internal_error

Tactically maneuvering targets are difficult to track since acceleration cannot be observed directly and the accelerations are induced by human control or an autonomous guidance system therefore they are not subject to deterministic models. A common tracking system is the two-state Kalman Filter with a Singer maneuver model where the second order statistics of acceleration is the same as a first order Markov process. The Singer model assumes a uniform probability distribution on the target s acceleration which is independent of the x and y direction. In practice, it is expected that targets have constant forward speed and an acceleration vector normal to the velocity vector, a condition not present in the Singer model. This paper extends the work of Singer by presenting a maneuver model which assumes constant forward speed and a probability distribution on the targets turn-rate

1.写一个程序，它先接收一个字符串，然后显示其中数字符的个数、英文字母的个数和字符串的长度。 2.模拟密码输入：假设数据库中有密码5201314，用户输入一个字符串，显示的时候全都以*出现，然后判断用户输入的字符串是否与数据库中密码相同，若相同，输出“Password Right!”，否则输出 “Password Error!” 3.写一个程序，它先接收一个字符串，然后抽去其中的空格，最后按相反的顺序显示这个改变后的字符串。 4.找出负数的个数 5.求阶乘(1. Write a program that first receives a string and then displays the length in which the number of characters and English letters and the number of strings. 2. Analog password: 5201314 suppose password, the user enters a string of all time display to* appear, and then determine if the string entered by the user and the same password , if the same output Password Right! otherwise, output Password Error! 3. Write a program, it first receives a string, and then removing all spaces, and finally display the string in reverse order after this change. 4. Find the number of negative 5. factorial)

简单的聊天软件，基于TCP/IP协议，使用MFC CSocket类编写，分为客户端和服务器端两部分，适合初学者学习

AOL的在线聊天系统的客户端-AOL chat client

一个支持PING协议的MFC类CPing (an agreement to support the MFC category CPing)

dendrites code for phase field modelling

This SMPP tester all of SMS type

用于asp网站中传输文本的加密，防止明文传输造成的内容泄露-Asp sites for transmission of the encrypted text, specifically to prevent transmission of the contents caused by leaks

动态口令HOTP的JAVA代码实现，通过种子和认证基数产生6个字符的动态口令(Dynamic password HOTP implementation of JAVA code, and certification through seed produced six characters cardinality dynamic password)

说明：  在单片机上用C语言实现煤气报警器，一旦煤气浓度超过预制，就会报警(Gas Alarm Based on Single Chip Microcomputer)