检索结果-南通市图书馆

成都理工大学学报(自然科学版) 1986年第1期 113-114页

作者：余光明王成善

1983年8月,笔者等在西藏西部班公湖地区进行地质考察中,在班公湖蛇绿混杂堆积带中发现了一种直接覆于残留大洋壳之上的沉积物——褐土岩(umber)。它与其上的远洋沉积物和其上的蛇绿岩套中的堆积岩构成了一个连续的层序(如照片)。

关键词：蛇绿岩套 umber 洋脊玄武岩基性岩土岩

Number THEORETIC METHODS IN APPLIED STATISTICS (Ⅱ)

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1990年第3期11卷 384-395页

作者：王元方开泰 Institute of Mathematics Academia Sinica Institute of Applied Mathematics Academia Sinica

In this paper, the authors give some applications of F-uniformly distributedsequences, which are suggested in their previous paper under the same title, in experimen-tal design, experiments with mixtures, geometric pr... 详细信息

关键词： uniformly mixtures Uniform genera umber Probability deviation overlap 砂城 minimizing

ON RELATIONS BETWEEN THE COVERING Number OF A GRAPH AND ITS COMPLEMENTARY GRAPH

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1989年第14期34卷 1226-1226页

作者：张忠辅 Lanzhou Railway Institute

Let G(V, E) be a simple graph, A_T(?)VUE. A_T is called a total covering of G, if (?)x∈VUE, it holds that x∈A_T or xy∈A_T(y∈V\A_T) or x∈E, u∈A_T, v∈V\A_T, uv=x; A_T is called a minimum total covering, if|A_T~′... 详细信息

关键词： covering furthermore holds exceeding umber integer smallest greatest

FREE DEFORMATION RETRACTION IN INJECTIVE METRIC SPACES

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 1989年第2期10卷 221-226页

作者：麦结华唐云 Department of Mathematics Guangxi University NanningGuangxi China Department of Applied Mathematics Beijing Polytechnic UniversityBeijing China

In this paper the authors establish the concept of generalized ball-intersection (GBI) and prove that an injective metric space is freely contractible to its each GBI, which generalizes a result of Isbell from a point... 详细信息

关键词： intersection freely umber uniformly 二七 ordered 云一任履戈云子全

A NOTE ON GENERALIZED DERIVATION RANGES

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics 1985年第3期6卷 261-268页

作者：鲁世杰 Department of Mathematics Nanjing University China.

This paper is devoted to the generalized derivations determined by compact operatorsacting on Banach *** author introduces the concept of “family of approximatelylinearly indepedent vectors” and employs this concept to prove the following result:Let X,Y be Banach spaces,A∈B（X）,B∈B（Y）be compact *** AB has closed rangeif and only if both A and B have closed range.

关键词： devoted operators derivation satisfy invariant Berlin umber details kerA false

NEXT NEAREST NEIGHBOR EFFECT ON TETRAHEDRAL FERROUS AND OCTAHEDRAL FERRIC IRON IN CHROMITE

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 1986年第8期29卷 889-896页

作者：李哲,J.G.STEVENS Institute of Geology Academia Sinica Beijing Mssbauer Effect Data Center University of North Carolina Asheville U. S. A.

Four chromites have been studied by using Mssbauer spectroscopy. Of the spectra of four chromites studied, three spectra aro fitted to three or four Fe2+doublets in the tetrahedral A sites and one or two Fe3+doublets in the tetrahedral A sites and octahedral B sites. The fourth spectrum is fitted to one Fe3+doublet in the A sites and two Fe3+doublets in tho B sites. Constant isomer shifts of approximately 0.9 mm/s for Fe2+ions in the A sites and 0.3 mm/s for Fe3+ions in the B sites as well as gradual changing quadrupole splitting for both of the A sites and the B sites are obtained. The binomial distributions in the B sites are ealeulated. Next nearest neighbor effect is used to explain the multiple doublets caused by Fe2+ions in the A sites in the spectra of chromites Ⅰ, Ⅱ, Ⅲ and by Fe3+ions in the B sites in the spectrum of chromite Ⅳ.

关键词： tetrahedral octahedral fitted NEXT neighbor explain nearest splitting fourth umber

DISPERSED PHASE HOLDUP AND DROP SIZE DISTRIBUTION IN A ROTATING PERFORATED DISK CONTACTOR

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 1991年第1期 28-37页

作者：冯毓如裘元焘时钧 Nanjing Institute of Chemical Technolgy NanjingJiangsu

Hydrodynamic characteristics of rotating perforated disk contactor(RPDC)were studied with emulsionwater *** emulsion was dispcrsed in water and its holdup was *** effects of columndimensions and operating conditions on holdup and characteristic velocity were *** using the methodof dimensional analysis,the authors obtained two experimental correlations for estimating holdup and characteristic velocity *** size distribution was studied *** experimental results showedthat drop size distribuiion could be described by upper-limit log-normal distribution.

关键词： rotating estimating emulsion umber rotor dispersed photograph eliminate DISTR dimensions

SOME TRACE FORMULAS FOR THE SCHRDINGER EQUATION WITH ENERGY-DEPENDENT POTENTIAL

在线全文

学校读者我要写书评

暂无评论

数学物理学报 1985年第2期 233-242页

作者：曹策问庄大蔚 Dept.of Math. Zhengzhou Univ. Zhengzhou China Beijing Univ. Beijing China

The importance of the inverse scattering problem for the Schrdinger equation with energy-dependent potential: has been noticed by quite a few authors. Jaulent and Miodek have used it to solve some nonlinear evolution equations with isospectral condition ξ_t=0. Li and Zhuang have further made use of (1) to expand the solvable class of nonlinear evolution equations. Several physical problems in absorption media can be reduced to the inverse scattoring problem of(1) (see [4]).

关键词： inverse solvable noticed expand latter Zhuang umber satis iterated infinity

ENUMERATION OF CERTAIN SETS OF PERMUTATIONS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1984年第12期29卷 1583-1589页

作者：栾汝书 Department of Applied Mathematics Qinghua University Beijing

Ⅰ. INTRODUCTION Let Zn = {1, 2, …, n}, and Pn be the set of n. permutations π = a1a2…an of *** define the following conditions （ⅰ）—（ⅲ）:

关键词： umber subset permutation 了公 satisfying substitute genera 内凡 pointed 全一

A METHOD OF IDENTIFYING THE ABSORPTION LINE SYSTEMS IN HIGH REDSHIFT QSOs' SPECTRA

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1983年第12期28卷 1632-1638页

作者：崔振兴陈建生唐小英卞毓麟邹振隆 Beijing Observatory

Ⅰ. INTRODUCTION From the studies of the absorption lines in the spectra of the high redshift QSOs, the fact has been established that a very high percentage of the lines shortward of the Lα emission cannot be identi... 详细信息

关键词： searching umber satis uniformly answer FILT false 石弓 labeled 成口