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21.
WU Jun-Xia ZHENG Jian-Hua ZHAO Tie-Cheng MAO Rui-Shi YIN Yan YUAN YoJin YANG Jian-Cheng 《中国物理C(英文版)》2010,34(1)
For any experiment that uses the beam of an accelerator, monitoring the beam intensity is always an important concern. It is particularly useful if one can continuously measure the beam current without disturbing the beam. We report here on test experiments for an Integrating Current Transformer (ICT) used to measure fast extraction beams from the HIRFL-CSR main ring (CSRm). The laboratory tests and beam intensity measurement results are presented in this paper. The influence of the kicker noise is also analyzed. 相似文献
22.
XIA Tie-Cheng YOU Fu-Cai 《理论物理通讯》2005,44(5):793-798
A new 3M-dimensional Lie algebra X is constructed firstly. Then, the corresponding loop algebra X is produced, whose commutation operation defined by us is as simple and straightforward as that in the loop algebra A1. It follows that a general scheme for generating multi-component integrable hierarchy is proposed. By taking advantage of X, a new isospectral problem is established, and then well-known multi-component TC hierarchy is obtained. Finally, an expanding loop algebra FM of the loop algebra X is presented. Based on the FM, the multi-component integrable coupling system of the generalized multi-component TC hierarchy has been worked out. The method in this paper can be applied to other nonlinear evolution equations hierarchies. It is easy to find that we can construct any finite-dimensional Lie algebra by this approach. 相似文献
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In this letter, a new loop algebra G is constructed, from which a new isospectral problem is established. It follows that integrable couplings of the well-known coupled Burgers hierarchy are obtained. 相似文献
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A new simple loop algebra GM is constructed, which is devoted to establishing an isospectral problem.By making use of generalized Tu scheme, the multi-component SC hierarchy is obtained. Furthermore, an expanding loop algebra FM of the loop algebra GM is presented. Based on FM, the multi-component integrable coupling system of the multi-component SC hierarchy of soliton equations is worked out. How to design isospectral problem of mulitcomponent hierarchy of soliton equations is a technique and interesting topic. The method can be applied to other nonlinear evolution equations hierarchy. 相似文献
26.
The multi-component Tu hierarchy of soliton equations and its multi-component integrable couplings system 总被引:3,自引:0,他引:3 下载免费PDF全文
A new simple loop algebra GM is constructed, which is devoted to the establishing of an isospectral problem. By making use of the Tu scheme, the multi-component Tu hierarchy is obtained.Furthermore, an expanding loop algebra FM of the loop algebra GM is presented. Based on the FM, the multi-component integrable coupling system of the multi-component Tu hierarchy has been worked out. The method can be applied to other nonlinear evolution equation hierarchies. 相似文献
27.
稠密氦在高温高压下将会发生电离, 电离能会因为原子、离子以及电子之间的相互作用而降低. 考虑He,He+,He2+,e之间的相互作用, 通过粒子化学势平衡得到非理想的电离平衡方程,用自洽流体变分过程对方程求解, 进而对自由能求导获得体系的热力学状态参量. 模型计算结果与已有的实验和理论计算相一致. 用此模型预测密度10-3—100.3 g/cm3和温度4—7 eV范围的物态方程, 获得了压力在500 GPa以内的理论数据. 计算表明粒子间的非理想相互作用引起的电离能降低是出现压致电离现象的主要原因,在高温高密度物态方程的计算中必须考虑粒子间非理想相互作用对电离能修正的影响.
关键词:
氦
物态方程
部分电离等离子体
自洽变分 相似文献
28.
Ke Liu Duan-Wei He Xiao-Lin Zhou Hao-Ming Wang Tie-Cheng Lu Jing Chang 《Journal of Thermal Analysis and Calorimetry》2013,111(1):289-294
We first introduce the latest experimental results, i.e., production of the fine nanostructured and near fully dense transparent Y3Al5O12 (YAG) bulks at high pressure and modest temperature (2.0–5.0 GPa and 300–500 °C). And then, we employ the first-principles plane wave pseudopotential density functional theory method to calculate the equilibrium lattice parameters and the thermodynamic properties of YAG. The obtained lattice parameters are consistent with the experimental data and the available theoretical data of others. Through the quasi-harmonic Debye model, the dependences of the normalized primitive volume V/V 0 on pressure P, the Debye temperature $ \Uptheta_{\rm{D}} $ , and the heat capacity C V on pressure P and temperature T, as well as the variation of the thermal expansion α with temperature and pressure are obtained successfully. 相似文献
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On the Riemann–Hilbert problem of a generalized derivative nonlinear Schrödinger equation 总被引:1,自引:0,他引:1
In this work,we present a unified transformation method directly by using the inverse scattering method for a generalized derivative nonlinear Schr?dinger(DNLS)equation.By establishing a matrix Riemann-Hilbert problem and reconstructing potential function q(x,t)from eigenfunctions{Gj(x,t,η)}3/1 in the inverse problem,the initial-boundary value problems for the generalized DNLS equation on the half-line are discussed.Moreover,we also obtain that the spectral functions f(η),s(η),F(η),S(η)are not independent of each other,but meet an important global relation.As applications,the generalized DNLS equation can be reduced to the Kaup-Newell equation and Chen-Lee-Liu equation on the half-line. 相似文献
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This work aims to study the negative-order KdV equation in (3+1)-dimensions which is developed via using the recursion operator of the KdV equation by employing the three-wave methods. As a consequence, a variety of novel multiwave solutions with several arbitrary parameters to the considered equation are presented. Moreover, selecting particular values for the parameters, some graphs are plotted to show the spatial structures and dynamics of the resulting solutions. These results enrich the variety of the dynamics in the field of nonlinear waves. 相似文献