CSNG-I 伽馬能譜，自然伽馬能譜圖，U，Th，K
標(biāo)簽： CSNG-I 伽馬能譜
上傳時(shí)間： 2015-04-13
上傳用戶：longge
We introduce a sub-cell WENO reconstruction method to evaluate spatial derivatives in the high-order ADER scheme. The basic idea in our reconstruction is to use only r stencils to reconstruct the point-wise values of solutions and spatial derivatives for the 2r-1 th order ADER scheme in one dimension, while in two dimensions, the dimension-by-dimension sub-cell reconstruction approach for spatial derivatives is employed. Compared with the original ADER scheme of Toro and Titarev (2002) [2] that uses the direct derivatives of reconstructed polynomials for solutions to evaluate spatial derivatives, our method not only reduces greatly the computational costs of the ADER scheme on a given mesh, but also avoids possible numerical oscillations near discontinuities, as demonstrated by a number of one- and two-dimensional numerical tests. All these tests show that the 5th-order ADER scheme based on our sub-cell reconstruction method achieves the desired accuracy, and is essentially non-oscillatory and computationally cheaper for problems with discontinuities.
標(biāo)簽： 高精度格式
上傳時(shí)間： 2016-01-13
上傳用戶：ccsdcczd
Following chapter introduces the mobile communication, gives a short history of wireless communication evolution, and highlights some application scenarios predestined for the use of mobile devices. Cellular and wireless based systems related to different generations of mobile communication, including GSM, IS-95, PHS, AMPS, D-AMPS, cdma2000 and WCDMA are also described by this Chapter. Much attention in this chapter is given to express the wireless based networks, such as Wi-Fi and WiBro/WiMax, and wireless broadcasting systems, including DMB, DVB-H, and ISDB-T. We conclude the chapter with the future vision of mobile communication evolution
標(biāo)簽： Technologies Enhanced Access Radio
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE, Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n), wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a comprehensive introduction to the basic theory and practice of wireless channel modeling, OFDM, and MIMO, with MATLAB ? programs to simulate the underlying techniques on MIMO-OFDMsystems.Thisbookisprimarilydesignedforengineersandresearcherswhoare interested in learning various MIMO-OFDM techniques and applying them to wireless communications.
標(biāo)簽： Communications MIMO-OFDM Wireless MATLAB with
上傳時(shí)間： 2020-05-28
上傳用戶：shancjb
Do you have a mobile phone? We think you probably do, one way or another. We would also guess that you might use it for many diff erent things in the course of your everyday life—as a telephone certainly, but also as an address book, as a clock or watch, as a camera, or now as a connection to your computer, email and the internet. Th ere will be a range of people you use it to contact (or not), and various strategies you use to take calls—or send texts, or take photos, or receive emails, or search online (or not, in diff erent situations). Th ere are also likely to be a range of social relation- ships in your life that your mobile phone helps to maintain—or disrupts, or inter- venes in, or makes possible, or complicates, or just plain helps to handle.
標(biāo)簽： Communications Introduction Mobile Media New An to
上傳時(shí)間： 2020-05-30
上傳用戶：shancjb
LTC2756 18位乘法串行輸入電流輸出數(shù)模轉(zhuǎn)換器DAC模塊ALTIUM原理圖+PCB文件，硬件4層板設(shè)計(jì)，大小為66mmx39mm，ALTIUM設(shè)計(jì)的工程文件，包括完整的原理圖和PCB文件，可以做為你的設(shè)計(jì)參考。 原理圖器件列表： Library Component Count : 14 Name Description ---------------------------------------------------------------------------------------------------- AD8397ARDZ Imported Capacitor CAP.,1uF,X74,10V,10%,1206 Header 10X1 2.54 Header, 100mil, 2x1_1Header, 100mil, 2x1, Tin plated, TH Header, 100mil, 3x1 Header, 100mil, 3x1, Tin plated, TH KJDZ-2 快接端子 LT1012 LT1012 LT1360 LT1360 LTC2054_1 LTC2054 LTC2756AIG LTC2756AIG LTC6244 Imported LTC6655 LTC6655 Resistor RES.,1K OHMS,5%,1/16W,0603 SMA-KE CONNECTOR, SHEILDED, END LAUNCH JACK, GOLD PLATED, FOR 0.062 PCB, EDGE MOUNTED
標(biāo)簽： 數(shù)模轉(zhuǎn)換器
上傳時(shí)間： 2021-12-22
上傳用戶：
因此，您想編寫一個(gè)內(nèi)核模塊。您知道C，您已經(jīng)編寫了一些可以作為進(jìn)程運(yùn)行的常規(guī)程序，現(xiàn)在您想知道真正的動(dòng)作在哪里，一個(gè)通配指針可以擦掉文件系統(tǒng)，核心轉(zhuǎn)儲(chǔ)意味著重新啟動(dòng)。內(nèi)核模塊到底是什么？模塊是可以根據(jù)需要加載和卸載的代碼段。它們擴(kuò)展了內(nèi)核的功能，而無需重新引導(dǎo)系統(tǒng)。例如。模塊驅(qū)動(dòng)程序的一種類型是設(shè)備驅(qū)動(dòng)程序，它允許內(nèi)核訪問沒有模塊的系統(tǒng)硬件，我們將不得不構(gòu)建單片內(nèi)核并將新功能直接添加到內(nèi)核映像中，除了具有更大的內(nèi)核之外，這還具有缺點(diǎn)每次我們想要新功能時(shí)都要求我們重建并重新啟動(dòng)內(nèi)核的過程So, you want to write a kernel module. You know C, you, ve written a few normal programs to run as processes, and now you want to get to where the real action is, to where a single wild pointer can wipe out your file system and a core dump means a reboot.What exactly is a kernel module? Modules are pieces of code that can be loaded and unloaded into th upon demand. They extend the functionality of the kernel without the need to reboot the system. For example.one type of module is the device driver, which allows the kernel to access hardware connected to the syste without modules, we would have to build monolithic kernels and add new functionality directly into the em ernel image, Besides having larger kernels
標(biāo)簽： linux
上傳時(shí)間： 2022-03-30
上傳用戶：
基于Proteus仿真前言：本文詳細(xì)介紹了DS18B20原理，并在后面舉例說明了其在單片機(jī)中的應(yīng)用，所舉例子包含Proteus仿真電路圖，源程序，程序注釋詳細(xì)清楚。1、DS18B20簡介：DS18B20溫度傳感器是DALLAS公司生產(chǎn)的1-wire式單總線器件，具有線路簡單，體積小的特點(diǎn)，用它組成的溫度測量系統(tǒng)線路非常簡單，只要求一個(gè)端口即可實(shí)現(xiàn)通信。溫度測量范圍在一55℃~+125℃之間，分辨率可以從9~12位選擇，內(nèi)部還有溫度上、下限報(bào)警設(shè)置。每個(gè)DS18B20芯片都有唯一的序列號(hào)，所以可以利用多個(gè)DS18B20同時(shí)連接在同一條總線上，組成多點(diǎn)測溫系統(tǒng)。但最多只能連接8個(gè)，如果數(shù)量過多，會(huì)使供電電源電壓過低，從而造成信號(hào)傳輸?shù)牟环€(wěn)定。2、DS18B20結(jié)構(gòu)：如右圖所示，DS18B20有三只引腳，VCC、DQ和GND。DQ為數(shù)字信號(hào)輸入/輸出端（DQ一般接控制器（單片機(jī)）的一個(gè)1/0口上，由于單總線為開漏所以需要外接一個(gè)4.7K的上拉電阻）；GND為電源地；VDD為外接供電電源輸入端（在寄生電源接線方式時(shí)接地）。DS18B20內(nèi)部結(jié)構(gòu)主要由四部分組成：64位光刻ROM、溫度傳感器、非揮發(fā)的溫度報(bào)警觸發(fā)器TH和TL、配置寄存器。光刻ROM中的64位序列號(hào)是出廠前被光刻好的，它可以看作是該DS18B20的地址序列碼。64位光刻ROM的排列是：開始8位是產(chǎn)品類型標(biāo)號(hào)，接著的48位是該DS1B20自身的序列號(hào)，最后8位是前面56位的CRC校驗(yàn)碼（循環(huán)冗余校驗(yàn)碼）。光刻ROM的作用是使每一個(gè)DS18B20都各不相同，這樣就可以實(shí)現(xiàn)一根總線上掛接多個(gè)DS18B20的目的。溫度傳感器可完成對(duì)溫度的測量，以12位轉(zhuǎn)化為例，用16位符號(hào)擴(kuò)展的二進(jìn)制補(bǔ)碼讀數(shù)形式提供。
上傳時(shí)間： 2022-07-02
上傳用戶：
VIP專區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（91）資源包含以下內(nèi)容：1. 非常 好用的模擬選通開關(guān).2. 移植到ARM s3c2410平臺(tái)的g722音頻編解碼庫和測試程序。.3. ACM-12864漢字液晶顯示驅(qū)動(dòng)程序.4. A MPEG4 encoder, suit for ARM decode IP camera solution.5. Chipcon RF chip, CC1020 參考設(shè)計(jì)..6. TFT屏LTV350QV-F04的程序.7. RD800讀卡器開發(fā)包.8. 0781@52RD_Qt嵌入式圖形開發(fā)（入門篇.9. 新建文件夾!!!!!!!數(shù)電大實(shí)驗(yàn)!!!!!!!!!!2001介紹.10. 飲水機(jī)測溫度原代碼 用匯編語言寫超過溫度可以報(bào)警.11. 用C語言寫的鍵盤掃描可以實(shí)現(xiàn)加減盛除的功能的計(jì)算器上面有電路圖.12. 用C語言寫的電子時(shí)鐘可以準(zhǔn)確的讀出時(shí)間和進(jìn)行時(shí)間小時(shí)分鐘秒的設(shè)置.13. 這是要S3C2440的詳細(xì)資料.14. Ｓ３Ｃ２４１０ ＢＳＰ 開發(fā)板Ｓ３Ｃ２４１０ 的板極支持包.15. 嵌入式軟件軟件方面的一本書。英文版.16. 等概率二進(jìn)制碼,循環(huán)碼,跳頻碼,PPM-TH調(diào)制器,脈沖形成器,PPM-TH信號(hào)發(fā)送器。.17. Tiny printf function for embedded programming.18. 控制東西南北交通燈,非常有用!可以實(shí)現(xiàn)!.19. 嵌入式系統(tǒng) —基于32位微處理器與實(shí)時(shí)操作系統(tǒng) 2006年春季 北京航空航天大學(xué)計(jì)算機(jī)學(xué)院.20. 基于SystemView 的AM調(diào)幅系統(tǒng)調(diào)制解調(diào).21. 基于CPLD的交通燈系統(tǒng)設(shè)計(jì).22. 很有用的哦!這是一個(gè)有關(guān)于發(fā)射電路的全部電路!.23. 基于T6963C的LCD液晶顯示的實(shí)現(xiàn).doc發(fā)表在《自動(dòng)化技術(shù)與應(yīng)用》的軟件設(shè)計(jì)文章.24. 使用硬件I2C對(duì)E2PROM進(jìn)行操作.25. 網(wǎng)上下的848主板的電路圖 希望對(duì)大家有用.26. 詳細(xì)解釋了vsftpd的設(shè)置等方面的內(nèi)容.27. 居與ARM9的最小文件系統(tǒng).28. 將模擬溫度傳感器與數(shù)字轉(zhuǎn)換接口電路集成在一起.29. 240128a液晶 詳細(xì)技術(shù)手冊(cè)（中文）.30. hgo12864a液晶 詳細(xì)技術(shù)手冊(cè) 中文.31. 關(guān)于嵌入式C語言的一些精華資料.32. emc的實(shí)戰(zhàn)實(shí)例,注釋很詳細(xì)的.一定對(duì)大家有幫助. 1 of 5.33. emc的實(shí)戰(zhàn)例子 2 of 5 注釋很詳細(xì),相信對(duì)大家一定有很大幫助..34. emc的實(shí)戰(zhàn)例子 3 of 5 注釋很詳細(xì),相信對(duì)大家一定有很大幫助..35. emc的實(shí)戰(zhàn)例子 4 of 5 注釋很詳細(xì),相信對(duì)大家一定有很大幫助..36. emc的實(shí)戰(zhàn)例子 5 of 5 注釋很詳細(xì),相信對(duì)大家一定有很大幫助..37. 這里有一個(gè)"EDA技術(shù)基礎(chǔ)_第1章",謝謝大家支持!.38. 這是一篇課件_EDA技術(shù)基礎(chǔ)_第2章 希望大家支持!.39. 這里接著是"EDA技術(shù)基礎(chǔ)_第3章",謝謝大家支持!.40. 這里接下來是"EDA技術(shù)基礎(chǔ)_第4章" 謝謝大家!.
標(biāo)簽： 機(jī)械 工程設(shè)計(jì)
上傳時(shí)間： 2013-07-05
上傳用戶：eeworm
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