A kind of sealing device of discs for valves was introduced, which has two discs to close valves in two stages : fast close and slow close. 介绍一种具有大小两个启闭件并以快慢两阶段方式关闭阀门启闭件的密封装置。
To standard genetic algorithm, facing the defects of premature phenomena and the phenomenon of swing and slow convergence when close to optimal solution, fitness function and genetic operation are improved. 基于标准遗传算法,针对早熟现象以及接近最优解时在最优解附近左右摆动,收敛较慢等缺陷,对适应度函数和遗传操作进行了改进。
But I still slow and careful to close to you, must be because mutual pity. 但我还是缓慢而小心地接近你,一定因为相互怜惜。
Nice and slow. I 'm getting close to the first level. 慢慢来,我快接近第一层了。
In both scenarios, growth in gross domestic product would slow rapidly to an annual rate close to 1 per cent by the end of this year, but the recovery would take longer with interest rates unchanged. 在两种情况下,到今年年底,英国国内生产总值(GDP)年增幅都将快速下降至接近1%的水平,但如果维持利率不变,复苏就会需要更长时间。