The extension curves are constructed by the geometric continuous conditions by minimizing some fairing functions based on the shortest arc-length, minimum energy and minimum curvature variation of the curves respectively.
在保持几何连续及光顺的条件下,将一条已知的三次B啨zier曲线延拓到另一条与其不相邻接的三次B啨zier曲线,其中间媒介同样是三次B啨zier曲线,可以是一条,也可以是2条,而且其形状可以由用户加以调整·同时利用几何拼接的条件构造出形状可调的延拓曲线,进而对近似于曲线弧长、曲线能量、曲率变化率的几类目标函数分别极小化,以生成各种光顺的曲线
The magnitudes of the endpoint tangent vectors are optimized in the process of Hermite interpolation so that the curvature variation of the optimized geometric Hermite curve is a minimum.
通过在Hermite插值过程中最优化端点切矢的模长,使最优几何Hermite曲线的曲率变化率最小;得到并证明了使最优几何Hermite曲线达到几何光顺的切矢角约束条件。
The method took the normalized change ratio of frequency and the Frobenius norm of mode shape vector as the input vector of BP neural networks.
将标准化固有频率变化率和质量归一化振型向量变化量的Frobenius范数作为损伤识别神经网络输入参数,以结构中与损伤杆件相关联的节点损伤系数作为神经网络的输出参数,来判定结构损伤位置和损伤程度。
Instantaneous frequency rate estimation of multicomponent two-dimensional chirp signals
多分量二维线性调频信号瞬时频率变化率估计
A Research on Measurement Technique of Frequency Rate in the Single Observer Passive Location System;
单站无源定位中频率变化率测量技术研究
Research of Passive Location on the Basis of Doppler Changing Rate;
基于多普勒频率变化率的无源定位技术研究
The Study of Challenge Technology of Single Observer Passive Location and Tracking Using Frequency Rate and Differential Direction of Arrival;
利用频率变化率和波达角变化率单站无源定位与跟踪的关键技术研究
Research of Measure Techniques for Doppler Frequency Rate-of-Change in Deceive Jamming Signals
欺骗干扰信号中多普勒频率变化率测量技术研究
permeability-frequency convertor
导磁率－频率变换器
Optimization and control of induction machine's efficiency and power factor based on VVCF
变压恒频感应电机效率功率因数优化控制
Influence of Interaction Time on Frequency Shift Quantity of Frequency Change in Photonic Crystal
光子晶体频率变换中作用时间对频率变化量的影响分析
Frequency Conversion Based on Periodically Poled Lithium Niobate Waveguide;
周期极化铌酸锂波导的频率变换研究
The lowest frequency of a periodically varying quantity or of a vibrating system.
基频周期变化量或振动系统的最低频率
Design of L-band Frequency Agility Broadband Frequency Synthesizer Design
L波段宽带频率捷变频率综合器设计
The vibration is varied in frequency over a range on the order of 5 to 2,00 0 cps, usually at a constant octave.
振动的频率在5到2000赫的范围内变化，通常用一常值的八阶变化率。
Electromyography Mean Power Frequency Alternations during Rapid Transition of Elbow Flexion to Extension
主动肌和拮抗肌功能转变瞬间的肌电平均功率频率变化
A miniaturized frequency selective surface with excellent center frequency stability
高频率稳定性的小型化频率选择表面
The frequency inverters has a function of variable voltage and variable frequency.
频率逆变器具有变压、变频功能。
The Entanglement of Two Atoms in a Coherent Field of Time-Varying Frequenry
频率变化的相干态光场中两原子纠缠演化
automatic frequency control transformer
自动频率调整变压器
frequency-DC voltage converter
频率-直流电压变换器