Modbus TCP/IP服务器PIC18F

tf–idf, short for term frequency–inverse document frequency, is a numerical statistic that is intended to reflect how important a word is to a document in a collection or corpus.[1]:8 It is often used as a weighting factor in information retrieval and text mining. The tf-idf value increases proportionally to the number of times a word appears in the document, but is offset by the frequency of the word in the corpus, which helps to control for the fact that some words are generally more common than others. Variations of the tf–idf weighting scheme are often used by search engines as a central tool in scoring and ranking a document s relevance given a user query. tf–idf can be successfully used for stop-words filtering in various subject fields including text summarization and classification. One of the simplest ranking functions is computed by summing the tf–idf for each query term many more sophisticated ranking functions are variants of this simple model.

SMAL是short message abstract library的缩写,是由风起水流软件工作室（www.zealware.com）开发的一个支持短信网关系统开发的C++底层抽象接口库，通过对移动、联通、网通、电信等运营商使用的各种短信协议和底层通信的抽象封装，SMAL实现了一个高度自适应的短信协议栈，包括CMPP，SGIP，SMPP，SMGP，CNGP，EMPP等短信协议，同时可以很方便地在上面扩展实现新的协议和自定义的内部协议等。 SMAL目前支持的协议包括中国移动的CMPP2.0,CMPP3.0,中国联通的 SGIP1.2, SGIP1.2修订版，中国电信的SMGP2.0，SMGP3.0，中国网通的CNGP2.0，和国际标准SMPP3.3，SMPP3.4，以及企信通协议EMPP等。(SMAL is a short message abstract library acronym by wind currents from studio software (www.zealware.com) to develop a support system developed by SMS Gateway C++ Underlying abstract interface library, through the Mobile, Unicom, Netcom and telecommunications operators using a variety of messaging protocols and the bottom of the abstract communications package, SMAL achieve a highly adaptive messaging protocol stack, including the CMPP, SGIP, SMPP, SMGP, CNGP, EMPP such as SMS agreement, at the same time can be easily above the realization of the new agreement to expand and customize the internal agreement. SMAL currently supports the agreement, including China Mobile CMPP2.0, CMPP3.0, China Unicom SGIP1.2, SGIP1.2 revised edition, China Telecom SMGP2.0, SMGP3.0, China Netcom CNGP2.0, and international Standard SMPP3.3, SMPP3.4, as well as enterprises, such as ICT EMPP agreement.)

留言本..net做的,很简单,但是它很适合初学者.(voice of the net .. do, which is very simple, but it is very suitable for beginners.)

电源四个二极管构成的整流电路SIMULIINK仿真模型，一种基于MATLAB7.0 (The power four diodes constituting a rectifier circuit SIMULIINK simulation models, one based on MATLAB7.0)

以F407为主控核心实现的多旋翼飞行器飞控系统(Flight Control System of Multi-Rotor Aircraft Based on F407)

用于与机器领域和其他电子系统通信的iec104库

这是LPC1114单片机的I2C总线的程序，程序已可以运行，txt版文件。(This is a program LPC1114 microcontroller I2C bus, the program has been run, txt version of the file.)

鼠标拖动时 控件滑动 截图： 核心代码：using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;using System.Windows.Media.Animation;namespace FlashPrac2{ /// /// MainWindow.xaml 的交互逻辑 /// public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } /// /// 完成缓冲效果 /// /// 起始位置 /// 目标位置 /// 加速加速度 /// 减速加速度 /// 持续时间 private void DoMove(DependencyProperty dp, double to, double ar, double dr, double duration) { DoubleAnimation doubleAnimation = new DoubleAnimation();//创建双精度动画对象 doubleAnimation.To = to;//设置动画的结束值 doubleAnimation.Duration = TimeSpan.FromSeconds(duration);//设置动画时间线长度 doubleAnimation.AccelerationRatio = ar;//动画加速 doubleAnimation.DecelerationRatio = dr;//动画减速 doubleAnimation.FillBehavior = FillBehavior.HoldEnd;//设置动画完成后执行的操作 grdTransfer.BeginAnimation(dp, doubleAnimation);//设置动画应用的属性并启动动画 } private double pressedX; /// /// 点击鼠标，记录鼠标单击的位置 /// /// /// private void grdTest_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { ////获得鼠标点击的X坐标 pressedX = e.GetPosition(cvsGround).X; } ////鼠标释放时的操作 private void grdTest_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e) { double transferLeft = Convert.ToDouble(grdTransfer.GetValue(Canvas.LeftProperty)); //btn1.Content = transferLeft.ToString(); if (transferLeft > 0) { transferLeft = 0; } if (this.Width - transferLeft > cvsGround.Width) { transferLeft = this.Width - cvsGround.Width; } ////获得鼠标释放时的位置 double releasedX = e.GetPosition(cvsGround).X; ////获得距离间隔 double interval = releasedX - pressedX; pressedX = 0; ////计算出传送带要的目标位置 double to = transferLeft interval; ////移动 //btn1.Content = transferLeft.ToString() " " to.ToString(); // btn1.Content = transferLeft.ToString() " " to.ToString(); DoMove(Canvas.LeftProperty, to, 0.1, 0.5, 0.5); } }}

SURF Feature is an algorithm that is used in the object recognition please see the source code

双闭环可逆直流调速（H桥）simulink仿真模型，波形很好((Double closed loop reversible DC speed control (H bridge) Simulink simulation model, the waveform is very good))