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荧光散漂更换主线一法
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作者 李营东 《中国钓鱼》 2001年第6期26-26,共1页
用旧线捆新线端3厘米处,一扣勒紧。再从扣处使新线折叠合并,将一枚浮子捋过扣至新线端。然后再捏着三线处继续下捋。
关键词 钓鱼 钓具 荧光散漂 主线 更换方法
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Strong Feller Property for SDEs with Super-linear Drift and Hölder Diffusion Coefficients
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作者 WANG Yanmin SHA Xiang GUO Zhongkai 《应用数学》 北大核心 2024年第4期1066-1073,共8页
In this paper,we investigate the strong Feller property of stochastic differential equations(SDEs)with super-linear drift and Hölder diffusion coefficients.By utilizing the Girsanov theorem,coupling method,trunca... In this paper,we investigate the strong Feller property of stochastic differential equations(SDEs)with super-linear drift and Hölder diffusion coefficients.By utilizing the Girsanov theorem,coupling method,truncation method and the Yamada-Watanabe approximation technique,we derived the strong Feller property of the solution. 展开更多
关键词 Super-linear drift Hölder continuous diffusion SDEs Strong Feller
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二滩水电站库区木材运动探讨
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作者 巫忠林 安学礼 《水电站设计》 1998年第2期79-84,共6页
二滩水电站木材过坝技术是该工程的一个重大研究课题,分库区流态模型试验、木材过坝联合运输机系统模型试验和木材入河条件模型试验分别进行研究。本文以库区流态模型试验为依据,对库区木材的运动、导漂设施的可行性等进行探索。
关键词 过木建筑物 散漂原木 水电站 木材运动 库区木材
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Weak solutions to one-dimensional quantum drift-diffusion equations for semiconductors
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作者 蒋卫祥 管平 《Journal of Southeast University(English Edition)》 EI CAS 2006年第4期577-581,共5页
The weak solutions to the stationary quantum drift-diffusion equations (QDD) for semiconductor devices are investigated in one space dimension. The proofs are based on a reformulation of the system as a fourth-order... The weak solutions to the stationary quantum drift-diffusion equations (QDD) for semiconductor devices are investigated in one space dimension. The proofs are based on a reformulation of the system as a fourth-order elliptic boundary value problem by using an exponential variable transformation. The techniques of a priori estimates and Leray-Schauder's fixed-point theorem are employed to prove the existence. Furthermore, the uniqueness of solutions and the semiclassical limit δ→0 from QDD to the classical drift-diffusion (DD) model are studied. 展开更多
关键词 semiconductor device quantum drift-diffusion equations existence and uniqueness exponential variable transformation semiclassical limit
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Asymptotic of the Solutions to the Initial Boundary Value Problem for the Diffusion Equations for Semiconductors 被引量:1
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作者 WANGWen-bin LIUShu-mei 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2005年第2期185-191,共7页
In this paper, we study the asymptotic behavior of the solutions to the initial boundary value problem for unipolar drift diffusion equations for semiconductors. Under the proper assumptions on doping profile and init... In this paper, we study the asymptotic behavior of the solutions to the initial boundary value problem for unipolar drift diffusion equations for semiconductors. Under the proper assumptions on doping profile and initial value, we prove that the smooth solutions to these evolutionary problems tend to the unique stationary solution exponentially as time tends to infinity. 展开更多
关键词 drift diffusion equations initial boundary value problems asymptotic behavior
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Asymptotic Behavior of Global Smooth Solution of 1-D Quasineutral Drift Diffusion Model for Semiconductors
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作者 CHEN Shou-xin HAN Xiao-sen 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第3期385-396,共12页
In this paper, we study the asymptotic behavior of globally smooth solutions of initial boundary value problem for 1-d quasineutral drift-diffusion model for semiconductors. We prove that the smooth solutions(close t... In this paper, we study the asymptotic behavior of globally smooth solutions of initial boundary value problem for 1-d quasineutral drift-diffusion model for semiconductors. We prove that the smooth solutions(close to equilibrium)of the problem converge to the unique stationary solution. 展开更多
关键词 quasineutral drift-diffusion model global existence and uniqueness asymptotic behavior
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On Global Boundedness of Solutions for the Drift-diffusion Semiconductor Equations
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作者 GUO Xiu-lan ZHANG Yu-lan LI Gong-sheng 《Chinese Quarterly Journal of Mathematics》 CSCD 北大核心 2006年第4期590-596,共7页
This paper is devoted to the mixed initial-boundary value problem for the semiconductor equations. Using Stampacchia recurrence method, we prove that the solutions areglobally bounded and positive.
关键词 drift-diffusion model semiconductor equations global boundedness stampac-chia recurrence method
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Thermo-Magneto-Electric Currents with Dynamical Magnetization Inhomogeneities
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作者 Santosh Kumar Kudtarkar 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第9期504-512,共9页
We study the effect of potential and thermal gradient induced non-equilibrium magnetization in quasi1-d itinerant magnets.A semi-phenomenological theory is employed in conjunction with the drift-diffusion model forthi... We study the effect of potential and thermal gradient induced non-equilibrium magnetization in quasi1-d itinerant magnets.A semi-phenomenological theory is employed in conjunction with the drift-diffusion model forthis study.Using the methods of non-equilibrium thermodynamics,we derive the transport currents correspondingto charge,heat,and magnetization flows in the presence of non-equilibrium magnetization textures.It is shown howtime-dependent magnetic textures give rise to charge and thermal currents even in the absence of external potential andthermal gradients through spin pumping.The presence of dynamical textures also affect the thermodynamic parametersof the system.As an application,we consider the case of a helimagnet. 展开更多
关键词 current and temperature driven spin pumping THERMOELECTRIC thermomagnetic
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INTERFERENCE CANCELLATION FOR MOBILE DISPERSIVE CHANNELS
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作者 Kazi Takpaya 《Journal of Electronics(China)》 2003年第5期371-377,共7页
A robust interference canceller for Multi-Carrier Code Division Multiple Access(MC-CDMA) using Orthogonal Frequency Division Multiplexing (OFDM) in Rayleigh fading isproposed. This interference canceller is robust in ... A robust interference canceller for Multi-Carrier Code Division Multiple Access(MC-CDMA) using Orthogonal Frequency Division Multiplexing (OFDM) in Rayleigh fading isproposed. This interference canceller is robust in the sense that it cancels Inter-Carriers Inter-ference (ICI) and is suitable for use in dispersive channels. To come up the effects of the signaldispersion, Doppler shifts and delay spreads on the performance of MC-CDMA systems over mo-bile fading channels, this interference canceller exploits the merit of the orthogonal signaling andpilot signals to evaluate the channel parameters. This interface canceller is well suited to work initerative turbo interference cancellation. 展开更多
关键词 OFDM MC-CDMA Robust interference canceller Doppler shift Delay spread Pilot signal ID iterative turbo ICI cancellation
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一种实用易做的星漂
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作者 张峰 《中国钓鱼》 2000年第3期36-36,共1页
关键词 散漂 制作方法 塑料管
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The Semiclassical Limit in the Quantum Drift-Diffusion Equations with Isentropic Pressure 被引量:6
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作者 Li CHEN Qiangchang JU 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2008年第4期369-384,共16页
The semiclassical limit in the transient quantum drift-diffusion equations with isentropic pressure in one space dimension is rigorously proved. The equations are supplemented with homogeneous Neumann boundary conditi... The semiclassical limit in the transient quantum drift-diffusion equations with isentropic pressure in one space dimension is rigorously proved. The equations are supplemented with homogeneous Neumann boundary conditions. It is shown that the semiclassical limit of this solution solves the classical drift-diffusion model. In the meanwhile, the global existence of weak solutions is proved. 展开更多
关键词 Quantum drift-diffusion Weak solution Semiclassical limit ISENTROPIC
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Analysis of the local discontinuous Galerkin method for the drift-diffusion model of semiconductor devices 被引量:6
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作者 LIU YunXian SHU Chi-Wang 《Science China Mathematics》 SCIE CSCD 2016年第1期115-140,共26页
We consider the drift-diffusion (DD) model of one dimensional semiconductor devices, which is a system involving not only first derivative convection terms but also second derivative diffusion terms and a coupled Po... We consider the drift-diffusion (DD) model of one dimensional semiconductor devices, which is a system involving not only first derivative convection terms but also second derivative diffusion terms and a coupled Poisson potential equation. Optimal error estimates are obtained for both the semi-discrete and fully discrete local discontinuous Galerkin (LDG) schemes with smooth solutions. In the fully discrete scheme, we couple the implicit-explicit (IMEX) time discretization with the LDG spatial diseretization, in order to allow larger time steps and to save computational cost. The main technical difficulty in the analysis is to treat the inter-element jump terms which arise from the discontinuous nature of the numerical method and the nonlinearity and coupling of the models. A simulation is also performed to validate the analysis. 展开更多
关键词 local discontinuous Galerkin method SEMI-DISCRETE implicit-explicit scheme error estimate semi- conductor
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Dispersal of invasive species by drifting 被引量:1
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作者 M.C. VAN RIEL G. VAN DER VELDE A. BIJ DE VAATE 《Current Zoology》 SCIE CAS CSCD 北大核心 2011年第6期818-827,共10页
Drifting can be an effective way for aquatic organisms to disperse and colonise new areas. Increasing connectivity between European large rivers facilitates invasion by drifting aquatic macroinvertebrates. The present... Drifting can be an effective way for aquatic organisms to disperse and colonise new areas. Increasing connectivity between European large rivers facilitates invasion by drifting aquatic macroinvertebrates. The present study shows that high abundances of invasive species drift in the headstream of the river Rhine. Dikerogammarus villosus and Chelicorophium cur- vispinum represented up to 90% of the total of drifting macroinvertebrates. Drift activity shows seasonal and diel patterns. Most species started drifting in spring and were most abundant in the water column during the summer period. Drift activity was very low during the winter period. Diel patterns were apparent; most species, including D. villosus, drifted during the night. Drifting macroinvertebrates colonised stony substrate directly from the water column. D. villosus generally colonised the substrate at night, while higher numbers of C. curvispinum colonised the substrate during the day. It is very likely that drifting functions as a disper- sal mechanism for crustacean invaders. Once waterways are connected, these species are no longer necessarily dependent on dispersal vectors other than drift for extending their distribution range 展开更多
关键词 AMPHIPODS INVADERS COLONIZATION DRIFT Daily rhythms Seasonal variation
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