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中央执行负荷、算式难度与形式对大学生减法估算的影响 被引量:1
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作者 张梦 刘启珍 张裕鼎 《教育教学论坛》 2016年第40期195-196,共2页
工作记忆中的中央执行抑制能力在估算加工的诸多过程中发挥着重要作用。本实验程序采用E-Prime软件编写,随机抽选43名大学生作为被试,在电脑上完成一系列三位数减法估算问题,考察工作记忆中的中央执行抑制能力、算式难度与形式对减法估... 工作记忆中的中央执行抑制能力在估算加工的诸多过程中发挥着重要作用。本实验程序采用E-Prime软件编写,随机抽选43名大学生作为被试,在电脑上完成一系列三位数减法估算问题,考察工作记忆中的中央执行抑制能力、算式难度与形式对减法估算表现的影响。结果显示:中央执行有参与减法估算的过程,在有干扰刺激的情境下,减法估算的表现较差;算式的难度对减法估算的表现有显著性影响,减法计算过程中需要的借位次数越多,估算表现越差。 展开更多
关键词 中央执行抑制能力 减法估算 算式形式 算式难度
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规律探索问题(初一、初二、初三) 被引量:1
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作者 徐鹏 《数理天地(初中版)》 2003年第12期15-16,共2页
1.从数字特征中探索规律例1 观察下面一列数的规律并填空:0,3,8,15,24,…,则它的第2002个数是__. 分析首先从题中所给的一组数中发现第n个数为n2-1这一规律,然后求出当n=2002时n2-1的值. 答案:4008003.
关键词 初一 初二 初三 初中 数学教学 算式形式 数字特征 数学规律 表格特征 图形
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Notes on the Heat Diffusion Semigroup in a Riemannian Manifold
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作者 卢克平 《Chinese Quarterly Journal of Mathematics》 CSCD 1992年第1期89-95,共7页
In this paper, the properties of the heat diffusion semigroup {e^(t△)}_(t≥0) generated by the Hodge-deRham operator in a Riemannian manifold are discussed.
关键词 Riemannian manifold Hodge-deRham operator Heat semigroup
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Conformal oscillator representations of orthogonal Lie algebras
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作者 XU XiaoPing 《Science China Mathematics》 SCIE CSCD 2016年第1期37-48,共12页
The conformal transformations with respect to the metric defining the orthogonal Lie algebra o(n, C) give rise to a one-parameter (c) family of inhomogeneous first-order differential operator representations of th... The conformal transformations with respect to the metric defining the orthogonal Lie algebra o(n, C) give rise to a one-parameter (c) family of inhomogeneous first-order differential operator representations of the orthogonal Lie algebra o(n + 2, C). Letting these operators act on the space of exponential-polynomial functions that depend on a parametric vector a^→∈ C^n, we prove that the space forms an irreducible o(n + 2, C)-module for any c ∈ C if a^→ is not on a certain hypersurface. By partially swapping differential operators and multiplication operators, we obtain more general differential operator representations of o(n+2, C) on the polynomial algebra in n variables. Moreover, we prove that l forms an infinite-dimensional irreducible weight o(n +2, C)-module with finite-dimensional weight subspaces if c Z/2. 展开更多
关键词 orthogonal Lie algebra differential operator oscillator representation irreducible module poly- nomial algebra exponential-polynomial function
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Generalized Integral Representations for Functions with Values in C(V_(3,3))
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作者 Klaus GURLEBECK Zhongxiang ZHANG 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2011年第1期123-138,共16页
By using the solution to the Helmholtz equation u-λu = 0(λ≥ 0),the explicit forms of the so-called kernel functions and the higher order kernel functions are given.Then by the generalized Stokes formula,the integra... By using the solution to the Helmholtz equation u-λu = 0(λ≥ 0),the explicit forms of the so-called kernel functions and the higher order kernel functions are given.Then by the generalized Stokes formula,the integral representation formulas related with the Helmholtz operator for functions with values in C(V3,3) are obtained.As application of the integral representations,the maximum modulus theorem for function u which satisfies Hu = 0 is given. 展开更多
关键词 Universal Clifford algebra Helmholtz equation Generalized CauchyPompeiu formula
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