The equivalent distance method is put forward to determine polymer melt front advancement during injection molding.
提出一种新的确定注塑成型充模阶段塑料熔体前沿位置的当量距离法 ;并按照流动路径与熔体前沿尽可能正交的原则将模具型腔划分为由浇口起始的若干条流动路径 ,将各条流动路径与不同时刻熔体前沿交织而成的网格用于注塑成型过程的数值模拟计算 ,完成了对注塑制品收缩率的预
The essay discusses the strictness of rigid distance measurement with steel ruler and puts forward some suggestions on teaching.
讨论了测量学教材中钢尺精密量距的严密性 ,提出了教学中应注意的事
In the fault diagnosis through acoustic emission technique based on wavelet analysis and neural networks,the wavelet packet method based on sections and energy-moment feature was used to replace the traditional "wavelet packet-energy" to pick-up characteristics of AE signals.
基于小波包分析和神经网络的声发射信号缺陷检测方法,提出采用区间小波包分解与能量距相结合作为声发射信号的特征向量,取代了传统的"小波包-能量"特征提取方法,并以金属罐形容器罐底缺陷诊断为例验证了该方法的有效性。
By modifying the definition of antibody, an improved immune algorithm (IIA) based on the vector distance is presented.
基于信息熵的免疫算法存在计算复杂 ,设置的参数需要凭经验调节和含有冗余的计算信息而导致算法收敛速度慢的缺点 ,通过对免疫抗体定义的改进 ,本文提出了一种基于矢量距的改进免疫算法并证明了它的全局收敛性。