This paper presents a practical final-pit optimization algorithm for open-pit metal mines based on a breakeven strip ratio and a block model of ore grade.
给出一个基于经济合理剥采比和品位块状模型的露天金属矿境界优化实用算法。
Results indicate the local high point height and additional tension stress of rolled strip are proportional to local high point initial height of strip, decrease as rolling reduction ratio increases.
研究结果表明：轧后带钢局部高点高度及附加张应力的大小与来料高点高度成正比，随总轧制压下率的增大而减小。
The cause of strip width shrink (SWS) during hot continuous rolling is analyzed. A method to calculate SWS ratio is provided, some approaches for SWS reduction are discussed.
分析了窄带钢热连轧过程宽度拉缩的原因，给出了计算宽度拉缩率的方法，探讨了减少宽度拉缩的技术途径。
Besides, the depth of topmost geogrid to the width of strip footing is also greatly correlative to the safety factor, and the best ratio changes with the layers of geogrids.
此外，顶层筋材埋深与条基荷载宽度比值大小与边坡的安全性密切相关，其最佳比值随加筋层数不同而改变。
Under the width to thickness ratio 625 of strip, this paper studies the 3-dimensional stress distributions of cold strip rolling by cubic spline function finite strip method.
本文在轧件宽厚比为625的条件下，用三次样条函数有限条法研究了冷轧带材三维应力的分布问题。
The influences of strip thickness, forward and backward tension, reduction ratio and resistance to deformation on the edge drop were investigated in detail.
详细研究了带钢厚度、张力、压下率、变形抗力等对边缘降的影响。
The drawing experimental results show that the draw ability of cast-rolled strip under composite energy field was obviously better than the general one, and the earing ratio was only 1.7%.
冲杯实验结果表明：复合能场铸轧板的深冲性能明显优于普通铝板，其制耳率仅为1.7%。
Grains per spike and available spike lets per spike ratio cannot take the wheat anti - strip rust the identification Indexes.
穗粒数和有效小穗数不能作为小麦抗条锈病的鉴定指标。
A new work roll contour is advanced which is a linear variable crown (LVC) roll. This roll contour can realize linear ratio of gap crown and strip width.
提出一种新型线性变凸度工作辊辊型即lvc辊型，这种辊型实现了辊缝凸度调节与板宽成线性化。
The invention discloses a high-square-ratio amorphous nanocrystal strip and the manufacture of an iron core.
本发明公开了一种高方形比非晶纳米晶带材及铁芯的制作。
The influence of over-consolidation ratio on the critical bearing capacity for strip foundation is less significant.
超固结比对条形地基临界荷载的影响较小。
The influence of over-consolidation ratio on the critical bearing capacity for strip foundation is less significant.
超固结比对条形地基临界荷载的影响较小。
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