Abstract: The level of a symbol information in a symbol-sync part transmitted for the purpose of synchronizing a receiver of a digital radio communications system reflects the state of the concurrent transmission. With this factor taken in account, a symbol determining method is provided which comprises the steps of receiving a symbol information extracted from a symbol-sync part of a received signal obtained by demodulating a received wave and digitizing it; generating thresholds for use to determine the value of the received symbol based on the reception level of the symbol information; determining the value of the received symbol in the data part of the received data based on the thresholds; and reproducing the symbol. Therefore, even if a received symbol is deteriorated due to a degradation, etc. of transmission line, a symbol determination can be done with no degradation of the signal reception due to a narrowing of noise margin, etc.

Abstract: A non-electrification polymeric composite material composed of a tetrafluoroethylene/fluoro(alkyl vinyl ether) copolymer containing 4% by weight or more fluoro(alkyl vinyl ether) and an electrically conductive material.This non-electrification polymeric composite material is suitably used in a holder for holding a semiconductor substrate, or the like.

Abstract: Herein disclosed are both waste gas circulation method and system for effectively recovering waste heat from an on-strand type sintering apparatus which has its sintering and cooling zones extending continuously along a horizontal strand. The hottest waste gases coming from the final stage of the sintering zone and the front stage of the cooling zone, in which the sintering reaction of a charge mixture is completed, are subjected to heat recovery, and sulfur oxides in the hottest gases are prevented from condensing on the water pipe or pipes of a waste-heat boiler by preheating the water, which is supplied for the heat recovery, with the still hot waste gases coming from the downstream half of the cooling zone. The heat of the still hot waste gases are exchanged with cold water so that this water may be heated into hot water. On the other hand, the heat of the hottest gases is exchanged with steam so that this steam may be heated into superheated steam.