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Microstructure Characterization and Fracture Toughness of Laves Phase-Based Cr–Nb–Ti Alloys

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Acta Metallurgica Sinica(English Letters) 2015年第4期28卷 514-520页

作者： Yun-Long Xue shuang-Ming Li Hong Zhong Lai-Ping Li Heng-Zhi fu State Key Laboratory of Solidification Processing Northwestern Polytechnical University Northwest Institute for Non-Ferrous Metal Research

Three Laves phase-based alloys with nominal compositions of Cr2Nb-xTi （x = 20, 30, 40, in at%） have been prepared through vacuum non-consumable arc melting. The results show that the microstructures of Cr2Nb-（20, 30） Ti alloys are composed of the primary Laves phase C15-Cr2（Nb,Ti） and bcc solid solution phase, while the microstructure of Cr2Nb-40Ti alloy is developed with the eutectic phases C15-Cr2（Nb,Ti）/bcc solid solution. The measured fracture toughness of ternary Laves phase C15-Cr2（Nb,Ti） is about 3.0 MPa m1/2, much larger than 1.4 MPa m1/2 for binary Laves phase Cr2Nb. Meanwhile, the fracture toughness of Cr2Nb-xTi （x = 20, 30, 40） alloys increases with increasing Ti content and reaches 10.6 MPa m1/2 in Cr2Nb-40Ti alloy. The eutectic microstructure and addition of Ti in Cr2Nb are found to be effective in toughening Laves phase-based alloys.

关键词： Laves phase-based alloys Microstructure characterization Fracture toughness Crackpropagation Fracture

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： Jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang Junwu Zhu Yongsheng fu Key Laboratory for Soft Chemistry and functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

Chaff Jamming Recognition of Radar

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Journal of Beijing Institute of Technology 2018年第1期27卷 43-50页

作者： Min Xie shuang Zhao Xiongjun fu Tianyu Zhang Kaiqiang Liu School of Information and Electronics Beijing Institute of Technology

A modified chaff jamming recognition method of radar is investigated using grey relational analysis（ GRA） based on the difference in echo correlation characteristics between a complex rigid target and chaff cloud in time domain. Slice method（ SM）,a novel modeling approach,is proposed to construct an electromagnetic scattering model of chaff cloud in a scenario with slowly moving platform that is targeted. The diffusion characteristics and echo characteristics of the chaff cloud are analyzed. The GRA of a real target and chaff cloud shows that the adjacent return waves have a good correlation for the target but a weak correlation for chaff cloud. Since the correlation degree of chaff cloud＇s echo is far lower than that of a complex rigid target＇s,the chaff jamming can be identified by setting a reasonable threshold. Simulation results are presented to verify the effectiveness of this method.

关键词： chaff jamming anti-jamming grey relational analysis radar

Primary hepatic angiosarcoma manifesting as hepatic sinusoidal obstruction syndrome:A case report

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World Journal of Gastrointestinal Oncology 2022年第5期14卷 1050-1056页

作者： fu-shuang Ha Hua Liu Tao Han De-Zhao Song The Third Central Clinical College of Tianjin Medical University Tianjin 300170China Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases Tianjin 300170China Artificial Cell Engineering Technology Research Center Tianjin 300170China Tianjin Institute of Hepatobiliary Disease Tianjin 300170China Tianjin Union Medical Center Naikai University Affiliated HospitalTianjin 300121China

BACKGROUND Primary hepatic angiosarcoma(PHA)is a rare malignancy with a poor *** is difficult to diagnose PHA because of the lack of specific symptoms or tumour markers,and it rapidly progresses and has a high *** our knowledge,PHA has not been reported to mimic hepatic sinusoidal obstruction ***,we present a case of PHA manifesting as hepatic sinusoidal obstruction syndrome,diagnosed using transjugular liver biopsy,that resulted in the death of the *** SUMMARY A 71-year-old man was admitted with the primary complaint of abdominal distension,decreased appetite,fatigue in the previous month,and loss of 10 kg of weight in the past 2 *** the liver and spleen were enlarged,and the liver had a medium-hard texture on *** examinations were performed,and abdominal plain computed tomography(CT)and contrastenhanced CT showed hepatomegaly and splenomegaly,as well as diffuse lowdensity shadows distributed in the liver and ***-enhanced CT revealed diffuse,hypodense,nodular or flake shadows in the liver and heterogeneous enhancement in the spleen.A transjugular liver biopsy was *** on the pathology results,the patient was diagnosed with hepatic sinusoidal obstruction syndrome secondary to *** patient’s status further deteriorated and he developed serious hepatic *** patient was discharged,and died 3 d *** PHA is rare and has a poor prognosis;however,transjugular liver biopsy can be safely performed to aid in diagnosis.

关键词： Hepatic angiosarcoma Hepatic sinusoidal obstruction syndrome Outcome Primary cancer High mortality Case report

CFD Study of NO_x Emissions in a Model Commercial Aircraft Engine Combustor

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Chinese Journal of Aeronautics 2012年第6期25卷 854-863页

作者： ZHANG Man fu Zhenbo lin Yuzhen LI Jibao AVIC Commercial Aircraft Engine Co. Ltd. Shanghai 200241 China National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics Beihang University Beijing 100191 China

Air worthiness requirements of the aircraft engine emission bring new challenges to the combustor research and design. With the motivation to design high performance and clean combustor, computational fluid dynamics （CFD） is utilized as the powerful design approach. In this paper, Reynolds averaged Navier-Stokes （RANS） equations of reactive two-phase flow in an experimental low emission combustor is performed. The numerical approach uses an implicit compressible gas solver together with a Lagrangian liquid-phase tracking method and the extended coherent flamelet model for turbulence-combustion interaction. The NOx formation is modeled by the concept of post-processing, which resolves the NOx transport equation with the assumption of frozen temperature distribution. Both turbulence-combustion interaction model and NOx formation model are firstly evaluated by the comparison of experimental data published in open literature of a lean direct injection （LDI） combustor. The test rig studied in this paper is called low emission stirred swirl （LESS） combustor, which is a two-stage model combustor, fueled with liquid kerosene （RP-3） and designed by Beihang University （BUAA）. The main stage of LESS combustor employs the principle of lean prevaporized and premixed （LPP） concept to reduce pollutant, and the pilot stage depends on a diffusion flame for flame stabili-zation. Detailed numerical results including species distribution, turbulence performance and burning performance are qualita-tively and quantitatively evaluated. Numerical prediction of NOx emission shows a good agreement with test data at both idle condition and full power condition of LESS combustor. Preliminary results of the flame structure are shown in this paper. The flame stabilization mechanism and NOx reduction effort are also discussed with in-depth analysis.

关键词： air worthiness computational fluid dynamics low emission combustor lean prevaporized and premixed NOx reduction

Endoplasmic reticulum stress and autophagy in cerebral ischemia/reperfusion injury:PERK as a potential target for intervention

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Neural Regeneration Research 2025年第5期20卷 1455-1466页

作者： Ju Zheng Yixin Li Ting Zhang Yanlin fu Peiyan Long Xiao Gao Zhengwei Wang Zhizhong Guan Xiaolan Qi Wei Hong Yan Xiao Key Laboratory of Endemic and Ethnic Diseases Ministry of Education&Key Laboratory of Medical Molecular Biology of Guizhou ProvinceGuizhou Medical UniversityGuiyangGuizhou ProvinceChina Guizhou Center for Disease Control and Prevention GuiyangGuizhou ProvinceChina Department of Histology and Embryology Guizhou Medical UniversityGuiyangGuizhou ProvinceChina Collaborative Innovation Center for Prevention and Control of Endemic and Ethnic Regional Diseases Co-constructed by the Province and Ministry GuiyangGuizhou ProvinceChina

Several studies have shown that activation of unfolded protein response and endoplasmic reticulum(ER)stress plays a crucial role in severe cerebral ischemia/reperfusion *** occurs within hours after cerebral ischemia,but the relationship between ER stress and autophagy remains *** this study,we established experimental models using oxygen-glucose deprivation/reoxygenation in PC12 cells and primary neurons to simulate cerebral ischemia/reperfusion *** found that prolongation of oxygen-glucose deprivation activated the ER stress pathway protein kinase-like endoplasmic reticulum kinase(PERK)/eukaryotic translation initiation factor 2 subunit alpha(e IF2α)-activating transcription factor 4(ATF4)-C/EBP homologous protein(CHOP),increased neuronal apoptosis,and induced ***,inhibition of ER stress using inhibitors or by si RNA knockdown of the PERK gene significantly attenuated excessive autophagy and neuronal apoptosis,indicating an interaction between autophagy and ER stress and suggesting PERK as an essential target for regulating *** autophagy with chloroquine exacerbated ER stress-induced apoptosis,indicating that normal levels of autophagy play a protective role in neuronal injury following cerebral ischemia/reperfusion *** from this study indicate that cerebral ischemia/reperfusion injury can trigger neuronal ER stress and promote autophagy,and suggest that PERK is a possible target for inhibiting excessive autophagy in cerebral ischemia/reperfusion injury.

关键词： apoptosis ATF4 autophagy C/EBP homologous protein cerebral ischemia/reperfusion injury eIF2α endoplasmic reticulum stress PERK

Itraconazole therapy for infant hemangioma:Two case reports

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World Journal of Clinical Cases 2021年第28期9卷 8579-8586页

作者： Zhe Liu Sha Lv shuang Wang Sheng-Ming Qu Gui-Yun Zhang Yi-Tong lin Lei Yang fu-Qiu Li Department of Dermatology The Second Hospital of Jilin UniversityChangchun 130041Jilin ProvinceChina

BACKGROUND Infantile hemangiomas(IHs)are the most common childhood benign tumors,showing distinctive progression characteristics and *** to the high demand for aesthetics among parents of IH babies,early intervention is critical in some cases.β-Adrenergic blockers and corticosteroids are first-line medications for IHs,while itraconazole,an antifungal medicine,has shown positive results in recent *** SUMMARY In the present study,itraconazole was applied to treat two IH *** therapeutic course lasted 80-90 d,during which the visible lesion faded by more than 90%.Moreover,no obvious side effects were reported,and the compliance of the baby and parents was *** Although these outcomes further support itraconazole as an effective therapeutic choice for IHs,large-scale clinical and basic studies are still warranted to improve further treatment.

关键词： Infant Hemangiomas Therapeutics Itraconazole Oral Case report

Effective interactions between two impurities in quasi-two-dimensional dipolar Bose–Einstein condensates

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Communications in Theoretical Physics 2020年第7期72卷 65-70页

作者： fu-lin Deng Tao Shi Su Yi CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100049China

We investigate the effective interaction between two heavy impurities immersed in a quasi-twodimensional dipolar Bose-Einstein condensate via a variation *** show that the mediated interaction is highly tunable via the contact and the dipole-dipole interactions between the background gas ***,the mediated interaction potential may become an oscillating function of inter-impurity distance when roton excitation emerges under sufficiently strong dipolar *** system therefore provides an efficient way for tuning the mediated interaction between impurities.

关键词： dipolar gas impurity effective interaction roton excitation

Preparation mechanism,physical characteristic and antitumor activity of nano-scheelite

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International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 468-474页

作者： lin Cao fu-qiang Yang Jie-xin Cao School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Peking University Health Science Center Beijing 100083 China

After preparing the EU^3＋-doped scheelite nano-material by Pechini method with the nanoparticles of 30-50 nm in diameter, X-ray diffraction （XRD）, transmission electron microscopy （TEM） and high resolution transmission electron microscopy （HRTEM） were used to show a microcosmic description of the particle morphology and crystal structure. The spectrum signature of the nano-scheelite, which was taken by fluorescence spectrometer, was used to discuss the difference of luminescent performance between the nano-scheelite and bulk scheelite. The atomic site of the nano-scheelite was intuitively shown through HRTEM images and HRTEM simulated images from the relation between luminescent properties and crystal structure, which was analyzed by spectrum probe. The results of antitumor activity examined by the 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyltetrazolium bromide （MTT） method show that the inhibition of human promyelocytic leukemia cell line （HL60） is enhanced immediately with increasing the concentration and presents a reliance on the quantity. The results of fluorescence spectra and structure show that the antitumor activity has something to do with micro-structure and surface charge.

关键词： scheelite fluorescence spectrum atomic site anti-tumor activity