Despite the definitude optimizing method is general, more and more designers realize that the material properties 、 member measurements and the outside actins are stochastic geometry quantities or physical quantities . therefore, the optimizing design of project should be changed from determine to undetermined 盡管確定性的優(yōu)化方法目前應(yīng)用普遍,但是目前已經(jīng)開(kāi)始認(rèn)識(shí)到材料性能,構(gòu)件尺寸以及結(jié)構(gòu)外來(lái)作用都是隨機(jī)的幾何量或物理量,而不是確定的單值量。