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功能梯度材料声子晶体低频带隙特性研究

噪声与振动控制 2024年第5期44卷 75-81页

作者：李淑琴宋京任景舜侯彪合肥工业大学汽车与交通工程学院合肥230009

声子晶体作为一种减振降噪的结构已经在建筑、土木等领域被广泛应用。基于局域共振声子晶体理论在前期研究的基础上对一种含二维变化功能梯度材料的声子晶体进行优化设计,并通过有限元数值仿真研究该声子晶体的减振性能。结果表明:功能... 详细信息

声子晶体作为一种减振降噪的结构已经在建筑、土木等领域被广泛应用。基于局域共振声子晶体理论在前期研究的基础上对一种含二维变化功能梯度材料的声子晶体进行优化设计,并通过有限元数值仿真研究该声子晶体的减振性能。结果表明:功能梯度材料声子晶体能带结构在0~1000Hz内共有3条完全带隙,其第一禁带的起始频率约为0,第三禁带截止频率为991.36Hz,总禁带宽度为990.85 Hz,在该带隙范围内占比为99.08%,并且在X方向上对该声子晶体10×5个周期进行传输特性分析,分析结果完全验证了禁带的存在,证明含二维变化功能梯度材料的声子晶体能有效抑制0~1000 Hz的弹性波,最后将含功能梯度材料声子晶体与传统声子晶体进行对比分析,验证了功能梯度材料声子晶体的减振性能。研究结果可为土木交通工程减振降噪提供一种新的设计方法。

关键词：声学声子晶体功能梯度材料二维仿真禁带有限元法

船舶柴油机主轴承温度过高问题的处置及预防工作方案

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内燃机 2024年第3期40卷 65-70页

作者：侯彪司萌邹恺恺海军士官学校安徽蚌埠233012

船舶柴油机在使用过程中,主轴承突发故障时有发生,主要表现现象为主轴承温度过高。如未能及时有效处理,将严重影响柴油机的正常运行。本文从故障机理的角度出发,研究主轴承温度过高的各项成因,并分析故障的各种表现形式。基于滑油温度... 详细信息

船舶柴油机在使用过程中,主轴承突发故障时有发生,主要表现现象为主轴承温度过高。如未能及时有效处理,将严重影响柴油机的正常运行。本文从故障机理的角度出发,研究主轴承温度过高的各项成因,并分析故障的各种表现形式。基于滑油温度过高、滑油压力过低或无压力、曲轴箱中出现异常敲击声等主要的附加故障特征,本文分析故障发生后的主要危害,重点探讨故障的处置流程和排除方法,进而提出故障预防方案,为船舶柴油机的安全使用与维护提供理论依据。

关键词：柴油机主轴承高温解决方案

Anchoring eccentricity features and rectifying devices for resin grouted bolt/cable bolt

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International Journal of Mining Science and Technology 2022年第5期32卷 1059-1073页

作者： Shaowei Liu Deyin He housheng Jia Mengxiong Fu biao hou School of Energy Science and Engineering Henan Polytechnic UniversityJiaozuo 454000China State Collaborative Innovation Center of Coal Work Safety and Clean-Efficiency Utilization Jiaozuo 454000China

The anchoring eccentricity of the bolt and cable bolt is a common problem in geotechnical support engineering and affects the ability of the bolt and cable bolt to control the rock mass to a certain *** paper reports on numerical simulation and laboratory experiments conducted to clarify the effect of eccentricity on the anchoring quality of the bolt and cable bolt,and to establish an effective solution *** results reveal that the anchoring eccentricity causes unbalanced stress distribution and the uncoordinated deformation of the resin layer,which results in higher stress and greater deformation of the resin layer at the near side of the rod ***,as the degree of anchoring eccentricity increases,the effect becomes more significant,and the resin layer of the anchoring system becomes more likely to undergo preferential failure locally,which weakens the load-bearing performance of the anchoring *** paper develops an innovative bolt anchoring rectifying device(B-ARD)and cable bolt anchoring rectifying device(C-ARD)on the basis of the structural characteristics of the bolt and cable bolt to better ensure the anchoring effect of *** working effects of these two devices were verified in detailed experiments and *** experimental results show that the anchoring rectifying devices(ARD)improve and ensure the anchoring concentricity of the bolt and cable bolt,which will help improve the supporting performance of *** paper provides a convenient and effective method for improving the anchoring concentricity of the bolt and cable bolt,and provides a concept and reference for technical research on improving the effect of roof bolting.

关键词： Anchoring eccentricity features Rectifying device Roof bolting Anchoring system performance

高校科研实验室文化建设在创新人才培养中的探索与实践——以智能感知与图像理解教育部重点实验室为例

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西安电子科技大学学报（社会科学版） 2024年第2期34卷 103-107页

作者：张丹王鑫侯彪焦李成西安电子科技大学人工智能学院陕西西安710071 智能感知与图像理解教育部重点实验室陕西西安710071

高校科研实验室是科技创新和人才培养的重要载体,是“双一流”建设的重要支撑。实验室文化建设是实验室的精神内涵,该工作以学生为核心,从提升科学素养、激发探索欲望、培养创新精神、增强实践能力四个方面逐层展开,是建设优质育人环境... 详细信息

高校科研实验室是科技创新和人才培养的重要载体,是“双一流”建设的重要支撑。实验室文化建设是实验室的精神内涵,该工作以学生为核心,从提升科学素养、激发探索欲望、培养创新精神、增强实践能力四个方面逐层展开,是建设优质育人环境不可分割的重要组成部分。本文针对“培养什么人”这一基本问题提出了“如何培养创新人才”,从精神引领、制度建设和创新领航三个方面进行了探讨,同时分享了智能感知与图像理解教育部重点实验室在文化建设方面的探索与实践,以期为实验室文化建设提供参考和借鉴。

关键词：实验室文化建设创新人才培养精神引领制度建设创新领航

维普期刊数据库博看期刊

Sb^(3+)and Sm^(3+)co-doped lead-free Cs_(2)NaInCl_(6)double perovskite nanocrystals for single-component cold white emitter

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Journal of Rare Earths 2024年第9期42卷 1646-1651,I0001页

作者： biao Zhou Xiangtong Zhang Ranran Hu Ruixue hou William W.Yu Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Centre for High-Efficiency Display and Lighting TechnologySchool of Materials and EngineeringCollaborative Innovation Centre of Nano Functional Materials and ApplicationsHenan UniversityKaifeng475000China School of Chemistry and Chemical Engineering Shandong UniversityJinan250100China

Metal halide perovskites exhibit promising prospect in light-emitting diodes,solar cells,photodetectors and ***,the workhorse of metal halide perovskites relies on toxicity lead element,which severely damages human body and *** lead-free perovskites,Cs_(2)NaInCl_(6)double perovskite is one of the most promising candidates because of its great stability and easy synthesis,but suffers inadequate optical ***,we doped Sb^(3+)and Sm^(3+)into Cs_(2)NaInCl_(6)nanocrystals by a hot injection ***_(2)NaInCl_(6):Sb^(3+)exhibits blue emission at 447 ***_(2)NaInCl_(6):Sm^(3+),Sb^(3+)nanocrystals simultaneously generate the blue emission of Sb^(3+)and the multiple emissions of Sm^(3+)at 565,602,650 and 710 *** the increase of Sm^(3+)feed ratio,the emission color of Cs_(2)NaInCl_(6):Sm^(3+),Sb^(3+)gradually moves to cold white region at(0.27,0.28)in CIE chromaticity diagram and correlated color temperature of 11840 *** work shows the potential application of Cs_(2)NaInCl_(6):Sm^(3+),Sb^(3+)nanocrystals as a single-component cold white emitter.

关键词： Lead-free Double perovskites Single component White emitter Doping Rare earths

Higgs and Bottom Quarks Associated Production at High Energy Colliders in the Littlest Higgs Model with T-Parity

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Communications in Theoretical Physics 2018年第3期69卷 297-302页

作者： biao-Feng hou Hua-Ying Zhang Heng-Heng Bi College of Physics and Materials Science Henan Normal University Xinxiang 453007 China

In the littlest Higgs Model with T-parity,we discuss the Higgs production in association with bottom quarks at the LHC and future electron-positron *** calculate the cross sections of production channels pp→bb H,bb→H and bg→b H at 14 Te V LHC and the cross sections of production channel e^+e^-→bb H in(un)polarized beams at the lowest *** order to investigate the observability,we display some typical final state distributions in the Higgs to diphoton channel.

关键词： Higgs boson bottom quark littlest Higgs model with T-parity

Herb pair of Huangqi-Danggui exerts anti-tumor immunity to breast cancer by upregulating PIK3R1

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Animal Models and Experimental Medicine 2024年第3期7卷 234-258页

作者： Hai-Xin Liu Li Lian Li-Li hou Cai-Xia Liu Jin-Hong Ren Yuan-biao Qiao Shi-Yuan Wen Qing-Shan Li College of Traditional Chinese Medicine and Food Engineering Shanxi University of Chinese MedicineTaiyuanChina Shanxi Key Laboratory of Innovative Drug for the Treatment of Serious Diseases Basing on the Chronic Inflammation College of Traditional Chinese Medicine and Food EngineeringShanxi University of Chinese MedicineTaiyuanChina College of Basic Medical Sciences Shanxi Medical UniversityTaiyuanChina

Background:According to traditional Chinese medicine(TCM),drugs supplementing the vital energy,Qi,can eliminate tumors by restoring host *** objective of this study is to investigate the underlying immune mechanisms of anti-tumor activity associated with Qi-supplementing herbs,specifically the paired use of Huangqi and ***:Analysis of compatibility regularity was conducted to screen the combination of Qi-supplementing *** the MTT assay and a transplanted tumor mice model,the anti-tumor effects of combination TCMs were investigated in vitro and in *** content analysis and flow cytometry were then used to evaluate cellular immunity,followed by network pharmacology and molecular docking to dissect the significant active compounds and potential ***,the anti-tumor activity and the mechanism of the active ingredients were verified by molecular ***:There is an optimal combination of Huangqi and Danggui that,administered as an aqueous extract,can activate immunity to suppress tumor and is more effective than each drug on its own in vitro and in *** on network pharmacology analysis,PIK3R1 is the core target for the anti-tumor immunity activity of combined Huangqi and *** docking analysis shows 6 components of the combined Danggui and Huangqi extract(quercetin,jaranol,isorhamnetin,kaempferol,calycosin,and suchilactone)that bind to *** is the most important component against breast *** suchilactone/jaranol combination and,especially,the suchilactone/kaempferol combination are key for immunity enhancement and the anti-tumor effects of the ***:The combination of Huangqi and Danggui can activate immunity to suppress breast cancer and is more effective than the individual drugs alone.

关键词： anti-tumor Danggui Huangqi immunity

Proof of Aerobically Autoxidized Self-Charge Concept Based on Single Catechol-Enriched Carbon Cathode Material

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Nano-Micro Letters 2024年第4期16卷 1-13页

作者： Junyan Wang Wanchun Guo Kesong Tian Xinta Li Xinyu Wang Panhua Li Yu Zhang Bosen Zhang biao Zhang Shuhu Liu Xueai Li Zhaopeng Xu Junjie Xu Haiyan Wang Yanglong hou State Key Laboratory of Metastable Materials Science and Technology Hebei Key Laboratory of Heavy Metal Deep‑Remediation in Water and Resource ReuseSchool of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004People’s Republic of China Beijing Key Laboratory for Magnetoelectric Materials and Devices Beijing Innovation Centre for Engineering Science and Advanced TechnologySchool of Materials Science and EngineeringPeking UniversityBeijing 100871People’s Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People’s Republic of China Xi’an Rare Metal Materials Institute Co.Ltd Xi’an 710016People’s Republic of China

The self-charging concept has drawn considerable attention due to its excellent ability to achieve environmental energy harvesting,conversion and storage without an external power ***,most self-charging designs assembled by multiple energy harvesting,conversion and storage materials increase the energy transfer loss;the environmental energy supply is generally limited by climate and meteorological conditions,hindering the potential application of these selfpowered devices to be available at all *** on aerobic autoxidation of catechol,which is similar to the electrochemical oxidation of the catechol groups on the carbon materials under an electrical charge,we proposed an air-breathing chemical self-charge concept based on the aerobic autoxidation of catechol groups on oxygen-enriched carbon materials to ortho-quinone *** harvesting,conversion and storage functions could be integrated on a single carbon material to avoid the energy transfer loss among the different ***,the assembled Cu/oxygen-enriched carbon battery confirmed the feasibility of the air-oxidation self-charging/electrical discharging mechanism for potential *** air-breathing chemical self-charge concept could facilitate the exploration of high-efficiency sustainable air self-charging devices.

关键词： Carbon material Oxygen functionality Air oxidation self-charge

宇宙射线中子法土壤水分监测在不同生态系统雨季的适用性

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气象科技 2024年第1期52卷 1-9页

作者：石耀辉王海龙朱永超吴东丽丁明明勾秋磊侯飙张全军刘聪杨大生张静中国气象局气象探测中心北京100081 北京市气象探测中心北京100176 河北省张家口市万全区气象局张家口076250 黑龙江省气象数据中心哈尔滨150030

宇宙射线中子法是目前测量中尺度土壤水分的一种新兴方法,通过监测近地表附近中子的数量来监测土壤含水率,理论探测深度12~76 cm。为了评估宇宙射线中子法土壤水分监测在草地、农田和林地3种不同生态系统测量深度适用性和对降水的敏感... 详细信息

宇宙射线中子法是目前测量中尺度土壤水分的一种新兴方法,通过监测近地表附近中子的数量来监测土壤含水率,理论探测深度12~76 cm。为了评估宇宙射线中子法土壤水分监测在草地、农田和林地3种不同生态系统测量深度适用性和对降水的敏感性。本研究分析了中国气象局自动土壤水分站观测数据和遥感土壤水分监测数据与宇宙射线中子法土壤水分监测数据差异性和相关性。结果显示,宇宙射线中子法土壤水分监测草地0~20 cm效果最优,农田和林地0~30 cm最优;在农田和林地生态系统土壤水分监测结果与自动土壤水分站点差异较小,优于遥感监测;但对于草地生态系统,宇宙射线中子法土壤水分监测结果与遥感监测结果差异比单点自动土壤水分站点监测更小,可能与草地土壤的强异质性有关。宇宙射线中子法土壤水分监测在草地、农田和林地生态系统均可以敏感的响应降水事件,较点尺度自动土壤水分站更易捕捉到区域水分的波动性变化。

关键词：宇宙射线中子法土壤水分降水测量深度适用性