计算公式

The applications of fluorine-ion selective electrode method were done successfully in two aluminium plants.(2) The performance requests of alumina in aluminium production were concluded, and the mechanism of alumina dissolution in molten cryolite was discussed.

详细研究了氟离子选择电极法测定分子比，确定了计算公式和分析条件，并建立标准的操作分析规程，选定效果良好的分析设备，编制了方便直观的分子比计算程序，为该法的工业应用创造了条件。

Methods:According to the standard of Borden Ways and Seze Ways to measure the regular cervical and lumbar curvature, then use the sectorial area formula of mathematics geometry to calculate the regular curvature arch form area of cervical and lumbar.

按Borden法和Seze法的标准，测出正常颈曲和腰曲，然后按数学几何学扇形面积计算公式，即S弓形，计算出正常的颈曲、腰曲的弓形面积，并统计正常颈曲126例，正常腰曲114例，经统计学处理得出均值和标准差。

Compared with the field measurements, the formula is suitable for the distance within the shield cutterhead (±2L), which can help guiding actual tunnel construction.

通过实例计算并与实测结果对比发现，使用盾构变形计算公式适用范围在盾构机头前后±2L距离处，对指导实际盾构施工具有重要意义。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

The effect of coating ingradient on arc stability and slag detachability for basic electrode is discussed; and the status of current research on effect of coating ingradient on welding technology for basic electrode abroad is reveiwed.

利用光谱分析和扫描电镜对高硬度钢质堆焊层金属进行分析，采用修正后的焊条药皮重量系数计算公式计算出Nb、Ti、V的过渡系数，讨论了上述元素在碱性焊条中过渡系数的影响因素，初步得出Nb、Ti、V的过渡规律。

Slag detachability of new slag system basic electrode ;2. Weld fume quantity and emission rate of new slag system basic electrode ;3. It was discussed about the influence of the mentioned elements on the transition coefficient of basic electrode .

利用光谱分析和扫描电镜对高硬度钢质堆焊层金属进行分析，采用修正后的焊条药皮重量系数计算公式计算出Nb、Ti、V的过渡系数，讨论了上述元素在碱性焊条中过渡系数的影响因素，初步得出Nb、Ti、V的过渡规律。

In the calculation of COD and DO, the atmosphere oxygen resume equation and coefficient considered the molecule diffuseness and turbulence diffuseness are successfully exercised, and made a better result.

其中，COD、DO的计算中，成功的运用了本文建立的考虑了分子扩散和紊动扩散两种因素的大气复氧方程和大气复氧系数计算公式，取得较好的结果。

Computation formula for expecting probability is derived from simple mathematics Computation method for continuousset and discontinuous set of expecting probability, give reference and academics to personnels who are engaged in engineering hydrology design and research.

本文以简单的数学推导导出了期望概率的计算公式；给出了连续系列和不连续系列期望概率的计算方法；具有可操作性。对于从事工程水文设计和研究的人员具有一定的参考价值和学术价值。

And the heat transmission model is computed with FEM. Then the paper analyzed rules of difference in temperature. Different in temperature is divided into transverse temperature difference and lengthways difference, and corresponding formulas are respectively presented.

并在此基础上，进行了导热问题的有限元分析，得到了温差分布规律，将计算温差分解为横向温差和纵向温差几，并建立了相应的温差计算公式。

On the base of the classic theory of shear梑earing capacity of tall, formula for calculating the shear capacity of this kind of tall has been deduced, whose results are in good agreement with the experimental results.

在经典墙体抗剪理论的基础上，提出了这种墙体的抗剪承载力计算公式。其计算结果与试验结果吻合良好。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。