Results 41 to 50 of about 1,217,548 (163)

关于丢番图方程x⁴-2py²=1

四川大学学报. 自然科学版, 1979
关于丢番图方程x4-Dy2=1,D>0,且不是平方数,（1）Ljunggren,Cohn和本文作者都有过不少工作,现简述如下:1.1942年,Ljunggren证明了丢番图方程（1）最多只有二组正整数解（x,y）。2.1966年,Ljunggren证明了,当D=ρ是一个奇素数时,则丢番图方程（1）在ρ≠5,29时,没有正整数解。在ρ=5时,仅有正整数解x=3,y=4,在ρ=29时,仅有正整数解x=99,y=1820。
柯召, 孙琦
doaj  

Existence of positive solutions for second order discrete periodic boundary value problems with sign-changing Green′s function(格林函数变号时二阶离散周期边值问题正解的存在性)

Zhejiang Daxue xuebao. Lixue ban, 2022
运用锥上的不动点指数理论，讨论了格林函数变号时的二阶离散周期边值问题当λb(t)≡1时，该问题存在正解；当b：[1，n]Z→R+时，该问题不存在正解，其中f∈C(R+，R+)，k为满足的常数，λ为参数，，R+：=[0，∞)。
HUWenfeng(胡文丰), WANGJingjing(王晶晶)   +1 more
doaj   +1 more source

Unraveling Student Anxiety in EFL Classrooms in China: The Roles of the Classroom Environment and Control–Value Appraisals

International Journal of Applied Linguistics, EarlyView.
ABSTRACT In this study, control–value theory (CVT) was used to investigate how students’ perceptions of the classroom environment shape their anxiety in the context of English as a foreign language (EFL) learning through the mediating effects of control and intrinsic value appraisals.
Quan Qian, Xianhan Huang
wiley   +1 more source

The Role of Positive and Negative Emotions in Resilience Among L2 Learners: A Three Level Meta‐Analytic Review

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Second/foreign language (L2) learning is not solely a cognitive/linguistic acquisition process but includes mixed emotional experiences. Understanding how these emotional experiences relate to resilience could help our understanding of how learners navigate fluctuations in emotions when learning an L2.
Xinjie Chen, Zhenyi Zhou, Ziwei Xiao, Maisie Glofcheski, Jiaqi Jing, Amado M. Padilla   +5 more
wiley   +1 more source

立正大学と池上線 [PDF]

書誌別タイトル ...
立正大学文書館
core   +1 more source

一类超富足半群的结构

四川大学学报. 自然科学版, 2000
推广了通常的半群的强半格分解的定义 ,得到 ρG 强半格的定义 .并用 ρG 强半格分解研究了 Green关系H 分别是正则带同余、右 (左 )拟正规带同余和正规带同余的超富足半群的半格分解问题 .
孔祥智
doaj  

Existence of single and multiple positive solutions of singular boundary value problem(一类奇异边值问题正解的存在性及多解性)

Zhejiang Daxue xuebao. Lixue ban, 2017
应用Dancer全局分歧理论，研究奇异边值问题正解的存在性和多解性，其中f：[0，1]×[0，∞）→[0，∞）连续.给出了关于此类问题正解存在的充分条件，该充分条件与相应线性问题的第1个特征值有关，且所涉及的值是最优的.
YANDongming(闫东明)
doaj   +1 more source

A Latent Profile Analysis of Chinese EFL Students’ Speaking Self‐Efficacy: The Role of Gender in Predicting Profile Membership and the Association of Profiles With Speaking Proficiency

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Understanding learners’ English speaking self‐efficacy is essential for promoting effective oral communication in EFL contexts. However, variable‐centered research on English speaking self‐efficacy often overlooks heterogeneity among learners.
Cha Li, Lawrence Jun Zhang
wiley   +1 more source

关于丢番图方程x⁴-pqy²=1（Ⅱ）

四川大学学报. 自然科学版, 1980
3.方程(1)在p≡17(mod24),q≡3(mod8)或p≡5(mod24),q≡23(mod24)或p≡5(mod24),q≡3(mod8),(p/q)=1时均无正整数解.4.当D=2p时,方程(1)除开有解p=3,x=7,y=20外,无其他的正整数解.5.方程(1)在p≡3(mod4),q≡3(mod4)时无正整数解.国外,Nagell,Ljunggren,Cohn等人有过不少工作,可参看文[4]所附文献.本文用不同于前面诸文的方法,对于D=pq的情形,得到进一步的结果 ...
柯召, 孙琦
doaj  

What Contributes to Self‐Efficacy in Speaking Chinese as a Foreign Language: A Social Cognitive Perspective

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Grounded in social cognitive theory, this study investigated how high‐evidence factors jointly contribute to Chinese‐as‐a‐foreign‐language (CFL) speaking self‐efficacy. Data from 236 CFL learners in Beijing revealed a multifaceted pattern of associations.
Peijian Paul Sun, Jiayi Zhang, Yawen Wang, Lawrence Jun Zhang   +3 more
wiley   +1 more source