descriptor segment 中文意思是什麼

descriptor segment 解釋
描述符段
  • descriptor : n. 【自動化】（數據處理中表示某一項目的）主字碼。
  • segment : n 1 （自然形成的）段落；斷片；部分；分節；段；節。2 【數學】（線）段；弓形。3 圓缺；球缺。4 環節...
  1. The segment descriptor entry contains both a pointer to the first byte in the associated segment represented by the base field and a 20 - bit value the limit field which represents the size of the segment in memory

    段描述符條目中包含一個指針和一個20位的值（ limit欄位） ，前者指向由base欄位表示的相關段中的第一個位元組，後者表示內存中段的大小。
  2. Since a segment descriptor is eight bytes long, its relative address inside the gdt or ldt is obtained by multiplying the most significant 13 bits of segment selector by 8

    由於一個段描述符的大小是8個位元組，因此它在gdt或ldt中的相對地址可以這樣計算：段選擇器的高13位乘以8 。
  3. As we saw earlier in the section on linux and segmentation, each segment descriptor uses same set of addresses for linear addressing, minimizing the need to use the segmentation unit to convert logical addresses to linear addresses

    前面介紹linux分段模型時已提到，每個分段描述符都使用相同的地址集進行線性尋址，從而盡可能降低使用分段單元將邏輯地址轉換成線性地址的需要。
  4. This default ldt segment descriptor is stored in the gdt

    這個默認ldt段描述符存儲在gdt中。
  5. By default it contains a null segment descriptor

    默認情況下，其中會包含一個空的段描述符。
  6. The corresponding segment descriptor stored in the gdt has following values

    存儲在gdt中的對應段描述符的值如下：
  7. Each segment descriptor is eight bytes long and represents a single segment in memory

    每個段描述符長8個位元組，表示內存中的一個段。
  8. A 13 - bit index that identifies the corresponding segment descriptor entry contained in the gdt or ldt

    一個13位的索引，用來標識gdt或ldt中包含的對應段描述符條目
  9. Each time a segment selector is loaded on to segment registers, the corresponding segment descriptor is loaded from memory into a matching non - programmable cpu register

    每次將段選擇器加載到段寄存器中時，對應的段描述符都會從內存加載到相匹配的不可編程cpu寄存器中。
  10. The ti table indicator flag that specifies whether the segment descriptor is included in gdt if the value is 0 ; if the value is 1, then the segment descriptor is included in the ldt

    Ti （ table indicator ）標志指定段描述符是在gdt中還是在ldt中，如果該值是0 ，段描述符就在gdt中；如果該值是1 ，段描述符就在ldt中。
  11. In order to detect and part the texture non - sensitive regions, this paper utilizes edge histogram descriptor ( ehd ) and scalable color descriptor ( scc ) as similarity to segment and combine the video images

    對于視頻圖像中紋理區域的檢測與劃分，本文採用了mpeg - 7中ehd和scc描述子作為相似度準則對圖像進行分割與合併。
  12. For example, if the gdt is stored at address 0x00020000 and index specified by segment selector is 2, then the address of corresponding segment descriptor is equal to 0x00020000

    例如，如果gdt存儲在地址0x00020000處，而段選擇器的index域是2 ，那麼對應的段描述符的地址就等於（ 2 * 8 ） + 0x00020000 。
  13. Descriptor, the only field that changes is type which is set to two and which defines the data segment that can be read and written

    描述符中，惟一不同的欄位就是type ，它被設置為2 ，表示將此數據段定義為可讀取和寫入。
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