查询词典 time scale

This main approach is also coincidence degree theory. Moreover, when the time scale T is chosen as the sets of real or integer numbers, the existence of periodic solutions for its differential or difference equation are obtained respectively.

若分别选取时标T为实数集或整数集时，则分别得到它的微分方程或差分方程周期解的存在性，这就避免了对这些生态系统的微分和差分方程周期解的存在性分别进行讨论。

In mathematics, the time scale calculus is a differential equation and differential equations in a uniform.

在数学中，时标微积分是差分方程和微分方程的一种统一。

The two extreme structures --- and others with intermediate dihedral angle --- do exist, if one considers an instantaneous time scale.

这两个极端的结构---和其他中间二面角---确实存在，如果考虑到瞬间的时间尺度。

Effects of the time-scale truncation and errors of experimental data on the discrete relaxation spectrum are presented.

数值计算结果表明用这种新算法得到的离散松驰谱更有效可信。

Based on the theory of large eddy simulation and the method of VOF , the initial breakup process of fuel liquid jet, which eject from the nozzle exit at the time scale of micro-second level, is investigated. The mechanism of primary atomization is analyzed, and the initial breakup model of liquid jet is presented. By modeling and numerical simulation of atomization for a diesel nozzle under the given conditions, the initial umbrella-like spray shapes are obtained, which fits better with the experimental results. Meanwhile, the droplets secondary breakup process, such as leeward RT breakup, dumbbell-like breakup and droplets coalescence, etc. are exhibited visually.

基于大涡模拟LES理论和VOF方法，考察了燃油喷雾初始时刻即时间尺度为微秒级的液柱破碎过程，分析了初始破碎的机理，给出了该时间尺度下液柱初始破碎过程的模型；通过对一特定条件下的柴油机喷油器的建模和喷雾过程的大涡数值模拟，获得了液柱初始时刻"伞状头部"的喷雾形态，所得计算结果与相应的试验数据符合较好；数值模拟还直观地展现了液滴背风RT破碎、哑铃型破碎以及液滴的聚集融合等液滴的二次雾化过程。

Unless a company has a genuine scientific or technological advantage, preferably one that can be protected by a patent, competitors can more often than not match any incremental change in an ever-shortening time-scale.

除非公司有先天的科学或技术优势，最好是能够受到专利的保护，否则在大多数情况下，竞争对手都能在不断缩短的时间内赶上任何微小的变化。

Therefore, we should control the exclosure time scale well to exert its positive effects on recovery of degraded grassland and avoid the negative influences on grassland due to the improper utilization of exclosure measure.

对围封作用要有全面的科学认识，把握好围封的时间尺度，以充分发挥其在退化草地恢复中的作用，避免由于利用不当而对草地产生的负面影响。

To enhance the accuracy of prediction of the futurology, it was necessary to capture the constant factors in the human society in order to clarify the positioning of a host of future variables in the time scale.

要提高「未来学」进行预测的准确度，关键是要掌握人类社会中「恒不变」的因子，才能厘清众多未来变数在时间尺度上的定位。

The magnetic field also varies on a century time scale, never aligning exactly with the geographic north pole.

磁场也改变一个世纪的时间刻度，从来没有与地理学的北极重合。

Then, the nonlinear Landau damping in the quark-gluon plasma is studied using the multiple time-scale method.

通过计算，论证了多时标方法用来讨论夸克胶子等离子体中的非阿贝尔非线性效应的有效性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。