Abstract: Provided are novel determination techniques and systems enabling an AI process in which decisions are made from the viewpoint of allowing an expert to make a decision, and capable of providing a valid answer, even with a small amount of learning data, by adjusting errors in both the answer of the expert and the answer of AI. A system is configured to cause an AI process to be performed on subject teacher data for AI learning in which events of objects identified by identifying codes are divided into classes, and data pertaining to an object for which class determination of an event is required, and to receive class determination data obtained by the AI process.

Abstract: The present invention is to provide a communication network designing method based on an actual condition of social network structured on a communication network, a communication network designing program, and a recording medium on which the program is recorded. A communication network designing method executed by a communication network designing apparatus which is connected to a communication network in which a plurality of communication terminals are connected to each other and which designs the communication network is characterized in that a social network formed on the communication network is analyzed, and the communication network is designed on the basis of the analysis result.

Abstract: The present invention is to provide a communication network designing method based on an actual condition of social network structured on a communication network, a communication network designing program, and a recording medium on which the program is recorded. A communication network designing method executed by a communication network designing apparatus which is connected to a communication network in which a plurality of communication terminals are connected to each other and which designs the communication network is characterized in that a social network formed on the communication network is analyzed, and the communication network is designed on the basis of the analysis result.

Abstract: An encoder for suppression of a consecutive identical digit in a digital transmission system has been found for facilitating the reproduction of a clock signal for regenerating reception data, and keeping the average signal level constant. According to the present invention, a single bit (x) is inserted for every predetermined number (m) of input digits, and said insertion bit is a complement of a digit of previous k bits where k is an integer satisfying 1.ltoreq.k.ltoreq.m. Preferably, the value k is 1. The present invention is useful for digital communication higher than 100 Mbits/second, in particular, in optical communication.