Abstract: An intelligent oil extraction system using an all-metal screw pump includes: the all-metal screw pump, an oil collecting unit (43), and a steam generating unit (45); wherein an internal threaded curve surface and an external threaded curve surface of the all-metal screw pump are both tapered spiral structures with equal tapers; the oil extraction system comprises a lifting mechanism and monitoring and control mechanism; the monitoring and control mechanism comprises: a controller (34), a torque sensor (35), a flow sensor (36), a pressure sensor (39), a liquid level detector (38), and a backup power source (37); the controller (34) is electrically connected to the torque sensor (35), the flow sensor (36), the pressure sensor (39), the liquid level detector (38), the backup power source (37), a drive motor (48), a servo motor (33), a first valve and a second valve.

Abstract: The present disclosure relates to a solar battery including a first cell, and a second cell, and a first charge transport layer, a transparent conductive layer, a second charge transport layer and a polysilicon layer are disposed between the first photoelectric conversion layer of the first cell and the second photoelectric conversion layer of the second cell, and the second charge transport layer is disposed between the polysilicon layer and the transparent conductive layer, and the charge transport property of the second charge transport layer is the same as that of the polysilicon layer. In the solar battery of the present disclosure, a first charge transport layer, a transparent conductive layer, a second charge transport layer and a polysilicon layer are sequentially arranged between the first photoelectric conversion layer and the second photoelectric conversion layer.

Abstract: The present disclosure provides a solar cell including a substrate, a first emitter, a second emitter, an insulating spacing structure, a first electrode, and a second electrode. The substrate includes a front surface and a back surface opposite to each other. The first emitter and the second emitter are disposed on the back surface of the substrate. The first electrode is disposed on a side of the first emitter away from the substrate, and the first electrode is electrically connected to the first emitter. The second electrode is disposed on a side of the second emitter away from the substrate, and the second electrode is electrically connected to the second emitter. The insulating spacing structure is disposed between the first emitter and the second emitter, and the first emitter and the second emitter are spaced from each other by the insulating spacing structure.

Abstract: A method for recognizing polluted seawater areas based on high-resolution remote sensing images includes performing automatic sea and land classification on a remote sensing image by using a supervised learning algorithm. The classification result reaches a higher precision level by processized iterative clustering compared to conventional methods. The method further includes combining a chlorophyll-associated normalized difference vegetation index, a brightness-associated normalized difference water shadow index, a segmentation-based image interpretation thought and a human visual saliency-based mechanism in remote sensing interpretation by virtue of a chlorophyll concentration difference of a seawater polluted area and surrounding seawater and a brightness difference of pollutant shadows. The seawater polluted area is extracted by threshold segmentation. An area where the water quality is good and a heavily polluted area are extracted. A pollution transition area is further extracted.

Abstract: A laminated passivation structure of solar cell and a preparation method thereof are disclosed herein. The laminated passivation structure of solar cell includes a P-type silicon substrate, a first dielectric layer, a second dielectric layer, a third dielectric layer and a fourth dielectric layer sequentially arranged on the back surface of the P-type silicon substrate from inside to outside. The preparation method includes generating a first dielectric layer on the back surface of the P-type silicon substrate, and then sequentially depositing a second dielectric layer, a third dielectric layer and a fourth dielectric layer on the first dielectric layer.

Abstract: A solar cell and preparation method thereof. The solar cell includes a silicon substrate having first or second polarity, where the substrate includes first and second sides opposite to each other; a first passivation structure on first side of the substrate, where a portion of first structure farthest from the substrate has first polarity and a position where first structure is located is first electrode region; a second passivation structure on a side of first structure away from the substrate and in at least second electrode region, where a portion of second structure farthest from the substrate has second polarity and second structure has a process temperature lower than first structure; and a first electrode in first electrode region on a side of second structure away from the substrate, and a second electrode in second electrode region on a side of second structure away from the substrate.

Abstract: A solar cell and preparation method. The solar cell includes silicon substrate having first or second polarity, where the substrate includes first and second sides opposite to each other; first passivation structure on first side of the substrate, a portion of first structure farthest from the substrate having first polarity and a position where first structure is located being first electrode region; second passivation structure on a side of first structure away from the substrate, a portion of second structure farthest from the substrate having second polarity and a position where second structure is located being second electrode region, second and first electrode regions are not overlapped and second structure has a process temperature lower than first structure; and first electrode in first region on a side of second structure away from the substrate and second electrode in second region on a side of second structure away from the substrate.

Abstract: A laminated passivation structure of solar cell and a preparation method thereof are disclosed herein. The laminated passivation structure of solar cell includes a P-type silicon substrate, a first dielectric layer, a second dielectric layer, and a third dielectric layer sequentially arranged on the back side of the P-type silicon substrate from inside to outside. The preparation method includes generating a first dielectric layer on the back surface of the P-type silicon substrate, and then sequentially depositing a second dielectric layer and a third dielectric layer on the first dielectric layer.

Abstract: The present invention discloses a method for recognizing a seawater polluted area based on a high-resolution remote sensing image and a device and belongs to the field of digital image processing.

Abstract: A server receives an association request initiated by a user of a first account. Based on the association request, an account identifier of a second account is identified. The first account is associated with the second account based on the account identifier. In response to associating the first account with the second account, a partial permission is granted to the first account for accessing the second account.

Abstract: A server receives an association request initiated by a user of a first account. Based on the association request, an account identifier of a second account is identified. The first account is associated with the second account based on the account identifier. In response to associating the first account with the second account, a partial permission is granted to the first account for accessing the second account.

Abstract: A server receives an association request initiated by a user of a first account. Based on the association request, an account identifier of a second account is identified. The first account is associated with the second account based on the account identifier. In response to associating the first account with the second account, a partial permission is granted to the first account for accessing the second account.

Abstract: A server receives an association request initiated by a user of a first account. Based on the association request, an account identifier of a second account is identified. The first account is associated with the second account based on the account identifier. In response to associating the first account with the second account, a partial permission is granted to the first account for accessing the second account.