Abstract: The present invention provides a plastic connector for bonding two or more air cleaners, comprising a connector body and a fastener. The connector body has guide rails and frame legs; and the fastener has openings and fastener arms. The openings of the fastener are in snap-fit with the guide rails of the connector body, so that the connector body and the fastener form the plastic connector, and the fastener can slide along the guide rails as force applies. The present invention also provides an air cleaner system with air cleaners in parallel connection using the plastic connectors. The plastic connector of the present invention does not require tool for installation, is low in costs, and saves labor and time. Also, such plastic connector reduces installation stress of air cleaners in parallel connection, which facilitates durability of the air cleaners.

Abstract: A generation system and method for a high-precision three-dimensional navigation map of a fully mechanized mining surface, applicable to use in the technical field of unmanned mining. The generation system comprises a channel wave seismometer, a laser radar, a combined navigation device, a ground penetrating radar, and a data processing unit; the data processing unit acquires data collected by sensors; perform coordinate conversion, feature fusion and consistency processing on the collected data to generate a Delaunay triangle network of a coal seam, a fault/fold, and a roadway; draw a high-precision profile map of the triangle map, calculate a topological relation of the profile map, generate a topological data structure of the profile map, establish a navigation information automatic query database platform based on the high-precision profile map, and construct the high-precision three-dimensional navigation map of the fully mechanized mining surface.

Abstract: An in-place data recovery method and system include receiving a user request to restore a virtual machine to a version corresponding to a first point in time, identifying a first snapshot of the virtual machine based on the user request, generating a second snapshot of the virtual machine, identifying a second data block in the second snapshot that includes modified data derived from data content of a first data block in the first snapshot, generating reverse incremental backup data including the first data block, and restoring the virtual machine in-place based on the reverse incremental backup data.

Abstract: A cooling system performance early warning method based on dictionary learning is disclosed. A sensor and an oil pump frequency converter are arranged on a cooler of the cooling system to measure operation data of the cooling system. A PLC controller is installed on the cooler to collect the measured operation data and connected with a cloud server, and the cloud server first performs offline dictionary learning on the data, so as to establish a performance cads warning model for each group of coolers respectively. After the offline dictionary learning stage is completed, an online early warning stage is entered, and the established performance early warning model is used to carry out a real-time performance early warning of the cooling system. The early warning method can use the established performance early warning model to carry out real-time performance early warning, which has the advantages of real-time, realizability and strong pertinence.

Abstract: An operating method of an aerial vehicle may comprise obtaining target parameters, the target parameters being acquired by an on-board sensor of the aerial vehicle during movement of the aerial vehicle, the target parameters comprising a distance between the aerial vehicle and a target object and an extension direction of the target object; determining a flight path of the aerial vehicle based on the target parameters; and controlling the aerial vehicle to perform an operation based on the flight path of the aerial vehicle.

Abstract: An image guided radiotherapy apparatus and a control method are provided. According to a specific embodiment, the radiotherapy apparatus includes: a treatment unit, which includes a treatment head for generating radiation beam for radiotherapy; an imaging unit for imaging a target area of a patient, wherein the imaging unit is integrated mounted with the treatment head. The radiotherapy apparatus of the present invention can be applicable to both extracorporeal and intraoperative radiotherapy, and has a high radiotherapy accuracy.

Abstract: A device and method can be used for clinical virus inactivation treatment to automatically, continuously and cyclically treat plasma of a patient in a closed system. The disclosed plasma treatment device may be used for an anti-viral agent such as, for example, methylene blue photochemical plasma virus inactivation. The plasma treatment device can perform real-time treatment to the plasma in the closed system on the basis of the principle of plasma exchange and can realize real-time back-transfusion during treatment.

Abstract: An unmanned aerial vehicle (UAV) includes a radar configured to perform ranging on a ground during rotation and a terrain prediction device communicatively connected to the radar. The terrain prediction device includes a memory storing a computer program and a processor configured to execute the computer program to acquire N pieces of ranging data each being obtained by the radar when a rotation angle of the radar is within a preset angle interval, and determining a terrain parameter of the ground according to the N pieces of ranging data. N is an integer greater than 1. The terrain parameter includes at least one of a gradient or a flatness.

Abstract: System and methods for an event defined and user controlled interaction channel are disclosed. The interaction channel can be added to people, locations, things, or media content for associated activity and information interactions between interested parties to achieve a goal or outcome. The disclosed system may include mobile, web, and cloud applications or services supporting enablement of an interaction channel for attachment and/or interconnection with traditional or social media sources, communication services, or other referenced objects to facilitate added layers of host-defined and user controlled interactions. The methods may include an event definition process for an event host to easily and quickly attach an interaction channel to a referenced object for user controlled interactions.