查询词典 periodicity of function

The analyzing aboved is made from earthquake's space distributing, periodicity, migration phenomenon, repetition, strength, frequency, b value etc., according to data of earthquake station net in Shaanxi Province and microseisms station net watching results in Xi'an area. 3 group faults which are NEE, NW and EW direction control earthquake activities in Guanzhong area. Epicenter depth mostly is 5-25km and in shallow-focus earthquake. Earthquake in east area of Guanzhong was stronger and weaker in the West in history. Fen-Wei earthquake belt showed more activity. Microseisms and small seisms is main movement in recent earthquake, it has 8-10years' period of movement and show the trend that they are strong in the West but weaker in the East. And frequency and biggest magnitude of earthquake is supplement each other. In next years earthquake frequency will lessen but strength enhance, about M4. It presumes there is earthquake climax period in Guanzhong area in 2040 and M5-6 earthquake is happened at that time.

本文在对关中地区区域构造及重磁异常特征的分析基础上，根据陕西省地震台网监测资料及西安地区微地震台网监测成果，从地震的空间分布特征、周期性、迁移现象、重复性、强度、频度、b值分析等方面，对区域地震活动特征、关中地区地震活动规律进行了分析研究，关中地区地震活动主要受北东—北东东向、北西向、东西向三组方向的断裂控制，震源深度多为5—25公里，均属浅源地震，历史地震表现为东强西弱，东部的汾渭地震带表现出较强的地震活动性，近代地震活动主要以微震或小震为主，存在着8—10年的活动周期，近期表现出西强东弱的趋势，地震的频度与地震最大震级呈互补关系，未来的几年间，地震频度会有所减少，强度会增大，将有可能发生4级左右的地震，推测在2040年左右，关中地区将进入地震高潮期，届时将可能有5—6级左右的地震发生。

This thesis is to introduce time series analysis to forecast the delivery time of the pregnant women for the decision support system of the Hospital Information System. The pregnant woman is special forecast object, because it has so much obvious biologic periodicity and some uncertain factor.

本文在现代医院信息系统的决策支持层中引入时间序列分析方法对孕妇分娩时间进行预测，但是孕妇这一特殊的预测对象自身有着非常明显的生物周期性而且具有不确定性。

Finally, the empirical result of the single systemic factor model showed that the common factor Z had periodicity existed; that is to say, if Z was negative in average within the first quarter, then that meant the overall economic situation in that quarter was not good, and affected every enterprises credit ratings declining.

最后，单一因子模型的实证发现，共同因子存在一个周期性，即每年的第一季Z均为负，表示该季总体经济状况不好，使得平均每一家企业的信用评等均下降，每年的二四季Z均为正，表示这三季的总体经济状况良好，使得平均每一家企业的信用评等提升。

The blades are modeled as pendulums with the aim of analyzing the inertia effects of the blade and the periodicity of the system.

为了分析叶片的惯性影响和系统的时变性，将叶片模化为单摆模型。

The Sr isotopic growth periodicity is relates to the annual variation of Sr isotope in the surface layer of sea-water.

锶同位素的周期性主要是由于附近大陆年周期性降雨量的变化所引起的，它不受生物生长作用的影响。

Of, the structural periodicity (the number of base pairs per turn of the double helix).

酶切周期与结构周期相符，酶切周期确定是结构周期的一种反映。

Based on the study of chronology and geochemistry of Cd in sediments of the Dongting lake area, we have established an ARIMA model of Cd and Cd/Ca in Quaternary and Holocene period respectively, and discussed Cd evolutionary regularity according to the fitted value and predicted value of the model The results revealed that the Cd evolution has remarkable periodicity of ecogeochemistry cycles, and is correlated with the climate change of alternative cold and warm Cd/Ca is changed with climate, from which the evolutionary history of regional ecogeochemistry can be inferred The changes of Cd and Cd/Ca are basically simultaneous, which showed that the change of Cd is mainly a natural evolution Cd in sediments will rise in the next 30 years and then tend to decrease From the regularity of ecogeochemistry indexes and global environment variation, it is concluded that the natural environment is the dominant factor affecting the Cd deposition

在对洞庭湖区沉积物钻探取样的年代学和地球化学研究基础上，分别建立第四纪和全新世时期Cd和Cd/Ca的时间序列演化ARIMA模型，并据模型的拟合值及未来预测值对区域地球化学环境中Cd的演化规律进行了探讨，结果显示区内Cd的演化有较显著的周期性--环境地球化学旋回，与气候多次冷暖的交替有关；沉积物Cd/Ca受气候环境等控制，分析该比值的变化规律可推测区域环境地球化学的演变历史；Cd和Cd/Ca两者的变化基本同步，说明该区Cd的演化主要为自然演化；未来30年内沉积层的Cd含量仍有逐渐增高的趋势，之后转为降低。从本区环境地球化学指标的时间变化规律及其与全球环境变化的相关联中说明自然条件是区域镉等元素沉积的主控因素。

Normal speech, speech with pitch dithering and speech background noise have been used to test the performance of the optimized algorithm, Speech signal after processed by both proposed algorithms presented obvious periodicity in time domain.

我们设计了普通语音、基音有抖动的语音和带有噪声干扰的语音来检验优化算法的性能。

As the results suggest that, during the period of 1800～2005, the 82-year and 48-year quasi-periodic components are available for the secular variation of dipole magnetic field, which are not directly related to the periodicity of the length-of-day variation.

结果表明，1800～2005年期间，偶极子磁场长期变化有82年和48年准周期分量，它们与日长变化的周期没有直接关系。

The characteristics of different implementation of the fiber-optic pulse replicators based on different techniques are compared according to the different performance requirements of insertion loss, periodicity and power stability of the output pulses in various applications.

针对常用的多路高速光脉冲复制系统可能的实现形式进行了研究，根据各种应用中所需的插入损耗、输出脉冲周期性与功率稳定性等性能要求，对多种光纤光脉冲复制结构的特点进行了分析比较。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。