user unknown 中文意思是什麼
user unknown
解釋
查無此人-
What distributors don t take into account is that running services like apache with their default settings intact - unknown to the user - is open season for crackers and script kiddies
這些發行版沒有考慮到的是毫不更改其預設設置來運行服務，如apache - -用戶毫不知情- -會讓黑客和利用腳本搗亂的人趁虛而入。 -
In this paper, chroma dc coefficients are selected as the carrier data because chroma dc coefficients are robust. also, alterable steps are used to select one part of the coefficients, so the watermark is imperceptible ; before watermark embedding, the watermark is divided into many parts, every part is individually embedded into one gop of the video, even if a gop is destroyed, the watermark can be extracted correctly, this methods promotes the robustness of the watermark ; in addition, in order to promote the security of the watermark, the user ' s id and password are used to generate chaos sequence by the chaos system which is created in this paper, later, watermark is mixed by the chaos sequence. also, the embedding position of the watermark bit is modified by one chaos sequence, so, unauthorized person can not extract or remove the watermark, since the embedding position is unknown
本文認為，色度dc系數是魯棒性非常好的參數，因而選擇色度dc系數作為水印信息載體，同時，採用可變的步長選擇部分系數，保證了水印的隱形性；在嵌入水印時，本文採用水印信息「網格劃分」 、各子塊獨立嵌入視頻的方案，由於水印信息子塊是相對獨立的嵌入視頻中的每一相對獨立的圖組當中，即使某一圖組收到一定破壞，也能夠恢復水印信息，使水印的健壯性得到提高；此外，為了提高水印信息的安全性，在嵌入水印信息時，根據用戶輸入的id號和密碼，利用本文構造的混沌系統產生的混沌序列對水印信息進行變換，同時，對每一水印信息比特的嵌入位置也採用了偽隨機序列進行調整，這樣，未授權用戶不能提取水印信息，也難以擦除其中的水印信息，因為嵌入的位置是未知的。 -
Connection error, where login failed due to unknown user name or bad password
連接錯誤，由於未知用戶名或密碼錯誤導致登錄失敗 -
Logon failure : unknown user name or bad password.
登錄失敗:用戶名未知或密碼錯誤。 」 -
When a page is running in user scope, the unknown user - scope values are supplied if available rather than unknown shared - scope values
當頁在用戶范圍中運行時，則提供未知的用戶范圍值（如果可用）而不是未知的共享范圍值。 -
Ignore that the end certificate the user certificate revocation is unknown when determining certificate verification
確定證書驗證時，忽略最終證書（用戶證書）吊銷未知的情況。
分享友人