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偏称宾语被动句的类型学考察 被引量:1
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作者 李思旭 《东方语言学》 2011年第2期124-140,共17页
本文利用语言类型学的研究方法,跨语言或跨方言探讨了一种非常特殊的被动句——偏称宾语被动句。首先描写其句法特征,然后对汉语方言和中国境内民族语言中的词类被动句作了考察和阐释,并分析古代汉语中此类被动句的产生年代及动因。最... 本文利用语言类型学的研究方法,跨语言或跨方言探讨了一种非常特殊的被动句——偏称宾语被动句。首先描写其句法特征,然后对汉语方言和中国境内民族语言中的词类被动句作了考察和阐释,并分析古代汉语中此类被动句的产生年代及动因。最后以本文的研究为例,说明语言类型学在中国具有极为广阔的发展空间和较大的发展潜力。 展开更多
关键词 被动句 偏称宾语 焦点 语序 类型学
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莆田方言母亲称谓的调查分析 被引量:6
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作者 陈琦敏 《莆田学院学报》 2009年第6期96-100,共5页
在对称谓研究已有成果进行分析、借鉴的基础上,拟结合民俗文化和语言本体,对莆田方言中母亲称谓的演变进行描写。并在此基础上,分析该语言现象产生的语言内因和文化外因。
关键词 莆田方言 母亲 偏称
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A Multifunctional Chiral Metasurface with Asymmetric Transmission and Linear-Polarization Conversion
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作者 AFZAL Ahmed CAO Qunsheng MUHAMMAD Sajjad 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2024年第S01期21-26,共6页
In this paper,a multifunctional chiral metasurface is presented to achieve asymmetric transmission(AT)and linear-polarization conversion(LPC).The designed metasurface consists of a cross swords-like shape and two hole... In this paper,a multifunctional chiral metasurface is presented to achieve asymmetric transmission(AT)and linear-polarization conversion(LPC).The designed metasurface consists of a cross swords-like shape and two holes in the lower side of the unit cell.In the frequency band from 8.3 GHz to 10.4 GHz,AT is realized with more than 90%efficiency and the same chiral metasurface transforms linear polarized wave into its orthogonal counterpart with high efficiency.For LPC,the polarization conversion ratio(PCR)is greater than 95%.The proposed metasurface is stable against the incident angles of striking electromagnetic(EM)waves up to 60°for both operations of AT and LPC. 展开更多
关键词 chiral metasurface polarization conversion asymmetric tranmission plasmon resonances
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广义存现句的制图分析 被引量:1
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作者 康兴 《语言科学》 CSSCI 北大核心 2022年第1期13-26,共14页
文章尝试以句法制图为理论框架,结合前人研究成果,对广义存现句的生成机制及表达存现意义的功能中心语进行制图分析。核心观点是,不同类型的广义存现句受到不同句法层级的偏称算子的管辖,但它们有着相似的成句条件。文章从存在封闭影响... 文章尝试以句法制图为理论框架,结合前人研究成果,对广义存现句的生成机制及表达存现意义的功能中心语进行制图分析。核心观点是,不同类型的广义存现句受到不同句法层级的偏称算子的管辖,但它们有着相似的成句条件。文章从存在封闭影响下的存现句中内论元的允准条件、体标记下的存现算子、模态词层级下的存现算子以及ExiP下的显性存现算子四个方面,对广义存现句的基础生成和偏称量化语力的获取方式进行分析和探讨,并以此绘制存现句句法特征地貌图。 展开更多
关键词 存现句 制图理论 偏称量化 左缘结构
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30kg/m轻轨孔型设计
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作者 谢权 《轧钢》 2008年第1期34-37,共4页
简述了在Φ650mm轧机上轧制30kg/m轻轨孔型系统的优化和孔型设计要点。在二列式轧机上采用6个轨形孔的孔型系统,可以减轻底厚的帽形孔轧件在轨形切深孔中形成闭口腿楔卡的现象,减少腿长偏称缺陷。
关键词 30kg/m轻轨 孔型设计 闭口腿楔卡 腿长偏称
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如何提高X型固态压力传感器的温度补偿
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作者 罗晓红 《计量技术》 2002年第2期30-31,共2页
本文介绍了产生X型固态压力传感器温度误差的原因 ,通过实验与分析 ,提出了解决这些误差的简便方法 ,在精度要求不是很高的大多数场合 。
关键词 X型固态压力传感器 温度补偿 误差 满度范围 偏称电压
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Getting pre-stack time migration travel times from the single square root operator 被引量:6
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作者 Liu Guofeng Liu Hong +1 位作者 Li Bo Meng Xiaohong 《Applied Geophysics》 SCIE CSCD 2009年第2期129-137,共9页
Improving the focusing capability of pre-stack time migration allows the imaged section to reflect structural characteristics, depth, and interface shape and it is a key step for the preparation of the initial depth m... Improving the focusing capability of pre-stack time migration allows the imaged section to reflect structural characteristics, depth, and interface shape and it is a key step for the preparation of the initial depth migration velocity model. The traditional symmetrical travel time equation is derived based on the assumption of a layered model. It is difficult to achieve the desired effect of focusing in media with strong lateral variation. The nonsymmetrical travel time equation based on Lie algebra and a pseudo-differential operator contains a lateral velocity derivative which can improve the focusing capability even in strongly lateral variable media and also the computation precision of the weight coefficients for relative amplitude preservation. Compared with the symmetrical methods, the nonsymmetrical method is more effective. In this paper, we describe several key steps of nonsymmetric pre-stack travel time calculation and present some test results using synthetic and real data. 展开更多
关键词 single square root operator travel time Lie algebra pseudo-differential operator
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A rapid and sensitive method to detect mycobacterium tuberculosis DNA by fluorescence polarization 被引量:1
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作者 白玉杰 赵锦荣 +4 位作者 薛丽 刘爱翔 张文红 郭晏海 闫小君 《Journal of Medical Colleges of PLA(China)》 CAS 2004年第4期219-221,共3页
Objective: To develop a new high sensitivity, rapid and simple mycobacterium tuberculosis DNA detection method using fluorescence polarization technology. Methods: In our asymmetric PCR protocol, 100 times mole of TB-... Objective: To develop a new high sensitivity, rapid and simple mycobacterium tuberculosis DNA detection method using fluorescence polarization technology. Methods: In our asymmetric PCR protocol, 100 times mole of TB-R primer was added than in the usual symmetric PCR to get enough single strands PCR product. The probe TB-5′-TAMRA and PCR products were mixed in a tube and incubate for 5-15 min at 46 ℃.The polarization (mp) was measured using victor2 Multilabel Plate Reader. Results: Asymmetric and symmetric PCR products were analyzed by the FP method. Asymmetric PCR products are detected more sensitively than symmetric ones. The polarization values of probe associated with asymmetric products were much higher than with symmetric products. Conclusion: This fluorescence polarization assay in conjunction with asymmetric PCR is a powerful and widely applicable method for the rapid and sensitive detection of micro-organisms in clinical laboratories. 展开更多
关键词 mycobacterium tuberculosis asymmetric polymerase chain reaction fluorescence polarization
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Study of (2+1)-Dimensional Higher-Order Broer-Kaup System 被引量:8
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作者 WANG Ling LIU Xi-Qiang DONG Zhong-Zhou 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第3期403-408,共6页
Painleve property and infinite symmetries of the (2+1)-dimensional higher-order Broer-Kaup (HBK) system are studied in this paper. Using the modified direct method, we derive the theorem of general symmetry gro.u... Painleve property and infinite symmetries of the (2+1)-dimensional higher-order Broer-Kaup (HBK) system are studied in this paper. Using the modified direct method, we derive the theorem of general symmetry gro.ups to (2+1)-dimensional HBK system. Based on our theorem, some new forms of solutions are obtained. We also find infinite number of conservation laws of the (2+1)-dimensional HBK system. 展开更多
关键词 (2+1)-dimensional HBK system Painleve property SYMMETRIES exact solution conservation laws
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A Scheme for Spin Manipulation in a Quantum Dot with Both Charge and Spin Bias
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作者 赵华 张小伟 +1 位作者 蔡托 周光辉 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第2期359-361,共3页
We propose a scheme for the effective polarization and manipulation of electron spin by using a quantum dot with both charge and spin bias. Using the equation of motion for Keldysh nonequilibrium Green function, we st... We propose a scheme for the effective polarization and manipulation of electron spin by using a quantum dot with both charge and spin bias. Using the equation of motion for Keldysh nonequilibrium Green function, we study the spin accumulation and polarization for the system. Through analytical analysis and a few numerical examples, it is demonstrated that fairly large spin accumulation and polarization can be produced due to the breaking symmetry of the chemical potential for different electron spin in the leads. Moreover, the direction and the strength of the spin polarization can be conveniently controlled and tuned by varying the charge bias or the gate voltage. 展开更多
关键词 quantum dot spin bias spin polarization nonequilibrium Green function
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A Note on Nonclassical Symmetries of a Class of Nonlinear Partial Differential Equations and Compatibility 被引量:2
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作者 WAN Wen-Tao CHEN Yong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第9期398-402,共5页
The nonclassical symmetries of a class of nonlinear partial differential equations obtained by the compatibility method is investigated. We show the nonclassicaJ symmetries obtained in [J. Math. Anal. Appl. 289 (2004... The nonclassical symmetries of a class of nonlinear partial differential equations obtained by the compatibility method is investigated. We show the nonclassicaJ symmetries obtained in [J. Math. Anal. Appl. 289 (2004) 55, J. Math. Anal. Appl. 311 (2005) 479] are not all the nonclassical symmetries. Based on a new assume on the form of invariant surface condition, all the nonclassical symmetries for a class of nonlinear partial differential equations can be obtained through the compatibility method. The nonlinear Klein-Gordon equation and the Cahn-Hilliard equations all serve as examples showing the compatibility method leads quickly and easily to the determining equations for their all nonclassical symmetries for two equations. 展开更多
关键词 nonclassical symmetries compatibility determining equations nonlinear Klein Gordon equation Cahn Hilliard equations
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Solution of ODE u″+p(u)(u′)2+q(u)=0 and Applications to Classifications of All Single Travelling Wave Solutions to Some Nonlinear Mathematical Physics Equations 被引量:8
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作者 LIU Cheng-Shi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第2期291-296,共6页
Under the travelling wave transformation, some nonlinear partial differential equations such as Camassa-Holm equation, High-order KdV equation, etc., are reduced to an integrable ODE expressed by u" +p(u)(u')^2... Under the travelling wave transformation, some nonlinear partial differential equations such as Camassa-Holm equation, High-order KdV equation, etc., are reduced to an integrable ODE expressed by u" +p(u)(u')^2 + q(u) = 0 whose generai solution can be given. Furthermore, combining complete discrimination system for polynomiai, the classifications of all single travelling wave solutions to these equations are obtained. The equation u"+p(u)(u')^2+q(u) = 0 includes the equation (u')^2 = f(u) as a special case, so the proposed method can be also applied to a large number of nonlinear equations. These complete results cannot be obtained by any indirect method. 展开更多
关键词 classification of travelling wave solution symmetry group nonlinear partial differential equation
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Biased Motion in a Symmetric Periodic Potential by Breaking Temporal Sysmmetry
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作者 ZHENGZhi-Gang LIXiao-Wen 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第2期151-156,共6页
Unidirectional transport of a particle in a spatially periodic and symmetric potential under a periodic force with broken temporal symmetry is studied. With a collaboration of the potential field and the asymmetric ac... Unidirectional transport of a particle in a spatially periodic and symmetric potential under a periodic force with broken temporal symmetry is studied. With a collaboration of the potential field and the asymmetric ac force, a dc current can be observed. Resonant current steps are found for a finite period of the ac force. A phase diagram of these resonant steps is given. Stochastic-resonance-like directional transport induced by thermal noises is revealed. 展开更多
关键词 RATCHET directional transport stochastic resonance
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Nonclassical Symmetries for Nonlinear Partial Differential Equations via Compatibility 被引量:8
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作者 Mostafa F.El-Sabbagh Ahmad T.Ali 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第10期611-616,共6页
The determining equations for the nonclassical symmetry reductions of nonlinear partial differential equations with arbitrary order can be obtained by requiring the compatibility between the original equations and the... The determining equations for the nonclassical symmetry reductions of nonlinear partial differential equations with arbitrary order can be obtained by requiring the compatibility between the original equations and the invariant surface conditions. The (2+1)-dimensional shallow water wave equation, Boussinesq equation, and the dispersive wave equations in shallow water serve as examples i11ustrating how compatibility leads quickly and easily to the determining equations for their nonclassical symmetries. 展开更多
关键词 nonclassical symmetriesm compatibility (2+ 1)-dimensional shallow water wave Boussinesq equa-tions and the dispersive wave equations in shallow water
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The Second mKdV Equation and Its Hereditary Symmetry and Hamiltonian Structure
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作者 YAO Yu-Qin LIU Yu-Qing JI Jie CHEN Deng-Yuan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第1期22-24,共3页
The isospectral problem of the second mKdV equation is found out firstly. It follows that the strong hereditary symmetry and the Hamiltonian structure of the second mKdV equation are presented.
关键词 the second mKdV equation hereditary symmetry Hamiltonian structure
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An Effective Method for Seeking Conservation Laws of Partial Differential Equations
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作者 QIN Mao-Chang MEI Feng-Xiang FAN Gui-Hong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第1X期21-22,共2页
This paper introduces an effective method for seeking local conservation laws of general partial differential equations (PDEs). The well-known variational principle does not involve in this method. Alternatively, th... This paper introduces an effective method for seeking local conservation laws of general partial differential equations (PDEs). The well-known variational principle does not involve in this method. Alternatively, the conservation laws can be derived from symmetries, which include t/he symmetries of t/he associated linearized equation of t/he PDEs, and the adjoint symmetries of the adjoint eqUation of the PDEs. 展开更多
关键词 conservation law partial differential equation adjoint symmetry
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Noether Symmetry Can Lead to Non-Noether Conserved Quantity of Holonomic Nonconservative Systems in General Lie Transformations 被引量:4
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作者 LUOShao-Kai JIALi-Qun CAIJian-Le 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2期193-196,共4页
For the holonomic nonconservative system, by using the Noether symmetry, a non-Noether conserved quantity is obtained directly under general infinitesimal transformations of groups in which time is variable. At first,... For the holonomic nonconservative system, by using the Noether symmetry, a non-Noether conserved quantity is obtained directly under general infinitesimal transformations of groups in which time is variable. At first,the Noether symmetry, Lie symmetry, and Noether conserved quantity are given. Secondly, the condition under which the Noether symmetry is a Lie symmetry under general infinitesimal transformations is obtained. Finally, a set of nonNoether conserved quantities of the system are given by the Noether symmetry, and an example is given to illustrate the application of the results. 展开更多
关键词 holonomic conservative system noether symmetry non-Noether conservedquantity general inifinitesimal transformations of groups
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The Topic of Contact Zone Problems in the Shaft and Hole Joint, Taking into Account Component Form Errors
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作者 Marian Dudziak Andrzej Kabala Andrzej Kolodziej 《Journal of Mechanics Engineering and Automation》 2013年第9期586-590,共5页
In assemblies constructed from components manufactured with radial deviations, cross-section deviations and deviations being combination of both, there occur variable values of local stresses and displacements. Both t... In assemblies constructed from components manufactured with radial deviations, cross-section deviations and deviations being combination of both, there occur variable values of local stresses and displacements. Both the types of shape deviations and their values need to be taken into account in the designing process and play an important role during machine operation. They have a crucial effect on the value and scatter of maximum reduced von Mises stresses and contact stresses. Axisymmetric joints were examined, in which shafts in selected shape variants and in variable angular positions were associated with a non-deformable hole. The aspects of contact zone problems are presented using the example of numerical simulation of contact between an elliptical saddle-shaped shaft placed in a rigid, non-deformable hole in different angular positions. Occurrence of both variable relative stresses and contact stresses as well as shaft's axial shift and rotary movement resistance were demonstrated. 展开更多
关键词 Form deviations static analysis by finite element method axisymmetric joints.
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Exact Solutions of(2+1)-Dimensional HNLS Equation
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作者 郭爱林 林机 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第9期401-406,共6页
In this paper, we use the classical Lie group symmetry method to get the Lie point symmetries of the (2+1)-dimensional hyperbolic nonlinear Schr6dinger (HNLS) equation and reduce the (2+1)-dimensional HNLS equ... In this paper, we use the classical Lie group symmetry method to get the Lie point symmetries of the (2+1)-dimensional hyperbolic nonlinear Schr6dinger (HNLS) equation and reduce the (2+1)-dimensional HNLS equation to some (1 + 1 )-dimensional partial differential systems. Finally, many exact travelling solutions of the (2+1)-dimensional HNLS equation are obtained by the classical Lie symmetry reduced method. 展开更多
关键词 (2+1)-dimensional HNLS equation classical Lie group approach the symmetry reduced method exact solution
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Noether-Type Symmetries and Associated Conservation Laws of Some Systems of Nonlinear PDEs
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作者 MEI Jian-Qin 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第3期495-498,共4页
The algorithm for constructing conservation laws of Euler Lagvange type equations via Noether-type symmetry operators associated with partial Lagrangian has been presented. As applications, many new conservation laws ... The algorithm for constructing conservation laws of Euler Lagvange type equations via Noether-type symmetry operators associated with partial Lagrangian has been presented. As applications, many new conservation laws of some important systems of nonlinear partial differential equations have been obtained. 展开更多
关键词 Lie-Backlund Noether-type symmetries conservation law coupled integrable dispersionless equations coupled wave equations
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