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Journal of Iron and Steel Research International 2022年第1期29卷 124-131页

作者： dong-bin Jiang Li-feng Zhang ya-dong wang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Lab of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina

The effect of mold electromagnetic stirring(M-EMS)on the solidification structure and solute segregation in the continuous casting bloom of U78CrV steel is *** solute distribution in the macroscale is analyzed using a carbon–sulfur analyzer and that in the microscale is measured with an electron probe *** Image-J software is applied to analyze the number density and area ratio of segregation *** results show that the segregation spots are mainly located in the columnar to equiaxed transition zone and the equiaxed zone,which are enriched with C,Cr,and Mn *** the M-EMS applied,the columnar grain inclines to the upstream *** the current intensity increases,the deflecting angle of columnar grain rises,especially with the current intensity larger than 300 ***,the center segregation shows a declining trend and the area fraction of the equiaxed zone rises ***,it is found that the area ratio and number density of segregation spots increase with the higher current intensity of M-EMS.

关键词： Solidification structure Macrosegregation Mesosegregation Segregation spot Mold electromagnetic stirring

Effect of nozzle type on fluid flow, solidification, and solute transport in mold with mold electromagnetic stirring

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Journal of Iron and Steel Research International 2022年第2期29卷 237-246页

作者： ya-dong wang Li-feng Zhang Wen yang Ying Ren School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China State Key Lab of Metastable Materials Science and Technology School of Mechanical EngineeringYanshan UniversityQinhuangdao066004HebeiChina

The mathematical model of coupling fluid flow,heat transfer,solidification,solute transport,and the electromagnetic field of the bloom in the upper part of the strand was established with three nozzle ***,the flow field,distribution of the temperature,solidification,and macrosegregation of carbon were investigated and compared by numerical *** the case of the straight submerged entry nozzle(SEN),the molten steel flows down deep into the liquid pool,and the depth of the jet flow reaches about 1.0 m beneath the *** jetting zone is the high-temperature *** the case of two-port SEN and four-port SEN,the flow patterns and distribution of temperature in the central longitudinal section are *** jet flow impinges directly on the initially solidified shell and then it is divided into two longitudinal *** heat of molten steel is dissipated along with the longitudinal *** negative segregation band was generated near the bloom surface due to the washing effect by the rotating flow at the solidification front with three nozzle *** negative segregation deteriorates gradually with the number of ports decreasing.

关键词： Submerged entry nozzle Fluid flow Solidification Solute transport Mold electromagnetic stirring

A Multi-Interface Remote Monitoring and Control System Architecture Based on Embedded Server

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Journal of Harbin Institute of Technology(New Series) 2013年第6期20卷 67-76页

作者： He Liu Lei wang Sheng-Peng Sun ya-dong wang Dep. of Biomedical Engineering Harbin Institute of Technology Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Dep. of Measurement-Control Technology Harbin University of Science and Technology

This paper presents a multi-interface embedded server architecture for remote real-time monitoring system and distributed monitoring applications. In the scheme,an embedded microprocessor( LPC3250 from NXP) is chosen as the CPU of the embedded server with a linux operation system( OS) environment. The embedded server provides multiple interfaces for supporting various application scenarios. The whole network is based on local area network and adopts the Browser / Server( B / S) model. The monitoring and control node is as a browser endpoint and the remote node with an embedded server is as a server endpoint. Users can easily acquire various sensors information through writing Internet protocol address of remote node on the computer browser. Compared with client / server( C / S) mode,B / S model needs less maintain and can be applicable to large user group. In addition,a simple network management protocol( SNMP) is used for management of devices in Internet protocol( IP) networks. The results of the demonstration experiment show that the proposed system gives good support to manage the network from different user terminals and allows the users to better interact with the ambient environment.

关键词： muhi-interface remote monitoring and control embedded server simple network management protocol (SNMP)CLC number:TP216+.1 Document code:AArticle ID:1005-9113(2013)06-0067-10

Effects of final rolling temperature and coiling temperature on precipitates and microstructure of high-strength low-alloy pipeline steel

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Journal of Iron and Steel Research International 2022年第8期29卷 1236-1244页

作者： ya-dong wang Zheng-hua Tang Su-fen Xiao Charles WSiyasiya Tao Wei Department of Materials Science and Engineering Sichuan UniversityChengdu 610065SichuanChina Department of Materials Science and Metallurgical Engineering University of PretoriaPretoria 0028South Africa

The strength-to-weight ratio is an important property of high-strength low-alloy(HSLA)steel in pipeline,whose precipitation strengthening can be *** final rolling temperature(FRT)and coiling temperature(CT)are the key process parameters in the control of precipitates and *** cooling rate was fixed at 10℃/s,and the effects of deformation and coiling temperatures on precipitates and microstructure of Ti-Nb microalloyed HSLA steel were investigated through thermo-mechanical controlled processing on Gleeble *** microstructure is mainly acicular ferrite with high density dislocation and several microns *** size and volume fraction of the precipitates were studied under transmission electron *** results showed that the diameter of the precipitates was in the range between 4 and 240 *** optimized combination of parameters is FRT of 820℃and CT of 550℃,and the volume fraction of precipitates obtained under this process is 0.59%.

关键词： Precipitate Thermo-mechanical controlled processing Final rolling temperature Coiling temperature High-strength low-alloy steel (Ti,Nb)C

Electric field manipulation of magnetic skyrmions

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Rare Metals 2022年第12期41卷 4000-4014页

作者： ya-dong wang Zhi-Jian Wei Hao-Ran Tu Chen-Hui Zhang Zhi-Peng Hou Guangdong Provincial Key Laboratory of Optical Information Material and Technology&Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China dongguan University of Technology Dongguan 523808China Physical Science and Engineering Division(PSE) King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Magnetic skyrmions are vortex-like swirling spin textures that are promising candidates for carrying information bits in future magnetic memories or logic *** build skyrmionic devices,researchers must electrically manipulate magnetic skyrmions to enable easy integration into modern semiconductor *** operation generally uses a spin-polarized current,which unavoidably causes high energy dissipation and Joule ***,the electric-field strategy is a hopeful alternative for electrically manipulating the skyrmions due to the strategy’s negligible Joule heating and low energy *** this review,we systematically summarize the theoretical and experimental development of the electricalfield manipulation of magnetic skyrmions over the past *** review the following magnetic systems and physical mechanisms:(ⅰ)ultra-thin multilayer films with accumulation and release of interfacial charge,(ⅱ)singlephase multiferroic material with magneto-electric coupling,(ⅲ)ferromagnetic/ferroelectric(FM/FE)multiferroic heterostructure with magneto-elastic ***,we consider future developmental trends in the electric-field manipulation of magnetic skyrmions and other topological magnetic domain structures.

关键词： Magnetic skyrmion Electric field Low energy cost Dzyaloshinskii-Moriya interaction(DMI)

Successful treatment of veno-arterial extracorporeal membrane oxygenation complicated with left ventricular thrombus by intravenous thrombolysis:A case report

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World Journal of Clinical Cases 2023年第14期11卷 3323-3329页

作者： ya-dong wang Jin-Feng Lin Xiao-Ying Huang Xu-dong Han Intensive Care Medicine Nantong Third People's HospitalNantong 226000Jiangsu ProvinceChina Critical Care Medicine Nantong Third People’s HospitalNantong 226000Jiangsu ProvinceChina

BACKGROUND Left ventricular thrombus is a rare condition,for which appropriate treatments are not extensively *** it can be treated by thrombectomy,such surgery can be difficult and risky,and not every patient can tolerate the *** SUMMARY We report a case of a middle-aged man receiving veno-arterial extracorporeal membrane oxygenation(VA-ECMO)for acute myocardial infarction who developed left ventricular thrombus despite systemic *** systemic thrombolysis with urokinase,the left ventricular thrombus disappeared,ECMO was successfully withdrawn 9 days later,and the patient recovered and was discharged from *** Systemic thrombolysis is a treatment option for left ventricular thrombus in addition to anticoagulation and thrombectomy.

关键词： Extracorporeal membrane oxygenation Left ventricular thrombus Thrombolysis Case report

Exosomes derived from bone marrow mesenchymal stem cells inhibit neuroinflammation after traumatic brain injury

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Neural Regeneration Research 2022年第12期17卷 2717-2724页

作者： Liang Wen ya-dong wang dong-Feng Shen Pei-dong Zheng Meng-Di Tu Wen-dong You Yuan-Run Zhu Hao wang Jun-Feng Feng Xiao-Feng yang The First Affiliated Hospital School of MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Intensive Care Unit The First Hospital of JiaxingJiaxingZhejiang ProvinceChina Department of Neurosurgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina

Exosomes derived from bone marrow mesenchymal stem cells can inhibit neuroinflammation through regulating microglial phenotypes and promoting nerve injury ***,the underlying molecular mechanism remains *** this study,we investigated the mechanism by which exosomes derived from bone marrow mesenchymal stem cells inhibit *** in vitro co-culture experiments showed that bone marrow mesenchymal stem cells and their exosomes promoted the polarization of activated BV2 microglia to their anti-inflammatory phenotype,inhibited the expression of proinflammatory cytokines,and increased the expression of anti-inflammatory *** in vivo experiments showed that tail vein injection of exosomes reduced cell apoptosis in cortical tissue of mouse models of traumatic brain injury,inhibited neuroinflammation,and promoted the transformation of microglia to the anti-inflammatory *** screened some microRNAs related to neuroinflammation using microRNA sequencing and found that microRNA-181b seemed to be actively involved in the ***,we regulated the expression of miR181b in the brain tissue of mouse models of traumatic brain injury using lentiviral *** found that miR181b overexpression effectively reduced apoptosis and neuroinflamatory response after traumatic brain injury and promoted the transformation of microglia to the anti-inflammatory *** interleukin 10/STAT3 pathway was activated during this *** findings suggest that the inhibitory effects of exosomes derived from bone marrow mesenchymal stem cells on neuroinflamation after traumatic brain injury may be realized by the action of miR181b on the interleukin 10/STAT3 pathway.

关键词： apoptosis bone marrow mesenchymal stem cells BV2 microglia exosome interleukin 10 lentiviral transfection microRNA-181b neuroinflammation phenotype signal transducer and activator of transcription 3 traumatic brain injury

Dynamic recombination of triplet excitons in polymer heterojunctions

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Chinese Physics B 2020年第11期29卷 463-468页

作者： ya-dong wang Jian-Jun Liu Xi-Ru wang yan-Xia Liu yan Meng College of Information Science and Engineering Hebei North UniversityZhangjiakou 075000China Department of Electronics Polytech Nice SophiaNice 06200France Department of Physics Xingtai UniversityXingtai 054001China

The dynamic recombination of two triplet excitons with opposite spins in the heterojunction structure has been investigated using a nonadiabatic evolution *** demonstrate that luminous composite states including the excited polaron and the biexciton can be formed efficiently via the triplet exciton-triplet exciton reaction in the heterojunction and therefore this reaction can enhance the electroluminescence efficiency considerably,which is consistent qualitatively with experimental ***,we find that,although the heterojunctions are beneficial to the generation of luminescent particles,large band offset caused by the heterojunction structure is not helpful to improve the electroluminescence *** addition,the mechanism of the triplet exciton-triplet exciton reaction in heterojunction is different from that of two similar coupling *** results may deepen the understanding of the electroluminescence mechanism in polymer light-emitting devices.

关键词： polymers electron-lattice interaction excitons

Abnormal low-field M-type magnetoresistance in hexagonal noncollinear ferromagnetic MnFeGe alloy

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Rare Metals 2022年第8期41卷 2680-2687页

作者： Jia-Xuan Tang Pei-Hao wang Yu-Rong You ya-dong wang Zhan Xu Zhi-Peng Hou Hong-Guo Zhang Gui-Zhou Xu Feng Xu MIIT Key Laboratory of Advanced Metallic and Internetallic Materials Technology School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing100124China

The new magnetic degree of freedom provided by the noncollinear structure plays an important role in the development of spintronic *** this work,we conducted a systematic study on the magnetic and electrical transport properties of the hexagonal noncollinear ferromagnetic MnFeGe *** Hall effect and moderate magnetoresistance(MR)were observed below the Curie temperature(~200 K)of MnFeGe,in both bulk and thin-film ***,the perpendicular MR in all samples firstly grows,then quasi-linearly descends with magnetic field increasing,making an irregular M-type MR in the low-field *** is speculated that the abnormal MR is related to the magnetic domain change,and combined with micromagnetic simulations,the labyrinth domain and sparse bubble formation are verified to exist in *** work offers an understanding of the lowfield-positive MR in a ferromagnet,as well as raises the possibility of magnetic bubble formation in this noncollinear system.

关键词： M-type magnetoresistance Noncollinear MnFeGe Skyrmionic bubbles

Human umbilical cord Wharton’s jelly-derived mesenchymal stem cell transplantation could improve diabetic intracavernosal pressure

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Asian Journal of Andrology 2022年第2期24卷 171-175页

作者： Jian-Hong Wu dong-ya wang Lu Sheng Wei-Qing Qian Shu-Jie Xia Qi Jiang Department of Urology Shanghai General Hospital of Nanjing Medical UniversityShanghai 200080China Department of Urology Huadong Hospital Affiliated to Fudan UniversityShanghai 200040China Department of Urology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China

Mesenchymal stem cells(MSCs)secrete various cytokines with angiogenic and neuroprotective *** study aimed to assess the effects of human umbilical cord Wharton’s jelly-derived MSCs(hWJ-MSCs)on diabetes-related intracavernosal pressure(ICP)impairment in ***-MSCs were isolated from human umbilical cord Wharton’s jelly and transplanted into the corpus cavernosum of streptozotocin(STZ)-induced diabetic rats by unilateral *** erectile function was evaluated at 4 weeks,as well as the expression levels of vascular endothelial growth factor(VEGF),basic fibroblast growth factor(bFGF),endothelial nitric oxide synthase(eNOS),and insulin-like growth factor 1(IGF1).STZ-induced diabetic rats showed impaired ICP,which was significantly improved by hWJ-MSC ***,eNOS,IGF1,and bFGF expression levels were higher in hWJ-MSC injection sites than those in control ones in STZ-induced diabetic *** results suggest that hWJ-MSC transplantation might improve diabetic erectile dysfunction through increased production of paracrine growth factors,highlighting a novel potential therapeutic option for erectile dysfunction.

关键词： diabetes endothelial nitric oxide synthase erectile dysfunction mesenchymal stem cells vascular endothelial growth factor