初中数学教材习题的比较研究——以北师版与苏科版“勾股定理”章节为例A Comparative Study of Exercises in Junior Middle School Mathematics Textbooks—The Chapter “Pythagorean Theorem” in the BNUP and the JPSP as an Example
张进科, 杨 祺
理论数学Vol.14 No.6, 全文下载: PDF HTML XML DOI:10.12677/pm.2024.146222, June 11 2024
探究客户集中度与企业社会责任的关系Exploring the Relationship between Customer Concentration and Corporate Social Responsibility
陈 珊
电子商务评论Vol.13 No.2, 全文下载: PDF HTML XML DOI:10.12677/ecl.2024.132088, May 7 2024
中考路上的“勾股树”与“赵爽弦图”The “Pythagorean Tree” and “Zhao Shuang’s String Diagram” in the Middle School Entrance Examination
王晓美, 余 霞, 边 红 国家自然科学基金支持
理论数学Vol.13 No.11, 全文下载: PDF HTML XML DOI:10.12677/PM.2023.1311329, November 13 2023
基于变分贝叶斯隐马尔科夫模型的股票价格指数预测Prediction of Stock Price Index Based on Variational Bayesian Hidden Markov Model
安海钰, 侯 文
应用数学进展Vol.12 No.3, 全文下载: PDF HTML XML DOI:10.12677/AAM.2023.123117, March 23 2023
2015年股灾前后沪深300股指期现货相互关系实证分析Empirical Analysis of the Relationship between Futures and Spot of CSI 300 Stock Index before and after the Stock Market Crash in 2015
黄雪花
可持续发展Vol.12 No.6, 全文下载: PDF HTML XML DOI:10.12677/SD.2022.126201, November 30 2022
内蒙古中北部大(暴)雪的分布及其与东亚冬季风关系Distribution of Heavy Snow and Its Relation with East Asian Winter Monsoon in North-Central Inner Mongolia
王学强, 孟雪峰, 王澄海 国家自然科学基金支持
气候变化研究快报Vol.8 No.3, 全文下载: PDF HTML XML DOI:10.12677/CCRL.2019.83033, May 14 2019