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AlphaGo Zero 的計算量

AlphaGo Zero 論文裡有提到,用同樣的硬體 (4 TPU) 可以用 89:11 碾壓 AlphaGo Master (今年年初與柯潔下的那個版本),主要是得力於更高品質的 neural network 以及更強的選擇能力 (後面這塊應該是將兩個 nerual network 簡化為一後的好處):

This neural network improves the strength of the tree search, resulting in higher quality move selection and stronger self-play in the next iteration.

那麼對應的問題就會冒出來了,究竟 DeepMind 花了多少時間才能訓練出這個新的 nerual network?結果吳毅成教授在 Facebook 上先估算出來了:

這邊的 TPU 對 GPU 的推估應該是基於當時 Google 在說明 TPU 的部份「An in-depth look at Google’s first Tensor Processing Unit (TPU)」:

In short, we found that the TPU delivered 15–30X higher performance and 30–80X higher performance-per-watt than contemporary CPUs and GPUs.

用 GPU 大約是 12K 顆,反推回 TPU 大約也是千顆這個數量左右。而這個數量以目前已經將 TPU 商用化的 Google 來看應該是很輕鬆,只能說有錢真好 XD:

1. 從另外一個角度看, DeepMind 僅40天就可以把 40-block 版本練起來, 換算一下, DeepMind 等於用了約12000顆 1080 Ti.

Windows 將引入 TruePlay,推出作弊偵測的 API

在「Windows now includes gaming cheat detection at the system level」這邊看到微軟將會引入 TruePlay (然後跟 Sonostrueplay 衝名 XDDD) 作弊偵測機制。

很明顯的會有隱私問題,而也很明顯的微軟說不會有隱私問題:

As Microsoft notes, "to protect customer privacy, no data is shared or transmitted until permission is granted," and no information is sent until "processing has determined cheating is likely to have occurred."

這不是把人當傻子嗎,遊戲一開始就會要求你同意才能玩啊,所以資料一定會送出的啊... 而且 TruePlay 變成作業系統的標準配備後,作弊程式就會找 workaround 才會推出 :o

YouTube 史上第一個破四十億次播放的影片:Despacito

前幾天 2017/10/11 達到了:「Luis Fonsi & Daddy Yankee's 'Despacito' Is First Clip to Hit 4 Billion Views on YouTube」。


出自「Gangnam Style (music_video)」這頁。

不到一年的時間 XD

依照這個速度,應該是下個月會破 UINT_MAX (4294967295)?當年 YouTube 的人有在 Google+ 上發了一則關於超過 INT_MAX 的 PR 稿 (不過後來刪除了):「Gangnam Style overflows INT_MAX, forces YouTube to go 64-bit」。

所以這次會發嗎?

Google Chrome 支援 APNG 了...

翻資料的時候才發現 Google Chrome 從 59 版 (今年六月進 stable channel) 就支援 APNG 了,這樣所有主流瀏覽器只剩下微軟家的 IE 與 Edge 還沒支援了:

找了一下當時的新聞:「Chrome 59 will fully support animated PNGs」,以及對應的 ticket:「Request for enhancement: APNG (animated PNG)」。

APNG 相較於 GIF 多了透明的設計 (GIF 需要拿一個顏色來當作透明),以及更多的色彩,但對於瀏覽器的支援一直都不完整:

The GIF file format has better application and browser support than APNG, but it is limited to 256 colors per frame and supports only index transparency, by mapping one of the palette colors to transparent.

現在這樣讓 GIF 退休的日子又前進了一大步...

Facebook 也參戰參與 StarCraft 的 AI 測試,只是成績不太好...

Facebook 也參與了 StarCraft 的 AI 測試,不過成績不太好:「Facebook Quietly Enters StarCraft War for AI Bots, and Loses」。

不過跟 DeepMind 投入的項目不太一樣,Facebook 投入的是 StarCraft,DeepMind 投入的是 StarCraft II...

比賽有二十八組,Facebook 拿下第六名,但前三名都只是獨立愛好者:

Final results released Sunday indicate Facebook still has a way to go: CherryPi finished sixth in a field of 28; the top three bots were all made by lone, hobbyist coders.

不太像認真要玩...

Netflix 在美國漲價

Okay,所以 Netflix 在美國的價錢漲了:「Netflix Is Increasing Its Monthly Subscription Cost」。

基本版不變:

The basic streaming plan, which only allows for streaming on only one screen at a time, will remain at $7.99 a month.

雙螢幕版漲 $1 變成 $10.99:

The company’s most popular plan — which allows customers to stream titles on two devices with a single account — will increase by $1 to $10.99 a month.

四螢幕版漲 $2 變成 $13.99:

The premium plan — which allows customers to use the same account for four screens at once — will increase by $2 to $13.99 a month.

紐約時報的說明是因為自製成本增加,如果是這樣的話,其他地區也應該有可能會找機會漲?

The price hike arrives as Netflix continues to increase production of original TV and movie content. The company said that by the end of the year it will have spent around $6 billion for original content in 2017. In August, Ted Sarandos, Netflix’s chief content officer, told Variety that the company planned to spend about $7 billion for original programming next year.

星海爭霸 II 官方的 AI Workshop

Blizzard 公佈了在十一月的月初將會舉辦星海二的 AI Workshop:「Announcing the StarCraft II AI Workshop」。

On November 3 and 4, Blizzard and DeepMind will co-host the StarCraft II AI Workshop at the Hilton Anaheim hotel, next to the Anaheim Convention Center.

官方 (包括 DeepMind 團隊) 也會針對 SC2LE (Starcraft II Learning Environment) 與 SC2API (StarCraft II API) 提供交流:

Engineers and researchers from Blizzard and DeepMind will also be on-hand to meet with attendees and answers questions about the SC2LE and SC2API.

然後時間會跟 BlizzCon 2017 重疊 (目前看起來是卡到最後兩天),票是不能通用的:

While this event takes place during BlizzCon 2017, it is considered a separate event and is not part of the official BlizzCon program – therefore BlizzCon badges will not grant access to the AI workshop. However, we will be providing a limited pool of shareable BlizzCon badges that attendees of the AI workshop can use to check out BlizzCon and catch the StarCraft II Global Finals for inspiration on how to build superior AIs!

接下來應該會有不少消息出來... DeepMind 團隊的開發進度有可以跟頂尖選手競賽嗎?

imgproxy:自動處理圖片的工具

看到「imgproxy: Resize your images instantly and securely」這篇文章,介紹「DarthSim/imgproxy」這個專案,想起很久以前的同事在 PIXNET 弄的 *.pimg.tw 系列服務...

imgproxy 可以 resizing,也可以 croping,然後也支援 signature token 機制,感覺是每個大一點的站台都會自己刻一次的服務 XD

整個專案以 Golang 為主,效能應該是不錯... 不過一般前面還是會放 cache 機制 (像是 CDN 之類的服務),而不會把 loading 直接打進來,避免同樣的圖片一直重複計算。

用 Xbox 控制器操控潛艇

拿民用品當作軍事器材不是第一次了,不過拿來操作潛艇倒是蠻值得看一下的:「The U.S. Navy's most advanced submarines will soon be using Xbox controllers」。


在 lab 環境測試的畫面。

原因頗簡單,就是成本考量,而且很容易取得:

The company says the photonic mast handgrip and imaging control panel that cost about $38,000 can be replaced with an Xbox controller that typically costs less than $30.

不過有個問題啊,軍用品一般都可以抵抗 EMP,這種民用品應該不行吧 XDDD

歐盟對於盜版是否帶來傷害的研究

歐盟在 2014 年做了關於盜版與銷量的研究,結果一直被壓到最近才發表出來 (於是就大概可以猜到結論了...):「EU Piracy Report Suppression Raises Questions Over Transparency」。

“In general, the results do not show robust statistical evidence of displacement of sales by online copyright infringements,” the study notes.

甚至:

The study found that piracy had a slightly positive effect on the videogames industry, suggesting that those who play pirate games eventually become buyers of official content.

另外也描述了現有電影與 TV-series 定價策略偏高:

“Overall, the analysis indicates that for films and TV-series current prices are higher than 80 per cent of the illegal downloaders and streamers are willing to pay,” the study notes.

難怪被壓著...

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