An optimization model for the body-in-white (BIW) of a commercial vehicle cab is set up with natural frequency as constraint and minimizing the volume of welding spots as the objective.
为某一商用车驾驶室白车身建立了以固有频率为约束条件，焊点体积最小化为目标的优化模型。
2
The frequency and intensity of urban heat island in commercial landscape, industrial landscape, residential landscape and forest landscape were studied through fixed point measurements.
通过定点观测的方法对商业区、工业区、社区和森林公园的热岛发生频率及其强度进行了研究。
3
Probable reasons for frequency differences of different speech acts in commercial advertising slogans are also explored.