阿基米德螺旋

The principle,testing method and mould for measuring the thermoplastics fluidity and cavity pressure by Archimedean spiral method are introduced.

主要介绍了阿基米德螺旋线法测定热塑性塑料流动性能和模腔压力的原理、测定方法和工具，并对注射成型系数的影响因素进行了探讨，可供生产实践参

The mathematical model was verified in experiment with the method of indirect squeeze cast Archimedean spiral proof sample. And the experimental results show that the maximum deviation between the theoretical value and measured value is less than 8%. This model can be used for quantitative analysis and estimating effects of the craft factors on the filling ability, and can also predict the maximum filling length. It has the important reference value to design the semi-solid alloy rheoforming technology and mould.

采用间接挤压铸造阿基米德螺旋线试样的方法对该数学模型进行了实验验证，实验结果表明：理论计算值与实验测定值之间的最大偏差小于8%；该数学模型可以定量分析和估算工艺因素对充型能力的影响，并可预测充型极限长度，这对半固态合金流变成形工艺设计和模具设计都有参考价值。

Circular twoarmed Archimedean spiral antenna s combination are designed and simulated with simulation software of high frequency electromagnetic Ansoft HFSS.

介绍微波被动比相测角的原理，利用ANSOFT高频电磁仿真软件HFSS设计圆形双臂阿基米德螺旋天线组合，天线组合的各项电性能指标均能满足微波宽带被动比相引信体制的要求，两天线进行中频比相的测试结果与理论计算结果吻合。

Two calculating methods of straight line and Archimedes spiral approximating involute are introduced.

介绍了用直线及阿基米德螺旋线逼近渐开线的两种方法。

This paper presents a new method——using mean radius of curvature to find the substitutive arc of Archimedes spiral,with which better precision can be obtained and the calculating formulas are very simple.

提出了一种用平均曲率半径法求阿基米德螺旋线的代用圆弧的新方法，其计算公式简单，并可得到较高的精度。

The archimedes spiral cord modulating chopper's exposure efficiency was theoretically analyzed and numerical simulated, and its impact on the following signal processing was obtained.

对阿基米德螺旋线调制斩波器的曝光效率进行了理论分析和数值模拟，得到斩波器曝光效率对后续信号处理的影响。

This paper presents the basic construction and movement rules of the coordinator gyrorotor with reticle of Archimedes spiral reticule pattern , Also, it explains the principles and methods of dynamical balance to damp the vibration and forced nutation.

阐述了具有阿基米德螺旋线图案的位标器的基本原理及其运动规律，并说明这种陀螺转子的振动与绕动的平衡原理与方法。

In this method,the Archimedes spiral was adopted as channel midline which could be generated by programmer in the process of modeling,and the original wooden patterns and the area change rule of channel could be modified,so that 3-D design of double-channel impellers could be implemented.

在该设计方法中，采用阿基米德螺旋线为流道中线，在造型过程中编入程序生成流道中线，并对原木模图和流道面积变化规律进行修正，实现对双流道式污水泵叶轮的三维设计。

He experimental assess method of alloy fluid is put forward used the length of Archimedes spiral line through indirect squeezing in squeeze casting.

提出了利用间接反挤阿基米德螺旋线长度来评价挤压铸造条件下合金熔体充型能力的实验评定方法。

Based on the Reynolds stress model CFD numerical simulation method, the experimental study of the inflow field and separation feature of nine forms of entrance structures of the oil-water separation hydrocyclone including vortex curved entrance and Archimedes spiral entrance is carried out and four kinds of ideal optimized entrance structures are obtained.

采用雷诺应力模型CFD数值模拟方法，对涡线形曲面入口、阿基米德螺旋线形入口等9种油水旋流分离器入口结构形式的内流场和分离特性进行了试验研究，得出比较理想的4种优化入口结构形式。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷