计算公式

To realize the simple and accurate measurement of solution density, the calculation formula for solution density was deduced after establishing the relation between solution pressure and density.

摘 要：为了实现对溶液密度的简单、精确测量，建立了溶液压力与溶液密度之间的关系，推导出溶液密度的计算公式，确定了利用差压传感器来实现对溶液密度的间接测量，指出了测量的难点和解决的方法。

Based on the wave equations of electromagnetic field, a new time-domain numerical method-direct difference solution of vector wave equation is researched. Calculating formulas of electric field and magnetic field are also given.

对电磁场波动方程进行了分析，研究了一种基于电场波动方程的时域数值方法―矢量波动方程的直接差分解法，给出了电场和磁场的计算公式。

An approach was presented to evaluate fundamental frequency of bridge piers based on the combination of Rayleigh method and Southwell method.

在瑞利法和Southwell频率合成法的基础上导出了桥墩复合振动基频的计算公式，将基频表示成各惯性元和复原元所组成子系统的频率合成。

The formula for lower limit of natural frequency of tapered pier of continuous beam bridge were derived by the combination of Rayleigh and Southwell method.

采用瑞利法和Southwell频率合成法，将基频表示成各惯性元与复位元所组成的子系统的频率合成，导出了变截面桥墩自振频率下限的计算公式。

The formula for lower limit of natural frequency of tapered pier of continuous beam bridge were derived by the combination of Rayleigh and Southwell method. The natural frequency of tapered pier was composed of the sum of frequency of each subsystem consisted in inertia component and deformable component.

采用瑞利法和Southwell频率合成法，将基频表示成各惯性元与复位元所组成的子系统的频率合成，导出了变截面桥墩自振频率下限的计算公式。

Aiming at the structure characteristics of direct ejection type air-bubble sparger, the article analyzed the hydrodynamics model of the air ejecting outflow of the air-bubble sparger.

针对空气直接喷射式气泡发生器结构特点，分析了气泡发生器气体喷射出流的流体动力学模型，通过试验室和工业型浮选柱的清水气泡发生试验，修正了气泡喷射出流理论计算公式，对工业型浮选柱的大型化研制提供一定的理论依据。

For experimental setup to calibrate spectral radiance by applying a diffuse plane, the measured spectral radiance can be obtained through integral of spectral radiation flux entering the spectrometer.

在利用漫反射板标定光谱辐亮度的实验装置中，标准灯完全可以近似为点光源。通过对进入光谱仪的辐射通量的数值积分，可以对应求出仪器的实测光谱辐亮度的计算公式。

Spherical grinding error analysis is mainly about influence of geometric precision of machine on precision of graund parts, the influences of vertical, horizontal and angle on the spherical degree errors were researched respectively, and the specific calculation formulas were deduced.

主要针对机床几何精度对磨削球面精度的影响，分别从上下、左右、角度三个方面对球面度误差的影响展开了研究，得出了具体的计算公式。

Therefore, the new formula which is derived according to the shape of the spherical cap is lack of the theoretical foundation.

因此，按球帽形假设推导出的临界携液流速和流量计算公式缺乏理论依据。

With the theoretical model of spherical grain dynamics of sparse two-phase flow in single dimension, computing formulas of velocity′s attenuation and scattering distance were built for explosive residue grains in horizontal. Then, a simplified theoretical model on distribution of explosive residue was put forward on the basis of a spherical space with radius equalling to maximum horizontal scattering distance of explosive residue grains with certain diameter.

为了对残留物颗粒的飞散运动及分布规律进行理论分析，利用球形颗粒一维稀疏二相流动力学模型，研究得到炸药残留物颗粒的速度衰减及水平飞散距离计算公式；在此基础上，建立了以某粒径残留物颗粒水平运动极限距离为半径的炸药残留物颗粒球面空间分布简化理论模型。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。