Optical node access server is added into network composed of connected optical transceiver, coaxial cable, amplifier, splitter, allotter and socket of coaxial cable. Optical fiber interface in optical transceiver through optical fiber is connected to front-end system, and interface of coaxial cable through coaxial cable is connected to optical node of the access server. The optical node access server is connected to amplifier or splitter or allotter. The amplifier is connected to the splitter, or optical node of the access server. Splitter is connected to splitter or allotter or amplifier or optical node of the access server or socket of coaxial cable. Allotter is connected to socket of coaxial cable. Thus, optical fiber coaxial hybrid network in multiple layer architecture is structured. The invention realizes reliable information feedback and solves issue of concourse interference so as to raise capability of anti-interference in HFC network.

Method for solving convergence interference using multi-nierarchy structure

Disclosed in the invention is an AV modulation output-tuning receiving integrated module group comprising an AV modulation module and a tuning receiving module. The integrated module group is characterized in that a carrier signal is inputted into the AV modulation output-tuning receiving integrated module group and is filtered and amplified; the processed signal is transmitted to a power divider for signal distribution; one path of output of the power divider is connected to the tuning receiving module and the other path of output is connected to a signal mixer I and the output of the AV modulation module by an analog switch II for mixing and outputting, thereby realizing the function of the AV modulation output and the tuning receiving. According to the AV modulation output-tuning receiving integrated module group provided by the invention, the number of needed components is substantially reduced; the material cost is substantially lowered; the needed size is reduced; and the production complexity is also reduced. Meanwhile, the signal loss during the transmission process can be reduced. Moreover, the AV modulation output signal can be ensured not to enter an antenna or a wired television system by mistake, so that the product performance and applicability are substantially improved.

AV modulation output-tuning receiving integrated module group

Broadband access system and access method implemented on cable TV network

The invention provides a wood dyeing method which comprises the following steps: pretreating wood by using an amine compound, and dyeing the pretreated wood by using an acid dye, wherein the amine compound is a product obtained by quaternization of a polymerization product obtained by reaction of a polyamine compound and organic carboxylic acid. According to the dyeing method provided by the invention, the dyeing efficiency can be remarkably improved, and the dyeing depth, color fastness and other qualities of dyed wood are improved.

Wood dyeing method

The invention relates to a colored cellulose fiber and a preparation method thereof. The preparation method comprises the following steps: extruding a cellulose fiber spinning liquid by using a spinning jet, curing, tensioning, and washing with water to obtain water-washed yarns, wherein the water washing temperature is greater than or equal to 90 DEG C; further treating the water-washed yarns byusing a solution of a dye of 40-90 DEG C; finally carrying out rinsing and drying to obtain the colored cellulose fiber, wherein the rinsing temperature is 20-40 DEG C, and the dye comprises one or more of X, Y and Z groups; the X, Y and Z groups are correspondingly groups which can form covalent bonds with cellulose hydroxyl, groups which have self-crosslinking reactions, and groups which can form hydrogen bonds with cellulose hydroxyl. The mass of the dye in the colored cellulose fiber accounts for 0.1-0.5% of the mass of a cellulose fiber matrix, and the colored cellulose fiber is excellentin water washing resistance. The method provided by the invention is simple and feasible, and the colored cellulose fiber is good in durability.

Method for preparing colored cellulose fiber

An HFC-based integrated service network is composed of optical fibre/coaxial cable mixed network HFC, local CATV distributed network, digital office terminal, network interface unit and network managment center, and features low cost, simple structure, flexible networking mode, low hopper noise of HFC and integrated transmission of multiple serices including telephone.

Integrated service network based on HFC

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Integrated service network based on HFC