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The electroweak corrections at one-loop level to the process [ital H][r arrow][ital t[bar t]] are calculated, incorporating the top mass value announced recently by [ital CDF]. For [ital M][sub [ital H]][lt]1 TeV where a perturbative calculation is valid, the corrections themselves would gain a few to 20% increment in the decay width as the Higgs-boson mass [ital M][sub [ital H]] is increasing within the region, but they are in opposite direction to the [ital QCD] ones. If the electroweak and [ital QCD] corrections are considered together, the resultant decay width of the mode yields a reduction about a few percent of the tree level one.

Cognitive Radio requires improving spectrum utilization, and focusing on complexity of the sub carrier power allocation algorithm in OFDM system, A power allocation method which plots the entire channel into lots sub carriers segments is proposed. It gets the maximum communication throughput by auto-adapted modulation. After improved the method, the system performance is also improved. The result showed that method can improve the spectrum efficiency.

The electroweak corrections at one-loop level to the process $H\rightarrow t{\bar t}$ are calculated, especially the fresh top mass value announced recently by CDF is concerned. For $M_H < 1. TeV$ where a perturbative calculation is valid, the corrections themselves would gain a few to 20 percent increment in the decay width as the Higgs mass $M_H$ is increasing within the region, but they are in opposite direction to the QCD ones. If the electroweak and QCD corrections are concerned in the meantime, the resultant decay width of the mode yields a reduction about a few percent of the tree level one., 18, a new version#