In order to probe into the nature how the issue consciousness functions in the process of the teachers' reflection, the study adopted the qualitative research and chose the three teachers in the same class as the objects of the study.

Grouping the students of about the same athletic capability into the same class is beneficial to the teachers to teach students in accordance with their aptitude.

Methods Subjects were selected by cluster sampling on September 2003 from one high school in Hefei area, according to standard of height-weight for screeing the obesities, and matching natural weight (1∶1) from the same class(by age, sex, economical status of familiy and singleton etc).

Here we present the quantified description of the safety decision-making scheduling algorithm. In order to speed up scheuling process, when we input the course tuples, we put the course tuples with the same teacher and the same class together.

For example, M,N∈R~(n×n) are the same class of F class generalized M- matrices, under the generalized FAN product, M*N is still the class of F class generalized M- matrices.

In the same target regions and the same class target regions, homogeneity and difference exist at the same time in the details of texture and texture distribution.

We prove that all function of the class being considered can be approximated by a Schwarz-Christoffel integral of a special form belonging to the same class.

The problem of parametric synthesis of robustly stable control systems is solved for the same class of objects.

Many practical detectors belong in the same class of structures with the LO detector.

Coptisine was less toxic than chelerythrine and sanguinarine, and affected the formation the same class of comets in higher concentration.

Three groups of school children were also investigated: 98 school failures, 98 unselected students in the same class, and all students (123) in a special school for slow learners.

After a station adjustment according to the method of complete set of directions, a set of independent directions ought to be obtained. But because of lateral refraction and other kinds of systematic errors, directions in a station are really correlated. Using statistical theory and according to the charactoristics of error sources, we have obtained that the correlation coefficient between two directions is ρ=cos(i, j)/(1+K), The rms of an angle is 0.″55(1-(1/(1+K))cosα/(1-(1/2(1+K))~(1/2), here α is the value...

After a station adjustment according to the method of complete set of directions, a set of independent directions ought to be obtained. But because of lateral refraction and other kinds of systematic errors, directions in a station are really correlated. Using statistical theory and according to the charactoristics of error sources, we have obtained that the correlation coefficient between two directions is ρ=cos(i, j)/(1+K), The rms of an angle is 0.″55(1-(1/(1+K))cosα/(1-(1/2(1+K))~(1/2), here α is the value of the angle, and K is the ratio of random error and systimatic error. In China the average value of K is about 0.9. That is, the rms of an angle is dependent upon the value of the angle itself, larger angle having larger rms. In a traverse line, the angles all approximate to 180°, so their rms must be larger than those of a triangulation of the same class. Because of this kind of systematic error, the accuracy of the classical optical observation of traverse angles can hardly be improved. Lastly a model of correlated weight matrix is given, when we do the adjustment of an astro-geodetic network, we may take either angles or directions as independent elements, but they both have some degrees of approximation.

In paper[2], the concentrated distribtion problem of the limit cycles for the second class of the quadratic system under the condition δ=0 has been solved. In this paper, the solution of the concentrated distribution problem of the limit cycles for the same class of the quadratic system under the condition δ?0 is presented. Therefore this problem is completely solved.

In this paper, based on the principle of "normalization" of the different probability densities which the individual samples in a sample sequence have, we discuss the detection performance of robust detector in the situations where the noise samples of the discrete input sequence are assumed to be independent mutually, but taken from different distribution functions (of course, the densities beloning to the same class). It is emphasized that in the receiver constructed in terms of robust detection theory,...

In this paper, based on the principle of "normalization" of the different probability densities which the individual samples in a sample sequence have, we discuss the detection performance of robust detector in the situations where the noise samples of the discrete input sequence are assumed to be independent mutually, but taken from different distribution functions (of course, the densities beloning to the same class). It is emphasized that in the receiver constructed in terms of robust detection theory, the optimum nonlinearity (or the local optimum one) is already optimal, and it is also shown that robust detector can maintain its robustness for the nonstationary input sequence. So it is completely not necessary to insert other nonlinear circuits (links) into the receiver to normalize the noise samples taken from different distribution functions. Otherwise, it will cause the amount of equipment to be increased and, what is more important, harm the receiver's performance. Among various schemes of detection, such as parametric, nonparametric, and other detection, robust detection seems to have been unique to possess such superior performance so far. In J.he paper, the results of computer simulation are also presented.