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Mechanical and magnetic hysteresis as indicators of the origin and inception of fatigue damage in steel

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第8期11卷 580-586页

作者： Sheng BAO Wei-liang jin ming-feng huang Institute of Structural Engineering Zhejiang University Hangzhou 310058 China

N2 and N3 are known as the transition points of the three principal stages of fatigue: initial accommodation, accretion of damage and terminal fatigue. Many experiments show that the ratios of N2/Nf and N3/Nf tend to be stable even though the specific N2 and N3 values may fluctuate widely. The primary goal of this research is to study the piezomagnetic field surrounding AISI 1018 steel specimen under repeated loads and to find the ratio values of N2/Nf and N3/Nf by analyzing 11 sets of low-cycle fatigue data. An MTS-810 testing system with a peak capacity of 222 kN was used to obtain the data which consisted of stress, strain, and piezomagnetic field. A computer program was constructed to track the evolution of the piezomagnetic field and re- gression analysis was carried out to determine N2 and N3 values. It was observed that there exists a consistent relationship between N2 and Nf. The apparent invariance of the ratio N2/Nf implies that N2 may be identified as an index of performance in the early loading response of a specimen that forecasts its fatigue life, Nf. It has been demonstrated that measurements of the magnetic and mechanical hysteresis can yield significant insights into the various stages of the development of a fatigue critical microstructure which culminates in complete rupture of the material.

关键词： Piezomagnetic effects. Fatigue damage. Mechanical hvsteresis. Magnetic hysteresis

经尿道膀胱肿瘤切除术联合髂内动脉栓塞化疗治疗高龄高危浸润性膀胱癌的临床效果

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中国内镜杂志 2017年第3期23卷 99-103页

作者：黄金明南阳医学高等专科学校第一附属医院泌尿外科河南南阳473058

目的探讨经尿道膀胱肿瘤切除术(TURBt)联合髂内动脉栓塞化疗治疗因高龄高危不能耐受根治性膀胱全切的肌层浸润性膀胱癌的临床疗效。方法对2010年2月-2016年5月26例经B超、CT及膀胱镜检查确诊为肌层浸润性膀胱癌但不能耐受根治性膀胱全... 详细信息

目的探讨经尿道膀胱肿瘤切除术(TURBt)联合髂内动脉栓塞化疗治疗因高龄高危不能耐受根治性膀胱全切的肌层浸润性膀胱癌的临床疗效。方法对2010年2月-2016年5月26例经B超、CT及膀胱镜检查确诊为肌层浸润性膀胱癌但不能耐受根治性膀胱全切的高龄高危患者采用TURBt联合髂内动脉栓塞及灌注化疗进行治疗,TURBt可于灌注化疗前或灌注化疗后进行,具体视肿瘤大小及患者病情而定。结果 26例患者手术及髂内动脉栓塞化疗均顺利完成。术前栓塞化疗16例,术后栓塞化疗1次18例,2次9例,3次5例。术后7例复发者再次行TURBt,2例2次复发,行第3次TURBt,复发者再次术前栓塞化疗1次3例。6例合并前列腺增生(BPH)致排尿困难者同时行经尿道前列腺电切术(TURP)。未发生与手术相关的严重并发症,无围手术期死亡。术后病理报告均为肌层浸润性移行细胞癌。灌注化疗期间未发生骨髓抑制、贫血和肝肾功能损害等严重毒副作用。术后随访3个月~6年,2年内死亡2例,2~5年内死亡4例,18例生存至今,2例失访。结论对于肌层浸润性膀胱癌的高龄高危患者,TURBt联合髂内动脉栓塞化疗,具有微创、痛苦小、并发症少的特点,避免了根治性膀胱全切术带来的高风险性,以及由于尿流改道而造成的生活质量下降,有效延缓了病情的进展。方法安全、疗效可靠。

关键词：膀胱肿瘤高龄高危经尿道膀胱肿瘤切除术动脉栓塞灌注化疗

MicroRNA与HBV相关性肝癌发生发展关系的研究进展

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世界华人消化杂志 2008年第6期16卷 645-652页

作者：黄金明叶进陈立波华中科技大学协和医院湖北省武汉市430022

MicroRNA(miRNA)是一类内源性非编码的小RNA,广泛存在于动物、植物和病毒中.通过与目标mRNA互补配对,调控靶基因的表达或翻译,在生物体的发育、增殖、分化和凋亡等方面发挥重要的生理作用.最近研究表明miRNA与肿瘤发生存在密切关系.利... 详细信息

MicroRNA(miRNA)是一类内源性非编码的小RNA,广泛存在于动物、植物和病毒中.通过与目标mRNA互补配对,调控靶基因的表达或翻译,在生物体的发育、增殖、分化和凋亡等方面发挥重要的生理作用.最近研究表明miRNA与肿瘤发生存在密切关系.利用实验生物学及生物信息学方法对与肿瘤相关的miRNA进行研究是当前研究的热点.其中,在肝癌中目前已发现若干miRNA如miRNA-122、-21、-195、-18、-199等的异常表达与之有关.而在乙型肝炎病毒(HBV)感染相关疾病中的miRNA表达的研究尚不多见.本文就MicroRNA与肝癌发生发展之间的关系作一综述.

关键词：微小RNA 肝癌乙型肝炎病毒

Summary and clinical application of Zhuang medicine medicated thread moxibustion

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TMR Non-Drug Therapy 2023年第2期6卷 25-30页

作者： Yang-Meng Cao De-Yuan Qin Xiang-Yu Deng Dan-Dan Chen Zong-Xi Sun Cheng-Long Wang Zu-Jie Qin jin-ming huang Guangxi International Zhuang Medicine Hospital Afliliated to Guangxi University of Chinese Medicine Nanning 530201China Graduate School of Nanjing University of Chinese Medicine Nanjing 201029China

Zhuang medicine medicated thread moxibustion is a kind of external therapy with ethnic medicine characteristics that spreads in Guangxi Zhuang *** has a wide range of clinical application and significant curative effect,and can be used to treat diseases such as internal medicine,surgery,dermatology,gynecology,pediatrics,and five sense *** reviewing and combing the literature on the Zhuang medicine medicated thread moxibustion in recent years,this paper summarizes and prospects its clinical application,with a view to further explaining the basic principles and application rules of Zhuang medicine medicated thread moxibustion and digging its clinical value.

关键词： Zhuang medicine medicated thread moxibustion external therapy clinical research

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级联式天然气液化工艺能耗优化

石化技术与应用 2017年第6期35卷 442-446页

作者：金明皇昆仑能源湖北黄冈液化天然气有限公司生产技术部湖北黄冈438011

以脱酸、脱水、脱汞等净化处理后的天然气为原料,丙烷、乙烯和甲烷为制冷剂,采用级联式制冷工艺,利用HYSYS软件建立了天然气液化工艺流程模型。以单位能耗为流程优化的目标函数,各制冷循环的制冷剂压力、温度和循环量作为决策变量,并设... 详细信息

以脱酸、脱水、脱汞等净化处理后的天然气为原料,丙烷、乙烯和甲烷为制冷剂,采用级联式制冷工艺,利用HYSYS软件建立了天然气液化工艺流程模型。以单位能耗为流程优化的目标函数,各制冷循环的制冷剂压力、温度和循环量作为决策变量,并设定相关约束条件,对液化工艺能耗进行了优化。结果表明:在优化操作条件下,单位能耗为1 301 k J/m^3,压缩机总功耗为90.37 MW,二者分别低于优化前;随着天然气处理量的增加,压缩机功耗增加;当CH_4摩尔分数较高时,功耗相对较低;C_2H_6摩尔分数较高时,功耗相对也较高;N_2摩尔分数较高时,功耗变化不明显。

关键词：天然气液化级联式制冷工艺能耗分析 HYSYS模拟软件

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

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Nano Research 2025年第1期18卷 508-519页

作者： Ke Jiang Zhi Chen Ji Yu Chen Zheng Shan huang ming Wang Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China School of Mechanics Civil Engineering and ArchitecturesNorthwestern Polytechnical UniversityXi’an 710072China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China

Herein,the electromagnetic shielding performance of surface concave-convex(SC)and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional(3D)printing custom ***,surface stripe concaveconvex(SSC)and surface cylindrical concave-convex(SCC)micro-arrays with or without zig-zag micro-arrays are designed,and their shielding performance is simulated in multi-bands(C-,X-band).The multiwalled carbon nanotubes/polydimethylsiloxane composites(MWCNT/PDMS)with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer(ABS)molds which are printed by a 3D *** results show that the electromagnetic interference shielding effectiveness(EMI SE)of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays,and improving with the increase of conductivity and *** addition,the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

关键词： surface micro-arrays electrical properties electromagnetic interference(EMI)shielding three-dimensional(3D)printing

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： ming‑Yuan Yu jing Wu Guang Yin Fan‑Zhen Jiao Zhong‑Zhen Yu jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

法制建设、制度环境与出口贸易——基于中国制造业出口的实证分析

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河南科技大学学报（社会科学版） 2016年第6期34卷 70-79页

作者：汪明进黄娟绍兴区域经济研究中心浙江绍兴312000 南开大学经济学院天津300071

在中国劳动力快速老龄化,人口红利逐渐式微的情况下,如何保持贸易出口的平稳增长与结构转型是一个较为现实的问题。在贸易伙伴国(地区)制度环境异质性条件下,基于1992—2013年中国对172个国家(地区)的跨国面板数据,对不同的法制建设对... 详细信息

在中国劳动力快速老龄化,人口红利逐渐式微的情况下,如何保持贸易出口的平稳增长与结构转型是一个较为现实的问题。在贸易伙伴国(地区)制度环境异质性条件下,基于1992—2013年中国对172个国家(地区)的跨国面板数据,对不同的法制建设对中国制造业出口贸易行为进行实证检验发现,中国当前的法制建设对制造业出口贸易的影响呈"倒U型"特征,继续提升法制建设水平和制度环境质量,将有助于提升中国制造业的贸易出口水平。

关键词：法制建设制度环境中国制造业出口贸易

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鲤硒缺乏的病理学

水产学报 2009年第1期33卷 103-111页

作者：汪开毓彭成卓金明昌黄锦炉四川农业大学动物医学院

将健康幼鲤360尾设置3个相同平行处理,每个处理用鱼120尾,随机分为四组,分别投以0、0.15、0.30和0.45 mg/kg硒水平的饲料,各试验组的发病率和死亡率与日粮中硒含量高低呈负相关,其发病率分别为46.7%、33.3%、13.3%和0%,死亡率分别为26.7... 详细信息

将健康幼鲤360尾设置3个相同平行处理,每个处理用鱼120尾,随机分为四组,分别投以0、0.15、0.30和0.45 mg/kg硒水平的饲料,各试验组的发病率和死亡率与日粮中硒含量高低呈负相关,其发病率分别为46.7%、33.3%、13.3%和0%,死亡率分别为26.7%、16.7%、6.7%和0%。病鱼出现特征性的'瘦背症'和脊柱弯曲等症状。组织学上最突出的变化表现为营养性肌病、营养性肝病、胰腺的变性、坏死等多器官组织的退行性变化。超微结构上,骨骼肌纤维、肝细胞和肾小管上皮细胞线粒体肿胀,嵴断裂,甚至发生溶解,整个线粒体呈囊泡状。硒缺乏幼鲤血液中谷草转氨酶(AST)、谷丙转氨酶(ALT)活性升高,谷胱甘肽过氧化物酶(GSH-Px)、过氧化物歧化酶(SOD)活性降低,丙二醛(MDA)含量升高。

关键词：鲤硒缺乏病理学