Principles of four processes for producing cobalt powders for hard alloys and properties of the corresponding products are compared.
相比之下，用热离解法和多元醇还原法生产的产品具有纯度高、粒度细、分布均匀，呈球形等优点，符合目前硬质合金生产的要求。
The Kadomtsev-Petviashvili equation in dusty plasma with non-thermal ions and variable dust charge;
含有非热离子及尘粒电荷变化的尘埃等离子体中的KP方程
Considering the effects of hot dust fluid with non-thermal ions and variable dust charge, we study the self-consisted system parameters on the structures of the dust-acoustic solitary waves by reductive perturbation methods.
本论文研究无磁化、无碰撞的、由大质量且带负电量的尘埃颗粒、电子和离子组成的尘埃等离子体,考虑尘埃流体的温度、非热离子和尘埃颗粒电荷绝热变化的因素,使用约化摄动方法研究这个自洽的系统的参数对尘埃声孤波结构的影响。
The tracks of cold/hot ions in the Io plasma torus;
木卫一等离子体环中冷热离子的轨迹
The thermistor problem is a coupled system of nonlinear PDES which consist of the heat equation with a Joule heating as a source, and the current conservation equation with temperature dependent electrical conductivity.
发展热离子问题是由含Ｊｏｕｌｅ热源的热传导方程及具有与热有关的电导率的电流守恒方程组成的非线性偏微分方程组，此方程组具有强的非线性性。