Welcome to the exciting, empowering world of home automation! If you have ever wanted your home to do more than just protect you against the outside elements and want to interface it to the digital domain, this book will show you how. By demonstrating several easy-to-build projects, you will be able to take the skills you learned from this book and expand upon and apply them toward custom home automation projects of your own design.
標(biāo)簽： Programming Your Hom
上傳時間： 2020-06-06
上傳用戶：shancjb
This book is based on a Ph.D. research that has been conducted at the Delft University of Technology in the Netherlands in collaboration with Dutch Electricity & Gas Distribution Network Operator, Stedin. This book was written as a result of wider interest that was shown by different industry groups on this topic after its public defence. This inspired the author to modify and publish a practical version of the research for a greater international audience. Therefore, the content of this book is intended for a double audience, on the one hand for those interested in the organisational and management aspects of maintenance.
標(biāo)簽： Maintenance Electricity Risk-Based Network for
上傳時間： 2020-06-07
上傳用戶：shancjb
One of the predominant topics in the domain of the emerging Smart Grid can be seen in standardization. With the combination of existing protection and automa- tion technology with upcoming ICT-based solutions, different interoperability is- sues arise when technologies have to be combined in the infrastructure. Standards have proven to be one of the most striking solutions to actually cope with this topic. Since 2008, this topic has gained much attention in various political and technical agendas.
標(biāo)簽： Standardization Smart Grids in
上傳時間： 2020-06-07
上傳用戶：shancjb
Control Systems Engineering is an exciting and challenging field and is a multidisciplinary subject. This book is designed and organized around the concepts of control systems engineering using MATLAB, as they have been developed in the frequency and time domain for an introductory undergraduate or graduate course in control systems for engineer- ing students of all disciplines.
上傳時間： 2020-06-10
上傳用戶：shancjb
modbus-demo, Public M_3W_D(50) As Long Public M_4W_D(500) As Long Public M_0W_B(100) As Long Public M_1W_B(100) As Long Public PLC_B(50) As Single Public PLC_C(50) As Long Public T1t(500) As Long Public M_3x(500) As Long Public M_4x(500) As Long Public MODEL As Long Public Party As Long
標(biāo)簽： modbusdemo
上傳時間： 2020-11-09
上傳用戶：
HRVAS is a complete and self-contained heart rate variability analysis software (HRVAS) package. HRVAS offers several preprocessing options. HRVAS offers time-domeain, freq-domain, time-frequency, and nonlinear HRV analysis. All results can be exported to an Excel file. For processing many files HRVAS offers a bach processing feature. All settings/options can be saved to a .mat file and reloaded for future HRV analysis. Upon starting HRVAS all previously used settings/options are loaded.
標(biāo)簽： HRVAS時頻分析
上傳時間： 2021-09-19
上傳用戶：boboo
隨著光通信的蓬勃發(fā)展，光纖通信技術(shù)廣泛應(yīng)用于電信、電力、廣播等領(lǐng)域，對整個信息產(chǎn)業(yè)產(chǎn)生了深遠影響，光纖已成為當(dāng)前最有前景的傳輸媒介。與此同時，光纖測試技術(shù)在光纖生產(chǎn)、現(xiàn)場鋪設(shè)與后期維護等工程領(lǐng)域中得到廣泛應(yīng)用。光時域反射儀（Optical Time Domain Reflectometer），又稱背向散射儀，是一種用于表征光纖鏈路物理特性的精密光學(xué)測試儀器，主要用于測試光纖鏈路長度，精確定位斷點事件，計算光纖損耗，并提供與長度有關(guān)的衰減細節(jié)。光纖鏈路中待測光纖的測量長度范圍和測量精度，取決于OTDR的激光出纖功率和光脈寬。因此，需要設(shè)計合適的激光脈沖驅(qū)動電源及配套的控制和探測系統(tǒng)，研究激光出纖功率和脈寬對測量長度和測量精度的影響，從而獲得能滿足不同光纖鏈路測量需求的OTDR系統(tǒng)解決方案。文章在具體描述了光時域反射儀的工作機理以及影響其主要性能的關(guān)鍵參數(shù)的基礎(chǔ)上，提出以設(shè)計能提供大功率、窄脈沖電流信號的激光驅(qū)動電源作為提高OTDR性能的主要手段。在掌握半導(dǎo)體激光驅(qū)動原理的基礎(chǔ)上，經(jīng)過細致地比較與方案論證提出以 MOSFET作為激光脈沖驅(qū)動電源的開關(guān)器件，以能量儲存法作為窄脈沖產(chǎn)生機制的脈沖電源設(shè)計方案，設(shè)計實現(xiàn)基于FPGA的觸發(fā)脈沖信號，并通過 Multisim對系統(tǒng)硬件電路仿真優(yōu)化，實現(xiàn)激光脈沖驅(qū)動大功率、窄脈寬輸出。以雪崩二極管作為光電探測系統(tǒng)關(guān)鍵響應(yīng)轉(zhuǎn)換器件驗證驅(qū)動電源性能，并完成光纖測距。最終成功研制出一套基于納秒脈沖激光和對應(yīng)光電探測系統(tǒng)的OTDR系統(tǒng)，并進行了實際測試測試和研究結(jié)果顯示：所研制的脈沖激光電源能輸出的最小脈寬為33n，最小輸出峰值電流為1A，且峰值電流及頻率大小可調(diào)。大電流窄脈寬驅(qū)動電源信號輸出可極大地增強光時域反射儀的動態(tài)范圍以及分辨率，探測器分時調(diào)控測量技術(shù)可以極大地提高系統(tǒng)的測量精度和信噪比。
上傳時間： 2022-03-11
上傳用戶：
大家先試用一下，源碼后面奉上！！！using System;using System.Collections.Generic;using System.Configuration;using System.Data;using System.Linq;using System.Threading.Tasks;using System.Windows;namespace SerialCom{ /// <summary> /// App.xaml 的交互邏輯 /// </summary> public partial class App : Application { }}
標(biāo)簽： 串口調(diào)試
上傳時間： 2022-03-25
上傳用戶：kent
學(xué)習(xí)本章要達到的目標(biāo)：口1.理解 Linux內(nèi)核編譯選項的含義口2.學(xué)會根據(jù)不同的硬件配置裁減定制內(nèi)核；口3.理解內(nèi)核編譯過程中每一步的功能，并編譯 Linux2.630內(nèi)核。需要去重新編譯 Linux內(nèi)核口增加操作系統(tǒng)對新的硬件設(shè)備的支持口增加內(nèi)核新的功能口對內(nèi)核代碼或內(nèi)核配置進行優(yōu)化時Prompt for development and/or incomplete code/drivers口顯示處于開發(fā)調(diào)試中或尚未完善的代碼或驅(qū)口選中：如果是測試人員或者開發(fā)者；口不選：其他情況Local version append to kerne release口追加本地版本號口使用命令“uname-a”進行查看。POSIX Message Queues口 POSIX消息隊列的支持，這是 POSIX進程間通信的一部分BSD Process Accounting口將進程的統(tǒng)計信息寫入文件口信息通常包括建立時間、所有者、命令名稱、內(nèi)存使用、控制終端等，這個選項一般是選擇的。Enable loadable module support口使能可加載模塊支持口如果使能此選項則可以通過"makemodules_insta"把內(nèi)核模塊安裝在/lib/modules/中Kernel support for ELF binaries口內(nèi)核對ELF文件格式的支持口ELF是開放平臺下最常用的二進制文件格式支持動態(tài)連接，支持不同的硬件平臺Kernel support for a out and ECOFF binaries口早期UNIX系統(tǒng)的可執(zhí)行文件格式，目前已經(jīng)被ELF格式取代Unix domain sockets口本機高效率的 Socket口僅能運行在本機上的高效率的 Socket，簡稱 Unix socket。口很多進程使用為這種機制在操作系統(tǒng)內(nèi)部進行進程間通信，例如 X Window和 syslog等TCP/IP networking口TcP/IP網(wǎng)絡(luò)協(xié)議的支持
標(biāo)簽： linux
上傳時間： 2022-03-29
上傳用戶：kingwide
Lwip協(xié)議棧的實現(xiàn)目的，無非是要上層用來實現(xiàn)app的socket編程。好，我們就從socket開始。為了兼容性，lwip的socket應(yīng)該也是提供標(biāo)準(zhǔn)的socket接口函數(shù)，恩，沒錯，在src\inc lude\lwip\socket.h文件中可以看到下面的宏定義：#if LWIP COMPAT SOCKETS#define accept（a，b，c）Iwip accept（a，b，c）#define bind（a，b，c）Iwip bind（a，b，c）#define shutdown（a，b）Iwip shutdown（a，b）#define closesocket（s）Iwip close（s）好，這個結(jié)構(gòu)先不管它，接著看下get socket函數(shù)的實現(xiàn)【也是在src\api\socket.c文件中】，在這里我們看到這樣一條語句sock =&sockets[s]；很明顯，返回值也是這個sock它是根據(jù)傳進來的序列號在sockets數(shù)組中找到對應(yīng)的元素并返回該元素的地址。好了，那么這個sockets數(shù)組是在哪里被賦值了這些元素的呢？進行到這里似乎應(yīng)該從標(biāo)準(zhǔn)的socket編程的開始，也就是socket函數(shù)講起，那我們就順便看一下。它對應(yīng)的實際實現(xiàn)是下面這個函數(shù)Int Iwip socket（int domain，int type，int protocol）【src\api\socket.c】這個函數(shù)根據(jù)不同的協(xié)議類型，也就是函數(shù)中的type參數(shù)，創(chuàng)建了一個netconn結(jié)構(gòu)體的指針，接著就是用這個指針作為參數(shù)調(diào)用了alloc socket函數(shù)，下面具體看下這個函數(shù)的實現(xiàn)
標(biāo)簽： lwip 底層結(jié)構(gòu)
上傳時間： 2022-06-19
上傳用戶：aben
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