由于安全系数的目标函数是非凸的、多变量的并且存在多个极小值，所以一般边坡最危险滑弧的搜索是困难的。
Because the objective function of the safety of factor is nonconvex, multi-variable, and existing many minimums, searching the most dangerous failure surface usually is difficult.
在局部连通集上定义了连通b -凸函数；在关于弧的右上导数的基础上，定义了连通- B伪凸，连通b -拟凸函数，推广了B -凸函数。
Then it expands the B-vex functions by defining connected pseudo B-vex and connected quasi B-vex functions in terms of right upper derivative with respect to an arc.
建立了软开关逆变弧焊电源的传递函数，设计了电源外特性控制电路，得到了较理想的电源外特性。
The transition function of soft switching inverter arc power is developed. The control circuit of outer character of the power is designed as well. And an ideal outer character is obtained.
建立了软开关逆变弧焊电源的传递函数，设计了电源外特性控制电路，得到了较理想的电源外特性。
The transition function of soft switching inverter arc power is developed. The control circuit of outer character of the power is designed as well.
根据旋弧弧根处熔化液池的受力分析，在理论上建立了能描述旋弧喷溅侵蚀特性的函数关系式。此理论关系表明，在无外磁场作用下，液池中心受力最大，将形成中心喷溅；
According to the analysis of the applied forces on the molten poor at arc root the theoretical function in which the arc erosion of metal droplet ejection can be characterized was founded.
根据旋弧弧根处熔化液池的受力分析，在理论上建立了能描述旋弧喷溅侵蚀特性的函数关系式。此理论关系表明，在无外磁场作用下，液池中心受力最大，将形成中心喷溅；
According to the analysis of the applied forces on the molten poor at arc root the theoretical function in which the arc erosion of metal droplet ejection can be characterized was founded.
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