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Nanocavity-Mediated Fast Magnetic Vortex Core In-Situ Switching by Local Magnetic Field

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Chinese Physics Letters 2021年第12期38卷 76-79页

作者： Xiao-Ping Ma hongguo yang Changfeng Li Cheng Song Hong-Guang Piao Hubei Engineering Research Center of Weak Magnetic-Field Detection College of ScienceChina Three Gorges UniversityYichang 443002China Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Fast in situ switching of magnetic vortex core in a ferromagnetic nanodisk assisted by a nanocavity,with diameter comparable to the dimension of a vortex core,is systematically investigated by changing the strength as well as the diameter of the effective circular region of the applied magnetic *** applying a local magnetic field within a small area at the nanodisk center,fast switching time of about 35 ps is achieved with relatively low field strength(70 mT)which is beneficial for fast data reading and *** reason for this phenomenon is that the magnetic spins around the nanocavity is aligned along the cavity wall due to the shape anisotropy when the perpendicular field is applied,which deepens the dip around the vortex core,and thus facilitates the vortex core switching.

关键词： strength cavity vortex

Expression and clinical significance of MN1 and PTEN gene in patients with acute myeloid leukemia

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The Chinese-German Journal of Clinical Oncology 2011年第4期10卷 232-234页

作者： Xueshen Yan Fanjun Meng hongguo Zhao Jie yang Affiliated Hospital of Medical College Qingdao University Qingdao 266003 China

Objective:The aim of our study was to explore the correlations between both the genes,evolution and prognosis of the disease by detecting the expression of MN1(meningioma 1) gene and PTEN(phosphatase and tensin homolog) gene in patients with acute myeloid leukemia(AML).Method:MN1 and PTEN mRNA were detected by reverse transcription-PCR in mononuclear cells of 38 patients with AML and 13 patients with normal bone ***:Positive rates of MN1 and PTEN genes were 76.3% and 60.5% respectively in bone marrow mononuclear *** expression level of MN1 mRNA for the de novo group increased comparing with that for normal control group(P < 0.05),the expression level of PTEN mRNA for de novo group decreased obviously comparing with that for normal control group(P < 0.01),MN1 mRNA level decreased in remission group,while PTEN mRNA level increased comparing with that in de novo group(P < 0.05).MN1 mRNA level increased and PTEN mRNA decreased in relapsed group comparing with that in control group,and their difference was statistical significance(P < 0.05).The two genes' levels had negative correlations in acute myeloid leukemia(r =-0.314,P < 0.05).Conclusion:There is close correlations between expression of MN1 and PTEN genes and the prognosis and occurrence of acute myeloid leukemia,and their expression can be taken as significant indexes to access the de novo,relapse and prognosis of acute myeloid leukemia.

关键词： AML MN1 gene PTEN gene

Coercivity mechanism of high-performance anisotropic heterostructure SmCo5 magnets

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Journal of Rare Earths 2024年第10期42卷 1882-1888页

作者： Yuan Teng Yuqing Li Weiqiang Liu Xiaochang Xu Zhanjia Wang Jianjun yang Dongtao Zhang hongguo Zhang Qingmei Lu Qiong Wu Weixing Xia Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of Technology School of Mechanical and Electrical Engineering Henan Institute of Science and Technology School of Mechanical Engineering Anyang Institute of Technology Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences

Due to its large magnetocrystalline anisotropy field and high Curie temperature,SmCo-based magnets are irreplaceable in high-temperature applications,The hot-deformed SmCo-based magnets are especially attractive for their excellent corrosion resistance,making them more suitable for harsh ***,it is still challenging for hot-deformed SmCo-based magnets to obtain high magnetization and high coercivity ***,it is necessary to analyze the relationship between its microstructure and magnetic properties and explore its magnetic hardening mechanism to guide the further improvement of magnetic *** this paper,the anisotropic heterostructure SmCo5magnet was prepared by combining large height-reduction and introducing a nano-grained Smrich *** c-axis texture,（BH）m of 16.1 MGOe,and Hciof 9.6 kOe were obtained via the heterostructure with SmCo5micron-grain and Sm-rich nano-scale *** magnetic domain observation and technical magnetization analysis demonstrate that the coe rcivity mechanism is dominated by *** results also show that the smooth and Sm-rich precipitated grain boundary provides weak pinning *** provides a reference for the development of high-pe rformance nanocrystalline SmCo5magnets.

关键词： Coercivity mechanism Heterostructure Hot-deformed SmCo magnet Permanent magnet Rare earths

Synthesis of size-controlled and dispersible Sm2Fe17N3 magnetic particles by reduction diffusion process using molten salt

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Journal of Rare Earths 2024年第11期42卷 2105-2111页

作者： Junhua Xi Zhi yang Muhammad Haseeb Yuanyuan Chen Xiaofeng Nie Liying Cong Qiong Wu Enfeng Fu hongguo Zhang Weiqiang Liu Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of Technology

The synthesis of size-controlled Sm2Fe17magnetic particles is a prerequisite for the fabrication of highperformance Sm2Fe17N3permanent magnetic ***,Sm2Fe17was synthesized using a costeffective reduction-diffusion *** calcium chloride molten salt was introduced to control the particle size and achieve a single phase of *** effects of reduction-diffusion reaction temperature and the amount of added calcium chloride on the phase constitution and microstructure of the final product of reduction-diffusion were systematically *** an appropriate amount of calcium chloride can effectively inhibit the overgrowth and sintering of the reduced *** employing the strategy of adding 20 wt% of calcium chlorides into the green compacts,we were able to successfully synthesize uniform Sm2Fe17particles that are well-dispersed,with an average size of 2.2 μ***,by combining the optimal reduction-diffusion conditions and the nitriding process,the hard magnetic Sm2Fe17N3material was successfully *** study could be useful for the development of high-performance Sm2Fe17N3magnetic materials utilizing reduction-diffusion technology.

关键词： Molten salt Permanent magnets Rare earths Reduction-diffusion Sm2Fe17N3

Synergy of heterogeneous Co/Ni dual atoms enabling selective C-O bond scission of lignin coupling with in-situ N-functionalization

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Journal of Energy Chemistry 2024年第5期92卷 16-25页

作者： Baoyu Wang Jinshu Huang hongguo Wu Ximing Yan Yuhe Liao Hu Li National Key Laboratory of Green Pesticide Key Laboratory of Green Pesticide&Agricultural BioengineeringMinistry of EducationState-Local Joint Laboratory for Comprehensive Utilization of BiomassCollege of Pharmacy&Center for R&D of Fine ChemicalsGuizhou UniversityGuiyang 550025GuizhouChina Guangxi Key Laboratory of Green Chemical Materials and Safety Technology Beibu Gulf UniversityQinzhou 535011GuangxiChina Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640GuangdongChina

Selective cleavage of Csp^(2)-OCH_(3)bond in lignin without breaking other types of C-O bonds followed by N-functionalization is fascinating for on-purpose valorization of ***,a Co/Ni-based dual-atom catalyst CoNiDA@NC prepared by in-situ evaporation and acid-etching of metal species from tailor-made metal–organic frameworks was efficient for reductive upgrading of various lignin-derived phenols to cyclohexanols(88.5%–99.9%yields),which had ca.4 times higher reaction rate than the single-atom catalyst and was superior to state-of-the-art heterogeneous *** synergistic catalysis of Co/Ni dual atoms facilitated both hydrogen dissociation and hydrogenolysis steps,and could optimize adsorption configuration of lignin-derived methoxylated phenols to further favor the Csp^(2)-OCH_(3)cleavage,as elaborated by theoretical ***,the CoNi_(DA)@NC catalyst was highly recyclable,and exhibited excellent demethoxylation performance(77.1%yield)in real lignin monomer *** in-situ cascade conversion processes assisted by dual-atom catalysis,various high-value N-containing chemicals,including caprolactams and cyclohexylamines,could be produced from lignin.

关键词： Biomass conversion Heterogeneous catalysis Lignin Dual-atom catalyst Selective C-ocleavage

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宽幅经编机温度控制方法研究

针织工业 2021年第12期 6-8页

作者：杨宏国常德纺织机械有限公司湖南常德415004

针对特里科经编机停机后再次开机时出现的擦针现象,以E2528/3A-268型经编机为例,介绍一种特里科经编机的新型温度控制系统。该系统采用双温双控、动态监测、实时跟踪,从而保障机器油温和床身温度的合理性;最大程度控制床身的伸缩,保证... 详细信息

针对特里科经编机停机后再次开机时出现的擦针现象,以E2528/3A-268型经编机为例,介绍一种特里科经编机的新型温度控制系统。该系统采用双温双控、动态监测、实时跟踪,从而保障机器油温和床身温度的合理性;最大程度控制床身的伸缩,保证经编机长时间停机后能正常开机。使用改造后的温度控制系统,机器长时间停机后不会发生擦针现象,此系统已在产品中推广使用,有效解决了更换盘头后导致的开机瓶颈,提高了经编机工作效率。

关键词：特里科经编机开机擦针温控系统床身伸缩

The acyclic chromatic index of planar graphs without 4-,6-cycles and intersecting triangles

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Frontiers of Mathematics in China 2024年第3期19卷 117-136页

作者： Yuehua BU Qi JIA hongguo ZHU College of Mathematics and Computer Science Zhejiang Normal UniversityJinhua 321004China Xingzhi College Zhejiang Normal UniversityJinhua 321004China

A proper edge k-coloring is a mappingΦ:E(G)-→{1,2,...,k}such that any two adjacent edges receive different colors.A proper edge k-coloringΦof G is called acyclic if there are no bichromatic cycles in *** acyclic chromatic index of G,denoted by Xa(G),is the smallest integer k such that G is acyclically edge *** this paper,we show that if G is a plane graph without 4-,6-cycles and intersecting 3-cycles,△(G)≥9,then Xa(G)≤△(G)+1.

关键词： Acyclic edge coloring plane graph cycle

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利用卫星重力探测南极冰盖质量变化

测绘科学 2017年第7期42卷 121-126,131页

作者：杨洪国游为青岛农业大学山东青岛266109 西南交通大学地球科学与环境工程学院成都611756

针对不同GIA模型在南极地区的改正差异较大,分析了采用不同GIA模型分析得到的南极冰盖融化误差值,研究了南极冰盖质量变化加速度。研究结果表明,扣除IJ05模型影响后,整个南极冰盖质量以(-81.5±4.2)Gt/a的速度和(-12.3±6.5)Gt/a2的加... 详细信息

针对不同GIA模型在南极地区的改正差异较大,分析了采用不同GIA模型分析得到的南极冰盖融化误差值,研究了南极冰盖质量变化加速度。研究结果表明,扣除IJ05模型影响后,整个南极冰盖质量以(-81.5±4.2)Gt/a的速度和(-12.3±6.5)Gt/a2的加速度融化,对海平面上升贡献分别为(0.23±0.01)mm/a和(0.03±0.02)mm/a2。西南极处于加速融化状态,速度由2003—2008年间的-37.7Gt/a增加至2009—2013年的-156.0Gt/a。东南极冰盖在2009年前处于稳定,2009年后逐渐积累,且积累速度不断增加。2003-2013期间内东南极,西南极冰盖质量变化速度及加速度分别为(28±13.4)Gt/a、(9.8±2.8)Gt/a2、-(108.1±3.5)Gt/a和-(21.1±2.9)Gt/a2,南极冰盖融化主要来自西南极。南极冰盖周年变化影响较强,每年10月左右其质量变化振幅达到最大,半周年变化影响最大在西南极,S2潮波振幅在Ronne冰架附近较大,振幅最大值达到25mm。

关键词： GRACE 南极冰盖质量变化冰川均衡调整

The function of doping nitrogen on removing fluoride with decomposing La-MOF-NH_2:Density functional theory calculation and experiments

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Journal of Environmental Sciences 2024年第1期135卷 118-129页

作者： hongguo Zhang KuilinWan Jia Yan Qian Li Yufang Guo Lei Huang Samuel Raj Babu Arulmani Jian Luo School of Environmental Science and Engineering Guangzhou UniversityGuangzhou 510006China Guangzhou University-Linkoping University Research Center on Urban Sustainable Development Guangzhou UniversityGuangzhou 510006China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Fluoride is an important pollutant in wastewater,and adsorption is an effective way to remove *** nitrogen plays an important role in adsorbent materials,computational models were developed to understand the changes in work function resulting from nitrogen ***-N-C-800℃,was prepared by pyrolyzing La-MOF-NH_(2)to verify the influence on the performance of removing fluoride by *** and electrochemical performance tests were performed to characterize La-N-C-800℃.Adsorption kinetics,adsorption thermodynamics,initial concentrations,pH,and ions competition were investigated using La-N-C-800℃for fluoride *** addition,density functional theory was applied to evaluate the function of *** nitrogen atoms were added,the density of states,partial density of states,populations,and different orbits of charge were calculated to discover deep *** strengthened the carbon structure and La_(2)O_(3)structure to remove *** addition,nitrogen can also act as an adsorption site in the carbon *** results provide design ideas for improving the performance of adsorbent materials by doping elements.

关键词： Capacitive deionization Fluoride La-MOFs Doping nitrogen