共查询到20条相似文献,搜索用时 15 毫秒
1.
张石生 《应用数学和力学(英文版)》1999,20(12):1310-1318
The purpose of this paper is to study the Mann and Ishikawa iterative approximation of solutions for m-accretive operator equations in Banach spaces. The results presented in this paper extend and improve some authors’ recent results. 相似文献
2.
ON THE CONVERGENCE PROBLEMS OF ISHIKAWA AND MANN ITERATIVE PROCESSES WITH ERROR FOR Φ-PSEUDO CONTRACTIVE TYPE MAPPINGS 总被引:1,自引:0,他引:1
Zhang Shisheng Professor 《应用数学和力学(英文版)》2000,21(1):1-12
The purpose of this paper is to introduce the concept of Φ-pseudo contractive type mapping and to study the convergence problem of Ishikawa and Mann iterative processes with error for this kind of mappings. The results presented in this paper improve and extend many authors’recent results. 相似文献
3.
Zeng Liu-chuan 《应用数学和力学(英文版)》2002,23(6):686-693
The convergence of theIshikawa iteration sequences with errors for constructing solutions of m-accretive operator equations
is characterized. Moreover, the error estimates of approximate solutions for locally Lipschitzian and m-accretive operator
equations are established.
Foundation items: the National Natural Science Foundation of China (19801023); the Teaching and Research Award Fund for Outstanding Young
Teachers in Higher Education Institutions of MOE, China
Biography: ZENG Liu-chuan (1965-), Professor 相似文献
4.
Dai Tian-min 《应用数学和力学(英文版)》2003,24(10):1134-1140
The existing various couple stress theories have been carefully restudied.The purpose is to propose a coupled Noether’s theorem and to reestablish rather complete conservation laws and balance equations for couple stress elastodynamics. The new concrete forms of various conservation laws of couple stress elasticity are derived. The precise nature of these conservation laws which result from the given invariance requirements are established. Various special cases are reduced and the results of micropolar continua may be naturally transited from the results presented in this paper. 相似文献
5.
Dai Tian-min 《应用数学和力学(英文版)》2003,24(11):1245-1252
The purpose is to reestablish rather complete surface conservation laws for micropolar thermomechanical continua from the
translation and the rotation invariances of the general balance law. The generalized energy-momentum and energy-moment of
momentum tensors are presented. The concrete forms of surface conservation laws for micropolar thermomechanical continua are
derived. The existing related results are naturally derived as special cases from the results proposed in this paper. The
incomplete degrees of the existing surface conservation laws are clearly seen from the process of the deduction. The surface
conservation laws for nonlocal micropolar thermomechanical continua may be easily obtained via localization.
Contributed by DAI Tian-min, Original Member of Editorial Committee, AMM
Foundation items: the National Natural Science Foundation of China (10072024); the Research Foundation of Liaoning Education Committee (990111001)
Biography: DAI Tian-min (1931 ~) 相似文献
6.
The controllability for switched linear systems with time-delay in controls is first investigated. The whole work contains
three parts. This is the second part. The definition and determination of controllability of switched linear systems with
single time-delay in control functions is mainly investigated. The sufficient and necessary conditions for the oneperiodic,
multiple-periodic controllability of periodic-type systems and controllability of periodic systems are presented, respectively.
Contributed by YE Qing-kai
Foundation items: the National Natural Science Foundation of China (69925307, 60274001); the National Key Basic Research and Development Program
(2002CB312200); the Postdoctoral Program Foundation of China
Biography: XIE Guang-ming (1972 ∼), Doctor (E-mail: xiegming@mech.pku.edu.cn) 相似文献
7.
The controllability for switched linear systems with time-delay in controls is first investigated. The whole work contains
three parts. This is the third part. The definition and determination of controllability of switched linear systems with multiple
time-delay in control functions is mainly investigated. The sufficient and necessary conditions for the one-periodic, multiple-periodic
controllability of periodic-type systems and controllability of aperiodic systems are presented, respectively. Finally, the
case of distinct delays is discussed, it is shown that the controllability is independent of the size of delays.
Contributed by YE Qing-kai
Foundation items: the National Natural Science Foundation of China (69925307, 60274001); the National Key Basic Research and Development Program
(2002CB312200); the Postdoctoral Program Foundation of China
Biography: XIE Guang-ming (1972≈), Doctor (E-mail:xiegming@mech.pku.edu.cn) 相似文献
8.
Periodic solution of m order linear neutral equations with constant coefficient and time delays was studied. Existence and
uniqueness of 2 T-periodic solutions for the equation were discussed by using the method of Fourier series. Some new necessary
and sufficient conditions of existence and uniqueness of 2T-periodic solutions for the equation are obtained. The main result
is used widely. It contains results in some correlation paper for its special case, improves and extends the main results
in them. Existence of periodic solution for the equation in larger number of particular case can be checked by using the result,
but cannot be checked in another paper. In other words, the main result in this paper is most generalized for (1), the better
result cannot be found by using the same method.
Foundation item: the Natural Science Foundation of Yunnan Education Committee (990002)
Biography: ZHANG Bao-sheng (1962-) 相似文献
9.
方锦暄 《应用数学和力学(英文版)》1999,20(10):1160-1166
IntroductionIn[1],XiaointroducedthenotionofprobabilisticnormofalinearoperatoronMengerprobabilisticnormedspace(briefy,MengerPN_space).Andbyusingthenotion,undertheconditionoft_normΔsatisfyingΔ(t,t)≥t(t∈(0,1]),hegaveadescriptionofboundednessoflinearope… 相似文献
10.
A kind simple postprocess procedure for classical Galerkin method for steady Navier-Stokes equations with stream function
form was presented in this paper. The main ideal was to construct an approximate interactive rule between lower frequency
components and higher frequency components by using the conception of Approximate Inertial Manifold (AIM) and a kind of new
decomposition of the true solution. It is demonstrated in this paper that this kind of postprocess Galerkin method could derive
a higher accuracy solution with lower computing efforts.
Communicated by Zhang Hongqing
Foundation item: the National Natural Science Foundation of China (19671067)
Biography: Hou Yanren(1970-) 相似文献
11.
The controllability for switched linear system with time-delay in controls was first investigated. The whole work contains
three parts. This is the first part, including problem formulation and some preliminaries. Firstly, the mathematical model
of switched linear systems with time-delay in control functions was presented. Secondly, the concept of column space, cyclic
invariant subspace and generalized cyclic invariant subspace were introduced. And some basic properties, such as separation
lemma, were presented. Finally, a basic lemma was given to reveal the relation between the solution set of a centain integral
equations and the generalized cyclic invariant subspace. This lemma will play an important role in the determination of controllability.
All these definitions and lemmas are necessary research tools for controllability analysis.
Contributed by YE Qing-kai
Foundation items: the National Natural Science Foundation of China (69925307, 60274001); the National Key Basic Reasearch and Development
Program (2002CB312200); the Postdoctoral Program Foundation of China
Biography: XIE Guang-ming (1972∼), Doctor (E-mail: xiegming@mech.pku.edu.cn) 相似文献
12.
In this paper, a new technique of state vector approach to solving damping ratios of adaptive structures is proposed, by which
the state matrix can be analytically conducted the Cholesky decomposition, providing that the mass matrix is derived by lumped
method. In this case, not only the computional accuracy is raised, but also the numerical operations are reduced. Finally,
some numerical results are presented to show that the solution method is simple and efficient.
Foundation item: the National 863 Program Foundation of China(863-2-4-4-4) 相似文献
13.
IntroductionThedynamicequationsofmotionofmultibodysystemswithconstraintsarethefollowingdifferential/algebraicequations,i.e.,E... 相似文献
14.
Weak formulation of equilibrium equations including boundary conditions of laminated cylindrical shell is presented, and thermal
stresses mixed state equation for axisymmetric problem of closed cantilever cylindrical shell is established. A unified approach
and weak solutions are obtained for closed laminated cantilever cylindrical shell of arbitrary thickness under thermal and
mechanical loadings. The equation and boundary conditions proposed in this paper are weakened, the method of this paper would
be easy to popularize in dynamics analysis of elasticity.
Foundation item: the National Natural Science Foundation of China (19392305) 相似文献
15.
Based on the theory of elastic wave propagation in saturated soil subgrade established by the author of this paper, the axisymmetric
vertical vibration of a rigid circular foundation resting on partially saturated soil subgrade which is composed of a dry
elastic layer and a saturated substratum is studied. The analysis relied on the use of integral transform techniques and a
pair of dual integral equations governing the vertical vibration of the rigid foundation is listed under the consideration
of mixed boundary-value condition. The results are reduced to the case for saturated half-space. The set of dual integral
equations are reduced to a Fredholm integral equation of the second kind and solved by numerical procedures. Numerical examples
are given at the end of the paper and plots of the dynamic compliance coefficient Cv versus the dimensionless frequency a0 are presented.
Foundation item: the National Natural Science Foundation of China (59579018)
Biography: CHEN Sheng-li (1974-) 相似文献
16.
The inverse problem for a class of nonlinear evolution equations of dispersive type was reduced to Cauchy problem of nonlinear
evolution equation in an abstract space. By means of the semigroup method and equipping equivalent norm technique, the existence
and uniqueness theorem of global solution was obtained for this class of abstract evolution equations, and was applied to
the inverse problem discussed here. The existence and uniqueness theorem of global solution was given for this class of nonlinear
evolution equations of dispersive type. The results extend and generalize essentially the related results of the existence
and uniqueness of local solution presented by YUAN Zhong-xin.
Contributed by Chen Yu-shu
Foundation item: the National Natural Science Foundation of China (Significance 199990510); the National Key Basic Research Special Foundation
of China (G1998020316); Liuhui Center for Applied Mathematics, Nankai University & Tianjin University
Biography: Chen Fang-qi (1963-) 相似文献
17.
Modeling and analysis of a coupled rigid-flexible system 总被引:1,自引:0,他引:1
IntroductionManymechanicalsystemssuchasrobotmanipulator,turbineblades,helicopterpropellerandman_madesatellitewithflexibleattachmentsarecomposedofrigidandflexiblebodies.Theyarecalledcoupledrigid_flexiblesystems.Correctpredictionsofthebehaviorofflexibl… 相似文献
18.
唐一鸣 《应用数学和力学(英文版)》1999,20(8):888-894
Inthispaper,whatwediscusbelongstoastabilityproblemaboutthesecondclasgeneralNavier_Stokesequations.Ittouchessomeimportantprobl... 相似文献
19.
The criterion for the points in the parameter space being on the stability boundary of linear Hamiltonian system depending
on arbitrary numbers of parameters was given, through the sensitivity analysis of eigenvalues and eigenvectors. The results
show that multiple eigenvalues with Jordan chain take a very important role in the stability of Hamiltonian systems.
Foundation item: the National Natural Science Foundation of China (10072012); the National Natural Science Foundation of Russia
Biography: QI Zhao-hui (1964-) 相似文献
20.
Dai Tian-min 《应用数学和力学(英文版)》2001,23(2):119-126
Problems of micropolar thermoelasticity have been presented and discussed by some authors in the traditional framework of
micropolar continuum field theory. In this paper the theory of micropolar thermoelasticity is restudied. The reason why it
was restricted to a linear one is analyzed. The rather general principle of virtual work and the new formulation for the virtual
work of internal forces as well as the rather complete Hamilton principle in micropolar thermoelasticity are established.
From this new Hamilton principle not only the equations of motion, the balance equation of entropy, the boundary conditions
of stress, couple stress and heat, but also the boundary conditions of displacement, microrotation and temperature are simultaneously
derived.
Contributed by DAI Tian-min
Foundation item: the National Natural Science Foundation of China (10072024); the International Cooperation Project of the NSFC (10011130235)
and the DFG (51520001); the Research Foundation of Liaoning Education Committee (990111001)
Biography: DAI Tian-min (1931-) 相似文献