The D type inclusions in steel can be effectively removed by reducing the aluminum wire-feeding quantity,lowering the basicity of furnace slag,controlling the Al_2O_3 content,ensuring the slight stirring time and enhancing the slag floating-up.
减少铝线喂入量,降低炉渣碱度、控制渣中Al2O3含量可有效减少D类夹杂物的生成。
Based on the Modern Portfolio Theory(MPT),this paper examines the choice of risk diversification strategies between property type and region within the real estate market.
基于现代投资组合理论,探讨了房地产投资组合风险管理中,按照物业类型与按照地理区域分散投资风险的选择问题。
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