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Magnetic Properties of Thermally Aged Fe-Cu Alloys with Pre-deformation

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Journal of Iron and Steel Research International 2016年第9期23卷 981-987页

作者： yi LI Yuan-fei LI Ben XU qiu-lin LI Guo-gang SHU Wei LIU School of Material Science and Engineering Tsinghua University Graduate School at Shenzhen Tsinghua University China Nuclear Power Engineering Co. Ltd.

Magnetic properties of thermally aged Fe-Cu alloys with pre deformation have been evaluated to improve the understanding of using magnetic technology for the nondestructive evaluation （NDE） of irradiation embrittlement in reactor pressure vessel （RPV） steels. Fe-Cu alloys with and without pre-deformation were thermally aged at 500 ℃ and the changes in microstructure, mechanical properties and magnetic properties were determined. It is found that the strain-induced dislocations recover and the Cu-rich particles precipitate during the aging process, and the magnet- ic properties variation depends on the combined influence of these two factors. From the point of view of NDE, a fully tempered or annealed microstructure is favorable before RPV is put into service. These results improve the un- derstanding of magnetic property evolution in actual RPV steels and help to develop NDE theory for irradiation embrittlement.

关键词： RPV steel nondestructive evaluation magnetic property Cu-rich precipitate dislocation

Low-Temperature Photothermal Therapy:Strategies and Applications

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Research 2021年第1期2021卷 1085-1122页

作者： Xiulin yi qiu-yi Duan Fu-Gen Wu State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast University2 Sipailou RoadNanjing 210096China

Although photothermal therapy(PTT)with the assistance of nanotechnology has been considered as an indispensable strategy in the biomedical field,it still encounters some severe problems that need to be *** heat can induce treated cells to develop thermal resistance,and thus,the efficacy of PTT may be dramatically *** the meantime,the uncontrollable diffusion of heat can pose a threat to the surrounding healthy ***,low-temperature PTT(also known as mild PTT or mild-temperature PTT)has demonstrated its remarkable capacity of conquering these obstacles and has shown excellent performance in bacterial elimination,wound healing,and cancer ***,we summarize the recently proposed strategies for achieving low-temperature PTT based on nanomaterials and introduce the synthesis,characteristics,and applications of these ***,the combination of PTT and other therapeutic modalities for defeating cancers and the synergistic cancer therapeutic effect of the combined treatments are ***,the current limitations and future directions are proposed for inspiring more researchers to make contributions to promoting low-temperature PTT toward more successful preclinical and clinical disease treatments.

关键词： treatment thermal directions

Volatiles in the mantle transition zone and their effects on big mantle wedge systems

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National Science Review 2024年第6期11卷 15-18页

作者： Yu Wang yi-gang Xu State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

The mantle transition zone (MTZ), located between the upper and lower mantle, is characterized by sudden seismicvelocity discontinuities at depths of 410 and 660 km where significant change in mineralogical composition occurs. As a link between the upper and lower mantle,the MTZ is a layer of special significance in Earth’s deep structure, and a critical interface in geodynamics and material circulation.

关键词： systems effects mantle their transition volatiles wedge zone

Preparation,with graphene,of novel biomimetic selfhealing microcapsules with high thermal stability and conductivity

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Frontiers of Structural and Civil Engineering 2023年第8期17卷 1188-1198页

作者： ying-Yuan WANG yi-qiu TAN School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

This paper reports a comparative study of microcapsules with enhanced thermal stability and electrical conductivity inspired by the bionic thermal insulation of birds’feathers for self-healing aged *** work is based on an in situ polymerization with composite shell components of graphene and hexamethoxymethylmelamine *** using graphene,microcapsules with rough surfaces are achieved,improving the interface between microcapsules and *** addition,the microcapsules’initial thermal decomposition temperature is appropriately high,so that the stability of the microcapsule in the asphalt highway system is *** proportion of graphene in the microcapsule shell can regulate the microcapsule’s heat resistance because graphene modifies the shell’s structural ***,the microcapsules’electrical conductivity is relatively *** self-healing capability of bitumen sharply increases,providing benefit to the effect of microcapsules on the properties of aged asphalt.

关键词： graphene microcapsule bitumen heat insulation conductivity

Immunotherapy for multiple myeloma: new chances and hope

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Cancer Biology & Medicine 2023年第10期20卷 695-700页

作者： Jingyu Xu gang An Lugui qiu State Key Laboratory of Experimental Hematology National Clinical Research Center for Blood DiseasesHaihe Laboratory of Cell EcosystemInstitute of Hematology&Blood Diseases HospitalChinese Academy of Medical Science&Peking Union Medical CollegeTianjin 300020China Tianjin Institutes of Health Science Tianjin 301600China

Introduction Multiple myeloma(MM),characterized by the proliferation of monoclonal plasma cells in the bone marrow,has the second highest incidence among hematologic *** of its incurable nature,treatments for MM are aimed primarily at obtaining minimal residual disease(MRD)negativity and achieving persistent control,both of which are believed to be important strategies to prolong survival and improve prognosis in patients with MM.

关键词： myeloma prognosis monoclonal

Higher pressure differentiation of arc magmas under thicker crust

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National Science Review 2023年第3期10卷 100-101页

作者： yi-gang Xu State Key Laboratory of Isotope Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)

The formation of continental crust is pivotal to understanding the evolution of the earth and its *** average intermediate or’andesitic’bulk composition and characteristic depletion of niobium of the continental crust are strikingly matched by convergent margin magmas [1].This has led to the inference that most continental crust is derived from igneous,arc ***,continental crust has characteristically higher Mg#(>0.5) than most oceanic arc andesites (<0.5).

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Microstructure and properties of YG8 cemented carbide with different pulse currents

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Rare Metals 2020年第5期39卷 597-606页

作者： Liao Wei yi Yang gang Yang School of Mechanical Engineering Sichuan UniversityChengdu 610065China College of Arts and Sciences Guangxi Radio and TV UniversityNanning 530022China

In order to study the effect of pulse current treatment on the mechanical properties,microstructure and cutting performance of YG8 cemented carbide,experiments were carried out by using self-made pulse current treatment device to treat cemented carbide samples with different current densities(J=5,10 and 15 A·mm^-2)After the treatment of pulse current,when the current density increased from 5 to 15 A·mm-2,the hardness of the sample was improved to HV 1605,HV 1629 and HV 1653from HV 1574;the transverse rupture strengths of the sample were 2136,2289 and 2364 MPa,which were all higher than that of the untreated sample(2062 MPa)increasing by 3.6%,11.0%and 14.6%,respectively;the corresponding cutting performance was increased by10.1%,13.9%and 19.4%,compared to that of the untreated *** tool’s life was also *** the treatmen of pulse current,pulse current provided the driving force for dislocation motion,making it more likely for the dislocation to multiply and slip,the dislocation density was increased,and the mechanical properties were significantly improved.

关键词： Pulse current YG8 cemented carbide Microstructure Mechanical properties Cutting performance

Event-triggered state estimation for T-S fuzzy affine systems based on piecewise Lyapunov-Krasovskii functionals

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Control Theory and Technology 2019年第1期17卷 99-111页

作者： Meng WANG Jianbin qiu gang FENG Department of Biomedical Engineering City University of Hong Kong Kowloon Hong Kong China State Key Laboratory of Robotics and Systems & Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin Heilongjiang 150080 China

This paper investigates the problem of event-triggered H∞state estimation for Takagi-Sugeno (T-S) fuzzy affine systems. The objective is to design an event-triggered scheme and an observer such that the resulting estimation error system is asymptotically stable with a prescribed H∞performance and at the same time unnecessary output measurement transmission can be reduced. First, an event-triggered scheme is proposed to determine whether the sampled measurements should be transmitted or not. The output measurements, which trigger the condition, are supposed to suffer a network-induced time-varying and bounded delay before arriving at the observer. Then, by adopting the input delay method, the estimation error system can be reformulated as a piecewise delay system. Based on the piecewise Lyapunov-Krasovskii functional and the Finsler's lemma, the event-triggered H∞observer design method is developed. Moreover, an algorithm is proposed to co-design the observer gains and the event-triggering parameters to guarantee that the estimation error system is asymptotically stable with a given disturbance attenuation level and the signal transmission rate is reduced as much as possible. Simulation studies are given to show the effectiveness of the proposed method.

关键词： Takagi-Sugeno (T-S) fuzzy affine systems event-triggered scheme, piecewise Lyapunov-Krasovskii functional, state estimation

Superoscillation:from physics to optical applications

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Light(Science & Applications) 2019年第1期8卷 688-710页

作者： gang Chen Zhong-Quan Wen Cheng-Wei qiu College of Optoelectronic Engineering Chongqing University174 Shazheng StreetChongqing 400044China Department of Electrical and Computer Engineering National University of Singapore4 Engineering Drive 3Singapore 117583Singapore

The resolution of conventional optical elements and systems has long been perceived to satisfy the classic Rayleigh *** efforts have been made to develop different types of superresolution techniques to achieve optical resolution down to several nanometres,such as by using evanescent waves,fluorescence labelling,and *** imaging techniques,which are noncontact,far field and label free,are highly desirable but challenging to *** concept of superoscillation offers an alternative route to optical superresolution and enables the engineering of focal spots and point-spread functions of arbitrarily small size without theoretical *** paper reviews recent developments in optical superoscillation technologies,design approaches,methods of characterizing superoscillatory optical fields,and applications in noncontact,far-field and label-free superresolution *** work may promote the wider adoption and application of optical superresolution across different wave types and application domains.

关键词： optical oscillation resolution