Now showing items 915-934 of 2622

• #### n- Gorenstein环上的 Gorenstein内射模(英文) ﻿

(2002-10-30)
用 Gorenstein内射模刻画了 n-Gorenstein环 .
• #### n-double图的连通性 ﻿

(2013-03-15)
设g_1=(V_1,E_1),g_2=(V_2,E_2)是两个连通图,直积(dIrECT PrOduCT)(也称为krOnECkEr PrOduCT,TEnSOr PrOduCT和CrOSS PrOduCT)g_1g_2的点集为V(g_1g_2)=V(g_1)V(g_2),边集为E(g_1g_2)={(u_1,V_1)(u_2,V_2):u_1u_2∈E(g_1),V_1V_2∈E(g_2)).简单图g的n-dOublE图d_n ...
• #### Navier-Stokes 方程的最佳非线性谱Galerkin 算法 ﻿

(西安交通大学学报, 1999-06)
提出了求解二维非定常Navier-Stokes 方程的最佳非线性谱Galerkin 算法, 分析了近似解的 一致收敛速度. 和标准的谱Galerkin 算法与非线性谱Galerkin 算法相比, 该算法具有节省计算量的 优点.
• #### Navier-Stokes-Poisson方程的弱解关于区域的连续依赖性 ﻿

(2011)
研究了可压等熵nAVIEr-STOkES-POISSOn方程的弱解与空间区域的关系.证明了有界区域Ωn(r3)上的弱解收敛到有界区域Ω上的弱解.利用空间区域的性质,可以得到一般非光滑有界的非空区域上弱解的存在性.
• #### Navier-Stokes方程的最佳非线性谱Galerkin算法 ﻿

(1999)
提出了求解二维非定常nAVIErSTOkES方程的最佳非线性谱gAlErkIn算法，分析了近似解的一致收敛速度.和标准的谱gAlErkIn算法与非线性谱gAlErkIn算法相比，该算法具有节省计算量的优点.
• #### NBU-[t0,∞)寿命分布及其冲击模型 ﻿

(兰州大学学报(自然科学版), 2000-02)
讨论了一个延迟Poisson冲击模型以产生NBU-[t0,∞)寿命分布,这个结果是对Poisson冲击产生NBU分布的推广;研究了NBU-[t0,∞)寿命分布与已有寿命分布类NBU和NBU-t0的关系,利用灾难变换证明了它在协同结构下的封闭性,同时证明NBU-[t0,∞)与NBU寿命分布的卷积仍然具有NBU-[t0,∞)性质.
• #### NBU型寿命分布在不可靠服务中的特征 ﻿

(兰州大学学报(自然科学版), 1996-04)
讨论了以寿命分布作为服务分布的服务系统中，系统不可靠和可靠两种情形下服务时间的分布性质，得出了系统不可靠时的服务时间随机大于系统可靠时的服务时间的充要条件为服务分布是ＮＢＵ型的
• #### Near periodicity and Zhukovskij stability ﻿

(2008-10)
In this paper, we prove pairwise equivalence between near periodicity, Poisson stability, recurrence and nonwandering of a point with Zhukovskij stability. In a locally compact phase space, a periodic point is nearly ...
• #### New and highly efficient methodology for screening high-yield strains of cytotoxic deacetylmycoepoxydiene (DAM) ﻿

(2011-05)
Aims: To establish a highly efficient methodology for screening high yield strains of cytotoxic deacetylmycoepoxydiene (DAM), to meet the need of research on its mechanism of anti-tumor properties and in vivo toxicity ...
• #### New examples of heavy-tailed O-subexponential distributions and related closure properties ﻿

(STAT PROBABIL LETT, 2012-03)
Let L and S denote the classes of distributions with long tails and subexponential tails respectively. Let O S denote the class of distributions with O-subexponential tails, which means the distributions with the tails ...
• #### New lower bound on the number of perfect matchings in fullerene graphs ﻿

(2001-10)
A fullerene graph is a cubic and 3-connected plane graph (or spherical map) that has exactly 12 faces of size 5 and other faces of size 6, which can be regarded as the molecular graph of a fullerene. T. Doslic  obtained ...
• #### New results on global exponential stabilization of impulsive functional differential equations with infinite delays or finite delays ﻿

(NONLINEAR ANAL-REAL, 2010-10)
This paper studies the global exponential stabilization of impulsive functional differential equations with infinite delays or finite delays by using Lyapunov functions and improved Razumikhin technique. The results obtained ...
• #### New solution and analytical techniques of the implicit numerical method for the anomalous subdiffusion equation ﻿

(SIAM J NUMER ANAL, 2008)
A physical-mathematical approach to anomalous diffusion is based on a generalized diffusion equation containing derivatives of fractional order. In this paper, an anomalous subdiffusion equation (ASub-DE) is considered. A ...
• #### Newton iterations for a non-symmetric algebraic Riccati equation ﻿

(2005-MAR-A)
The computation of the minimal positive solution of a non-symmetric algebraic Riccati equation arising in transport theory is considered. It was shown in (SIAM J Matrix Anal Appl, submitted) that this can be done via only ...
• #### NON-ISOTROPIC SINGULAR INTEGRALS AND MAXIMAL OPERATORS ALONG SURFACES OF REVOLUTION ﻿

(ELEMENT, 2013)
The authors establish the L-p-mapping properties for a class of non-isotropic singular integrals along surfaces of revolution as well as the related maximal operators, where the integral kernels are given by functions Omega ...
• #### Non-Newton filtration equation with nonconstant medium void and critical Sobolev exponent ﻿

(ACTA MATH SIN, 2004-04)
In this paper we consider the existence and asymptotic estimates of global solutions and finite time blowup of local solutions of quasilinear parabolic equation with critical Sobolev exponent and with lower energy initial ...
• #### Non-uniform B-spline curves with multiple shape parameters ﻿

(J ZHEJIANG U-SCI C, 2011-10)
We introduce a kind of shape-adjustable spline curves defined over a non-uniform knot sequence. These curves not only have the many valued properties of the usual non-uniform B-spline curves, but also are shape adjustable ...
• #### NONLINEAR ARMA MODELS WITH FUNCTIONAL MA COEFFICIENTS ﻿

(J TIME SER ANAL, 2008-09)
In the present article, we propose and study a new class of nonlinear autoregressive moving-average (ARMA) models, in which each moving-average (MA) coefficient is enlarged to an arbitrary univariate function. We first ...
• #### Nonlinear maps preserving similarity on B(H) ﻿

(LINEAR ALGEBRA APPL, 2007-04-15)
Let X be a real or complex Banach space with dimension at least 3, N-1 (X) be the family of all rank one nilpotent operators. We give the concrete form of every bijective map Phi : N-1 (X) -> N-1 (X) such that T + S is an ...
• #### Nonnegative inverse eigenvalue problems with partial eigendata ﻿

(2012-03)
In this paper we consider the inverse problem of constructing an n x n real nonnegative matrix A from the prescribed partial eigendata. We first give the solvability conditions for the inverse problem without the nonnegative ...