Eurocontrol, the Brussels-based agency that coordinates air traffic management across the region, said that 20, 000 flights, out of a regularly scheduled 24, 000, were canceled on Sunday.

欧洲航行安全组织，总部坐落在布鲁塞尔，专门协调欧盟区域内的航空运输，表示有超过2400班次计划内航班在星期日被取消。

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The paper presents a Kalman filter algorithm in the polar coordinates, describes the deduction process, the calculational formulas and target speed calculation method in air to ship attacking.

介绍了一个极坐标下卡尔曼滤波算法，给出了模型的推导过程及卡尔曼滤波的标量计算式，并给出了空舰攻击中目标速度的计算方法。

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It is indicated that the air temperature and ground temperature in the plateau can be expressed as functions of location coordinates and time.

应用曲线拟合方法将所得统计分析系数拟合成时间函数，就可将高原地区的气温和地面温度表示成统一的空间坐标和时间的函数。

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Army Special Forces provided target coordinates to Air Force bombers because they had the capacity to communicate quickly and precisely.

CENTERFORSECURITYPOLICY: Time for the Bush military build-up