path expression 中文意思是什麼

path expression 解釋
路徑表達式
  • path : path（ol ）＝pathological; pathology n （pl paths ）1 （自然踏成的）路；路徑；（馬路邊上的）人行...
  • expression : n 1 表現，表示，表達。2 詞句；語句，措辭，說法。3 表情，臉色，態度；腔調，聲調。4 【數學】式，符...
  1. Third, this dissertation analyzes the complicacy of result size estimation problem for xml structure based query optimization compared to its counterpart in traditionally relational database, and proposes a full - featured result size estimation algorithm for xml query, sxm. for simple path expression query, this dissertation proposes a dynamic synopsis model for xml data based on the concept of f - stable and b - stable, xmap. for complicated path expression query, this dissertation adopts an improved bifocal sampling method for result size estimation

    第三，分析了xml結構化查詢優化中的查詢代價估計問題與傳統關系型數據庫中的查詢代價估計問題的區別，提出了一套完整的xml結構化查詢代價估計體系sxm ，包括對簡單路徑表達進行查詢代價估計的動態xml數據統計模型xmap ，對復雜路徑表達進行查詢代價估計的雙焦點例舉法，以及對值匹配條件進行查詢代價估計的基於小波的多維直方圖方法，並能將多種查詢表達的查詢代價估計結果結合在一起，以給出一個完整的xpath查詢的代價估計。
  2. There are 38 pieces of outdoor notice board exhibited, they are correspondent with the natural site atmosphere, as well as the formation of creative arts expression, hence providing a special visual path to the passing audients, in order to stimulate those audients ' inner self - reflection and as well as developing them an uncommon view to natural environment

    三十八件展出的戶外布告欄形式，對應著周遭的自然場域氣質，以極具創意的藝術表現形式與觀念手法，提供過往的觀眾一條特別的視覺路徑，藉此啟發群眾自身的內在反思狀態，及一種對自然的另類觀看處境。
  3. The coordinate system of turning polyhedron movement was selected and its vector model was established by way of analyzing the vector, and based on that, the vector expression of describing turning polyhedron movement was deduced, then the vector formula of the relative movement and the vector formula of the path of the lathe tool were built

    摘要通過矢量分析，選擇了車削多面體運動的標架，建立了車削多面體運動的矢量模型，在此基礎上給出了描述車削多面體運動的矢量表達式，建立了相對運動的矢量公式和刀尖軌跡的矢量公式。
  4. In the research of xml query language, we consider the requirement of two categories ( for data - centric and for document - centric ) of xml applications and point oat that the basic operations in xml - quey are pattem matching, selection and filtering, and result reconstfuction. the path expression and the flwr expression in xquery are typical structurs tha are comprised of these operations

    在對xml查詢語言的研究中，從以文檔為中心和以數據為中心這兩類xml應用需求的分析出發，指出xml查詢的基本操作是模式匹配、選擇過濾和結果構造， xquery中路徑（包括簡單路徑和正規路徑）表達式和flwr表達式是進行這些操作的典型結構。
  5. The thesis simplely discusses three question about content query : simple query ( also called matching ), field query and boolean query. the thesis gives five basic path query expression, namely simple regular path expression, order regular path expression, attribute regular path expression, value regular path expression and kleen closure regular path expression. the thesis summarizes four operation for the five basic regular path expression : pc operation ( parent - child ), ad operation ( ancestor - descendant ), co operation ( containment ), or operation ( order )

    在研究結構查詢技術時，本文提出了五種基本的路徑表達式，即簡單路徑表達式、含序路徑表達式、屬性路徑表達式、含值路徑表達式和kc路徑表達式，本文研究了這五種基本路徑表達式的實現方式，通過分析這五種路徑表達式的實現，筆者提出了四種針對結構信息的基本操作，即pc操作、 ad操作、 co操作和or操作。
  6. The feature of xrdb system is follow : the relation of xml element and it ' s son is keeped by relation - dictionary, as the same time the relation - dictionary keeped the element attributes, content and their corresponding in relation database. in order to get the more efficiency relation table, the dom tree of xml schema is trimed for getting orderliness xml schema. for efficiency rewrited path expression into sql, the relation dictionary keeps every xml element ' s absolute path

    Xrdb系統的主要特色有：用關系字典保存xml元素的父子關系，元素的屬性，內容以及它們對應的關系數據庫表名，列名；對xml模式的dom樹進行修剪，使xml模式整潔，從而使映射得到的關系的更合理；關系字典保存了每個元素的絕對路徑，可以快速地把路徑查詢重寫為結構化查詢； xrdb的查詢結果是原來xml文檔的文檔片段。
  7. It combines boolean algebra expression with time information to describe behavior of a digital circuit. it has made substantive progress at path sensitization, power dissipation estimation, iddt and delay fault diagnosis. theoretically, it is necessary to establish some mathematical foundation in order to define distance, limit and continuity based on boolean process

    它將布爾代數與時間結合起來，為異步性描述提供了比較形式的理論基礎，並在通路敏化、電源消耗的計算、動態電流測試方法（ i _ （ ddt ） ） 、時延故障診斷等方面取得了實質性的進展。
  8. In the query, the path expression

    在該查詢中， exist （ ）方法中的路徑表達式
  9. In this case, the xquery path expression inside the braces,

    在本例中，將對大括號中的xquery路徑表達式
  10. As we have seen in the previous chapters, we are selecting and filtering elements with either a path expression or with a flwor expression

    如同在前幾章里所看到的那樣，我們使用路徑表達式或flwor表達式來選擇和過濾元素。
  11. An xpath expression uses a path notation, like those used in urls, for addressing parts of an xml document

    Xpath表達式使用路徑表示法（與url中使用的路徑表示法類似）尋址xml文檔的各個部分。
  12. Describes xquery primary expressions, path expressions, sequence expressions, arithmetic comparison and logical expressions, xquery construction, flwor expression, conditional and quantified expressions, and various expressions on sequence types

    介紹xquery主表達式、路徑表達式、序列表達式、算術比較和邏輯表達式、 xquery構造、 flwor表達式、條件和定量表達式以及序列類型的各種表達式。
  13. Gets the collection of fields that apply as children for the xml path language xpath expression selector

    獲取應用為「 xml路徑語言」 （ xpath ）表達式選擇器的子級的域集合。 （從
  14. Main characteristics of dbxi are : 1 ) a new xml numbering scheme is adopted which enables each element in xml documents carries corresponding dtd structural information. 2 ) a path query with n elements ( or attributes ) and a predicate restriction can be implemented with only 0 or 2 structural join operations per xml document while at least n - 1 times of structural join operations are needed in xiss ( xiss is a kin xml indexing system developed by q. li and b. moon ). 3 ) for a path expression that is not complying with any paths in xml documents, dbxi can give a judgment of no answer in much shorter time than that of sphinx, xiss, etc. experimental results demonstrate that dbxi can process path expressions much faster than lore sphinx and xiss do

    Dbxi的主要特點是： 1 ）採用了新的xml編碼方法，使xml文檔中每個元素屬性的編碼攜帶了相應的dtd結構信息； 2 ）對一個由n個元素屬性組成的有一個謂詞約束的路徑表達式， dbxi處理每個xml文檔，由同類系統xiss所需的至少n - 1次結構連接運算，降低至0次或2次結構連接運算； 3 ）如果查詢路徑在待查xml文檔中不存在正確的匹配結構， dbxi能夠在比國際上的sphinx和xiss等xml索引方法較短的時間內給出無查詢結果的判斷。
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