The traditional Chinese characters and the simplified Chinese characters are one of special writings in the history of Chinese characters, both of two characters owe the meaning and value in Chinese history. The essay criticize 13 points of characters principles between the traditional and the simplified Chinese characters, we discover that there have several writings lost function of the original phonetic component or pictograph in this vertical line relationship, and it make burden easily to people who learn and realize the simplified Chinese charactersnowadays. Therefore, the traditional Chinese characters have important condition that cannot be displaced and the work of revolution in Chinese characters in future need to consider the special relation betweentwo characters.

The loop closure problem is one of the most challenging issues in the vision-based simultaneous localization and mapping community. It requires the robot to recognize a previously visited place from current camera measurements. While the loop closure often relies on visual bag-of-words based on point features in the previous works, however, in this paper we propose a line-based method to solve the loop closure in the corridor environments. We used both the floor line and the anchored vanishing point as the loop closing feature, and a two-step loop closure algorithm was devised to detect a known place and perform the global pose correction. We propose an anchored vanishing point as a novel loop closure feature, as it includes position information and represents the vanishing points in bi-direction. In our system, the accumulated heading error is reduced using an observation of a previously registered anchored vanishing points firstly, and the observation of known floor lines allows for further pose correction. Experimental results show that our method is very efficient in a structured indoor environment as a suitable loop closure solution.