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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 960-968页

作者： YUE Yi LI Hong CAO Xiuhua ZHANG xuehui HUANG Jun HUANG xuye ZHANG Yongqiang xu ruipeng XIONG Dehua State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Guangdong Fenghua Advanced Technology Holding Co.Ltd. Zhaoqing 526000China

B_(2)O_(3)-Zn O-SiO_(2)(BZS)glass containing Cu O with excellent acid resistance,wetting properties,and high-temperature sintering density was prepared by high temperature melting method and then applied in copper terminal electrode for multilayer ceramic capacitors(MLCC)*** structure and property characterization of B_(2)O_(3)-Zn O-SiO_(2)glass,including X-ray diffraction,FTIR,scanning electron microscopy,high-temperature microscopy,and differential scanning calorimetry,indicated that the addition of CuO improved the glass’s acid resistance and glass-forming *** wettability and acid resistance of this glass were found to be excellent when CuO content was 1.50 wt%.Compared to BZS glass,the CuO-added glass exhibited excellent wettability to copper powder and corrosion resistance to the plating *** sintered copper electrode films prepared using the glass with CuO addition had better densification and lower sintering temperature of 750℃.Further analysis of the sintering mechanism reveals that the flowability and wettability of the glass significantly impact the sintering densification of the copper terminal electrodes.

关键词： B_(2)O_(3)-ZnO-SiO_(2)(BZS) low melting glass MLCC densification copper terminal electrode

Applied in Multilayer Ceramic Capacitors Preparation of B2O3-ZnO-SiO2 Glass and Sintering Densification of Copper Terminal Electrode

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期 960-968页

作者：乐毅李宏曹秀华 ZHANG xuehui HUANG Jun HUANG xuye ZHANG Yongqiang xu ruipeng XIONG Dehua State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Guangdong Fenghua Advanced Technology Holding Co.Ltd.

B2O3-Zn O-SiO2(BZS) glass containing Cu O with excellent acid resistance,wetting properties,and high-temperature sintering density was prepared by high temperature melting method and then applied in copper terminal electrode for multilayer ceramic capacitors (MLCC) *** structure and property characterization of B2O3-Zn O-SiO2glass,including X-ray diffraction,FTIR,scanning electron microscopy,high-temperature microscopy,and differential scanning calorimetry,indicated that the addition of CuO improved the glass’s acid resistance and glass-forming *** wettability and acid resistance of this glass were found to be excellent when Cu O content was 1.50 wt%.Compared to BZS glass,the Cu O-added glass exhibited excellent wettability to copper powder and corrosion resistance to the plating *** sintered copper electrode films prepared using the glass with Cu O addition had better densification and lower sintering temperature of 750℃.Further analysis of the sintering mechanism reveals that the flowability and wettability of the glass significantly impact the sintering densification of the copper terminal electrodes.

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全景照度理论及其测量模拟

光学学报 2021年第5期41卷 38-43页

作者：夏岭张婷婷王雨荻许瑞鹏河海大学物联网工程学院江苏特种机器人研究重点实验室江苏常州213022

不同于传统照明中对平面照度的测量,全景照度是一种对空间中可视物体整体照亮程度进行评价的参数。关于其测量方法,在介绍现有的基于照度计在六个维度上测量数值的近似估算法之外,提出了一种基于高动态范围全景图的亮度分布球函数分解法... 详细信息

不同于传统照明中对平面照度的测量,全景照度是一种对空间中可视物体整体照亮程度进行评价的参数。关于其测量方法,在介绍现有的基于照度计在六个维度上测量数值的近似估算法之外,提出了一种基于高动态范围全景图的亮度分布球函数分解法,并利用球形光源模型对这两种测量方法的准确性进行了比较。结果表明,相比前一种方法,后一种方法具有更强的鲁棒性,并将推动利用身边的数码设备对全景照度进行测量。

关键词：测量环境光水平照度全景照度整体照亮程度测量方法

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三岔T形枢纽互通立交方案设计及比选

黑龙江交通科技 2024年第2期47卷 110-113,118页

作者：徐瑞鹏苏交科集团(甘肃)交通规划设计有限公司甘肃兰州730030

枢纽互通式立交应满足高速公路之间交通流转换的功能需要,因此要根据其在路网中的交通功能,结合交通量、地形条件、技术指标、工程规模、服务水平等控制性因素进行多方案设计比选。以甘肃省S44康略高速与G8513平绵高速枢纽互通设计方案... 详细信息

枢纽互通式立交应满足高速公路之间交通流转换的功能需要,因此要根据其在路网中的交通功能,结合交通量、地形条件、技术指标、工程规模、服务水平等控制性因素进行多方案设计比选。以甘肃省S44康略高速与G8513平绵高速枢纽互通设计方案为例,从项目的功能定位和建设必要性及交通量预测等多角度分析方案一(T形内交叉)与方案二(T形左转弯匝道迂回型)的优劣,经综合比选,确认方案一更具整体优势。

关键词： T形枢纽互通立交方案比选

“全-半断面”工况下TBM贯入度影响因素分析

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中国安全科学学报 2023年第S02期33卷 202-208页

作者：许丙南赵新合陈良武李坤张文艳许瑞鹏中铁工程装备集团有限公司河南郑州450016 中铁工程装备集团技术服务有限公司河南郑州450016

为探究不同工况下硬岩隧道掘进机(TBM)贯入度的变化特征,以缙云抽水蓄能电站TBM法开挖排水廊道工程为例,分析隧道线路相交处施工工艺;分析TBM滚刀受力,建立单滚刀破岩模型,采用有限元分析软件探究滚刀破岩流程;根据现场实际掘进数据,对... 详细信息

为探究不同工况下硬岩隧道掘进机(TBM)贯入度的变化特征,以缙云抽水蓄能电站TBM法开挖排水廊道工程为例,分析隧道线路相交处施工工艺;分析TBM滚刀受力,建立单滚刀破岩模型,采用有限元分析软件探究滚刀破岩流程;根据现场实际掘进数据,对半断面-全断面工况下TBM掘进参数与岩石参数间关系进行了分析。研究结果表明:半断面掘进工况下,TBM贯入度随刀盘推力增加呈对数函数增长,随刀盘扭矩增加也呈对数函数增长;而全断面工况下,TBM贯入度随刀盘推力与刀盘扭矩增加分别呈现指数函数与线性函数增长趋势,且增长率均与岩石参数相关。

关键词：半断面-全断面工况隧道掘进机(TBM)贯入度岩石参数掘进参数回归分析

植物乳杆菌RG-034对大鼠腹泻型肠易激综合征的治疗作用

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现代药物与临床 2024年第4期39卷 816-825页

作者：徐冯莲许锐鹏张沂王子昱李煜龙陈贵浩方伟蓉中国药科大学基础医学与临床药学学院江苏南京210009 广东强基药业有限公司广东潮州515636

目的研究植物乳杆菌RG-034的体外抑菌效果以及对大鼠腹泻型肠易激综合征的治疗作用。方法采用活菌计数法测定RG-034菌粉活菌数,利用类“牛津杯法”确定植物乳杆菌RG-034对大肠埃希菌、乙型副伤寒沙门菌、金黄色葡萄球菌的抑菌活性。SD... 详细信息

目的研究植物乳杆菌RG-034的体外抑菌效果以及对大鼠腹泻型肠易激综合征的治疗作用。方法采用活菌计数法测定RG-034菌粉活菌数,利用类“牛津杯法”确定植物乳杆菌RG-034对大肠埃希菌、乙型副伤寒沙门菌、金黄色葡萄球菌的抑菌活性。SD大鼠按体质量随机分为对照组、模型组、蒙脱石散组及植物乳杆菌RG-034胶囊组,每组6只。除对照组外,其余大鼠每日ig5g/kg番泻叶联合隔日禁食,持续5周,制备大鼠腹泻型肠易激综合征模型。自造模第3周开始给药,植物乳杆菌RG-034组大鼠igRG-034胶囊(1×10^(9)CFU/粒,15mg),2粒/d;蒙脱石散组大鼠ig0.81g/kg蒙脱石散,1次/d;对照组和模型组大鼠ig等量生理盐水,给药3周。观察大鼠一般状态变化,测定稀便率、稀便级以及腹泻指数,采用16S核糖体RNA测序技术分析大鼠结肠中肠道菌群变化。结果植物乳杆菌RG-034菌粉活菌数为2.5×10^(11)CFU/g,对不同浓度的大肠埃希菌、乙型副伤寒沙门菌、金黄色葡萄球菌均有一定的抑制作用,抑菌圈直径为15.90~25.06mm。与模型组比较,植物乳杆菌RG-034胶囊可明显改善大鼠腹泻情况,显著降低稀便率、稀便级以及腹泻指数,增加了肠道菌群多样性。结论植物乳杆菌RG-034对大鼠腹泻型肠易激综合征具有一定的治疗作用,其机制可能与调节肠道菌群多样性有关。

关键词：植物乳杆菌RG-034 腹泻型肠易激综合征肠道菌群 16S rRNA高通量测序大肠埃希菌乙型副伤寒沙门菌金黄色葡萄球菌

基于ADAMS的V形复摆颚式破碎机产量研究

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矿山机械 2017年第2期45卷 32-35页

作者：浦宏毅徐敏杨瑞鹏云南省机械研究设计院云南昆明650031 云南省机电一体化应用技术重点实验室云南昆明650031 文山通用机械制造有限公司云南文山663000

新型V形复摆颚式破碎机的产量计算与传统机型有所不同。利用ADAMS运动学与动力学仿真设计软件,对PEV750×1060型复摆颚式破碎机进行仿真分析,根据不同偏心距对行程的影响绘制动颚行程变化曲线,分析其理论产量,并与实际生产数据进行对比... 详细信息

新型V形复摆颚式破碎机的产量计算与传统机型有所不同。利用ADAMS运动学与动力学仿真设计软件,对PEV750×1060型复摆颚式破碎机进行仿真分析,根据不同偏心距对行程的影响绘制动颚行程变化曲线,分析其理论产量,并与实际生产数据进行对比验证,得到了一组满足要求的设计参数,为V形复摆颚式破碎机的设计提供了实际指导。

关键词：颚式破碎机偏心距产量分析 ADAMS应用

Research Review of Principles and Methods for Ultrasonic Measurement of Axial Stress in Bolts

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Chinese Journal of Mechanical Engineering 2020年第1期33卷 44-59页

作者： Qinxue Pan ruipeng Pan Chang Shao Meile Chang Xiaoyu xu School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Fundamental Science for Advanced Machining Beijing Institute of TechnologyBeijing 100081China

Bolts are important fasteners indispensable in the manufacturing field for their advantages, which include convenient assembly and disassembly, easy maintenance, refastenability to prevent looseness, and the avoidance of a phase change in the connected material composition. The precise control of the tightening force in bolts is closely related to the safety and reliability of the connected equipment or structure. Although there are many methods for estimating the tightening force applied to a bolt during assembly, poor accuracy in controlling the preload during the tightening process and a lack of monitoring to determine the residual axial force in service remain issues in evaluating the safety of bolted assemblies. As a nondestructive testing technology, ultrasonic measurement can be applied to successfully address these issues. In order to help researchers understand the theoretical basis and technological development in this field and to equip them to conduct further in-depth research, in this review, the basic knowledge describing the state of stress and deformation of bolts, as well as conventional testing methods are summarized and analyzed. Then, through a review of recent research of the ultrasonic measurement of the axial stress in bolts, the influence of the e ective stressed length and temperature are analyzed and proposed methods of calibration and compensation are reviewed. In order to avoid coupling errors caused by traditional piezoelectric transducers, two newly proposed ultrasonic coupling technologies, the electromagnetic acoustic transducer(EMAT) and the permanent mounted transducer system(PMTS), are reviewed. Finally, the new direction of research of the detection of residual axial stress in in-service bolts that have been assembled to yield is discussed.

关键词： Bolted connections Axial stress Ultrasonic waves Influencing factors Coupling techniques

植物乳杆菌RG-034耐酸菌粉在大鼠结肠内容物中分布的研究

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药学与临床研究 2024年第4期32卷 304-307页

作者：张沂许锐鹏徐冯莲李煜龙陈贵浩方伟蓉中国药科大学基础医学与临床药学学院南京211198 广东强基药业有限公司广东潮州515636

目的:研究耐酸包埋技术对植物乳杆菌(***)RG-034在结肠中分布的作用。方法:通过菌株培养、发酵、离心和耐酸保护剂包埋制备*** RG-034耐酸菌粉,并测定耐酸后活菌数。雄性SD大鼠分别灌胃*** RG-034菌粉(1.0×10^(11)CFU)、*** RG-034耐... 详细信息

目的:研究耐酸包埋技术对植物乳杆菌(***)RG-034在结肠中分布的作用。方法:通过菌株培养、发酵、离心和耐酸保护剂包埋制备*** RG-034耐酸菌粉,并测定耐酸后活菌数。雄性SD大鼠分别灌胃*** RG-034菌粉(1.0×10^(11)CFU)、*** RG-034耐酸菌粉(3.05×10^(10)CFU),灌胃后6、12、24 h,检测大鼠小肠、结肠*** RG-034浓度。结果:制备的*** RG-034耐酸菌粉浓度为6.1×10^(10)CFU·g^(-1),体外耐酸后*** RG-034活菌数约为1.4×10^(10)CFU·g^(-1)。与空白对照组相比,菌粉组及耐酸菌粉组大鼠小肠和结肠肠段内容物中*** RG-034的浓度均有所升高。在结肠的分布中,菌粉给药6 h后已进入结肠,随后排出体外,给药后24 h浓度逐渐降低,而耐酸菌粉给药6 h后小肠中浓度高于结肠,12 h后结肠中浓度明显上升,24 h后结肠中浓度较高。结论:与*** RG-034菌粉组相比,L plantarum RG-034耐酸菌粉组***结肠浓度较高,提高了***在肠道中的活力。

关键词：植物乳杆菌RG-034 耐酸菌粉益生菌

Effect of Hot Isostatic Pressing Conditions and Cooling Rate on Microstructure and Properties of Ti-6Al-4V Alloy from Atomized Powder

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Journal of Materials Science & Technology 2014年第12期30卷 1289-1295页

作者： Lei xu ruipeng Guo Chunguang Bai Jiafeng Lei Rui Yang Institute of Metal Research Chinese Academy of Sciences School of Materials and Metallurgy Northeastern University

The effects of temperature and pressure on density, microstructure and mechanical properties of powder compacts during hot isostatic pressing（HIPping） were investigated. Optimized HIPping parameters of temperature range from 900 to 940℃, pressure over 100 MPa and holding time of 3 h, were obtained. Tensile properties after different heat treatments show that both the geometry of samples and cooling rate have a significant influence on mechanical properties. Finite element method was used to predict the temperature field distribution during HIPped sample cooling, and the experimental results are in agreement with simulation prediction. The interaction of HIPping parameters was analyzed based on the response surface methodology（RSM） in this study.

关键词： Hot isostatic pressing Ti-6Al-4V Cooling rate Microstructure Mechanical properties