因为它们的两副翅膀叠在一起，在空气动力学的理论中，这意味着它们对自己身体缺乏控制力。
Because their two sets of wings effectively flap as one, that in theory gives them little control over the aerodynamic forces on their body.
其他的一些研究人员，如威斯康星大学的伊丽莎白·罗伯茨(Elizabeth Roberts)和她的同事，已经做了踢球的动力学分析，同时考虑到力的作用。
Other researchers, such as Elizabeth Roberts and co-workers at the University of Wisconsin, have done dynamic analyses of kicking, taking the forces involved into account.
的确鸟儿尾巴一样的飞机尾部改善了空气动力学性能，缓解了机体和机翼的阻力，同时还大大的增加了向上的力，缓释了由于飞机本身和货物重量而产生的向下的力。
But it was a birdlike tail that really amped up the aerodynamics, dampening the drag from the body and wings, as well as boosting the lift that lags under vehicle weight and cargo load.
摘要：机器人动力学是对机器人机构的力和运动之间关系与平衡进行研究的学科。
Abstract: for the robot dynamics is to study the relation between the force and movement and balance of the subject.
动力学是一个专业用语。它是关于运动，能量，与力的科学研究。
Dynamics is a technical term. It is the scientific study of motion, energy, and forces.
作用在任意运动物体（系）上的力和力矩可以分别表示成流场中动力学涡量的一阶矩和二阶矩随时间的变化率。
The force and moment exerted on the solid body are expressed as the rate of change of the first-and second-order kinetic vorticity moments, respectively.
它与经典动力学“力改变运动”的概念合并，将获得宇宙运行自洽的科学原理，而无需“第一推动力”的假设。
It with classic dynamics "force change the movement" of concept, will merge the self-consistent universe scientific principle, without the hypothesis of "the First Driver".
近年来，医学研究已经把很多注意力放在心脏动力学的混沌上。
In recent years, medical research has drawn more attention to chaos in cardiac dynamics.
在无限短转子-轴承的基础上，考虑基础在垂直方向的变形，通过分析油膜力，建立了转子-轴承-基础非线性动力学模型。
On the assumption of short bearings, consideration the vertical deformation of the foundation, the coupled nonlinear dynamic model of the rotor bearing foundation system is formulated in this paper.
摩托车曲轴组件动力学特性决定于惯性力椭圆主轴倾角和不平衡率两个参数。
The dynamics characteristic of the motorcycle crank module was described by these two parameters - the obliquity of the ellipse principal axis and the unbalance rate.
这为进行转子-轴承系统的非线性动力学分析时选取恰当的油膜力模型提供了理论指导。
This is very helpful to choose suitable nonlinear oil film force model in the dynamic analysis for rotor-bearing systems.
对汽车在刹车减速过程中刹车力与减速度的关系以及车轮的制动模型作了初步研究，建立了动力学模型。
The relationship of brake-force and deceleration and the brake model of wheels are studied, and dynamics model is made.
神经网络是一个非线性动力学系统，在许多方面都表现出强大的生命力，特别为信息科学界所瞩目。
Neural Network is a non linear dynamics kinetics system, which can do a lot of complex jobs, especially in information science.
研究结果为在实际旋转机械转子-椭圆轴承系统进行非线性动力学分析和设计时，选择油膜力模型提供了依据。
The foregoing provides a basis for the selection of oil-film force model during the nonlinear dynamic analysis and design of an actual rotating mechanical rotor-elliptic bearing system.
建立了螺旋锥齿轮研齿过程的动力学模型，求出了动态研磨力的大小。
The dynamic model of the lapping was setup, and the dynamic lapping force was calculated.
探讨了不同来流速度和系缆长度对于船只的动力学响应和系缆力的影响。
The influence of different current velocities and mooring line lengths on the dynamic response of vessels and mooring force was investigated.
对物体运动及改变或引起运动的力的作用的科学研究叫做动力学。
The scientific study of the motion of bodies and the action of forces that change or cause motion is called dynamics.
本文主要对双螺杆磨浆机的动力学参数(流率、功耗、螺杆扭矩和轴向力)进行了研究。
The paper focuses on the study of dynamics parameters that include flow rate, power consumption, torque and axis force of twin screw pulping extruder.
本文通过水动力学分析及实际资料分析，认为现存的水流挟沙力多值关系的说法是存在问题的。
Through the analyses of hydrodynamics and natural data, it can be considered that the concept that the sediment carrying capacity of flow has many values is questionable.
计算结果与实验测量的比较表明：正向动力学方法可将肢体运动状态、肌肉收缩力、神经控制信号等联系起来，求解人体步态的控制模式。
The results show that forward dynamics theory can model the limb movements, muscular forces and neural control signals to simulate the control of a natural gait.
剪切波状液膜作为一种重要的液膜流动形式，因受界面剪切力的影响，其水动力学特性和流动稳定特征与自由降膜流动明显不同。
The sheared wavy liquid films, as an important flow, have notably different hydrodynamics and flow stability under interfacial shear stress from those of free falling liquid films.
目的研制三七总皂苷生物黏附片，考察其体外释药动力学、对离体肠黏膜的黏附力。
OBJECTIVE To prepare the Panax Notoginseng Saponines (PNS) bioadhesive tablets, and to study their release kinetics and bioadhesive tablets force to rabbit small intestine in vitro.
提出了静电场力可作为动力学条件促进化学反应的新概念。
The new concept of chemical reaction promoted by electrostatic field force as dynamic mechanical condition is put forward.
利用有限元法建立了力传感器的动力学方程。
The dynamic equation of force transducer is set up by using the FEM in this article.
研究了两类不同免疫方式下具有饱和传染力的SIR流行病模型的动力学行为。
The dynamic behaviors of a kind of SIR epidemic model with two different vaccination strategies and saturation infectious force are researched.
三轴汽车；汽车动力学；响应；转向特性；侧偏力；
Three axle vehicle; Vehicle dynamics; Response; Steering character; Cornering force;
文中给出了钻压和转速对预弯曲动力学防斜打快钻具组合防斜力的影响规律。
Also, it is described the influence of bit pressure and rotate speed on anti-deviation force of the BHA of anti-deviation and fast penetration with pre-bending dynamics.
通过变加速方法降低惯性力，提高了机床的静刚度，改善了机床的动力学性能。
Then the inertia force is reduced by the inconstant acceleration, so that the static rigidity of the machine is raised and the kinetic performance of the machine is improved.
以间隙动力学指标作为目标函数，以理想机构惯性力平衡的优化计算，模拟反映了运动副间隙对四杆机构动力特性的影响。
An optimized calculating method for inertia force balance in ideal mechanism takes the interval dynamics norm as the goal function and simulates the effect of the interval in the motion join.
运用空气动力学原理，对标枪的纵轴旋转与压强阻力、偏向力、上升力及稳定性的关系进行分析研究，以更好地指导运动训练的实践。
The paper elaborates on the relations between the revolve of Javelin and pressure resistance, deflection force, ascensus force as well as stability.
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