Abstract: A method for sentiment analysis includes that: a feature sequence corresponding to text is obtained, the feature sequence includes encoded features; each encoded feature in the feature sequence is processed by using an attention mechanism, to obtain an attention feature of the text; the attention feature is transferred to a spatial transform feature of the text; an entity attribute of the spatial transform feature is recognized, and sentiment mapping is performed based on the spatial transform feature to obtain a sentiment polarity of the entity attribute.

Abstract: Provided is a display apparatus. The display apparatus includes: a liquid crystal display panel and a backlight module, wherein a first sealed air cavity is formed inside the liquid crystal display panel, and the backlight module is located on one side of the liquid crystal display panel and forms a second sealed air cavity with the liquid crystal display panel; and a sound production board and a sound production exciter, wherein the sound production board is fixed onto the surface of the backlight module away from the liquid crystal display panel, a vibration output terminal of the sound production exciter is fixed onto the surface of the sound production board away from the backlight module, and the sound production exciter is used for exciting, by means of the vibration output terminal, the sound production board to vibrate, so as to drive the backlight module to vibrate.

Abstract: A display apparatus includes a liquid crystal display panel and a backlight module, a first sealed air cavity formed inside the liquid crystal display panel, and the backlight module being located on one side of the liquid crystal display panel and forming a second sealed air cavity with the liquid crystal display panel; and a sound-emitting board and a sound-emitting exciter, the sound producing board being fixed to the surface of the backlight module far away from the liquid crystal display panel, and a vibration output terminal of the sound-emitting exciter being fixed to the surface of the sound-emitting board far away from the backlight module.

Abstract: A method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction includes electrochemically reducing sulfur dioxide absorbed in an aqueous solution into gaseous hydrogen sulfide with a membrane electrode, resulting in efficient and selective conversion of the sulfur dioxide absorbed in the aqueous solution into the hydrogen sulfide to avoid a deactivation of a cathode due to colloidal sulfur produced on the cathode and adhesion onto a surface of the cathode, wherein the method is carried out at ambient temperature and normal pressure without addition of a reducing agent, having no waste salts produced, and is simple in operation, and is convenient for large-scale application.

Abstract: A display apparatus is disclosed in the embodiments of the present disclosure. The display apparatus includes a display structure, a sound emitting substrate, and a plurality of electromagnetic exciters; wherein the display structure is configured to receive and display optical signals; the sound emitting substrate is attached to the display structure and is divided into a plurality of regions by a plurality of isolation zones, at least some of the plurality of regions are attached to at least one of the plurality of electromagnetic exciters; and the plurality of electromagnetic exciters are configured to generate bending waves at an area where the plurality of electromagnetic exciters are attached to the sound emitting substrate.

Abstract: A subway hybrid-energy multifunctional-end-integrated heat pump system includes energy and user ends and hot water tank. A first energy end includes a capillary-tube front-end heat exchanger and a subway capillary heat pump unit. A second energy end includes a solar panel. A third energy end includes an air-cooled heat pump unit. The user end includes air conditioner, hot water supply, underfloor heating, and radiator heating ends. The first, second and third energy ends connect to the hot water tank. A water outlet is connected to the air conditioner, hot water supply, underfloor heating, and radiator heating ends. Water outlets of the air conditioner, underfloor heating, and radiator heating ends are respectively connected to the first, second and third energy end through a return pipe.

Abstract: A display apparatus includes: a display; an input interface; and a processor in connection with the display and the input interface and configured to: upon detecting access of a first power amplifier device, output a high-level Hotplug signal at a Hotplug port of the display apparatus; monitor whether a common-mode data packet from the first power amplifier device is received within a first preset duration; in response to the common-mode data packet being received within the first preset duration, send a heartbeat packet to the first power amplifier device, and monitor whether a heartbeat response is received within a second preset duration; in response to the heartbeat response being received within the second preset duration, determine that the first power amplifier device supports e-ARC function; and in response to the heartbeat response being not received within the second preset duration, determine that the first power amplifier device supports ARC function.

Abstract: A display apparatus is provided in the present disclosure. The display apparatus includes: a screen, including a display area and a non-display area; a backplane, in connection with the screen; and an exciter, in connection with the backplane and is configured to drive the screen to vibrate and output sound via the backplane.

Abstract: A high-bandwidth bend-insensitive multimode fiber includes a core laver and a cladding including an inner cladding, a depressed cladding, and an outer cladding arranged sequentially from inside to outside. The core layer is a silicon dioxide glass layer co-doped with germanium, phosphorus (P), and fluorine (F) and has a refractive index profile in a shape of a parabola, a distribution index in a range of 2.0-2.3, a radius in a range of 23-27 ?m, and a maximum relative refractive index difference in a range of 0.9-1.2% at its center. A contribution amount of P at the center is in a range of 0.01-0.30%. A doping amount of F increases from the center to the edge of the core layer. A contribution amount of F at the center and edge of the core layer is in range of 0.0% to ?0.1%, and ?0.40% to ?0.20%, respectively.

Abstract: The disclosure relates to the field of spray welding, and involves a method and a device for liquid spray welding, as well as the application method thereof. The method for liquid spray welding specifically comprises the following steps: S1: Solder to be spray-soldered is melted under the protection of an inert gas; S2: Then, the melted solder is spray-soldered while using ultrasonic focusing. The device includes a solder conversion mechanism which consists of a container; the cavity in the container is used for placing the solder; a spraying hole is arranged at the bottom of the container to connect with the cavity, and a heating mechanism is mounted along the outer wall of the container; a device for driving the solder spraying is used to control the frequency of an ultrasonic generating mechanism.

Abstract: The disclosure relates to the field of spray welding, and involves a method and a device for liquid spray welding, as well as the application method thereof. The method for liquid spray welding specifically comprises the following steps: S1: Solder to be spray-soldered is melted under the protection of an inert gas; S2: Then, the melted solder is spray-soldered while using ultrasonic focusing. The device includes a solder conversion mechanism which consists of a container; the cavity in the container is used for placing the solder; a spraying hole is arranged at the bottom of the container to connect with the cavity, and a heating mechanism is mounted along the outer wall of the container; a device for driving the solder spraying is used to control the frequency of an ultrasonic generating mechanism.

Abstract: A display apparatus includes: a display; an input interface; and a processor in connection with the display and the input interface and configured to: upon detecting access of a first power amplifier device, output a high-level Hotplug signal at a Hotplug port of the display apparatus; monitor whether a common-mode data packet from the first power amplifier device is received within a first preset duration; in response to the common-mode data packet being received within the first preset duration, send a heartbeat packet to the first power amplifier device, and monitor whether a heartbeat response is received within a second preset duration; in response to the heartbeat response being received within the second preset duration, determine that the first power amplifier device supports e-ARC function; and in response to the heartbeat response being not received within the second preset duration, determine that the first power amplifier device supports ARC function.

Abstract: A geotagged video spatial indexing method for video retrieval based on a two-dimensional (2D) temporal grid is disclosed and includes: generating the 2D temporal grid by using the earliest start time, the latest end time of all geotagged video clips and a temporal resolution; calculating row and column number information of each geotagged video clip based on its start time and end time; generating a spatial point for each geotagged video clip based on the row and column number information and obtaining a spatial point set; generating a R-tree spatial index structure corresponding to the spatial point set using a R-tree spatial index method; and locating the corresponding cell in a temporal grid based on retrieval conditions, generating a spatial point based on row and column number information of the grid cell, and finding the spatial point in the R-tree spatial index structure to get the geotagged video corresponding thereto.

Abstract: Disclosed is a specimen retrieval bag, which includes an introducing tab arranged at an opening end of the bag body; and a bag extending tab arranged on a closed end of the bag body; the introducing tab and the bag extending tab are configured to cooperate with an insertion rod, and the insertion rod is configured to pass through the bag extending tab to insert a top end of the insertion rod into the introducing tab. The beneficial effects of the present application are as follows: the diameter of the insertion rod may be effectively reduced, through using the specimen retrieval bag together with the insertion rod matching with the specimen retrieval bag, and a trocar cannula used in conjunction with the insertion rod is also reduced, thereby achieving an effect of minimally invasive in the true sense.

Abstract: A geotagged video spatial indexing method for video retrieval based on a two-dimensional (2D) temporal grid is disclosed and includes: generating the 2D temporal grid by using the earliest start time, the latest end time of all geotagged video clips and a temporal resolution; calculating row and column number information of each geotagged video clip based on its start time and end time; generating a spatial point for each geotagged video clip based on the row and column number information and obtaining a spatial point set; generating a R-tree spatial index structure corresponding to the spatial point set using a R-tree spatial index method; and locating the corresponding cell in a temporal grid based on retrieval conditions, generating a spatial point based on row and column number information of the grid cell, and finding the spatial point in the R-tree spatial index structure to get the geotagged video corresponding thereto.

Abstract: Embodiments of the present disclosure provide a display apparatus and an electromagnetic actuator, the display apparatus includes a display structure, a sound-emitting substrate, at least one electromagnetic actuator and a stabilizer; where one side of the sound-emitting substrate is attached to the display structure, and the electromagnetic actuator is fixedly attached to the other side of the sound-emitting substrate through the stabilizer; the electromagnetic actuator includes a bracket and a plurality of flexible support feet extending away from the bracket. The electromagnetic actuator is fixedly arranged on the sound-emitting substrate through the stabilizer, and the bracket receives the electromagnetic actuator, the plurality of flexible support feet can keep the electromagnetic actuator stable during the vibration process of the electromagnetic actuator, which helps avoid position shift of the electromagnetic actuator under long-time working.

Abstract: A display apparatus is disclosed in the embodiments of the present disclosure. The display apparatus includes a display structure, a sound emitting substrate, and a plurality of electromagnetic exciters; wherein the display structure is configured to receive and display optical signals; the sound emitting substrate is attached to the display structure and is divided into a plurality of regions by a plurality of isolation zones, at least some of the plurality of regions are attached to at least one of the plurality of electromagnetic exciters; and the plurality of electromagnetic exciters are configured to generate bending waves at an area where the plurality of electromagnetic exciters are attached to the sound emitting substrate.

Abstract: A method for preparing hydrogen sulfide from sulfur dioxide by electrochemical reduction includes electrochemically reducing sulfur dioxide absorbed in an aqueous solution into gaseous hydrogen sulfide with a membrane electrode, resulting in efficient and selective conversion of the sulfur dioxide absorbed in the aqueous solution into the hydrogen sulfide to avoid a deactivation of a cathode due to colloidal sulfur produced on the cathode and adhesion onto a surface of the cathode, wherein the method is carried out at ambient temperature and normal pressure without addition of a reducing agent, having no waste salts produced, and is simple in operation, and is convenient for large-scale application.

Abstract: A subway hybrid-energy multifunctional-end-integrated heat pump system includes energy and user ends and hot water tank. A first energy end includes a capillary-tube front-end heat exchanger and a subway capillary heat pump unit. A second energy end includes a solar panel. A third energy end includes an air-cooled heat pump unit. The user end includes air conditioner, hot water supply, underfloor heating, and radiator heating ends. The first, second and third energy ends connect to the hot water tank. A water outlet is connected to the air conditioner, hot water supply, underfloor heating, and radiator heating ends. Water outlets of the air conditioner, underfloor heating, and radiator heating ends are respectively connected to the first, second and third energy end through a return pipe.