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number of time
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     When the strength obeys Weibull distribution and the stress obeys Gauss distribution,the integration interval of calculation reliability is subdivided to some subdomain. In the subdomain of the integration the numerical integration formula of Gauss Lagendre is applied. The adaptive algorithm is presented in this paper at the request of the calculation reliability accuracy,which can autonomously adjudge the calculation number of time.
     利用8结点Gauss-Lagendre数值积分公式,采用分段积分方法,导出了当强度和应力分别服从威布尔分布和正态分布时计算可靠度的自适应算法.该方法能够根据要求的可靠度精度,自动控制计算次数并能估计计算可靠度的实际误差.
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  “number of time”译为未确定词的双语例句
     RESULTS:(1)The neurological score and the study- remembrance score(N represents number of time when the rat learn standardization ,A/10 represents rate of retention of memory ) after ischmia 3 hours and reperfusion 24h (I 3h / R 24h) was 0, 47.5±7.1, 0.91±0.08 in the sham operation;
     结果:(1)缺血3h再灌注24h后神经功能缺陷计分及Y-电迷宫测试大鼠学习记忆能力(N代表学会标准时的训练次数;A/10代表记忆保持率): Sham组: 0分,N为47.5±7.1 , A/10为0.91±0.08;
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     We give an 0(n~3m~(7/3)+ Qlog Q+Qm) algorithm to construct such a schedule whenever one exists (where Q is the total number of time intervals of availability).
     提出了一个在O(n~3m~7/~3+QlogQ+Qm)时间内可构造一个可行的抢先进度表的方法(Q是允许区间的总数).
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     Analyzing serial number of time,the article researches validity of Chinese monetary policies transmitted to China's capital market in the new period of People's Bank of China indirectly controlling monetary policies and in new phase of regulating China's capital market.
     文章运用时间序列分析的方法,研究在中国人民银行间接调控货币政策的新时期,在中国资本市场规范成长的新阶段,中国货币政策传导到中国资本市场的渠道的有效性。
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     The average value of number of time of the S1 amplitude after exercise with respect to the S1 amplitudes before exercise is 10.57.The results suggest that PCGET has increased S/N ratio; introcardiac noise,noise from transmission of heart/thorax acoustic system,respiratory noise, muscle noise and ambient noise could not interfere in the application of PCGET.
     各受试者运动后S1幅值对运动前S1幅值的倍数的平均值为 10 .57,这表明 ,PCGET提高了信 /噪比 ,心内噪声、心胸系统传播过程中产生的噪声、呼吸噪声、肌肉噪声和环境噪声没有妨碍PCGET的应用。
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     It studied a discrete Lotka-Volterra model with a finite number of time delays.
     研究了一个带有有限多个时滞的Lotka-Volterra离散模型.
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     Time
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  number of time
They are shown to require the least number of processors and memory locations to store checkpoints given a certain number of time steps.
      
a node allocates a number of time slots in each superframe for exclusive use.
      
A technique for reconstructing the transfer function of the channel using the chirp-sounding spectra recorded for a number of time instants is proposed and tested using the fast Fourier transform.
      
This is achieved through parallelization of parallel shooting method in time domain, by breaking the time of flight into number of time zones (divide and conquer).
      
Simulations, to test for the reconstruction of different modes of time elapsed variation of the intervention benefits, are carried out on realistically noisy 'data sets' taken to be available at a limited number of time points.
      
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Seismic data for the period 1446-1969 in the North China seismic active region have been used in this study. We selected 36 earthquakes which occurred at the points of inflection and at the main peaks of the active periods. Hermitian interpolation was made between the energies of two consecutive earthquakes. In this way, a curve of equal sampling intervals showing the variation of the activity of the North China seismic region during the past 500 years was obtained.This curve may be assumed to consist of two...

Seismic data for the period 1446-1969 in the North China seismic active region have been used in this study. We selected 36 earthquakes which occurred at the points of inflection and at the main peaks of the active periods. Hermitian interpolation was made between the energies of two consecutive earthquakes. In this way, a curve of equal sampling intervals showing the variation of the activity of the North China seismic region during the past 500 years was obtained.This curve may be assumed to consist of two parts, namely, the deterministic part and the stochastic part. A periodic model and an auto-regressional model of stationary stochastic process were respectively proposed for carrying out extrapolation and prediction.By posteriori-test analysis, we mean the interceptions of the recent data 15 times, each followed by computing, extrapolating and predicting separately. Again, by summing up the number of time intervals predicted to be earthquake dangerous, a curve of prediction could be obtained.Based on these results of posteriori-test we predicted in April 1974 the appearance during the time interval from 1975 to 1977 a seismic active period in North China, within which the Haicheng earthquake of 1975 and the Tangshan earthquake of 1976 actually occurred. Moreover, the said curve is still significant for predicting future earthquakes in North China. It seems that the seismic active period of North China starting from the Haicheng earthquake would last for a certain length of time, till about 1980, but it would be again active at around the year 2001.

本文资料取自华北地震区1446—1969年的地震记录.选出活动期主峰与拐点地震36次,每两次之间做埃尔米特插值,这样就构造出一条等间隔采样的曲线,它反映了五百年来华北地震活动强弱的变化.设此曲线由两部分组成,确定性部分和随机部分.给出轮回模式与平稳随机过程的自回归模式,分别进行外推预测.文中还做了后验综合分析,将近期资料删截15次分别进行计算、外推、预测.把每个时间段被预测危险的次数相加得到预报曲线.根据这些后验的结果,于1974年4月估计,1975至1977年华北将出现地震活动高潮.在此间发生了1975年2月5日的海城地震与1976年7月28日的唐山地震.该曲线对今后华北地震仍具有预报意义.以海城地震开始的华北地震高潮还要延续一段时间,至1980年后才转入低潮,且到2001年前后将开始重新活动.

This is a brief introduction on the academic activities concerning time and frequency submitted to the National Assembly of the Chinese Astronomical Society, 1982. Tbe development of time service in China during the last three years can be summarized as the following four paris a. Local atomic time systems have been establisbed in two observatories with the ever-improving accuracies. By using the homemade hydrogen maser, the length of a second is kept at the accuracy of 2×10~(-12) or better, and the daily stability...

This is a brief introduction on the academic activities concerning time and frequency submitted to the National Assembly of the Chinese Astronomical Society, 1982. Tbe development of time service in China during the last three years can be summarized as the following four paris a. Local atomic time systems have been establisbed in two observatories with the ever-improving accuracies. By using the homemade hydrogen maser, the length of a second is kept at the accuracy of 2×10~(-12) or better, and the daily stability is better than 3×10~(-13) b. With many satisfactory results, a number of time synchronization experiments were carried out domestically or cooperated with other countries. The time comparison experiment by means of Symphony satellite between China and France, the time synchronization experiments by flyingclocks and TV, as well as by receiving Loran-C signals are some of them. Parkticularly, it achieved very good results that the time delay of ground long waves on the irregular surface has got a better revision via a flying clock. According to the revision, the accuracies of time synchronization can come up to ±0.2μs and ±0.5μs on homogeneous and irregular surface respectively. c. The study and development of many kinds of equipment in the subject of time and frequency have alao got encouraging progress d. The pricision of frequency and time intervals broadcasted by the HF station has been improved and now reaches a high quality, better than 1×10~(-11). The broadcasting of time and frequency with LF(BPL) at fixed time every day has been developed simultaneously and the Pricision is better than 1×10~(-12). All the time differences between BPL and UTC(CSAO) are less than 2μs. Along with the development as stated above we have cooperated with our colleagues in the world. As the participants of CCIR, some academic theses were presented to the symposia during the past three years。 For the purpose of getting academic exchange, a number of foreign experts engaged in this specialality were invited to visit our country. To sum up the time service in China during the last three years, we could say that we have made a large Step. we art looking forward to getting more progress.

本文简要地介绍了中国授时工作三年来的工作情况,文章分四个方面进行了介绍。 1.在几个天文台建立了地方原子时,其精度逐年有所提高,秒长的保持主要是利用国产的氢脉泽,秒长的准确度为2×10~(-12),日稳定度优于3×10~(-13)。 2.时间传递:三年来利用各种手段进行大量的时间传递试验。如利用交响乐卫星进行了中、法比对试验,国内搬运钟试验,国内电视同步比对及Loran-C长波比对等,这些试验均取得良好的结果。尤其是利用长波地波模在复杂地面上的传播时延修正达到较高水平,在平滑地面上同步精度为±0.2μs,复杂地面上为±0.5μs。 3.时频设备的研制:研究制做了一系列时频比对设备,达到较好的水平。 4.长、短波时频发播:提高了短波发播控制精度,建立了BPL长波发播台。每日固定时间发播,发播的控制精度优于1×10~(-12),与UTC之差小于2μs。 5.国际联系:多次参加了CCIR第七组会议并向大会提出多篇文稿,邀请美国USNO搬运钟组来华比对。并多次接待来华访问的时频专家。

Stiffness occurs whenever the associated system matrix A possesses widely separated eigenvalues.In this condition,it is difficult to find a numerical stable algorithem to solve differential equation.So far there has been no approach to solving the stiff equation reasonably. In this article we have supplied a specific algorithem which,doing some squaring operations,can complete a great number of time steps in computation.Thus,this method will allow us to use sufficiently small step sizes so as to guarantee...

Stiffness occurs whenever the associated system matrix A possesses widely separated eigenvalues.In this condition,it is difficult to find a numerical stable algorithem to solve differential equation.So far there has been no approach to solving the stiff equation reasonably. In this article we have supplied a specific algorithem which,doing some squaring operations,can complete a great number of time steps in computation.Thus,this method will allow us to use sufficiently small step sizes so as to guarantee the stability and accuracy.Therefore we can solve the problem of the linear stiff differential equation.

当关联系统矩阵 A 具有非常分散的特征值时,就会出现刚性性质。在这种情况下,要想找一个稳定的数值求解微分方程的方法是非常困难的。迄今尚无一种方法能合理地求解刚性方程。本文提出了一种特殊的方法,即仅对矩阵做一些乘方运算就能完成大量步数的数值计算。此法将能用足够微小的步长去保证计算方法的稳定与精度,因此能够解决线性刚性方程的求解问题。

 
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