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Reduction of die roll height in duplex gears through a sheet-bulk metal forming method

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Advances in Manufacturing 2019年第1期7卷 42-51页

作者： xiao-long sun Xin-Cun Zhuang Feng-Chun Yang Zhen Zhao Institute of Forming Technology and Equipment School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai 200030 People's Republic of China National Engineering Research Center of Die & Mold CAD Shanghai Jiao Tong University Shanghai 200030 People's Republic of China

In the existing shearing processes for fabricating parts such as duplex gears, die roll is difficult to avoid. Accordingly, a method based on sheet-bulk metal forming for fabricating a duplex gear with extremely small die roll in one stroke is proposed in the current work. The process could be divided into three stages according to the forming features: upsetting and shearing stage, lateral extrusion stage, and local filling stage. The die roll appeared in the shearing stage, which could be reduced in the subsequent extrusion and local filling stages. To reveal the underground mechanism, material flows under two situations, as a key factor to influence the forming quality, were compared and investigated. The results revealed that by controlling material flow, one could avoid the defects and reduce the die roll.

关键词： Die roll Duplex gear part Sheet-bulk metal forming Lateral extrusion Material flow

Artful union of a zirconium-porphyrin MOF/GO composite for fabricating an aptamer-based electrochemical sensor with superb detecting performance

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Chinese Chemical Letters 2021年第9期32卷 2851-2855页

作者： Hong-Kai Li Hai-Lin Ye xiao-Xue Zhao xiao-long sun Qian-Qian Zhu Zhang-Ye Han Rongrong Yuan Hongming He Tianjin Key Laboratory of Structure and Performance for Functional Molecules College of ChemistryTianjin Normal UniversityTianjin 300387China Department of Materials Science and Engineering Jilin Jianzhu UniversityChangchun 130118China

More and more attentions have been focused on design and synthesis of novel metal-organic framework/graphene oxide(MOF/GO)composites with unique ***-porphyrin MOF(PCN-222)is in-situ synthesis with the existence of GO with-COOH group to artfully fabricate a PCN-222/GO *** composite can be employed as functional material to modify the working *** to excellent electrical conductivity of GO,abundant mesoporous channels and numerous Zr(Ⅳ)metal sites of PCN-222,this composite can immobilize a large amount of aptamer through strongπ-πstacking interaction and high affinity between phosphate group of aptamer and Zr(Ⅳ)site of PCN-222 ***,an ultra-sensitive electrochemical aptasensor based on PCN-222/GO composite can quantificationally detect trace chloramphenicol with limit of detection of 7.04 pg/m L(21.79 pmol/L)from 0.01 ng/m L to 50 ng/m L by electrochemical impedance spectroscopy even in real ***,this fabricated aptasensor reveals good repeatability,outstanding selectivity and preferable long-term *** research provides a useful approach to construct MOF/GO composites for fabricating electrochemical aptasensors in the electrochemical detection field.

关键词： PCN-222/GO composite Aptamer Electrochemical aptasensor Chloramphenicol Electrochemical impedance spectroscopy

Effect of Incubation Temperature and Warming Solutions on the Viability and Maturation of Vitrified-thawed Human Immature Oocytes

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Journal of Reproduction and Contraception 2011年第2期22卷 65-74页

作者： Yu-ling HUANG xiao-lin long xiao-fang sun Yong FAN Hong-zi DU Wen-hong ZHANG Yu SHI Li LI Han-yan LIU Reproductive Center of the Third Affiliated Hospital of Guangzhou Medical College Guangzhou 510150 China

Objective To investigate the viability and maturation of frozen-thawed human immature oocytes exposed to different temperature of vitrification and warming solutions. Methods The immature oocytes in germinal vesicle （GV） and matephase I （MI ） stages were collected from our ICSI patients and exposed to different temperature of vitrification and warming solutions before frozen in the freezing/thawing procedures. The different temperature groups were as follows： Group A, equilibration solution at 37℃, vitrification solution at room temperature, warming solution at 37℃; Group B, both vitrification and warming solution at room temperature; Group C, both vitrification and warming solutions at 37℃; Group D, the frozen-thawed oocytes and the fresh oocytes were cultured for in vitro maturation. The survival rate and maturation rate were compared among groups. The oocytes were examined using immunofluorescent stainingand confocal microscopy to check the spindle configuration and chromosome arrangement. Results The survival rates and MII rates of GV stage oocytes in groups A, B, C were 100%（15/15）, 81.3%（13/16）, 68.8%（11/16） and 33.3%（2/6）, 83.3%（10/12）,72.7%（8/11）, respectively. The survival rate of group C was significantly lower than that of the control （P〈0.05）. The normal spindle and chromosome configuration were only observed in group B, with the rates of 20% （2/20） and 10% （1/10）, respectively. The survival rates of MI stage in groups A, B, C were 71.4%（10/14）, 100% （12/12） and 83.3%（10/12）, no significantly difference from that of the contro1（100%, 14/14）. The MII rates of MI stage in groups A, B and C were 0%（0/14）, 66.7%（8/12） and 80% （8/10）, respectively. The MⅡ rate in group A was significantly lower than that in other groups （P〈0.01）. Only one oocyte in group C was found with normal spindle and chromosome configurations. Conclusion The appropriate operation temperature of vitrification and warming solutions can improve the outcomes of the vitrified-thawed human im

关键词： vitrification human immature oocytes spindle chromosome temperature

High-temperature flow behavior modeling of 2099 alloy considering strain effects

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Transactions of Nonferrous Metals Society of China 2014年第3期24卷 798-805页

作者：张飞沈健闫晓东孙建林孙晓龙杨银刘勇北京有色金属研究总院北京100088 北京科技大学材料科学与工程学院北京100083 北京科技大学材料科学与工程学院北京100083 南方航空动力机械集团有限公司株洲412000

Isothermal compression tests in a wide range of temperatures （300-500 ℃） and strain rates （0.001-10 s^-1）, were performed on 2099 alloy to reveal the hot deformation characteristics. In order to give a precise prediction of flow behavior, the obtained experimental data were modified by friction and temperature correction and then employed to derive the constitutive modeling. The effects of the temperature and strain rate on hot deformation behavior can be expressed by Zener-Hollomon parameter including Arrhenius term. Furthermore, the influence of strain was incorporated in the constitutive analysis by considering the effect of strain on material constants （i.e. a, n, Q and A）. Consequently, the flow stress curves predicted by the developed modeling show a good agreement with the corrected ones, which indicates that the developed constitutive modeling could give an accurate and precise prediction for the flow stress of 2099 alloy.

关键词： 2099 alloy constitutive modeling compensation of strain flow stress

低温高磁感取向硅钢初次再结晶特征对二次再结晶完成的影响

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材料热处理学报 2017年第3期38卷 103-107页

作者：杨佳欣杨平许光郭小龙孙亮国家硅钢工程技术研究中心湖北武汉430080 北京科技大学材料科学与工程学院北京100083

低温板坯加热法生产高磁感取向硅钢,其磁感低于传统高温高磁感取向硅钢的磁感值。为探究其原因,作为该研究的第一步,测定并对比分析了两种工艺下初次再结晶的晶粒尺寸和织构。结果表明,低温高磁感取向硅钢完成初次再结晶后,晶粒尺寸长... 详细信息

低温板坯加热法生产高磁感取向硅钢,其磁感低于传统高温高磁感取向硅钢的磁感值。为探究其原因,作为该研究的第一步,测定并对比分析了两种工艺下初次再结晶的晶粒尺寸和织构。结果表明,低温高磁感取向硅钢完成初次再结晶后,晶粒尺寸长大且不均匀,织构组分不够单一,高斯晶核及有利织构{110}、{111}、{111}组分比例低于高温高磁感取向硅钢,其它不利织构组分含量更高,从而导致其二次再结晶后高斯织构发展不够完善,磁感值较低。

关键词：低温板坯加热高磁感取向硅钢

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

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Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： xiaodong Yang Haochen Shen xiaoming xiao Zhichao Li Qi Zhou Wei Yang Bin Jiang Yongli sun Luhong Zhang Zhenhua Yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting

苹果原花青素对小鼠运动能力和抗氧化能力的影响

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动物医学进展 2017年第6期38卷 57-60页

作者：陈晓龙孙阳杨新林广西工业职业技术学院基础教学部广西南宁530001 重庆医科大学体育工作部重庆400010 西北农林科技大学体育部陕西杨凌712100

为研究苹果中原花青素对小鼠运动能力和抗氧化能力的影响,选取5周龄健康雄性小鼠45只,随机分为3组,进行3周适应性游泳训练。小鼠运动结束后,通过轻度麻醉条件下采集血液和肌组织,检测血清中乳酸(LD)和丙二醛(MDA)含量,以及测定超氧化物... 详细信息

为研究苹果中原花青素对小鼠运动能力和抗氧化能力的影响,选取5周龄健康雄性小鼠45只,随机分为3组,进行3周适应性游泳训练。小鼠运动结束后,通过轻度麻醉条件下采集血液和肌组织,检测血清中乳酸(LD)和丙二醛(MDA)含量,以及测定超氧化物歧化酶(SOD)和过氧化氢酶(CAT)的活力。结果表明,各组小鼠的初始体重对比无显著差异(P>0.05);运动对照组和试验组小鼠的游泳至力竭的时间明显长于安静对照组;与运动对照组相比,试验组小鼠的游泳至力竭的时间也呈现明显的延长趋势(P<0.05)。游泳运动以后,运动对照组和试验组小鼠血清和肌组织中LD和MDA含量明显低于安静对照组;与运动对照组相比,试验组小鼠的血清LD和MDA含量也呈现明显下降趋势(P<0.05)。另外,运动对照组和试验组小鼠SOD和CAT活性明显高于安静对照组,且与运动对照组相比,试验组SOD和CAT活性显著升高(P<0.05)。说明苹果原花青素能提高小鼠运动能力和抗氧化能力,且与有氧运动相结合能够产生协同效应,具有较好的应用前景。

关键词：苹果原花青素运动能力抗氧化能力小鼠

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“胃不和”与“卧不安”的相关性调查研究

中国中医基础医学杂志 2017年第3期23卷 346-348页

作者：汤皓张茜张晓龙孙丽霞南京中医药大学南京210029

目的:探讨"胃不和"与"卧不安"的相关性,为临床脾胃病和失眠的治疗提供依据。方法:参考匹兹堡睡眠质量指数(PSQI)和睡眠状况自评量表(SRSS),收集失眠症相关信息,参考《中药新药临床研究指导原则》《中医内科学》等,收集脾胃病常见症状。... 详细信息

目的:探讨"胃不和"与"卧不安"的相关性,为临床脾胃病和失眠的治疗提供依据。方法:参考匹兹堡睡眠质量指数(PSQI)和睡眠状况自评量表(SRSS),收集失眠症相关信息,参考《中药新药临床研究指导原则》《中医内科学》等,收集脾胃病常见症状。设计调查问卷,在江苏省中医院普内科门诊收集患者,分级积分并整理信息录入数据库,运用SPSS 20.0软件进行相关性分析。结果:2组数据中脾胃病症状评分与失眠症状评分数值均呈正态分布;散点图显示脾胃病组和失眠组坐标点均较为密集;运用多元线性相关分析表明,2组脾胃症状与失眠症状存在正相关关系,回归方程有统计学意义。结论:"胃不和则卧不安",脾胃病与失眠症存在着密切的正相关性。

关键词：脾胃病失眠症相关性分析研究报告

An Unprecedented Efficiency with Approaching 21%Enabled by Additive‑Assisted Layer‑by‑Layer Processing in Organic Solar Cells

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Nano-Micro Letters 2025年第2期17卷 372-375页

作者： Shuai Xu Youdi Zhang Yanna sun Pei Cheng Zhaoyang Yao Ning Li long Ye Lijian Zuo Ke Gao Key Laboratory of Advanced Green Functional Materials College of ChemistryChangchun Normal UniversityChangchun 130032People’s Republic of China Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion School of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237People’s Republic of China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China State Key Laboratory and Institute of Elemento‑Organic Chemistry Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071People’s Republic of China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Tianjin Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300350People’s Republic of China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Recently published in Joule,Feng Liu and colleagues from Shanghai Jiaotong University reported a record-breaking 20.8%power conversion efficiency in organic solar cells(OSCs)with an interpenetrating fibril network active layer morphology,featuring a bulk p-in structure and proper vertical segregation achieved through additive-assisted layer-by-layer *** optimized hierarchical gradient fibrillar morphology and optical management synergistically facilitates exciton diffusion,reduces recombination losses,and enhances light capture *** approach not only offers a solution to achieving high-efficiency devices but also demonstrates the potential for commercial applications of OSCs.

关键词： Organic solar cells Additive-assisted layer-by-layer processing Three-dimensional fibril morphology Bulk p-i-n structure Optical management