蔡司普简单来说,Planar就是对称双高斯结构。1896年,蔡司的工程师Paul Rudolph首次对这种结构进行了尝试。 Planr的名称主要来自于这种结构会具有较为平坦的像场。由于当时的技术条件限制,Planar结构很难有效控制对称结构的色散和慧差。虽然徕卡在1939就用planar结构制造了Summar 50/2,但直到二战结束前,蔡司镜头都还是Tess...
A graph is outer 1-planar (o1p) if it can be drawn in the plane such that all vertices are in the outer face and each edge is crossed at most once. o1p graphs generalize outerplanar graphs, which can be recognized in linear time, and specialize 1-planar graphs, whose recognition is...
A graph is 1-planar if it can be drawn in the plane such that each of its edges is crossed at most once. We prove a conjecture of Czap and Hudák (2013) stating that the edge set of every 1-planar graph can be decomposed into a planar graph and a forest. We also provide simple...
A graph is 1-planarif it can be drawn on the plane so that each edge is crossed by at most one other edge. Such a 1-planar drawing of G is called a 1-plane graph. Clearly, the family of 1-planar graphs is bigger than that of planar ones. The following Figure 2 is a 1-planar...
[headphoneclub.com]OPPO PM-1 Planar Magnetic 是在优酷播出的科技高清视频,于2014-05-15 16:51:11上线。视频内容简介:稍后补充视频简介
Rega首次在新版Planar 1这类入门级黑胶唱盘上配备24V的高精度同步交流电机,配合新的马达PCB传输线路版和铝合金皮带轮,能提供低噪音的运作和更好的速度稳定性。新版Planar 1唱盘采用了创新设计的黄铜主轴承,23毫米厚的高质量转盘配合铝合金皮带轮、配合100%羊毛垫和升级驱动皮带,能进一步改善盘体旋转状态下的共振问题、...
Using ideas from our proof of Theorem 1, we can prove that a 1-planar graph G admits an odd 14-coloring if every proper minor of G is 1-planar. However, in general the class of 1-planar graphs is not closed under edge-contraction [5]. Currently, the best known lower bound comes ...
A graph is 1-planar if it can be drawn on the plane so that each edge is crossed by at most one other edge. In this paper, it is proved that each 1-planar graph with maximum degree Delta is (Delta+1)-edge-choosable and (Delta+2)-total-choosable if Delta a (c) 3/4 16, ...
Unity Shader-反射效果(CubeMap,Reflection Probe,Planar Reflection,Screen Space Reflection) 通过Reflect原理可以推导出平面的反射方程 最后我们得出了A’ = A - 2*|AB| * N (1) N已知,A点已知,现在要求解|AB| 现在|BA|已知了:|BA| = dot(A,N) - dot(P,N) ...
Building on the work of Caro, Petruevski and krekovski, Petr and Portier then further proved that every planar graph admits an odd 8 8 -coloring. In this note we prove that every 1-planar graph admits an odd 47 47 -coloring, where a graph is 1-planar if it can be drawn in the...