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Granting strength to aerogel fibers through encapsulation

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Science China Materials 2024年第4期67卷 1365-1366页

作者： Wenhui xu Department of Basic Chemistry School of PharmacyJiangxi University of Chinese MedicineNanchang 330004China

Aerogel fibers, distinguished by their lightweight nature, pronounced porosity, large surface area, and superior thermal insulation properties, have diversified applications in thermal management, energy devices, and environmental remediation[1]. However, compared with monolithic ones, these fibershaped aerogels exhibit limited mechanical strength and resilience due to their one-dimensional small size.

关键词： strength fibers thermal

Skeletal interoception in osteoarthritis

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Bone Research 2024年第2期12卷 241-254页

作者： Dinglong Yang Jiawen xu Ke xu Peng xu Department of Joint Surgery Honghui HospitalXi’an Jiaotong UniversityXi’an 710054China Department of Orthopedic Surgery and Orthopedic Research Institute West China HospitalSichuan UniversityChengdu 610041China

The interoception maintains proper physiological conditions and metabolic homeostasis by releasing regulatory signals after perceving changes in the internal state of the *** its various forms,skeletal interoception specifically regulates the metabolic homeostasis of ***(OA)is a complex joint disorder involving cartilage,subchondral bone,and *** subchondral bone undergoes continuous remodeling to adapt to dynamic joint *** findings highlight that skeletal interoception mediated by aberrant mechanical loads contributes to pathological remodeling of the subchondral bone,resulting in subchondral bone sclerosis in *** skeletal interoception is also a potential mechanism for chronic synovial inflammation in *** this review,we offer a general overview of interoception,specifically skeletal interoception,subchondral bone microenviroment and the aberrant subchondral *** also discuss the role of skeletal interoception in abnormal subchondral bone remodeling and synovial inflammation in OA,as well as the potential prospects and challenges in exploring novel OA therapies that target skeletal interoception.

关键词： homeostasis inflammation releasing

胶东三山岛-仓上断裂带控矿规律与找矿勘查实践

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地质与勘探 2019年第2期55卷 528-541页

作者：刘日富周鑫吕雨璐许延波山东黄金地质矿产勘查有限公司山东烟台261400

三山岛-仓上断裂带是我国著名胶东金矿集区重要的金矿成矿带之一;近十年来,地勘单位与科研院校针对该成矿带深部资源的预测与勘查做了大量的工作,并提出了阶梯式成矿模式。三山岛-仓上断裂带断裂带主裂面整体较陡,主要沿不同岩体的接触... 详细信息

三山岛-仓上断裂带是我国著名胶东金矿集区重要的金矿成矿带之一;近十年来,地勘单位与科研院校针对该成矿带深部资源的预测与勘查做了大量的工作,并提出了阶梯式成矿模式。三山岛-仓上断裂带断裂带主裂面整体较陡,主要沿不同岩体的接触面进行展布,从上至下整体呈现逐渐变缓的趋势,构造蚀变带纵向上呈"S"型或反"S"型的张裂处为成矿提供了有利空间,区域内金矿体主要赋存在主裂面的下盘。对断裂带宏观和微观地质特征的分析显示,断裂带北部在三山岛地段走向NE以张剪性为主,赋存矿体延深大于延长;而在南部新立地段和仓上地段之间断裂带走向近NEE以张性为主,赋存矿体延长大于延深。针对三山岛-仓上成矿带南部与北部成矿地质条件的差异性,有针对性布设探矿工程,南部布设工程走向间距可大于倾向间距,钻孔相对较浅;北部布设工程倾向间距可大于走向间距,钻孔相对较深。

关键词：构造特征阶梯式成矿矿床勘查三山岛-仓上断裂带胶东

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贵州某重晶石矿石选矿实验研究

矿产综合利用 2023年第4期 138-143页

作者：徐妍博邓伟杨耀辉中国地质科学院矿产综合利用研究所自然资源部战略性矿产综合利用工程技术创新中心四川成都610041

这是一篇矿物加工工程领域的文章。重晶石是一种重要的非金属矿物,具有比重大、无毒、无磁性、易吸收射线等特点,主要用于石油天然气钻井泥浆加重剂、制备含钡化工产品和钡合金,我国是重晶石的主要出口国。本文对贵州某地低品位重晶石... 详细信息

这是一篇矿物加工工程领域的文章。重晶石是一种重要的非金属矿物,具有比重大、无毒、无磁性、易吸收射线等特点,主要用于石油天然气钻井泥浆加重剂、制备含钡化工产品和钡合金,我国是重晶石的主要出口国。本文对贵州某地低品位重晶石进行选矿实验研究,用碳酸钠作调整剂、水玻璃作抑制剂、十二烷基硫酸钠作捕收剂,经过“一粗一扫二精”的闭路流程实验,取得了BaSO_(4)品位90.38%、回收率91.78%的重晶石精矿,实验技术指标良好,精矿达到化工用重晶石一等品要求。本研究成果可为重晶石资源的开发利用提供重要的技术支撑和参考。

关键词：矿物加工工程重晶石浮选工艺流程

Malware Evasion Attacks Against IoT and Other Devices: An Empirical Study

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Tsinghua Science and Technology 2024年第1期29卷 127-142页

作者： Yan xu Deqiang Li Qianmu Li Shouhuai xu School of Computer Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of Computer Science University of Colorado Colorado SpringsColorado SpringsCO 80918USA

The Internet of Things(loT)has grown rapidly due to artificial intelligence driven edge *** enabling many new functions,edge computing devices expand the vulnerability surface and have become the target of malware ***,attackers have used advanced techniques to evade defenses by transforming their malware into functionality-preserving *** systematically analyze such evasion attacks and conduct a large-scale empirical study in this paper to evaluate their impact on *** specifically,we focus on two forms of evasion attacks:obfuscation and adversarial *** the best of our knowledge,this paper is the first to investigate and contrast the two families of evasion attacks *** apply 10 obfuscation attacks and 9 adversarial attacks to 2870 malware *** obtained findings are as follows.(1)Commercial Off-The-Shelf(COTS)malware detectors are vulnerable to evasion attacks.(2)Adversarial attacks affect COTS malware detectors slightly more effectively than obfuscated malware examples.(3)Code similarity detection approaches can be affected by obfuscated examples and are barely affected by adversarial attacks.(4)These attacks can preserve the functionality of original malware examples.

关键词： Android malware obfuscation adversarial examples

Experimental study on performance of spring damping support structure system for large deformation tunnel in soft rock

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Underground Space 2024年第2期15卷 221-243页

作者： Jinfeng xu Xiongyao Xie Zhou Shi Wuqiang Cai Dinglun xu Chen xu Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical and Underground Engineering Ministry of EducationTongji UniversityShanghai 200092China Zhaotong City Zhaolu Expressway Investment and Development Co. ZhaotongYunnan Province 657000China Institute of Rock Mechanics Ningbo UniversityNingboZhejiang 315211China

According to the convergence confinement theory,it is an effective measure to control the large deformation of high ground stress in fractured soft rock tunnels by using yielding *** yielding support can be classified as either radial or circumferential yielding *** yielding support is achieved by transforming radial displacement into circumferential tangential closure without compromising the support capacity of the primary lining support *** on this,and inspired by the design principle of dampers,a yielding support structure system with spring damping elements as its core was developed,based on the connection characteristics of steel arches in highway tunnel,which can provide increasing support resistance in the yielding deformation *** the mechanical properties of spring damping elements were obtained through indoor axial pressure and flexural *** addition,according to these results with numerical calculations,the yielding support structure system with embedded spring damping elements can reduce the internal force of the support structure by approximately 10%and increase the area of the plastic zone of the surrounding rock by 11.23%,which can fully utilize the self-bearing capacity of surrounding rock and verify the effectiveness of circumferential yielding ***,the spring damping support structure system was designed with reference to the construction process of the tunnel excavated by drilling and blasting method,and the transformation of the spring damping element to spring damping support structure was *** on field test results,surrounding ground pressure for the yielding support optimization scheme was reduced by 40%and more evenly distributed,resulting in the successful application and a reduction in the construction cost of large deformation tunnels in soft rock.

关键词： Soft rock Highway tunnel Convergence confinement method Circumferential yielding support with spring damping element Numerical calculations Field test

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三维激光扫描技术在建筑工程中的应用

测绘通报 2021年第S1期 265-269页

作者：许艳博李毅王忠勤黄鹤北京市测绘设计研究院北京100038 北京建筑大学测绘与城市空间信息学院北京100044

三维激光扫描技术作为近年来测绘领域的热点技术,因其快速、精确、无接触的特点,应用越来越广。本文以"北京市建设工程全过程监督核测"政策为背景,制定了基于三维激光技术的建筑工程核测竣工的整体技术流程,应用于亦庄开发区45#街区实... 详细信息

三维激光扫描技术作为近年来测绘领域的热点技术,因其快速、精确、无接触的特点,应用越来越广。本文以"北京市建设工程全过程监督核测"政策为背景,制定了基于三维激光技术的建筑工程核测竣工的整体技术流程,应用于亦庄开发区45#街区实际工程项目,进行了该技术流程的适用性研究。研究结果表明,该方法采集数据高效、精准,可替代传统全站仪作业模式,在大面积、建(构)筑物众多的区域具有广阔的应用前景。

关键词：站式扫描仪核测竣工 RTC360

From 0D to 3D:Hierarchical structured high-performance free-standing silicon anodes based on binder-induced topological network architecture

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Journal of Energy Chemistry 2024年第6期93卷 16-23,I0002页

作者： Yihong Tong Ruicheng Cao Guanghui xu Yifeng Xia Hongyuan xu Hong Jin Hui xu Xi’an Jiaotong University Suzhou Academy Suzhou 215123JiangsuChina Nano Science and Technology Institute University of Science and Technology of ChinaSuzhou 215123JiangsuChina

Free-standing silicon anodes with high proportion of active materials have aroused great attention;however,the mechanical stability and electrochemical performance are severely ***,to resolve the appeal issues,a free-standing anode with a"corrugated paper"shape on micro-scale and a topological crosslinking network on the submicron and nano-scale is ***,an integrated three-dimensional electrode structure is constructed based on robust carbon nanotubes network with firmly anchored SiNPs via forming interlocking *** which,the hierarchical interlocking structure is achieved by directional induction of the binder,which ensures well integration during cycling so that significantly enhances mechanical stability as well as electronic and ionic conductivity of *** from it,this anode exhibits outsta nding performance under harsh service conditions including high Si loading,ultrahigh areal capacity(33.2 mA h cm^(-2)),and high/low temperatures(-15-60℃),which significantly extends its practical ***,the optimization mechanism of this electrode is explored to verify the crack-healing and structure-integration maintaining along cycling via a unique self-stabilization ***,from both the fundamental and engineering views,this strategy offers a promising path to produce high-performance free-standing electrodes for flexible device applications especially facing volume effect challenges.

关键词： Topological network Self-stabilization Flexibility Free-standing Silicon anode

How to build a habitable planet:an interview with Charles H. Langmuir

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National Science Review 2024年第6期11卷 76-80页

作者： Yi-Gang xu the Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Earth is the only known habitable planet in the solar system. Understanding how Earth developed its unique habitability has been the frontier of Earth sciences and has become one of the main themes of current deep-space explorations. What are the decisive factors that led to a habitable planet? What is the role of solid Earth processes in the origin of life and in modulating the surface environment? Are Earth’s habitability studies relevant to current challenges that human beings face? These questions have attracted the interest of both scientists and the public alike.

关键词： Earth (planet)