一类常微分方程特征值的上界估计

考虑一类常微分方程特征值的上界估计,利用分部积分、Rayleigh定理和不等式估计等方法,获得了用前n个特征值来估计第n+1个特征值的上界的不等式,其估计系数与区间的几何度量无关,其结果在物理学和力学等领域中应用广泛.     

Visual BASIC上机实验中常见错误分析

本文结合学生上机实验的实际情况，分析了常见Visual BASIC编程错误的原因，并简述了解决方法。     

论教师间接言语行为的"纠错"策略

在英语课堂教学准确性练习中，间接纠错策略是教师常用的一个有效的语用策略。它不仅反映了教师的移情意识和对学生情感的尊重，还反映了教师互动的语言观和自主学习的学习观。     

Unequal Division of Type I Risk in Statistical Inferences

Introductory statistics texts give extensive coverage to two‐sided inferences in hypothesis testing, interval estimation, and one‐sided hypothesis tests. Very few discuss the possibility of one‐sided interval estimation at all. Even fewer do so in any detail. Two of the business statistics texts we reviewed mentioned the possibility of dividing the risk of a type I error unequally between the tails for a two‐sided confidence interval. None of the textbooks that were reviewed even considered the possibility of unequal tails for two‐sided hypothesis tests. In this paper, we propose that statistics courses and texts should cover both one‐sided tests and confidence intervals. Furthermore, we propose that coverage, at least in two semesters and advanced courses, should also be given to unequal division of the nominal risk of a type I error for both tests and confidence intervals. Examples are provided for both situations.     

Fully Discrete Nonlinear Galerkin Methods for Kuramoto-Sivashinsky Equation and Their Error Estimates

WeconsidertheKuramoto-Sivashinsky(K-S)equationinonespacedimensionwithperiodicboundaryconditionalldzero1lleantwhere110(x)isl-periodicandofzero"lean.TheK-Sequationmodelspatternformationsindifferentphysicalcontexts["3"landisaparadignloflowdimensionalbehaviou…     

抛物问题的各向异性线性三角形有限元逼近

讨论了各向异性线性三角形元的能量模和零模估计.并利用此单元求解抛物问题,得到了半离散格式和全离散格式的误差估计.     

Frame loss error concealment for SVC

INTRODUCTION Real-time transmission of video data in network environments, such as wireless and Internet, is a challenging task, as it requires coding efficiency, network friendliness and error robustness. Scalability is a possible solution for network adaptive applica- tions. The Scalable Extension of H.264/AVC (SVC) (JVT of ISO/IEC MPEG & ITU-T VCEG, 2005b) aims at achieving both high compression performance and adaptivity for video delivery over heterogeneous networks. SVC…     

编码在通信中的应用

本文论述了编码技术在通信中的应用,讨论了离散信号的编码过程中的作用,以及编码技术的保密用途和纠错功能。     

电解水实验

主要探讨电解水实验时误差产生的原因，并根据实验具体情况选择合适的实验条件，以保证实验成功，从而准确说明水的组成。