Abstract: A safe early warning method and device for full-section tunneling of a tunnel featuring dynamic water and weak surrounding rock, comprising establishing a dynamic coordinate system with an origin thereof moving along a tunnel excavation line, recording the moving distance of the origin, conducting three-dimensional laser scanning with the origin as a center to obtain point cloud data including coordinate data, collecting surrounding rock data; conducting deformation fitting on the point cloud data, calculating a fitting residual error, removing a noisy point, and conducting preprocessing; combining data of preprocessed point cloud, surrounding rock, and the tunnel excavation line to construct a tunnel excavation dynamic model; conducting stress analysis according to the model and determining whether to send out a safety early warning signal.

Abstract: A safe early warning method and device for full-section tunneling of a tunnel featuring dynamic water and weak surrounding rock, comprising establishing a dynamic coordinate system with an origin thereof moving along a tunnel excavation line, recording the moving distance of the origin, conducting three-dimensional laser scanning with the origin as a center to obtain point cloud data including coordinate data, collecting surrounding rock data; conducting deformation fitting on the point cloud data, calculating a fitting residual error, removing a noisy point, and conducting preprocessing; combining data of preprocessed point cloud, surrounding rock, and the tunnel excavation line to construct a tunnel excavation dynamic model; conducting stress analysis according to the model and determining whether to send out a safety early warning signal.

Abstract: Luo han guo juice and a preparation method thereof. The method comprises: preparing fresh luo han guo fruits, and washing and grinding the same; adding a macerating enzyme; and performing enzymolysis under an ultra-high pressure of 120-220 MPa and maintaining the pressure for 10-15 minutes.

Abstract: The application provides a method for preparing rubusoside comprising steps of raw material crushing, flash extraction, double centrifugations, macroporous resin purification, desorption, enzymatic hydrolysis, organic film decoloring, concentration, crystallization and drying. The application optimizes the quality control of key process such as extraction, separation, purification and decolorization, and can obtain the rubusoside product with purity more than 99%, and the product is white, no bitterness, less solvent residue, no pesticide residue, and stable quality.

Abstract: The application provides a method for preparing betanin comprising steps of raw material crushing, flash extraction, double centrifugations, macroporous resin purification, desorption, enzymatic hydrolysis, organic film decoloring, concentration, crystallization and drying. The application optimizes the quality control of key process such as extraction, separation, purification and decolorization, and can obtain the betanin product with purity more than 99%, and the product is white, no bitterness, less solvent residue, no pesticide residue, and stable quality.

Abstract: The invention relates to a method for separating and purifying mogroside V by subcritical water desorption technology. The macroporous adsorption resin enriched with mogroside V is subjected to desorption under a subcritical condition of water using water as a solvent, to give an aqueous solution rich in mogroside V. The method not only improves the content of mogroside V in product, but also effectively removes bitter impurities and residual pesticides, greatly improves the taste adaptability of the product, and improves the safety and quality of the product. The method reduces the processing steps and reduces the use of organic solvents in the prior art, and reduces total production costs.

Abstract: The present invention relates to a method for increasing the content of mogroside V in Siraitia grosvenorii suspended cells. In the method, 10-200 mg/L of a yeast inducer and 50-260 mg/L of methyl jasmonate are respectively added on days 5 to 11 of the culture cycle of Siraitia grosvenorii suspended cells, thereby increasing the synthesis rate and yield of mogroside V, and also reducing the amount of mogroside II secreted. The method is beneficial for the market-oriented and large-scale production and quality control management of mogroside V.

Abstract: The invention relates to a method for separating and purifying mogroside V by subcritical water desorption technology. The macroporous adsorption resin enriched with mogroside V is subjected to desorption under a subcritical condition of water using water as a solvent, to give an aqueous solution rich in mogroside V. The method not only improves the content of mogroside V in product, but also effectively removes bitter impurities and residual pesticides, greatly improves the taste adaptability of the product, and improves the safety and quality of the product. The method reduces the processing steps and reduces the use of organic solvents in the prior art, and reduces total production costs.