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- Figure 5. Transfer efficiency of a solder paste related to aperture area ratio and its effect on reflowed bump co-planarity. 图5,锡高转移的效率与孔面积比率及它对回流峰共面度的影响。
- For unknown class label samples set,an unsupervised feature selection algorithm based on center distance ratio principle is proposed. 针对未知类标号的样本集,提出基于中心距离比值准则的无监督特征选择算法。
- The area ratio of bedroom window is in commonly 1/7 to demand of 1/6 OK and contented daylighting. 居室窗户的面积比一般在七分之一到六分之一就可以满足采光需求。
- If the area ratio of your bedroom is lesser, still can use rotate clothes tree, will make full use of limited space, chu Na more clothings. 假如您卧室的面积比较小,还可以利用旋转衣架,来充分利用有限空间,储纳更多的衣物。
- Compared with the arterial injury group,neotima/media area ratio of recombinant human IL-10 group was reduced at 45%( P <0 01). 大鼠颈动脉损伤后 ;rhIL - 1 0治疗组的动脉血管新生内膜 /中层面积比低于对照组约 45%25 (P <0 0 1 )。
- The general rule is that, for acceptable paste release, the area ratio should be greater than 0.66 and the aspect ratio greater than 1.5. 常用的规则是:对于锡膏释放来说,面积比率应大于0.;66,表观比率应答于1
- To remind you of something we learned from biology: the surface area ratio increases when the volume of an object decreases. 要是你还记得的话,上生物课时我们学过:一件物件的表面面积比率,随著物件体积减少而增加。
- Two important dimensionless vari-ables, i. e. dimensionless area ratio of overflow area to under flow area and dimensionless flowrate ratioof ai... 本研究结果有利于充气水力旋流器的进一步放大研究。
- The correlation formula of gas holdup was obtained when the holes area ratio of draft tube was 16.4% and the hydrofoil impeller was upward. 并得到在开孔率为16.;4%25条件下,翼型轴流桨上提操作时的气含率关联式。
- Of greater value to the stencil designer is the area ratio, which can be related directly to eventual solder paste release. 对于钢网设计者来说非常重要的是面积比率。它直接与锡膏释放有关。
- The TOC content in the copolymer can be determinedby quantative calculation of the area ratio of TOC to(TOX+TOC)in the pyrograms. 利用色谱定量的功能,对一系列标样作出了定量工作曲线,得到较好的线性关系。
- The effect of the area ratio of gating system on casting iron quality was studied,and the appropriate area ratio was determined. 探讨了干砂消失模铸造中浇注系统截面比对铸件质量的影响,确定了其适宜的浇注系统截面比。
- The crop of this town basically is given priority to with pachyrhizus, wheaten, corn, and cultivate area ratio is older. 该镇的农作物主要以地瓜、小麦、玉米为主,而且耕种面积比较大。
- Country to equallying shared area ratio exemple did not make clear a regulation, but equally shared the computational method country of the area has a regulation. 国家对公摊面积比例没有明确规定,但公摊面积的计算办法国家有规定。
- The heat engine with different heat leakage has two optimal working conditions, the optimum power and optimum efficiency cann't be attained at the same heat transfer area ratio. 分析表明,当有内热漏存在时,一定温比下热机的最佳功率和最佳效率工作状态分别对应不同的面积比。
- The effects of swirl number of primary swirler and radial swirler,area ratio and sleeve divergence angle on the cold flow field of double swirl air intake were investigated. 试验研究了主、径向涡流器旋流数、面积比、套筒扩张角等参数对双旋流进气装置冷态流场的影响。
- He steered into the parking area. 他把车开进了停车区。
- This paper, using mathematical analysis method,shows that the area ratio of two plane regions bounded by several arbitrary closed curves is an affine invariant. 本文利用数学分析方法,证明了由若干条封闭曲线所围两平面区域面积之比是一仿射不变量。
- Factors,which affect the surface deformation of ceramic disk and the brazed area ratio of the ceramic-metal composite structure tappet,have been investigated in this paper. 而影响挺柱使用性能并与钎焊相关的是钎着率和钎焊引起的变形。
- The campus has centralized green land, afforested courtyard, lawns and so on.The green area ratio reaches 48.3% and the surroundings are beautiful and quiet. 校园内有集中绿地、庭院绿化、草坪等,绿地率达48.;3%25,环境十分幽雅、恬静。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries