TEWKSBURY, Mass. | The U. S. Navy has awarded Raytheon Company (NYSE: RTN) two contracts that extend the company's legacy of performance and support for the Aegis weapons system.
美国海军已授予雷神公司两项合同，以提高宙斯盾雷达系统性能并为宙斯盾武器系统提供支持。
Contrast and analyze single lumped mass and two lumped mass, conclude main factors which affect valve system.
对比分析了单质量模型和二质量模型，归纳了影响配气系统的主要因素。
The operation process of the closed variable mass energy transformation and storage (VMETS) system composes of two processes namely the charge process and the discharge process.
变质量能量转换及储存系统运行过程由充能和释能两个过程组成。
This paper analyses the two body problem of kinematical equation and discusses the elastic collision between two particles in the center of mass system.
用质心坐标系分析了二体问题的运动方程，并用质心系讨论了两个粒子间的弹性碰撞问题。
The mass balance system of "one inlet and two outlets" of a CFB constitutes the latter's core concept and is also a key to understanding the mass balance system of the CFB.
循环流化床“一进二出”的物料平衡系统是循环流化床的核心概念，也是理解循环流化床物料平衡的关键。
A stellar system consisting of two stars orbiting about a common center of mASs and often appearing AS a single visual or telescopic object.
由两颗围绕一个共同的中心运行的星组成的星系，经常可用肉眼观看或用望远镜可观察到。
The pneumatic-hydraulic composite transmission system with two-step output liquid pressure automatic switchover from low pressure and mass flow to high pressure and little flow.
具有双级液体压力输出的气—液复合传动系统，能实现低压大流量到高压小流量的自动切换。
In the paper, a theoretical analysis is given for the ordinary helium mass spectrometer method used to detect the "single seal" leakage rate of each two seals in a serial two-seal pneumatic system.
从理论上讨论了用常规氦质谱仪检漏方法测定两密封件串联密封的气路系统各密封件“单密封”泄漏率的问题。
In center of mass system, solved problem of two body had merits of symmetry form, brief description and high precision.
在质心系中，解决两体问题，具有形式对称，描述简洁，精确度高等优点。
The experiment result proves that this system has two merits: getting low temperature water invariably for long time and getting mass cold capacity in a short time.
实验结果证明这种系统有长时间平稳取出低温水和短时间内取大量冷量的优点。
A continuity wave model is put forward for the dispersion process of liquid-liquid two-phase system, by coupling mass and momentum conservation equations of two-fluid model.
以双流体模型为基础，通过质量守恒方程和动量守恒方程的耦合，提出了液液两相系中弥散传质的连续波模型。
They have different kinetic parameter respectly and the ratio of loss of mass in two process is different from mass ratio between PUR and polysilicone in the PUR polysilicone system.
结果表明，改性体系的热分解分两个明显不同的过程进行，两个过程有不同的动力学参数，并且改性体在它们中的失重比与体系中PUR和有机硅的质量比也不相同。
The nonlinear equations of motion with two internal moving-mass actuators are provided, and the influence to the system of moving masses' motion with respect to the vehicle's shell is described.
建立了带有两个可移动滑块的导弹系统非线性运动模型，分析了滑块与弹壳的相对运动关系对系统运动产生的耦合影响。
In this model, the tramcar was regarded as two degrees of freedom spring-mass-damper system, and the track was regarded as Bernoulli-Euler beam that locates on continuous and elastic ballast.
模型中，矿车被等效为两自由度弹簧-质量-阻尼系统，铁轨被等效为铺设在连续弹性道床上的伯努利·欧拉梁，矿车与铁轨的振动相互耦合。
Two impellers are redesigned using the optimization system. In the whole mass flow ranges at design rotating speed, the efficiency is improved obviously and the pressure ratio keeps nearly unchanged.
采用所研制软件，对两个离心压气机工作轮进行优化设计，优化工作轮达到在压比近似不变的前提下效率有效提高。
Two impellers are redesigned using the optimization system. In the whole mass flow ranges at design rotating speed, the efficiency is improved obviously and the pressure ratio keeps nearly unchanged.
采用所研制软件，对两个离心压气机工作轮进行优化设计，优化工作轮达到在压比近似不变的前提下效率有效提高。
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