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TiO_(2)@C catalyzed hydrogen storage performance of Mg-Ni-Y alloy with LPSO and ternary eutectic structure

Journal of Magnesium and Alloys 2024年第2期12卷 767-778页

作者： Wenjie Song Wenhao Ma Shuai He Wei Chen Jianghua Shen Dalin Sun qiuming Wei Xuebin yu College of Mechanical and Electrical Engineering Shaanxi University of Science and TechnologyXi’anShaanxi 710021China Department of Materials Science Fudan UniversityShanghai 200438China School of Aeronautics Northwestern Polytechnical UniversityXi’anShaanxi 710072China Department of Mechanical Engineering&Engineering Science the University of North Carolina at CharlotteCharlotteNorth Carolina 28223United States of America

A designed Mg_(88.7)Ni_(6.3)Y_(5)hydrogen storage alloy containing 14H type LPSO(long-period stacking ordered)and ternary eutectic structure was prepared by regulating the alloy composition and casting.The hydrogen storage performance of the alloy was improved by adding nano-flower-like TiO_(2)@C catalyst.The decomposition of the LPSO structure during hydrogenation led to the formation of plenty of nanocrystals which provided abundant interphase boundaries and activation sites.The nanoscale TiO_(2)@C catalyst was uniformly dispersed on the surface of alloy particles,and the"hydrogen overflow''effect of TiO_(2)@C accelerated the dissociation and diffusion of hydrogen on the surface of the alloy particles.As a result,the in-situ endogenous nanocrystals of the LPSO structure decomposition and the externally added flower-like TiO_(2)@C catalyst uniformly dispersed on the surface of the nanoparticles played a synergistic catalytic role in improving the hydrogen storage performance of the Mg-based alloy.With the addition of the TiO_(2)@C catalyst,the beginning hydrogen desorption temperature was reduced to 200℃.Furthermore,the saturated hydrogen absorption capacity of the sample was 5.32 wt.%,and it reached 4.25 wt.%H_(2) in 1 min at 200℃and 30 bar.

关键词： Hydrogen storage Mg LPSO TiO_(2)@C Synergistic catalysis

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Study on the viscoelastic behavior of SEEPS block copolymer based on a modified BSW model

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Chinese Science Bulletin 2005年第19期50卷 2171-2175页

作者： WANG Wanjie ZHENG Qiang yu qiuming Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of Fluid Power Control and Transmission Zhejiang University Hangzhou 310027 China

Studies on the viscoelastic behavior of styrene- [ethylene-(ethylene-propylene)]-styrene block copolymer (SEEPS) were carried out, and some characteristic viscoelas-tic parameters were calculated. The longest relaxation time τmax was obtained through simulating the relaxation spec-trum on the basis of a modified Baumgaertel-Schausberger- Winter (mBSW) model. The results revealed that there exists a “second plateau” in the low frequency region of the master curves. The reason for this phenomenon is attributed to the entanglement of macromolecular chains. It is suggested that the hard blocks, polystyrene, act as entanglement points, resulting in a topology restraint to the movement of macro-molecular chains. Meanwhile, it is found that the horizontal shift factors (aT) vs temperature in the master curve could be fitted to the Williams-Landel-Ferry (WLF) equation and Ar-rhenius equation respectively and the flow activation energy (Ea) is 127.88 kJ/mol. In addition, the plateau modulus (GN0) and entanglement molecule weight (Me) were calculated.

关键词：苯乙烯共聚物时间温度重合法则黏弹性参数时间光谱频率曲线

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改良脐部切口单孔腹腔镜胆总管囊肿根治术的安全性与有效性初探:一项回顾性队列研究

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临床小儿外科杂志 2024年第1期23卷 10-15页

作者：王哲余家康何秋明钟微广州市妇女儿童医疗中心新生儿外科广州510623

目的初步探讨改良脐部切口单孔腹腔镜胆总管囊肿切除、肝总管空肠Roux-en-Y吻合术(single-port laparoscopic choledochal cyst excision and Roux-en-y hepaticojejunostomy,SPCH)治疗胆总管囊肿的安全性及有效性。方法本研究为回顾性队列研究,纳入2018年1月1日至2022年12月31日广州市妇女儿童医疗中心收治并最终行手术治疗的62例胆总管囊肿患儿作为研究对象,患儿均经磁共振胰胆管成像(magnetic resonance cholangiopancreatography,MRCP)确诊并接受SPCH(为SPCN组,n=43)和多孔腹腔镜胆总管囊肿切除、肝总管空肠Roux-en-Y吻合术(multiple-port laparoscopic choledochal cyst excision and Roux-En-Y hepaticojejunostomy,MPCH,为MPCH组,n=19)治疗,通过病历系统采集相关数据(住院时间、手术时间、术后并发症等),对患儿基线临床特征、短期疗效进行比较。结果MPCH组和SPCH组患儿基线数据(性别、手术月龄、Todani分型、临床表现、产前诊断情况及囊肿最长径)差异无统计学意义(P>0.05),具备可比性。SPCH组平均术后住院时间较MPCH组短,差异无统计学意义[(7.14±2.70)d比(7.58±3.27)d,P=0.892];手术时间[(266.79±69.39)min比(277.32±90.23)min,P=0.913]和出血量[(8.88±12.37)mL比(16.68±34.84)mL,P=0.758]差异亦无统计学意义。MPCH组放置引流管的数量明显多于SPCH组(11/19比7/43,P<0.001)。两组除SPCH组有1例出现肝肠吻合部狭窄以外,其余患儿随访期间未见手术相关并发症,SPCH组与MPCH组并发症发生率(2.33%比0.00%)差异无统计学意义(P=0.500)。结论改良SPCH手术的安全性及有效性与MPCH相当,但前者有助于降低单孔腹腔镜手术的操作难度。

关键词：胆总管囊肿先天性胆管扩张症微创手术快速康复外科外科手术儿童

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基于ABAQUS的气动潜孔锤球齿碎岩及布齿优化

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钻探工程 2024年第1期51卷 40-50页

作者：杨秋明周兢王瑜夏柏如吴浩中国地质大学(北京) 北京100083 自然资源部深部地质钻探技术重点实验室北京100083 中煤地第二勘探局集团有限责任公司河北涿州072750 中国煤炭地质总局北京100038

为提高坚硬地层大直径潜孔锤的破岩效率与使用寿命,运用ABAQUS软件建立了球齿碎岩仿真模型,对比分析?18 mm球齿在不同钻进参数下冲击切削碎岩过程中的破碎比功、侵入深度、破碎范围与应力影响范围等曲线,优选钻进参数和布齿。分析结果表... 详细信息

为提高坚硬地层大直径潜孔锤的破岩效率与使用寿命,运用ABAQUS软件建立了球齿碎岩仿真模型,对比分析?18 mm球齿在不同钻进参数下冲击切削碎岩过程中的破碎比功、侵入深度、破碎范围与应力影响范围等曲线,优选钻进参数和布齿。分析结果表明:当钻压为1.2 kN、冲击功为30 J时,对岩石的破碎效率较高,球齿入岩的位移可达0.67 mm,并对岩石进行应力界限划分,得出应力影响范围为43.4 mm;通过双齿冲击切削模拟确定了较为优秀的圈距与间距:圈距取47.4 mm,间距取43.4~51.4 mm;考虑到球齿的磨损,利用圈距与间距对?711 mm大直径潜孔锤进行了优化布齿。

关键词：气动潜孔锤球齿钻进参数布齿应力影响范围坚硬地层岩石破碎 ABAQUS

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中国鸽毛滴虫病的流行规律及中西医防治措施

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中国动物传染病学报 2024年第2期32卷 229-236页

作者：梁冰冰尉啸涵李复煌李秋明刘晓晔董虹北京农学院兽医学(中医药)北京市重点实验室北京102206 北京市畜牧兽医总站北京100029 北京大学北京100871

鸽子是中国四大家禽产品之一,家鸽、肉鸽和观赏鸽等鸽养殖行业在中国各地区繁育广泛,然而由鸽源禽毛滴虫引起的一种导致鸽子消瘦、腹泻、生长发育迟缓等症状的寄生性单细胞原虫病的鸽毛滴虫病,阻碍兽医临床鸽养殖业的发展,带来的巨大经... 详细信息

鸽子是中国四大家禽产品之一,家鸽、肉鸽和观赏鸽等鸽养殖行业在中国各地区繁育广泛,然而由鸽源禽毛滴虫引起的一种导致鸽子消瘦、腹泻、生长发育迟缓等症状的寄生性单细胞原虫病的鸽毛滴虫病,阻碍兽医临床鸽养殖业的发展,带来的巨大经济损失。本文就中国鸽毛滴虫病的流行病学规律、毛滴虫检测方法进行综述,并总结归纳中西医防治毛滴虫病的策略,为防治临床鸽毛滴虫病相关疾病提供参考。

关键词：鸽毛滴虫流行规律中西医防治方案

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Catalytic effect of MOF-derived transition metal catalyst FeCoS@C on hydrogen storage of magnesium

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Journal of Materials Science & Technology 2023年第7期138卷 59-69页

作者： Yaokun Fu Lu Zhang yuan Li Sanyang Guo Zhichao yu Wenfeng Wang Kailiang Ren qiuming Peng Shumin Han State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China

The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH_(2),therefore,in this paper,we synthesize a carbon-supported transition metal compound,FeCoS@C derivative from ZIF-67,by utilizing the in situ formed C dispersive multiphase Mg_(2)Co,α-Fe,Co_(3)Fe_(7),and MgS to implement catalysis to MgH_(2).Noteworthily,MgH_(2)-FeCoS@C rapidly ab-sorbs 6.78 wt%H_(2)within 60 s at 573 K and can also absorb 4.56 wt%H_(2)in 900 s at 473 K.Besides,the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH_(2)from 620 to 550 K.The dehydrogenation activation energy of MgH_(2)decreases from 160.7 to 91.9 kJ mol^(-1).Studies show that the Mg_(2)Co,α-Fe,and Co_(3)Fe_(7)act as“hydrogen channels”to accelerate hydrogen transfer due to the presence of transition metals,and MgS with excellent catalytic effect formed from MgH_(2)-FeCoS@C provides a strong and stable catalytic effect.Besides,the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system,but also provides more active sites for the catalysts.Our study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH_(2).

关键词： Hydrogen storage material Magnesium hydride Heterogeneous catalyst Synergistic catalytic MOF materials

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海底管道法兰水下对接方法

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化工装备技术 2024年第3期45卷 58-61页

作者：袁朝纲于银海吕伟俊郑秋明代双江海洋石油工程股份有限公司天津市300462

海底管道法兰对接是当今海底管道安装过程中不可或缺的一部分,提升水下法兰对接的效率对降低海底管道工程的整体成本具有重要意义。针对不同海域和环境条件下的海底管道法兰对接方法进行了研究,介绍了钢质管道采用工程船吊机辅助海底管... 详细信息

海底管道法兰对接是当今海底管道安装过程中不可或缺的一部分,提升水下法兰对接的效率对降低海底管道工程的整体成本具有重要意义。针对不同海域和环境条件下的海底管道法兰对接方法进行了研究,介绍了钢质管道采用工程船吊机辅助海底管道法兰对接、配重块和门架辅助海底管道法兰对接和法兰拉紧器用于法兰对接的方法,以及使用倒链与浮袋辅助柔性软管法兰对接和水平吊杆配合柔性软管法兰对接的方法。并研究了海底管道法兰对接方法的适用性,提出了选取原则,可为海底管道法兰对接工程提供参考。

关键词：海底管道法兰对接方法柔性软管配重块拉紧器

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Time of flight improved thermally grown oxide thickness measurement with terahertz spectroscopy

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Frontiers of Mechanical Engineering 2022年第4期17卷 205-215页

作者： Zhenghao ZHANG Yi HUANG Shuncong ZHONG Tingling LIN yujie ZHONG qiuming ZENG Walter NSENGIyuMVA Yingjie yu Zhike PENG Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing School of Mechanical Engineering and AutomationFuzhou UniversityFuzhou 350108China Institute of Precision Instrument and Intelligent Measurement&Control Fuzhou UniversityFuzhou 350108China School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200072China School of Mechanical Engineering Ningxia UniversityYinchuan 750000China

As a nondestructive testing technique,terahertz time-domain spectroscopy technology is commonly used to measure the thickness of ceramic coat in thermal barrier coatings(TBCs).However,the invisibility of ceramic/thermally grown oxide(TGO)reflective wave leads to the measurement failure of natural growth TGO whose thickness is below 10μm in TBCs.To detect and monitor TGO in the emergence stage,a time of flight(TOF)improved TGO thickness measurement method is proposed.A simulative investigation on propagation characteristics of terahertz shows the linear relationship between TGO thickness and phase shift of feature wave.The accurate TOF increment could be acquired from wavelet soft threshold and cross-correlation function with negative effect reduction of environmental noise and system oscillation.Thus,the TGO thickness could be obtained efficiently from the TOF increment of the monitor area with different heating times.The averaged error of 1.61μm in experimental results demonstrates the highly accurate and robust measurement of the proposed method,making it attractive for condition monitoring and life prediction of TBCs.

关键词： thermal barrier coatings thermally grown oxide terahertz spectroscopy time of flight

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Correction to:Comprehensive Management of Daily Living Activities,behavioral and Psychological Symptoms,and Cognitive Function in Patients with Alzheimer’s Disease:A Chinese Consensus on the Comprehensive Management of Alzheimer’s Disease

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Neuroscience Bulletin 2022年第3期38卷 337-338页

作者： Jianjun Jia Jun Xu Jun Liu Yongjun Wang Yanjiang Wang yunpeng Cao Qihao Guo qiuming Qu Cuibai Wei Wenshi Wei Junjian Zhang Enyan yu Department of Neurology The Second Medical CenterPeople’s Liberation Army General HospitalBeijing100853China Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijing100050China Department of Neurology Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou510120China Cognitive Impairment Department Shenzhen Kangning HospitalShenzhen518118China Department of Neurology Daping HospitalArmy Medical UniversityChongqing400042China Department of Neurology The First Hospital of China Medical UniversityShenyang210112China Department of Gerontology Shanghai Jiaotong University Affiliated Sixth People’s HospitalShanghai200233China Department of Neurology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an710061China Department of Neurology Xuanwu Hospital Capital Medical UniversityBeijing100053China Department of Neurology Huadong Hospital Affiliated to Fudan UniversityShanghai200040China Department of Neurology Zhongnan Hospital of Wuhan UniversityWuhan430071China Department of Psychology Chinese Academy of Sciences Cancer Hospital of the University of the Chinese Academy of SciencesHangzhou310022China

The article‘Comprehensive Management of Daily Living Activities,behavioral and Psychological Symptoms,and Cognitive Function in Patients with Alzheimer’s Disease:A Chinese Consensus on the Comprehensive Management of Alzheimer’s Disease’,written by Jun Xu,Jun Liu,Yongjun Wang,Yanjiang Wang,yunpeng Cao,Qihao Guo,qiuming Qu,Cuibai Wei,Wenshi Wei,Junjian Zhang&Enyan yu,was originally published electronically on the publisher’s internet portal on 29th May 2021 without open access.With the author(s)’decision to opt for Open Choice the copyright of the article changed on 11th June 2021 to©The Author(s)2021 and the article is forthwith distributed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons licence,and indicate if changes were made.The original article has been corrected.

关键词： Alzheimer Patients Activities

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B7-H3:Another Molecule Marker for Mo-DCs?

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Cellular & Molecular Immunology 2005年第4期2卷 307-311页

作者： Guangbo Zhang qiuming Dong Ying Xu Gehua yu Xueguang Zhang Clinical Immunology Laboratory of Jiangsu Province Suzhou University No.1 Affiliated Hospital 96 Shizi Street Suzhou 215006 China Biotechnology Institute Suzhou University 48 Renmin Road Suzhou 215007 China

Using a newly generated monoclonal antibody （2E6） against human B7-H3, we explored the expression of the molecule on dendritic cells derived from monocytes （Mo-DCs）. Its expression was examined by means of immunostaining and flow cytometric （FCM） analysis. The results showed that B7-H3 was expressed in the course of Mo-DC maturation induced with interleukin 4 （IL-4） and granulocyte/macrophage colony-stimulating factor （GM-CSF）. The expression could be detected at all the stages of Mo-DC differentiation, and remained at a quite stable level. Interestingly, B7-H3 was not expressed by T cells and B cells, even these cells were activated respectively by PHA or PWM. A weak expression could be detected on resting monocytes. These data showed that constitutive expression of B7-H3 at a high level was found on imDCs and mDCs derived from monocytes. Due to no expression on T cells and B cells, we speculate that B7-H3 might be another valuable molecule marker for Mo-DCs.

关键词： B7-H3 costimulatory molecule Mo-DC monoclonal antibody

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