virtual data connection 中文意思是什麼

virtual data connection 解釋
虛數據接續
  • virtual : adj. 1. 實際上的，實質上的，事實上的。2. 【物理學】虛像的。3. 【物理學】有效的；【計算機】（網上）虛擬的。4. 〈古語〉具有可產生某種效果之內在力的。
  • data : n 1 資料，材料〈此詞系 datum 的復數。但 datum 罕用，一般即以 data 作為集合詞，在口語中往往用單數...
  • connection : n. 〈美國〉＝connexion.
  1. Socket function mainly realizes setting up and initializing service unit socket, initializing service unit and service unit serial and so on. bind funcion primarily binds local address and port for the socket. listen function is to evaluate the max length of server ’ s listening queue. connect function and accept function set aside rate ahead, infrom user ’ s request of establishing virtual circuit to suna, cooperate with suna to establish the connection between client and server, return the result. we make use of three handshake with data protocol and virtual circuit mode, in this way, when we translate data, we can look up communication course according to virtual circuit number, at the same time, there aren ’ t source ip address and port, end ip address and port in the head of data package, the speed of translating data advances in a certain extent. send function and recv function is to send data collaborating with suna, and copy data from the receiving queue of socket to user ’ s buffer. close function cooperate

    Socket （ ）函數實現創建、初始化服務元套接字，初始化服務元及服務元序列等。 bind （ ）函數為套接字綁定本地地址和埠號。 connect （ ）和accept （ ）函數主要是根據用戶要求預留帶寬，將用戶的建立虛電路請求轉達給服務元網路體系，協作服務元網路體系採用捎帶數據的三次握手協議建立虛電路，並告訴用戶處理結果，一方面，捎帶數據的三次握手協議在一定程度上可提高數據傳輸速度;另一方面，採用虛電路方式，使得數據通信可直接根據虛電路號查找相應的通信進程，而且數據包的包頭中省去了源ip地址、埠號和目的ip地址、埠號，提高了數據傳輸速率。
  2. At last, we gave the circuit connection method of web browse function and ethernet / rs232 gateway function and the detailed resolvent to improve the results of theory research. the result indicates that it is feasible to access internet with the method of micro controlling unit and virtual software package. this method will provide a new kind of resolvent to appliance accessing intemet, long - distance controlling and long - distance data collection

    最後給出了實現網頁瀏覽功能和ethernet rs232網橋功能的實驗線路連接方法及具體實驗方案，來證明理論研究的結論。實驗結果表明採用8位微控制器與虛擬軟體包相結合的方式接入internet是完全可行的，這將為家電上網，遠程控制，遠程數據採集等提供一種新的解決方案。
  3. In the course of design, we fully consider the actual conditions on the railway and take a series of corresponding measures to the concrete problem. such as we select high - accuracy microconvertor and have the converted function in succession data collecting system chip aduc812, design v / f circuit and external a / d circuit. in anti - interference of the hardware, we try to disperse each function module to avoid interfering each other, adopt photoelectric isolated technology to dispel the circuit connection of input and output. in controlling we import arithmetic mean into strain wave algorithm and real computing technology of virtual value for sample treatment of data, that is using the software to smooth away interfere error and to calculate actual value, thus it makes the precision of the data improve greatly

    在設計過程中，根據系統要求，充分考慮鐵路上的實際情況，針對具體問題採取了一系列的相應措施，如在器件選擇方面選用高精度microconvertor系列、具有adcdma連續轉換功能的數據採集微控制器晶元aduc812 ，設計了v f變換電路和外部a d轉換電路；在硬體抗干擾方面，將每個功能模塊盡量分散獨立開來以避免相互干擾、採用光電隔離技術消除輸入輸出通道上的電路聯系；在控制方面對于采樣數據的處理引入了算術平均值濾波演算法和真有效值的計算方法，即通過使用軟體來濾除系統中有干擾造成的誤差並計算真值，從而使數據的準確性得到極大地提高。
  4. Information technology - international standardized profile tannnn - connection - mode transport service over connectionless - mode network service - ta1111 ta1121 profiles including subnetwork - dependent requirements for x. 25 packet - switched data networks using virtual calls

    信息技術.國際標準數據區tannnn .無連接模式網路服務器上面的連接模式傳輸服務器. ta1111 ta1121數據區包括用於虛擬傳呼的x . 25數據包交換數據網路的子網路相關要求
  5. On windows2000 software, this article established a virtual database system including data files, figures and video files of material processing virtual lab and built the relation of tables. at the same time, with software of windows ole db database connection was set up

    在windows2000環境下，利用office2000中的microsoftaccess軟體建立包含材料加工虛擬實驗室的數據文件及圖形和視頻文件的虛擬數據庫系統（ vdbs ） ，並建立了相應表間的關系。
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