检索结果-南通市图书馆

Acta Metallurgica sinica(English Letters) 2020年第12期33卷 1666-1680页

作者： u.K.Tarai P.S.Robi Sukhomay pal Department of Mechanical Engineering IIT GuwahatiGuwahati 781039India

A new Ni–Cr–si–b–Fe fi ller material is prepared for transient liquid-phase(TLP)bonding of Inconel 718 superalloy by mechanical alloying *** melting temperature range of the fi ller material and its activation energy of melting are determined by diff erential scanning calorimetry *** activation energy and melting temperature of the alloy powder decrease with increasing milling *** 718 alloy was joined via TLP by using the newly developed fi ller *** eff ect of TLP bonding temperature and time on microstructural evolution and mechanical properties of the joint was *** distinct microstructural regions were observed in the bonding area:isothermal solidifi cation zone consisting of a single-phase solid solution,diff usion aff ected zone consisting of extensive diff usion-induced precipitates of metallic boride,and unaff ected base *** ultimate shear strength and microhardness of the TLP-bonded joint increase with bonding time and temperature.

关键词： Transient liquid-phase(TLP)bonding Kissinger plot Mechanical alloying Inconel 718

Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Jing-Wen Xie Meng-Ting Wang Yan Jin si Li Jian-Hua Qin Shuang-Quan Zang Tomas C.W.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （CPL） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for CPL materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,L/*** L/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and CPL activity with a maximum glumup to 2.0×10-3,which shows potential applications in the WLED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

关键词：

A STuDY ON THE ESTIMATION OF TEMPERATuRE STRuCTuRE PARAMETER IN AbL WITH ELEVATED INVERsiON

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta meteorologica sinica 1995年第3期9卷 349-359页

作者： b.Roy u.K.De b.pal Physics Department Jadavpur University.Calcutta 700 032.India Department of Physics and Meteorology Indian Institute of TechnologyKharagpur 721 302India

Temperature structure parameter in the vertical is estimated once by using the turbulence outer scale approximation and another by using the Obukhov similarity relationship during the formation of an elevated inversion.A comparison of the profiles drawn using both the methods is done for the pur- pose of assessing the accuracy of the similarity method when applied to levels above the surface-based *** profiles obtained by both the methods are also compared with a similar profile obtained af- ter considering a bulk shear between the ground and top of the elevated layer.

关键词： kytoon Doppler sodar temperature structure parameter Obukhov similarity method elevated inversion

Distinct MLT asymmetry of auroral kilometric radiation observed by the FAST satellite

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2025年第1期9卷 188-193页

作者： JiaWen Tang Sai Zhang FuLiang Xiao HongMing Yang si Liu YiHua He Chang Yang YuYue Jin ZhouKun Deng Ping Li Archie James Johnston School of Physics and Electronic Sciences Changsha University of Science and TechnologyChangsha 410114China Hunan Province Higher Education Key Laboratory of Modeling and Monitoring on the Near-Earth Electromagnetic Environments Changsha University of Science and TechnologyChangsha 410114China School of Electrical and Information Engineering Changsha University of Science and TechnologyChangsha 410114China

Auroral Kilometric Radiation (AKR) is a common radio emission,which can contribute to the magnetosphere-ionosphereatmosphere co u *** emissions have been observed in all magnetic planet magnetospheres of the solar *** this study,using observations from the FAST satellite from 30 August 1996 to 9 September 2001,the distribution of AKR in altitude=500-4500 km and invariant latitude (|ILAT|)=60°-80°has been analyzed.63045 AKR samples have been identified with~48%(52%) samples on the dayside (nightside).Of considerable interest,there is a distinct MLT asymmetry with the high occurrence rate in MLT=05-08 and 18-22(02-05 and 12-17) in the northern (southern) *** distinct MLT asymmetry is associated with the direction of bxof the interplaneta ry magnetic *** addition,the occurrence rate on the nightside clearly increases as the AE^(*) index *** study further enriches the information and understanding of AKR in the magnetosphere as well as other similar radio emissions.

关键词： asymmetry auroral kilometric radiation interplanetary magnetic field

Spectrally resolved Hong-Ou-Mandel interferometry for quantum-optical coherence tomography

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2020年第6期8卷 1023-1034页

作者： PAbLO YEPIZ-GRACIANO ALI MICHEL ANGuLO MARTINEZ DORILIAN LOPEZ-MAGO HECTOR CRuZ-RAMIREZ ALFRED b.u'REN Instituto de Ciencias Nucleares Universidad Naciona/Autonoma de MexicoApdo.Postal 70-543Ciudad de Mexico 04510Mexico Tecnologico de Monterrey Escuela de Ingenieria y CienciasAve.Eugenio Garza Sada 2501MonterreyN.L.64849Mexico

In this paper,we revisit the well-known Hong_Ou-Mandel(HOM)effect in which two photons,which meet at a beamsplitter,can interfere destructively,leading to null in coincidence *** a standard HOM measurement,the coincidence counts across the two output ports of the beamsplitter are monitored as the temporal delay be-tween the two photons prior to the beamsplitter is varied,resulting in the well-known HOM *** show,both theoretically and experimentally,that by leaving the delay fixed at a particular value while relying on spectrally resolved coincidence photon counting,we can reconstruct the HOM dip,which would have been obtained through a standard delay-scanning,non-spectrally resolved HOM *** show that our numerical reconstruction procedure exhibits a novel dispersion cancellation effect,to all *** discuss how our present work can lead to a drastic reduction in the time required to acquire a HOM interferogram,and specifically discuss how this could be of particular importance for the implementation of fficient quantum optical coherence tomog-raphy devices.

关键词： resolved coincidence quantum

Effects of Different Combinations of Two Spices:Clove and Nutmeg Seed Extracts on Antioxidants Levels in African Catfish(Clarias gariepinus)

在线全文

学校读者我要写书评

暂无评论

Journal of Fisheries Science 2021年第2期3卷 36-44页

作者： Akinrotimi O.A Okenwa u Stephen M.u Eze b.u Onwujiariri C.E African Regional Aquaculture Center/Nigerian Institute for Oceanography and Marine Research AluuPort HarcourtRivers StateNigeria Department of Fisheries and Aquatic Environment Faculty of AgricultureRivers State UniversityNkpoluOroworukwoPortharcourtRivers StateNigeria

The effect of different combinations of botanical spices such as clove and nutmeg in different proportion on the antioxidants activities which include lipid peroxidation(LPO),superoxide dismutase(SOD),catalase(CAT),glutathione-S-transferase(GST)and glutathione peroxide(GPX)in juveniles and adults sizes of Clarias gariepinus was investigated using different combinations of clove(C),and nutmeg(C.N 0:0-Control 0%of Clove and Nutmeg;C.N 1:3-25%Clove and 75%Nutmeg;C.N 3:1-75%Clove and 25%Nutmeg;C.N 2:2-50%Clove and 50%Nutmeg;C.4-100%Clove;N4-100%)in *** results from the study indicated that the anaesthetic caused a substantial(punder *** highest deviations in the studied antioxidants were observed in the fish exposed to C4 combination of the anaesthetics and the lowest in the *** results from this work therefore suggest that the anaesthetics can alter antioxidants levels in the fish which was more noticeable in the fish exposed to C.N 3:1-75%Clove and 25%Nutmeg;C.N 2:2-50%Clove and 50%Nutmeg;C.4-100%Clove;N4-100%.Hence fish farmers and scientists are advised to take caution when combining these plant extracts for use in aquaculture.

关键词： Spices Nutmeg Clove Anaesthetics Fish Antioxidants

Experimental demonstration of full-field quantum optical coherence tomography

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2020年第1期8卷 51-56页

作者： ZEFERINO IbARRA-bORJA CARLOS SEVILLA-GuTIéRREZ RObERTO RAMíREZ-ALARCóN HECTOR CRuZ-RAMíREZ ALFRED b.u'REN Centro de Investigaciones en Optica A.C. Lomadel Bosque 115Colonia Lomas del Campestre37150 LeonGuanajuatoMexico 2lnstituto de Ciencias NuclearesUniversidad Nacional Autonomade MexicoApartado Postal 70-54304510 DFMexico

We present,to the best of our knowledge,the first implementation of full-field quantum optical coherence tomography(FF-QOCT).In our system,we are able to obtain full three-dimensional(3D)information ab.ut the internal structure of a sample under study by relying on transversely resolved Hong–Ou–Mandel(HOM)interferometry with the help of an intensified CCD(ICCD)*** system requires a single axial scan,obtaining full-field transverse single-photon intensity in coincidence with the detection of the sibling photon for each value of the signal-idler temporal *** believe that this capability constitutes a significant step forward toward the implementation of QOCT as a practical biomedical imaging technique.

关键词： technique. quantum system

Hsa-miR-214-3p inhibits breast cancer cell growth and improves the tumor immune microenvironment by downregulating b7H3

在线全文

学校读者我要写书评

暂无评论

Oncology research 2025年第1期33卷 103-121页

作者： Yan Lu Kang Wang Yuanhong Peng Meng Chen Lin Zhong Luji Huang F u Cheng Xindan Sheng Xin Yang Manzhao Ouyang George A Calin Zhiwei He China-America Cancer Research Institute Guangdong Medical University Dongguan 523808 China. GCP Center Shunde Hospital Southern Medical University (The First People's Hospital of Shunde Foshan) Shunde 528300 China. Department of Gastrointestinal Surgery Shunde Hospital Southern Medical University (The First People's Hospital of Shunde Foshan) Shunde 528300 China. The Second School of Clinical Medicine Southern Medical University Guangzhou 510080 China. Department of Translational Molecular Pathology The University of Texas MD Anderson Cancer Center Houston TX 77030 USA. Department of Oncology Shunde Hospital Southern Medical University (The First People's Hospital of Shunde Foshan) Shunde 528300 China.

background:Immune checkpoint inhibitors play an important role in the treatment of solid tumors, but the currently used immune checkpoint inhibitors targeting programmed cell death-1 (PD-1), programmed cell death ligand-1 (PD-L1), and cytotoxic T-lymphocyte antigen-4 (CTLA-4) show limited clinical efficacy in many breast cancers. b7H3 has been widely reported as an immunosuppressive molecule, but its immunological function in breast cancer patients remains unclear.Methods:We analyzed the expression of b7H3 in breast cancer samples using data from the Cancer Genome Atlas Program (TCGA) and the Gene Expression Omnibus (GEO) databases. MicroRNAs were selected using the Tarbase, miRTarbase, and miRbase databases. The regulatory role of the microRNA hsa-miR-214-3p on b7H3 was investigated through dual-luciferase reporter assays, which identified the specific action sites of interaction. The expression levels of b7H3 and hsa-miR-214-3p in human breast cancer tissues and adjacent normal tissues were quantified using Western blotting and quantitative PCR (qPCR). experiments were performed to observe the effects of modulating the expression of b7H3 or hsa-miR-214-3p on breast cancer cell proliferation and apoptosis. Additionally, the regulatory impact of hsa-miR-214-3p on b7H3 was examined. Enzyme-linked immunosorbent assays (ELISA) and flow cytometry were employed to assess the effects of co-cultured breast cancer cells and normal human peripheral blood mononuclear cells (PbMCs) on immune cells and associated cytokines.Results:In breast cancer tissues, the expression level of b7H3 is inversely correlated with that of hsa-miR-214-3p, as well as with the regulatory effects on breast cancercell behavior. Hsa-miR-214-3p was found to inhibit breast cancer cell growth by downregulating b7H3. Importantly, our research identified, for the first time, two binding sites for hsa-miR-214-3p on the 3' uTR of b7H3, both of which exert similar effects independently. Co-culture experime

关键词： b7H3 breast cancer Hsa-miR-214-3p Immunotherapy

Analysis of Power in an Argon Filled Pulsed Dielectric barrier Discharge

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2013年第7期15卷 635-639页

作者： u.N.pal Pooja GuLATI Ram PRAKASH Mahesh KuMAR V.SRIVASTAVA S.KONAR Microwave Tubes Division CSIR-Central Electronics Engineering Research Institute (CSIR-CEERI)Pilani Rajasthan-333031 India birla Institute of Technology (bIT) Mesra Ranchi Jharkhand-835215 India

In this paper an argon filled coaxial dielectric barrier discharge （DbD） has been studied to understand the detail of power transfer from a unipolar square pulse to plasma during discharge. A dielectric barrier discharge based diffuse pulse discharge and its electrical charac-teristics are investigated. A quartz coaxial DbD tube filled at different pressures is used in the experiment. A unipolar pulse voltage of different peak voltages and frequencies has been applied to the discharge electrodes for the generation of microdischarges. Two current pulses are used for two consecutive discharges per applied voltage pulse. The second discharge, which occurs at the falling flank of the voltage pulse, is induced by the charges stored on the dielectric barrier during the first discharge. It has been deduced that the power supplied to ignite the first discharge is partly stored to ignite the second discharge when the applied voltage decays. This process ul- timately leads to much improved power transfer to the plasma. The knowledge obtained from dynamic processes of the DbDs in the discharge gap explains quantitatively the mechanism of ignition, development and extinction of the DbDs.

关键词： DbD non-equilibrium plasma non-thermal plasma diffuse pulse discharge,microdischarges

Effects of slag fineness on durability of mortars

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang university-Science A(Applied Physics & Engineering) 2007年第11期8卷 1725-1730页

作者： TOPu lker bekir bLR Turhan Department of Civil Engineering Eski■ehir Osmangazi university Eski■ehir 26480 Turkey

In recent years, the usages of by-products and wastes in industry have become more important. The importance of the sustainable development is also of increasing. The utilizations of wastes, as mineral admixture or fine aggregate, reduce the consumption of the natural resources and improve the durability of concrete. In this study, the effect of the fineness on the high temperature and sulphate resistances of concrete mortar specimens, produced with ground granulated blast-furnace slag (GbFS) replacing cement, is investigated. The compressive and flexural strength test results for all series related to durability effects, exposing temperature and solutions, exposure times for these durability effects, slag content and fineness are discussed. Conse- quently, the optimum slag contents are determined for producing the sulphate and high temperature resistant mortars.

关键词： Cement Fineness Ground slag High temperature effect Sulphate attack Sustainable development