Abstract: A blackboard eraser cleaning device is provided and includes an outer shell (1). A cover (2) is arranged at the upper part of the outer shell (1), an inner shell (3) is arranged inside the outer shell (1). A clamping mechanism (19) is arranged at the upper end of the inner shell (3). A leaning station (8) is defined inside the clamping mechanism (19). A cylinder (9) is arranged around the clamping mechanism (19). A height adjustment mechanism (10) is arranged inside the outer shell (1). The height adjustment mechanism (10) includes a servo (101) arranged inside the outer shell (1) and located on a side of the inner shell (3). According to the present application, a variety of cleaning modes may be achieved to meet the actual usage of the blackboard eraser.

Abstract: A display panel and a display device are provided. The display panel includes a display region and a non-display region. The non-display region includes a demultiplexing circuit, a fanout wire, and a clock signal line. An input terminal of the demultiplexing circuit is electrically connected to the fanout wire, an output terminal of the demultiplexing circuit is electrically connected to a data line in the display region, and a control terminal of the demultiplexing circuit is electrically connected to the clock signal line. The display panel further includes an isolation signal line including an isolation portion, and an orthographic projection of the isolation portion on a plane where a substrate is located is between an orthographic projection of the clock signal line on the plane where the substrate is located and an orthographic projection of the fanout wire on the plane where the substrate is located.

Abstract: A dielectric barrier discharging tube, which has a synergistic column of needle electrodes to utilize a plurality of channels to adsorb catalysts, is provided. The dielectric barrier discharging tube includes: a quartz tube, a high-voltage pole, an inner electrode, and a plurality discharging needle sets. Two catalytic blocks are arranged respectively on two sides of each set discharging needles. Each catalytic block defines at least one inclined inner channel and at least one inclined outer channel. A higher end of each channel faces towards the discharging needle, and a lower end of each channel faces towards the discharging needle.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for content presentation are provided. The method comprises presenting, in a first display region of a content presentation page of an application, a first set of contents provided by a first user in a first size. The method further comprises presenting a second set of contents provided by at least one second user in a second display region of the content presentation page different from the first display region in a second size different from the first size. The first user and the second user are associated users in the application. In this way, the content provided by the first user can be presented at the same time as the content provided by the associated user associated with the first user, so as to provide more rich and interesting content presentation.

Abstract: A blackboard eraser cleaning device is provided and includes an outer shell (1). A cover (2) is arranged at the upper part of the outer shell (1), an inner shell (3) is arranged inside the outer shell (1). A clamping mechanism (19) is arranged at the upper end of the inner shell (3). A leaning station (8) is defined inside the clamping mechanism (19). A cylinder (9) is arranged around the clamping mechanism (19). A height adjustment mechanism (10) is arranged inside the outer shell (1). The height adjustment mechanism (10) includes a servo (101) arranged inside the outer shell (1) and located on a side of the inner shell (3). According to the present application, a variety of cleaning modes may be achieved to meet the actual usage of the blackboard eraser.

Abstract: A method for a crawl algorithm includes obtaining a plurality of web pages for a web crawler to crawl. The method also includes determining an available bandwidth for the web crawler. The method includes, for each respective web page of the plurality of web pages, determining a respective crawl value for the respective web page based on the available bandwidth and determining that the respective crawl value of the respective web page satisfies a threshold value. The method includes, in response to determining that the respective crawl value of the respective web page satisfies the threshold value, updating the respective web page in a cache memory.

Abstract: Disclosed are a method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source, belonging to the field of biological treatment of sludge of high ammonia nitrogen wastewater.

Abstract: A structure of a two-dimensional material-based device having an air-gap and a method for preparing same comprises a substrate, a gate, an dielectric, a two-dimensional material-based film, and source and drain electrodes; the air-gap is formed between the two-dimensional material-based film and the side wall of the dielectric on the gate, or the air-gap is formed between the dielectric and the gate; two-dimensional material-based devices of the above structure utilize the ductility and flexibility of two-dimensional materials to reduce the coupling between the gate and the source/drain electrodes, thereby reducing the parasitic capacitance and the circuit delay; also, the structure ensures that a part of the contact region of the source and drain electrodes with the two-dimensional material can be controlled by the gate, and can thus avoid the reduction in electrical properties and keep a low resistance of the device.

Abstract: Techniques for machine learning inferencing endpoint discovery in a distributed computing system are discloses herein. In one example, a method includes searching a database containing machine learning endpoint records having data representing values of execution latency or prediction accuracy corresponding inferencing endpoints deployed in the distributed computing system. The method also includes generating a list of inferencing endpoints matching the individual target values and determining whether a count of the inferencing endpoints in the generated list exceeds a preset threshold. In response to determining that the identified count does not exceed the preset threshold, the method includes instantiating one or more additional inferencing endpoints in the distributed computing system based on the individual target values in the received query.

Abstract: A key-value store and a file system are integrated together to provide improved operations. The key-value store can include a log engine, a hash engine, a sorting engine, and a garbage collection manager. The features of the key-value store can be configured to reduce the number of I/O operations involving the file system, thereby improving read efficiency, reducing write latency, and reducing write amplification issues inherent in the combined key-value store and file system.

Abstract: The present disclosure provides a soft ground cleaning vehicle, including a main body frame; wherein each of both sides of the main body frame is arranged with a screw propulsion mechanism, and a lower portion of each of the both sides of the main body frame is arranged with a bottom frame; a power assembly is arranged on the bottom frame, and an extension frame is arranged on a lower portion of the bottom frame; the extension frame is arranged with a rotation assembly; a plastic track is arranged on the power assembly and the rotation assembly; a plurality of stand plates are arranged on an outer strip surface of the plastic track.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises presenting a first shooting page in an asynchronous shooting mode. The first shooting page includes a first shooting window for presenting a first scene captured by a first camera of a terminal device. The method further comprises in response to the first camera completing shooting of a first image, presenting a second shooting page comprising a second shooting window and a first image window. The second shooting window presents a second scene captured by a second camera different from the first camera. The first image window presents the first image. The method further comprises capturing a second image by the second camera while the second shooting page being presented. In this way, flexible and interesting image shooting experience is provided.

Abstract: According to embodiments of the present disclosure, there is provided a method, apparatus, device and storage medium for content presentation. The method comprises based on a first user input received in a graphical user interface, the first user input indicating to present a first content associated with a second user to a first user in the graphical user interface, determining whether the first user has provided the second content. The method further comprises in accordance with a determination that the first user does not provide the second content, presenting a blurred image associated with the first content to the first user in the graphical user interface. In this way, a more flexible content sharing application or content presentation application can be provided.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.

Abstract: According to embodiments of the present disclosure, a method, apparatus, device and storage medium for image shooting are provided. The method comprises initiating a first camera and a second camera different from the first camera for image shooting. The method further comprises presenting a shooting page in a graphical user interface displayed by a display device. The shooting page comprises a first shooting window for presenting a first scene captured by the first camera and a second shooting window for presenting a second scene captured by the second camera. The method further comprises presenting a composite image on the shooting page in the graphical user interface in response to an indication of shooting completion. The composite image is generated based on a first image taken by the first camera and a second image taken by the second camera. In this way, flexible and interesting image shooting experience is provided.

Abstract: Embodiments of the present disclosure relate to a video playing method and apparatus, a device, and a storage medium. The method includes: displaying a plurality of videos in a form of rows and columns in a first page, a column direction being consistent with a slide direction supported by the page; determining a first target video reaching a corresponding predetermined control line of predetermined control lines among videos in a to-be-played row in response to a trigger operation, the predetermined control lines being in correspondence with the columns in the first page, the predetermined control lines being arranged at intervals along the column direction; and stopping playing of a second target video that is being played in the first page, and playing the first target video in the first page.

Abstract: According to embodiments of the present disclosure, a method, apparatuses, device and storage medium for video recommendation are provided. The method comprises: selecting at least one candidate video to be recommended from one or more videos of a predetermined type posted in an application, the one or more videos of the predetermined type are accessible within a predetermined period of time; presenting respective images corresponding to the at least one candidate video using a widget associated with the application, and, in response to a selection of one of the presented images, presenting the candidate video corresponding to the selected image as a recommended video. By use of the widget, a user can be presented, in time, with the prompt of the content posted by other users with high social affinity in the application. The user can quickly browse the content by clicking the widget prompt without entering the application.

Abstract: According to embodiments of the present disclosure, there is provided a method, apparatus, apparatus, and storage medium for reposting. In a method of reposting, a repost prompt for reposting a post is presented to the first user in response to determining that a predetermined repost condition is satisfied. The predetermined repost condition includes at least one of the following: the post has been previously reposted by the second user and the first and second users have an association; the number of times that the first user completely views the post exceeds a first threshold number; a positive evaluation of the post provided by the first user. The method further comprises causing the post to be reposted in response to a request by the first user. In this way, it is possible to provide an easy, efficient and flexible mechanism of reposting, which simplifies user operation and improves user experience.

Abstract: According to embodiments of the present disclosure, there are provided method, apparatuses, devices and storage media for reposting a post. In a method for presenting a post, a request for presenting a comment area for the post is received from a first user, and the comment area is then presented, where if the post is reposted, the comment area includes at least one repost comment related to reposting of the post. In this way, it is possible to support convenient and quick access to repost comments, which simplifies user operations and improves user experience.

Abstract: Disclosed is a carbon dioxide heat pump evaporator, comprising side evaporators having defrosting water flow channels formed thereon, an evaporator tray which is arranged at the bottoms of the side evaporators and is used for supporting the side evaporators, and a defrosting drainage system, wherein the defrosting drainage system comprises a plurality of defrosting electric heating tubes inserted into the side evaporators, water receiving gutters which are connected to the defrosting water flow channels, gutter electric heating mechanisms for heating the water receiving gutters, and drainage pipes which are connected to the water receiving gutters and are provided with conduit electric heating tracing bands; and the evaporator tray, the water receiving gutters and the drainage pipes are sequentially arranged from top to bottom.