Chinese Academy of Sciences

Pengfei Shen

Gang Li

Yu Zhang

Yi Wang

Lu Lu

Xiaosen Li

Zhaoyang Chen

Congmin Lv

Yanmei Jia

Jianwu Liu

Pengwu Han

The present invention discloses a satellite communication method and system based on network coding and modulated-retro reflection. The method includes: constructing a satellite communication network based on modulated-retro reflection, and constructing, based on the satellite communication network, a plurality of preset basic structures for satellite communication in a preset network coding mode; performing structural splitting on the satellite communication network based on the plurality of preset basic structures to obtain at least one splitting mode including at least one basic satellite network structure, and acquiring, based on the preset network coding mode, a total transmission duration of satellite data transmission for all the preset basic structures in each first splitting mode; and determining a first splitting mode corresponding to a total transmission duration meeting a preset condition as a target splitting mode, and performing satellite data transmission by each preset basic structure corresponding to the target splitting mode.

Satellite communication method and system based on network coding and modulated-retro reflection

A modulated retro reflector-based satellite network communication system and method are provided. The system includes: a data acquisition layer configured to acquire data to be acquired, perform integrated analysis on the data to be acquired and send an integrated analysis result to a backbone network layer; the backbone network layer configured to receive a control instruction sent by a ground station, schedule first satellites based on the control instruction, and send the integrated analysis result to the ground station; and the ground station configured to generate the control instruction, send the control instruction to the backbone network layer, detect the first satellites and the second satellites, and receive the integrated analysis result. Through the system, the SWaP value of the satellite may be greatly reduced, thereby being suitable for communication networking of micro-satellites.

Modulated retro reflector-based satellite network communication system and method

An exploiting method and device of marine facies natural gas hydrate. The exploiting method comprises the following steps: (1) after the construction of a vertical well, a fixed pipe is constructed, the exploiting well is set in the center of the fixed pipe, and the mixture is filled between the inner wall of the fixed pipe and the outer wall of the exploiting well; (2) the self-excited oscillating jet nozzle enters the exploiting well along the vertical well to the designated position through an orifice on the exploiting well and sprays the mixture, so that the mixture is broken evenly to form artificial fractures; (3) under the corresponding temperature, the hydrate decomposes to produce gas by depressurized exploiting; (4) the gas-liquid mixture exploited by the exploiting well is separated into liquid and gas in the gas-liquid separation device to collect liquid and gas.

Method and device for exploiting natural gas hydrate from marine rock

An in-situ hydraulic jet exploiting device and method of a low-permeability natural gas hydrate reservoir. The device includes a high-pressure reaction kettle configured for formation, fracturing and exploiting of a hydrate, a stable-pressure gas supply module configured to adjust and control a gas flow rate, a constant-speed constant-pressure liquid supply module configured to control a liquid flow rate or keep liquid injection pressure constant, a thermostatic water bath configured to provide a constant-temperature environment for a device system, a back-pressure module configured to automatically control an exploiting rate or exploiting pressure, an in-situ hydraulic jet permeability enhancement module, a data collection and processing module configured to collect and process basic system parameters, and a pipeline connecting various components.

In-situ hydraulic jet exploiting device and method of low-permeability natural gas hydrate reservoir

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Guangzhou, China

Pengfei Shen