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Ground-State Phase Diagram of Transverse Spin-2 Ising Model with Longitudinal Crystal-Field

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Communications in Theoretical Physics 2006年第4期45卷 749-753页

作者： ZHAO Jie WEI Guo-Zhu xu xing-Guang College of Science Northeastern University Shengyang 110006 China College of Science Liaoning University of Petroleum ＆ Chemical Technology Fushun 113001 China

The transverse spin-2 Ising ferromagnetic model with a longitudinal crystal-field is studied within the mean-field theory based on Bogoliubov inequality for the Gibbs free energy. The ground-state phase diagram and the tricritical point are obtained in the transverse field Ω/ zJ-longitudinal crystal D / zJ field plane. We find that there are the first order-order phase transitions in a very small range of D /zJ besides the usual first order-disorder phase transitions and the second order-disorder phase transitions,

关键词： transverse spin-2 Ising model longitudinal crystal field ground state phase diagram first orderorder phase transition

Prospect of MH-Ni Batteries Development

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Journal of Rare Earths 2004年第Z1期22卷 309-312页

作者： xu Shaoping xing Zhiqiang Liang Wanlong Ma Yijun Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co. Ltd. Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co. Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co. Ltd.Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Co. Ltd.Baotou 014030 China

The development trend and promising application prospects of high-power MH-Ni battery were reviewed by studying and comparing the current high-power batteries research ***-power MH-Ni batiery has good performlife with 500 ～ 1000 times, abundant material resource, especially abundant rare earth resource in China, high-rate discharging, rapid charging, good safety as well as no pollution, etc., which is regarded as the most promising storage battery for electric *** performance of high power MH-Ni battery can be brought into play fully and ensure electric vehicles performance if it is equipped with appropriate chargers, controlling system and electric *** opportunities and challenges, MH-Ni battery has promising application prospects on hybrid electric automobile, electric bicycle and a variety of small sized electric vehicles by improving its technology constantly and developing market actively.

关键词： MH/Ni battery high-power battery development prospect

Robust Text Detection in Natural Scenes Using Text Geometry and Visual Appearance

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International Journal of Automation and computing 2014年第5期11卷 480-488页

作者： Sheng-Ye Yan Xin-xing xu Qing-Shan Liu School of Information and Control Nanjing University of Information Science and Technology School of Computer Engineering Nanyang Technological University

This paper proposes a new two-phase approach to robust text detection by integrating the visual appearance and the geometric reasoning rules. In the first phase, geometric rules are used to achieve a higher recall rate. Specifically, a robust stroke width transform(RSWT) feature is proposed to better recover the stroke width by additionally considering the cross of two strokes and the continuousness of the letter border. In the second phase, a classification scheme based on visual appearance features is used to reject the false alarms while keeping the recall rate. To learn a better classifier from multiple visual appearance features, a novel classification method called double soft multiple kernel learning(DS-MKL) is proposed. DS-MKL is motivated by a novel kernel margin perspective for multiple kernel learning and can effectively suppress the influence of noisy base kernels. Comprehensive experiments on the benchmark ICDAR2005 competition dataset demonstrate the effectiveness of the proposed two-phase text detection approach over the state-of-the-art approaches by a performance gain up to 4.4% in terms of F-measure.

关键词： Text detection geometric rule stroke width transform (SWT) support vector machine (SVM) multiple kernel learning (MKL)

Quantum fluctuations of mesoscopic damped mutual capacitance coupled double resonance RLC circuit in thermal excitation state

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Optoelectronics Letters 2007年第1期3卷 73-77页

作者： xu xing-Lei Department of Physics Heze University Shandong 274015 China Laboratory of Quantum Communication and Calculation Heze University Shandong 274015 China

Mesoscopic damped mutual capacitance coupled double resonance circuit is quantized by the method of damped harmonic oscillator quantization. Hamiltonian is diagonalized by the method of unitary transformation. The energy spectra of this circuit are given. The quantum fluctuations of the charge and current of each loop are investigated by the method of thermo- field dynamics (TFD) in thermal excitation state,thermal squeezed vacuum state, thermal vacuum state and vacuum state. It is shown that the quantum fluctuations of the charge and current are related to not only circuit inherent parameter and coupled magnitude, but also quantum number of excitation, squeezed coefficients, squeezed angle and environmental temperature. And the quantum fluctuations increase with the increase of temperature and decay with time.

关键词：介观电容耦合阻尼双谐振 RLC电路热激发态量子涨落

Flocculation behaviors of a novel papermaking sludge-based flocculant in practical printing and dyeing wastewater treatment

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 283-293页

作者： Kangying Guo Baoyu Gao Jie Wang Jingwen Pan Qinyan Yue xing xu Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao266237China

In our previous studies,several papermaking sludge-based flocculants(PSBFs)were synthesized from wood pulp papermaking *** structure-activity relationships of the PSBFs have been investigated in simulated dye wastewater treatment,but their efficiencies in practical printing and dyeing wastewater(PPDW)treatment are ***,an PSBF was prepared,and its performance is discussed in comparison to polyaluminium chloride(PAC)and polyacrylamide(PAM)in PPDW *** PSBF was used in three ways:as an independent flocculant,as a PAC aid,or used to treat the effluent of the PAC *** results indicated that adding PSBF alone produced similar color and chemical oxygen demand(COD_(Cr))removals as the PAC system alone,but PSBF performed better than PAC when the pH of PPDW was higher than *** PSBF as a PAC aid improved the color,COD_(Cr)and turbidity removals,but the elimination efficiencies were slightly lower than those of the PAC+PAM ***,when PSBF was used as a flocculant to treat the effluent of the PAC system(PAC→PSBF),the effluent qualities were *** with the PAC system,the color and COD_(Cr)removals of PAC→PSBF system increased by 16.21%and 13.26%,*** excitation and emission matrix fluorescence results indicated that PSBF removed tryptophan-like pollutants more efficiently than *** the pH requirements of the subsequent bioreactor treatment in practice,the PAC→PSBF system were also investigated at the PPDW pH level of *** maximum removal efficiencies of color,COD_(Cr)and turbidity were 90.17%,32.60%and 82.50%,respectively.

关键词： Practical wastewater treatment Commercial coagulant/flocculant Secondary coagulation-flocculation process Chemical oxygen demand Coagulation-flocculation mechanism

A Juvenile Specimen of Sauropodomorpha from the Lower Jurassic of China and a Brief Review of the Lufeng Sauropodomorph Fauna

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 319-332页

作者： Claire PEYRE DE FABREGUES BI Shundong AI Tianyu xu xing Centre for Vertebrate Evolutionary Biology Institute of PalaeontologyYunnan UniversityKunming 650091China Department of Biology Indiana University of PennsylvaniaIndianaPA 15705USA Independent Researcher Kunming 650091China Key Laboratory of Evolutionary Systematics of Vertebrates Institute of Vertebrate Paleontology&PaleoanthropologyChinese Academy of SciencesBeijing 100044China

An incomplete dinosaur skeleton,including a partial skull,recently discovered from the Lower Jurassic Lufeng Formation of Yunnan,China,is here *** from its small size,little anatomical evidence supports,a priori,the non-adult status of this new sauropodomorph specimen but osteohistological analyses suggest that it is a fast-growing *** specimen represents only the second occurrence of a juvenile non-sauropodan sauropodomorph in the Lufeng *** anatomy of the new specimen does not match that of other Lower Jurassic immature specimens;although cranial material is preserved,it does not display the diagnostic characters of early sauropodomorphs from the same horizon,namely Lufengosaurus,Yizhousaurus and *** phylogenetic analysis places the new specimen in a position relatively distant from other Chinese sauropodomorphs,and corroborates the anatomical evidence showing it is not referable to any known species already excavated in *** result is interpreted with caution considering that ontogeny affects phylogenetic reconstruction.A thorough comparison with adult forms,taking into account ontogenyrelated characters,suggests that this Lufeng juvenile might represent a previously unknown species of early sauropodomorph.

关键词： Sauropodomorpha juvenile faunal review Jurassic Lufeng Yunnan province

Functional Investigation of a GRIN2A Variant Associated with Rolandic Epilepsy

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Neuroscience Bulletin 2018年第2期34卷 237-246页

作者： xing-xing xu Xiao-Rong Liu Cui-Ying Fan Jin-xing Lai Yi-Wu Shi Wei Yang Tao Su Jun-Yu xu Jian-Hong Luo Wei-Ping Liao Department of Neurobiology Key Laboratory of Medical Neurobiology (Ministry of Health of China) Collaborative Innovation Center for Brain Science Zhejiang University School of Medicine Institute of Neuroscience Department of the Second Affiliated Hospital of Guangzhou Medical University Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China

N-methyl-D-aspartate receptors（NMDARs）, a subtype of glutamate-gated ion channels, play a central role in epileptogenesis. Recent studies have identified an increasing number of GRIN2 A（a gene encoding the NMDAR GluN2A subunit） mutations in patients with epilepsy. Phenotypes of GRIN2 A mutations include epilepsy-aphasia disorders and other epileptic encephalopathies, which pose challenges in clinical treatment. Here we identified a heterozygous GRIN2 A mutation（c.1341 T[A, p.N447 K） from a boy with Rolandic epilepsy by whole-exome sequencing. The patient became seizurefree with a combination of valproate and *** investigation was carried out using recombinant NMDARs containing a GluN2A-N447 K mutant that is located in the ligand-binding domain of the GluN2A subunit. Whole-cell current recordings in HEK 293 T cells revealed that the N447 K mutation increased the NMDAR current density by;.2-fold, enhanced the glutamate potency by 2-fold, and reduced the sensitivity to Mg;inhibition. These results indicated that N447 K is a gain-offunction mutation. Interestingly, alternative substitutions by alanine and glutamic acid at the same residue（N447 A and N447 E） did not change NMDAR function, suggesting a residual dependence of this mutation in altering NMDAR function. Taken together, this study identified human GluN2A N447 K as a novel mutation associated with epilepsy and validated its functional consequences in *** of this mutation is also helpful for advancing our understanding of the role of NMDARs in epilepsy and provides new insights for precision therapeutics in epilepsy.

关键词： Epilepsy NMDA receptors GRIN2A Mutation

A New Sapeornithid Bird from China and Its Implication for Early Avian Evolution

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Acta Geologica Sinica(English Edition) 2010年第3期84卷 472-482页

作者： HU Dongyu LI Li HOU Lianhai xu xing Shenyang Normal University Shenyang Liaoning 110034 China Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China.

Recent discoveries of basal birds have greatly improved our understanding of early bird evolution, yet the evolution of several important features such as cranial kinesis and arboreality remain debated. A new sapeornithid bird, Shenshiornis primita gen. et sp. nov., based on an articulated skeleton from the Early Cretaceous Jehol Group of western Liaoning, China, sheds new light on these issues. Shenshiornis possesses a skull as primitive as or even more primitive than that of Archaeopteryx and hind limbs modified for an improved arboreal capability. A cladistic analysis shows that： 1） presence of a diapsid skull is a plesiomorphy of the Aves and a kinetic skull evolved incrementally later in avian evolution; and 2） cursorial capability significantly weakens at the base of the Pygostylia due to a change in locomotor system.

关键词： basal bird Cranial kinetism locomotor systems sapeornithid Shenshiornis primita Early Cretaceous Liaoning

Novel pricing model for spectrum leasing in secondary spectrum market

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The Journal of China Universities of Posts and Telecommunications 2010年第5期17卷 12-19页

作者： WANG Lei xu xing-kun xu Wen-jun HE Zhi-qiang LIN Jia-ru Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

According to the property rights model of cognitive radio,primary users who own the spectral resource have the right to lease or trade part of it to secondary users in exchange for appropriate *** this paper,an implementation of this framework is investigated,where a primary link can lease the owned spectrum to secondary nodes in exchange for cooperation （relaying）.A novel pricing model is proposed that enables the trading between spectrum and *** on the demand of secondary nodes,the primary link attempts to maximize its quality of service （QoS） by setting the price of *** the price asked by primary link,the secondary nodes aim to obtain most profits by deciding the amount of spectrum to buy and then pay for it by cooperative *** investigated model is conveniently cast in the framework of seller/buyer （Stackelberg） *** and numerical results show that our pricing model is effective and practical for spectrum leasing based on trading spectral resource for cooperation.

关键词： cognitive radio property rights cooperative transmission spectrum leasing secondary spectrum market