The question is what does the curl of a force field mean?
问题是一个力场的旋度代表什么？
It tells you that you cannot get energy for free out of your force field.
就意味着你不可能在力场里面无偿地得到能量。
In particular, a force field with no curl is a force field that does not generate any rotation motion.
特别地，一个没有旋度的力场，就是一个不产生任何旋转运动的力场。
And the curl of a force field tells you how quickly the angular velocity is going to increase or decrease. OK.
力场的旋度告诉你，角速度增加或减小的快慢。
So, what that means concretely is if you have a force field that conservative, then you cannot build somehow some perpetual motion out of it.
具体来讲，如果你有一个保守力场，就不可能建立起永恒的运动。
There is a force field around the arbitrary magnetic pole.
在任一个磁极的周围有一个力场。
Floatation in centrifugal force field is an advanced technique.
在离心力场中进行煤炭浮选是一项先进的技术。
We suggest to study a special kicked rotor moving in a piecewise continuous force field.
本论文建议研究一类特殊的分段连续力场中的受击转子。
A special kicked rotor moving in a piecewise continuous force field is suggested and studied.
建议研究一类特殊的分段连续力场中的受击转子。
The method of obstacle avoidance for mobile robot based on the virtual force field was presented.
提出了用虚拟力场方法来实现移动机器人的避障。
In this paper molecular dynamics (MD) simulation was applied to validate COMPASS force field for HMX.
首先通过分子动力学(MD)模拟考察了COMPASS力场对HMX的适用性。
A method of calculating force field of polyatomic molecule with model potential function is presented.
本文提出了一套用模型势函计算多原子分子力场的方法。
Introduction of vibration force field is beneficial to shorten, filling time and increase transient cavity pressure.
振动力场的引入，有利于缩短充模时间，提高瞬态模腔压力。
The viscosity of LDPE melt decreases in vibration force field and has a minimum value with vibration frequency change.
在振动力场作用下ldpe熔体的粘度减小，随振动频率的变化有一最小值。
The core of CTFM consists in how to retrieve cellular traction force field from the measured substrate deformation data.
牵引力显微镜方法的核心在于如何通过基底变形信息反演得到细胞牵引力场。
It is desirable first to consider the meaning to be assigned to the terms "consistent force field" and "equilibrium force field".
首先需要研究的是赋予术语“一致力场”和“平衡力场”的含意。
Outside helical flow microfiltration assembly is a new kind of equipment by use of centrifugal force field to enhance permeate flux.
外旋流管式微滤膜器是一种新型的利用离心力场作用强化渗透通量的装置。
There is centrifugal force field(Higee) in hydrocyclone, so it is reasonable that it can be used to intensify heat and mass transfer.
旋流器中流体沿切向进入腔体，旋转产生离心力场或超重力场，可探索将旋流器用于强化热质传递方面。
Based on the orbit equation of particle motion in central force field, the stable property and close property of orbit were discussed.
在中心势场中粒子运动轨道方程的基础上，进一步讨论粒子轨道的闭合性、稳定性。
The selective mineralization for fine particles is strengthened in the centrifugal force field, resulting in a faster floatation speed.
离心力场强化了细粒级的选择性矿化，加快了浮选速度。
Based on the existing wind power resource, it focuses on the optimum selection of generator to match wind force field and the prospective analysis.
并重点从风机选型即如何根据风力资源情况为风电场匹配最合适的风力机组方面，进行了前瞻性分析。
In this paper, a simple method of calculation is given, the method is common and can solve some questions of central force field of spherical symmetry.
本文给出了较简便的运算方法，该方法具有一般性，能解决一类球对称中心力场的许多问题。
Vibration force field was introduced into processing of plastics in tri-screw dynamic mixing extruders, so as to intensifying mixability and dispersion.
三螺杆动态混炼挤出机将振动力场引入到物料的塑化混炼挤出过程，达到强化混炼和分散的目的。
It is crucial to study the random walk behavior under a sinusoidal force field for the explanation of the response of system under harmonic disturbances.
研究正弦力场下的随机行走问题，是解释系统对于简谐微扰的响应的关键。
The agglomeration of the charged dust particle is investigated by the method of electric-fluid mechanics and the transport theory of external force field.
应用电流体力学和外力场输运理论，分析了电收尘器中带电粉尘粒子的凝并现象。
The article proceeds from the characteristic of doing work of electrostatic field strength and proves that electrostatic field is a conservative force field.
文章从静电场力作功的特点出发，说明静电场是保守力场。
The preparation method leads the stirring force field and the temperature field of the slurry to be more uniform, thereby obtaining the high-quality semi-solid slurry.
这种制备方法将使浆料受到的搅拌力场和温度场更加均匀，从而得到优质的半固态浆料。
The introduction of vibration force field in the foaming of microcellular plastics provides a new research field for the continuous extrusion of microcellular PVC foams.
将振动力场引入到微孔发泡过程为PVC微孔塑料连续挤出成型提供了新的思路和研究方向。
The calculation results show that the vibration force field play an effective role in controlling phase morphology of immiscible polymer blends during polymer processing.
计算结果表明，聚合物加工过程中引入振动力场为共混体系相形态控制提供了更为有效手段。
The calculation results show that the vibration force field play an effective role in controlling phase morphology of immiscible polymer blends during polymer processing.
计算结果表明，聚合物加工过程中引入振动力场为共混体系相形态控制提供了更为有效手段。
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