Empirical formula about flame propagation speed in tube is obtained.
5分析了多层丝网结构对管内传播中的火焰的淬熄能力。
The analytic formula of propagation constant for all modes in the waveguide is presented, which includes the effects of the thickness of the lossy layer.
在考虑了损耗层厚度影响的情况下，得到了各模式传输常数的近似解析表达式。
The text derives the formula and method of confirm from radar to objective radio-wave radial track description from relational mathematic theorem and radiowave propagation theory, and an example is given in the end.
本文根据有关数学定理和电波传播理论，推导并给出了确定雷达到目标电波传播射线轨迹的公式及方法，最后给出了一个实例。
At present, crack propagation life analysis depends on the Paris's formula, which needs the stress intensity factor amplitude function. In the engineering, the SIF function is simplified. A new method to determinate the function is put forward.
目前的机械结构裂纹扩展寿命分析方法主要是基于Paris公式的，它需要确定应力强度因子幅值的数学表达式，工程应用采用简化方法计算求得。
The calculating formulae were derived according to random field theory and variance propagation law for the variability of the empirical formula itself and the empirical formula considering the self-correlation of the number of DPTs, with the statistical parameter of pile end diameter given.
根据随机场理论和协方差传播律，推导出了考虑动探击数自相关性的经验公式变异性的计算公式和经验公式本身变异性的计算公式，给出了桩端直径的统计参数。
Based on the generalized integral formula and the complex Gaussian expansion of the aperture function, an approximate analytical propagation formula for a Lorentz beam passing through a circular-apertured misaligned paraxial optical system is derived.
周国泉 浙江林学院理学院，临安 311300基于广义衍射积分公式和光阑函数的复高斯展开，导出了一洛伦兹光束经一个带圆形光阑失调傍轴光学系统的近似解析传输公式。
In the new method, the states output probabilities of Continuous Density Hidden Markov Model are used as the input of the Back Propagation neural network. On the one hand, the BP neural network does not need a clear formula, because it can find out the intrinsic relationship between the input and the output by training and learning, according to the provided data. On the other hand, Discrete Hidden Markov Model will produce the quantization error, so the CDHMM/BP neural network hybrid model is adopted, for it takes advantage of the time domain modeling ability of the CDHMM and the strong classification ability of the BP neural network, and considers the characters of different classification sufficiently.
一方面由于BP神经网络能够根据提供的数据，通过训练和学习，找出输入输出的内在关系，不需要一个明确的数学解析式；另一方面由于离散隐马尔可夫模型会产生量化的误差，所以采用连续密度隐马尔可夫模型和反向传播神经网络相结合的方式，充分利用了CDHMM的时域建模和BP神经网络强大的分类能力，同时充分考虑了孤立词语音的类间特性。
The procedure consists of the following steps: Firstly, classify horizons by acoustic wave, density data and so on, build up depth-time relationship, and calculate reflection coefficients in frequency domain through the reflectivity formula derived from elastic wave propagation equation of multiple horizontal media.
总结归纳深度域合成记录制作过程应包括：（1）利用声波、密度等测井曲线进行层位划分并建立深时关系，根据多层介质反射系数的波动方程推导公式，求取频率域的反射系数；
A study on the prediction of corrosion fatigue life has been carried out by applying the crack propagation rate formula for fatigue to corrosion fatigue.
将有效的疲劳裂纹扩展速率表达式应用于腐蚀疲劳，对腐蚀疲劳裂纹扩展寿命估算进行了初步探讨。
Based on the Collins formula, the propagation expression of astigmatic Cosh-Gaussian beams passing through a bifocal lens system is derived.
基于Collins公式，推导了有像散双曲余弦高斯光束通过双焦透镜系统后的解析传输公式，分析了该光束轴上光强分布和焦移。
By the use of Pris formula and in consideration of the influence of high cycles on low cycle fatigue crack propagation, the damage tolerance life of the blade is obtained.
利用Paris公式并考虑到高周振动应力对低周疲劳裂纹扩展的影响求得叶片的损伤容限寿命Nf。
A novel stationary variational formula in spatial domain and in spectral domain respectively for calculation of planar line propagation constant is presented based on the exact theory of electromagnetic field.
基于严格的电磁场理论，给出了一种新的分析平面传输线传输特性的空域及谱域的稳定变分公式。
At last, researching the stress wave propagation velocity in burned-cut blasting and the process which rock throw out the hold, the author deduced to the theoretical formula of differential delay time between different breaking-in hole.
再次，研究了直线掏槽爆破中应力波传播速度和岩渣的抛出过程得出各掏槽孔之间微差爆破时间间隔的理论设计计算公式。
This paper expresses membership function in the network by trapezium trapezoid formula. The network is trained using the improved back propagation algorithm, which can get better efficiency and effect.
采用梯形公式的四元组形式表达网络中的隶属函数，利用反向传播算法训练网络，得到较好的训练效率和效果。
The formula shows that the propagation error from biquadratic polynomial is the same as the error from linear polynomial.
公式表明，不完全双二次多项式的DEM传递误差与双线性多项式的传递误差相同。
Based on the interpolation method, a model to represent the surface of a grid DEM based on biquadratic interpolation polynomial is obtained, and a propagation error formula by the polynomial is derived.
基于函数插值方法，得出了基于不完全双二次插值多项式的规则格网数字高程模型（DEM）的表面表达模型，并推导了相应的传递误差公式。
The paper also discussed the quality propagation of project operation, and represented the propagation formula with error rate before and after quantization separately.
并研究了投影运算对正确性评价指标的质量传递影响，定量地给出了传递关系，分别对用量化前后属性错误率进行了表示。
The model describes the measure for these uncertainty factors in user authentication procedure. Aiming at some important and especially secure systems needing several authentication mechanisms, this paper gives and demonstrates the parallel propagation formula of authentication trustworthiness factor.
该模型对认证过程存在的不确定性因素给出了度量，针对需要多种认证机制的重要、特殊系统给出了认证可信度因子在多认证机制之间的传播公式，并进行了证明。
The image impedance and wave propagation in the coupled meander line of length 4 are discussed, and an approximate formula for calculating the characteristic impedance of odd-even mode, Z, is given.
讨论了4偶合弯曲线的像阻抗和波的传播问题，并给出了奇偶模特性阻抗Zoe的近似计算公式。
The detailed propagation formula of the state estimation error and its variance matrix are derived.
详细推导了状态估计误差及其方差阵的传播模型。