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Finally, applications of the anomalous propagation of microwave in tropospheric ducts are discussed: in connection with concrete radar parameters, effects of ducts on radar range and detection performance are discussed, the results obtained are of great value for the overall design of radar systems; by use of the interference standards of ITU-R, the co-ordination area of satellite earth-station under tropospheric ducts environment is studied ; by explaining the relationship between evaporation duct and advection fog, a new way to forecast sea advection fog from evaporation duct is provided.

最后讨论了对流层大气波导环境下电波异常传播特性的应用:结合具体的雷达系统参数,模拟计算了大气波导对雷达作用距离及发现概率的影响,对雷达系统的总体设计具有重要的参考价值;对表面大气波导环境下的卫星地球站通信协调区域进行了确定,从理论上很好地给出了协调距离量级的概念,为卫星地球站与地面微波站之间的协调提供了依据和参考;分析了利用海面蒸发波导来快速预测平流海雾的新方法,完善了平流海雾的预报方法,对海上安全作业和生产具有重要的意义。

This paper describes the basic principle of velocity pursuit guidance law and body pursuit guidance law of trajectory correction projectiles , researches the terminal correction trajectory and miss distance under pursuit guidance laws by 6—DOF trajectory simulation program, researches the orbit of laser detector ray axis and ground projection area of laser detector spatial viewpoint.

文中对速度追踪制导律和弹体追踪制导律的工作原理进行了研究,利用六自由度弹道仿真程序对弹道修正弹两种追踪方式下的末段修正弹道和脱靶量进行了对比计算,研究了两种追踪方式下激光探测器光轴的轨迹及激光探测器空间视场在地面投影区域的变化;弹体追踪方式命中精度虽然较低,但由于工程实现简单、成本低,仍有其工程使用价值。

With the engineering data , the strut frame made of composed soil nails is analyzed with the program ababqus , and the effects of the distortion characters , the property of the deposition of the ground , the mechanical property of the soil nails , the variation of the length and the separation of the soil nails , and the diametric of the mixing piles on the strut frame made of composed soil nails , and the distortion property of the strut frame made of composed soil nails under different ground conditions

在总结前人的研究成果下,针对复合土钉墙构造的特点,建立了模拟复合土钉墙受力变形的计算模型,并结合工程实测资料,运用大型通用有限元程序ababqus对复合土钉墙进行了有限元分析,详细讨论了复合土钉支护结构开挖过程中的变形特性、地面沉降性状、土钉受力性状;土钉长度变化、土钉间距变化、搅拌桩桩径变化对复合土钉支护结构的影响;复合土钉支护结构在不同地基条件下的变形特性。

The insurmountable difficulties of traditional control strategy in isolating vertical vibration and controlling micro-oscillation may be overcome by employing magnetic levitation technique.As a fundamental research of this technology,the governing equitation of rigid uniformity magnetic suspension pole is derived.

采用磁悬浮技术可以解决传统控制方法在竖向隔震、微振控制等方面所面临的难题,作为这项技术应用基础研究,本文建立了磁悬浮均匀等直刚杆的运动方程,讨论了方程的稳定性,给出了随机地面扰动输入下求解非线性振动解的Runge-Kutta格式,并对悬浮刚杆在任意输入下的响应进行了分析。

IMU signal which is in ground coordinate system transforms to output in missile coordinate system through transformation matrix, and considering the constant error of inertial component, white noise, and random error, the IMU signal in missile can be simulated.

IMU在地面系下的投影,通过转换矩阵转换为弹体系下的输出,再考虑到惯性器件常值误差﹑白噪声与随机误差的影响,即可模拟IMU在弹体内的输出。

For the angle from physics:" Fall wooden " because got,the " below " is gravitational action, and this kind of motion of the " below " is it is with the ground consult of content,"Billow of endless the Yangtse River comes " is announcing of a kind of energy change a relationship, namely the kinetic energy of the " of billow of " of translate into of gravitational potential energy of water.

从物理学的角度来说:"落木"之所以"下"是由于受到了重力的功能,而且"下"的这种运动是以地面为参照物的,"不尽长江滚滚来"则揭示着一种能量的转化关系,即水的重力势能转化为"滚滚"的动能。

Integrate the load transfer principle and shearing displacement method to set up the load transfer equation between the pile of soil, using the discrete and fitting methods to solve the equation so as to educe the pile displacement of arbitrary section as well as the analytical solution. Comparing the results with the soil settlement solved by the Mair equation, the relative displacement can be gained.

1结合荷载传递原理和剪切位移法的思想建立隧道开挖作用下的桩土荷载传递方程,采用离散和拟合两种方法来对该一元二次非齐次微分方程进行求解,可分别得到桩身任意截面处的桩体位移以及桩身位移的解析解,并与基于Mair公式求得的地面下任意深度处的土体沉降进行比较,即可求出桩与桩侧土之间的相对位移。

We shall fight him by land, we shall fight him by sea, we shall fight him in the air, until, with God's help, we have rid the earth of his shadow and liberated its peoples from his yoke .

我们将对他实施地面打击,我们将对他实施海上打击,我们将对他实施空中打击,直到在主的帮助下,将他的魔影从地球上消除,将纳粹统治下的人民从他所设的枷锁中解放出来。

The massive nanometer pigeons fall unceasingly from the sky; these falling nanometer pigeon body already have no support from the black mist, after they drop down and smash in the ground, they can not have the reactivating ability.

大量的纳米鸽子不断从天空中落下,这些落下的纳米鸽子身上已经没有了黑色的雾气支持,当它们一个个跌落在地面摔成粉碎之后,再也没有了复活的能力。

The plant ventilation status under different conditions is calculated with steady k-ε turbulence model. Results show that different surface has a different impact on natural ventilation. The ground surface constructed with some good heat-absorbing materials will have an enhanced surface effect. The surface effect is fully put into effect at the maximum outdoor windspeed of 1.5m/s.

在稳态条件下,采用k-ε湍流模型,计算了不同工况下的厂房通风状况,结果表明,不同的地表对自然通风的影响是不同的,厂房内的地面采用吸热性能好的材料构筑,会增强地表效应;地表效应得以充分体现的最大室外风速为1.5m/s。

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He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州,并在2005年伊瓦尔街,公寓生活。

Droperidol ( potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道,可能是 QT 间期延长的机制。

The Nazi's cruel treatment of the Jews during the Second World War is beneath contempt .

二战期间纳粹对犹太人的暴行极其可鄙。