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With these years rapid development, Chinese tire industry has become one of the anti-dumping most frequently industry. This paper selected six indices and constructed tire industry international competitiveness evaluation system. Based on Large amount of data gathered, we analyzed the situation of eight major tire produce countries through factor analysis method, particular evaluated Chinese tire...
This paper reviews the studies and research on climate change impacts on the forest ecosystems in Northeast China. The results show that in the context of global and regional warming, the growing season of coniferous forests has been increasing at an average rate of 3.9 d per decade. Regional warming favors the growth of temperate broad-leaved forests and has a detrimental effect on the growth of...
Double Q-switched Laser is realized using LD End-pumped Nd3+:YAG crystal, AO modulator and Cr4+:YAG saturable absorber. The repetition frequency, average output power and pulse width of the laser pulses were investigated experimentally. When the double Q-switched laser works at a stable repetition frequency, in comparison with the single Q-switched case, it is found that the pumped threshold electric...
This paper first quantify regulatory degree and regulatory effect of telecommunication industry in china, then establish multiple double logarithmic linear regression equation using time-series data between the year 1992 and 2009 and variables of regulatory degree and regulatory effect. The model is modified by the weighted least squares estimation model after testing its heteroskedasticity and other...
A large-signal circuit model of QCL is described, which is based on a set of rate equations by analyzing the unipolar behavior of electrons in quantum well , and the frequency response characteristic of QCL is got by the circuit simulation of PSPICE Program. Consequently some factors that can affect the modulation characteristic of QCL have been analyzed .
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