keyboard selection 中文意思是什麼

Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method

在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。

According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system

針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。

Modifying function parameter using engineer keyboard on the screen. such as, changing regulation para, on line, concept of function, selection of caculation method

用工程師鍵盤在此畫面上進行修改組態參數，如在線改變調整參數、組態信息的定義、演算法選擇等試驗。

Their thought is broken by excessive switches among selection of menu, operations on buttons and keyboard input of words. the ubiquitous computing induces the idea of new design methods and interactive technologies to aid the conceptual design, especially by incorporating the natural pen - based user interface into the design process

另一方面在交互上基於wimp方式，設計者的思路常常會被頻繁的菜單選擇、按鈕操作和鍵盤命令輸入所打斷，影響了設計意圖地自然流露，不能很好地支持概念設計過程。

When you get to keyboard selection

當您看到鍵盤選擇項

Follow the regular initial steps of the installation language, country and keyboard selection ; the loading of additional installer components

按照正常的步驟進行安裝語言國家和鍵盤選擇加載額外的安裝組件

In practical terms this means for file and network preseeding that the questions about language, country and keyboard selection will already have been asked

操作時，這意味著file和network方法仍要詢問語言國家和鍵盤選擇這些問題。

This delays questions that would normally be asked too early for preseeding i. e. language, country and keyboard selection until after the network comes up, thus allowing them to be preseeded

它延遲了預置之前出現詢問問題例如，語言國家和鍵盤選擇，直至連上網路，使它們可以進行預置。

In the chapter 2, the thesis introduces the key technologies : technology of multithreading, communication between procedures, network communication, the message simulation of mouse action and keyboard in windows 2000 system, capturing the screen of remote computer, the encoding and decoding of images and so on. these are discussed in detail : the selection of network communication protocol, the principle of winsock network programme and the important api functions

第二章介紹了本系統採用的關鍵技術:多線程技術、進程間通訊技術、網路通訊技術、 windows系統的鼠標和鍵盤消息模擬技術、屏幕抓取技術、圖像編碼和解碼技術等。同時介紹了網路通信協議的選擇、 winsock的網路編程基本原理和一些在軟體開發過程中用到的網路編程介面函數。

Text selection keyboard shortcuts

文本選擇鍵盤快捷鍵

Changing the current cell to a new row or column by using the keyboard moves the selection to the full new row or column

，通過鍵盤將當前單元格更改至一新行或新列時，會將選擇點移到整個新行或新列。