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Structural,electronic,and magnetic properties of vanadium atom-adsorbed MoSe2 monolayer

Chinese Physics B 2017年第2期26卷 392-398页

作者： Ping Llu zhen-zhen qin Yun-liang Yue Xu Zuo College of Electronic Information and Optical Engineering Nankai University Tianjin 300071 China

Using the first-principles calculations, we study the structural, electronic, and magnetic properties of vanadium adsorbed MoSe_2 monolayer, and the magnetic couplings between the V adatoms at different adsorption concentrations. The calculations show that the V atom is chemically adsorbed on the MoSe_2 monolayer and prefers the location on the top of an Mo atom surrounded by three nearest-neighbor Se atoms. The interatomic electron transfer from the V to the nearestneighbor Se results in the polarized covalent bond with weak covalency, associated with the hybridizations of V with Se and Mo. The V adatom induces local impurity states in the middle of the band gap of pristine MoSe_2, and the peak of density of states right below the Fermi energy is associated with the V- dz^2 orbital. A single V adatom induces a magnetic moment of 5 μBthat mainly distributes on the V-3d and Mo-4d orbitals. The V adatom is in high-spin state, and its local magnetic moment is associated with the mid-gap impurity states that are mainly from the V-3d orbitals. In addition,the crystal field squashes a part of the V-4s electrons into the V-3d orbitals, which enhances the local magnetic *** magnetic ground states at different adsorption concentrations are calculated by generalized gradient approximations（GGA） and GGA＋U with enhanced electron localization. In addition, the exchange integrals between the nearest-neighbor V adatoms at different adsorption concentrations are calculated by fitting the first-principle total energies of ferromagnetic（FM） and antiferromagnetic（AFM） states to the Heisenberg model. The calculations with GGA show that there is a transition from ferromagnetic to antiferromagnetic ground state with increasing the distance between the V adatoms. We propose an exchange mechanism based on the on-site exchange on Mo and the hybridization between Mo and V, to explain the strong ferromagnetic coupling at a short distance between the V adatoms. However, the ferromagneti

关键词： V-adatom MoSe2 monolayer magnetic moment magnetic coupling first-principles calculation

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激电法在弥渡宝兴厂矿区的应用效果

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云南地质 2011年第2期30卷 174-178页

作者：王绍明蔺冰玉李振钦涂国府余飞燕武警黄金第十支队云南昆明650111 中国有色金地有限公司北京100025

宝兴厂矿区是与喜马拉雅期富碱斑岩有关的多金属成矿集中区,地层、斑岩体、矿化体具有明显的物性差异,有利于开展激电测量,圈定多个物探异常,工程验证发现多金属矿化体。

关键词：多金属矿化体 10异常发现三类高充电异常岩体与围岩构造带云南弥渡宝兴厂

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Zr_(55)Al_(10)Ni_(5)Cu_(30)amorphous alloy film prepared by magnetron sputtering method

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Rare Metals 2021年第8期40卷 2237-2243页

作者： Dong-Mei Mi Sheng-li Zhu Yan-qin liang Zhao-Yang li zhen-Duo Cui Xian-Jin Yang Akihisa Inoue School of Materials Science and Engineering Tianjin UniversityTianjin300072China Tianjin Key Laboratory of Composite and Functional Materials Tianjin300072China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin300072China Department of Physics Kings Abudulaziz UniversityJeddah22254Saudi Arabia

In this work,amorphous Zr_(55)Al_(10)Ni_(5)Cu_(30)alloy thin film was prepared on D36 steel substrate by magnetron sputtering *** film was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),atomic force microscopy(AFM),hardness tester and nano *** behavior of the film was investigated in 3.5%NaCl aqueous solutions by an electrochemical *** room temperature,the amorphous alloy film was formed completely after sputtering for 5 *** surface morphology of the amorphous alloy film was uniform and *** of the amorphous alloy film improved the microhardness and corrosion resistance of the D36 *** amorphous alloy film(prepared at room temperature for 5 h)exhibited good adhesion strength with the *** as-sputtered sample exhibited a crevice corrosion trend when the sputtering time was too short(1 h)or too long(10 h).

关键词： Magnetron sputtering Amorphous alloy Thin film Corrosion resistance Zr_(55)Al_(10)Ni_(5)Cu_(30)

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Fe-based metallic glass as heterogeneous Fenton-like catalyst for azo dyes degradation:effect of inorganic anions

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Rare Metals 2023年第10期42卷 3443-3454页

作者： Ming-Jie Zhou Wen-Tao Zhang Zhun li Tao Feng Si Lan zhen Peng Shuang-qin Chen Herbert Gleiter Institute of Nanoscience School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094China Shenzhen YNTECH Co. LtdShenzhen518118China School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China

Metallic glasses(MGs) are promising heterogeneous catalysts in water remediation,due to their superior efficiency,selectivity,reusability and corrosion ***,few works are focused on the influence of inorganic anions that are abundant in ***,four common inorganic anions were added in a heterogeneous Fenton-like system(Fe-MG/H_(2)O_(2)) to study inorganic anions' influence on MGs' catalytic performance during methylene blue(MB) *** demonstrated that chloride ions and dihydrogen phosphate ions had an adverse effect on the catalytic performance of Fe-MG,whereas Fe-MG/H_(2)O_(2) system sustained high efficiency in the presence of sulfate ions and nitrate ions during the Fenton-like *** studying the structure,surface morphology,and evolution of active species,it was found that inorganic anions had a significant effect on the surface morphology of Fe-MG and the generation of active *** work will provide essential references for MGs as heterogeneous catalysts in practical applications.

关键词： Fe-based metallic glass(Fe–MG) Inorganic anion Wastewater treatment Methylene blue(MB)

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Nature's disguise:Empirical demonstration of dead-leaf masquerade in Kallima butterflies

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Zoological Research 2024年第6期45卷 1201-1208页

作者： Zeng-Tao Zhang Long Yu Hai-zhen Chang Shi-Chang Zhang Dai-qin li State Key Laboratory of Biocatalysis and Enzyme Engineering and Centre for Behavioural Ecology&EvolutionSchool of Life SciencesHubei UniversityWuhanHubei 430062China Wuhan Wuluolu Experimental Junior High School WuhanHubei 430070China Department of Biological Sciences National University of SingaporeSingapore 117543Singapore

Animals deploy diverse color-based defenses against predators,including crypsis,mimicry,aposematism,and *** crypsis,mimicry,aposematism have been extensively studied,the strategy of masquerade-where organisms imitate inedible or inanimate objects such as leaves,twigs,stones,and bird droppings-remains comparatively underexplored,particularly in adult *** Indian oakleaf butterfly(Kallima inachus)exemplifies this phenomenon,with its wings resembling dead leaves,providing a classic example of natural *** it has long been postulated that these butterflies evade predation by being misidentified as dead leaves,direct experimental evidence is *** the current study,using domestic chicks as predators,we manipulated their prior experience with dead leaves(model objects)while maintaining constant exposure to butterflies to test whether dead-leaf masquerade provides a protective advantage by preventing *** showed a marked delay in the initiation of attacks by chicks familiar with dead leaves compared to those with no prior exposure or those exposed to visually altered *** with prior dead-leaf experience required a similar amount of time to attack the butterflies as they did to attack dead *** findings provide the first empirical demonstration of dead-leaf masquerade in Kallima butterflies,shedding light on its evolutionary *** study highlights the effectiveness of masquerade in inducing the misclassification of butterflies as inanimate objects,showcasing the precise mimicry achieved by these organisms when viewed in isolation from the model *** study advances our understanding of the evolution of masquerade and its role as a potent antipredator strategy in nature.

关键词： Antipredator defense Camouflage Deadleaf butterfly Masquerade Natural selection Visual recognition

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Synthesis and Characterization of Titanosilicate with the Structure of Umbite

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Chemical Research in Chinese Universities 2002年第4期18卷 380-384页

作者： ZHAO Yong-nan li Ya-feng ZOU Yong-chun MAI zhen-hong PANG Wen-qin Institute of Physics&Center for Condensed Matter Physics Chinese Academy of SciencesBeijing 100080P.R.China Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jinlin UniversityChangchun 130023P.R.China

A zeolitic titanosilicate with the composition of K_2TiSi_3O_9·H_2O, a structural analogue of natural mineral umbite K_2ZrSi_3O_9·H_2O, was hydrothermally synthesized in the SiO_2-TiO_2-K_2O-H_2O system and characterized by means of powder X-ray diffraction, SEM, IR and thermal analysis. The effects of TiO_2/SiO_2 and OH -/SiO_2 ratios on the crystallization of the umbite were discussed. The influence of the organic additives on the morphology of the crystal was also investigated and the crystals with different shapes were obtained.

关键词： Synthesis Titanosilicate Umbite

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弹药集装化运输保障探讨

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军事交通学院学报 2009年第2期11卷 22-25页

作者：翟俊伟田润良李勤真曹继霞米斌斌军事交通学院汽车指挥系天津300161 军事交通学院研究生管理大队天津300161

我军弹药运输保障多采用人工装卸、武装押运的形式,保障效率较低。通过对比分析我军与外军,特别是美军的弹药集装化运输现状,阐述了弹药集装化运输的优越性,为保证弹药快速、安全、高效运输,最后提出了弹药集装化运输的构想。

关键词：弹药运输集装化安全快速高效保障

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Age and geochemistry of Early Ordovician A-type granites in the Northeastern Songnen Block,NE China

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Acta Geochimica 2018年第6期37卷 805-819页

作者： Changzhou Deng Deyou Sun Guangyi Sun Changlu Lv zhen qin Xianquan Ping Guanghui li College of Earth Sciences Jilin UniversityChangchun130061China Heilongjiang Institute of Geological Survey Harbin150036China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang550081China Faculty of Earth Sciences China University of GeosciencesWuhan430074China

Early Ordovician A-type granites in the northeastern(NE) Songnen Block NE China were studied to better understand the geodynamic settings in this *** research presents new zircon U–Pb ages and wholerock geochemical data for the Early Ordovician granites in the NE Songnen Block. Zircon U–Pb dating indicates that the granite in the Cuibei, Hongxing, and Meixi areas in the NE Songnen Block formed in the Early Ordovician with ages of 471–479 Ma. The granites show geochemical characteristics of high SiO2 and K2 O compositions and low FeOT, MgO, CaO, and P2 O5 compositions. They belong to a high K calc-alkaline series and display a weak peraluminous featurPe with A/CNK values of 0.98–1.14. The rocks have aREE composition of 249.98–423.94 ppm,and are enriched in LREE with(La/Yb)Nvalues of2.87–9.87, and display obvious Eu anomalies(d Eu =0.01–0.29). Trace elements of the studied granites are characterized by enrichment in Rb, Th, U, Pb, Hf, and Sm,and depletion of Ba, Nb, Ta, and Sr. They display geochemical features of high Zr +Y + Nb+Ce values(324–795 ppm) and Ga/Al ratios consistent with A-type granites. Based on particular geochemical features, such as high Rb/Nb(7.98–24.19) and Y/Nb(1.07–3.43), the studied A-type granites can be further classified as an A2-type subgroup. This research indicates that the Early Ordovician A-type granites were formed by the partial melting of ancient crust in an extensional setting. Lower Sr/Y and(Ho/Yb)Nratios indicate that plagioclase and amphibole are residual in the source, and garnet is absent, implying that the magma was generated at low levels of pressure. By contrast, the contemporaneous granites in the SE Xing'an Block suggest a subduction-related tectonic setting, and its adakitic property indicates a thickened continental *** suggest that the Paleo-Asian Ocean plate between the Xing'an and Songnen blocks subducted northward during the Early Ordovician. Meanwhile, the NE Songnen Block was exposed to a passive contin

关键词： Early Ordovician A-type granite Songnen and Xing’an blocks Geodynamic setting

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Diagnostic Efficacy of^(18)F-FDG PET/CT in Detecting Bone Marrow Infiltration in Patients with Newly Diagnosed Diffuse Large B-Cell Lymphoma

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Biomedical and Environmental Sciences 2023年第6期36卷 510-516页

作者： GUO Bo qin Ran GU zhen Yang li Yan Fen GAO Lei HUANG Wen Rong Department of Hematology The Second Medical Center&National Clinical Research Center for Geriatric DiseasesChinese PLA General HospitalBeijing 100853China Department of Hematology The Fifth Medical CenterChinese PLA General HospitalBeijing 100071China Department of Medical Engineering Medical Supplies Center of PLA General HospitalBeijing 100039China

Objective Diffuse large B-cell lymphoma(DLBCL)is often associated with bone marrow infiltration,and 2-deoxy-2-(18F)fluorodeoxyglucose positron emission tomography/computed tomography(^(18)F-FDG PET/CT)has potential diagnostic significance for bone marrow infiltration in *** A total of 102 patients diagnosed with DLBCL between September 2019 and August 2022 were *** marrow biopsy and^(18)F-FDG PET/CT examinations were performed at the time of initial *** tests were used to evaluate the agreement of^(18)F-FDG PET/CT with the gold standard,and the imaging features of DLBCL bone marrow infiltration on PET/CT were *** The total detection rate of bone marrow infiltration was not significantly different between PET/CT and primary bone marrow biopsy(P=0.302)or between the two bone marrow biopsies(P=0.826).The sensitivity,specificity,and Youden index of PET/CT for the diagnosis of DLBCL bone marrow infiltration were 0.923(95%CI,0.759-0.979),0.934(95%CI,0.855-0.972),and 0.857,***^(18)F-FDG PET/CT has a comparable efficiency in the diagnosis of DLBCL bone marrow ***/CT-guided bone marrow biopsy can reduce the misdiagnosis of DLBCL bone marrow infiltration.

关键词： Diffuse large B-cell lymphoma Bone marrow infiltration Positron emission computed tomography(PET/CT) Bone marrow biopsy Diagnostic efficacy

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Quasi-periodic Oscillation Analysis for the BL Lacertae Object 1823+568

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Research in Astronomy and Astrophysics 2022年第5期22卷 158-164页

作者： Huai-zhen li Quan-Gui Gao Long-Hua qin Ting-Feng Yi Qi-Rui Chen Physics Department Yuxi Normal UniversityYuxi 653100China Department of Physics Yunnan Normal UniversityKunming 650092China

We studied the optical band periodic variability of 1823+568 using the Jurkevich method,the Lomb-Scargle periodogram and the REDFIT38 software,and found evidence of quasi-periodic *** unprecedented variability with period P=283^(+17)_(-13) days was identified by three different analysis *** quasi-periodic variability most likely results from nonballistic helical jet motion driven by the orbital motion in a binary black hole *** the light-travel time effect,the real physical period is P_(d)=67.1 ***,we estimated that the primary black hole mass is M■1.92×10^(9) M_(⊙)to 3.43×10^(9) M_(⊙).

关键词： blazars(1823+568)-relativisticjets-non-thermalsources

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