5 resultados para Bioroot rcs

em Chinese Academy of Sciences Institutional Repositories Grid Portal


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A dynamic measurement system was developed by the Institute of Modern Physics (IMP) for the dipole prototype of Rapid Cycle Synchrotron (RCS) of China Spallation Neutron Source (CSNS). The repetition frequency of RCS is 25 Hz. The probe is a moving arc searching-coil, and the data acquisition system is based on the dynamic analysis modular of National Instrument. To get the error of high order harmonics of the field at basic frequency, the hardware integrator is replaced by a high speed ADC with software filter and integrator. A series of harmonic coefficients of field are used to express the varieties of dynamic fields in space and time simultaneously. The measurement system has been tested in Institute of High Energy Physics (IHEP), and the property of the dipole prototype of RCS has been measured. Some measurement results and the repeatability of system are illustrated in this paper.

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分布环境下的应用处理与资源共享将面临不同层次的异构性(包括:数据库层,操作系统层和网络层),为此我们提出了一种基于客户/服务器结构的远程协作系统,该系统是建立在数据库远程过程调用(DBRPC)的机制之上的,其特点是通过其底层的抽象通信平台(Stepgate)能实现与各种网络协议的互联。同时也能支持其上层应用系统对各种远程资源(数据资源、操作处理资源等)实现同步或异步远程访问与操作。进而支持异构分布环境下的资源共享与分布处理。

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对再入飞行器等离子体尾迹及其雷达散射特性进行了分析、研究和大量的计算.讨论了物形、流场各因素对尾迹雷达散射截面的影响.流场计算使用准一维粘性尾迹方程,以修正基尔方法(多值法)求解,用一阶Born近似完成亚密雷达散射截面(RCS)计算.给出了研究结果.、

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就高超声速再入体尾迹等离子体场而言,为进行其亚密湍流雷达散射截面的理论分析,提出了计算湍流尾迹脉动等离子体场强的理论模型及求解方法,即在研究高超声速尾迹流动特征的基础上,推导、使用包括化学组份浓度脉动强度的K-ε-g湍流模型,用以封闭高超声速粘性尾迹湍流运动时均控制方程组,并用全隐式有限差分法求解,算例小钝锥体的飞行条件为零攻角、M_∞=21.3,Re_(∞D)=1.33×10~6,M_∞=20.5,Re_(∞D)=3.22×10~5,计算结果得到了合理的参数分布;考虑电磁波在上述等离子体介质中的传播,以单电子多次散射模型---畸变波Born近似方法,计算了湍流尾迹脉动等离子体雷达散射截面,给出散射能(RCS)在不同极化状态下的分布,分析了散射背景场脉动湍流对电磁波在其中传播的影响。