Category Archives: Tech Zone

除了AlphaGo,其實還有很多值得留意的人工智能發展。例如現在正在美國進行中的無上限德州撲克大賽,由Carnegie Mellon大學的人工智能對世界上最頂尖的人類選手進行20天的比賽。到目前為止戰況可說是一面倒向電腦一方。
和圍棋不同,德州撲克是一種有隱蔽資訊的遊戲,參賽者並不知道對手以及未派發的牌為何。因此德州撲克相比起圍棋對解決很多現實中的問題意義更大。
Texas Hold’em is a much more interesting game than Go when it comes to real-world artificial intelligence application, since many important real world issues inherently involves imperfect information. 5 days into the game and the human pros are losing badly.

Claudico battles Donger Kim, Jason Les, Bjorn Li, Doug Polk in Brains vs. AI at Rivers Casion, the first time that a computer program has played Heads-up No-limit Texas Hold’em in competition with top human players.

Source: Brains vs AI

TensorFlow and CUDA 8.0

TensorFlow up and running with CUDA 8.0. Life-saving tip: always explicitly enter your CUDA and cuDNN versions during configuration.

My first impression is TF is a bit behind Nervana Neon in terms of training speed and ease of use. Too bad the latter now belongs to Intel, which clearly wants to promote its own Pentium-based Xeon Phi over Nvidia GPU.

Screenshot 2016-08-30 02.08.53

2016-8 Micro SD Speed Test – Micro SD卡評比

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Micro SD卡大家可能都要用到,但大概因為卡的價值低,今時今日很少科技網站會做評比,有做的亦無可能做涵蓋所有品牌形號。* 我手頭上剛好有一堆新的Micro SD卡,那就來個測試比試一下那一最款最好。
 
六款參與評比的Micro SD 卡都是64GB,這容量是目前性價比最高的。所有卡都是 Class 10 U1級別,標準要求最低限速係10MB/s。測試用市面上最快之一的Transcend RNF-9 USB 3.1 讀卡器,最高讀速260MB/s。測試內容跟隨行業標準,包括Crystal Mark 3.0.4連續讀、連續寫、隨機讀及隨機寫。前兩者和後兩者分別測試讀寫大檔案及小檔案的表現。
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結果:除了三星及Silicon Power,其他廠商基本上都超越包裝紙上列出的速度。當然,包裝紙上所列的都是數字最大的連續讀取速度,但在實際應用上,隨機讀寫速度對一般用家可能更有意義。考慮到這些因素,評比的結果是:
results
最快(大檔案):Strontium Nitro
最快(小檔案):Samsung EVO
優異:Transcend Premium 400x
 
Fastest (Large files):Strontium Nitro
Fastest (Small files):Samsung EVO
Honorable mention:Transcend Premium 400x
 
說完結果,其實卡的速度是否真的那麼重要?以日常使用來說,卡的速度並不會有太顯著的分別。即使是錄影4K影片,一般都只需每秒連續寫13MB左右,以上所有卡都能應付自如。所以大家就不用想太多了,要用就買吧!
 

如果開個砌機班有無同學有興趣?由零開始,用來做計量運算或小型伺服器。當然,偶爾攞來打The Division或者Destiny亦難以避免….
Any student interested in a workshop building computers for scientific computing? If course, these rigs are perfectly capable of an occasional match of modern gaming…

係傳統銀行不斷裁員之際,計量金融是少數有增長的領域。所以我成日同同學講:一定要識程式編寫,一定要識程式編寫,一定要識程式編寫。(重要嘅嘢要講三次,好似係。)
For students interested in working in the finance field, learning how to write code is more important than ever before.

“[A]s these firms have grown, so has the demand for a new breed of Wall
Street trader — one who can build financial models and write computer code
but who also has the guts to spot a market anomaly and bet big with the firm’s capital.”

New York Times: A New Breed of Trader on Wall Street: Coders With a Ph.D.