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Multipartite Entanglement of a Tetrahedron Lattice

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Communications in Theoretical Physics 2006年第5X期46卷 863-872页

作者： zhang Rong ZHU Shi-qun HAO Xiang School of Physical Science and Technology Suzhou University Suzhou 215006 China

Three-dimensional Heisenberg model in the form of a tetrahedron lattice is investigated. The concurrence and multipartite entanglement are calculated through 2-concurrence C and 4-concurrence C4. The concurrence C and multipartite entanglement G4 depend on different coupling strengths Ji and are decreased when the temperature T is increased. For a symmetric tetrahedron lattice, the concurrence C is symmetric about J1 when J~ is negative while the multipartite entanglement G4 is symmetric about J1 when J2 〈 2. For a regular tetrahedron lattice, the concurrence G of ground state is 1/3 for ferromagnetic case while G = 0 for antiferromagnetic ***. However, there is no multipartitc entanglement since C4=0 in a regular tetrahedron lattice. The external magnetic field 13 can increase the maximum value of the concurrence GB and induce two or three peaks in Cn. There is a peak in the multipartite entanglement G4 B when G4B is varied as a function of the temperature T. This peak is mainly induced by the magnetic field B.

关键词： multipartite entanglement concurrence three dimensions tetrahedron lattice

Simulation and analysis of co-phasing errors of the segmented primary mirror tiled by hexagonal segments in LOT

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Research in Astronomy and Astrophysics 2021年第10期21卷 37-45页

作者： Shi-Dong Shen Xiang-qun Cui Yong zhang National Astronomical Observatories/Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China CAS Key Laboratory of Astronomical Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China University of the Chinese Academy of Sciences Beijing 100049China

In this paper,co-phasing errors of a segmented primary mirror tiled by hexagonal segments are successfully calculated for the 12-meter Large aperture Optical/infrared Telescope(LOT).Co-phasing errors including out-of-plane errors are simulated separately and comprehensively based on several software simulation *** simulation results show that the Strehl Ratio(SR)of LOT is larger than 0.8 when the RMS value of tip-tilt obeying a normal distribution is less than 0.018 arcsec,and the SR of LOT is larger than 0.8 when the RMS value of piston obeying a normal distribution is less than 40 ***,simulation results of Zemax show that the SR of LOT is larger than 0.8 when the RMS value of tip-tilt obeying a normal distribution is less than 0.02 arcsec,and the SR of LOT is larger than 0.8 when the RMS value of piston obeying a normal distribution is less than 40 *** simulation results successfully lay a solid foundation for LOT(especially the segmented primary mirror with active optics).

关键词： methods:analytical techniques:miscellaneous telescopes

Structures of sodium vanadate solution under different conditions

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Rare Metals 2018年第1期37卷 59-65页

作者： Ya-Li zhang Li-qun Yang Xian-Jin Yu School of Chemical Engineering Shandong University of Technology

Combined with Fourier transform infrared spectroscopy（FTIR） analysis of sodium vanadate solution,the relationship between conductivity and structure was investigated by measuring the electric conductivity of the solution under different alkali concentrations and molar ratios of NaOH to V2O5. Results suggest that the polymerization vanadium acid radical ions gradually transform into monomer with the solution diluting. When the solution is diluted to a certain extent,only the vanadium acid radical ion with V-OH chemical bond exists in the solution. At NaOH concentration of below 105.21 g·L^（-1）,the vanadate anions mainly exist in the form of vanadium acid radical ion with V-OH chemical bond and the ion transference number is approximately from 0.58 to 0.82. In the medium NaOH concentration range of 105.21-117.03 g·L^（-1）, the vanadate anions mostly exist in the form of vanadium acid radical ion with V-OH and V-O-V chemical bonds and the ion transference number is approximately 3.29. At NaOH concentration of above 117.03 g·L^（-1）, vanadate anions exist in the form of vanadium acid radical ion with V-OH and V-O-V chemical bonds.

关键词： Sodium vanadate solution Electric conductivity Migration number Infrared spectroscopy

Multifunctional Clay/PNIPAM Hydrogel Incorporating HxMoO3 Plasmonic Quantum Dot

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Energy & Environmental Materials 2020年第2期3卷 192-201页

作者： Hao Li Youzeng Li qun Xu Ali zhang College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450052China School of Materials Science and Engineering Dalian University of TechnologyDalian 116000China

Functional hydrogel is becoming a frequently used material in various fields,especially in biological and medical *** order to overcome the barriers of low uniformity of structure and lack of energy dissipation effect in common hydrogel,in this work a strategy of doping plasmonic HxMoO3 quantum dots into PNIPAM(poly(N-isopropylacrylamide)) hydrogel to proceed its multifunctionalization is *** quantum dots-induced tactic could effectuate the enhancement of photothermal conversion,mechanical property,adhesion,and self-healing performance *** particular,for adhesion performance,the toughness value could be elevated to over 2500 J m-2 ***,the enhancement mechanism behind the extraordinary adhesion performance is studied,and it can be contributed to the synergistic effect of pore structure regulation and abundant hydrogen bond,which are both beneficial to the interaction between composite hydrogel and solid ***,based on its extraordinary adhesion and self-healing performance,the applicability of HxMoO3/PNIPAM hydrogel as a M? growth substrate is investigated on wound dressing,and the experimental result demonstrates its excellent M? growth-promoting activity.

关键词： biological application multifunctionalization plasmonic quantum dots ultraadhesive hydrogel

Estimating Differences in Restricted Mean Lifetime Using Additive Hazards Models under Dependent Censoring

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Acta Mathematicae Applicatae Sinica 2021年第1期37卷 17-34页

作者： qun LI Bao-xue zhang Liu-quan SUN School of Statistics Capital University of Economics and BusinessBeijing 100070China Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

In epidemiological and clinical studies,the restricted mean lifetime is often of direct interest *** differences of this quantity can be used as a basis of comparing several treatment groups with respect to their survival *** the factor of interest is not randomized and lifetimes are subject to both dependent and independent censoring,the imbalances in confounding factors need to be *** use the mixture of additive hazards model and inverse probability of censoring weighting method to estimate the differences of restricted mean *** average causal effect is then obtained by averaging the differences in fitted values based on the additive hazards *** asymptotic properties of the proposed method are also derived and simulation studies are conducted to demonstrate their finite-sample *** application to the primary biliary cirrhosis(PBC)data is illustrated.

关键词： additive hazards model dependent censoring inverse probability censoring weighting mean lifetime

Internal solitary wave generation by the tidal flows beneath ice keel in the Arctic Ocean

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Journal of Oceanology and Limnology 2022年第3期40卷 831-845页

作者： Peiwen zhang qun LI Zhenhua XU Baoshu YIN CAS Key Laboratory of Ocean Circulation and Waves Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China MNR Key Laboratory for Polar Science Polar Research Institute of ChinaShanghai 200136China CAS Engineering Laboratory for Marine Ranching Institute of OceanologyChinese Academy of SciencesQingdao 266071China

A series of non-hydrostatic,non-linear numerical simulations were carried out to investigate the generation and evolution of internal solitary waves(ISWs)through the interaction of a barotropic tidal current with an ice keel in the Arctic *** the interaction process,the internal surge was generated at first,and then the wave gradually steepened due to non-linearity during its propagation away from the ice *** internal surge eventually disintegrated into multi-modal and rank-ordered ISW packets with the largest having an amplitude of O(10)*** experiments demonstrated that the ISWs’amplitudes and energy were proportional to the varying ice keel depths and barotropic tidal fl ow amplitudes,but were insensitive to the changing ice keel *** ISWs can enhance the turbulent dissipation rate of O(10^(-6))W/kg along their propagation ***,heat entrainment induced by the wave-ice interaction can reach O(10)MJ/m per tidal *** study reveals a particular ISW generation mechanism and process in the polar ice environment,which could be important in impacting the energy transfer and heat balance in the Arctic Ocean.

关键词： internal solitary wave(ISW) barotropic tidal flow ice keel the Arctic Ocean

Phase Structure and Crystallization Behavior of Polyethylene in Its Blends with cis-1,4-Butadiene Rubber

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Chinese Journal of Polymer Science 2015年第3期33卷 386-394页

作者： Hong Yao Jun-teng Liu Li-qun zhang 闫寿科 Beijing Key Laboratory of Membrane Science & State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

Phase structure and crystallization behavior of polyethylene （PE） in its blends with cis-1,4-butadiene rubber （BR） at different blend ratios and sample preparation conditions were studied. The PE is finely dispersed in the BR matrix. For samples hot pressed at 145 ℃, circular PE microdomains with randomly oriented PE lamellar aggregates were produced. The domain size and number increase with increasing PE content. When the PE content is over 10 wt%, most of the PE domains impinged each other. The separated PE domains are connected by PE stripes with parallel arranged lamellar aggregates. For samples hot pressed at 140 ℃, elongated PE microdomains with oriented PE lamellar aggregates were obtained due to the shear flow. The crystallization of PE in the blends depends on the phase structure. Confined crystallization of PE occurs in small microdomains at relatively low temperature. With the increase of domain size, the crystallization ability of PE increases while the confined crystallization decreases.

关键词： Polyethylene cis-1,4-Butadiene rubber Blend Crystallization Morphology.

Age, growth, reproductive biology, color pattern, and ontogenetic divergence of two closely related rock?shes (Sebastes koreanus and S. nudus) off the coasts of the Shandong Peninsula, China

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Journal of Oceanology and Limnology 2020年第1期38卷 204-225页

作者： ZHUANG Longchuan zhang Chi LIU qun YE Zhenjiang College of Fisheries Ocean University of China

The live-bearing genus Sebastes is renowned for its outstanding species richness and color diversity,and its speciation has been a point of *** study investigated the age,growth,reproductive biology,color pattern and ontogenetic divergence of a pair of closely related rockfishes from the coasts of the Shandong Peninsula,namely,Sebastes koreanus(n=879)and ***(n=257).Marginal increment analysis of sectioned otoliths showed that annulus formation occurred once a year between June and July in both *** sex-pooled growth curves of *** and 3 populations of *** differed significantly from each *** apparent latitudinal cline in growth parameters was found in *** both species,the peak parturition periods were from April to May,and the peak copulation periods were from November to *** has a highly variable and conspicuous color pattern while *** has a stable and dull color *** difference,together with the overlapping distribution and the close relationship,make *** and *** an ideal model to investigate the color-driven speciation of the *** confirmed that *** changes its body color with age and season and fully expresses the carotenoid-based nuptial coloration when the fish reaches first ***,our comparisons of morphological traits that are likely related to survival and quality of these fishes suggested that *** may suffer higher predation risk and foraging difficulty beginning at age *** light of the ontogenetic development of the color pattern in ***,we suggested that the full expression of nuptial coloration most likely triggers the strong selective pressure to enhance swimming performance,anti-predator defense and foraging capacity of *** through predator-prey *** understanding all these details,we further inferred a hypothesis that both color pattem and bathymetric segregation play key roles in facilitating the speciation of demersal r

关键词： Sebastes growth color pattern speciation

Expression Levels of RFP in Normal and Cancer Human Tissues via Real-time RT-PCR Detection

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Chemical Research in Chinese Universities 2006年第4期22卷 443-446页

作者： JIN Xiang-qun zhang Jing-min XU Hui zhang Han-qi College of Chemistry Jilin University Changchun 130012 P.R. China College of Pharmacy Jilin University Changchun 130021 P. R. China

Ret finger protein（RFP） is a member of the tripartite motif family, which is characterized by a conserved RING finger of motif, a B-box, and a coiled-coil domain（they are called RBCC generally）. Although RFP was known to be an oncogene when its RBCC moiety was connected with a tyrosine kinase domain by DNA rearrangement, its biological function was not well defined. In this study, by using real-time RT-PCR, the RFP expressions in human and mouse normal tissues, and in the cervical squamous cell carcinoma, endometrial adenocarcinoma, gastric adenocarcinoma, esophageal squamous cell carcinoma, and brain cancer tissues were analyzed. The result of the study proved that the highest level of mRNA reverse transcription appeared in the normal testical tissue, whereas that in other normal tissues of human and mice were low. The mRNA reverse transcription level of RFP was higher in the endometrial adenocarcinoma tissue than in the cervical squamous cell carcinoma tissue; the mRNA reverse transcription level of RFP in the gastric adenocarcinoma tissue was significantly higher than that in the esophageal squamous cell carcinoma tissue. It was also found that the mRNA reverse transcription level of RFP in the brain cancer tissue was higher than that in the normal brain tissue. These results suggested that RFP could possibly be a useful molecular target for the development of new therapeutics for malignant tumors.

关键词： RFP Real-time RT-PCR Carcinoma Cancer