电磁飞机弹射系统相对于传统的蒸气提供动力的弹射器拥有多项优势。蒸气弹射器重新充满能量非常慢，而且很难调节。
EMALS has several advantages over conventional steam-powered catapults, which are slow to recharge and difficult to adjust.
本文研究了平面多项式向量场的全局与局部分叉，旨在研究高次平面非线性动力系统多极限环的存在性以及极限环的个数及其相对位置关系；
The main aim of this dissertation is to study the exist of limit cycles of plane nonlinear dynamic system of high degree and the number and the configurations of limit cycles.
建立了七次多项式动力凸轮型线的优化设计数学模型；
The mathematical model of optimizing design for hepta polynomial dynamic cam was established.
数值模拟结果与数值解比较表明：正交多项式逼近法能有效地解决此类非线性随机动力系统的响应问题。
Numerical simulation implies that the proposed method is a new effective approach to dynamical responses of stochastic nonlinear systems.
结果表明，采用高次多项式动力凸轮用于高速汽油机凸轮设计，能够获得相对平稳的气门运动特性。
The research results reveal that comparative valve balanced movement characteristic can obtain using high order polynomial dynamic cam in high speed gasoline engine.
多项式是一种特殊的有理函数，因而具有许多特殊的动力学性质。
As a kind of special rational functions, polynomials have a lot of special and attracting dynamical properties.
本文主要研究双二次多项式的动力系统。
D dissertation is concerned with the dynamics of biquadratic polynomials.
设备动力用压缩空气，执行元件用电磁阀控制气缸以完成多项功能；
The wholw machine is driven by compressed air and air cylinder is controlled by electromagnetic valve by finishing multiple functions.
在利用多项式样条插值方法进行动力学系统的轨迹规划时，存在无法处理动力学约束的问题。
When using a polynomial spline to plan the trajectory of a dynamic system, it is very difficult to manage dynamic constraints.
设备动力用压缩空气，执行元件用电磁阀控制气缸以完成多项功能；
The whole machine is driven by compressed air and air cylinder is controlled by electromagnetic valve by finishing multiple functions.
采用单切面实时超声显像法对20例慢性胆囊炎及30例胆囊切除术后患者，进行了流体餐胃动力学多项指标检测。
Gastric motility functions in 20 patients with chronic cholecystitis, 30 patients with cholecystectomy and 25 normal controls were studied by ultrasonography(US).
采用单切面实时超声显像法对20例慢性胆囊炎及30例胆囊切除术后患者，进行了流体餐胃动力学多项指标检测。
Gastric motility functions in 20 patients with chronic cholecystitis, 30 patients with cholecystectomy and 25 normal controls were studied by ultrasonography(US).
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