線形動物門 的英文怎麼說
中文拼音 [xiànxíngdòngwùmén]
線形動物門
英文
nemathelminthes-
It ' s well known that the project documentations " storage and management have an very important effect on the development of all kinds of project, and as the information age is coming, network technology has been applied to this procedure gradually. this article mainly introduces the study and realization of a internet - based project documentation storage and management system which application programming frame is built with delphi6. 0 and sql server2000. based on the tcp / ip protocol, the system try to establish a c / s model with connection - oriented, dependable stream sockets and multithread technology to complete some especial data communications by networks, such as the files of project, directory of user, all self - defined commands or messages and their parameters, and so on
本文所研究的《基於internet的項目文檔存儲管理系統》通過delphi6 . 0和visualc + + 6 . 0相結合的開發平臺，結合sqlserver2000 ，將client server模式的數據庫技術和windowssocket網路通信技術進行集成，遵循tcp ip協議，同樣採用c s結構運行於internet ，通過服務器將處于各個不同物理位置的客戶機連接起來，形成一個交流平臺；其中，引入了目前國際上流行的先進的安全管理控制方法? ?角色控制理論對用戶進行權限分配，使擁有相應角色的人具有相應權限；然後系統自動根據組織部門或用戶的設立在服務器端生成相應的網路「虛擬文件櫃」 ，使擁有相應權限的人可以對相應文件櫃中的文檔進行整理；再通過多線程技術和windows套接字通信機制在tcp ip協議上實現了單個文件及目錄的傳輸。Engineering drawing has always been labeled as a practical subject. a combination of geometrical, building. mechanical and electrical drawing, it relates between theory and the picture of reality. engineering drawing will provide an accurate and complete ptcture for every object tn terms of shapes and sizes. usually, it is taught using the face - to - face teaching mode even in an odl environment. due to its nature, some students may find difficulty in imagining and interpreting the drawings. however, the availability of sophisticated technology provides the opportunity for the learning of engineering drawing to be enhanced via online. a web - based system for teaching and learning engineering drawing was developed based on a constructivism model. the web - based system is tailored for several topics of engineering drawing such as orthographic projection, sectional view, isometric and oblique drawing at the secondary level. the learning strategy consists of multiple phases beginning with introduction, concept learning, engineering drawing method, application and exercises. during introduction, students will be exposed to an overview of the topic followed by learning of specific concepts. the system provides a learning environment that allows engineering students to view objects from different angles, such as third angle projection and first angle projection as well as views of plans, side and front elevations. after learning about the concepts, students wilt be guided through the various steps in drawing methods for each topic via animations and simulations. learners are able to view any section repeatedly. examples of real application of engineering drawings were also given using graphic, animations and video. to evaluate students understanding, exercises were given at the end of each session
工程制圖一直被認為是一門實踐性學科，其整合了幾何學、建築、力學、電子制圖等，從而將理論與現實圖像聯系起來，工程制圖能為每個不同形狀、尺寸的物體提供精確的、完整的圖像.通常，即使在開放與遠程教育環境中，工程制圖的教學也是通過面對面的教學模式來進行的.由於其特殊性，一些學習者可能難以想象並解釋這些圖像.然而，尖端的技術使得可以通過在線的方式加強工程制圖的學習.研究者基於建構主義模式開發了一個面向工程制圖教學和學習的網路系統.該系統適用於幾種工程制圖，例如展開圖、刻面圖、等角圖和斜角圖.學習過程包括導論、概念學習、工程制圖方法，以及應用與練習等階段.在導論階段，系統為學習者提供了專題簡介，然後是概念學習階段.系統所提供的學習環境允許工程專業的學生從三維透視、一維透視、平面圖、側立面、正立面等不同角度來觀察物體.經過概念學習階段后，系統將引導學生通過動畫和模擬學習每個專題中制圖方法的不同步驟，學習者也能重復觀察任何剖面.另外，還通過圖像、動畫和視頻等方式展示真實的工程制圖應用案例.最後，為了評價學生的理解能力，在每部分內容後面都附有相關的練習The analysis in this paper have been verified by experiment firstly, the structure and mechanical characteristics of sliding - plug door are described in this paper. secondly, on the base of the study of the work condition and limited load, the dynamic load - time curve is created. and then the finite element model of sliding - plug door is built by using material equivalent
本文首先總結和探討了塞拉門的結構特點和力學特性；然後探討了塞拉門的極限工況，即列車交會壓力波的作用形式，建立了簡化的作用於塞拉門上的動力學載荷曲線；其次研究了復雜形狀復合材料層合板結構的建模方法，採用物理等效方式減小了計算規模，建立了復合材料門板的有限元模型，並對各種設定的載荷形式進行了數值模擬。
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