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Crack monitoring method based on Cu coating sensor and electrical potential technique for metal structure

Chinese Journal of Aeronautics 2015年第3期28卷 932-938页

作者： hou bo He Yuting Cui Ronghong Gao Chao Zhang Teng Aeronautics and Astronautics Engineering College Air Force Engineering University

Abstract Advanced crack monitoring technique is the cornerstone of aircraft structural health monitoring. To achieve realtime crack monitoring of aircraft metal structures in the course of ser vice, a new crack monitoring method is proposed based on Cu coating sensor and electrical poten tial difference principle. Firstly, insulation treatment process was used to prepare a dielectric layer on structural substrate, such as an anodizing layer on 2AI2T4 aluminum alloy substrate, and then a Cu coating crack monitoring sensor was deposited on the structure fatigue critical parts by pulsed bias arc ion plating technology. Secondly, the damage consistency of the Cu coating sensor and 2A12T4 aluminum alloy substrate was investigated by static tensile experiment and fatigue test. The results show that strain values of the coating sensor and the 2A 12T4 aluminum alloy substrate measured by strain gauges are highly coincident in static tensile experiment and the sensor has excel lent fatigue damage consistency with the substrate. Thirdly, the fatigue performance discrepancy between samples with the coating sensor and original samples was investigated. The result shows that there is no obvious negative influence on the fatigue performance of the 2A12T4 aluminum alloy after preparing the Cu coating sensor on its surface. Finally, crack monitoring experiment was carried out with the Cu coating sensor. The experimental results indicate that the sensor is sensitive to crack, and crack origination and propagation can be monitored effectively through analyzing the change of electrical potential values of the coating sensor.

关键词： Aluminum alloy Are ion plating Coating sensor Crack detection Electrical potential Fatigue Structural health monitoring

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LC-MS/MS结合分子网络技术快速鉴定生三七和砂烫三七的三萜皂苷类成分

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分析测试学报 2024年第3期43卷 421-431页

作者：陈兴龙周堂白同尘张海莹侯博张荣平云南中医药大学中药学院暨云南省南药可持续利用研究重点实验室云南昆明650500

采用液相色谱-串联质谱(LC-MS/MS)和分子网络技术,快速鉴定了生三七和砂烫三七中的三萜皂苷类成分。通过170~220℃高温河砂炒制获得砂烫三七,70%乙醇-水回流提取获得生三七和砂烫三七浸膏,利用D101大孔树脂以70%乙醇-水洗脱获得三七总... 详细信息

采用液相色谱-串联质谱(LC-MS/MS)和分子网络技术,快速鉴定了生三七和砂烫三七中的三萜皂苷类成分。通过170~220℃高温河砂炒制获得砂烫三七,70%乙醇-水回流提取获得生三七和砂烫三七浸膏,利用D101大孔树脂以70%乙醇-水洗脱获得三七总皂苷。采用Agilent C_(18)色谱柱(100 mm×2.1 mm,3.5µm),以0.05%甲酸-水和乙腈为流动相进行梯度洗脱,在负离子模式下采集三萜皂苷对照品、生三七总皂苷和砂烫三七总皂苷的二级质谱信息。将经格式转换后的MS/MS数据上传至全球天然产物社会分子网络(GNPS)平台计算分析,借助Cytoscape 3.9.1软件构建可视化分子网络,获得生三七和砂烫三七三萜皂苷的分子网络图。根据对照品、保留时间、特征碎片离子、MS/MS裂解规律和文献报道等信息,从生三七中鉴定出50个三萜皂苷,从砂烫三七中鉴定出60个三萜皂苷,二者共有23个皂苷类成分;生三七单独含有27个成分,包括11个丙二酰基取代的皂苷;砂烫三七单独含有37个成分,包括19个乙酰基取代的成分。其中有11个成分通过对照品进行验证。采用高效液相色谱法测定了生三七和砂烫三七总皂苷中人参皂苷Rb1、Rg1、Rg3、Rh4、Rk3和三七皂苷R1的含量,发现生三七中原生皂苷的含量较高,砂烫三七中转化皂苷的含量较高。

关键词：生三七砂烫三七三萜皂苷液相色谱-串联质谱分子网络

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Controlled growth of silver nanoparticles in a hydrothermal process

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China Particuology 2007年第3期5卷 206-212页

作者： Juan Zou Yao Xu bo hou Dong Wu Yuhan Sun State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 China

A two-step synthesis was used to control the shape of silver nanoparticles prepared via reduction of Ag^＋ ions in aqueous Ag（NH3）2NO3 by poly（N-vinyl-2 First, a few spherical silver nanoparticles,-10 nm in size, were pyrrolidone）（PVP）. Then, in a subsequent hydrothermal treatment, the remaining Ag^＋ ions were reduced by PVP into polyhedral nanoparticles, or larger spherical nanoparticles formed from the small spherical seed silver nanoparticles in the first step. The morphology and size of the resultant particles depend on the hydrothermal temperature, PVP/Ag molar ratio and concentration of Ag^＋ ions. By using UV-visible spectroscopy （UV-vis）, transmission electron microscopy （TEM） and powder X-ray diffraction （XRD）, the possible growth mechanism of the silver nanoparticles was discussed. 2007 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V.

关键词： Silver nanoparticles Hydrothermal process Morphology-evolvement Nanoplates

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基于“肺合大肠”理论探讨流感病毒与肠屏障损伤相关性

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陕西中医 2024年第7期45卷 942-946页

作者：李东楠侯博吴倩王海黑龙江中医药大学黑龙江哈尔滨150040 黑龙江中医药大学附属第一医院儿科黑龙江哈尔滨150040

现代医学理论中肺与大肠在分化发育、生理病理、功能协作、物质联系上有结构、功能、菌群基础作为支撑依据,这与《黄帝内经》藏象篇中脏腑相关理论不谋而合。在外感热病的疾病传变中,肺与大肠相关联以及反馈调节机制的“肺病从肠论治”... 详细信息

现代医学理论中肺与大肠在分化发育、生理病理、功能协作、物质联系上有结构、功能、菌群基础作为支撑依据,这与《黄帝内经》藏象篇中脏腑相关理论不谋而合。在外感热病的疾病传变中,肺与大肠相关联以及反馈调节机制的“肺病从肠论治”“肠病从肺论治”论述成为近年来的研究热点。基于此,从肠屏障的角度系统归纳总结梳理近年来国内外学者探求流感病毒诱导肺系疾病的作用机制,并通过阐述肺经药以及肺肠同治验方作为工具药验证以肺-肠表里理论为指导的药物对流感病毒诱导的肺系疾病的保护机制,揭示流感病毒中肺与肠在疾病传变中的反馈及药物干预机制,阐明肺-肠表里理论的现代内涵,以期为中医药在病毒性疾病中广谱治疗提供现代依据。

关键词：肺合大肠流感病毒肠屏障肠道菌群黏膜免疫脏腑辨证

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带次模惩罚的部分命中集问题的近似算法

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河北师范大学学报（自然科学版） 2024年第5期48卷 448-455页

作者：刘钦侯波张更生刘稳河北师范大学数学科学学院河北石家庄050024

研究了带次模惩罚的部分命中集问题.给定一个超图H=(V,E),一个定义在V上的费用函数,一个定义在2~E上的次模惩罚函数,和一个非负整数k.问题的目标是找一个顶点子集S?V,使得S至少覆盖k条超边,且S的总费用加上未被S覆盖的超边集的惩罚费用... 详细信息

研究了带次模惩罚的部分命中集问题.给定一个超图H=(V,E),一个定义在V上的费用函数,一个定义在2~E上的次模惩罚函数,和一个非负整数k.问题的目标是找一个顶点子集S?V,使得S至少覆盖k条超边,且S的总费用加上未被S覆盖的超边集的惩罚费用之和最小.设计了一个基于原始-对偶的两阶段组合算法来解决该问题.当次模惩罚函数是正规化的且非减时,得到算法的近似因子为l+1,其中l是超边所含的顶点数的最大值.

关键词：近似算法命中集问题次模惩罚原始-对偶

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Quantum Currents in the coset Space SU(2)/U(1)

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Communications in Theoretical Physics 2002年第1期37卷 59-62页

作者： Ding Xiang-Mao hou bo-Yu Zhao Liu Institute of Applied Mathematics Academy of Mathematics and System Sciences Academia Sinica P.O. Box 2734 Beijing 100080 China Institute of Modern Physics Northwest University Xi'an 710069 China

We propose a rational quantum deformed nonlocal currents in the homogeneous space SU(2)k/U(1), and in terms of it and a free boson field a representation for the Drinfeld currents of Yangian double at a general level k = c is obtained. In the classical limit h → 0, the quantum nonlocal currents become SU(2)k parafermion, and the realization of Yangian double becomes the parafermion realization of SU(2)k current algebra.

关键词：量子理论仿射李代数量子流 SU(2)/U(1)空间

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Rational SU(3) Gaudin Model

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Communications in Theoretical Physics 2001年第2期36卷 139-144页

作者： Cao Jun-Peng hou bo-Yu Yue Rui-Hong Institute of Modern Physics Northwest University Xi'an 710069 China

The Hamiltonians of the SU(3) Gaudin model are constructed based on the nonrelativistic limit of the SU(3) chain. After the quantum determinant being well defined, the eigenvectors and eigenvalues of the Hamiltonians of the SU(3) Gaudin model are given. These results can be generalized to any number of constituting spins (SU( N) ).

关键词：量子力学 SU(3)群自旋链

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辣椒素对味觉的损伤机制

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中国食品学报 2024年第3期24卷 321-331页

作者：孙宇轩王适雨王梓璇王童童马燕王敏侯薄韩天龙刘登勇渤海大学食品科学与工程学院辽宁锦州121013 辽宁省肉类食品专业技术创新中心辽宁锦州121013 辽宁喀左山猪科技小院辽宁朝阳122305 成都大学肉类加工四川省重点实验室成都610106

辣椒素类物质是表征辣椒辛辣刺激的活性成分,是开启"辣味感觉之门"的钥匙,即辛辣感的来源。辣椒素类物质通过与口腔的相互作用,使得TRPV1被辣椒素激活,细胞内钙离子增加,触发神经末梢,释放神经肽类,最终引起大脑皮层痛觉形成,从而产生... 详细信息

辣椒素类物质是表征辣椒辛辣刺激的活性成分,是开启"辣味感觉之门"的钥匙,即辛辣感的来源。辣椒素类物质通过与口腔的相互作用,使得TRPV1被辣椒素激活,细胞内钙离子增加,触发神经末梢,释放神经肽类,最终引起大脑皮层痛觉形成,从而产生辣味感觉。研究发现,辣椒素对味觉存在一定的损伤,辣椒素可能通过减少味蕾数量,改变味觉转导或味觉受体细胞兴奋性,从而直接或间接对味觉神经传递进行抑制,造成相关味觉细胞与神经的损伤。本文综述辣味对味觉的调节、损伤机制以及新型辣椒素-味觉交互技术的研究现状,探讨其潜在影响机制研究的不足,并展望未来研究方向,以期为辣椒素在食品中的应用以及避免辣椒素造成的损伤提供参考。

关键词：辣椒素辣味感知损伤机制味觉调节味觉载体工具

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Superior strength-plasticity synergy in a heterogeneous lamellar Ti_(2)AlC/TiAl composite with unique interfacial microstructure

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Journal of Materials Science & Technology 2023年第28期159卷 21-32页

作者： Pei Liu bo hou Aiqin Wang Jingpei Xie Zhenbo Wang Feng Ye College of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang 471023China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

Improving the plasticity of TiAl alloys at room temperature has been a longstanding challenge for the de-velopment of next-generation aerospace *** adopting the nacre-like architecture design strategy,we have obtained a novel heterogeneous lamellar Ti_(2)AlC/TiAl composite with superior strength-plasticity synergy,i.e.,compressive strength of∼2065 MPa and fracture strain of∼27%.A combination of micropil-lar compression and large-scale atomistic simulation has revealed that the superior strength-plasticity synergy is attributed to the collaboration of Ti_(2)AlC reinforcement,lamellar architecture and heteroge-neous *** specifically,multiple deformation modes in Ti_(2)AlC,i.e.,basal-plane dislocations,atomic-scale ripples and kink bands,could be activated during the compression,thus promoting the plas-tic deformation capability of ***,the lamellar architecture could not only induce sig-nificant stress redistribution and crack deflection between Ti_(2)AlC and TiAl,but also generate high-density SFs and DTs interactions in TiAl,leading to an improved strength and strain hardening *** addi-tion,profuse unique Ti_(2)AlC(1¯10¯3)/TiAl(111)interfaces in the composite could dramatically contribute to the strength and plasticity due to the interface-mediated dislocation nucleation and obstruction *** findings offer a promising paradigm for tailoring microstructure of TiAl matrix composites with extraordinary strength and plasticity at ambient temperature.

关键词： Ti_(2)AlC/TiAl composite Heterogeneous lamellar microstructure Micropillar compression Interface-mediated deformation Strength-plasticity synergy

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Wideband radar cross section reduction based on absorptive coding metasurface with compound stealth mechanism

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Chinese Physics B 2021年第10期30卷 274-282页

作者： Xinmi Yang Changrong Liu bo hou Xiaoyang Zhou School of Electronics and Information Engineering Soochow UniversitySuzhou 215006China State Key Laboratory of Millimeter Waves Nanjing 210096China School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou 215006China

A scheme of combing wave absorption and phase cancellation mechanisms for widening radar cross section(RCS)reduction band is *** absorptive coding metasurface implementing this scheme is derived from traditional circuit analog absorber(CAA)composed of resistive ring elements which characterize dual resonances *** is constructed by replacing some of the CAA elements by another kind of resistive ring elements which is singly resonant in between the original two resonant bands and has reflection phase opposite to that of the original elements at *** the developed metasurface achieves an improved low-RCS band over which the lower and higher sub-bands are mainly contributed by wave absorption mainly while the middle sub-band is formed by joint effect of wave absorption and antiphase cancellation *** polarization-independent wideband RCS reduction property of the metasurface is validated by full-wave simulation results of a preliminary and an advanced design examples which employ the same element configuration but different element layout schemes as partitioned distribution and random *** advanced design also exhibits broadband bistatic low-RCS property and keeps a stable specular RCS reduction performance with regard to incident elevation angle up to 35◦.The advanced design is fabricated and the experimental results of the sample agrees qualitatively well with their simulated *** measured figure of merit(i.e.,low-RCS bandwidth ratio versus electrical thickness)of the sample is 40.572,which is superior to or comparable with those for most of other existing metasurface with compound RCS reduction *** proposed compound metasurface technique also features simple structure,light weight,low cost and easy fabrication compared with other *** makes it promising in applications such as radar stealth and electromagnetic compatibility.

关键词： radar cross section(RCS)reduction coding metasurface wave absorption anti-phase cancellation

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