查询词典 arc hyperbolic function

Applying theories of numerical analysis and higher geometry, the corresponding mathematical model of stem line is established according to different stems. Whereby, the centers, radii of the arc and its tangent points with the water-line can be found and the curve of arc radius is thus determined. A general formula for expressing stem curved surface is introduced.

应用数值分析和计算几何理论，根据船体首部线型特点，建立首柱轮廓线数学模型；计算水线首圆弧圆心、半径和切点，确定首圆弧半径线；给出首部曲面的通用方程式。

All these results lay a foundation for the improvement of arc welding technology and arc waveform control.

分析结果可为改进焊接工艺和波形控制方法提供依据。

Products are mainly used for arc welding, argon arc welding and other fields.

产品主要用于电弧焊、氩弧焊等领域。

The induction periods and particulate fouling asymptotic resistances of arc line tube were obtained by comparative experiment under various particulate concentration and liquid velocity. The flow field and shear stress in the arc line tube were numerically simulated and analyzed.

文中通过不同流速和微粒浓度下微粒污垢的加速实验，得到了弧线管微粒污垢渐近热阻值和诱导期；同时，用数值方法模拟了弧线管的内部流场和壁面剪切力。

This paper analyzes the characteristic of the Power Factor Correction of arc welding inverter power source , introduces the 12-pulse converter based on delta-type autotransformer connection into arc welding inverter power source ,and its configuration, design scheme and theory on PFC.

分析了弧焊逆变电源功率因数校正技术的特点，阐述了弧焊逆变电源中基于差接三角形自耦变压器十二脉波整流电路的原理与设计及其功率因数校正机理。

In this paper,a study is given to the relationship between vacuum arc current and axial magnetic field keeping the vacuum arc diffuse,a formula of the relationship is deduced.

本文研究了真空电弧与使其保持扩散型的纵向磁场间的关系，并得出了电弧电流与纵向磁场间的关系式。

According to the electric field intensity,arc current,combining bidimensional heat transfer model,the neutral particle temprature,arc section area and non-equilibrium degree of plasma were calculated and compared with our work.

对实验结果进行了分析和处理，根据测量的电弧电场强度、电弧电流，模拟了中性粒子温度、电弧截面面积和等离子体非平衡度的关系式，与实验结果相符。

The works in the project just done can be summarized as five respects.(1) A device was designed to fabricate the asymmetrical resonant cavities by a pendant drop. A series ARCs with variable parameters provides a valuable experimental method for investigating the characteristics of ARCs.(2) The relationship between the number of active modes and the shape parameters in an ARC was investigated. The experimental lasing threshold was compared with theoretical result, the good agreement between two shown that it was the decrease of the number of active modes in an ARC that decreased lasing threshold.(3) Dye lasing gain was used to enhance the signals of stimulated Raman scattering of the weak gain Raman modes in a circular cavity made by a pendant drop, the instantaneous SRS spectra of weak gain Raman modes in ethanol was obtained by this new method.(4) The SRS signals of minority compound in a binary chemical complex was obtained by using dye lasing gain method. The detection concentration of minority compound was reduced to an order compared with normal SRS method.(5) A cylindrical circular cavity was formed by a liquid jet, which was used to reduce the pump intensity required for laser induced plasma spectroscopy. The limit of detection of trace element in aqueous sample was greatly decreased by this new method.

我们设计并成功制作了使悬垂液滴连续变形的装置，用此装置可以方便地改变非圆对称谐振腔的几何参数，为ARCs的研究提供了一种有效的实验方法；研究了ARCs中活性模式数和变形参数间的变化规律，激光阈值的数值计算结果和激光辐射的实验结果作了比较，二者吻合的曲线说明ARCs中活性模式数量的减少是受激辐射放大阈值降低的原因；在由单元化合物构成的微型圆对称谐振腔中，首次尝试用"激光增益"增强弱增益拉曼模式的受激拉曼散射信号，获得了乙醇分子中弱增益拉曼模式的瞬态SRS光谱；在由二元混合物构成的微型圆对称谐振腔中，用染料的激光增益增强了少量化合物的SRS信号，把少量化合物的SRS信号探测浓度降低了近一个数量级，在SRS应用于瞬态过程的组份分析方面做了卓有成效的探索；用石英毛细管形成的稳定液拄构成拄形谐振腔，降低了激光诱导等离子体光谱需要的激励能量，有效地降低了水相样品的痕量元素分析极限，为LIPS应用于微量元素的化学分析开拓了一条新的技术路线。

This is L' Arc de Triomphe, the biggest obstruction in Paris, or maybe in Europe. L'arc de triomphe is a HUGE roundabout, and I have to cross it to the other side to get to Bois de Boulogne.

这是凯旋门，巴黎境内最大的路障~凯旋门是个很巨大的圆环，而我必须穿越它才能到Bois de Boulogne。

The results indicate that electric erosion of contact wire by static arc and moving arc varies from one another.

结果表明，静止电弧和运动电弧对接触线的电气侵蚀程度不同。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样