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Microstructure characteristics of 12Cr ferritic/martensitic steels with various yttrium

Journal of Rare Earths 2019年第5期37卷 547-554页

作者： Yingxue Chen feifei zhang Qingzhi Yan Xiaoxin zhang Zhiyuan Hong Institute of Nuclear Materials School of Materials Science and Engineering University of Science and Technology Beijing Department of Reactor Engineering and Safety Research Center China Nuclear Power Technology Research Institute Advanced Energy Research Center Shenzhen University Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University

12Cr ferritic/martensitic steels with 0, 0.1 wt%, 0.2 wt% and 0.3 wt% theoretical yttrium(Y) additions were fabricated by vacuum inducting melting and casting method. Solubilities of Y in the 12Cr steels are0.027, 0.078 and 0.17 for 12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively. Phase transformations and microstructure characteristics under different heat-treatment schedules were investigated. The starting temperature of ferrite-to-austenite transformation A^(c1) are maintained about 850℃, but the finishing temperature of ferrite-to-austenite transformation A^(c3) are about 950, 970, 980 and 1000℃ for 12Cr-0 Y,12Cr-0.1 Y, 12Cr-0.2 Y and 12Cr-0.3 Y, respectively, which indicates that A^(c3) increases gradually with the addition of Y. Martensite accompanied with a few δ-ferrite is the dominant structure in all the steels. The amount of δ-ferrite shows a strong dependence with the Y content and austenitizing temperature. Area fraction of δ-ferrite increases with the content of Y, which is the ferrite favouring element. The minimum amount of δ-ferrite are achieved at 950℃ for 12Cr-0 Y, 12Cr-0.1 Y, 12Cr-0.2 Y and 1000℃ for 12Cr-0.3 ***, more carbides precipitate along the martensite laths and grain boundaries in the Y-bearing steel due to the redistribution of carbon between austenite and ferrite resulting from the ferrite favouring element of Y.

关键词： 12Cr ferritic/martensitic steel Yttrium Casting Phase transformation Microstructure characteristics Rare earths

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Overview on the Prediction Models for Sheet Metal Forming Failure:Necking and Ductile Fracture

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Acta Mechanica Solida Sinica 2018年第3期31卷 259-289页

作者： Qi Hu feifei zhang Xifeng Li Jun Chen Department of Plasticity Technology Shanghai Jiao Tong UniversityShanghai 200030China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

The formability of the material determines the amount of available deformation before failure and thus is important for the production of various structural components in industries. The workability of materiMs is commonly evaluated by different forms of failure mod- els during sheet metal forming （SMF） processes. In order to provide a whole picture about the prediction models for SMF failure, necking-related formability and ductile fracture-related forma- bility studies in SMF processes are systematically summarized, the applicability and limitation of each model are highlighted, and the link between forming limit diagram and ductile fracture criterion is pointed out, Conclusions about some critical issues on failure in SMF are made.

关键词： Necking Ductile fracture Failure model Sheet metal forming

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On Case Roles in Case Grammar

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国际商务（对外经济贸易大学学报） 1990年第3期 49-59,65页

作者： zhang feifei

A. Introduction More than a score of years have passed since the emergence of what is now generally referred to as acase grammar" initiated by American linguist Charles J. Fillmore. The key issues that arrest the wide-spread growth of case grammar as a well-established linguistic theory cover: What should be the exhaustive list of semantic cases?

关键词： On Case Roles in Case Grammar

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Pose-robust feature learning for facial expression recognition

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Frontiers of Computer Science 2016年第5期10卷 832-844页

作者： feifei zhang Yongbin YU Qirong MAO Jianping GOU Yongzhao ZHAN School of Computer Science and Communication Engineering Jiangsu University Zhenjiang 212013 China

Automatic facial expression recognition （FER） from non-frontal views is a challenging research topic which has recently started to attract the attention of the research community. Pose variations are difficult to tackle and many face analysis methods require the use of sophisticated nor- malization and initialization procedures. Thus head-pose in- variant facial expression recognition continues to be an is- sue to traditional methods. In this paper, we propose a novel approach for pose-invariant FER based on pose-robust fea- tures which are learned by deep learning methods -- prin- cipal component analysis network （PCANet） and convolu- tional neural networks （CNN）（PRP-CNN）. In the first stage, unlabeled frontal face images are used to learn features by PCANet. The features, in the second stage, are used as the tar- get of CNN to learn a feature mapping between frontal faces and non-frontal faces. We then describe the non-frontal face images using the novel descriptions generated by the maps, and get unified descriptors for arbitrary face images. Finally, the pose-robust features are used to train a single classifier for FER instead of training multiple models for each spe- cific pose. Our method, on the whole, does not require pose/ landmark annotation and can recognize facial expression in a wide range of orientations. Extensive experiments on two public databases show that our framework yields dramatic improvements in facial expression analysis.

关键词： facial expression recognition pose-robust fea-tures principal component analysis network (PCANet) con-volutional neural networks (CNN)

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Petrogenesis and tectonic implications of Early Cretaceous andesitic-dacitic rocks,western Qinling(Central China):Geochronological and geochemical constraints

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Geoscience Frontiers 2019年第4期10卷 1507-1520页

作者： feifei zhang Peter A. Cawood Yunpeng Dong Yuejun Wang State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Department of Earth Sciences University of St.AndrewsNorth StreetSt.Andrews KY16 9ALUK School of Earth Atmosphere and EnvironmentMonash UniversityMelbourneVictoria 3800Australia Guangdong Provincial Key Lab of Geodynamics and Geohazards School of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China

40Ar/39Ar and zircon U-Pb geochronological and whole-rock geochemical analyses for the Laozanggou intermediate-acidic volcanic rocks from the western Qinling orogenic belt,Central China,constrain their petrogenesis and the nature of the Late Mesozoic lithospheric *** volcanic rocks yield hornblende or whole-rock 40Ar/39Ar plateau ages of 128.3-129.7 Ma and zircon U-Pb age of131.3±1.3 *** exhibit SiO2 of 56.86-66.86 wt.%,K2 O of 0.99-2.46 wt.%and MgO of 1.03-4.47 wt.%,with Mg#of *** are characterized by arc-like geochemical signatures with significant enrichment in LILE and LREE and depletion in *** the samples have enriched Sr-Nd isotopic compositions with initial 87Sr/86Sr ratios ranging from 0.7112 to 0.7149 andεNd(t)values from 10.2 to *** geochemical signatures suggest that these volcanic rocks were derived from enriched lithospherederived magma followed by the assimilation and fractional crystallization(AFC)*** generation of the enriched lithospheric mantle is likely related to the modification of sediment-derived fluid in response to the Triassic subduction/collision event in Qinling orogenic *** early Cretaceous detachment of the lithospheric root provides a reasonable mechanism for understanding the petrogenesis of the Laozanggou volcanic sequence in the western Qinling orogenic belt.

关键词： 40Ar/39Ar and zircon U-Pb geochronology Sr-Nd isotopes Early Cretaceous AFC process Continental lithospheric mantle Western Qinling orogenic belt

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Review on supermolecules as chemical drugs

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Science China Chemistry 2009年第4期52卷 415-458页

作者： ZHOU ChengHe GAN LinLing zhang YiYi zhang feifei WANG GuangZhou JIN Lei GENG RongXia School of Chemistry and Chemical Engineering Southwest UniversityChongqing 400715China School of Pharmaceutical Sciences Southwest UniversityChongqing 400715China

Supramolecular medicinal chemistry field has been a quite rapidly developing,increasingly active and newly rising interdiscipline which is the new expansion of supramolecular chemistry in pharmaceu-tical sciences,and is gradually becoming a relatively independent scientific area. Supramolecular drugs could be defined as medicinal supermolecules formed by two or more molecules through non-covalent bonds. So far a lot of supermolecules as chemical drugs have been widely used in clinics. Supermolecules as chemical drugs,i.e. supramolecular chemical drugs or supramolecular drugs,which might have the excellences of lower cost,shorter period,higher potential as clinical drugs for their successful research and development,may possess higher bioavailability,better biocompatibility and drug-targeting,fewer multidrug-resistances,lower toxicity,less adverse effect,and better curative effects as well as safety,and therefore exhibit wide potential application. These overwhelming advan-tages have drawn enormous special attention. This paper gives the definition of supramolecular drugs,proposes the concept of supramolecular chemical drugs,and systematically reviews the recent ad-vances in the research and development of supermolecules,including organic and inorganic complex ones as chemical drugs in the area of antitumor,anti-inflammatory,analgesic,antimalarial,antibacterial,antifungal,antivirus,anti-epileptic,cardiovascular agents and magnetic resonance imaging agents and so on. The perspectives of the foreseeable future and potential application of supramolecules as chemical drugs are also presented.

关键词： supramolecular chemistry cyclodextrin porphyrin complex anticancer anti-inflammatory antibacterial antifungal antivirus cardiovascular agent magnetic resonance imaging agent supramolecular drug

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Inhibitory leukocyte immunoglobulin-like receptors in cancer development

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Science China(Life Sciences) 2015年第12期58卷 1216-1225页

作者： zhang feifei ZHENG JunKe KANG XunLei DENG Mi LU ZhiGang KIM Jaehyup zhang ChengCheng Hongqiao International Institute of Medicine Shanghai Tongren Hospital Faculty of Basic Medicine Shanghai Jiao Tong University School of Medicine Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education Shanghai Jiao Tong University School of Medicine Departments of Physiology and Developmental Biology University of Texas Southwestern Medical Center

Inhibitory leukocyte immunoglobulin-like receptors(LILRB1-5) signal through immunoreceptor tyrosine-based inhibitory motifs(ITIMs) in their intracellular domains and recruit phosphatases protein tyrosine phosphatase, non-receptor type 6(PTPN6, SHP-1), protein tyrosine phosphatase, non-receptor type 6(PTPN6, SHP-2), or Src homology 2 domain containing inositol phosphatase(SHIP) to negatively regulate immune cell activation. These receptors are known to play important regulatory roles in immune and neuronal functions. Recent studies demonstrated that several of these receptors are expressed by cancer cells. Importantly, they may directly regulate development, drug resistance, and relapse of cancer, and the activity of cancer stem cells. Although counterintuitive, these findings are consistent with the generally immune-suppressive and thus tumor-promoting roles of the inhibitory receptors in the immune system. This review focuses on the ligands, expression pattern, signaling, and function of LILRB family in the context of cancer development. Because inhibition of the signaling of certain LILRBs directly blocks cancer growth and stimulates immunity that may suppress tumorigenesis, but does not disturb normal development, LILRB signaling pathways may represent ideal targets for treating hematological malignancies and perhaps other tumors.

关键词： immunoreceptor tyrosine-based inhibitory motifs immunoreceptor tyrosine-based activation motif leukocyte immunoglobulin-like receptor subfamily B immunoglobulin-like transcript leukocyte immunoglobulin-like receptor phosphatase ITIM ITAM LILRB CD85 ILT LIR SHP-1 SHP-2 SHIP MHC HLA signal transduction leukemia cancer

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Structural features in the mid-southern section of the Kyushu–Palau Ridge based on satellite altimetry gravity anomaly

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Acta Oceanologica Sinica 2024年第4期43卷 50-60页

作者： feifei zhang Dingding Wang Xiaolin Ji Fanghui Hou Yuan Yang Wanyin Wang School of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China Information and Navigation College Air Force Engineering UniversityXi’an 710077China National Engineering Research Center of Offshore Oil and Gas Exploration Beijing 100028China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China

The Kyushu–Palau Ridge(KPR),an anti-S-shaped submarine highland at the center of the Philippine Sea Plate(PSP),is considered the residual arc of the Izu–Bonin–Mariana Island Arc,which retains key information about the cessation of the Western Philippine Basin(WPB)expansion and the Parece Vela Basin(PVB)***,using the new generation of satellite altimetry gravity data,high-precision seafloor topography data,and newly acquired ship-borne gravity data,the topographic and gravity characteristics of the KPR mid-southern section and adjacent region are *** distribution characteristics of the faults were delineated using the normalized vertical derivative–total horizontal derivative method(NVDR-THDR)and the minimum curvature potential field separation *** Moho depth and crustal thickness were inverted using the rapid inversion method for a double-interface model with depth *** on these results,the crust structure features in the KPR mid-southern section,and the“triangular”structure geological significance where the KPR and Central Basin Rift(CBR)of the WPB intersect are *** KPR crustal thickness is approximately 6–16 km,with a distinct discontinuity that is slightly thicker than the normal oceanic *** KPR mid-southern section crust structure was divided into four segments(S1–S4)from north to south,formed by the CBR eastward extension joint action and clockwise rotation of the PVB expansion axis and the Mindanao fault zone blocking effect.

关键词： structural features satellite altimetry gravity data Kyushu-Palau Ridge Central Basin Rift faults Moho depth

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Capturing and tracking of building area based on structure saliency in airborne remote sensing video

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Science China(Information Sciences) 2015年第4期58卷 176-178页

作者： FENG Jing BI FuKun CHEN Liang zhang feifei CHEN He School of Information and Electronics Beijing Institute of Technology College of Information Engineering North China University of Technology

Dear editor,Object capturing and tracking in airborne remote sensing video is one of the hottest research topics,which is widely used in disaster monitoring and rescue and vehicle *** of the high realtime requirement ... 详细信息

关键词： Capturing and tracking of building area based on structure saliency in airborne remote sensing video SIFT area

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How to Build a High-Resolution Digital Geological Timeline?

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Journal of Earth Science 2022年第6期33卷 1629-1632页

作者： Shuzhong Shen Junxuan Fan Xiangdong Wang feifei zhang Yukun Shi Shuhan zhang State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringFrontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing210023China

1 QUESTION FORMULATION Time and space are the two basic axes to characterize the existence of matter. Without time, there would be no rate(“No dates, No rates”). The Earth has a history of approximately 4.5 billion years, leaving behind a myriad of geological records,and the geologic timeline is the only common language available to unravel the evolutionary history of the Earth.

关键词： approximate Resolution Earth

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