| 1. | Second normal - stress difference
第二法向应力差 |
| 2. | First normal - stress difference
第一法向应力差 |
| 3. | Ei ghteen types are formed in space according to major stress difference of modern structure stress field
以现代构造应力场主应力差为主在空间上构成18种类型。 |
| 4. | This kind of structures will cause the principal stress difference bigger due to the sharp changes modulus of deformation between auxiliary core and main core , auxiliary core and upstream and downstream transition materials , which is disadvantage of stress transmission
该种心墙的结构型式，由于副墙与主墙、副墙与上下游侧过渡料的变形模量发生突变，不利于应力的传递，造成主应力差值偏大。 |
| 5. | When the substrate is fr4 , the surface shear stress and normal stress difference is at a low level and near zero during curing process and build up during cooling down because of the mismatch of ctes of silicon and substrate
对于fr4基板，在固化过程中，芯片表面的剪切应力和正应力的值很小，其数值在原点上下很窄的范围内波动。在降温过程中，热膨胀系数的失配随着温度的降低而越来越显著，引起应力的积聚。 |
| 6. | In accordance with the main contradictions between high deterioration degree of coal and low permeability of coal bed , this paper predicts high permeability region by use of new technique and methods including stress field , curvature analysis and major stress difference analysis
针对沁水盆地煤变质程度高、煤层渗透率普遍较低的主要矛盾，利用新技术、新方法，利用应力场、曲率分析方法和主应力差分析方法预测高渗区。 |
| 7. | Part i : this part is about the concept , characteristics , sorts of mafia - style organization . the author stresses difference of the crimes between mafia - style organization and those of mafia organization , non - organized groups , hooligan - style organization and terrorist groups
根据黑社会性质组织的主要活动方式，提出我国黑社会性质组织的类型，并说明黑社会性质组织与黑社会组织、普通犯罪集团、恶势力及恐怖主义组织的区别。 |
| 8. | It puts forward that the open degree of coal reservoir increases with the enhancement of major stress difference by means of the linkage of maxim major stress difference and coal bed physical quality . when major stress difference is larger than loompa , permeability of coal reservoir is larger than 1 . 0md
通过最大主应力差与煤层物性的耦合，认为煤储层裂隙的张开度随主应力差的增强而加大，主应力差100mpa时，煤储层渗透率1 . 0md 。 |
| 9. | It is found during the cooling down in some local region that the normal stress difference varies from positive to negative and then turns positive again . the stress accumulates rapidly in the followed thermal treatment in this region , where the chip - on - board package tends to fail from
在冷却过程中某些局域正应力差的变化规律为：该差值从正值变到负值再回到正值，呈振荡状态；局域随热循环进行应力将急剧增加，即处于应力相对集中的状态，这样的区域是芯片易于失效的区域。 |
