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.

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;

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).

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.

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.

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.

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.

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.

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。