周期带

In Part 3 we study the mutualism system with several delaysSufficient conditions are obtained for the existence of positive periodic solutions of the system by using the theory of Mawhin coincidence degree .

第三部分考虑了两种群带多时滞的互惠系统我们利用Mawhin重合度理论，得到了系统正周期解的存在性的充分条件，推广了文[28，29]的结果，并且删去[30]的某些条件。

It is convenient for us to get properties of photonic crystal without large numerical calculation.

于是，我们认为光子禁带的形成与单个周期的特性有着直接的关系。

The effects of the position and the optical thickness of the defect layer on the defect modes was analyzed.

结果表明，在准周期结构光子晶体引入缺陷，光子晶体禁带中也产生了缺陷模；随着掺杂缺陷层位置和光学厚度的变化，缺陷模的位置和共振透射峰也随之变化。

Results: The proliferation of Kasumi-l cell was obviously inhibited by VPA on dose- and time-dependent manner. The IC50 was 2.33 mmol/L treated with VPA for 72 h. Incubation with VPA, the cell ratio at G0/C1 phase increased. VPA induced myeloid cell differentiation antigen CD11b to increase with a time-and dose-dependent way and caused apoptosis. Wright's staining and light microscope were used to show the morphology of partial differentiation and obvious apoptosis with 3 mmol/L VPA for 72 hours. The typical DNA ladder of apoptosis characteristic was observed with DNA gel electrophoresis.

结果：VPA能显著抑制Kasumi-1细胞的增殖，且呈剂量和时间依赖性，VPA处理Kasumi-1细胞72h时的半数抑制浓度(IC50)为2.33 mmol/L；VPA处理后，细胞周期检测G0/G1期细胞比例逐渐增高；VPA能诱导髓系分化抗原CD11b表达水平的阳性率升高，呈时间及剂量依赖性；VPA能诱导Kasumi-1细胞凋亡，Kasumi-l细胞经VPA3 mmol/L处理72h后，出现典型的凋亡细胞所具有的梯形DNA条带。

This can be consider as the problem of periodic boundary.

它可以看成是带周期边值条件的解。

The system of roll mill press down is controlled to compensate the thickness variation of the hot strip mill so as to improve the hot-rolled strip thickness accuracy .

从各种随机噪声的轧制力信号这一复杂高频干扰周期波中分离出偏心信号，控制轧机在压下系统实现对偏心的补偿，以提高热轧带钢的厚度精度。

It is worth noting that Saros 136 is one of the most enjoyable eclipse families in this era; it is famous for producing very long total eclipses which are visible to many people as a result of its proximity to the equator.

值得留意沙罗周期 136 於近代制造了不少叹为惊人的日食---它们都是以全食时间长而全食带经过人口稠密的地区而见称。

In order to enhance the slotter organization the working efficiency,often uses swings the guide rod organization form, according tooperation requirements definite travelling schedule speed changecoefficient k or extremely position included angle with thisorganization various sizes related, in order to enhance the slottermain body organization design the speed and the design quality,reduces the design cycle, enhances the product competitive ability,brings the slotter main body organization size the design to besupposed to use the most advanced design method.

为了提高插床机构的工作效率，常采用摆动导杆机构的形式，根据使用要求确定的行程速度变化系数k或极位夹角与该机构的各尺寸有关，为了提高插床主体机构设计的速度和设计质量，减少设计周期，提高产品竞争力，带插床主体机构尺寸的设计应该采用最先进的设计方法。

When the belt is turning "fast," it means that lots of magnetic fields are being swept up, and that a future sunspot cycle is going to be intense.

当带正在转向"快"，这意味着大量的磁场正在扫地，而且未来的太阳黑子周期将是激烈的。

In Chapter 2,we study the existence and multiplicity of periodic solutions forthe suspension bridge equation with damping.

第二章，我们研究带阻尼吊桥方程周期解的存在性和多重性。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失