Интернет и автоматизация проектирования
Psychological predictors of academic achievements in university students were studied (N = 176). The aim of the study was to investigate how the Big Five personality traits contributed to different academic achievements. The Unified State Examination (USE) scores were used for evaluation of academic success prior to university admission and grade point average was used as a measure of current academic performance. Introversion, Agreeableness, Neuroticism and Openness were shown to be important predictors of academic achievements in Russian university students. These results are only partially supported by the results of similar studies conducted in Western Europe and North America. Possible reasons of the above discrepancies are discussed. It is concluded that these discrepancies are due to country-specific differences in educational environment and requirements to student personality traits.
The suppression of the nonlinear distortions in amplifier using the effect of the envelope signal of the amplified HF oscillations on the amplifier parameters is analyzed. A slow (on the time scale of the HF oscillations) variation in the parameters gives rise to additional frequency components of oscillations that compensate for the nonlinear distortions of the original signal. Several variants to employ the compensating signal using the feedback circuits in the transistor amplifiers and variations in the electron-beam current in TWT in the absence of such circuits are considered. The suppression of the nonlinear intermodulation distortions (IMDs) of the test two_frequency signal is studied for the above variants and the suppression of the third_order IMD by 6–19 dB corresponds to the known experimental data on the microwave transistor amplifier. The generalization of the quasistationary method for the analysis of the nonlinear transformation of signals allows the analysis of the amplification and suppression of IMD for more complicated multifrequency signals that are used in radio systems.
Let G be a semisimple algebraic group whose decomposition into the product of simple components does not contain simple groups of type A, and P⊆G be a parabolic subgroup. Extending the results of Popov , we enumerate all triples (G, P, n) such that (a) there exists an open G-orbit on the multiple flag variety G/P × G/P × . . . × G/P (n factors), (b) the number of G-orbits on the multiple flag variety is finite.
I give the explicit formula for the (set-theoretical) system of Resultants of m+1 homogeneous polynomials in n+1 variables