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四川建材 2024年第6期50卷 57-58页

作者：周宏博启东市东南桩基检测有限公司江苏南通226200

强夯是处理沿海滩涂冲填土地基的有效方法,而强夯加固后地基的检测是场地能否用于建设的重要依据。通过静载试验、静力触探原位测试、室内土工试验及轻型圆锥动力触探试验这4种方法联合检测强夯效果,并对4种方法进行对比分析,以供同类... 详细信息

强夯是处理沿海滩涂冲填土地基的有效方法,而强夯加固后地基的检测是场地能否用于建设的重要依据。通过静载试验、静力触探原位测试、室内土工试验及轻型圆锥动力触探试验这4种方法联合检测强夯效果,并对4种方法进行对比分析,以供同类型工程参考。

关键词：静载试验静力触探土工试验轻型圆锥动力触探

On the shear modulus and thermal effects during structural relaxation of a model metallic glass:Correlation and thermal decoupling

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Journal of Materials Science & Technology 2022年第8期103卷 144-151页

作者： hongbo zhou Vitaly Khonik Gerhard Wilde Institute of Materials Physics University of MuensterWilhelm-Klemm Str.10Muenster 48149Germany Department of General Physics Voronezh State Pedagogical UniversityLenin Str.86Voronezh 394043Russia

Pd_(40)Ni_(40)P_(20)(at.%)samples with different enthalpy states were fabricated through high-pressure torsion or sub-Tg annealing of the as-cast ***,the underlying structural relaxation was studied by in-situ shear modulus measurements and modulated differential scanning *** results show that high-pressure torsion leads to shear modulus softening and an increase of the nonreversible exothermic enthalpy,indicating a significant structural rejuvenation,while sub-Tg annealing causes shear modulus hardening and a decrease of the nonreversible exothermic *** reversible endothermic effect which can reflect the fractional change of supercooled liquid with temperature was found to be almost identical for all samples,and independent of deformation or thermal *** total heat flow can be well correlated with the shear modulus within the framework of interstitialcy ***,we demonstrate that the structural relaxation below Tg decouples into internal stress relaxation andβ-*** addition,this work indicates that the processes ofα-relaxation andβ-relaxation in the metallic glass are of similar structural origin but occur on different spatial scales.

关键词： Bulk metallic glass In-situ shear modulus Thermal properties Relaxation Interstitialcy theory

Effects of hydrogen in a vanadium grain boundary:From site occupancy to mechanical properties

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Science China(Physics,Mechanics & Astronomy) 2013年第7期56卷 1389-1395页

作者： zhou hongbo JIN Shuo YAN WenLi Department of Physics Beihang University

We have investigated site occupancy and mechanical properties of a vanadium (V) Σ 5(310)/[001] grain boundary (GB) with hydrogen (H) using a first-principles method. The segregation energy is calculated to be 0.29 eV for the energetically favora- ble V GB interstitial site, indicating that H energetically prefers to segregate into the V GB. We demonstrate that H can largely affect the mechanical properties of the V GB. The tensile strength and the Griffith fracture energy are reduced by approximately 13% (to 18.42 GPa) and 10% (to 1.74 J/m2) because of H segregation in comparison with that of the clean V GB, respectively. Our total energy calculations show that H acts as an embrittler to the V GB based on the Rice-Wang model. The atomic configurations and charge transfer analysis show that the segregated H weakens the surrounding interfacial V-V bonds, leading to the V GB mechanical properties degradation.

关键词： vanadium grain boundary hydrogen site occupancy mechanical properties first-principles

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某水库大坝渗流及结构稳定性分析

现代工程科技 2024年第18期3卷 53-56页

作者：周红波董志峰西安理工大学水利水电建筑勘测设计有限公司陕西西安710048 陕西省水工程勘察规划研究院陕西西安710003

水库枢纽工程设计中,大坝部分作为工程中不可缺少的部分,其设计中的工程布置、体型设计、坝体渗流稳定及结构稳定对后期工程建设影响巨大。而大坝工程设计中,坝体渗流稳定及结构稳定是重中之重。采用河海大学AutoBank有限元分析软件对... 详细信息

水库枢纽工程设计中,大坝部分作为工程中不可缺少的部分,其设计中的工程布置、体型设计、坝体渗流稳定及结构稳定对后期工程建设影响巨大。而大坝工程设计中,坝体渗流稳定及结构稳定是重中之重。采用河海大学AutoBank有限元分析软件对某水库大坝工程渗流稳定和结构稳定情况进行分析,得出工程在各个工况下渗流、结构稳定性等项目均满足规范要求的结论,证明本次大坝的材料选择、体型设计安全可靠。通过对各项数据展开分析,以保障大坝结构安全可靠,证明大坝设计理论上的可行性,为后期工程建设提供技术支撑。

关键词：大坝工程布置坝顶渗流及结构分析

First-principles study of carbon effects in a tungsten grain boundary:site preference, segregation and strengthening

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Science China(Physics,Mechanics & Astronomy) 2011年第12期54卷 2164-2169页

作者： zhou hongbo JIN Shuo ZHANG Ying LU GuangHong Department of Physics and Key Laboratory of Micro-nano Measurement-Manipulation and Physics （Ministry of Education） Beijing University of Aeronautics and Astronautics Beijing 100191 China

First-principles calculations have been performed to investigate energetics and site preference of carbon (C) in a tungsten (W) 5(310)/[001] grain boundary (GB). We calculate the solution energies of the C atom in the GB, which show that the interstitial C is energetically favored over the substitutional C. The segregation energy is calculated to be 3.95 eV for the energetically favorable GB interstitial site, indicating that C energetically prefers to segregate into the W GB. Based on the Rice-Wang model, our total energy calculations show that C has a significant beneficial effect on the W GB cohesion.

关键词： tungsten grain boundary carbon segregation first-principles

Microstructure, mechanical properties and deformation mechanisms of an as-cast Mg–Zn–Y–Nd–Zr alloy for stent applications

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Journal of Materials Science & Technology 2019年第7期35卷 1211-1217页

作者： Jianfeng Wang hongbo zhou Liguo Wang Shijie Zhu Shaokang Guan School of Materials Science and Engineering Zhengzhou University

A new Mg-2Zn-0.2Y -0.5N d-0.4Zr (wt%) alloy designed specially for stent applications has been developed. The as-cast alloy is featured with equiaxed grains with a mean size of about 40 μm and a small am ount of second phase (T phase) distributed discontinuously either at the grain boundaries or inside the grains. This alloy exhibits a tensile elongation of up to 35%, which is much larger than that of most reported other as-cast Mg alloys. The tensile deform ation mechanisms have also been investigated. The results show that, besides basal slip,{10-12} extension twining and non-basal pyramidal slips can also be observed at initial stage and later stage during tensile deform ation, respectively, which are responsible for the good room -tem perature ductility.

关键词： Magnesium alloys Vascular stents Microstructure Mechanical properties Deformation mechanisms

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基于模糊自适应PI的伺服控制系统设计

河北省科学院学报 2024年第3期41卷 49-54页

作者：隋海倬刘巍周洪波一汽-大众汽车有限公司吉林长春130011 中国电子科技集团公司第五十四研究所河北石家庄050081

本文分析了伺服控制三闭环调速的特点,介绍了模糊控制和PI控制系统。主要依据天线当前位置和速度采样反馈值,利用模糊控制原理对传统PI控制的比例、积分和微分参数进行在线整定,组成智能PI控制器,最后利用Matlab对控制系统进行仿真,得... 详细信息

本文分析了伺服控制三闭环调速的特点,介绍了模糊控制和PI控制系统。主要依据天线当前位置和速度采样反馈值,利用模糊控制原理对传统PI控制的比例、积分和微分参数进行在线整定,组成智能PI控制器,最后利用Matlab对控制系统进行仿真,得出仿真结果,并对仿真结果进行时域特性分析。

关键词：三闭环模糊自适应控制 PI控制 Matlab仿真

A Secure Mutual Authentication Scheme of Blockchain-Based in WBANs

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China Communications 2020年第9期17卷 34-49页

作者： Jianbo Xu Xiangwei Meng Wei Liang hongbo zhou Kuan-Ching Li School of Computer science and Engineering Hunan University of Science and TechnologyXiangtan 411201China College of Computer science and Electronic engineering Hunan UniversityChangsha 410082China School of Software Quanzhou University of Information engineeringQuanzhou 362000China Department of Computer Science and Information engineering Taichung 43301TaiwanChina

Wireless Body Area Networks(WBANs)refer to small sensor network that consists of sensor devices mounted on the surface of the body or implanted in the body,as such networks are employed to harvest physiological data of the human body or to act as an assistant regulator of several specific physiological indicators of the human *** sensor devices transmit the harvested human physiological data to the local node via a public *** transmitting data,the sensor device and the local node should perform mutual authentication and key *** is proposed in this paper a secure mutual authentication scheme of blockchain-based in *** analyze the security of this scheme,formal security analysis,and informal security analysis are used,then the computation and communication costs are compared with those of the relevant *** experimental results reveal that the proposed scheme exhibit more effective control over energy consumption and promising.

关键词： information security authentication blockchain WBANs Real-or-Random model

固定化异养硝化-好氧反硝化菌在污水生物强化中的研究进展

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水处理技术 2024年第3期50卷 13-19页

作者：程海娜储雪妍陈祝陈辉周洪波王玉光中南大学资源加工与生物工程学院湖南长沙410006

异养硝化-好氧反硝化(Heterotrophic nitrification-aerobic denitrification,HN-AD)菌可以在有机碳存在的好氧条件下实现同时硝化和反硝化,广泛应用于各类污水处理过程中。综述了HN-AD菌株的脱氮特性和代谢途径,总结了其在污水处理中... 详细信息

异养硝化-好氧反硝化(Heterotrophic nitrification-aerobic denitrification,HN-AD)菌可以在有机碳存在的好氧条件下实现同时硝化和反硝化,广泛应用于各类污水处理过程中。综述了HN-AD菌株的脱氮特性和代谢途径,总结了其在污水处理中的应用和研究现状,比较了不同载体材料的优缺点,重点讨论了固定HN-AD菌株提高反应器处理效果和稳定性的作用机理。最后,展望了固定化HN-AD菌株在污水处理中面临的挑战和未来的研究方向。

关键词：异养硝化-好氧反硝化微生物固定化技术生物脱氮污水处理