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Calorimetric transverse energyenergy correlations as a probe of jet quenching


The parameters , , (with ) and are extracted from the energy spectra of the charged decay leptons and from their energyenergy correlations.


In hadronic Z0 decays collected by the OPAL experiment at LEP, event shape variables such as jet rates, jet masses, thrust and the energyenergy correlation for


Energy flows in both the laboratory frame and the hadronic centre of mass system and energyenergy correlations in the laboratory frame are presented.


A new measurement of αs is obtained from the distributions in thrust, heavy jet mass, energyenergy correlation and two recently introduced jet broadening variables following a method proposed by Catani, Trentadue, Turnock and Webber.

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 Theoretical computations and analyses are made of the efficiencies of selfsustained discharge transverseflow CO2 lasers. A model of onedimensional steady flow, quasitwo dimensional discharge and three vibrational relaxing modes is used under various conditions of discharge, flow and cavity position in the flow direction. Efficiencies of the cascade processes (input electrical energyenergy of upper vibrational levels, energy of upper vibrational levelsoutput laser energy, and input electrical energyoutput... Theoretical computations and analyses are made of the efficiencies of selfsustained discharge transverseflow CO2 lasers. A model of onedimensional steady flow, quasitwo dimensional discharge and three vibrational relaxing modes is used under various conditions of discharge, flow and cavity position in the flow direction. Efficiencies of the cascade processes (input electrical energyenergy of upper vibrational levels, energy of upper vibrational levelsoutput laser energy, and input electrical energyoutput laser energy)are given as fuctions of electrode width,ga.sflow Telocity and cavity position, A theoritioal reference is thus provided for properly selecting laser parameters, such as discharge conditions, flow parameters and cavity configurations.  本文用一维定常流动、准二维放电、三振型弛豫模型、计算分析了自持放电横流CO_2激光器的输入电能→激光上能态振动能→输出光能以及输入电能→输出光能诸过程的转换效率随电极宽度、气流速度和光腔位置等参数的变化规律,从而为器件的放电条件、流动参数、光腔结构的合理设计提供理论依据。  In a previous paper (1979), the minimum potential energy principle and stationary complementary energy principle for nonlinear elasticity with finite displacement, together with various complete and incomplete generalized principles were studied. However, the statements and proofs of these principles were not so clearly stated about their constraint conditions and their Ruler equations. In some cases, the Ruler equations have been mistaken as constraint conditions. For example, the stress displacement relation... In a previous paper (1979), the minimum potential energy principle and stationary complementary energy principle for nonlinear elasticity with finite displacement, together with various complete and incomplete generalized principles were studied. However, the statements and proofs of these principles were not so clearly stated about their constraint conditions and their Ruler equations. In some cases, the Ruler equations have been mistaken as constraint conditions. For example, the stress displacement relation should be considered as Euler equation in complementary energy energy principle, but have been mistaken as constraint conditions in variation. That is to say, in the above mentioned paper, the number of constraint conditions exceeds the necessary requirement. Furthermore, in all these variational principles, the stress strain relation never participate in the variation process as constraints, i. e., they may act as a constraint in the sense that, after the set of Ruler equations is solved, the stressstrain relation may be used to derive the stresses from known strains, or to derive the strains from known stresses. This point was not clearly mentioned in the previous paper (1979). In this paper, the high order Lagrange multiplier method (1983) is used to construct the corresponding generalized variational principle in more general form. Throughout this paper, V. V. Novozhilov's results (1958) for nonlinear elasticity are used.  在前文中,作者首次提出了大位移非线性弹性力学的位能原理和余能原理,以及各种完全的和不完全的广义变分原理.但在约束条件和欧拉条件上,证明和叙述都不很明确,有时甚至把原来应该是欧拉方程的误认为是约束条件,如余能驻值原理中,应力位移关系原应是欧拉方程,但把它当作了变分约束条件.这就是说:我们把余能驻值原理约束得超过了必要的要求.还有,在所有变分原理中,应力应变关系式都是不参加变分的约束条件,亦即,他们是从已定应力导出应变或从已定应变导出应力的约束条件.这一点,在文[1](1979)中,并未明确指出.本文并将用高阶拉氏乘子法,导出更一般的广义变分原理(1983).本文使用V.V.Novozhilov的有关非线性弹性力学的成果(1958).  In this paper, the principle and application of a new, realtime, onboard energy/energy rate instrument aid is described. It provides a way for practicality of performance optimization theory method. In addition, the flight path optimization algorithm based on energy state approximation is summarized. By this instrument aid, the pilots may optimally manage the aircraft's limited kinetic, potential, and chemical energy resources, and the flight performance of aircraft can be improved.  本文叙述实时、机载、新型的能量与能量率辅助仪表的原理和应用,它为性能优化理论方法的实用化提供了一条途径。而且,总结了基于能量状态近似法的飞行轨迹优化算法.通过使用该仪表,可使飞行员最优化地管理支配飞机有限的动能、位能和化学能资源,从而改善飞机的作战性能.   << 更多相关文摘 
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