form visual field 中文意思是什麼
form visual field
解釋
形視野-
A better desired ventilation form is acquired by comparing the three efficiency values. on the basis of recently materials collected in the field at home and abroad, this paper adopts two - equation turbulence model by analysis and comparison, and sets up mathematical model to study three - dimentional indoor turbulent flow. control - volume method and power - law scheme is used to discrete these differential equations. according to semi - implicit method for pressure - linked equations ( simple algorithm ), author writes a general program in c language for simulation of the velocity profile, temperature and pollution concentration distributions of indoor airflow, and the writing, the debugging and the running of the program. all are completed in microsoft visual c + + 6. 0 environment
在收集國內外在這一領域內的大量資料的基礎上，通過分析與比較，採用了k -雙方程模型來研究室內氣流的濃度分佈，建立了描寫穩態的三維紊流室內氣流濃度分佈的數學模型，採用控制容積法和冪函數分佈方案來離散微分方程組，按壓力藕合方程的半隱式法（ simple ）演算法，用c語言編寫了計算室內氣流流場和溫度場、濃度場的通用程序，並在microsoftvisualc + + 6 . 0環境下對程序進行編制、調試與運行，並對調試工作做了探討與分析。 -
This paper describes the designed and realized daqing petroleum administraive bureau oil field construction company office automation system ' s archetype and security measures of it in detail for information security and system security it has the different degree security mechwhsms from the grades of net, server, dataase, table shee and visual chart to grades of archive and local net the combination of the above secwtty controls can form an entir suit of security control thegy we have realized the control of documens delivering and receiving, electronic sea1s and documellt ' s conunot safely in this system
針對信息安全和系統安全問題，本文詳細闡述了大慶石油管理局油建公司辦公自動化系統文檔數據庫設計實現的原型及其的安全措施。從網路級、服務器級、數據庫級、表單、視圖級、一直到文檔級、域級，都不同程度上設計了安全控制，從而形成一整套安全控制機制。系統具體實現了文件發送與文件接收的安全性控制、電子印章安全性控制、文件批辦的安全控制等安全功能。
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