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常用基础元件的PCB封装库集合
1 个回复 - 177 次查看
常用基础元件的PCB封装库集合
01. 电阻、电位器、压敏电阻
- 贴片电阻(1206、0805、0603、0402)
- 直插电阻
- 电位器(3266、3314、3362、WH148)
- 压敏电阻
- 排阻(0603x2、0603x4、SIP-6 ...
2024-3-27 21:33 - 2023D - 现金交易版
Rasch学习资料及winsteps软件操作教程
87 个回复 - 24644 次查看
最近学习的国外网课关于Rasch analysis,分享一下Rasch的介绍,信效度分析,以及Winsteps的软件操作,目前正在用Rasch analysis量表的信效度数据,步骤大体是:
Wright map
Fit statistics
Rating scale (checkin ...
2016-8-31 11:22 - 佳佳098 - 计量经济学与统计软件
Steps in Commutative Algebra
1 个回复 - 248 次查看
Steps in Commutative Algebra
作者: Sharp, R. Y.
出版年: 2001-1
页数: 368
定价: $ 66.67
丛书: London Mathematical Society Student Texts
ISBN: 9780521646239
2024-3-23 05:13 - wxwpxh - 经济金融数学专区
Management, Global Edition by Stephen P. Robbins
43 个回复 - 10553 次查看
Management, Global Edition by Stephen P. Robbins
English | 19 Mar. 2015 | ISBN: 1292090200 | 720 Pages | PDF | 26.8 MB
With a renewed focus on skills and careers, the new edition of this bestselli ...
2015-11-25 15:20 - igs816 - 管理科学
In Polya's Footsteps
3 个回复 - 373 次查看
In Polya's Footsteps
作者: Ross Honsberger
出版社: The Mathematical Association of America
副标题: Miscellaneous Problems and Essays (Dolciani Mathematical Expositions)
出版年: 1997-10
页数: 32 ...
2023-10-7 05:03 - wxwpxh - 经济金融数学专区
GMM twostep报错
2 个回复 - 2346 次查看
请教一下,GMM两步估计时报错,而一步却可以。
. xtdpdsys yyy l(0/1).x1 l(0/2).(x2 x3 x4 x5 x6 x10) ye*, lags(2) twostep vce(robust)
note: year1 dropped from div() because of collinearity
note: ye ...
2020-6-10 07:14 - 阿阿贤 - Stata专版
R code:one step ahead forecast
1 个回复 - 2520 次查看
1. Download from Quandl the quarterly S&P 500 Index ranging from 1988.Q1 to 2013.Q4.[/backcolor]
2. Divide the series into the in-sample estimation window (observations up to and includ-[/backcolor]
...
2014-9-15 08:21 - glclare - 悬赏大厅