified before the utilization,and the operating conditions for the catalyst preparation are relatively harsh,requiring the inert gas *** a high-temperature activation step required for CuCl-based catalysts used for catalyzing synthesis of M3 to form active phase Cu–Si alloys(Cu_(x)Si)with Si powder,in this work,a series of catalysts for the“direct synthesis”of M3 were obtained by a one-step high-temperature activation of the mixture of stable CuCl_(2) precursors,activated carbon-reducing agent,and Si powder,simultaneously achieving the reduction of CuCl_(2) to CuCl and the formation of active phase Cu_(x)Si alloys of CuCl with Si *** prepared samples were characterized through various characterization techniques,and investigated for the catalytic performance for the“direct synthesis”of ***,the operation conditions were optimized,including the activation temperature,catalyst dosage,Si powder particle size,and reaction *** characterization results indicate that during the one-step activation process,the CuCl_(2) precursor is reduced to CuCl,and the resulting CuCl simultaneously reacts with Si powder to form active phases Cu3Si and Cu15Si4 *** optimal catalyst Sacm(250,0.8:10)exhibits a good catalytic activity with selectivity of 95%and yield of 77%for M3,and shows a good universality for various alcohol ***,the catalytic mechanism of the prepared catalyst for the“direct synthesis”of M3 was discussed.

关键词： Trimethoxysilane Cuprous chloride Catalysis Catalyst activation Reduction Active phase formation