A system that may be used for energy harvesting includes a flexible beam secured between a first support and a second support. The supports are spaced apart at a distance less than a length of the flexible beam such that the beam is buckled. Responsive to external vibrations the flexible beam switches between a first position and a second position. A magnetic proof mass is coupled to the flexible beam at the beam's midpoint. At least one permanent magnet is positioned proximate to the magnetic proof mass and has the same polarity. The permanent magnet is positioned to expose the magnetic proof mass to a repulsive force when the magnetic proof mass is located at both the first position and the second position. Piezoelectric transducers are located above and below the first and second positions of the flexible beam to harvest energy.

An apparatus for mitigating the forces of friction. The apparatus includes a hollow hub having a void therein and rotationally mounted on a support, and a plurality of hollow spokes coupled to and extending from the hub, each spoke of the plurality of spokes having a void therein, the voids being in communication with each other. A magnetically sensitive substance is disposed within the void of the spokes and the void of the hub. A circular rim surrounds the spokes such that the distal end of each spoke is disposed proximate the rim without contacting the rim. A magnet is disposed on the rim in sufficient proximity and strength to exert a force on the magnetically sensitive substance within a spoke when the distal end of the spoke is proximate the magnet. As the hub rotates, the magnetically sensitive substance moves within the void of the spoke due to gravity.

The present disclosure discloses a charging indication method. The method includes: acquiring a current ratio of a remaining battery capacity to a total battery capacity; determining a target curvature angle of a flexible display screen associated with a terminal based at least on the current ratio; and controlling the flexible display screen to present the target curvature angle.

A molecular mixing system. In one embodiment, the molecular mixing system includes a motorized turntable; a speed controller to control the rotational speed of the motorized turntable; a plurality of magnets arranged in a first Halbach array, the first Halbach array located on the motorized turntable and concentric to the axis of the motorized turntable; and a sample conduit having an input port and an output port and having an outer wall defining a lumen, the sample conduit positioned within and concentric with the first Halbach array.

A mount bush includes a tubular member, a shaft member disposed inside the tubular member coaxially with an axis of the tubular member and including a coil, a permanent magnet provided on at least one of the tubular member and the shaft member, a magnetic viscoelastic fluid filled in an internal space, a first liquid chamber disposed in the internal space at a first side, a second liquid chamber communicating with the first liquid chamber, and a third liquid chamber communicating with the second liquid chamber, wherein the coil is disposed such that a magnetic path passing through the second liquid chamber in an orientation along at least one of the axial direction and the radial direction perpendicular to the axial direction is formed through electrical conduction, and the permanent magnet is disposed such that a magnetizing direction is formed along the magnetic path.

A circuit interrupter system includes a vacuum circuit interrupter having a vacuum chamber that contains a fixed contact and a moveable contact. A non-conductive rod extends from the moveable contact. One or more Thomson coils are wound around the rod, and one or more armatures are connected to the rod. When a driver energizes one of the Thomson coils, a corresponding armature will be repelled from that Thomson coil and move the rod to open or close the contacts of the vacuum circuit interrupter. The system also may include a damper that provides an active damping force rod when the rod is moved to open and/or close the vacuum circuit interrupter.

A circuit interrupter system includes a vacuum circuit interrupter having a vacuum chamber that contains a fixed contact and a moveable contact. A non-conductive rod extends from the moveable contact. One or more Thomson coils are wound around the rod, and one or more armatures are connected to the rod. When a driver energizes one of the Thomson coils, a corresponding armature will be repelled from that Thomson coil and move the rod to open or close the contacts of the vacuum circuit interrupter. The system also may include a damper that provides an active damping force rod when the rod is moved to open and/or close the vacuum circuit interrupter.

A movement device comprising a first and a second assembly, the first assembly being composed of a plurality of subassemblies. Two directly adjacent subassemblies are conterminous with each other at a boundary line. The two subassemblies form at least one first pair of directly adjacent first permanent-magnet arrangements that are separated from each other by the boundary line. The two first permanent-magnet arrangements of the first pair are each arranged with a boundary distance from the boundary line that is reduced with respect to a spacing distance, such that they mutually have the spacing distance. There are present in each case within the said two subassemblies at least one second pair of directly adjacent first permanent-magnet arrangements that mutually have the spacing distance.

Generally, a system for generating a magnetic field having a desired magnetic field strength and/or a desired magnetic field direction is provided. The system can include a plurality of magnetic segments and/or a plurality of ferromagnetic segments. Each magnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. Each ferromagnetic segment can be positioned adjacent to at least one of the plurality of magnetic segments. In various embodiments, a size, shape, positioning and/or number of magnetic segments and/or ferromagnetic segments in the system, as well as a magnetization direction of the magnetic segments can be predetermined based on, for example, predetermined parameters of the system (e.g., a desired magnetic field strength, direction and/or uniformity of the magnetic field, a desired elimination of a magnetic fringe field and/or total weight of the system) and/or based on a desired application of the system (e.g., performing a magnetic resonance imaging of at least a portion of a patient and/or performing a magnetic resonance spectroscopy of a sample).

The present disclosure relates to a magnetic assembly structure which utilizes a magnetic attraction or repulsion effect generated by two magnetic components to make two buckle structures automatically engaged to each other. The magnetic assembly structure of the present disclosure has a first main body and a second main body, and via the hardware design of disposing magnetic components and buckle structures respectively on the first main body and the second main body, the first and second main bodies rotate in respect to each other due to the magnetic attraction or repulsion effect, so as to efficiently engage the two buckle structures each other. Thus, it actually eases the installation and uninstallation of the appliance to which the magnetic assembly structure is applied, and the costs of installation and consuming time are reduced.