非公式的

Aiming at the main factors influencing the calculation results, this paper presents an algorithm for calculating the excavation and fill volume according to the classification by the abscissa monotonicity of points sequence on design lines and the ground lines.

文章首先给出了能够反应填挖属性的一个更简形式的凹凸多边形面积计算公式，然后提出了在横标单调条件下的求交追赶算法，最后介绍了非单调条件下的填挖区域分割与面积计算方法。

This dissertation gave an in-depth study to the effect of radome error upon the guidance system and gave a formula for that effect with missile dynamics of arbitrary order and unsimplified seeker model. Based on that, the critical condition for the design of guidance controller under the radome effect was derived.

本文深入研究了天线罩瞄准线误差对制导控制系统稳定性的影响，得出了在任意阶导弹动力学模型和非简化导引头模型下，天线罩瞄准线误差对制导控制系统的影响公式，并由此得出了天线罩瞄准线误差影响下导引控制器设计的极限条件。

Firstly, a formula is presented in this paper, for theultimate strength of T-shaped unstiffened CHS-RHS joint under out-plane bendingload. The yield line model based on flexural failure of the chord face, is assumed onthe basis of Von-Mises stress distribution on the chord face.

本论文在有限元数值计算基础上，根据主管表面的应力分布，假定了基于弦杆表面塑性破坏模式下的节点屈服线模型，推导了平面外弯矩作用下非加劲节点的极限承载力公式，与有限元计算结果非常接近。

To reduce the influence of an unsynchronized sample sequence on FFT and improve the precision of harmonic in a power system, the harmonic estimation based on interpolation FFT algorithm is proposed. The estimation based on five coefficients of Rife-Vincent window is discussed in detail and the formulas for estimating harmonic patameters are deduced.

由于快速傅里叶变换在非同步采样时存在较大的误差，无法直接用于电力系统谐波分析，本文提出了一种基于五项窗Rife-Vincent插值FFT算法的谐波参数估计的新方法，并推导了其谐波参数估计公式。

Numerical simulation of water injection into coal seam throughlong drill hole and determination of its reasonable parameters

用有限元数值模拟方法求解了煤层注水二维、三维非定常渗流方程，用该数值计算模型结合具体实例，主要分析了工艺参数中注水压力、时间和钻孔间距与湿润范围的动态变化关系，给出了选取合理的注水工艺参数的计算公式。

The caustics phenomena of electromagnetic wave propagation in concave reflector, the singularities of caustics, and the method of

40174032的一部分，得到如下结果：论文分析了利用Maslov方法求解非均匀介质中波动方程高频近似解的基本原理和求解过程，构造了介质系数只在一个方向变化时波动方程高频近似解的通用计算公式。

In addition, the important forms used to calculate the formation parameter s, such as shale volume, water saturation and permeability, are improved to be more suitable for the calculation of inhomogeneous formation parameter s according to the power law of fract.

同时，利用分形理论的幂定律，对泥质含量、含水饱和度和渗透率等参数的计算公式作了改进，可以更好地适应非均质地层参数的计算。

Since the initial start of buried pipelines results in three-dimen-sional unstable heat transmission , and at initial start the temperature change of the soil around a pipeline is affected by the temperature inside the pipeline and the ground surface temperature annual fluctuation, the differential equation for heat transmission and the boundary value may be line...

埋地输油管道启输过程是三维非稳定传热问题，启输过程中管周土壤温度场的变化受管内热水温度和启输前地表面温度年波幅的影响，可将传热微分方程和边值条件线性组合成两个定解问题，用电子计算机进行数值求解，得出计算公式，以确定预热阶段管路任一点任一时刻的热水介质温度。

It is relatively difficult to calculate the coordinates of an arbitrary point of an incomplete transition curve at the interchange ramp on highway.

在高速公路互通立交匝道线形设计中，非完整缓和曲线上任意一点坐标计算较为困难，通过公式推导，提出一种简易适用的计算方法，其在工程中的应用具有一定的指导作

First, an energy non-local model is presented to derive the constitutive equation of a new strain gradient theory.

首先，提出了能量非局部模型，并由此模型，得出新应变梯度理论的本构关系；其次，由变分原理，得出相应的有限元公式；再次，给出了微压痕硬度的有限元分析方法；最后，将该理论预测结果与经典理论预测结果以及实验结果进行了对比。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。