Oracle recommends an empirical value of 10.
Oracle建议的经验值是10。
By comparing with the empirical value of the actual engineering practice, revision was made in settlement calculation by JCCAD to make foundation design more reasonable.
结合地区经验对JC CAD沉降计算值进行修正，使基础设计更加合理。
With the increase of extra-long tunnel construction, obviously, the empirical value can not keep up with the actual. So it needs to work out a method for natural wind computation.
随着特长隧道建设工程的增多，经验取值显然与实际不符，有必要建立一套隧道内自然风计算方法。
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