Abstract: The present invention discloses a CEEMDAN-based method for screening and monitoring soil moisture stress in farmland, characterised by the steps: preprocessing of remote sensing images, construction of NDVI long time series, CEEMDAN decomposition, calculation of statistical descriptors, screening of soil moisture stress sequences, ground data measurement, construction of soil moisture stress characteristic curves, fitting of soil moisture stress response characteristic curves and predicting the content of soil moisture stress. The invention adopts CEEMDAN decomposition, which solves the problems of noise residue and low reconstruction accuracy in the previous methods, and the high reconstruction accuracy of decomposed component data is more conducive to capturing the transient effects of soil moisture stress, and realizes the screening and extraction of soil moisture stress by combining with the ground measured data.

Abstract: A method for ecologic configuration of an oil production wastewater artificial wetland to realize up-to-standard operation in winter. When artificial wetland is utilized to treat oil production high-salt wastewater, ecologic configuration of subsurface and surface flow artificial wetland is modified to realize up-to-standard operation in winter. Subsurface flow artificial wetland is composed of soil matrix, water distribution pipe disposed on bottom of soil matrix, wrapped with water-permeable nonwoven cloth and configured to deliver wastewater, and reeds with root systems growing on an inner side of wall of water distribution pipe, stems growing on outer side of wall of water distribution pipe and length being greater than thickness of soil matrix; and surface flow artificial wetland is composed of soil matrix, reeds growing on matrix, water, winter aquatic salt-resistant cold-liking plants, block-stocked fishes, shrimps, crabs, mussels, Mytilus edulis, oysters or clams and artificial sand dam.

Abstract: A method for ecologic configuration of an oil production wastewater artificial wetland to realize up-to-standard operation in winter. When artificial wetland is utilized to treat oil production high-salt wastewater, ecologic configuration of subsurface and surface flow artificial wetland is modified to realize up-to-standard operation in winter. Subsurface flow artificial wetland is composed of soil matrix, water distribution pipe disposed on bottom of soil matrix, wrapped with water-permeable nonwoven cloth and configured to deliver wastewater, and reeds with root systems growing on an inner side of wall of water distribution pipe, stems growing on outer side of wall of water distribution pipe and length being greater than thickness of soil matrix; and surface flow artificial wetland is composed of soil matrix, reeds growing on matrix, water, winter aquatic salt-resistant cold-liking plants, block-stocked fishes, shrimps, crabs, mussels, Mytilus edulis, oysters or clams and artificial sand dam.

Abstract: Provided is a system for semi-automatic membrane-assisted compression molding process in combination with an actuator and the method of using the same. The system comprises: a lower mold (2) having a dismountable molding component on which a fiber reinforcement (1) can be placed; an upper mold (3) comprising one or more dismountable actuators (7), the end of each of the actuators being independently provided with a local molding component, the shape of the local molding component being suitable for applying a local pressure to a local region of a composite material to be manufactured; a flexible membrane (4) provided between the molding component and the local molding component and hermetically connected to the upper mold (3), and a pressurizing device being capable of applying an overall pressure to the fiber reinforcement (1) by means of the flexible membrane (4); and an injection unit introducing a curable material into the fiber reinforcement (1).