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weapon
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  “weapon”译为未确定词的双语例句
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  weapon
An example of determining the working points for a chemical weapon destruction plant was presented.
      
Impact of chemical weapon destruction on the structure of lake zoohydrobiont community
      
Community structure of zoohydrobionts in the lake affected by chemical weapon destruction was studied for the first time.
      
The worldwide fallout of caesium-137 (137Cs) associated with the nuclear weapon tests during the 1950s and 1960s has provided a valuable man-made tracer for studies of soil erosion and sediment delivery.
      
Suicide bombing attacks have emerged as a lethal weapon in the hands of terrorist groups.
      
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This paper describes the parameter identification in frequency domain, the parameter identification in time domain and the technique of model synthesis. All these methods, although being perfected continuously, are useful to the development of weapons. We hope weapon designers will be interested in these methods.

本文介绍频域中的参数识别方法、时域中的参数识别方法和模态综合技术。所有这些方法虽然处在改进的过程,但对武器的研制无疑是有用的。武器设计者对于这些方法将是感兴趣的。

After a brief review of the probaility density functions of diverse random variables, their features and relations in application, the author has worked out the computer programs for analyzing based on both the experimental data of reflectivity of aircraft—like targets measured on real time basis and the mathematical models of the radar cross section, and calculated the practical radar detection probability under the situation of aircraft target echoes with scintilation on mainframe or minicomputers. It is concluded...

After a brief review of the probaility density functions of diverse random variables, their features and relations in application, the author has worked out the computer programs for analyzing based on both the experimental data of reflectivity of aircraft—like targets measured on real time basis and the mathematical models of the radar cross section, and calculated the practical radar detection probability under the situation of aircraft target echoes with scintilation on mainframe or minicomputers. It is concluded that erroneous acquisition may arise beyond a critical range caused by the amplitude scintillation of target echoes and the percentage of detection probability may decrease within the critical range evoked by the angle scintillation. As a result, the effect of the combinatorial events of the above on the engagement will sacrifice the lethality of the weapon system in the scenario of air-defence of air-combat.

本文简要地回顾了各种不同形式随机变量的概率密度函数及其在应用上各自的特点和相互间的关系等后,根据飞机目标反射特点试验中的实测数据及用数学模型表示目标特性的两种情况,编制了分析用程序,在中、小型电脑上计算了飞机目标特性带起伏情况下雷达系统的真实探测概率。结果表明:由于目标反射特性的振幅起伏或角闪烁,前者引起了远距离上的虚假截获;后者又会降低探测概率,以致在防空和空战情景中贻误战机。

Adaptive control technology has been developed significantly over the lastten years for tactical weapon applications, A successful analog adaptive autopilotapplied to air-to-air missile design by American scientists was reported in 1977[1]. They selected a simple method, so called external sinusoidal signal exci-tation method, to implement the on-line parameter identification of the plant.The disadvantage is that the adaptive range is limited. Since then, many re-searchers have studied the digital autopilot,...

Adaptive control technology has been developed significantly over the lastten years for tactical weapon applications, A successful analog adaptive autopilotapplied to air-to-air missile design by American scientists was reported in 1977[1]. They selected a simple method, so called external sinusoidal signal exci-tation method, to implement the on-line parameter identification of the plant.The disadvantage is that the adaptive range is limited. Since then, many re-searchers have studied the digital autopilot, which was made possible throughminiaturization, availability, flexibility, and low cost of digital hardware[2][3], but, to the author's best knowledge, no papers have been reported inthe open literature on the design of the digital adaptive autopilot of tacticalmissiles. The aim of this paper is to study the possibility of designing digital adap-tive autopilot of tactical missiles, using model reference adaptive control(MRAC) with explicit identification. The plant considered is the roll loop ofthe air-to-air missile whose dynamic parameters vary within wide limits. Therecursive least square (RLS) method, with a forgetting factor for the secondorder plant, is selected to implement the on-line parameter identification, anda P+I adaptive law is used to make the plant output follow the referencemodel output very closely. All the differential equations are transformed into difference equationsusing backward difference method in order to avoid the trouble caused by theinherent one-step sampling lag. Some practical problems encounted in the designare discussed. The parameter identifications for two kinds of inputs are given.It is shown that the results of using MRAC with real-time identification are inagreement with those of using MRAC with real values of the plant parameters.

本文对基于辨识和波波夫超稳定性理论的自适应自动驾驶仪设计进行了研究。这里研究的对象是导弹横滚回路,可用二阶时变微分方程近似描述。由于弹体参数在大范围内激烈时变,我们选择了具有遗忘因子的递推最小二乘法,实现实时地辨识对象参数,并且采用了比例加积分型模型参考自适应规律,使对象输出较好地跟踪参考模型输出。计算机仿真的研究给出了两种不同输入信号时的参数辨识的结果,仿真还表明了采用估计的参数进行自适应调参与采用真值实现自适应调参,其响应是一致的。

 
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