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ev-DO

EVDO(ev-DO)實際上是三個單詞的縮寫:Evolution(演進(jìn))、DataOnly。其全稱為:CDMA20001xev-DO,是CDMA20001x演進(jìn)(3G)的一條路徑的一個階段。這一路徑有兩個發(fā)展階段,第一階段叫1xev-DO,即“DataOnly”,它可以使運營商利用一個與IS-95或CDMA2000相同頻寬的CDMA載頻就可實現(xiàn)高達(dá)2.4Mbps的前向數(shù)據(jù)傳輸速率,已被國際電聯(lián)ITU接納為國際3G標(biāo)準(zhǔn),并已具備商用化條件。第二階段叫1xEV-DV。1xEV-DV意為“DataandVoice”,它可以在一個CDMA載頻上同時支持話音和數(shù)據(jù)。
  • The concept of sustainable development has received growing recognition, but it is a new idea for m

    The concept of sustainable development has received growing recognition, but it is a new idea for many business executives. For most, the concept remains abstract and theoretical. Protecting an organization’s capital base is a well-accepted business principle. Yet organizations do not generally recognize

    標(biāo)簽: development sustainable recognition received

    上傳時間: 2014-09-04

    上傳用戶:498732662

  • The concept of sustainable development has received growing recognition, but it is a new idea for m

    The concept of sustainable development has received growing recognition, but it is a new idea for many business executives. For most, the concept remains abstract and theoretical. Protecting an organization’s capital base is a well-accepted business principle. Yet organizations do not generally recognize

    標(biāo)簽: development sustainable recognition received

    上傳時間: 2013-12-12

    上傳用戶:362279997

  • Writing Your First ASP Application ( Quick Start ) (Page 1 of 8 ) There are many tutorials out th

    Writing Your First ASP Application ( Quick Start ) (Page 1 of 8 ) There are many tutorials out there that show you how to program in ASP. Some of them are good, and some are bad. Some of them are downright terrible. In any case, you ve read a bit about ASP and now you are ready to build your first application. But where do you start? In my own experience, I have found that I find it easier to learn something if I actually work with it hands-on. Just reading a book or documentation doesn’t give you the practical knowledge you need to be able to rush off and start creating applications. In this article, I will discuss the creation of a very simple application. I will cover what the application will do, how we will approach writing it, demonstrate in code how we will do it, and discuss additional features that could be added to it. Writing Your First ASP Application ( Quick Start ) - Users On Your Website

    標(biāo)簽: Application tutorials Writing First

    上傳時間: 2015-11-05

    上傳用戶:franktu

  • if—else語句

    if—else語句,switch語句,循環(huán)結(jié)構(gòu),do-while語句,for語句, 跳轉(zhuǎn)語句

    標(biāo)簽: else

    上傳時間: 2014-01-22

    上傳用戶:zsjzc

  • 數(shù)值計算方法在C語言中的應(yīng)用 介紹了數(shù)值計算方法與計算機(jī)程序語言相結(jié)合的重要性

    數(shù)值計算方法在C語言中的應(yīng)用 介紹了數(shù)值計算方法與計算機(jī)程序語言相結(jié)合的重要性,在給出牛頓迭代公式之后,闡述了牛頓迭代法在do-while循環(huán)中的應(yīng)用,然后通過實例基于曲線梯形面積求解方法,論述了矩形法和梯形法在for循環(huán)中的應(yīng)用.最后指出:用正確的數(shù)值計算方法編寫高效的計算機(jī)程序解決復(fù)雜的實際問題應(yīng)成為當(dāng)代理工科大學(xué)生必備的基礎(chǔ)與技能

    標(biāo)簽: 數(shù)值 計算方法 C語言 中的應(yīng)用

    上傳時間: 2013-12-28

    上傳用戶:qoovoop

  • The functionality is to be designated the corresponding year reign France Thus the year, which was t

    The functionality is to be designated the corresponding year reign France Thus the year, which was the year of the zodiac. But can be designated a specific date date of the lunar calendar. Author Note : I used to do this as a commercial product development PDA calendar procedures in recent transplant PC, ... software categories : algorithm related paper from the shrimp off FO

    標(biāo)簽: year functionality corresponding designated

    上傳時間: 2014-05-28

    上傳用戶:chenxichenyue

  • The ability to write efficient, high-speed arithmetic routines ultimately depends upon your knowled

    The ability to write efficient, high-speed arithmetic routines ultimately depends upon your knowledge of the elements of arithmetic as they exist on a computer. That conclusion and this book are the result of a long and frustrating search for information on writing arithmetic routines for real-time embedded systems. With instruction cycle times coming down and clock rates going up, it would seem that speed is not a problem in writing fast routines. In addition, math coprocessors are becoming more popular and less expensive than ever before and are readily available. These factors make arithmetic easier and faster to use and implement. However, for many of you the systems that you are working on do not include the latest chips or the faster processors. Some of the most widely used microcontrollers used today are not Digital Signal Processors (DSP), but simple eight-bit controllers such as the Intel 8051 or 8048 microprocessors.

    標(biāo)簽: arithmetic high-speed ultimately efficient

    上傳時間: 2014-11-30

    上傳用戶:lizhen9880

  • C++代碼優(yōu)化.doc VC 常用數(shù)據(jù)類型總結(jié).doc VC編程經(jīng)驗匯總.doc VC++高級編程.rar VC常用源碼.doc VC中的后綴.doc 軟件開發(fā)原則和處理掉重復(fù)的代碼.do

    C++代碼優(yōu)化.doc VC 常用數(shù)據(jù)類型總結(jié).doc VC編程經(jīng)驗匯總.doc VC++高級編程.rar VC常用源碼.doc VC中的后綴.doc 軟件開發(fā)原則和處理掉重復(fù)的代碼.doc 用戶界面設(shè)計的技巧與技術(shù).doc 中小型軟件項目開發(fā).doc

    標(biāo)簽: VC 代碼

    上傳時間: 2014-12-07

    上傳用戶:zxc23456789

  • This leon3 design is tailored to the Altera NiosII Startix2 Development board, with 16-bit DDR SDR

    This leon3 design is tailored to the Altera NiosII Startix2 Development board, with 16-bit DDR SDRAM and 2 Mbyte of SSRAM. As of this time, the DDR interface only works up to 120 MHz. At 130, DDR data can be read but not written. NOTE: the test bench cannot be simulated with DDR enabled because the Altera pads do not have the correct delay models. * How to program the flash prom with a FPGA programming file 1. Create a hex file of the programming file with Quartus. 2. Convert it to srecord and adjust the load address: objcopy --adjust-vma=0x800000 output_file.hexout -O srec fpga.srec 3. Program the flash memory using grmon: flash erase 0x800000 0xb00000 flash load fpga.srec

    標(biāo)簽: Development Startix2 tailored Altera

    上傳時間: 2014-01-19

    上傳用戶:chongcongying

  • 單片機(jī)RS232/RS485串行發(fā)送實驗(雙機(jī)通訊)。 實驗步驟: (1)

    單片機(jī)RS232/RS485串行發(fā)送實驗(雙機(jī)通訊)。 實驗步驟: (1),準(zhǔn)備兩臺598K實驗機(jī),確定1號機(jī)為發(fā)送,2號機(jī)為接收; (2),當(dāng)作RS232接口實驗時,1號機(jī)和2號機(jī)的P3.0和P3.1交叉相連,且兩機(jī)共地; (3),當(dāng)作RS485接口實驗時,1號機(jī)和2號機(jī)的A、B作對應(yīng)連接,同時1,2號機(jī)的R/TEN接P1.0, P3.0接R0, P3.1接DI。 (4),先運行2號機(jī),鍵入[27]-->[EV]使2號機(jī)處于接收狀態(tài)P。,后運行1號機(jī)[26]-->[EV]使1號機(jī)處于發(fā)送狀態(tài),P。會閃爍,在1號機(jī)鍵盤上按動數(shù)字鍵,在2號機(jī)的數(shù)碼管上應(yīng)顯示對應(yīng)的數(shù)字鍵值。

    標(biāo)簽: RS 232 485 實驗

    上傳時間: 2015-11-27

    上傳用戶:thinode

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