周期

E. staining and other techniques were used to elucidate the pattern of follicular development, atresia, changes in follicle number on the ovarian surface, proportions of apoptotic granulosa cells in follicles of different sizes and morphological changes of atretic follicles, as well as changes in serum estradiel and progesterone levels at different stages of the porcine estrous cycle.

为探讨猪发情周期不同时期卵泡发育和闭锁的规律及机理，本实验通过TUNEL原位标记、H.E。染色以及放射免疫测定等手段研究了猪发情周期不同阶段卵巢表面各类卵泡数量的变化、各类卵泡中颗粒细胞的凋亡比例、闭锁卵泡的形态变化以及发情周期各阶段血清孕酮及雌二醇水平的变化等问题。

The results show that,the control of delaying period-doubling bifurcations and unstable periodic orbits in a chaotic attracter of the AOB system is effectively realized,and other stable periodic orbits 2np、3mp and 2np×3mp are obtained by adjusting the control parameters.

仿真模拟显示，通过选择恰当的控制参数，有效地实现了声光双稳系统中倍周期分岔的延迟控制和混沌吸引子中原不稳定周期轨道的稳定控制，同时，还可以将系统控制在2np、3mp 和2np×3mp这样其它任意所需的周期轨道上。

The time series contains the obvious 2-7 years cycle in consistence with the ENSO cycle as well as the decadal cycle.

全球陆地降水序列中有明显与2-7年ENSO周期相吻合的变化周期，也有年代际的周期变化。

Being of the open-loop control technique,the PWCT is fittable forsuppressing chaos in the ODS with wide period windows when supportedwith the quick algorithm of scanning and localizing the periodwindows,which has been developed for the easy application of thePWCT.The result of the computer simulation of controlling theopticalsecond-harmonic system with the PWCT is presented in the text forattestation.

周期窗口控制技术为开环控制技术，具有快速、简便、易行的特点，它主要适用于在周期窗口较宽的情形下对光动力学系统进行快速混沌压制控制，为便于其应用文中同时开发了相应的周期窗口快速搜索及定位技术，并给出了利用二者控制光学二次谐波系统的计算机仿真结果。

The characteristics of the reproductive cycle in this specieswas the same as that of other typical Gastropoda animals.

瘤背石磺的生殖周期具有典型的腹足类动物的特征，性腺发育周期可以分为：休止期、增殖期、生长期、成熟期、排放期5个时期，生殖周期为1年，成熟和排放期在6月上旬到9月上旬，繁殖高峰期在7月上旬至8月上旬，10月后进入休止期。

The pattern of diurnal cycle also can be classified into three strategies:(1) Planulation of S. hystrix and S. pistillata revealed a well-defined diurnal pattern with most planulae being released close to sunrise.

在日夜周期方面也可分成三种生殖策略：(1)尖枝列孔珊瑚与萼柱珊瑚有明显的日夜周期，释放幼生周期的同步性高，而且释放时间集中在天亮前后。

The pattern of lunar cycle can be classified into three strategies:(1) Planulation of S. hystrix and P. damicornis showed clear lunar periodicity and the peak of larval release shifted with different months. The peak of planulation occurred around the full moon in winter then shifted gradually to the first quarter moon phase in summer. The phase shift of larval release may be related to the seasonal variation of seawater temperature and the sudden temperature drops caused by upwelling.(2) Planulation of S. pistillata showed clear lunar periodicity and the peak of larval release occurred around the full moon.

在月周期方面可分成三种生殖策略：(1)尖枝列孔珊瑚与细枝鹿角珊瑚释放幼生不但有明显的月周期，而且释放幼生的高峰会随著月份而移动，由冬季至夏季期间，高峰从满月前后转变至上弦月前后；再由夏季至冬季期间，高峰从上弦月前后转变至满月前后，而此变动形成一个完整的年周期，原因可能与海水温度影响配子发育和胚胎速度与夏季期间涌升流所造成的降温有关。

Additionally, we analyzed the thermal-decay rules of LPGs. We use temperature-compensating package to reduce the sensitivity of temperature of LPGs. At the end of this paper, we summarized the key technologies required during practical application of LPGs, During this paper, we obtained some inventional results as follow: 1. We deduced waveguide modes of single and many mode fibers by use of Maxwell equation.

论文工作期间，主要取得了以下几方面的成果：一、我们利用Maxwell方程，推导了单模和多模光纤的导波模式，同时利用耦合模原理，简要推导了反射式光纤光栅的模式场分布及相应的模式特征方程；采用弱导光纤近似理论，严格推导了透射式长周期光纤光栅的模式场分布，得到了光栅周期与光波长间的对应关系，这是分析长周期光纤光栅光谱特性的有力工具。

In the height of system theory, the paper presents enterprise life system structure, identification system, motivity system and immunity system, forms an integrity and preciseness structure. Around the topic of enterprise lifecycle system, the view of enterprise lifecycle system management combines biology character, economy character and system character of enterprise. It has a largish different to current research results. These are just the innovative viewpoints of the paper.

论文站在系统论的高度，提出企业生命周期系统结构、识别系统、动力系统和免疫系统，并围绕着企业生命周期的核心概念层层展开，前后衔接，形成完整严谨的体系，综合了企业的生命特性、经济特性和系统特性，相对当前有关企业生命周期的研究成果具有很大不同和进步，这也正是其创新性所在。

Analysis the operating principle of highest power factor convertor for monocyclic control, and the design process and parameters of each part of circuit are given, and then research the convertor using OrCAD.

分析单周期控制的高功率因数变流器的工作原理，给出基于单周期控制的航空高功率因数变流器主电路和控制电路各组成部分的设计及参数，并应用OrCAD对基于单周期控制的高功率因数变流器进行仿真研究。

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