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Linear Arboricity of NIC-Planar Graphs

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 924-934页

作者： Bei niu Xin ZHANG School of Mathematics and Statistics Xidian University

A graph is NIC-planar if it admits a drawing in the plane with at most one crossing per edge and such that two pairs of crossing edges share at most one common end vertex. It is proved that every NIC-planar graph with minimum degree at least 2(resp. 3) contains either an edge with degree sum at most 23(resp. 17) or a 2-alternating cycle(resp. 3-alternating quadrilateral). By applying those structural theorems, we confirm the Linear Arboricity Conjecture for NIC-planar graphs with maximum degree at least 14 and determine the linear arboricity of NIC-planar graphs with maximum degree at least 21.

关键词： NIC-planar graph linear arboricity light edge

Triple negative breast cancer: special histological types and emerging therapeutic methods

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Cancer Biology & Medicine 2020年第2期17卷 293-306页

作者： Lu Cao Yun niu Department of Pathology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China Department of Breast Cancer Pathology and Research Laboratory Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China

Triple negative breast cancer(TN BC)is a complex and malignant breast cancer subtype that lacks expression of the estrogen receptor(ER),progesterone receptor(PR)and human epidermal growth factor receptor 2(H ER2),thereby making therapeutic targeting *** is generally considered to have high malignancy and poor ***,patients diagnosed with certain rare histomorphologic subtypes of TNBC have better prognosis than those diagnosed with typical triple negative breast *** addition,with the discovery and development of novel treatment targets such as the androgen receptor(AR),PI3K/AKT/mTOR and AMPK signaling pathways,as well as emerging immunotherapies,the therapeutic options for TNBC are *** this paper,we review the literature on various histological types of TNBC and focus on newly developed therapeutic strategies that target and potentially affect molecular pathways or emerging oncogenes,thus providing a basis for future tailored therapies focused on the mutational aspects of TNBC.

关键词： Triple negative breast cancer pathological subtype androgen receptor immunotherapy targeted therapy

Dynamical behaviors for generalized pendulum type equations with p-Laplacian

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Frontiers of Mathematics in China 2020年第5期15卷 959-984页

作者： Yanmin niu Xiong LI School of Mathematical Sciences Ocean University of ChinaQingdao 266100China Laboratory of Mathematics and Complex Systems(Ministry of Education) School of Mathematical SciencesBeijing Normal UniversityBeijing 100875China

We consider a pendulum type equation with p-Laplacian(φp(x'))'+G'x(t,x)=p(t),where φp(u)=|u|^p-2u,p>1,G(t,x)and p(t)are 1-periodic about every *** solutions of this equation present two interesting *** the one hand,by applying Moser's twist theorem,we find infinitely many invariant tori whenever ∫0^1 p(t)dt=0,which yields the boundedness of all solutions and the existence of quasi-periodic solutions starting at t=0 on the invariant *** the other hand,if p(t)=0 and G'x(t,x)has some specific forms,we find a full symbolic dynamical system made by solutions which oscillate between any two different trivial solutions of the *** chaotic solutions stay close to the trivial solutions in some fixed intervals,according to any prescribed coin-tossing sequence.

关键词： p-Laplacian invariant tori quasi-periodic solutions boundedness complex dynamics

Origin of the Yellow Sea： an insight

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Science Bulletin 2016年第14期61卷 1076-1080页

作者： Yaoling niu Jie Tang Department of Earth Sciences Durham UniversityDurham DH1 3LE UK Institute of Oceanology Chinese Academy of SciencesQingdao 266071 China Qingdao National Laboratory for Marine Science and Technology (Marine Geology) Qingdao 266061 China College of Earth Sciences Jilin University Changchun 130061China

niu et al.[1]recently show that the basement of the Chinese continental shelf(beneath East China Sea and South China Sea)is geologically unrelated to the continental lithosphere of eastern China,but is of exotic origin.

关键词：起源黄海中国东部大陆岩石圈南中国海东中国海中国大陆俯冲板块

High precision nuclear mass predictions towards a hundred kilo-electron-volt accuracy

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Science Bulletin 2018年第12期63卷 759-764页

作者： Zhongming niu Haozhao Liang Baohua Sun Yifei niu Jianyou Guo Jie Meng School of Physics and Materials Science.Anhui University.Hefei 230601.China RIKEN Nishina Center Wako 351-0198Japan School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100191china ELI-NP."Horia Hulubei"National Institute for Physics and Nuclear Engineering R0-077125 Bucharest-MagureleRomania state Key Laboratory of Nuclear Physics and Technology.School of Physics Peking University.Beijing 100871.China Department of Physics University of Stellenbosch.Stellenbosch 7602.South Africa

Mass is a fundamental property and an important fingerprint of atomic *** provides an extremely useful test ground for nuclear models and is crucial to understand energy generation in stars as well as the heavy elements synthesized in stellar *** physicists have been attempting at developing a precise,reliable,and predictive nuclear model that is suitable for the whole nuclear chart,while this still remains a great challenge even in recent *** we employ the Fourier spectral analysis to examine the deviations of nuclear mass predictions to the experimental data and to present a novel way for accurate nuclear mass *** this analysis,we map the mass deviations from the space of nucleon number to its conjugate space of frequency,and are able to pin down the main contributions to the model *** using the radial basis function approach we can further isolate and quantify the *** a pedagogical mass model as an example,we examine explicitly the correlation between nuclear effective interactions and the distributions of mass deviations in the frequency *** method presented in this work,therefore,opens up a new way for improving the nuclear mass predictions towards a hundred kilo-electron-volt accuracy,which is argued to be the chaos-related limit for the nuclear mass predictions.

关键词： Nuclear masses Nuclear effective interactions Fourier analysis Radial basis function approach

CFD Analysis of the Influence of Ionic Liquids on the Performances of a Refrigeration System

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Fluid Dynamics & Materials Processing 2021年第6期17卷 1003-1013页

作者： Jianghao niu Civil Aviation University of China Tianjin300300China

The falling film of an ionic liquid([EMIM][DMP]+H_(2)O)and its effect on a refrigeration system are numerically simulated in the framework of a Volume of Fluid(VOF)method(as available in the ANSYS Fluent computational platform).The properties of the liquid film and the wall shear stress(WSS)are compared with those obtained for a potassium bromide *** working conditions are *** is noted that the ionic liquid demonstrates a better absorption capability,with a coefficient of performance(COP)of *** is proved that the[EMIM][DMP]+H_(2)O ionic liquid working substance is superior to the potassium bromide solution in terms of heat and mass transfer.

关键词： Ionic liquid fluent simulation [EMIM][DMP]+H_(2)O absorption refrigeration system

Oxidation of NiAl-Ag Alloys at 1000℃ in 0.1 MPa O_(2)

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Journal of Materials Science & Technology 2005年第4期21卷 489-492页

作者： Xuejun ZHANG Yah niu State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China Shenyang Institute of Chemical Technology Shenyang 110142 China

Small amounts of silver have been added to the intermetallic compound NiAl with the purpose of improving its mechanical properties. Four ternary NiAl-Ag alloys containing 0.5, 1, 5 and 10 at. pct Ag, denoted as ***,NiAl-1Ag, NiAl-5Ag and NiAl-10Ag, and the Ag-free NiAl have been oxidized at 1000℃ for 24 h in 0.1 MPa O2 to study the effect of the presence of silver on the oxidation behavior of NiAl. All the NiAl-Ag alloys are composed of a matrix of β-NiAl containing a dispersion of isolated particles of a second silver-rich phase. A continuous external layer of Al2O3 formed on all the alloys. In addition, the scales formed on NiAl-5Ag contained a thin and discontinuous layer of pure silver located at the alloy/Al2O3 interface, while those formed on NiAl-10Ag contained isolated particles as well as discontinuous layers of silver at various locations in the scale extending up to the gas/scale interface. The kinetic curves of all the alloys were generally composed of two main parabolic stages with smaller parabolic rate constants for the final stage. The addition of silver does not significantly affect the oxidation behavior of the NiAl intermetallic compound in all cases, as expected because silver is essentially present only as a second phase due to its very small solubility in β-NiAl.

关键词： NiA1-Ag Ternary alloys Oxidation

Multi-collector ICP-MS Analysis of Pb Isotope Ratios in Rocks: Data, Procedure and Caution

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 44-58页

作者： niu Yaoling Department of Earth Sciences Cardiff University Cardiff CF10 3YE UK ACQUIRE The University of Queensland Brisbane Qld 4072 Australia

The authors measured Pb isotope compositions of seven USGS rock referencestandards, i.e. AGV-1, AGV-2, BHVO-1, BHVO-2, BCR-2, BIR-1/1 and W-2, together with NBS 981 using amicromass isoprobe multi-collector inductively-coupled plasma mass spectrometer (MC-ICP-MS) at theUniversity of Queensland. ^(203)Tl-^(205)Tl isotopes were used as an internal standard to correctfor mass-dependant isotopic fractionation. The results for both NBS 981 and USGS rock standardsAGV-1 and BHVO-1 are comparable to or better than double- and triple-spike TIMS (thermal ionizationmass spectrometry) data in precision. The data for BHVO-2 and, to a lesser extent, AGV-2 and BCR-2are reproducibly higher for ^(206)Pb/^(204)Pb, ^(207)Pb/^(204)Pb and ^(208)Pb/^(204)Pb thandouble-spike TIMS data in the literature. The authors also obtained the Pb isotope data for BIR- 1/1and W-2, which may be used as reference values in future studies. It is found that linearcorrection for Pb isotopic fractionation is adequate with the results identical to those correctedfollowing an exponential law or a power law. Precise ^(207)Pb/^(206)Pb, ^(208)Pb/^(206)Pb and^(208)Pb/^(207)Pb ratios can be acquired for sample solutions with Pb>=1 ppb. However, Pb isotoperatios involving ^(204)Pb (i.e., ^(206)Pb/^(204)Pb, ^(207)Pb/^(204)Pb and ^(208)Pb/^(204)Pb) arereliable for solutions with Pb>=40 ppb. The errors for Pb isotope ratio analysis using the MC-ICP-MSare dominated by errors in the analysis of ^(204)Pb, which is commonly ascribed to the difficultyand imprecise correction for a ^(204)Hg isobaric interference. It is found however that the majorerrors on ^(204)Pb come from the tailings of mass ^(203)Tl and mass ^(205)Tl These mass tailingslead to over-subtraction of the baseline for ^(204)Pb, which is measured at +-0.5 amu on both sidesof mass-204 (i.e., at amu 203.5 and 204.5 respectively). Such errors are insignificant for Pb-richsample solutions (i.e., high Pb/Tl ratios), but can be severe for low-Pb sample solutions

关键词： MC-ICP-MS Pb isotope ratios reference materials

Two-dimensional MOS2 for hydrogen evolution reaction catalysis: The electronic structure regulation

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Nano Research 2021年第6期14卷 1985-2002页

作者： Shuwen niu Jinyan Cai Gongming Wang Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry University of Science and Technology of ChinaHefei230026China

Molybdenum disulfide (MoS2) has been recognized as one of the most promising candidates to replace precious Pt for hydrogen evolution reaction (HER) catalysis, due to the natural abundance, low cost, tunable electronic properties, and excellent chemical stability. Although notable processes have been achieved in the past decades, their performance is still far less than that of Pt. Searching effective strategies to boosting their HER performance is still the primary goal. In this review, the recent process of the electronic regulation of MoS2 for HER is summarized, including band structure engineering, electronic state modulation, orbital orientation regulation, interface engineering. Last, the key challenges and opportunities in the development of MoS2-based materials for electrochemical HER are also discussed.

关键词： hydrogen evolution reaction(HER) electronic structure modulation molybdenum disulfide density functional theory phase and interfacial engineering