Abstract: The present invention relates to silicon-based powders and a method for producing the silicon-based powders. The method for producing the silicon-based powders includes a hydrolysis step of a silicon precursor having an alkoxy group, a condensation step and a drying step. By a specific weight ratio of water to the silicon precursor having the alkoxy group and a silicon precursor having a secondary amino group and an alkyl group, in the method for producing the silicon-based powders, the condensation step can be performed without organic solvents, and a modification on silicon-based gels can be performed to enhance a safety of processes and a hydrophobicity of the resulted silicon-based powders, and decrease a thermal conductivity and a bulk density of the resulted silicon-based powders.

Abstract: The present invention relates to a fiber composite material and a method for producing the fiber composite material. The method for producing the fiber composite material includes a hydrolysis step of a silicon precursor having an alkoxy group, an in-situ condensation step and a drying step. A specific silicon precursor having a secondary amino group and alkyl groups is used therein, as well as a specific weight ratio of the silicon precursor to a fiber material, the in-situ condensation step can be performed in the absence of organic solvents in the method for producing the fiber composite material, and a hydrophobic modification on silicon-based gels can be performed, thereby simplifying the process, decreasing a thermal conductivity of the resulted fiber composite material and preventing drop dust of the resulted fiber composite material.

Abstract: An integrated hybrid circuit includes a transmission unit, a transceiver coil, a transceiver circuit, a hybrid matching circuit, and a receiving circuit. The transmission unit generates a pair of upstream signals according to a user transmission signal. The transceiver coil transmits the pair of upstream signals to a central office through a pair of twisted pair, and receiving a pair of downstream signals from the central office through the pair of twisted pair. The hybrid matching circuit receives an adjustment signal to adjust selective impedances. The receiving circuit receives the pair of downstream signals from the central office, and generates the adjustment signal according to downstream and upstream rates and signals from the hybrid matching circuit. The transmission unit adjusts transmission power and bandwidth of the transmission unit and the receiving unit adjusts filter bandwidth of the receiving unit according to the adjustment signal for optimizing upstream and downstream rates.

Abstract: An integrated hybrid circuit includes a transmission unit, a transceiver coil, a transceiver circuit, a hybrid matching circuit, and a receiving circuit. The transmission unit generates a pair of upstream signals according to a user transmission signal. The transceiver coil transmits the pair of upstream signals to a central office through a pair of twisted pair, and receiving a pair of downstream signals from the central office through the pair of twisted pair. The hybrid matching circuit receives an adjustment signal to adjust selective impedances. The receiving circuit receives the pair of downstream signals from the central office, and generates the adjustment signal according to downstream and upstream rates and signals from the hybrid matching circuit. The transmission unit adjusts transmission power and bandwidth of the transmission unit and the receiving unit adjusts filter bandwidth of the receiving unit according to the adjustment signal for optimizing upstream and downstream rates.