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Journal of Bionic Engineering 2023年第6期20卷 2774-2785页

作者： Longsheng Lu Guoxiang Jiang kaikai li Yingxi Xie Jiao Gao School of Mechanical&Automotive Engineering South China University of TechnologyGuangzhou510641China Shien-Ming Wu School of Intelligent Engineering South China University of TechnologyGuangzhou511442China

Learning hydrophobic phenomena from nature is always a promising approach to design the superhydrophobic *** orchid leaf which processes superhydrophobicity is an ideal plant model,and through mimicking its structure,the surface with excellent hydrophobicity is able to be ***,the unclear of the diversity in wettability during the different vegetation stages and the absence of its relation to the surface morphology limits the further enhancement of the inspired ***,we analyze the wettability difference as the leaf grows from tender to mature and then to *** with the variation of surface morphology and chemical composition,the well-developed micro-scale basic unit bumps with dense nano-scale waxy layer on the surface are proven to be responsible for the best hydrophobicity of the mature *** presence of the undeveloped or damaged micro-nano hierarchical structure reduces the formation of air pockets at the interface,leading to the decrease of the wettability for leaves at other ***,by fabricating artificial leaves,the nano-waxy layer is proved to be more effective than that of the micro-bumps on the surface *** results of study are of a great significance for guiding the design and fabrication of plant-inspired bionic superhydrophobic surface.

关键词： Superhydrophobicity Surface morphology Micro-nano hierarchical structure Purple orchid leaf Bionic

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高强度螺栓施拧工具控制系统设计

自动化仪表 2024年第5期45卷 55-59页

作者：李凯凯张承瑞胡斌史兰贺山东大学机械工程学院山东济南250061 济南中兴达电动工具有限公司山东济南250013

为了使高强度螺栓施拧工具能够满足施工现场对扭矩控制精度以及对工具多样化的需求,设计了基于STM32的高强度螺栓施拧工具控制系统。控制系统采用一体化设计。硬件具有应变片接口和霍尔传感器接口。软件对应开发扭矩控制和转角控制双重... 详细信息

为了使高强度螺栓施拧工具能够满足施工现场对扭矩控制精度以及对工具多样化的需求,设计了基于STM32的高强度螺栓施拧工具控制系统。控制系统采用一体化设计。硬件具有应变片接口和霍尔传感器接口。软件对应开发扭矩控制和转角控制双重可配置模式,以控制螺栓精准施拧。控制器配备数据上传功能,方便数据化管理、追溯工具和螺栓信息。此外,开发标定功能、故障检测功能、人机交互等功能,以进一步满足施工需求、降低施工难度。该控制系统体积紧凑、控制精度高、响应速度快、功能丰富。在标准扭矩仪测试过程中,施拧工具能够保证±4%以内的控制精度。该设计为市场同类铁路桥梁建设工具的设计提供了参考。

关键词：高强度螺栓施拧工具控制系统一体化应变片霍尔传感器

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304不锈钢丝镀铜表面氧化腐蚀行为研究

山东化工 2024年第11期53卷 36-38页

作者：伏伍孙鹏孟文妍李凯凯王莹西安菲尔特金属过滤材料股份有限公司陕西西安710201 西北有色金属研究院金属多孔材料国家重点实验室陕西西安710016

使用金相显微镜、扫描电镜、能谱分析等手段对304不锈钢电镀铜丝表面氧化以及氯离子对镀铜丝的点腐蚀进行了研究,结果表明:在空气环境自然氧化条件下,镀铜丝表面氧化物有Cu_(2)O,CuO,Cu_(2)(OH)_(2)CO_(3)等,三种物质调和出十分复杂的... 详细信息

使用金相显微镜、扫描电镜、能谱分析等手段对304不锈钢电镀铜丝表面氧化以及氯离子对镀铜丝的点腐蚀进行了研究,结果表明:在空气环境自然氧化条件下,镀铜丝表面氧化物有Cu_(2)O,CuO,Cu_(2)(OH)_(2)CO_(3)等,三种物质调和出十分复杂的镀铜丝表面氧化颜色;镀铜层的表面疏松粗糙会增进表面氧化。氯离子质量分数含量为6.27%时,镀铜丝铜层表面被腐蚀,没有腐蚀到不锈钢基体;氯离子质量分数含量为17.17%时,镀铜不锈钢丝基体完全腐蚀,镀铜丝腐蚀断裂。镀铜丝表面在35℃以上空气环境中点腐蚀严重,在25℃以下没有出现腐蚀。

关键词：镀铜表面氧化腐蚀

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三叠系油藏堵驱结合技术的探索应用

石油化工应用 2024年第1期43卷 50-53页

作者：安然刘旭华李凯凯钱雄涛董传宾中国石油长庆油田分公司第六采油厂陕西西安710000

针对胡尖山油田三叠系油藏储层非均质性强、注入水波及范围小、驱替效率低且多轮次调剖调驱效果减弱等问题,以H4区油藏为研究对象,基于前期矿场试验效果,优选近井调剖封堵体系与纳米微球深部调驱体系相结合,充分发挥协同治理优势。结果... 详细信息

针对胡尖山油田三叠系油藏储层非均质性强、注入水波及范围小、驱替效率低且多轮次调剖调驱效果减弱等问题,以H4区油藏为研究对象,基于前期矿场试验效果,优选近井调剖封堵体系与纳米微球深部调驱体系相结合,充分发挥协同治理优势。结果表明,堵驱结合技术在非均质油藏中具有较好的控水增油适应性,对应油井见效率、含水率下降幅度、平均单井增油量均优于单一体系,为同类型油藏调剖调驱体系组合优化提供借鉴参考。

关键词：堵驱结合工艺优化扩大波及体积控水增油

Enhancing Strength-Ductility Synergy of CoCrNi-Based Medium-Entropy Alloy Through Coherent L1_(2)Nanoprecipitates and Grain Boundary Precipitates

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 78-88页

作者： Leilei li kaikai Song Qingwei Gao Changshan Zhou Xiaoming liu Yaocen Wang Xiaojun Bai Chongde Cao School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an710016China Weihai Research Institute of Industrial Technology Shandong UniversityWeihai264209China Research and Development Institute of Northwestern Polytechnical University in ShenzhenShenzhen518057China

The L1_(2)-strengthened Co_(34)Cr_(32)Ni_(27)Al_(4)Ti_(3)medium-entropy alloy(MEA)with precipitations of grain boundaries has been developed through selective laser melting(SLM)followed by cold rolling and annealing,exhibiting excellent strength-ductility *** as-printed alloy exhibits low yield strength(YS)of~384 MPa,ultimate tensile strength(UTS)of~453 MPa,and uniform elongation(UE)of 1.5%due to the existence of the SLM-induced *** cold rolling and annealing,the YS,UTS,and UE are significantly increased to~739 MPa,~1230 MPa,and~47%,*** enhancement primarily originates from the refined grain structure induced by cold rolling and *** presence of coherent sphericalγ'precipitates(L1_(2)phases)and Al/Ti-rich precipitates at the grain boundaries,coupled with increased lattice defects such as dislocations,stacking faults,and ultrafine deformation twins,further contribute to the property’s *** study highlights the potential of SLM in producing high-strength and ductile MEA with coherent L1_(2)nanoprecipitates,which can be further optimized through subsequent rolling and annealing *** findings offer valuable insights for the development of high-performance alloys for future engineering applications.

关键词： Medium-entropy alloy Selective laser melting Precipitation Strength Ductility

基于光学法的水下爆炸冲击波流场压强测量与分析

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现代应用物理 2024年第2期15卷 149-154页

作者：郭权势卢强方厚林丁洋李凯凯陶思昊白武东强脉冲辐射环境模拟与效应全国重点实验室西安710024 西北核技术研究所西安710024

针对水下爆炸流场多参数测量,发展了基于OpenCV图像处理技术的光学法,对水下爆炸实验中冲击波超压进行测量并与理论和数值结果作对比。发现基于OpenCV图像处理技术的光学法能够较好地实现冲击波阵面的捕获与超压测量并实现冲击波传播过... 详细信息

针对水下爆炸流场多参数测量,发展了基于OpenCV图像处理技术的光学法,对水下爆炸实验中冲击波超压进行测量并与理论和数值结果作对比。发现基于OpenCV图像处理技术的光学法能够较好地实现冲击波阵面的捕获与超压测量并实现冲击波传播过程、爆轰产物发展等流场信息的获取,可为光学法在水下爆炸实验中的应用提供借鉴参考。

关键词：水下爆炸冲击波超压 OpenFOAM OpenCV 毁伤测量光学法

1.54 μm photoluminescence enhancenment of Er^(3+) -doped ZnO films containing nc-Ge: joint effect from Er^(3+) local environment changing and energy transfer of nc-Ge

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Photonics Research 2017年第6期5卷 86-89页

作者： RANRAN FAN FEI LU kaikai li School of Information Science and Engineering Shandong University

ZnO films containing Er and Ge nanocrystals(nc-Ge) were synthesized and their photoluminescence(PL) properties were studied. Visible and near-infrared PL intensities are found to be greatly increased in nc-Ge-containing film. Er-related 1.54 μm emission has been investigated under several excitation conditions upon different kinds of Ge, Er codoped ZnO thin films. 1.54 μm PL enhancement accompanied by the appearance of nc-Ge implies a significant correlation between nc-Ge and PL emission of Er^(3+). The increased intensity of 1.54 μm in Ge:Er:ZnO film is considered to come from the joint effect of the local potential distortion around Er^(3+)and the possibleenergy transfer from nc-Ge to Er^(3+).

关键词： local environment changing and energy transfer of nc-Ge ZnO

Parallel Implementation of the Non-Overlapping Template Matching Test Using CUDA

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China Communications 2020年第8期17卷 234-241页

作者： kaikai li Jianguo Zhang Pu li Anbang Wang Yuncai Wang Key Lab of Advanced Transducers and Intelligent Control System(Taiyuan University of Technology) Ministry of Education&Shanxi ProvinceTaiyuan 030024China College of Information Engineering Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Photonics Information Technology Guangdong University of TechnologyGuangzhou 510006China

NIST(National Institute of Standards and Technology) statistical test recognized as the most authoritative is widely used in verifying the randomness of binary sequences. The Non-overlapping Template Matching Test as the 7 th test of the NIST Test Suit is remarkably time consuming and the slow performance is one of the major hurdles in the testing process. In this paper, we present an efficient bit-parallel matching algorithm and segmented scan-based strategy for execution on Graphics Processing Unit(GPU) using NVIDIA Compute Unified Device Architecture(CUDA). Experimental results show the significant performance improvement of the parallelized Non-overlapping Template Matching Test, the running speed is 483 times faster than the original NIST implementation without attenuating the test result accuracy.

关键词： random numbers CUDA non-overlapping template matching test parallel implementation NIST test

Discovery of SPICE and carbon isotope stratigraphic correlation of the Cambrian Furongian Series in Tarim Craton, NW China

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Science China Earth Sciences 2020年第9期63卷 1330-1338页

作者： Yongquan CHEN Yanqiu ZHANG Yasheng WU Peng ZHOU kaikai li Xiaoxue WANG Petroleum Exploration and Development Institute Tarim Oil CompanyPetrochinaKorla 841000China Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China School of Energy and Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment Mechanism Ministry of EducationBeijing 100083China

The Furongian Series of the Cambrian in the Tarim Craton(NW China)is mainly composed of crystalline dolostones,and is an important target for oil and gas *** chronostratigraphic framework of the Furongian Series in the Tarim Craton has not yet been established due to the scarcity of fossils and the absence of the Steptoean Positive Carbon Isotope Excursion(SPICE),which is the primary global carbon isotope excursion of the Furongian *** this study,the SPICE was discovered by examining the carbon isotopes of the representative drilling wells in the West Platform and East Basin.A positive carbon isotope anomaly withδ13C values ranging from 1.5‰to 1.9‰(PDB),were found in the middle of the Xiaqiulitag Formation of the three drilling wells in the West Platform,and a positive excursion withδ13C values up to 4.0‰(PDB),which is correlated with the SPICE,was found in the lower limestone of the Tuershaketag Formation in the East *** on the carbon isotopic data and chemostratigraphic correlation,the chronostratigraphic framework of the Furongian Series across different facies in the Tarim Craton is preliminarily *** basal boundary of the Furongian Series was preliminarily defined by the occurrence of the *** positive anomaly ofδ13C was observed at the base of the Penglaiba Formation of the three boreholes in the West Platform and the top of the Tuershaketag Formation of Tadong-2 *** propose that the positive anomaly of the carbon isotope above the weak negative anomaly at the base of the Penglaiba Formation and the top of the Tuershaketag Formation can be used to define the Cambrian-Ordovician boundary in the Tarim Craton.

关键词： Tarim craton Cambrian Furongian series SPICE Carbon isotope stratigraphy

Ultrasonic vibration enabled under-liquid forming of metallic glasses

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Science Bulletin 2024年第2期69卷 163-166页

作者： Xin li Luyao li Sajad Sohrabi Jia'nan Fu Zhen li Zhe Chen Rongce Sun Yu Zhang Jinbiao Huang Heting Zhang Jian Zhu Xiangyan Chen kaikai Song Jiang Ma School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China State Key Laboratory of Radio Frequency Heterogeneous Integration College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Research Institute of Shandong University Shenzhen 518057China

Advancements in forming technology offer significant advantages for the manufacturing industry,including enhanced efficiency,energy conservation,and improved material utilization[1].However,traditional additive manufacturing[2],thermoplastic forming[3],and laser cutting[4]encounter challenges when applied in under-liquid environments,mainly due to difficulties in temperature control and heat source provision.

关键词： glasses liquid metallic