张力做了功吗，在环形轨道的例子里，也许法向力做了功？
Is the tension doing any work and in the case of my circular track is, perhaps, the normal force doing any work?
考古学家在一份声明中说，经放射性碳测年法鉴定，环形巨石阵应该建造于公元前2400年至公元前2200年之间，比之前的推测晚了几百年。
The archaeologists said in the statement that radio-carbon dating put the construction of the circle of bluestones at between 2,400 B.C. and 2,200 B.C., a few centuries later than originally thought.
环形子孔径法是一种无需辅助元件就能实现对大口径、大相对口径非球面检测的“柔性”测试技术。
Annular subaperture test method has been developed for low cost and flexible measurement of large, fast aspheric surfaces without any special elements.
本文利用了解析法对电机定子面内弯曲模态的特征进行了分析，得到了圆环形薄板固有频率的理论表达式。
This thesis utilize the analytic method to stator of ultrasonic motor the curving vibration, receive the theory expression formula of the natural frequency of the round annular sheet metal.
本文应用改进的多重尺度法，研究环形和圆形薄板屈曲后的性态。
In this paper we apply the modified method of multiple scales to study the post-buckling behaviors of annular and circular plates.
采用有限元分析法和X射线应力测试法对铍环形焊件的残余应力分布规律进行了研究。
The residual stress of the beryllium ring weldment was studied by FEM simulation and X ray stress measurement.
本文将奇异函数法应用于结构的塑性极限分析，简化计算某些固支环形板的极限荷载。
In this paper, the method of singularity function is applied to the structural plastic limit analysis, and simplified the calculation of limit loads of some annular plates of fixed supports.
研究了用频域法实现圆环形目标物计数的方法。
The method of counting for circular ring objects in frequency domain is proposed.
总结非球面常用检验方法在应用中优、缺点的基础上，使用环形子孔径扫描法来测量大口径非球面。
On the basis of summing up conventional testing methods for aspheric surfaces , annular sub-aperture scanning method is applied to measurement of large-aperture aspheric surfaces.
本文引入了变刚度法实现了环形空腹索桁结构体系的荷载缓和。
Load relieving of the structure is achieved by introducing the rigidity-modulating analysis method.
给出了采用热点应力法进行铸钢节点环形对接焊缝疲劳寿命估算的全过程。
The paper presents the life evaluating process of girth butt welds by hot spot stress method and the calculation methods of hot spot stress range.
本文采用有限元法研究近场双圆形孔洞、圆环形衬砌对瞬态sh波的散射和动应力集中问题。
The scattering problems and the dynamic stress concentration problems of SH-wave by double circle cavities, and circle lining in near field are investigated in this thesis by the method of FEM.
本文改进了常规表面光电压测试少子扩散长度法，采用环形下电极消除了薄样品背面光电压信号对测量结果的影响；
The authors improved the routine steady-state surface photovoltage method to measure minority carrier diffusion length in both sides polished silicon wafers.
环形手写输入法是手持终端心不可少的环节，全新的界面远优于数字键及小键盘。
The new interface evolves mobile text entry beyond thumbing on numeric keypads or miniaturized keyboards .
采用修正摄动法研究了变密度环形薄膜的轴对称横向固有振动，并求得了确定其横向振动固有频率的特征方程。
In the paper, a perturbation solution analysis for axisymmetric transversal intrinsic vibrations of annular membranes with varying density is presented.
采用修正摄动法研究了变密度环形薄膜的轴对称横向固有振动，并求得了确定其横向振动固有频率的特征方程。
In the paper, a perturbation solution analysis for axisymmetric transversal intrinsic vibrations of annular membranes with varying density is presented.
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