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论大别山南缘襄樊―广济断裂的两次向南逆冲推覆  [PDF]
杨坤光,程万强,朱清波,李学刚
地质论评 , 2011,
Abstract: 位于大别山南缘的襄樊―广济断裂是扬子板块与大别造山带的边界断裂。大体以黄陂为界,断裂东段与西段在几何结构上有所差异:东段在地表浅层表现出向北反向逆冲,深部则以向南大规模逆掩为特征;西段浅层与深部一致,表现为典型的大型低角度叠瓦状逆冲推覆。野外地质数据、40Ar/39Ar定年、锆石U-PbLA-ICP-MS定年和沉积学资料表明,自中三叠世以来,该断裂带发生了两次明显的向南逆冲:第一次逆冲发生在中三叠世(约240~231Ma),与北界的浒湾拆离断层同时启动,响应于大别山超高压从地幔深度折返到下地壳的挤出过程;第二次逆冲发生在中―晚侏罗世(约160~140Ma),即发生在大别山白垩纪热隆伸展之前,因为伴随热隆伸展侵位的巨量花岗岩体并未卷入逆冲变形。第一次逆冲推覆以超高压折返伴随的中―高角度逆冲为特点,发生在大别造山带内部。第二次逆冲发生在造山带东部南缘,以低角度巨型逆冲推覆为特点,使大别造山带深变质岩大规模覆盖在扬子板块北缘的沉积岩之上,最大覆盖宽度大于60km。东段由于受江南古陆的准同时向北逆冲改造,在浅层形成向北逆冲的几何学结构。
煤化工炼焦推焦车自动走行控制系统的研制  [PDF]
唐一科,王久斌,谢志江
重庆大学学报 , 2003, DOI: 10.11835/j.issn.1000-582X.2003.12.009
Abstract: 研究了PLC用于煤化工炼焦推焦车走行自动控制,实现炉号识别、自动定位功能等的方、法。本系统采用PLC二进制编码原理和位置式接近传感器实现自动炉号识别;采用数字控制变频调速器驱动电机,采用AD61高速计数模块进行反馈修正位置误差,探讨了离散数字处理增量式PID控制算法进行位置误差补偿的条件,保证推焦车自动走行过程中的自动精确定位;通过RS485实现PLC与上位机的通讯和报表管理。该方法和算法研制的系统在实际的推焦车控制系统中得到成功应用。
On the Solutions of the BBM-KP and BBM model Equations  [PDF]
Jacob Grey,Michael M. Tom
Mathematics , 2014,
Abstract: It is shown that the solution of the Cauchy problem for the BBM-KP equation converges to the solution of the Cauchy problem for the BBM equation in a suitable function space whenever the initial data for both equations are close as the transverse variable $y \rightarrow \pm \infty$.
Weierstrass solutions for dissipative BBM equation  [PDF]
Stefan C. Mancas,Greg Spradlin,Harihar Khanal
Physics , 2013, DOI: 10.1063/1.4817342
Abstract: In this paper the effect of a small dissipation on waves is included to find exact solutions to the modified BBM equation. Using Lyapunov functions and dynamical systems theory, we prove that when viscosity is added to the BBM equation, in certain regions there still exist bounded traveling wave solutions in the form of solitary waves, periodic, and elliptic functions. By using the canonical form of Abel equation, the polynomial Appell invariant make the equation integrable in terms of Weierstrass $\wp$ functions. We will use a general formalism based on Ince's transformation to write the general solution of dissipative BBM in terms of $\wp$ functions, from which all the other known solutions can be obtained via simplifying assumptions. Using ODE analysis we show that the traveling wave speed is a bifurcation parameter that makes transition between different classes of waves.
The front location in BBM with decay of mass  [PDF]
Louigi Addario-Berry,Sarah Penington
Mathematics , 2015,
Abstract: We augment standard branching Brownian motion by adding a competitive interaction between nearby particles. Informally, when particles are in competition, the local resources are insufficient to cover the energetic cost of motion, so the particles' masses decay. In standard BBM, we may define the front displacement at time $t$ as the greatest distance of a particle from the origin. For the model with masses, it makes sense to instead define the front displacement as the distance at which the local mass density drops from $\Theta(1)$ to $o(1)$. We show that one can find arbitrarily large times $t$ for which this occurs at a distance $\Theta(t^{1/3})$ behind the front displacement for standard BBM.
EXPLICIT EXACT SOLUTIONS OF GENERALIZED B-BBM AND B-BBM EQUATIONS
推广的B-BBM方程和B-BBM方程的显式精确解

CHEN SONG-LIN,HOU WEI-GEN,
陈松林
,侯为根

物理学报 , 2001,
Abstract: The deformation theory for the solutions of BBM equation and generalized B-BBM equation and homogenous balance methods(HBM) for B-BBM equation are studied. The authors propose a new class of deformation formula which can produce the exact explicit solutions of generalized B-BBM equation by deforming the known solution of BBM equation. This paper concludes with an elementary example. As a byproduct, another class of deformation relation(called hybrid) is obtained.
变系数bbm方程的精确解  [PDF]
朱明星,卢殿臣
江苏科技大学学报(自然科学版) , 2008,
Abstract: ?通过推广的f-展开法研究了变系数bbm(benjamin,bonaandmahony)方程的精确解,通过线性变换将变系数bbm方程约化为标准椭圆方程形式,由标准方程的行波解的结构求出原方程的解,从而得到了变系数bbm方程丰富的精确解.同时研究了解随参数的变化而变化的情况.
Chebyshev Pseudospectral Method for Higher Dimensional Generalized BBM Equations
高维广义BBM方程的Chebyshev拟谱方法

向新民,张法勇
计算数学 , 1991,
Abstract: In this paper, higher dimensional generalized BBM equations are considered. AChebyshev pseudospectral scheme is constructed for the equations and the error isestimated.
New exact solitary wave solutions to the BBM and mBBM equations
BBM方程和修正的BBM方程新的精确孤立波解

Taogetusang,Sirendaoreji,
套格图桑
,斯仁道尔吉

物理学报 , 2004,
Abstract: In this paper, several new exact solitary wave solutions to the BBM and the m BBM equations are constructed explicitly by combined use of a hyperbolic functio n assumption and a new auxiliary ordinary differential equation. This method also can be used to find new solitary wave solutions to other nonlinear evolution equ ations.
Exact Solutions for the Generalized BBM Equation with Variable Coefficients
Cesar A. Gómez,Alvaro H. Salas
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/498249
Abstract: The variational iteration algorithm combined with the exp-function method is suggested to solve the generalized Benjamin-Bona-Mahony equation (BBM) with variable coefficients. Periodic and soliton solutions are formally derived in a general form. Some particular cases are considered.
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