[图片,资料,感慨] 平均脸:个性与共性,组合预测之谜 forecast combination puzzle
一、一些“平均脸”
图1 各国 fotonoticia_20141226165738_1200.jpg
https://img.europapress.es/fotoweb/fotonoticia_20141226165738_1200.jpg
图2 中国女明星平均脸
https://wx4.sinaimg.cn/mw690/00313wfYly1hxsd72hdxfj60kg0qhgsv02.jpg
https://weibo.com/2764013814/PaNpC0PDd
图3 美国人 62139de72866f1385cb7e5a3_mo.png
https://assets-global.website-files.com/5f84d3d5415f111a338e33a9/62139de72866f1385cb7e5a3_mo.png
https://www.wibg.com/blog/is-there-even-such-a-thing-as-an-average-american
图4 德国人
图5 法国人
图6 俄罗斯人
图7 日本
https://petapixel.com/assets/uploads/2018/08/05_Faces_of_fashion_JAPAN-800x800.jpg
https://petapixel.com/2018/08/06/the-average-faces-of-vogue-cover-models-from-around-the-world/
图8 英国
https://petapixel.com/assets/uploads/2018/08/07_Faces_of_fashion_UK-800x800.jpg
https://petapixel.com/2018/08/06/the-average-faces-of-vogue-cover-models-from-around-the-world/
二、个性、共性
共性包含于一切个性之中,无个性即无共性。假如除去了一切个性,还有什么共性呢?
三、组合预测:简单平均法
simple combinations of point forecasts are repeatedly found to outperform sophisticated weighted combinations in empirical applications.
在实证应用中,人们反复发现点预测的简单组合优于复杂的加权组合。
doi: 10.1111/j.1468-0084.2008.00541.x
看来,“简单平均”是一种优势啊!
参考资料:
[1] 平均脸,整容词汇,百度百科
https://baike.baidu.com/item/%E5%B9%B3%E5%9D%87%E8%84%B8/2920605
平均脸是一个整容专业词汇,指经过计算机技术处理得到的某一群体的合成性容貌。长着平均脸的一群人在很大程度上有着相似的相貌,使出现撞脸的机会大大增加。
[2] 沪江法语,2022-07-06,世界各国「平均脸」颜值咋都这么高?!你能分清哪个是法国吗…
[3] Fstoppers, 2013-09-20, The Average Faces of Women Around the World
https://fstoppers.com/portraits/average-faces-women-around-world-2944
[4] PetaPixel, 2024-06-19, The Average Faces of Women Around the World
https://petapixel.com/average-faces-of-women/
[5] PetaPixel, 2018-08-06, The Average Faces of Vogue Cover Models Around the World
https://petapixel.com/2018/08/06/the-average-faces-of-vogue-cover-models-from-around-the-world/
[6] SMITH J, WALLIS K F. A simple explanation of the forecast combination puzzle[J]. Oxford Bulletin of Economics and Statistics, 2009, 71(3): 331-355.
doi: 10.1111/j.1468-0084.2008.00541.x
相关链接:
[1] 2025-04-17 22:50,[往日(21), 优先权]:多年前已经完成,但一直没有发表的部分研究结果
https://blog.sciencenet.cn/blog-107667-1482422.html
[2] 2021-02-03 14:48,往日(4):组合预测之谜 forecast combination puzzle
https://blog.sciencenet.cn/blog-107667-1270404.html
[3] 2016-03-07 20:28,关于时间序列的“组合预测之谜 forecast combination puzzle”
https://blog.sciencenet.cn/blog-107667-961080.html
[4] 2012-05-28 21:34,综合预测、组合预测
https://blog.sciencenet.cn/blog-107667-575951.html
[5] 2024-7-9 22:42,往日(20):“线性模型稳健性”2023-06-16 终于正式出现
https://blog.sciencenet.cn/blog-107667-1441611.html
[6] 2022-12-25 20:34,往日(17):小忆“线性模型的稳健性”
https://blog.sciencenet.cn/blog-107667-1369135.html
[7] 2021-08-30 18:03,[小感想] 线性模型的稳健性与全误差计算
https://blog.sciencenet.cn/blog-107667-1302103.html
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