查询词典 numerical constant

The real-world joints in the aircraft structure usually consist of multi-row fasteners. This thesis builds the 3D FE contact analysis model of a typical aircraft joint with three-row countersunk screws, and studies pin-load distribution and stress characteristics under constant and varied cross-section thicknesses as well as with and without pre-tighten screw conditions for the joint. Many applied pin-load numerical distribution laws for different conditions in the joint are recognized.

本文对典型的多排沉头螺钉接头建立了三维有限元接触分析模型，对螺钉的钉载分布在截面等厚度和变厚度、无预紧力和加预紧力多种情况下进行了数值计算分析，给出了诸多实用化钉载分布规律。

Numerical simulation of electroosmotic flows in a straight channel and a constant radius turn were carried out.

最后，文章综合分析了引起弯道效应的诸多因素，对几种消除弯道效应的方法进行了比较。

According to by the time series estimate power spectral density\'s periodogram law principle,the research adopts five level of orbital power spectra which US Federal railway Administrative bureau FRA proposed;then,through the Fourier inverse transformation,the orbital not smooth time domain samples are obtained, which determine the track irregularity peak-to-peak value and the corresponding wave length; on the basis of the research,the influence of the wheel track dynamic contact force are considered.Based on the orbital roadbed coefficient\'s definition,computation model is established to solve the roadbed equispaced spring constant,and the roadbed uniform spring stiffness is obtained by using the numerical simulation method.Finally,based on the Matlab procedure platform,the computational procedure is established,and the load time interval caused by the moving train acts on the roadbed is obtained.

根据由时间序列估计功率谱密度的周期图法原理，采用美国联邦铁路管理局FRA提出的五级轨道功率谱，通过Fourier逆变换得到轨道不平顺的时域样本，确定了轨道不平顺的幅值及对应的波长，以此为基础考虑轮轨动态接触力的影响；基于轨道路基系数的定义建立了求解路基均布弹簧刚度的计算模型，采用数值模拟得到了路基均布弹簧刚度；最后，基于Matlab程序平台编制了计算程序，得到了运行列车作用到路基上的荷载时程。

Model, then calculated the tidal consistent constant and saved as map layer as the data for tidal fast prediction. The result of comparing the model result and investigative data indicated its rationality.Later applied the model in the numerical predication of sinkable chemicals spilled beside ZhuHai region.

分析近海水域环境污染扩散数值模拟的研究应用现状基础上，根据沉降型化学品的性质及其在海上的行为特点，分别建立沉降型化学品行为数值模拟的对流扩散方程模式和粒子拉格郎日迁移模式，确定求解方式并将其软件化。

Therefore, the hybrid method was adopted to determine the equivalent material properties. In this paper, the modal testing and numerical analysis were applied to obtain the Frequency Response Function and to calculate the equivalent spring constant and damping ratio of the suspension.

因此本文针对汽车悬吊部分，先以模态试验法与数值分析方法，将悬吊部分以线性弹簧及阻尼来模拟，并使用混合法，结合实验与数值之结果进行参数调整，在此是以FRF Base 来实施参数调整，确立悬吊系统的等效弹簧系数与阻尼系数。

It is expected that the ceramic candle filter has an extensively application. A one-dimensional constant filtration flow model is established. Based on this model, the numerical calculation for the candle filter whose section is cylindrical and conical is carried out.

在高温高压条件下清除含尘气体中的微细尘粒，有效的方法是使用陶瓷过滤器，陶瓷过滤器是最具发展潜力的气固分离装置，除尘效率高达99.9 %，在高温气体净化领域有着广阔的应用前景。

In this paper, the analytical solutions of reservoir pressure in Laplace space are developed for planar linear flow and radial flow under the condition of constant pressure at inner and outer boundaries, and the pressure distribution curves in some point in the reservoir are obtained using Stehfest numerical inversion algorithm of Laplace transforms.

本文在内、外边界定压的条件下得到了平面单向流和平面径向流两种渗流形式在拉氏空间的解析解，利用Ste hfest数值反演方法给出了地层各点的压力分布曲线，由这些曲线可以清楚地看到流体的流动由不稳态流向稳态流过渡以及最后达到稳态流的过程。

A numerical calculation method to solve the cascade equation was presented. Analytical solution to the cascade equation was obtained in the case of quasi-ideal cascades, that is, the cascades with a constant partial cut at all stages.

各级组分分流比不变的多组分级联称为准理想级联，得到了计算存在损耗的准理想级联中相对产品流、相对贫料流、级联中总物质流量以及产品流和贫料流中组分丰度的解析表达式。

A numerical calculation method to solve the cascade equation was presented.Analytical solution to the cascade equation was obtained in the case of quasi-ideal cascades,that is,the cascades with a constant partial cut at all stages.Formulas were given for the calculation of the relative product and waste flows,the total substance f...

各级组分分流比不变的多组分级联称为准理想级联，得到了计算存在损耗的准理想级联中相对产品流、相对贫料流、级联中总物质流量以及产品流和贫料流中组分丰度的解析表达式。

By field and indoor test, the paper measures soil physical property, soilmoisture constant and soil water movement parameter, provides the soil specificgravity , the soil apparent density, the soil fraction, the soil field moisturecapacity, the soil saturated moisture capacity, the soil percent moisture content ofcom germination and seedlings emergence, the corn wilting point, and alsoestablishes the equation of soil water retention curves, the equation of soil waterdispersion coefficient and the relationship between pressure and soil apparentdensity, and so those provides the parameter for numerical simulation.

通过田间和室内试验，测定了供试土壤的物理性质、土壤水分常数和土壤水分运动参数，得到了该土样的比重、容重、机械组成、田间持水率、饱和含水率、玉米种子发芽出苗土壤含水率、玉米凋萎系数，给出了土壤水分特征曲线方程、土壤水分扩散系数方程及土壤容重与土壤压紧力的关系，提供了数值模拟过程中所需的参数。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。