1) non-instantaneous-pole envelope
无瞬心包络
1.
With regard to the question how to cut the helical camber of screw-pump and spiral rod drilling tool in the field of petroleum machine and chemical machine, this paper firstly puts forward the cutting method how to apply the milling with non-instantaneous-pole envelope principle with plate milling cutter in our country.
本论文针对石油、化工机械领域螺杆泵、螺杆钻具转子的螺旋曲面切削加工问题，在国内首次提出了应用盘铣刀的无瞬心包络铣削加工方法。
2) non-instantaneous section envelope machining principle
无瞬心包络法
1.
By using the non-instantaneous section envelope machining principle, a mathematical model of mold grinding helical-spur cylinder gear is established,which is a calculating method to shape axile sectional of grinding wheel for numerical control mold grinding helical-spur cylinder gear.
利用无瞬心包络法成形加工的原理 ,建立了成形磨削斜齿圆柱齿轮的一种数学模型 ,为斜齿圆柱齿轮数控成形磨削的砂轮轴向修形提供了一种计算方法。
3) non-instantaneous center envelope milling
无瞬心包络铣削
1.
In order to enhance the helical-surface of the screw efficiency and the precision in the non-instantaneous center envelope milling,analyzed and compared the commonly used data fitting algorithm,proposed suited the numerical control processing programming the method,Step-Changing Method,it is a common method in NC programming.
为了提高螺杆的螺旋曲面在无瞬心包络铣削中的效率与精度,分析比较了常用数据逼近算法,提出了适合无瞬心包络铣削数控加工的编程方法,即伸缩步长法。
4) Inner Whirlwind Non-instant Center Envelope
内旋风式无瞬心包络铣削
5) instantaneous envelope
瞬时包络
1.
The proposed algorithm extracts the instantaneous envelope of the signals based on the Hilbert transform,and then the distribution vectors of the instantaneous energy are extracted.
该方法在通带内利用Hilbert变换提取瞬时包络,然后统计瞬时能量分布向量作为特征向量来实现调制方式分类,避免了搬移到基带过程中带来的频差、相差等计算误差。
补充资料：心包络咳
心包络咳 心包络咳 病名。咳嗽时心胸部隐痛的病患。《杂病源流犀烛·咳嗽哮喘源流》：“心包络咳，心胸间隐隐作痛。宜以心经药治之，如丹皮、山栀、肉桂等。”参见心经咳嗽、咳嗽条。
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参考词条