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Thermal Entanglement of a Three-Qubit Heisenberg Chain with a Nonuniform Magnetic Field

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Communications in Theoretical Physics 2008年第6期49卷 1635-1638页

作者： yang guo-hui ZHOU Ling School of Physics and Optoelectronic Technology Dalian University of Technology Dalian 116023 China

The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement （NNNE） could be larger than the nearest neighbor entanglement （NNE）. We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.

关键词： Heisenberg model entanglement nonuniform magnetic field

A modified technique of bone grafting pedicled with femoral quadratus for alcohol-induced osteonecrosis of the femoral head

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Chinese Medical Journal 2010年第20期123卷 2847-2852页

作者： WANG Yi-sheng ZHANG Yi LI Jun-wei yang guo-hui LI Jin-feng yang Jie yang Guang-hui Department of Orthopedic Surgery First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China

Background Quadratus femoris pedicled bone grafting has yielded satisfactory long-term clinical outcome for osteonecrosis of the femoral head （ONFH） in pre-collapse ONFH without extensive lesion. However, for pre-collapse ONFH with extensive necrotic area, it is still challenging to preserve the femoral head. The current study aimed to introduce a new technique of deliquesce strut with titanium mesh containing bone grafting pedicled with the femoral quadratus and to evaluate its short-term *** From January 2008 to December 2008, 10 ONFH patients （12 hips） underwent operations by a new technique of deliquesce strut with titanium mesh containing bone grafting pedicled with the femoral quadratus （group A）.According to the ARCO classification system, there were two hips in stage Ⅱ B and 10 hips in stage Ⅱ C. Also in the same period, 12 ONFH patients （16 hips） underwent operations by the conventional procedure of quadratus femoris pedicled bone grafting （group B）. There were 6 hips in stage Ⅱ B and 10 hips in stage Ⅱ C. All patients were males and suffered from alcohol induced ONFH. For the new technique, the necrotic area was evaluated, and a titanium mesh piece of the same size （range from 2.5 cm×2.8 cm to 2.8 cm×3.4 cm） was obtained and shaped to match the contour of the head. The cancellous bone was first placed underneath the subchondral bone and was densely impacted （about 1 to 2 mm thick）.Then the titanium mesh piece was inserted. The length of the decompressive trough was measured. A titanium cylinder mesh cage with a diameter of 1.6 cm of the same length was obtained, with a ＂U＂ shaped window in the wall being created to make room for the muscle pedicle. The muscle pedicle bone was inserted into the titanium mesh cage to form a bone graft-titanium cage complex and, then the complex was inserted. The hundred percent score method was used for outcome evaluation. Clinical and radiographic outcomes were compared between group A and group *** The a

关键词： osteonecrosis of femoral head titanium mesh pedicled with quadratus femoris strut bone grafting deliquesce prop

Quantum States Transfer by Analogous Bell States

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Communications in Theoretical Physics 2008年第2期49卷 347-350页

作者： MEI Di LI Chong yang guo-hui SONG He-Shan Department of Physics Dalian University of Technology Dalian 116023 China

Transmitting quantum states by channels of analogous Bell states is studied in this paper. We analyze the transmitting process. constructed the probabilitic unitary operator, and gain the largest successful transfer q... 详细信息

关键词： quantum state transfer analogous Bell state transfer quantum state probability

Entanglement in Anisotropic Heisenberg XYZ Chain with Inhomogeneous Magnetic Field

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Communications in Theoretical Physics 2007年第3X期48卷 453-456页

作者： yang guo-hui GAO Wen-Bin ZHOU Ling SONG He-Shan Department of Physics Dalian University of Technology Dalian 116023 China

The thermal entanglement of a two-qubit anisotropic Heisenberg XYZ chain under an inhomogeneous magnetic field b is studied. It is shown that when inhomogeneity is increased to a certain value, the entanglement can exhibit a larger revival than that of less values of b. The property is both true for zero temperature and a finite temperature. The results also show that the entanglement and threshold temperature can be increased by increasing inhomogeneous external magnetic field.

关键词： Heisenberg model entanglement inhomogeneous magnetic field

Effects of Different Time-Dependent Couplings on Two-Atom Entanglement

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Communications in Theoretical Physics 2007年第5期47卷 909-912页

作者： ZHOU Ling GAO Wen-Bin yang guo-hui SONG He-Shan Department of Physics Dalian University of Technology Dalian 116024 China

The effects of different time-independent and time-dependent couplings on two-atom entanglement are studied. The results show that the effects depend on the initial state. For the initial state ｜eeO〉, it is found that different time-independent couplings make the case without entanglement exhibit entanglement, and time-dependent couplings turn the irregular entanglement regions into regular one. Under the case of decay, for the initial state ｜eg0〉, the different time-dependent couplings have disbenefit.

关键词： different time-dependent couplings entanglement quantum jump approach

Crystalline-amorphous M@MN_x(M=Co,Fe,Ni)encapsulated in nitrogen-doped carbon for enhanced efficient and durable hydrogen evolution reaction

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Rare Metals 2024年第4期43卷 1547-1556页

作者： yang yang Xiao-Chuan Duan Shao-hui guo Xian-Ming Zhang College of Materials Science and Engineering College of ChemistryKey Laboratory of Interface Science and Engineering in Advanced MaterialsTaiyuan University of TechnologyYuci030600China

Developing earth-abundant electrocatalysts for hydrogen evolution reaction(HER)is important for the sustainable energy ***,efficient and stable heterocatalysts consisting of crystalline-amorphous M@MN_(x)(M=Co,Fe,Ni)encapsulated in N-doped carbon layers supported with N-doped graphene sheets(denoted as M@MN_(x)@NC-NG)are synthesized by facile hydrothermal reaction and nitridation *** the nitriding process,metal ions in M(tzbc)_2(H_(2)O)_4(tzbc=4-(1H-1,2,4-triazol-1-yl)benzoic acid)complexes are reduced to crystalline M cores,accompanied by the formation of amorphous MN_(x)shells;the tzbc ligands are insitu carbonized to form outermost N-doped carbon(NC)layers that connect with inner MN_(x)via M-N-C motifs inherited from the complex precursors and inhibit the transition of MN_(x)from amorphous to crystalline *** Co@CoN_(x)@NC-NG catalyst exhibits excellent HER activity with small overpotentials of 45 and 64 mV at a cathode current density of 10 mA·cm^(-2)and low Tafel slopes of 40 and 85 mV·dec^(-1)in 0.5 mol·L^(-1)H_(2)SO_4 and1.0 mol·L^(-1)KOH electrolytes,*** Co@CoN_(x)@NC-NG retains 97%of the initial overpotential after 100,000 s in both acidic and alkaline *** outstanding HER performance originates from the crystalline-amorphous Co@CoN_(x)that redistributes electrons around the heterointerfaces,facilitating the conversion process of H^(+)/H_(2)O to hydrogen and thereby promoting HER *** outermost NC layers serve as the armor of Co@CoN_(x),and graphene nanosheets act as carriers of egg-like Co@CoN_(x)@NC and conduction paths for electron shuttles,ensuring stable and continuous electrocatalytic hydrogen production.

关键词： Hydrogen evolution reaction Electrocatalysts Iron group metals Heterojunction Crystalline-amorphous structure

Novel Methodology for Designing Frequency Selective Surfaces with Miniaturized Cells

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Journal of Harbin Institute of Technology(New Series) 2013年第2期20卷 1-6页

作者： guo-hui yang Wan-Lu Li Tong Zhang Qun Wu Xue-Mai Gu Dept. of Microwave Engineering Harbin Institute of Technology The Fu Foundation School of Engineering and Applied Science Columbia University

Miniaturization of Frequency Selective Surface's ( FSS's) size is significant for its application in the limited space. In this paper, a novel methodology for designing low-profile FSS is discussed, and a corresponding multi-layer structure with lumped elements for band-pass response is presented. Based on the equivalent circuit theory,the inductive designed center layer is firstly discussed. Then different numbers of additional capacitive designed layers are added and their performances are presented. Finally,the lumped elements are added both between adjacent layers and between adjacent cells of the additional layers so that the miniaturization performance can be further improved. The simulations for each structure in waves of different polarizations and incident angles are conducted,and the results are presented,which demonstrate the claimed characteristics of the proposed structure.

关键词： FSS miniaturization multi-layer polarization stability

Progress in the research on organic piezoelectric catalysts for dye decomposition

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 245-260页

作者： Zhaoning yang Xiaoxin Shu Di guo Jing Wang hui Bian Yanmin Jia School of Science Xi’an University of Posts and TelecommunicationsXi’an 710121China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710119China

Organic contaminants have posed a direct and substantial risk to human wellness and the *** recent years,piezo-electric catalysis has evolved as a novel and effective method for decomposing these *** piezoelectric materials offer a wide range of options,most related studies thus far have focused on inorganic materials and have paid little attention to organic *** materials have advantages,such as being lightweight,inexpensive,and easy to process,over inorganic ***,this paper provides a comprehensive review of the progress made in the research on piezoelectric catalysis using organic materials,high-lighting their catalytic efficiency in addressing various *** addition,the applications of organic materials in piezoelectric cata-lysis for water decomposition to produce hydrogen,disinfect bacteria,treat tumors,and reduce carbon dioxide are ***,fu-ture developmental trends regarding the piezoelectric catalytic potential of organic materials are explored.

关键词： piezoelectric catalysis piezoelectric material dye decomposition organic materials

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奥美普林的合成工艺改进

广州化工 2024年第9期52卷 98-100页

作者：黄凯贾兴李冀李金明杨国辉周岩河北远征药业有限公司河北省兽药技术创新中心河北石家庄050041

5-(4,5-二甲氧基-2-甲基苄基)-2,4-二氨嘧啶,又称为奥美普林,是一种抗菌增效剂,常与磺胺类抗菌药合用,可扩大磺胺类抗菌药的抗菌谱,显著提高磺胺类抗菌药的抗菌效果。在前人研究的基础上对奥美普林的合成工艺进行了改进,采用溴素代替原... 详细信息

5-(4,5-二甲氧基-2-甲基苄基)-2,4-二氨嘧啶,又称为奥美普林,是一种抗菌增效剂,常与磺胺类抗菌药合用,可扩大磺胺类抗菌药的抗菌谱,显著提高磺胺类抗菌药的抗菌效果。在前人研究的基础上对奥美普林的合成工艺进行了改进,采用溴素代替原工艺中氢溴酸的卤代反应,避免了氧气的制备与应用,条件更加温和,增加了整个工艺中的可操作性,更适用于工业化大生产。此外还对工艺中工艺条件进行了筛选,确定了最佳的反应条件。

关键词：奥美普林 5-(4,5-二甲氧基-2-甲基苄基)-2,4-二氨嘧啶工艺改进

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