查询词典 Brownian motion

Think that the workpiece dimension composes in reply weight comparatively the hour, the displacement from the cutter realizes host motion , the displacement realization from workpiece feeds motion , the shaper and the slotting machine are that such motion assigns a form.

当工件尺寸和重量较小时，由刀具的移动实现主运动，由工件的移动实现进给运动，牛头刨床和插床就是这样的运动分配形式。

The methods are based on biomechanics. The joints of human body were categorized according to the motion characteristics. Motion parameters estimated from sensor data were used to control the movement of human skeleton model and the deformation of skin model, and consequently reconstruct the human body motion in real-time animation.

该方法以生物动力学为基础，根据人体关节的运动特征进行分层表示，采用传感器数据驱动并控制人体骨架模型的运动以及皮肤模型的变形，实时再现真实人体运动。

Now, their motion states will change, such as their motion velocities、accelerations and motion directions.

此时，其运动状态将发生改变，表现为速度、加速度、运动方向的改变。

Researching automatic screen printer,this paper proposes a hardware architecture of motion control system of automatic leadfree screen printer based on PLC,completes software design of motion control system, introduce FSM thinking in the programmingprocess,not only simplifies programming,but also guarantees the stability and reliability of system effectively; solves the problem ofabsolute positioning when motor need switching frequency, guarantees operating speed and motion control accuracy of system.

以全自动锡膏印刷机为研究对象，提出了基于PLC的印刷机运动控制系统的硬件体系结构，完成了运动控制系统的软件设计，将状态机思想引入于PLC程序的编写中，不仅简化了编程，而且有效保证了系统的稳定性及可靠性；解决了电机需要切换倍频时的绝对位置定位问题，提高了系统的运行速度及运动控制精度。

It has been proved that Reichardt's Elementary Motion Detector can perform figure-ground discrimination efficiently, and Wavelet transform analysis is similar to the multi-frequency channel of human vision. So we combine EMD, Wavelet transform and Pyramid image processing together, to propose a new motion estimation algorithm. The computer simulation results reveal that the proposed algorithm can well simulate vistual motion evaluation.

本文利用Reichardt的相关型初级运动检测器二维阵列可以有效地进行图象－背景相对运动分辨的特点，以及小波变换的频谱分析特性与人类视觉多频率通道特性相类似的性质，将EMD模型、小波变换和图象的塔式结构处理有机地结合起来，提出了一种类似视觉信息加工方式的新的运动分析算法。

On the basis of propulsive model,a mathematical model which is used to describe the motion of pitching and heaving of dolphin's caudal fin by ways of coordinate transformation is deduced.Meanwhile,this model can show the relationship between the motion of caudal fin and parameters related,then the motion of caudal fin of dolphin is simulated by the software of Matlab which showed the swimming principle.

以海豚背腹式摆动推进方程为基础，应用坐标变换的方法，建立了描述海豚尾鳍俯仰－沉浮运动的数学模型，同时建立了描述豚尾各运动参数之间关系的方程，随后运用Matlab的仿真功能再现了海豚在游动过程中尾鳍的运动规律。

Nonlinear partial differential dynamic equations of bending vibration of a tilting stepped drive shaft with two supports were built under non-inertia movement coordinate system by theorem of the motion of mass center and Heaviside function. According to the condition of equal displacement in an adjoining plane of the shaft, an equivalent shaft and its equation were obtained. A motion equation of the equivalent shaft was obtained by method of Galerkin. An approximate steady-state solution of the main resonance was obtained by method of multiple scales. The influence factors, motion stability, amplitude jump of main resonance of a stepped drive shaft and so on were analyzed.

用质心运动定理、Heaviside函数建立了非惯性系下倾料两端支承阶梯传动轴的非线性弯曲振动偏微分动力学方程，并根据相邻轴段的衔接面处位移相等的条件，得到阶梯轴的当量轴及其动力学方程；用Galerkin法得到当量轴的弯曲运动方程，用多尺度法求得稳态下当量轴的主共振的一次近似定常解，分析了影响阶梯传动轴主共振的因素、运动稳定性、振幅突变性等。

Finally, a stochastic averaging method based on generalized harmonic functions has been introduced and applied to the study of dynamics of Brownian particles.

最后，本文介绍了一种基于广义谐和函数的随机平均法，并将它初步应用于受宽带噪声激励下的Brown粒子随机运动系统的研究。

The Brownian movement of pollen also shows fractal characteristics.

和谐花粉的布朗运动轨迹也具有分形特征。

We can understand, therefore, that a quantitative study of Brownian movement can give us deeper insight into the kinetic theory of matter.

从上述情况我们可以得到这样的结论：如果对布朗运动作一个定量的研究，能够使我们对物质动理论有一个更深刻的理解。

The characteristic of the method is that driving condition and clock pulse for flip-flops are obtained at first hand by means of the state transitio n drawingand that designing asynchronous sequential cir-cuits and synchr onous sequential circuits can be unified.

时序逻辑电路可分为同步和异步，然而采用传统的时序电路的设计方法时，即使是同步时序电路的设计也需要7步[3]，要进行复杂的计算来求状态方程、驱动方程，既繁琐又容易出错；对异步设计就更为复杂了。

Rana spinosa is a kind of large economic frog which mainly lives in mountain districts of southern China.

棘胸蛙是一种主要分布在我国南方各省山区的大型经济蛙类。