dd_tools_1_5_5

用于体域网体表到体表CM3（场景S4与S5）传输的信道模型，900MHz频段(This model is meant for body to body surface CM3 (Scenario S4 & S5) for 900 MHz)

matlab的仿真模拟书中的源码，大部分较为基础，可以当做参考(matlab simulation source code in the book, most of the foundation, can be used as reference)

说明：  某厂向用户提供发动机，合同规定，第一、二、三季度末分别交货40台、60台、80台．每季度的生产费用为 （元），其中x是该季生产的台数．若交货后有剩余，可用于下季度交货，但需支付存储费，每台每季度c元．已知工厂每季度最大生产能力为100台，第一季度开始时无存货，设a=50、b=0.2、c=4，问工厂应如何安排生产计划，才能既满足合同又使总费用最低．讨论a、b、c变化对计划的影响，并作出合理的解释(To provide users with a factory engine, contract, first, second and third quarter respectively, delivered at the end of 40, 60, 80. Quarterly cost of production (million), in which x is the quarter of the number of production. If the remaining after delivery, can be used for delivery next quarter, subject to payment of storage fees, for each element c of each quarter. The largest known plant production capacity of each quarter to 100, the beginning of the first quarter of stock, set up a = 50, b = 0.2, c = 4, asked how to arrange the production of the factory plans to meet the total cost of the contract makes the minimum . Discussion of a, b, c of the impact of change on the plan and make a reasonable explanation)

说明：  为Matlab的日历显示加上农历信息。 (There is a command named "calendar" in MATLAB for get calendar infomation. This code improve the calendar information with the lunar.)

calssification algorithm

matlab俄罗斯方块程序，，非常真实的界面，MATLAB_GUI设计多多学习(Tetris matlab procedures, very real interface, MATLAB_GUI design a lot to learn)

说明：  基于蚁群算法和Dijkstra算法的二维路径规划，程序是MATLAB的m文件，下载运行main文件即可(Two-dimensional path planning based on ant colony algorithm and Dijkstra algorithm, the program is m file of MATLAB, download and run the main file.)

vc与matlab7的混编，采用的混编方式是通过shared(vc matlab7 with the mixing of the way through the air shared)

说明：  RSA is a cryptosystem for public-key encryption, and is widely used for securing sensitive data, particularly when being sent over an insecure network such as the Internet.A user of RSA creates and then publishes a public key based on the two large prime numbers, along with an auxiliary value. The prime numbers must be kept secret. Anyone can use the public key to encrypt a message, but with currently published methods, if the public key is large enough, only someone with knowledge of the prime numbers can feasibly decode the message

热泵机组运行时，作为四大件之一的压缩机计算模型(Operation of the heat pump units, as one of the big four calculation model of compressor)