膨胀系数
![](https://wkrtcs.bdimg.com/rtcs/image?w=140&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"140","h":"55","dataType":"gif","c":"word/media/image1.png"})
推导过程如下：
根据定义![](https://wkrtcs.bdimg.com/rtcs/image?w=207&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"207","h":"83","dataType":"gif","c":"word/media/image2.png"})
（1）
根据多变方程![](https://wkrtcs.bdimg.com/rtcs/image?w=57&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"57","h":"24","dataType":"gif","c":"word/media/image3.png"})
，两边同时对T求导，可得：
![](https://wkrtcs.bdimg.com/rtcs/image?w=359&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"359","h":"59","dataType":"gif","c":"word/media/image4.png"})
（2）
将（2）带入（1），得：
![](https://wkrtcs.bdimg.com/rtcs/image?w=95&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"95","h":"55","dataType":"gif","c":"word/media/image5.png"})
***********************************************************
压缩系数
![](https://wkrtcs.bdimg.com/rtcs/image?w=251&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"251","h":"59","dataType":"gif","c":"word/media/image6.png"})
推导过程如下：
根据定义![](https://wkrtcs.bdimg.com/rtcs/image?w=207&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"207","h":"83","dataType":"gif","c":"word/media/image7.png"})
（1）
根据多变方程![](https://wkrtcs.bdimg.com/rtcs/image?w=52&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"52","h":"44","dataType":"gif","c":"word/media/image8.png"})
，两边同时对P求导，可得：
![](https://wkrtcs.bdimg.com/rtcs/image?w=239&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"239","h":"56","dataType":"gif","c":"word/media/image9.png"})
（2）
将（2）带入（1），得：
![](https://wkrtcs.bdimg.com/rtcs/image?w=63&md5sum=fb0c8b409f1df77fa5b5ae03b4a42d9d&sign=4f9ddeabdc&rtcs_flag=1&rtcs_ver=3.2&l=webapp&bucketNum=56&ipr={"t":"img","w":"63","h":"55","dataType":"gif","c":"word/media/image10.png"})
本文来源：https://www.2haoxitong.net/k/doc/f58773e527284b73f3425043.html
文档为doc格式