时段

The order and time delay of the dynamic model are assumed to be unknown a priori. A time-weighted digital filter is employed to group of linear algebraic equations. The moving horizon least-squares algorithm is then developed to estimate the model parameters in a recursive fashion.

该法应用一时间加权离散滤波器将特定时段内取样的输出入讯号转换成一实数，然后利用不同时段的量测讯号以移动区间递回最小平方演算法来估测模型参数。

objective to examine the length of time between complete bilateral ureteral obstruction and the occurrence of severe azotemia and to investigate the relationship between removal of obstruction time and renal function recovery.

目的 探讨家兔在双侧输尿管完全梗阻至重度氮质血症发生时段及解除梗阻时段和肾功能恢复的关系。

According to the burthen of the requirement forecasting at that time, design out each machine of segments' project which lift a hand.

根据下一时段预报的负荷需求，合理的设计出了下一时段各机组出力的分配预案，并得到了最优的机组出力分配方案。

The optimal inventory and capacity joint decisions for a continuous time homogeneous inventory system with finite and infinite horizons are discussed.

在此基础上，分别求解了具有容量约束的有限时段和无限时段连续时间问题的最优存储策略。

Up to half get carsick at some time, and the condition peaks between ages 2 and 12, says the federal Centers for Disease Control and Preention.

据联邦疾病预防与控制中心称，一半以上的儿童在某个时段，尤其在2到12岁之间的某个时段，容易晕车。

In this period of time, the business that office working personnel was far from busy working place to bring and blatant, was far from working environment, was far from unit and organization supervise, freedom is spent increased, when the service personnel that this kind of comfortable environment is business a day originally loosens accomplishment, but if cadre of Party member of a mechanism is lacked,control capacity oneself, this period of time is the most critical period of time undoubtedly, it may be apolaustic heaven, enter the cradle of jail.

在这个时段，机关工作人员远离了繁忙的工作所带来的忙碌和喧嚣，远离了工作环境，远离了单位和组织的监督，自由度增大了，这种宽松的环境本是忙碌一天的公职人员放松修养的时候，但假如一个机关党员干部缺乏自律和自控能力，这个时段无疑是最危险的时段，它可能是放纵的天堂，步入囹圄的摇篮。

The results show that the female adults need a relatively high light intensity to elicit their phototactic response in the morning, but require a lower light intensity for their response at noon and in the afternoon, indicating that the female adults are less active in the morning but much more active around noon and in afternoon.

结果发现，早晨时段雌虫对光的激较敏感，在中午及下午时段较为敏感；雄虫则会因同时段而产生对光激敏感差性。

The analyses of social and economic development indicate that, up to 1998, the total population in Yijinholo County is 143, 949 persons, the population density is 24 persons per square kilometer, large population number results in land exploitation for food and overgrazing in rangeland. The change in temporal and spatial pattern of landuse from 1977 to 1998 demonstrates that mobile sand dunes was replaced by rangeland and woodland and partial shrubland in the middle of study area changed into rangeland and farmland from 1977 to 1987, while mobile sand dunes and rangeland transformed into shrubland and farmland in a small parts from 1987 to 1998, the above-mentioned change is proved by the change of fractal dimension index and fragmentation index at landscape and its element levels.

对近50年来伊旗社会经济发展的分析结果表明，虽然人口增长率基本上呈下降趋势，但由于人口基数较大，截至1998年底，伊金霍洛旗的人口总数达143949人，人口密度为24人／平方公里，较高的人口密度带来了更多的生存需求，使得大量的草牧场被开垦，而剩余的则严重超载。1977-1998年间伊土地利用结构总体格局变化的分析结果表明，1977-1987时段内主要是流动沙地为草牧场和乔木林地所取代，伴随着中部的部分灌木林地转换为草牧场和农地：而1987-1998时段内主要是草牧场和流沙地为灌木林地和农地特别是灌木林地所取代，而景观及各景观要素的分维度指数和破碎度指数的变化也充分证实了这一结论，虽然在前10年（1977-1987年）中大面积的灌木林被砍伐，但土地利用格局的整体变化间接地反映出该时段内荒漠化的状况正在发生逆转。

Mid-thoracic anesthesia or associated with general anesthesia can influence cardiac autonomic nerve tension,with principal manifes tation of decrease reflecting cardiac sympathetic nerve LF value.

结果：E组病人硬膜外麻醉后LF、HF、LF+HF值均较基础值下降P 1后均较T0有所下降，以T3下降明显(P1后均较T0明显下降P1后各时段值均较T0值下降，以T2后明显(P1后各时段值均比A组相同时段值低P结论：中胸段硬膜外麻醉或复合全身麻醉均可影响心脏自主神经的张力，并且主要表现在反映心脏交感神经的LF值降低。

Results show that the development process of model of twenty-five simulation rainfalls is divided into early phase,a...

研究结果表明：依据次降雨相对侵蚀模数REM将历经25场模拟降雨的小流域模型发育过程划分为初期时段、活跃时段和稳定时段。

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