病毒性心肌炎与微量元素关系的探讨

应用日本岛津ＩＣＰＱ－１０１２型高频等离子体发射光谱仪测定了病毒性心肌炎组４７例和正常儿童组６０例全血中１４种元素的水平，结果表明，心肌炎组血锌、铁、铜、钴、钛、铬、镍、铅、钛、镉的含量低于正常组，两者间有显著和非常显著性差异（Ｐ〈０．０５，Ｐ〈０．０１），血钼、锶则高于正常组，且有显著性差异（Ｐ〈０．０５），血锰、镁、钙与正常组无差异（Ｐ〉０．０５），提示病毒性心肌炎的患儿存在着血锌、铁、铜、钴     

Darboux Transformation and Soliton Solutions for a Variable-Coefficient Modified Kortweg-de Vries Model from Fluid Mechanics,Ocean Dynamics,and Plasma Mechanics

This paper is to investigate a variable-coefficient modified Kortweg-de Vries （vc-mKdV） model, which describes some situations from fluid mechanics, ocean dynamics, and plasma mechanics. By the AblowRz-Kaup-NewellSegur procedure and symbolic computation, the Lax pair of the vc-MKdV model is derived. Then, based on the aforementioned Lax pair, the Darboux transformation is constructed and a new one-soliton-like solution is obtained as weft Features of the one-soliton-like solution are analyzed and graphically discussed to illustrate the influence of the variable coefficients in the solitonlike propagation.     

N-Fold Darboux Transformation and Bidirectional Solitons for Whitham-Broer-Kaup Model in Shallow Water

Under investigation in this paper is the Whitham Broer-Kaup （WBK） system, which describes the dispersive long wave in shallow water. Through a variable transformation, the WBK system is casted into a general Broer-Kaup system whose Lax pair can be derived by the Ablowitz-Kaup Newell-Segur technology. With symbolic computation, based on the aforementioned Lax pair, the N-fold Darboux transformation is constructed with a gauge transformation and the multi-soliton solutions are obtained. Finally, the elastic interactions of the two-soliton solutions （including the head-on and overtaking collisions） for the WBK system are graphically studied. Those multi-soliton collisions can be used to illustrate the bidirectional propagation of the waves in shallow water.