查询词典 periodic

In this Paper, the author proved the theorem: Let fbe an nonconstant periodic function of exponential type and positive lower order , and g be an entire function of finite order If g is permutable with f, then g≡for gz

本文证明了如下定理：设 f为非常数指数型周期函数，且具有正下级，g为有穷级整函数。若 f与g可交换，则 g≡ f或 g≡ z

This paper discusses the exponential stability of periodic solution for impulsive neural networks.

本文讨论了一类脉冲神经网络的周期解的指数稳定性。

China export-import bank periodic maintenance project, technical support.

5进出口银行局域网巡检，技术支持。

Periodic cleaning: Cosmetics tools, such as sponge brushes to keep clean, regular cleaning to avoid contamination. dalian escort In particular, Powder, powder puff sponge, etc. have to keep it clean, do not let perspiration residue on it. Powder puff, eyebrow brush, eyebrow pencil cleaning, can be soaked in a neutral detergent in the first 10 minutes, then placed under the faucet, wash down Tippy. Then, Qing Nie bristles, squeezing out the excess moisture, then mat towels, dry can be.

定期清洗：彩妆品工具，如海绵刷子等要保持干净，定期清洗，避免造成污染尤其是蜜粉、粉饼的海绵粉扑等更要保持干净，不要让汗渍残留在上面粉扑、眉刷、眉笔的清洗，可先泡在中性洗剂中10分钟，再放在水龙头下，顺着毛尖冲洗然后，轻捏刷毛，挤掉多余的水分，再垫上毛巾，阴干即可。

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

Based on the Knothe time function, the progressive prediction of surface subsidence due to underground mining was established, and the factor of proportionality describing the influence of geological and mining conditions was determined when there was no measured data in practice. A method of periodic pressure distance to divide the total working face into certain elements considering the mining rate or mining duration was proposed.

详细分析了单参数的Knothe时间函数、双参数的Sroka-Schober时间函数和Kowalski 广义时间函数的优缺点及其相互关系，建立了应用Knothe时间函数进行地表动态移动变形预计的原理、无实测资料矿井时间参数的确定方法和开采单元划分的周期来压步距法。

The periodic rise and fall of the sea level under the gravitational pull of the moon.

由于月亮的重力引力所引起的海平面的周期性的涨落。

Those figures indicate that when delay is very small, the stability of steady states doesn't change and chaos still exist. As delay increases, the stability of steady states is changed. When delay is near some critical value, a family of periodic solutions bifurcate from the steady state.

这些系统的相图显示了当时滞为零或者时滞很小时，平衡点的稳定性没有发生变化，于是轨道的混沌震荡也没有发生改变，而当时滞逐渐增大时，系统的混沌特性会发生变化，在τ取某些值时，混沌震荡会演变为一个稳定周期轨道。

It is assumed that the composite has a periodic microst ructure and the contact between fibers in the fiber bundle is smooth.

假设该模型的细观结构呈周期性均匀分布，纤维束内的纤维接触是光滑的。

In order to calculate the equivalent step index of the periodic structure of the cladding holey optical fiber, all-vectorial fundamental space filling mode approach was utilized.

为了计算周期结构包层多孔光纤的等效阶跃折射率，采用了全矢量基本空间充填模式法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。