The empirical formula for velocity decay was obtained by use of theoretical analysis.
通过理论分析给出了风口速度衰减的经验公式。
This paper proposes a scientific hypothesis that the resistance is linear and suggests a sectional average velocity formula for river flow which reflects the character of river.
本文提出了阻力线性假设，并结合河槽断面的具体情况，对河槽的断面平均流速公式进行了探讨。
Thus an analytic formula with two parameters of high explosive (i. e. detonation velocity and polytropic index) for estimation of the velocity of flying plate is established.
从而给出了用爆速和多方指数等两个炸药示性参量表出的估算飞片运动的良好近似公式。
A formula is deduced for the velocity induced by the vortices in two-dimensional shallow water flows and it is used to correct the Biot-Savart law.
建立了二维浅水流动的旋涡诱导速度公式，在已知旋涡场和胀量场时，由该表达式可确定流动速度场。
The law conversation of energy and the hole diameter formula of jet perforating are employed to deduce the relationship of diameter and velocity of jet for cylindrical hole of perforation concrete.
文中根据能量守恒原理及侵彻孔径公式，推导了获得圆柱形穿孔的射流直径与速度的关系。
Based on the experiments of 1000 sets of concrete parts in room for a year, the relations formula and curve for concrete strength (r) and stress wave velocity (v) are determined.
本文依据一年来的室内1000组混凝土试件试验，率定出混凝土强度(r)与应力波速(V)相关公式及曲线，在工程检测精确计算中具一定的参考价值。
For exploring the direction of acoustical emission sources prior to earthquakes, assuming that the sound velocity is only dependent on depth, a formula of sound source direction can be derived.
为探索震前声发射的方向与地震的关系，假定声速仅与深度有关，在这种条件下得到的方向公式应该与恒速条件下得到的方向公式一致。
Besides, a basis formula of vibration velocity prediction model that is suitable for multi-row millisecond blasting was proposed.
此外，文中提出了一个适用于多排孔延时爆破振动速度预测模型的依据公式。
Based on the adequate examination of calculation for measured velocity profiles, the accuracy of the formula would be higher than that of the current international method.
经过大量实测流速分布进行计算检验，精度高于美、英等国现行使用的计算方法。
A recurrence formula for calculating the displacement and the velocity is derived by combining the theorem of impulse with the method of discretized similarity.
通过结合离散相似法和冲量定理，推演出一个计算位移和速度的递推公式。
Velocity distribution can be expressed by a logarithmic formula for the inner zone and a parabolic formula for outer and surface zones.
底部内区流速分布可用对数公式表示；外区和表面区可用二次抛物线公式表示。
Meanwhile, an empirical formula for evaluating the optimal rotational velocity is obtained.
同时得到了估算最佳转速的经验公式。
Most of the natural river flows are non-uniform, but the start and the starting velocity drag force formula for formulas are based on uniform flow up.
天然河流大多属于非均匀流，但起动拖曳力公式和起动流速公式都是在均匀流的基础上建立起来的。
The calculating formula used for the intumescent velocity was presented and was applied to the model proposed.
用于膨胀速度的计算公式被提出并应用提出的模型。
The calculating formula used for the intumescent velocity was presented and was applied to the model proposed.
用于膨胀速度的计算公式被提出并应用提出的模型。
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