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In just a few minutes daily, this course will teach you how to relax and relieve stress. Even with a full schedule, you will want to make time for this!
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In just a few minutes daily, this course will teach you how to relax and relieve stress. Even with a full schedule, you will want to make time for this!
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Searching for your next vacation destination? Subscribe to Off The Beaten Path, a newsletter featuring captivating locales to help you to plan your next trip.
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With digital photographs, the art is now in creating black and white images. This course will teach you how to use Photoshop techniques to create beautiful images.
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與 Intel 在行動裝置上的策略相比,Intel ATOM 比較不具彈性,只能單方面接受 Intel 提供的選擇(編按:朕給你的,才是你的;朕不給你,你不能搶),但 ARM 則交由開發商在同一架構下,依照需求自由打造出各類產品。(編輯補充:Intel 在 IDF 2013 發表的 Quark SOC,也改為「fully synthesizable」的開放式架構了。)
▲ARM 的商業模式在於「開放」,各家廠商一起玩,才能把市場做大。
對此,Noel Hurley 認為 PC 產業下滑,其中一個原因就在於「只有 Intel 一位玩家」,所以 ARM 不會對 OEM 廠單獨使用 Cortex 或 Mali 設限。ARM 的理念是採取開放式提供技術,一旦技術導入市場讓更多合作伙伴成功,就會有更多的投資來回頭作研發,如此正向循環達到一個雙贏局面。唯有開放給所有夥伴與競爭者,不把競爭者擋在門外,讓大家只要遵循架構,硬體就能與 ARM 產品進行連結,這樣才是提升產業的最好方式。
▲Cortex A9 原為手機專用,但越來越多 OEM 廠商將其用在其他領域。
回到 Intel 最近推出的 Bay Trail 行動處理器,其可自動調整電壓與頻率的功能,等同於 ARM 在 2002 至 2003 年的 Cortex-A8 加入的 DVFS 功能;而關閉未使用的核心,也相當於 ARM 在 2009 年導入 Cortex-A9 的 Core Gating 技術。
▲Noel Hurley 認為在 SOC 技術上,ARM 領先 Intel 兩個世代。
ARM 也拿了實測數據佐證。ARM 以中階 Cortex-A7 為核心的 TCL Idol X 對決使用 Intel Atom 的 Lenovo K900,執行 Google Play 上免費的 Top 25 應用程式,其中有 9 個無法在 K900 上執行,因此圖表僅有 16 組數據。
▲點圖可放大
圖中 K900 的測試數值均為 1.00,藍色柱狀圖為 TCL Idol X 效能、綠色為功耗,可發現 Cortex-A7 核心效能與 K900 相近(藍色虛線為 TCL Idol X 整體平均效能,相當接近 1.00),但功耗只有 K900 的 40%,且 TCL Idol X 的價格僅 K900 的一半。(測試資料扣除螢幕耗電量)
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