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变压器油前处理自动化装置设计

机床与液压 2024年第15期52卷 143-150页

作者：吴培伟魏晓东宋浩永赵崇智刘静广东电网有限责任公司广州供电局广东广州510410

针对变压器油前处理操作复杂、效率低下的问题,模块化设计一套变压器油前处理自动化装置。该装置控油模块的开瓶机构实现瓶装油样到液路系统的转移,注油注气套胶帽机构实现瓶装油样到针筒油样的自动化转移,脱气进样模块的多工位振荡托... 详细信息

针对变压器油前处理操作复杂、效率低下的问题,模块化设计一套变压器油前处理自动化装置。该装置控油模块的开瓶机构实现瓶装油样到液路系统的转移,注油注气套胶帽机构实现瓶装油样到针筒油样的自动化转移,脱气进样模块的多工位振荡托盘实现多个针筒油样升温振荡后将脱出的样气通过定量管注入色谱仪进行组分分析。对油样转移的准确性、重复性及脱气量的精准性进行了实验,实验结果表明:该装置能够精准地将机械振荡脱出的气体转移到小针筒内,小针筒上方的激光传感器计算出的脱气量能精确到0.000 1 mL,实现了自动化的变压器油前处理。

关键词：变压器油前处理自动化装置模块化设计

Fe含量对Cu-Ti-Ni-xFe合金组织与性能的影响

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金属热处理 2024年第1期49卷 96-102页

作者：靖青秀彭勇肖翔鹏韦丹丹杨雪晴黄晓东江西理工大学材料冶金化学学部江西赣州341000

采用Pandat软件绘制了Cu-2.5Ti-2Ni-xFe四元合金相图,对Fe元素在合金中的存在形式进行了预测。然后通过真空熔炼制备了4种不同Fe含量的Cu-2.5Ti-2Ni-xFe(x=0, 0.4, 0.8, 1.5)合金,再经退火、热轧、固溶、冷轧和时效处理工艺,探究了Fe含... 详细信息

采用Pandat软件绘制了Cu-2.5Ti-2Ni-xFe四元合金相图,对Fe元素在合金中的存在形式进行了预测。然后通过真空熔炼制备了4种不同Fe含量的Cu-2.5Ti-2Ni-xFe(x=0, 0.4, 0.8, 1.5)合金,再经退火、热轧、固溶、冷轧和时效处理工艺,探究了Fe含量对铸态及时效态Cu-Ti-Ni-xFe合金组织与性能的影响。结果表明,Fe元素在Cu-2.5Ti-2Ni-xFe合金中以FeTi相、Fe2Ti相的形式存在,Fe的添加会导致铸态组织中产生粗大的第二相,使合金的硬度降低。但是经时效处理后,添加Fe元素的合金硬度和导电率获得明显提升,抗高温软化性能也更优,其中以Cu-2.5Ti-2Ni-0.8Fe合金的性能最佳,其硬度和导电率分别为274.26 HV和17.6%IACS,软化温度达到526℃。

关键词： Cu-Ti-Ni-Fe合金显微组织物理性能抗软化性能 Fe含量

Radiobiological response of human hepatoma and normal liver cells exposed to carbon ions generated by Heavy Ion Research Facility in Lanzhou

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Science China(Physics,Mechanics & Astronomy) 2006年第1期49卷 72-76页

作者： YANG Jianshe1,2, LI Wenjian1, JIN xiaodong1, jing Xigang1, GUO Chuanling1, WEI Wei1 & GAO Qingxiang3 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2. Life Science School of North West Normal University, Lanzhou 730070, China 3. Life Science School of Lanzhou University, Lanzhou 730000, China Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Life Science School of North West Normal University Lanzhou China Life Science School of Lanzhou University Lanzhou China

Human hepatoma and normal liver cells were irradiated with 12C6+ ion beams (LET = 96.05 keV/μm) and γ-rays at Heavy Ion Research Facility in Lanzhou (HIRFL). The chromatid breaks and break types were detected using the premature chromosome con- densation technique. Our experimental results showed that chromatid breaks seem to have a good relation with 12C6+ absorbed dose and 12C6+ are more effective to induce chromatid breaks as compared to the γ-rays. For 12C6+ ion irradiation the major break was isochromatid break, while chromatid breaks were dominant for γ-ray irradiation. We also observed that the Relative Biology Effectiveness (RBE) of 12C6+ ion is about 2.5 times higher than that of γ-rays.

关键词： biological response, tumor cell, normal cell, heavy ion HIRFL.

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中细粒全尾砂静动态絮凝沉降规律试验研究

矿业研究与开发 2023年第5期43卷 13-18页

作者：杨纪光李强吴再海郭加仁盛宇航李广波荆晓东王玉亮山东黄金矿业科技有限公司山东济南250100 北京科技大学土木与资源工程学院北京100083

为探究给料速度、泥层沉降速率、底流质量浓度和屈服应力等多因素耦合条件下中细粒全尾砂絮凝沉降规律,在静态絮凝沉降试验的基础上,利用自主研发的连续浓密测试系统模拟立式砂仓内尾砂的动态絮凝沉降过程。研究结果表明,不同砂浆质量... 详细信息

为探究给料速度、泥层沉降速率、底流质量浓度和屈服应力等多因素耦合条件下中细粒全尾砂絮凝沉降规律,在静态絮凝沉降试验的基础上,利用自主研发的连续浓密测试系统模拟立式砂仓内尾砂的动态絮凝沉降过程。研究结果表明,不同砂浆质量、不同絮凝剂添加量条件下,静态絮凝沉降曲线均呈现出先快速下降后基本趋于水平的形态;在给料速度为0.6 t/(m^(2)·h)时,动态絮凝沉降的底流质量浓度最高;底流质量浓度与底流屈服应力呈正相关关系,与泥层沉降速率呈负相关关系,并随着给料速度的增加而增大;絮团通过紊流区后呈现先加速沉降后稳定沉降的规律。研究结果指导了某矿实现了立式砂仓絮凝浓密中细粒全尾砂的工业应用。

关键词：中细粒全尾砂静态絮凝沉降动态絮凝沉降底流质量浓度

Pre-exposure of mouse pituitary with low-dose 60Co γ-ray may alleviate diminishing male reproductive endocrine capacity induced by subsequent high-dose irradiation

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Pre-exposure of mouse pituitary with low-dose 60Co γ-ray ma...

Effects of pre-exposure mouse pituitary with low-dose 60Co γ-ray on growth hormone(GH) and body mass induced by subsequent high-dose irradiation

第十二届全国核物理大会暨第七届会员代表大会

作者： Zhang Hong, Li Wenjian, jing xiaodong, Liu Bing, Min Fengling, Zhou Qingming, Xie Yi(Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000)

To investigate the effects of pre-exposure of mouse pituitary with low-dose Co T-ray on male reproductive endocrine capacity induced by subsequent high-dose irradiation, the pituitary of the B6C3F hybrid strain male mice were irradiated with 0.05 Gy of Co γ-ray as the pre-exposure dose (D), and were then irradiated with 2 Gy of Co γ-ray as challenging irradiation dose (D) at 4 h after per-exposure. Pituitary gonadotroping hormones-follicle-stimulating hormone (FSH) and luterinzing hormone (LH), serum testosterone, testis weight, sperm count and sperm morphology were measured at 35th day after irradiation. The results showed that there were a significant reduction in the levels of serum FSH, LH, testosterone, testis weight and sperm count, and a significant enhancement in the percentage of spermshape abnormalities by irradiation of mouse pituitary with 2 Gy of Co γ-ray. Pre-exposure with a low-dose (0.05 Gy) of Co γ-ray significantly alleviated the harmful effects induced by subsequent a high-dose (2 Gy) irradiation. The increase of SOD activity and the decrease of lipid peroxidation levels induced by low-dose irradiation may be involved in this radioresistance.

关键词： 60Co γ-ray low-dose pre-exposure male reproductive endocrine capacity mouse pituitary and testis adaptive response

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Effects of pre-exposure mouse pituitary with low-dose 60Co ...

Research advances of magnesium and magnesium alloys worldwide in 2022

第十二届全国核物理大会暨第七届会员代表大会

作者： Zhang Hong, Li Wenjian, jing xiaodong, Liu Bing, Min Fengling, Zhou Qingming, Xie Yi(Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000)

The pituitary of the B6C3F hybrid strain mice were irradiated with 0.05 Gy of Co y-ray as the pre-exposure dose (D), and were then irradiated with 2 Gy of Co γ-ray as challenging irradiation dose (D) at 4 h after per-exposure. Body weight and serum growth hormone (GH) were measured at 35th day after irradiation. The results showed that irradiation of mouse testes with 2 Gy of Coy-ray significantly diminished mouse body weight and level of serum GH. Pre-exposure with a low-dose (0.05 Gy) of Coy-ray significantly alleviated reductions of mouse body weight and level of serum GH induced by subsequent a high-dose (2 Gy) irradiation. The data suggested that low-dose ionizing irradiation can induce adaptive responses to the harmful effects of pituitary by subsequent high-dose exposure.

关键词： 60Co γ-ray low-dose pre-exposure mouse pituitary growth hormone (GH) adaptive response

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Journal of Magnesium and Alloys 2023年第8期11卷 2611-2654页

作者： Yan Yang Xiaoming Xiong jing Chen xiaodong Peng Daolun Chen Fusheng Pan National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China Department of Mechanical and Industrial Engineering Toronto Metropolitan University(formerly Ryerson University)TorontoON M5B 2K3Canada

More than 4600 papers in the field of Mg and Mg alloys were published and indexed in the Web of Science(WoS)Core Collection database in *** bibliometric analyses indicate that the microstructure,mechanical properties,and corrosion of Mg alloys are still the main research ***-Mg materials,Mg ion batteries and hydrogen storage Mg materials have attracted much *** contributions to the research and development of magnesium alloys were made by Chongqing University(>200 papers),Chinese Academy of Sciences,Shanghai Jiao Tong University,and Northeastern University(>100 papers)in China,Helmholtz Zentrum Hereon in Germany,Ohio State University in the USA,the University of Queensland in Australia,Kumanto University in Japan,and Seoul National University in Korea,University of Tehran in Iran,and National University of Singapore in Singapore,*** review is aimed to summarize the progress in the development of structural and functional Mg and Mg alloys in *** on the issues and challenges identified here,some future research directions are suggested.

关键词： Magnesium alloys Cast magnesium alloys Wrought magnesium alloys Bio-magnesium alloys Mg-based energy storage materials Processing technologies Corrosion and protection

Effect of CuO species and oxygen vacancies over CuO/CeO_(2)catalysts on low-temperature oxidation of ethyl acetate

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Journal of Rare Earths 2023年第6期41卷 862-869,I0003页

作者： Yuchuan Ye Liangjun Gao jing Xu Luhui Wang Liuye Mo xiaodong Zhang National Engineering Research Center for Marine Aquaculture Zhejiang Ocean UniversityZhoushan 316022China School of Petrochemical Engineering&Environment Zhejiang Ocean UniversityZhoushan 316022China School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai 200093China

The catalytic oxidation of ethyl acetate(EA)was studied over CuO/CeO_(2) catalysts which were prepared by ball milling with different precursors(copper oxide,cerium acetate,cerium dioxide,copper acetate and cerium hydroxide).The CuO/CeO_(2) catalyst(O-A)prepared with copper oxide and cerium acetate as precursors shows very high catalytic activity that 100%EA conversion is achieved at low temperature of 220℃.It is found that specific surface area(112.8 m^(2)/g),particle size of CuO(3.5 nm)and proportion of oxygen vacancies are prominent on the O-A *** vacancies in CeO_(2)support are beneficial to enhancing the adsorption and activation of the *** finely dispersed CuO particles and oxygen vacancies which are derived from the synergistic interaction of Cu-Ce species play an important role in the catalytic oxidation of EA.

关键词： Ethyl acetate oxidation Low temperature CuO/CeO_(2) CueOeCe Oxygen vacancy Rare earths

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UKA假体后倾角安装位置对衬垫磨损的影响

医用生物力学 2024年第2期39卷 236-242页

作者：党晓栋熊守林屈亚飞任佳轩张静张净宇乔锋陈瑱贤长安大学工程机械学院西安710064 天津医院骨与软组织肿瘤科天津300211 西安交通大学医学院附属红会医院中西医结合骨科西安710054

目的研究单髁膝关节置换(unicompartmental knee arthroplasty,UKA)假体不同后倾角度安装对膝关节承载、运动及衬垫磨损的影响。方法联合UKA骨肌多体动力学模型、有限元模型和磨损模型,分析固定式UKA假体5种后倾角安装位置情况对术后膝... 详细信息

目的研究单髁膝关节置换(unicompartmental knee arthroplasty,UKA)假体不同后倾角度安装对膝关节承载、运动及衬垫磨损的影响。方法联合UKA骨肌多体动力学模型、有限元模型和磨损模型,分析固定式UKA假体5种后倾角安装位置情况对术后膝关节力和运动、衬垫接触应力、线性磨损深度和体积磨损量的影响。结果后倾角0°时,衬垫的最大von Mises等效应力为24.84 MPa,接触应力为47.61 MPa,5百万次循环(million cycle,MC)周期的磨损量为47.29 mm3。随着UKA胫骨假体后倾角的增加,步态周期内旋和后移运动均增大,摆动相的内侧关节力增大,5 MC磨损周期后衬垫von Mises等效应力与接触应力显著减小,衬垫的磨损面积、最大线性磨损深度和体积磨损量随之减少。相对于后倾角0°,后倾角为3°、5°、7°时衬垫的线性磨损深度分别减小了17.8%、19.2%、20.6%;衬垫体积磨损量分别下降了24.5%、30.9%、34.3%。结论UKA假体考虑后倾角安装超过3°时会显著增加步态周期内旋运动和后移运动,减小聚乙烯衬垫关节面的磨损。

关键词：单髁膝关节置换术后倾角骨肌多体动力学接触力学磨损预测