Comba Telecom System (china) Ltd

Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences

Bin He

Tao He

Mengmeng Shu

Jingmin Huang

Yingjie Di

Yu Ma

Qixiu Li

A method disclosed includes following steps: gridding on a research area to obtain grid units; performing a numerical processing on fertilization influence features to obtain fertilization influence numerical features of each grid unit; acquiring time information of the fertilization manual in the research area; calculating the fertilization influence numerical features of each grid unit by using weights of the fertilization influence features, acquiring nitrogen fertilizer application amounts of each grid unit in different time periods; performing a data processing on a first geographic information system to obtain a second geographic information system; and using the second geographic information system to estimate a nitrogen fertilizer application amount in the research area. A system disclosed includes a gridding unit, a digitizing unit, an acquisition unit, a calculation unit, a data processing unit and a nitrogen fertilizer estimation unit. a computer equipment disclosed includes a processor and a memory for storing executable programs.

Method, system, computer equipment and medium for estimating nitrogen application amount in distributive regions

Disclosed are an energy self-sufficient high-efficiency photothermal evaporative nano-particle porous membrane and application thereof, including: dissolving polymer A in solvent B to obtain solution A; dripping solution A into solvent C to obtain a polymer A nano hydrogel dispersion; evenly mixing polymer A nano hydrogel dispersion and nano particle dispersion of photothermal conversion material D to obtain a co-blended dispersion; performing suction-filtering to the co-blended dispersion on a surface of a solvent-resistant membrane E to form an A-D co-blended membrane; and performing suction-filtering to a solvent F using the A-D co-blended membrane, followed by drying to obtain a high-efficiency photothermal evaporative nano-particle porous membrane.

Energy self-sufficient high-efficiency photo-thermal evaporative nano-particle porous membrane, preparation method and application thereof

World map wall clock

The invention discloses a DCS/WCDMA dual frequency multiplexer. On one hand, the multiplexer utilizes distributed parameter type capacitors in place of conventionally used capacitors. On the other hand, within the multiplexer, a direct circuit and a RF circuit are isolated from each other physically. All components including capacitors co-exist together physically. Similarly, the invention further discloses a dual frequency multiplexer with large application range. It also utilizes the distributed parameter type capacitors like the DCS/WCDMA dual frequency multiplexer. Because the invention has redesigned the entire construction of the multiplexer, it results good effects such as small size, less differential loss, large power capacity, as well as high isolation degree between circuits.

DCS/WCDMA dual frequency synthesizer and a general dual frequency synthesizer

The invention discloses a dual frequency multiplexer by which a first and second coaxial harmonic oscillator type band pass filters are disposed in a box. The box includes a base body, a cover plate and a cover body. The two coaxial harmonic oscillator type hand pass filters are located on the base body and spaced each other by a metal plate; the multiplexer port, first and second ports are positioned on lateral side of the base body. The blocking capacitors are contained in the coaxial chamber of the two coaxial harmonic oscillator type band pass filters. The cover plate is secured on the base body; the first and second direct current circuits are placed on the cover plate; the low pass filters of the first and second direct current circuits are fixed on an edge of a top surface of the coaxial chamber by means of a support member; the cover body and the base body are fastened with each other. The blocking capacitors each are of distributed parameter capacitor. Utilization of distributed blocking capacitors makes the product of the invention small. Moreover, improvement of the structure of the invention brings effect such as less differential loss, large power capacity, as well as high isolation degree between circuits.

Dual-frequency multiplexer

An ultra wideband dual-frequency combiner includes a combination port (Port), a first port (Port), a second port (Port), two coaxial resonator band pass filters and two direct current channels. The first direct current channel is connected between the first port (Port) and the combination port (Port). The second direct current channel is connected between the second port (Port) and the combination port (Port). One end of the first coaxial resonator hand pass filters () is electrically connected with the first port (Port) via a first blocking capacitor. One end of the second coaxial resonator hand pass filter () is electrically connected with the second port (Port) via a second blocking capacitor. The other ends of the first coaxial resonator band pass filter and the second coaxial resonator band pass filter are connected with the combination port (Port) via a third blocking capacitor. The blocking capacitors are parameter distributed capacitors.

Growing community of inventors

Guangzhou, China

Bin He