数学模型

A new accurate exterior trajectory model was studied based on the formertrajectory model considering eccentricity of acceleration of gravity etc.

本文在已有弹道数学模型的基础上，研究了地球为椭球体时重力偏心，全面考虑了重力偏心及以往在射程和弹道高不大时忽略的"小量"，建立了高空远程弹箭的较精确弹道数学模型。

According to spatial analytic geometry,the mathematical model of intersecting of pipe and cone was established.

利用空间解析几何的原理建立了管锥相贯数学模型，用参量方程描述了管端相贯线焊接坡口的几何形状，该数学模型可应用于三轴联动火焰数控切管机。

The calculation results anastomose experimental data and prove the reliability of the model again.

用建立的喷雾反应过程数学模型计算所得结果也与实验数据相吻合，验证了该数学模型的普遍性。

The mathematical model was verified in experiment with the method of indirect squeeze cast Archimedean spiral proof sample. And the experimental results show that the maximum deviation between the theoretical value and measured value is less than 8%. This model can be used for quantitative analysis and estimating effects of the craft factors on the filling ability, and can also predict the maximum filling length. It has the important reference value to design the semi-solid alloy rheoforming technology and mould.

采用间接挤压铸造阿基米德螺旋线试样的方法对该数学模型进行了实验验证，实验结果表明：理论计算值与实验测定值之间的最大偏差小于8%；该数学模型可以定量分析和估算工艺因素对充型能力的影响，并可预测充型极限长度，这对半固态合金流变成形工艺设计和模具设计都有参考价值。

Caculation of principle error of involute profile processed by Archimedean hobbing cutter ;2. The equation of single hobbing cutter 's locomotion locus and the mathematical model of its instantaneous cutting area are established.

建立了单把滚刀旋切运动的轨迹方程和瞬时切削面积的数学模型，在此基础上对旋切面积的数学模型进行分析及简化，为旋切技术的实际应用提供了有力的依据。

The complicated curve parts of the neckline and armhole of the garment prototype for female bodies have been studied and the accurate mathematic models have been built.

对原型结构图中结构复杂的领口线、袖孔线等曲线段绘制的数学模型进行深入探讨，并给出科学精准的数学模型。

In the modified drift flux model both the acceleration by gravity and the acceleration of the average volumetric flow were taken into account for the calculation of the drift velocities.

为计算漂移数学模型中的汽相速度，综合考虑了重力和流体本身的加速作用对汽相漂移速度的影响，故该漂移数学模型可用于分析多维汽液两相流。

Based on the classical theory of interior ballistics , the model of this device is built.

以某种新型的燃气式活塞弹射机构为研究对象，运用经典内弹道学理论分析了整个弹射过程，建立了弹射机构的数学模型，并对该数学模型进行仿真。

We also illuminated the principle of each method, and listed corresponding mathematical model as well as basic solution process.

详细分析了三类方法的基本思想，根据其基本思想给出了相应的数学模型及数学模型的基本求解步骤。

The available WRV models such as shadow price model, marginal opportunity cost model, reproduction model, income present value model and supply-demand price model are introduced, and their principle, applicability, merits and demerits are analysed. And then, this paper discusses various factors which may have influence on WRV. Finally, this paper establishes the fuzzy model of WRV.4. Based on the real situation of China, this paper deals with the problems of sustainable utilization of water resources.

指出现有的影子价格模型，边际机会成本价格模型，再生产模型，收益现值模型，供求定价模型等水资源价值模型各自的模型原理、适用性及其优缺点，然后在此基础上论述有关因素对水资源价值的影响，指出水资源价值的模糊属性，构建了水资源价值模糊数学模型。

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。