Now showing items 1-20 of 2622

• 求解超越方程的相交弦方法 ﻿

(1982-05-01)
<正> 文[1]给出了求解超越方程的多种方法,其中Newton-Raphson法、弦截法和Muller法为最常用,它们在实用上各有优缺点。为获得更好方法,[2]中提出了称为平行弦法的改进程序,它不必计算导数值而具有2阶速率,因此优于其它方法。
• DATA FROM TEMPERATURE-PROGRAMMED DESORPTION (TPD) TO CHECK NEW ASPECTS OF AMMONIA-SYNTHESIS ON IRON CATALYSTS 1 THE TPD OF ADSORBED HYDROGEN ON IRON CATALYSTS AND ACTIVE STATES ﻿

(ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS, 1983)
The temperature-programmed desorption spectra of hydrogen on K2OCaO OAl2O3Fe, CaOAl2O3Fe, Al2O3Fe catalysts at normal atmospheric pressure and various temperatures have been obtained. Desorption peaks are observed ...

(1983)

(1983)
• DATA FROM TEMPERATURE-PROGRAMMED DESORPTION (TPD) TO CHECK NEW ASPECTS OF AMMONIA-SYNTHESIS ON IRON CATALYSTS 1 THE TPD OF ADSORBED HYDROGEN ON IRON CATALYSTS AND ACTIVE STATES ﻿

(1983)
The temperature-programmed desorption spectra of hydrogen on K2OCaO OAl2O3Fe, CaOAl2O3Fe, Al2O3Fe catalysts at normal atmospheric pressure and various temperatures have been obtained. Desorption peaks are observed ...
• 解抛物型方程的一族绝对稳定的差分格式 ﻿

(1983-06-30)
<正> 本文提出一族求解抛物型方程的三层含参数差分格式,能在随意选取非负有限参数偶的情形下保持稳定,且截断误差至少可达0(Δt~2)+0(Δx~4)(特殊情况下还可提高)。这族格式概括了[1]及[2]中的部分结果。

(1985)

(1985)
• PERFECT MATCHINGS IN HEXAGONAL SYSTEMS ﻿

(1985)
A simple algorithm is developed which allows to decide whether or not a given hexagonal system has a perfect matching (and to find such a matching). This decision is also of chemical relevance since a hexagonal system is ...
• 不计算导数值的高阶迭代类 ﻿

(1985-07-02)
<正> 在[1]中按迭代函数(简记I.F.)所需要的信息对I.F.做了分类。并给出了I.F.阶的定义。 但[1]中所讨论的高阶迭代过程,除了需要使用函数的信息外,还需要函数导数信息的支持,这在应用上有时是不方便的(例如,导数的表达式较复杂),因此有必要研
• HAMILTON CYCLES IN EULER TOUR GRAPH ﻿

(1986)
In this paper we define the Euler tour graph of an Eulerina graph by K-transformations, which was introduced by Kotzig in 1966 (in “Theory of Graphs” (P. Erd&#246;s and G. Katona, Eds.), Proc., Colloq., Tihany, Hungary, ...
• HAMILTON CYCLES IN DIRECTED EULER TOUR GRAPHS ﻿

(1987)
In this paper we define the directed Euler tour graph of a directed Eulerian graph by T-transformations, which was introduced by Xia-Xin-guo in 1984, and prove that any edge in a directed Euler tour graph is contained in ...
• BCK-代数的理想的两点注记’ ﻿

(《福建师范大学学报》自然科学版, 1987-06)
本文说明了BKC-代数的两个理想生成的理想, 生成的子代数和这两个理想之并的包含关系, 指出黄骏敏同志的一篇文章中的几个不妥之处, 并解答了该文提出的一个问题
• 平面有理Bézier曲线的凸性 ﻿

(1987-12-27)
本文给出平面n次有理Bezier曲线凸性定理的证明及有关三次有理Bezier曲线凸性的充要条件.

(1988)
• Z-TRANSFORMATION GRAPHS OF PERFECT MATCHINGS OF HEXAGONAL SYSTEMS ﻿

(1988)
Let H be a hexagonal system. We define the Z-transformation graph Z(H) to be the graph where the vertices are the perfect matchings of H and where two perfect matchings are joined by an edge provided their symmetric ...
• 微机与色谱仪的联用 ﻿

(厦门大学学报自然科学版, 1988-05)
本文建立的联机系统能对色谱数据自动采集和处理,求出各个色谱峰面积、保留时间、各化学成分的含量等参数;编制的程序可算出乙烯环氧化催化剂的活性、选择性等数据。

(1989)
• 关于Bezier-Durrmeyer积分算子的点态逼近度 ﻿

(厦门大学学报（自然科学版）, 1989-11)
文中利用概率论的方法讨论Bezier-Durrmeyer积分算子对有界变差函数类BV[0,1]的点态逼近度，给出精确的逼近阶
• 半环的J-根 ﻿

(《福建师范大学学报》自然科学版, 1989-12)
本支对半环引进J-根的概念, 给出了其半模的刻划, 证明了它是一个根性同时讨论了由J(A)导出的环K(J(A))与由半环A导出的环K(A)的Jacobson根J(K(A))的关系