The Mainly methods of preparation and the present status and developing tendency of domestic modified asphalt were discussed.
论述了改性沥青的主要制备方法、国内改性沥青生产工艺现状和发展趋势。
The main methods and present status for solidification microstructure in numerical simulation were introduced and reviewed. The problems to be faced and developing tendency in the field were proposed.
介绍了主要的凝固微观组织数值模拟方法，评述了铸件凝固微观组织数值模拟的研究现状，指出了该领域目前面临的问题和未来发展趋势。
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