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Therefore, it is necessary to study numerical methods which preserve the symplectic structure of the Hamiltonian system.

因此,研究保持哈密尔顿系统的辛几何结构特征的数值方法是必然的。

In the paper, a numerical model is proposed for natural pulsating flow and heat transfer.

本文发展了一种模拟自激脉动流动及对流传热过程的数值方法

However, they did not give the numerical method for computing the homogenization parameters and solve the homogenization equation.

然而,他们没有给出计算均匀化参数和解均匀化方程的数值方法

To assess our numerical method, several cavitating flows over the hydrofoil were computed and the numerical results were compared with experimental results.

通过将半球圆柱的计算结果与实验数据和前人的计算结果进行对比,验证了所发展的数值方法的可靠性。

The research on numerical method for hyperbolic conservation laws is one of the important directions in computational mathematics.

中文摘要:双曲型守恒律方程数值方法的研究,是计算数学中的一个重要研究方向。

The effort of spray characteristic on rocket engine combustion stability for hypergolic propellant was studied.

数值方法研究了一甲基肼/四氧化二氮自燃推进剂喷雾液滴直径对火箭发动机燃烧稳定性的影响。

Implicit performance function ; response surface method ; reliability analysis ; numerical method

隐式功能函数;响应面法;可靠度分析;数值方法

However, most of the existing projection methods are only first order or incompletely second order accuracy in time.

目前,绝大多数不可压缩数值方法,在时间方向上都仅仅停留在一阶或不完全的二阶精度。

Aneurysms generally make use of being deposited with coil in clinic. The effects no growth 、 treatment and rupture of the aneurysm are indistinctness. The article's motive is to simulate effects before and after coiling in different volumetric ratio by computation method. We discovered that the results of the wall shear ratio and wall pressure were no variation before and after coiling.

动脉瘤置入线圈在临床医学以被广泛用於治疗,由以往文献可知在动脉瘤之成因、成长、破裂、治疗等过程之重要因素还不甚了解,本文藉由数值方法模拟放置线圈前后及线圈占动脉瘤之不同体积比之影响,其发现在放置线圈前后壁面压力及剪应力并无明显变化。

The modified expression of the broad emission-line profiles ire derived for the outflow kinematics model of the BLR driven by the radiation pressure. Taking into account the difference between the two lines HeI λ5876 and Hβ, it is shown the fact that the observed line width of HeIλ 5876 is broader than that of Hβ cannot be explained by the popular outflow BLR model evoked by W. G. Mathews. For comparison, line profiles of the gravitational infall model and orbital disk model are also calculated; the later is in good agreement with the observations Thereupon, conclusion is reached that the gravitational infall is an important process in the real BLR gas motion.

1推导了辐射压加速宽线云团径向外流,以及引力下落和转动等BLR运动学模型的谱线轮廓表达式,并考虑到光致电离计算表明的云团本身对Hβ和HeIλ5876谱线的辐射差异,用数值方法计算了它们的谱线轮廓,发现普遍流行的辐射加速气体外流模型不能解释HeIλ5876线宽大于Hβ线宽的观测事实,而引力下落模型则可以较好地解释观测,因此我们倾向于认为、径向内流运动很可能是BLR内的发射线云团真实运动的一个重要成分。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。