KuboLog 2003-09-17

苦情・お叱りは，たいへんお手数かけて恐縮ですが，久保 (kubo@ees.hokudai.ac.jp) までお知らせください．

2003 年 09 月 17 日 (水)

0850 起床． 0910 自宅発．曇． 0920 研究室着．コーヒー．

今日も一日うだうだとぱいぷ樹木電気盆栽．

シュートのカタチを変えたりするのはまったく 役にたたん というのをわざわざ再証明するのに夕方すぎまで費す …… われながら阿呆だ．

夜になってから，ちょっとマシになりそうな改善を思いつく．よーやく．資源配分を少しだけ明るさ依存にしてしまうのだ …… ただしこの関数型はかなり絶妙なモノでなければならない．ヘタな設定にすると昨年のごときみじめなすかすか樹冠たちのごとくなってしまうのは明らかだ．洞察と直観が必要とされそう．

[こんなかんぢか?]

必要条件としては，「ある程度あかるければ減点しない」「しかしいよいよダメな状況の末端には資源をやらない」というところか．これは 1 - exp(-c * x) な関数型を使っているが，変化がもっときついやつのほうがいいのかもしれない．

今日も計算は終らぬまま 2250 研究室発． 2300 帰宅．体重 70.8kg．晩飯．

[今日の素読]

Salsburg, D. 2001. `` The Lady Tasting Tea -- How statistics revolutionized science in the twentieth century''. Owl Book.
Chapter 14. The Mozart of Mathematics
R.A. Fisher was not the only presiding genius when it came to the development of statistical methods in the twentieth century. Andrei Nikolaevich Kolmogorov, who was thirteen years younger than Fisher and died at age eighty-five in 1987, left an imprint on mathematical statistics and probability theory that built on some of Fisher's work but that exceeds Fisher's in the depth and detail of the mathematics.
But perhaps as important as his contributions to science was the impact this remarkable man had on those who knew him. His student Albert N. Shiryaev wrote in 1991:
Andrei Nikolaevich Kolmogorov belonged to a select group of people who left one with the feeling of having touched someone unusual, someone great and extraordinary, the feeling of having met a wonder. Everything about Kolmogorov was unusual: his entire life, his school and college years, his pioneering discoveries in ... mathematics ... meteorology, hydrodynamics, history, linguistics and pedagogy. His interests were unusually diverse, including music, architecture, poetry, and travel. His erudition was unusual; it seemed as if he had an educated opinion about everything ... One's feeling after meeting Kolmogorov, after a simple conversation with him, [was] unusual. One sensed that he had a continuously intensive brain activity.

[今日の運動]

[今日の食卓]

ぎょーむ日誌 2003-09-17