Abstract: A method for extracting a black-odorous water body based on a CART classification model includes: selecting a research region, designing sampling points within the region; monitoring relevant chemical indicators of the water body at various sampling points, extracting remote sensing reflectance data of the water body, determining a type of the water body according to a classification standard of relevant chemical indicators for an urban black-odorous water body; comparing and analyzing the remote sensing reflectance data to obtain spectral change features of the black-odorous water body and a general water body; constructing each node of a decision tree according to the spectral change features and based on Gini index, constructing a decision tree classification model to obtain classification results of the black-odorous water body and the general water body, calculating a classification accuracy; analyzing the classification results to obtain spatiotemporal distribution changes of black-odorous water bodies

Abstract: A spectral information separation and aggregation method includes: performing smooth denoising on spectral data through a spectral denoising method to obtain processed spectral data; processing the processed spectral data through a spectral data processing method to obtain spectral information with at least two dimensions and thereby spectral information of multi-dimensions are obtained; quantitatively analyzing correlations among spectral information of respective dimensions through a correlation-analysis algorithm, and calculating spectral information coupling coefficients according to the correlations among the spectral information of the respective dimensions; coupling the spectral information of multi-dimensions to thereby obtain resultant spectral information; and calculating a correlation between the resultant spectral information and ground-object parameters through a correlation-analysis algorithm, and evaluating an effect of the coupling.

Abstract: A motor driven pump with a waterproof structure is provided. The pump includes a motor, a pump body, a pump shaft, a shaft seal, and a first blocking member. The motor includes a motor housing. The pump body includes an impeller and a first drainage chamber having a first drainage outlet. The pump shaft includes a first end and a second end located opposite to the first end, wherein the first end is connected to the motor and the second end is connected to the impeller. The shaft seal forms a fluid seal with the pump body to prevent a fluid in the pump body from leaking into the motor. The first blocking member is located between the motor and the shaft seal and is connected in a sealed and a fixed manner to the pump shaft for conjoint rotation. The first blocking member is positioned to block fluid leaking from the shaft seal.

Abstract: A pipeline system of an inflatable SPA is provided. The pipeline system includes an air inlet pipeline; a water inlet pipeline, distributed along a circumferential direction of the inflatable SPA; and a plurality of jets for massage, where each of the plurality of jets includes a first water inlet, a first air inlet and an air-liquid mixing outlet, the first air inlet is connected with the air inlet pipeline, the first water inlet is connected with the water inlet pipeline, and air and water can be mixed in each of the plurality of jets and sprayed from the air-liquid mixing outlet. The water with bubbles can be sprayed into pool cavity surrounded by an inner pool wall of the inflatable SPA, which can play a massage effect on users.

Abstract: A pipeline system of an inflatable SPA is provided. The pipeline system includes an air inlet pipeline; a water inlet pipeline, distributed along a circumferential direction of the inflatable SPA; and a plurality of jets for massage, where each of the plurality of jets includes a first water inlet, a first air inlet and an air-liquid mixing outlet, the first air inlet is connected with the air inlet pipeline, the first water inlet is connected with the water inlet pipeline, and air and water can be mixed in each of the plurality of jets and sprayed from the air-liquid mixing outlet. The water with bubbles can be sprayed into pool cavity surrounded by an inner pool wall of the inflatable SPA, which can play a massage effect on users.

Abstract: A motor rotor for a water pump, a water pump, and a pool circulation system are provided. The motor rotor comprises a hollow rotatable shaft having a first injection-molded part, and a magnet disposed circumferentially around a portion of the first injection-molded part. The first injection-molded part extends through an entire axial length of the magnet. The motor rotor also comprises an impeller integrally formed with the first injection-molded part, the impeller being located at an axial end of the hollow rotatable shaft. The motor rotor further comprises a shaft sleeve having a tubular shape located in the hollow rotatable shaft and extending substantially the entire axial length of the hollow rotatable shaft. The water pump has a simple structure, is easy to assemble, is less prone to generating noise during operation, and has a long service life.

Abstract: A pipeline system of an inflatable SPA is provided. The pipeline system includes an air inlet pipeline; a water inlet pipeline, distributed along a circumferential direction of the inflatable SPA; and a plurality of jets for massage, where each of the plurality of jets includes a first water inlet, a first air inlet and an air-liquid mixing outlet, the first air inlet is connected with the air inlet pipeline, the first water inlet is connected with the water inlet pipeline, and air and water can be mixed in each of the plurality of jets and sprayed from the air-liquid mixing outlet. The water with bubbles can be sprayed into pool cavity surrounded by an inner pool wall of the inflatable SPA, which can play a massage effect on users.

Abstract: A motor driven pump with a waterproof structure is provided. The pump includes a motor, a pump body, a pump shaft, a shaft seal, and a first blocking member. The motor includes a motor housing. The pump body includes an impeller and a first drainage chamber having a first drainage outlet. The pump shaft includes a first end and a second end located opposite to the first end, wherein the first end is connected to the motor and the second end is connected to the impeller. The shaft seal forms a fluid seal with the pump body to prevent a fluid in the pump body from leaking into the motor. The first blocking member is located between the motor and the shaft seal and is connected in a sealed and a fixed manner to the pump shaft for conjoint rotation. The first blocking member is positioned to block fluid leaking from the shaft seal.

Abstract: A pipeline system of an inflatable SPA is provided. The pipeline system includes an air inlet pipeline; a water inlet pipeline, distributed along a circumferential direction of the inflatable SPA; and a plurality of jets for massage, where each of the plurality of jets includes a first water inlet, a first air inlet and an air-liquid mixing outlet, the first air inlet is connected with the air inlet pipeline, the first water inlet is connected with the water inlet pipeline, and air and water can be mixed in each of the plurality of jets and sprayed from the air-liquid mixing outlet. The water with bubbles can be sprayed into pool cavity surrounded by an inner pool wall of the inflatable SPA, which can play a massage effect on users.