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Based on the mechanism of deformation of rocks, porosity-depth curves of rocks can be divided into tow periods as compaction and compression.
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摘要根据岩石的变形机制，把岩石孔隙度的变化过程划分为压实和压缩两个阶段，岩石压实阶段的孔隙度呈指数规律变化，岩石压缩阶段的孔隙度保持为常数。 |
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Based on the mechanism of hot cracking formation of castings, the cracking defects of furnace door frame castings was analyzed, and found that the main reasons causing cracking are as follows: construction of the casting was not reasonable, gating system
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摘要根据铸件产生热裂纹的机理，对炉门框裂纹缺陷进行分析，找到了裂纹产生的主要原因是铸件结构和浇注系统不合理，以及浇注温度过高。 |
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Based on the mechanism of the effect of unconsolidated confined aquifer on the compound breakage of key strata, the fully mechanized support crushing accidents taking place during coal mining under the unconsolidated confined aquifer and thin bedrock in s
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基于松散承压含水层对薄基岩采场关键层复合破断影响机制，很好地解释华东矿区部分矿井在松散承压含水层与薄基岩的特殊条件下采场发生压架事故的原因。 |
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Based on the mechanism of water inrust at karst collapse column,the factors which affect the rational size calculation of the coal column applied to prevent water inrush are analysed,and the formulas to determine the minimum size of the coal column are ob
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根据岩溶陷落柱突水的力学机理，分析了防突煤柱合理尺寸计算的影响因素；利用岩石强度理论得到了防突煤柱保持稳定所要求的最小尺寸计算公式。 |
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Based on the meeting day, the location of the club, or a special event, attempt to group the clubs so that you are visiting neighboring clubs or conducting an intercity meeting on consecutive days.
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然后以会议的日期、扶轮社的所在地、或一个特别活动为基础，来将地区内的扶轮社分区，以便安排连续几天，访问同一分区内邻近的扶轮社或举办一次埠际会议。 |
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Based on the melting experiments of PP powder in twin-screw extruder, the melting capacity of different screw-thread sets and the revolution of the screw was studied.
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摘要通过对PP粉料在双螺杆挤出机中的熔融实验，研究了不同螺纹组合和螺杆转速对物料的熔融能力。 |
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Based on the mental space theory provided by Fauconnier, this paper is an exploration of the working mechanism of the generation and comprehension of oxymoron.
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本文试图从心理空间理论入手来探寻反比的生成及理解机制，旨在说明反比同隐喻一样在某种程度上的人类认知心理和体验的结果。 |
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Based on the method of hierachical analysis, by use of the method of fuzzy evaluation, this paper synthetically takes the UAV's own system and various cases in battle into account, presents a complete evaluation indexes system of the UAV's operation effic
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摘要以层次分析法为基础，应用模糊评价的方法，综合考虑无人侦察机自身系统以及在作战运用中的多种情况，提出了完整的无人侦察机作战效能评估指标体系。 |
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Based on the method of least squarest the datasheets and charts which were used in designing involute worm gearing were formulated, then designed the predigested computer aided design program.
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摘要运用最小二乘法对渐开线蜗杆传动设计计算的有关数表和线图进行了公式化处理，进而研制了这种传动的简化计算机辅助设计程序。 |
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Based on the method of limitation analysis of soil plasticity, researching from the soil arching mechanism of soil-nailing retaining, the upper limit of the critical height of soil-nailing slopes and the minimum horizontal length from coping of the potent
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摘要基于土的塑性极限分析方法，以均质土坡为例，从土钉支护结构的准粘聚力理论出发，综合考虑土体自重、坡顶的条形荷载，以及土钉与土体的相互作用的机理，推导出了土钉支护的临界高度的上限值和潜在螺旋曲线滑动面在坡顶方向距基坑边沿的最小水平距离解析表达式，可供基抗支护设计参考。 |
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Based on the minimum potential energy principal, the influences of three loads, which are concentrated force, trapezoidal load and sinusoid load, over shear lag of cantilever single-box-single-cell box girder are deducted and discussed, and a conclusion i
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以最小势能原理为基础，推导并讨论了3种形式的荷载：集中力、梯形荷载、正弦形荷载对悬臂单箱单室箱形梁剪力滞的影响，得出考虑剪力滞效应后弯曲法向应力有较大变化的结论，对设计人员确定截面尺寸、截面配筋具有一定的指导意义。 |
