ilikemath
看你到处求这个问题的解答,想必是很辛苦。帮你google了一下。
“Geons几何粒子(geometrical icons)”是浙大05年心理学考研真题,似乎国内的书上根本找不到答案,但是可以看一些英文资料:
In psychology, Geons are geometrical primitives out of which everyday objects can be represented, as suggested by psychologist Irving Biederman.
In geology, Geons are numerically specified geologic time intervals (geological eons) 100 million years long, counted backward from the present.
In physics, Geons are gravitational wave packets confined to a compact region by the gravitational attraction of their own field energy.
Geons are simple 3-dimensional forms such as spheres, cubes, cylinders, cones or wedges. One theory of object recognition, Recognition by components (RBC) (Biederman, 1987), proposes that visual input is matched against structural representations of objects in the brain. These structural representations consist of geons and their interrelations (e.g., an ice cream cone could be broken down into a sphere located above a cone). Geons can be used to represent a large number of possible objects with very few components; e.g., 24 geons can be recombined to create over 10 million different two-geon objects.
There are 2 essential properties of geons:
Viewpoint-invariance: they can potentially be distinguished from one another from almost any perspective (one exception being that from an end-on view, a cylinder can look like a sphere)
Stability: recognition of geons is often robust to occlusion and degradation by visual noise
偏相关:当研究某一种因素对另一种因素的影响或相关程度,而把其它因素的影响排除在外,单独研究这两种因素之间的相关系数时,就要使用偏相关分析方法,偏相关程度用偏相关系数来衡量。这个也是很常见的统计方法。至于你问的最小二乘和中心极限定理,我想随便找本概率统计书,上面都有写的,还是自己动手吧,自己动手才有收获。