古斯塔夫登陆时的强度为二级风暴,风速大约每小时175公里,预计新奥尔良将连续数小时受到冲击。
Gustav landed as a secondary storm with a wind speed of about 175 kilometers per hour, and New Orleans is expected to be hit for several hours in a row.
康涅狄格州米德尔敦一家天然气发电厂发生爆炸,形成如同地震一般的冲击波,影响达数英里。
An explosion rocked a natural-gas power plant Sunday in Middletown, Conn., sending earthquake-like shock waves miles away.
古斯塔夫登陆时的强度为二级风暴,风速大约每小时175公里,预计新奥尔良将连续数小时受到冲击。
Gustav came ashore as a Category Two storm, with winds moving at 175 kilometers per hour. It is expected to lash the city for several hours.
石油和天然气钻孔机可以在海平面以下数里之外传送地震冲击波,收集回声,并对该地区是否存在石油做出推理。
The oil and gas driller can send seismic waves miles under the sea floor, gather the echoes, and deduce whether petroleum might exist there.
日渐兴起的石油价格冲击国际股票市场。当伦敦交易者回家时,英国富时100指数下降了73.23点达到5924,道琼斯交易也下降了约93点达到12,119.
Surging oil hit world stock markets, with the FTSE 100 closing down 73.23 points at 5924 and the Dow Jones trading down around 93 points at 12,119 as London traders went home.
日渐兴起的石油价格冲击国际股票市场。当伦敦交易者回家时,英国富时100指数下降了73.23点达到5924,道琼斯交易也下降了约93点达到12,119。
Surging oil hit world stock markets, with the FTSE 100 closing down 73.23 points at 5924 and the dow Jones trading down around 93 points at 12, 119 as London traders went home.
利用垂直截面法测量了08f钢经不同形变氮化复合后冲击断裂表面的分形维数。
Fractal dimension of impact fracture surface of 08f steel was measured by vertical section method.
结果表明,在静态或准静态加载条件下的断裂面分维数近似为一个常数,但在动态(冲击)加载时,分维数随着加载率的增加而明显增加。
The results show that under static or quasi-static loading the fractal dimension DF is nearly a constant, but under dynamic(impact)loading the DF obviously increases with the loading rates.
另外,推测了马赫数4拟似冲击波非对称的原因。
Moreover, the reason that Mach 4 oblique shock wave is asymmetric is conjectured.
计算结果表明,冲击射流所形成的脉动壁压场可用正交分解进行描述,其特征谱函数随阶数的增加而迅速衰减,对谱密度函数进行低阶近似也非常有效。
The results show that the eigen spectral functions declined with the increasing of order rapidly. The reconstruction of spectral density function shows that low order approximation is very efficient.
研究了水斗数对冲击式水轮机性能的影响。
The experimental study on the influence of bucket Numbers on the Pelton turbine's performance was presented.
论文全面分析了有限冲击响应滤波器字长截断和阶数截断误差对接收机性能的影响,为数字接收机中的滤波器字长和阶数选择提供了理论依据。
Effects of digital filter quantization errors on performance of receiver have been analyzed thoroughly, which provide the criterion to determine the word length and order of FIR.
对深南电和其他数家中国企业来说,问题是对冲结构只能部分保护它们免受原油价格大幅波动的冲击。
The problem for Shenzhen Nanshan and several other Chinese companies is that the hedging structures only partly protected them against volatile swings in crude-oil prices.
当横流雷诺数与射流雷诺数之比大于0.5之后,有横流时的冲击射流冷却局部努赛尔数比无横流时有较为显著下降。
When the cross-flow to jet Reyuolds number ratios are greater than 0. 5, the jet impingement Nusselt numbers arc obviously lower than that without cross-flow.
行星轮与内齿圈齿数不为行星轮个数的整数被时,轮齿的啮入、啮出对系统的冲击小,系统的效率高。
If either the number of sun or ring gear is not multiple of planet gear, system will run effectively, with lower impaction of tooth mesh in and out.
行星轮与内齿圈齿数不为行星轮个数的整数被时,轮齿的啮入、啮出对系统的冲击小,系统的效率高。
If either the number of sun or ring gear is not multiple of planet gear, system will run effectively, with lower impaction of tooth mesh in and out.
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