斜航的

It is based on the least square method and the characteristics of loxodrome normal circular arc spiral bevel gear and combined with the theory of differential geometry.

基于最小二乘法并结合微分几何理论，针对斜航式法向圆弧锥齿轮的特点，提出了一种适合Bertrand齿廓面检测时测量点的回归法。

Above all, the meaning and value of the paper are as follows. By using FEM the stress of 3D finite model is analyzed. The trend of stress in different parts of the tooth is got and questions about the intensity of the loxodrome normal circular-arc spiral bevel gear are answered. Results of this paper give the important bases for applying the new gear into practice.

综上所述，本论文的意义与价值在于：应用有限元所提供的平台，对新型齿轮进行三维有限元的应力分析，得到该齿轮副在实际载荷下各部分应力变化规律，从工程角度回答了斜航式法向圆弧螺旋锥齿轮的强度特性等问题，为其技术实现提供重要依据。

Loxodrome normal circular-arc spiral bevel gear transmission is a typical engineering application based on the principle of Betrand conjugate surface. It is likely to be the hi-tech prototype for the middle or large spiral bevel gear.

斜航式法向圆弧螺旋锥齿轮传动是贝特朗曲面原理指导下的一类典型工程实现，可望为中大型锥齿轮传动提供一种新技术原型。

Then the numerical method is applied to predict the resistance, the lateral force and yaw moment on the ship at different drift angles in shallow water with different water depths, and the influences of the water depth and drift angle on the hydrodynamic forces are analyzed.

在此基础上，采用本文的数值方法对不同水深情况下船舶以不同漂角斜航时所受的阻力、横向力和转首力矩进行预报，并分析了水深和漂角对斜航运动船舶水动力的影响。

The flow separation occurs when theship is in oblique motion with large drift angle, so the viscous effect must beconsidered in calculating the hydrodynamic forces.

由于船舶在作大角度斜航时，流动出现分离，因此计算作用在船体上的水动力时必须计及粘性的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。