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The ionization spectrum of sulfur dioxide has been successfully studied by using the symmetry-adapted-cluster configuration-interaction (SAC-CI) general-R and SD-R methods and the basis set correlation-consistent polarized valence triple-zeta (cc-pVTZ). The SAC-CI general-R method reproduces the experimental spectrum well for both the main peaks and the satellite peaks of ionization spectrum of SO2. The sequence of ionic states corresponding to main peaks of SO2 has been re-determined according to the SAC-CI conclusions and it is reordered as X^2A1, A^2B2, B2A2, C^2B1,D^2A1, E^2B2 and F^2A1. Besides, the equilibrium structures and adiabatic ionization potentials (AIPs) of ionic states of main peaks of SO2 are calculated by using the SAC-CI SD-R method. 相似文献
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ChenChangya PanJin WangDeyu 《Acta Mechanica Solida Sinica》2005,18(2):173-180
With the development of satellite structure technology, more and more design parameters will affect its structural performance. It is desirable to obtain an optimal structure design with a minimum weight, including optimal configuration and sizes. The present paper aims to describe an optimization analysis for a satellite structure, including topology optimization and size optimization. Based on the homogenization method, the topology optimization is carried out for the main supporting frame of service module under given constraints and load conditions, and then the sensitivity analysis is made of 15 structural size parameters of the whole satellite and the optimal sizes are obtained. The numerical result shows that the present optimization design method is very effective. 相似文献
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量子密码实验新进展--13km自由空间纠缠光子分发:朝向基于人造卫星的全球化量子通信 总被引:2,自引:0,他引:2
实验实现了纠缠光子对通过地面大气13km的自由空间分发.实验表明,纠缠光子在通过超过大气层等效厚度的距离之后,纠缠特性依然能够很好保持.文章作者观测了类空间隔Bell-CHSH不等式的破坏,其S值达到2.45±0.09.在这个基础上,我们利用分发的纠缠光子对演示了BB84-Ekert91量子密码协议.这个实验第一次验证了用纠缠光子对进行地面和卫星量子通信的可行性,为未来的基于人造卫星全球化量子通信打下坚实的基础.文章将首先回顾量子密码实验方面的最新进展,然后再详细介绍作者的实验. 相似文献
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轨道动力学和姿态动力学是航天力学中两个重要课题,本文介绍凯恩方程及其在卫星姿态动力学中的具体应用。 相似文献
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由于激光技术可使人造卫星轨道测量精度大大提高,因此轨道计算必须考虑广义相对论效应.本文将中间轨道理论推广到考虑广义相对论效应的人造卫星轨道计算中,给出了相对论中间轨道的积分,并导出了以轨道参数为变量的相对论摄动运动方程. 相似文献
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The stability and singularity problem of agile small satellite (ASS) with actuator failure is discussed in this paper. Firstly, the three-axis stabilized controller of an ASS is designed, where micro control moment gyros (MCMG's) in pyramid configuration (PC) is used as the actuator. By using the same controller and steering law, the control results before and after one gyro fails are compared by simulation. The variation of singular momentum envelope before and after one gyro fails is also compared. The simulation results show that the failure intensively decreases the capacity of output torque, which leads to the emergence of more singular points and the rapid saturation of MCMG's. Finally, the parameters of system controller are changed to compare the control effect. 相似文献
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《万有引力定律》这一章共三单元六小节,其中第六节《行星、恒星、星系和宇宙》为介绍性内容,知识点总量不多,课堂教学内容也相对单一,但完成整个章节教学后,学生对知识的掌握程度与教师的期望仍有一定距离,学生认为掌握本章知识不容易,特别是第四节《万有引力定律在天文学上的应用》和第五节《人造卫星宇宙速度》更觉困难。导致这一现象的原因是多方面的,以下几个问题是直接影响学生掌握本章知识的重要因素。 相似文献