Abstract: A method for positioning a mobile robot in an environment, in which a plurality of RFID tags are arranged, includes receiving one or more RF signals from at least one RFID tag among the plurality of RFID tags via a RFID reader arranged on the mobile robot; estimating a first position of the robot in the environment based on the received one or more RF signals; obtaining inertial data from an inertial measurement unit (IMU) arranged on the robot; estimating a second position of the robot based the inertial data; and determining a calibrated position of the robot based on the first position and the second position.

Abstract: Provided is a fitness bike. The fitness bike includes a frame, a toggle member and a drive assembly. One end of the toggle member is movably connected to a handlebar of the frame, and the toggle member is capable of being toggled by a hand gripping on the handlebar. The drive assembly is disposed on a body of the frame and includes a load motor, a transmission mechanism and pedals, where a motor shaft of the load motor is drivingly connected to the pedals via the transmission mechanism. In the fitness bike, the load motor is used for providing resistance to simulate resistance received in a riding process, thereby eliminating a traditional flywheel structure, improving safety, lightening a weight and reducing a volume.

Abstract: The present application relates to a BIM-based hanging basket design method, computer device and computer-readable storage medium, wherein the design method comprises following steps: a parameter acquisition step; a hanging basket modularization step: decomposing structures of hanging baskets into a plurality of design modules; a selection step; a calculation step: calculating parameters of the design modules using a structural mechanics calculation method and/or a finite element calculation method; preliminary BIM model building step: building models of the design modules and a preliminary BIM model of the hanging basket; an optimization iteration step: converting the preliminary BIM model of the hanging basket into a finite element model for calculation, and feeding calculation results back to the preliminary BIM model for structural adjustment, repeatedly performing iterative calculations to obtain optimized hanging basket parameter data; final BIM model acquisition step: the BIM model of the hanging baske

Abstract: The provided is a data-driven bipartite consensus control method for multi-robot collaborative rotation of a large workpiece. The method includes: setting a multi-robot system; constructing and discretizing a dynamics model of a follower robot, and constructing a lateral error based on position information between the follower and leader robots; constructing an unknown nonlinear function with the lateral error and a control input as variables, and constructing a lateral error data model of the follower robot through a dynamic linearization technique; designing, based on a topological relationship of the multi-robot system and the lateral error, a bipartite consensus error; substituting the data model into a designed objective function to solve a data-driven bipartite consensus controller; designing a parameter estimation algorithm to estimate an unknown parameter in the controller; allowing an estimated value to participate in a controller update; and calculating a front wheel steering angle control signal.

Abstract: The provided is a data-driven bipartite consensus control method for multi-robot collaborative rotation of a large workpiece. The method includes: setting a multi-robot system; constructing and discretizing a dynamics model of a follower robot, and constructing a lateral error based on position information between the follower and leader robots; constructing an unknown nonlinear function with the lateral error and a control input as variables, and constructing a lateral error data model of the follower robot through a dynamic linearization technique; designing, based on a topological relationship of the multi-robot system and the lateral error, a bipartite consensus error; substituting the data model into a designed objective function to solve a data-driven bipartite consensus controller; designing a parameter estimation algorithm to estimate an unknown parameter in the controller; allowing an estimated value to participate in a controller update; and calculating a front wheel steering angle control signal.

Abstract: Nearly all existing direct current (DC) chemical vapor sensing methodologies are based on charge transfer between sensor and adsorbed molecules. However, the high binding energy at the charge-trapped sites, which is critical for high sensitivity, significantly slows sensors' response and makes the detection of non-polar molecules difficult. By exploiting the incomplete screening effect of graphene, this disclosure demonstrates a DC graphene electronic sensor for rapid (sub-second) and sensitive (ppb) detection of a broad range of vapor analytes, including polar, non-polar, organic and inorganic molecules. Molecular adsorption induced capacitance change in the graphene transistor is revealed to be the main sensing mechanism. This work provides an avenue for a broad spectrum real-time gas sensing technology and serves as an ideal testbed for probing molecular physisorption on graphene.

Abstract: Provided herein is a masterbatch including a grafted silicone polyether and a porous inorganic nanoparticle, bacteria repellant polymer composites including the same, and methods of preparation thereof.

Abstract: A detector unit, a detector array, a detector array motherboard, a detector, and a LiDAR. The detector unit includes: a photosensitive pixel including multiple photosensitive devices; and a microlens array located on a side of the photosensitive pixel, a light is incident on the side, and the microlens array includes multiple microlenses having a one-to-one relationship with the multiple photosensitive devices; a microlens of the multiple microlenses includes a protrusion, and a material of the protrusion is an inorganic material. An encapsulation material can contact with a surface of the microlens without retaining an air gap between the encapsulation material and the microlens, which can improve the reliability of the device effectively, and reduce the encapsulation difficulty. Particularly, for a vehicle device, reducing formation of the air gap is advantageous for passing vehicle regulation certification.

Abstract: A method for preparing a bacteria repellant masterbatch, bacteria repellant polymer composites comprising the same, and compositions and articles prepared therefrom.

Abstract: Bacteria repellant polymer composite having a reduced yellowness index prepared by melt processing a base polymer an epoxy resin and a bacteria repellant agent and methods of preparation thereof.

Abstract: A sealing integrity evaluation device for high-temperature and high-pressure casing-cement ring-formation and a method thereof are provided. the device includes: a high-temperature autoclave, a temperature and pressure control system, and a casing-cement-formation combination; wherein the autoclave realizes alternating temperature and pressure during the experiment; the control system monitors, controls and records the temperature and pressure data; the combination simulates a full size or a compact size casing-cement-formation of a well.

Abstract: The present disclosure provides an experimental device for simulating the erosion of a tubing string caused by sand production. The experimental device includes an autoclave, a circulating assembly, a power assembly, a monitoring assembly, or a three-phase feeding assembly. The circulating assembly is sealed and arranged in the autoclave, the circulating assembly includes a circulation loop formed by straight pipes and elbows. The power assembly includes a pump arranged on the circulation loop. The monitoring assembly includes a flowmeter and a temperature and pressure sensor for detecting the circulation loop, and the temperature and pressure sensor is communicatively connected with a PC. The three-phase feeding assembly includes a feeding pipe that is in fluid communication with the circulation loop, and the feeding pipe is connected with one or more gas tanks, a sander feeder, and one or more liquid tanks, respectively.