173 resultados para 329-U1371G


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介绍一种由新研制的由分立元件组成的快放大器。该电路是一个交流耦合放大器,具有较高的电源增益(Av≥500),快的上升延(tr≤1.7ns),低噪声(等效到输入端噪声vn≤3μs),该放大器主要用于我所束流诊断系统中放大来自相位探针的微弱信号。

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简单地介绍了重丰中子远离核研究的科学意义,报告了重丰中子新核素的产生、分离和鉴别方法。

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在同位旋相关的量子分子动力学模型框架下 ,通过分析中间快度的方位角分布研究了 4 0MeV/u 5 8Fe + 5 8Fe和5 8Ni+ 5 8Ni反应体系在不同碰撞参数下的转动集体流 ,并且半经典地计算了转动观测量 .发现丰中子体系 (5 8Fe + 5 8Fe)具有较强的转动集体流 ,这种现象在半周边碰撞中更加明显 .转动集体流的同位旋相关性主要来自于核子 -核子碰撞截面的同位旋相关性和对称能的影响 .

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Within the framework of a nonlinear chiral Lagrangian we explore the nontrivial nature of f(0)(600) and f(0)(1370) in terms of quarkonium, tetraquark and gluonium components. The mass constraints are obtained and the strong and radiative partial widths are calculated to demonstrate and discriminate these components. The static properties of f(0)(1500) and glueball are also studied. Our results are confronted with the experimental and theoretical data available as well as the upcoming measurements. (C) 2010 Elsevier B.V. All rights reserved.

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本文从城市景观生态规划的概念出发,论述了城市景观生态规划的原则和内容,探讨了规划中亟待解决的一些问题及今后的发展趋势。