Fibroblast growth factor from the extraembryonic endoderm (hypoblast, a cell layer unique to amniotes) directs the expression of Wnt planar-cell-polarity pathway components to the intercalation domain.
尤其是，这项工作显示了一个原肠胚形成之前的早期插入事件，它可能是回答关于羊膜动物原始条纹是怎样从远古胚孔演化而来这样一个经典问题的关键。
The factors which determine the quality (Q) factor of planar spiral inductor are presented in this paper, and a technology to fabricate suspended MEMS devices for RF circuits is presented.
本文系统分析了影响平面螺旋电感Q值的主要因素，并制作出一种应用于射频通信的硅微机械悬浮结构电感。
Concrete attenuation factor is measured using antenna which is radiated concrete planar, and power value is measured both metal plate is placed behind concrete and metal plate is not placed. By calculating the margin and bring it into formula, attenuation factor is gained.
混凝土的衰减因子的测量采用天线照射混凝土平面，测量出混凝土后面放置金属板和不放置金属板功率值，通过计算它们的差值并代入衰减公式得到衰减因子的值。
Using a blending factor, a parametrized singular polyline is blended with the hyperbolic polynomial B-spline curve to automatically generate a C2 (or G1) continuous hyperbolic polynomial B-spline with a shape parameter, which interpolates the given planar data points.
把一个参数化的奇异多边形与双曲多项式B样条按某一个因子调配，可自动生成带形状参数且插值给定平面点列的C2（或G1）连续的双曲多项式B样条曲线。
It is found that both of the inductance and Q-factor of this inductor had higher values than those of traditional planar spiral inductors. Study on Deforming of Planar Spiral Antenna
研究表明，双层悬空结构的圆形射频微电感不仅具有较大的电感量，而且其Q值也较高；平面螺旋天线的变形探讨
Substrate integrated waveguide (SIW) realizes rectangular waveguide of solid structure on planar circuit substrate. It has some advantages such as high Q-factor, low loss, low cost, easily being integrated on planar circuits.
基片集成波导（SIW）在平面电路基板上实现了矩形波导的立体结构，因此它具有高Q值、低损耗、低成本和易于平面集成等优势。
It is shown that the metal thickness effect on the Q-factor depends on the diameter of the innermost turn in a planar spiral inductor.
仿真的结果表明，金属线厚度对电感Q值的影响在很大程度上取决于电感内径的大小。
In the case of planar failure surface, the analytical formulas are obtained for the critical slip surface and the minimum safety factor.
对于平面滑动，给出了边坡的临界滑裂面和最小安全系数的解析算式；
Both planar electromechanical coupling factor Kp and thickness electromechanical coupling factor Kt decrease initially and then increase.
复合材料的平面机电耦合系数Kp与厚度机电耦合系数Kt随着基体中水泥质量分数的增加均先减小后增大。
The stress concentration factor of multi-planar tubular KK-joints subjected to balanced axial loads is analyzed using finite element method.
采用有限元法分析了空间KK型管节点在承受平衡轴力作用下的应力集中系数。
It is desirable for high-power piezoelectric ceramics to combine a low dielectric loss a high mechanical quality factor with a high piezoelectric constant and a high planar coupling factor.
大功率压电陶瓷要求材料不但在强场下有小的介质损耗，大的机械品质因数，同时兼备一定的压电常数和机电耦合系数。
This paper points out and corrects some wrong data of planar multiplicity factor for X-ray powder diffraction in many books concerning X-ray diffraction according to the definition of crystal plane group, Miller indices and planar multiplicity factor.
本文从晶面族，晶面指数和多重性因数的原始定义出发，指出目前的大多数有关X光衍射的论著中所给出的粉末衍射的多重性因数的数据存在错误，并予以了更正。
The emulation experiment revision method of getting error transmission factor of planar linkages with joint clearance
求含间隙平面连杆机构误差传递系数的模拟实验修正法
In 3-D motion estimation problem in order to determine motion parameters of rigid object in space, we use planar patch motion model and successive perspective image to estimate motion parameters including rotation matrix and translation vector with a scale factor.
在三维物体运动估计问题中，为确定空间中物体运动参数，我们利用小平面运动模型和两幅投影图象去估计运动参数，包括旋转矩阵和平移向量。