Category Archives: Tech Zone

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…

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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.

Auto-Hiding Taskbar in Windows 10 Tablet Mode

Although there is an existing paid-app that automatically hides the taskbar in tablet mode, I wished for more functionalities. In particular, I want the taskbar to hide in landscape mode where vertical space is precious, but not in portrait mode where there is plenty of vertical space. I ended up writing a little application to get what I need.

Features of the application:

  • Auto-hide taskbar can be turned on or off independently for each combination of tablet mode and screen orientation.
  • Install for all users.
  • Free and open source.

The application can be downloaded here: http://ticoneva.com/software/

Screenshot 2015-10-17 02.28.29