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materials Futures 2022年第1期1卷 9-31页

作者： j Y Zhang Z Q Zhou Z B Zhang M H Park Q Yu Z Li j ma A D Wang H G Huang M Song B S Guo Q Wang Y Yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China Shenzhen Key Laboratory of High Performance Nontraditional manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhenGuangdong 518060People’s Republic of China School of materials Science and Engineering Dongguan University of TechnologyDongguanGuangdong 523808People’s Republic of China Institute of materials China Academy of Engineering PhysicsJiangyouSichuan 621907People’s Republic of China State Key Laboratory of Powder Metallurgy Central South UniversityChangshaHunan 410083People’s Republic of China Institute of Advanced Wear&Corrosion Resistant and Functional materials Jinan UniversityGuangzhouGuangdong 510632People’s Republic of China Institute of materials Laboratory for MicrostructuresShanghai UniversityShanghai 200444People’s Republic of China Department of materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China Department of Advanced Design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China

Metallic glasses(MGs)or amorphous alloys are an important engineering material that has a history of research of about 80–90 *** different fast cooling methods were developed for multi-component MGs between 1960s and 1980s,1990s witnessed a surge of research interest in the development of bulk metallic glasses(BGMs).Since then,one central theme of research in the metallic-glass community has been compositional design that aims to search for MGs with a better glass forming ability,a larger size and/or more interesting properties,which can hence meet the demands from more important *** this review article,we focus on the recent development of chemically complex MGs,such as high entropy MGs,with new tools that were not available or mature yet until recently,such as the state-of-the-art additive manufacturing technologies,high throughput materials design techniques and the methods for big data analyses(*** learning and artificial intelligence).We also discuss the recent use of MGs in a variety of novel and important applications,from personal healthcare,electric energy transfer to nuclear energy that plays a pivotal role in the battle against global warming.

关键词： metallic glasses amorphous alloys alloy design additive manufacturing machine learning high throughput materials design

Dynamic Pressure Induced by a Methane-Air Explosion in Tunnel

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Dynamic Pressure Induced by a Methane-Air Explosion in Tunne...

Enhanced properties of stone coal-based composite phase change materials for thermal energy storage

第六届全国强动载效应及防护学术会议暨2014年复杂介质/结构的动态力学行为创新研究群体学术研讨会

作者： Q.Zhang Q.j.ma State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

The hazardous effect of dynamic pressure and strong gas flows induced by a methane-air mixture explosion in underground coal mines is *** dynamic pressure effect of a methane-air explosion was analyzed by numerical simulation,in a duct and *** with overpressure that can act on a body and make it out of shape,dynamic pressure caused by the high-speed flow of the explosion gas products,like a strong hurricane,is able to topple over anything it comes *** destruction caused by dynamic pressure induced by a methane-air explosion is more serious than the overpressure at the structural *** a tube or tunnel partially filled by a methane-air mixture,the dynamic pressure is lower than the overpressure in the region occupied by the flammable *** the premixed region,the dynamic pressure is of the same order of magnitude as the *** damage cannot be caused by the overpressure,the drag forces induced by high flow velocities in an explosion are sometimes strong enough to cause damage,especially at a structural opening of an underground coal mine.

关键词： Dynamic pressure Explosion Methane-air mixture Numerical simulation

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International journal of Minerals,Metallurgy and materials 2024年第1期31卷 206-215页

作者： Baoshan Xie Huan ma Chuanchang Li jian Chen Key Laboratory of Renewable Energy Electric-Technology of Hunan Province School of Energy and Power EngineeringChangsha University of Science and TechnologyChangsha 410114China State Key Laboratory of Disaster Prevention and Reduction for Power Grid Changsha University of Science and TechnologyChangsha 410114China

Phase change materials (PCMs) can be incorporated with low-cost minerals to synthesize composites for thermal energy storage in building *** coal (SC) after vanadium extraction treatment shows potential for secondary utilization in composite *** prepared SC-based composite PCMs with SC as a matrix,stearic acid (SA) as a PCM,and expanded graphite (EG) as an *** combined roasting and acid leaching treatment of raw SC was conducted to understand the effect of vanadium extraction on promoting loading *** showed that the combined treatment of roasting at 900℃ and leaching increased the SC loading of the composite by 6.2%by improving the specific surface *** loading capacity and thermal conductivity of the composite obviously increased by 127%and 48.19%,respectively,due to the contribution of 3wt% *** data were supported by the high load of 66.69%and thermal conductivity of 0.59 W·m^(-1)·K-1of the designed *** obtained composite exhibited a phase change temperature of 52.17℃,melting latent heat of 121.5 j·g^(-1),and good chemical *** SC-based composite has prospects in building applications exploiting the secondary utilization of minerals.

关键词： thermal energy storage phase change material stone coal vanadium extraction secondary utilization

Simulation of nuclear isomer production in laser-induced plasma

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matter and Radiation at Extremes 2024年第5期9卷 1-9页

作者： Zhiguo ma Yumiao Wang Yi Yang Youjing Wang Kai Zhao Yixin Li Changbo Fu Wanbing He Yugang ma Key Laboratory of Nuclear Physics and Ion-Beam Application(MoE) Institute of Modern PhysicsFudan UniversityShanghai 200433China

Nuclear isomers play essential roles in various fields,including stellar nucleosynthesis,nuclear clocks,nuclear batteries,clean nuclear energy,and-ray *** technological advances in high-intensity lasers have made it possible to excite or de-excite nuclear isomers using table-top laser *** a particle-in-cell code,we investigate the interaction of a laser with a nanowire array and calculate the production rates of the^(73m)Ge(E_(1)=13.3 keV)and^(107m)Ag(E_(1)=93.1 keV)***^(73m1)Ge,production by Coulomb excitation is found to contribute a peak efficiency of 1.0×10^(19) particles s^(−1)j^(−1),while nuclear excitation by electron capture(NEEC)contributes a peak of 1.65×10^(11)particles s^(−1)j^(−1).These results indicate a high isomeric production ratio,as well as demonstrating the potential for confirming the existence of NEEC,a long-expected but so far experimentally unobserved fundamental process.

关键词： process. isomers excitation

Night warming increases wheat yield by improving pre-anthesis plant growth and post-anthesis grain starch biosynthesis

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journal of Integrative Agriculture 2024年第2期23卷 536-550页

作者： Yonghui Fan Boya Qin jinhao Yang Liangliang ma Guoji Cui Wei He Yu Tang Wenjing Zhang Shangyu ma Chuanxi ma Zhenglai Huang College of Agronomy Anhui Agricultural University/Key Laboratory of Wheat Biology and Genetic Improvement in South Yellow&Huai River ValleyMinistry of Agriculture and Rural AffairsHefei 230036China Xianyang Central Station for Agricultural Technology Extension Xianyang 712000China

Global climate change is characterized by asymmetric warming,i.e.,greater temperature increases in winter,spring,and nighttime than in summer,autumn,and *** experiments were conducted using four wheat cultivars,namely‘Yangmai 18’(YM18),‘Sumai 188’(SM188),‘Yannong 19’(YN19),and‘Annong 0711’(AN0711),in the two growing seasons of 2019-2020 and 2020-2021,with passive night warming during different periods in the early growth *** treatments were night warming during the tillering-jointing(NW_(T-j)),jointing-booting(NWj-B),and booting-anthesis(NWB-A)stages,with ambient temperature(NN)as the *** effects of night warming during different stages on wheat yield formation were investigated by determining the characteristics of dry matter accumulation and translocation,as well as sucrose and starch accumulation in wheat *** wheat yields of all four cultivars were significantly higher in NW_(T-j)than in NN in the 2-year *** yield increases of semi-winter cultivars YN19 and AN0711 were greater than those of spring cultivars YM18 and *** NW_(T-j)increased wheat yield mainly by increasing the 1,000-grain weight and the number of fertile spikelets,and it increased dry matter accumulation in various organs of wheat at the anthesis and maturity stages by increasing the growth rate at the vegetative growth *** flag leaf and spike showed the largest increases in dry matter ***_(T-j)also increased the grain sucrose and starch contents in the early and middle grain-filling stages,promoting yield ***,night warming between the tillering and jointing stages increased the pre-anthesis growth rate,and thus,wheat dry matter production,which contributed to an increase in wheat yield.

关键词： wheat asymmetric warming dry matter accumulation and translocation starch yield

miR-152在结直肠癌组织中的表达及其与预后的关系

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中华肿瘤杂志 2016年第10期38卷 763-766页

作者：汪毅袁伟马肖马洁国家癌症中心中国医学科学院北京协和医学院肿瘤医院VIP病房 100021 国家癌症中心中国医学科学院北京协和医学院肿瘤医院分子肿瘤学国家重点实验室 100021

目的探讨结直肠癌及癌旁组织中miR-152的表达水平及其与结直肠癌术后患者预后的关系。方法采用实时荧光定量PCR法检测202例结直肠癌及癌旁组织中miR-152的表达水平，采用Cox比例风险模型分析miR-152的表达水平与结直肠癌患者预后的关系... 详细信息

目的探讨结直肠癌及癌旁组织中miR-152的表达水平及其与结直肠癌术后患者预后的关系。方法采用实时荧光定量PCR法检测202例结直肠癌及癌旁组织中miR-152的表达水平，采用Cox比例风险模型分析miR-152的表达水平与结直肠癌患者预后的关系。结果miR-152在结直肠癌及癌旁组织巾的相对表达水平分别为2．109±0．217和15．860±6．647，差异有统计学意义（P〈0．001）．miR-152在有、无淋巴结转移的结直肠癌组织中的相对表达水平分别为2．582±0．344和1．640±0．258．差异有统计学意义（P=0．001）。miR-152在Ⅰ～Ⅱ期、Ⅲ期和Ⅳ期结直肠癌组织中的相对表达水平分别为1．640±0．258、2．187±0．361和4．403±0．877，差异有统计学意义（P〈0．05）。单因素Cox回归分析显示，分化程度、淋巴结转移情况、TNM分期和miR-152的表达水平与结直肠癌术后患者的预后均有关（均P〈0．05）。多因素Cox回归分析显示，分化程度和TNM分期为影响结直肠癌患者预后的独立因素（均P〈0．001）。miR-152高表达与结直肠癌患者的不良预后有关（P〈0．05）。结论miR-152在结直肠癌组织中的表达水平低于相应的癌旁组织，miR-152表达水平与结直肠癌患者的淋巴结转移和TNM分期有关。miR-152有可能作为提示结直肠癌患者预后的潜在标志物。

关键词：微RNAs 结直肠肿瘤肿瘤分期肿瘤转移预后

Uncovering the hierarchical clusters in the heat-affected zone of an electron beam weldedα/βtitanium alloy joint

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journal of materials Science & Technology 2024年第7期174卷 120-132页

作者： C.Xu X.H.Shao H.j.Yang M.Lv H.Q.Liu X.L.ma Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Suzhou laboratory Suzhou 215028China Department of Mechanical Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China

Using high-resolution transmission Kikuchi diffraction(TKD)and transmission electron microscopy(TEM),we examined the hierarchical clusters that form in situ in the heat-affected zone(HAZ),which are com-monly referred to as“ghost”structures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr(wt%,TC17).The ghost structures are enriched with Al elements but poor in Mo and Cr compared to the surroundingβ*** results show that the ghost structure in middle-HAZ mainly consists ofα_(L)laths with a high-angle grain boundary,which exhibits the classic Burgers orientation relationship(BOR)with the host matrix,while it encircles theα_(P)grains in *** the ghost structure is evidenced to form via in-complete martensitic *** results further confirm that the ghost structure is composed ofαL and tinyβ_(L)laths with BOR,with the former being enriched with Al and poor with Cr and Mo,while the latter is the ***,twoα_(L)variant clusters with a check-mark morphology are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)directions,which are dominated by the crystallographic and geometrical relationships betweenαandβ*** on the microstructural characterization,it is hypothesized that the ghost structure is transformed from the initialα_(P)phase,due to the coupling ef-fect of high thermal stress(which induces the formation of a large number of dislocations)and element diffusion caused by sudden temperature increase and plunge cooling in the HAZ during the welding pro-cess.

关键词： TC17 titanium alloy Electron beam welding(EBW) The ghost structure Transmission Kikuchi diffraction(TKD) Transmission electron microscopy(TEM)

三维动态增强磁共振血管造影对四肢血管疾病的诊断价值

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中国组织工程研究与临床康复 2007年第44期11卷 8891-8894页

作者：马隽北华大学附属医院MRI科吉林省吉林市132011

目的:应用三维动态增强磁共振血管造影对四肢血管疾病进行诊断,并与"金标准"数字减影血管造影结果对比分析,评价其技术方法的价值。方法:选择2004-05/2007-05在北华大学附属医院经手术病理证实的30例四肢血管疾病患者。①用1.5T超导磁... 详细信息

目的:应用三维动态增强磁共振血管造影对四肢血管疾病进行诊断,并与"金标准"数字减影血管造影结果对比分析,评价其技术方法的价值。方法:选择2004-05/2007-05在北华大学附属医院经手术病理证实的30例四肢血管疾病患者。①用1.5T超导磁共振成像仪(SIEMENS novus1.5T)采集定位像,对兴趣血管注入15mL马根维显(先灵药业有限公司,022H)行三维动态增强磁共振血管造影。②采用Siemens Bicor C形双臂血管造影机,经股动脉采用常规Seldinger法穿刺行数字减影血管造影。③以数字减影血管造影图像为标准,将三维动态增强磁共振血管造影获得的血管图像按照狭窄程度分为4级,狭窄段血管的长度分为3部分。评价2种方法检测测得的血管狭窄程度及狭窄长度的一致性。结果:30例患者的资料均进入结果分析。①数字减影血管造影只观察到与血流相关的信息,而三维动态增强磁共振血管造影能够清楚显示靶血管的正常解剖结构和病变部位,可同时观察到血流、瘤体、骨组织、软组织及其结构关系。②三维动态增强磁共振血管造影测得动脉狭窄程度和长度较数字减影血管造影略高.但二者无显著性差异(P>0.05)。结论:三维动态增强磁共振血管造影对四肢血管病变的诊断与数字减影血管造影有很好的一致性,是一种无创、简便快速的诊断方法,图像清晰,有助于观察血管病变及其与周围结构的关系。

关键词：三维动态增强磁共振血管造影数字减影血管造影四肢血管疾病

OBSERVATION OF MYO-INOSITOL CONCENTRATIONS IN BIPOLAR DISORDER PATIENTS RECEIVING SODIUM VALPROATE:An in vivo Proton MR Spectroscopy Quantitative Study

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波谱学杂志 2002年第1期19卷 96-97页

作者： R.H.WU P.SILVERSTONE j.ma H.Kim H.B.RAO X.H.XU Shantou University Medical College China University of Alberta Canada University of Alberta Canada Dalian Medical University China Shantou University Medical College China

Introduction:Previous magnetic resonance spectroscopy (MRS) studies have suggested that lithium used in patients with bipolar disorder may alter brain myo-inositol concentrations.

关键词： MR OBSERVATION OF MYO-INOSITOL CONCENTRATIONS IN BIPOLAR DISORDER PATIENTS RECEIVING SODIUM VALPROATE MYO