directed line 中文意思是什麼

directed line 解釋
有向線, 定向線, 直線
  • directed : adj. 1. 有指導的；定向的。2. 【數學】標出（數、角、線段的）正負的。
  • line : n 1 線；繩索；釣絲；測深度用繩，捲尺。 a fishing line 釣魚線。 be clever with rod and line 會釣魚...
  1. In computer graphics, a directed line segment

    在計算機制圖學中，一種有方向的線段。
  2. Abstract : the continually increase in digitized information resour ces such as disc publications and on - line databases, which put forward new task s for the collection construction of library, requires that the libraries of coll eges and universities shoud reestablish the new purchase criteria for the collec tion of library and incerase the devoted proportion of the digitized information resources. directed by the new purchase criteria, the libraries should optimize t heir local collection and take full advantage of the virtual collection in compu ter network and collect and manage more efficiently the importand collection re sources in network era, network addresses and digitized publications

    文摘:光盤出版物、聯機數據庫等數字化信息資源的不斷增長，給圖書館的館藏建設提出了新的任務.這就要求高校圖書館必須重新制定館藏采購標準，適當加大數字化信息資源的投入比例，並在新的采購標準指導下，不斷優化本地館藏，充分利用計算機網路上的虛擬館藏，同時做好網路時代圖書館的重要館藏資源? ?網址及數字化出版物的收集與管理工作
  3. For a x - directed line current with lengh much smaller than a wave length, the e - field pattern on coordinate planes in 3 - d space in the region from much smaller than line length to one or two wave length, the synthesized pattern by summation of the field of many line segments of hertz dipoles is independent of the number of segments, i. e. same field as a single hertz dipole

    以水平面上三角形甚小於波長線電流為例，分割為若干小段之赫芝偶極所加總合成在三度空間任意座標平面上距離從甚大於線長到一兩個波長區域之電場場型與分割小段數量無關，即等同於一單一赫芝偶極之場型。
  4. The visualization objects include the power flow animation, each customer ' s use rate of transmission line, the power supplying paths. a novel method is developed using power flow tracing method for finding all the directed paths between two designed nodes in the directed graph with loops

    鑒于目前還沒有高效的供電路徑搜索的數值方法，發展了一種新的基於潮流跟蹤的供電路徑搜索新方法，該方法可以通過簡單的運算來獲得帶環路網路指定兩節點間的所有供電路徑。
  5. This paper adopts the thermodynamic method to on - line monitor the performance of the feed pump and on the base of the method develops the feed pump status monitoring system. the system has been applied to one power plant 2qomw unit and reached the good improvements of safety and economy for the unit operation. dai ri - jun ( feng zhen power plant ) directed by prof

    本文在充分研究給水泵效率在線監測方法和故障機理的前提下，採用熱力學法對給水泵進行性能在線監測，同時開發了狀態監測系統，並將二者合二為一，成功地應用於200mw機組的給水泵，提高了機組的運行的安全性與經濟性。
  6. Directed line segment

    有向線段
  7. Whether it had, in the past 10 years and in the capacity as the largest or the sole shareholder, directed or requested the mtr corporation limited and the kowloon - canton railway corporation " the two railway corporations " to lower their fares in line with deflation ; if it had, of the relevant details ; if it had not, the reasons for that ; and

    二過去10年，有否以其最大或唯一股東身份，指示或要求地鐵有限公司和九廣鐵路公司"兩鐵"按通縮情況調低票價如果有，請提供有關的詳情如果沒有，原因是甚麼及
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