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Explicit Solutions for Generalized (2+1)-Dimensional Nonlinear Zakharov-Kuznetsov Equation 被引量:9
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作者 孙峪怀 马志民 李燕 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第9期397-400,共4页
The exact solutions of the generalized (2+1)-dimensional nonlinear Zakharov-Kuznetsov (Z-K) equationare explored by the method of the improved generalized auxiliary differential equation.Many explicit analytic solutio... The exact solutions of the generalized (2+1)-dimensional nonlinear Zakharov-Kuznetsov (Z-K) equationare explored by the method of the improved generalized auxiliary differential equation.Many explicit analytic solutionsof the Z-K equation are obtained.The methods used to solve the Z-K equation can be employed in further work toestablish new solutions for other nonlinear partial differential equations. 展开更多
关键词 generalized nonlinear Zakharov-Kuznetsov equation improved generalized auxiliary differentialequation and exact solutions
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Improved frequency modeling and solution for parallel liquid-filled pipes considering both fluid-structure interaction and structural coupling 被引量:3
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作者 Xumin GUO Chunliang XIAO +3 位作者 Hui MA Hui LI Xufang ZHANG Bangchun WEN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2022年第8期1269-1288,共20页
The dynamic characteristics of a single liquid-filled pipe have been broadly studied in the previous literature.The parallel liquid-filled pipe(PLFP)system is also widely used in engineering,and its structure is more ... The dynamic characteristics of a single liquid-filled pipe have been broadly studied in the previous literature.The parallel liquid-filled pipe(PLFP)system is also widely used in engineering,and its structure is more complex than that of a single pipe.However,there are few reports about the dynamic characteristics of the PLFPs.Therefore,this paper proposes improved frequency modeling and solution for the PLFPs,involving the logical alignment principle and coupled matrix processing.The established model incorporates both the fluid-structure interaction(FSI)and the structural coupling of the PLFPs.The validity of the established model is verified by modal experiments.The effects of some unique parameters on the dynamic characteristics of the PLFPs are discussed.This work provides a feasible method for solving the FSI of multiple pipes in parallel and potential theoretical guidance for the dynamic analysis of the PLFPs in engineering. 展开更多
关键词 parallel liquid-filled pipe(PLFP) dynamic analysis improved frequency modeling and solution fluid-structure interaction(FSI) structure coupling
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Simplified Method and Improved Solution for Deriving Fifth Order Stokes Wave
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作者 Fu Yuhua Senior Engineer, China Offshore Oil Production Research Center, P. O. Box 9607, Beijing 100086 《China Ocean Engineering》 SCIE EI 1997年第4期431-440,共10页
As the solution of the two equations for determining the existing fifth order Stokes wave derived by Skjelbreia is complex and tedious, the two equations are simplified into one equation for determining d / L, i. e., ... As the solution of the two equations for determining the existing fifth order Stokes wave derived by Skjelbreia is complex and tedious, the two equations are simplified into one equation for determining d / L, i. e., f(H, T, d / L) = 0. According to this simplified method, three cases of the solution for the Skjelbreia equations have been found: one accurate solution; more than one accurate solution and no accurate solution (but there exists the optimum approximate solution in the area of satisfying Skjelbreia equations). As to the case of more than one accurate solution, the reasonable solution can be judged from the method of variational principle, by means elf which an optimum solution improved from the solution of Skjelbreia equations in the area of satisfying the original mathematical equations of non-vortex and nonlinear wave theory, i. e., the optimum fifth order Stokes wave, is given. 展开更多
关键词 fifth order Stokes wave simplified method variational principle improved solution
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AN IMPROVED MODEL FOR COMPUTING SOLUTION DYNAMICS OF NATURAL PRODUCTS WITH ^(13)C NUCLEAR MAGNETIC RELAXATION
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作者 Yan Wu YANG Ang JI Bing Lin HE Institute of Polymer Chemistry,Nankai University,Tianjin 300071Xin YAN Xiao Long XU De Hun WANG Bao Gong QIAN Wuhan Institute of Physics,The Chinese Academy of Sciences,Wuhan 430071 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第10期903-906,共4页
The fully anisotropic molecular overall tumbling model with methyl conformation jumps internal rotation among three equivalent sites is proposed,the overall tumbling rotation rates and the methyl internal rotation rat... The fully anisotropic molecular overall tumbling model with methyl conformation jumps internal rotation among three equivalent sites is proposed,the overall tumbling rotation rates and the methyl internal rotation rates of ponicidin are computed with this model from ~C relaxation parameters. 展开更多
关键词 exp RI C NUCLEAR MAGNETIC RELAXATION AN IMPROVED MODEL FOR COMPUTING solution DYNAMICS OF NATURAL PRODUCTS WITH
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Problems and Solutions Related to the Titles of Academic Papers
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作者 WANG Feng-nian 《Journalism and Mass Communication》 2014年第1期72-75,共4页
There are some problems related to the titles of academic papers, such as, titles incorresponding to the contents, and titles being too general or colloquial. It is imperative to increase the title quality of an acade... There are some problems related to the titles of academic papers, such as, titles incorresponding to the contents, and titles being too general or colloquial. It is imperative to increase the title quality of an academic paper through peer-review, or by checking grammar mistakes with computer tools. The editors should also aim to improve their academic level of knowledge. 展开更多
关键词 problems of academic paper titles principles for academic paper titles solutions of improving academic paper titles
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Spatial-temporal Evolution Analysis on Land Use Multifunctionality in the China-Vietnam Border Area
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作者 HUANG Tianneng WANG Nian 《Chinese Geographical Science》 SCIE CSCD 2022年第6期995-1012,共18页
Exploring the spatial and temporal evolution characteristics of the border land use multifunctionality(LUMF)provides insights for taking advantage of border land use and optimizing border land use policies.Based on th... Exploring the spatial and temporal evolution characteristics of the border land use multifunctionality(LUMF)provides insights for taking advantage of border land use and optimizing border land use policies.Based on the improved Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS)mode,this study identifies and evaluates the LUMFs in the China-Vietnam border area between 2000 and 2018 from the perspectives of agricultural production,social security,ecological service,landscape recreation,and national security.The results show that:1)The comprehensive land use functions in most counties and cities continued to be improved.2)The comprehensive land use function exhibits remarkable spatial divergence and aggregation characteristics.The high-value area of the agricultural production function and social security function evolves from the east to the west.In addition,the spatial evolution of ecological service function is complicated,without an obvious spatial divergence and aggregation pattern.The landscape recreation function shows different spatial differentiation characteristics in the early and middle stage,and forms a large cluster in the later stage.Finally,the spatial evolution pattern of the national security function is significant.3)Designing differentiated border land policies,improving border land use security,and establishing a long-term mechanism for ecological protection and ecological compensation can aid in optimizing the LUMF level in the border area. 展开更多
关键词 land use multifunctionality spatial-temporal evolution characteristics improved Technique for Order Preference by Similarity to an Ideal solution(TOPSIS) spatial analysis China-Vietnam border area
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Co-doping method used to improve the charge transport balance in solution processed OLEDs
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作者 HU Jun-tao WANG Peng +3 位作者 XIAO Xue HU Sheng XU Kai WANG Xiang-hua 《Optoelectronics Letters》 EI 2020年第6期423-427,共5页
In this paper, co-doping method is used to improve the current efficiency of solution-processed organic light-emitting diodes(OLEDs). By changing the ratio of two thermally activated delayed fluorescent(TADF) emitters... In this paper, co-doping method is used to improve the current efficiency of solution-processed organic light-emitting diodes(OLEDs). By changing the ratio of two thermally activated delayed fluorescent(TADF) emitters, we studied the performance of device and its mechanism. A solution processed OLED with a structure of indium tin oxide(ITO, 150 nm)/PEDOT:PSS(30 nm)/CBP:4 Cz IPN-x%:4 Cz PN-y%(30 nm)/TPBi(40 nm)/Li F(1 nm)/Al(100 nm) was fabricated. The current efficiencies of 26.6 cd/A and 26.4 cd/A were achieved by the devices with dopant ratio of 6% 4 Cz IPN:2% 4 Cz PN and 2% 4 Cz IPN:6% 4 Cz PN in emitting material layer(EML), respectively. By investigating the tendency of current density change in devices with different doping ratio, we suggested that the enhancement of the current efficiency should be due to the charge transport balance improvement induced by assist dopant in EML. 展开更多
关键词 PEDOT PSS CBP Co-doping method used to improve the charge transport balance in solution processed OLEDs
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