RLW—Burgers方程的精确解

借助未知函数的变换，ＲＬＷ－Ｂｕｒｇｅｒｓ方程和ＫｄＶ－Ｂｕｒｇｅｒｓ方程化为易于求解的齐次形式的方程，从而得到ＲＬＷ－Ｂｕｒｇｅｒｓ方程和ＫｄＶ－Ｂｕｒｇｅｒｓ方程的精确解。     

关于低阶K群的若干问题

本文主要介绍了低阶Ｋ群Ｋ＿０，Ｋ＿１，Ｋ＿２及与它们相关的Ｂａｓｓ－Ｑｕｉｌｌｅｎ猜测、Ｂｉｒｃｈ－Ｔａｔｅ猜测研究的最新进展．Ｋ＿０与Ｋ＿１方面主要通过对Ｂａｓｓ～Ｑｕｉｌｌｅｎ猜测研究说明Ｋ＿０，Ｋ＿１的作用，同时也给出了一些多项式环上投射模自同构群的计算公式．在Ｋ＿２群方面，我们主要介绍了域上Ｋ＿２群，代数整数环上Ｋ＿２群以及著名的Ｂｉｒｃｈ－Ｔａｔｅ猜想．并且也给出了Ｋ＿２群一些计算方面的结果．     

关于K—极凸Banach空间

引进Ｋ－极凸Ｂａｎａｃｈ空间，证明了ＸＫ－极凸当且仅当Ｘ自反、Ｋ－严格凸且有（Ｈ）性质，得到了Ｋ－极凸空间的一些性质，并讨论了Ｋ－极凸与Ｋ－Ｋ－强光滑、Ｋ－一致凸及完全Ｋ－凸的关系。     

一类修正的Szasz—Kantorvich算子与Baskakov—Kantorovich算子的逼近定理

该文利用三对角无穷方阵修正Ｓｚａｓｚ－Ｋａｎｔｏｒｖｉｃｈ（以下简记Ｓ－Ｋ）算子与Ｂａｓｋａｋｏｖ－Ｋａｎｔｏｒｏｖｉｃｈ（以下简记Ｂ－Ｋ）算子。对于这两类修正的算子，我们得到了Ｈ．Ｈｅｒｅｎｓ和Ｇ．Ｇ．Ｌｏｒｅｅｎｔｚ型的结果以及在Ｌｐ（０）中逼近的正逆定理。     

一类修正的Szasz－Kantorvich算子与Baskakov－Kantorovich算子的逼近定理

该文利用三对角无穷方阵修正Ｓｚａｓｚ－Ｋａｎｔｏｒｖｉｃｈ（以下简记Ｓ－Ｋ）算子与Ｂａｓｋａｋｏｖ－Ｋａｎｔｏｒｏｖｉｃｈ（以下简记Ｂ－Ｋ）算子．对于这两类修正的算子，我们得到了Ｈ．Ｈｅｒｅｎｓ和Ｇ．Ｇ．Ｌｏｒｅｎｔｚ型的结果以及在Ｌｐ（０）中逼近的正逆定理。     

K-强凸性与K-强光滑性

本文引进了Ｋ－强凸性的概念，它是强凸性概念的推广．然后证明了Ｋ－强凸性与Ｋ－强光滑具有对偶性质；Ｘ为Ｋ－强光滑当且仅当Ｘ是自反且Ｋ－强凸；自反的Ｂａｎａｃｈ空间Ｘ是Ｋ－强凸当且仅当Ｘ是Ｋ－严格凸且具有（Ｈ）性质；局部Ｋ－一致凸空间是Ｋ－强凸的，从而推广了文［２－４］的结果．最后利用Ｋ－强暴露点的概念刻划了Ｋ－强光滑空间的特征，从而推广了［７］的结果．     

求解一类非线性方程的改进的平均法

本文研究确定非线性方程一致有效近似解的平均法，得到Ｂ方法（Ｋｒｙｌｏｖ－Ｂｏｇｏｌｉｕｂｏｖｍｅｔｈｏｄ）与ＫＢＭ方法（Ｋｒｙｌｏｖ－Ｂｏｇｏｌｉｕｂｏｖ－Ｍｉｔｒｏｐｏｌｓｋｉｍｅｔｈｏｄ）的改进形式，通过两个例子与多尺度方法的比较，说明改进的平均法的有效性，从而拓广了平均法的应用范围。     

Banach空间具有Banach—Saks性质的一个充分条件

本文的目标是利用凸性指标给出Ｂａｎａｃｈ空间具有Ｂａｎａｃｈ－Ｓａｋｅ性质的一个充分条件，从而推广Ｋａｎｋｕｔａｎｉ定理。     

关于广义导算子的零空间

本文讨论了两类广义导算子δＡＢ（ｘ）＝Ａｘ－ｘＢ和τＡＢ（ｘ）＝ＡｘＢ－ｘ，并给出了一些Ｋｅｒδ＾（ｎ）ＡＢ，Ｋｅｒτ＾ｎＡＢ＝ＫｅｒτＡＢ成立的充分必要条件。     

二元Bernstein－Kantororich算子的逼近性质

本文在Ｂｅｓｏｒ空间中对定义在单形Ｓ＝｛（ｘ，ｙ）｜ｘ＋ｙ｜≤１，ｘ，ｙ≥０｝上的二元Ｂｅｒｎ－ｓｔｅｉｎ－Ｋａｎｔｏｒｏｖｉｃｈ算子得到一个等价关系，同时在Ｓｏｂｏｌｅｖ空间Ｗ＿ｄ，ｐ（ｓ）中讨论其收敛的性质．     

Instructions for Authors

<正>Submission Authors must use LaTeX for typewriting,and visit our website www.actamath.com to submit your paper.Our address is Editorial Office of Acta Mathematica Sinica,Academy of Mathematics and Systems Science,Chinese Academy of Sciences,Beijing 100190,P.R.China.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

正August 10-14,2015Beijin,China The International Congress on Industrial and Applied Mathematics(ICIAM)is the premier international congress in the field of applied mathematics held every four years under the auspices of the International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists     

FRACTIONAL INTEGRALS OF THE WEIERSTRASS FUNCTIONS： THE EXACT BOX DIMENSION

The present paper investigates the fractal structure of fractional integrals of Weierstrass functions. The ezact box dimension for such functions many important cases is established. We need to point out that, although the result itself achieved in the present paper is interesting, the new technique and method should be emphasized. These novel ideas might be useful to establish the box dimension or Hausdorff dimension (especially for the lower bounds) for more general groups of functions.     

English Series

正1 Aims and Scope Acta Mathematicae Applicatae Sinica(English Series)is a quarterly journal established by the Chinese Mathematical Society.The journal publishes high quality research papers from all branches of applied mathematics,particularly welcomes those from partial differential equations,computational mathematics,applied probability,mathematical finance,statistics,dynamical systems,optimization and management science.     

CHINESE ANNALS OF MATHEMATICS SERIES B Volume 35 · 2014 TOTAL CONTENTS

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Congruences,ideals and annihilators in standard QBCC-algebras

We characterize congruence lattices of standard QBCC-algebras and their connection with the congruence lattices of congruence kernels. Work on the paper was supported by Council of Czech Government No J14/98:153100011.     

A decomposition of continuity via ideals

A new class of sets in ideal topological spaces is introduced and using these sets, a decomposition of continuity is given.      

When a compact (countably compact) set is closed. II

We obtain (a) necessary and sufficient conditions and (b) sufficient conditions for a compact (countably compact) set to be closed in products (sequential products) and subspaces (sequential subspaces) of normal spaces. As a consequence of these, sufficient conditions are obtained for (i) the closedness of arbitrary (countable) union of closed sets and (ii) the equality of the union of the closures and the closure of the union of arbitrary (countable) families of sets in these spaces. It is also shown that these results do not hold for quotients of even T ₄,-spaces.     

ASYMPTOTIC BEHAVIOR OF ECKHOFF＇S METHOD FOR FOURIER SERIES CONVERGENCE ACCELERATION

The current paper considers the problem of recovering a function using a limited number of its Fourier coefficients. Specifically, a method based on Bernoulli-like polynomials suggested and developed by Krylov, Lanczos, Gottlieb and Eckhoff is examined. Asymptotic behavior of approximate calculation of the so-called ＂jumps＂ is studied and asymptotic L2 constants of the rate of convergence of the method are computed.