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Tag Archives: text
Facebook 開源的 fastText
準確度維持在同一個水準上，但是速度卻快了 n 個數量級的 text classification 工具：「FAIR open-sources fastText」。 可以看到 fastText 的執行速度跟其他方法的差距： Our experiments show that fastText is often on par with deep learning classifiers in terms of accuracy, and many orders of magnitude faster for training and evaluation. 除了 open … Continue reading
Posted in Computer, Murmuring, Programming, Science, Social, Software
Tagged classification, facebook, fasttext, gram, information, ir, retrieval, skip, text
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Twitter 宣佈要放寬 140 字限制...
好像跟當初外面傳言的不太一樣... Anyway，Twitter 宣佈放寬 140 字限制：「Coming soon: express even more in 140 characters」。 這個限制的解除一直都有傳言，不過最後出來的結果跟預期的好像不太一樣，主要是三種用法將不計算在 140 字內。分別是 reply 時的 @username、貼圖貼影片時的 url、引用 tweet 時被引用的文字。 所以並不是完全放寬 140 字限制，只是把某些計算方式放寬...
Mac 上的 Cleartext
看到 Mac 上的「Cleartext」這個軟體： A text editor that only allows the 1,000 most common words in English 限制你使用比較簡單的英文，這樣可以讓讀的人比較容易了解 (尤其是非母語的人)。 有種跟 Simple English Wikipedia 的想法很像的感覺： The project uses around 2,000 common English words, and is based on Basic English, an 850-word auxiliary … Continue reading
RFC 7763：text/markdown
Markdown 的 RFC：「The text/markdown Media Type」。 This document registers the text/markdown media type for use with Markdown, a family of plain-text formatting syntaxes that optionally can be converted to formal markup languages such as HTML. 雖然是 Category: Informational，但有個標準後是不是有機會在瀏覽器裡面原生支援？
MySQL 5.7 的 InnoDB 的全文搜尋
在「InnoDB Full-Text : N-gram Parser」這邊看到對 MySQL 5.7 InnoDB 的全文搜尋功能介紹。開頭就有很重要的說明： I’m now very happy to say that in MySQL 5.7.6 we’ve made use of the new pluggable full-text parser support in order to provide you with an n-gram parser that can … Continue reading
InnoDB 的 BLOB field 存放的方式
這邊的 BLOB field 指的包括 VARCHAR、VARBINARY、BLOB、TEXT 這些常常被拿來放大物件的類型：「Externally Stored Fields in InnoDB」。 這跟 InnoDB 存放的格式 (ROW_FORMAT) 也有關，對於不同的格式都需要分開討論。 看之前需要帶一些背景知識，像是 Database index 裡面講到 index 種類時所提到的 Clustered。 看完後對 MySQL InnoDB 的運作方式會更了解一些，對於規劃 schema 也加減有些幫助。
將 latin1 的表格轉換成 UTF-8 表格...
Percona 的人寫了一篇「utf8 data on latin1 tables: converting to utf8 without downtime or double encoding」，告訴你怎麼將 latin1 的 TEXT 欄位轉成 UTF-8，文章內有提到利用 BLOB 轉。 不確定同樣方式能不能做在 VARCHAR 上面 (用 BINARY 轉？)，但不知道會不會有 UNIQUE + prefix support 的問題？有遇到再來測試看看...