Results With the observational time prolonged,the plaque index and gingival index of buccal side decreased at the 1st,3rd, 6th months compared with baseline in group T.

142 Hydroxylapatite - coated dental implants were implanted in 73 patients. Through the observationfrom 18 to 48 months, the cumulative success rate was 92. 3%, the life table survival analyses showedthat success rate came doWn with clinical observational time.

· METHODS: For 37 diagnosed cases (56 eyes) whose clinical medicine observational time were 1 month, 3 months, 6 months and 1 year after treatment respectively, conjunctival impression cells were dynamically examined using acridine orange fluorescent staining.

Results:The induced time,awake time,observational time,dasage of propofol and the decline of MAP in group significantly were less than those in group Ⅱ (all (P<0.01)).

In consideration of the observational error, the truncation error and the requirements of numerical weather prediction, three formulas for determining the distance between two neighboring stations d, the vertical increment Δp and the observational time interval At in optimum sense, have been derived.

But in case of short observational time spans,the normal equations are seriously ill-conditional,which cause float-solution has large deflection compared with accurate solution.

Such variations could be a serious limiting factor over observational time spans many years long.

With a proper choice of the inclination of the two satellites, the periods of all the uncancelled time-dependent perturbations could be made short enough to allow to fit and remove them from the signal over observational time spans of a few years.

The shape of the 4.8 h light curve showed variations on all observational time scales.

Moreover, evaluating the seasonal variation of pH based on this algorithm, we compared the measured pH with the predicted pH at the observational time series stations in subpolar and subtropical regions.

As a sensitive local magnetic probe with a complementary observational time window to other techniques LE-μ+SR offers the unique possibility to gain new insights in these nano-scale objects.

In consideration of the observational error, the truncation error and the requirements of numerical weather prediction, three formulas for determining the distance between two neighboring stations d, the vertical increment Δp and the observational time interval At in optimum sense, have been derived. Since they depend on the shortest wave length taken into account and the ratio of the maximum observational error to the corresponding wave amplitude, the results obtained are quite different for different...

In consideration of the observational error, the truncation error and the requirements of numerical weather prediction, three formulas for determining the distance between two neighboring stations d, the vertical increment Δp and the observational time interval At in optimum sense, have been derived. Since they depend on the shortest wave length taken into account and the ratio of the maximum observational error to the corresponding wave amplitude, the results obtained are quite different for different scale systems. For the filtered model, the values of d, of Δp and of Δt, in general, come near those required in the MANUAL ON THE GLOBAL OBSERVING SYSTEM published in 1980 by WMO. However, the values of Δt required by the model are much greater than those required by the primitive equation model.Therefore, it is improper to study the fast moving processes of the atmospheric motion on the basis of the current conventional observations only. It is necessary to establish an optimum composite system which includes the surface-based and the space-based observational system.

Arrangement of Songshan electromagnetic station. instrumental status and working situation are briefly introduced in this paper. The authors Compile a few softwares of data treatment and analysis, preliminary analyse observational data from Oct. 1994. to Oct 1995, discuss the observational reflecting earthquake abilily of the earth's electric field about Yongdeng earthquake with Ms5.8 on July, 22, 1995 in the station. The results show that the data are steady, their qualities are good. But because the observational...

Arrangement of Songshan electromagnetic station. instrumental status and working situation are briefly introduced in this paper. The authors Compile a few softwares of data treatment and analysis, preliminary analyse observational data from Oct. 1994. to Oct 1995, discuss the observational reflecting earthquake abilily of the earth's electric field about Yongdeng earthquake with Ms5.8 on July, 22, 1995 in the station. The results show that the data are steady, their qualities are good. But because the observational time is short. the authors can't do some numerical analysis without any interference. and they can't discriminate obvious anomalies.

In this paper a new nethod is introduced.By it,the records of the required field stars can be found out quickly from PPM that has been stored in a computer.The mean positions and standard coordinates of these stars at observational time are also obtained.At the same time,the star chart of the field is printed out so that user can confirm the stars on a plate.The practical reference system of star can be used conveniently to astrometry with photograph or CCD,etc.Especially,It can rapid by provide...

In this paper a new nethod is introduced.By it,the records of the required field stars can be found out quickly from PPM that has been stored in a computer.The mean positions and standard coordinates of these stars at observational time are also obtained.At the same time,the star chart of the field is printed out so that user can confirm the stars on a plate.The practical reference system of star can be used conveniently to astrometry with photograph or CCD,etc.Especially,It can rapid by provide a precise reference coordinate system for the astronomical orientation of various space vehicles at real time.