Abstract: A battery and an electric apparatus are disclosed. The battery includes a box and a bushing, where the box is provided with a mounting beam, that includes a first beam that is provided with a first mounting hole, and a second beam that is provided with a second mounting hole, the bushing includes a flange portion, a rod portion, and a connecting portion, the flange portion and the connecting portion are respectively connected to two ends of the rod portion, the flange portion protrudes from the rod portion, the rod portion passes through the first mounting hole, the connecting portion passes through the second mounting hole. the flange portion is sealably connected to the first beam and/or the rod portion is sealably connected to a wall of the first mounting hole, and the connecting portion is sealably connected to a wall of the second mounting hole.

Abstract: A composition for preparing a polycaprolactone shape memory material, and a polycaprolactone shape memory material, a preparation method therefor, and a use thereof are provided. The material contains a plurality of modified polyrotaxane macromolecular chains, and a plurality of composite macromolecular chains connected to different modified polyrotaxane macromolecular chains, wherein each of the composite macromolecular chains comprises at least two segments of polycaprolactone macromolecular chains, a reversible linking group between different polycaprolactone macromolecular chains, and a linking modification group for linking cyclodextrin-derived cyclic structures comprised in the polycaprolactone macromolecular chains and the modified polyrotaxane macromolecular chains. The reversible linking group is a photo-reversible linking group or a thermally reversible linking group.

Abstract: A battery and an electric apparatus are disclosed. The battery includes a box and a bushing, where the box is provided with a mounting beam, that includes a first beam that is provided with a first mounting hole, and a second beam that is provided with a second mounting hole, the bushing includes a flange portion, a rod portion, and a connecting portion, the flange portion and the connecting portion are respectively connected to two ends of the rod portion, the flange portion protrudes from the rod portion, the rod portion passes through the first mounting hole, the connecting portion passes through the second mounting hole. the flange portion is sealably connected to the first beam and/or the rod portion is sealably connected to a wall of the first mounting hole, and the connecting portion is sealably connected to a wall of the second mounting hole.

Abstract: A differentiated real-time injection-production optimization adjustment method of an intelligent injection-production linkage device belongs to the field of oil reservoir injection-production technologies.

Abstract: A riveting assembly, a battery, electrical equipment, and an assembling method and equipment of the riveting assembly are described. The riveting assembly includes a first member, a second member and a riveting piece; the first member has a first connecting portion; the second member has a first hollow portion, and the second member has a first wall and a second wall opposed to each other; a rivet body of the riveting piece is configured to sequentially pass through the first wall, the first hollow portion, the second wall and the first connecting portion; in an axial direction of the rivet body, the rivet body has a first weak portion and a first limiting portion which are disposed at intervals, and the first weak portion protrudes in a radial direction of the rivet body when the rivet body is axially stressed to form a second limiting portion.

Abstract: An indication device of an electric switch comprises an indication component (101), a driving component (103) and a positioning component (102). The indication component (101) has at least three indication positions. Each indication position corresponds to one state of the electric switch, and the indication component (101) shows one indication mark at each indication position. The indication device of electric switch uses a single indication component (101) having at least three indication positions, and the third position is provided via deformation of the indication component (101) itself, thus realizing a simple structure and low manufacturing cost.

Abstract: A carrier structure (2) of an arrangement (1) for modifying a main magnetic field generated in a magnetic resonance tomograph from multiple carrier elements (3, 37). A conductor arrangement (4) is respectively arranged on each carrier element (3, 37). The conductor arrangements (4) respectively include a primary conductor arrangement (6) for generating a primary magnetic field that modifies the main magnetic field and a secondary conductor arrangement (7) for shielding the primary magnetic field. A method for producing a modularly constructible arrangement (1) is provided, which can be used for example for spatial encoding.

Abstract: An indication device of an electric switch comprises an indication component (101), a driving component (103) and a positioning component (102). The indication component (101) has at least three indication positions. Each indication position corresponds to one state of the electric switch, and the indication component (101) shows one indication mark at each indication position. The indication device of electric switch uses a single indication component (101) having at least three indication positions, and the third position is provided via deformation of the indication component (101) itself, thus realizing a simple structure and low manufacturing cost.

Abstract: The present invention discloses a protection module for a control and protective switching device, comprising a control power supply processing unit, an auxiliary power supply processing unit, a power supply converting unit, a signal processing and controlling unit, a trip electromagnet driving unit, a control electromagnet driving unit, and a man-machine interaction device. The control power supply processing unit and the auxiliary power supply processing unit receive a power supply signal from a high voltage power supply, and process the signal for supplying power for other components. The signal processing and controlling unit receives a mutual-induction signal from a current mutual inductor, outputs a first control signal and a second control signal to the trip electromagnet driving unit and the control electromagnet driving unit, and receives a first feedback signal and a second feedback signal from an operation mechanism and a control electromagnet.

Abstract: A carrier structure (2) of an arrangement (1) for modifying a main magnetic field generated in a magnetic resonance tomograph from multiple carrier elements (3, 37). A conductor arrangement (4) is respectively arranged on each carrier element (3, 37). The conductor arrangements (4) respectively comprise a primary conductor arrangement (6) for generating a primary magnetic field that modifies the main magnetic field and a secondary conductor arrangement (7) for shielding the primary magnetic field. A method for producing a modularly constructible arrangement (1), which can be used for example for spatial encoding.

Abstract: Disclosed is a control and protection device for a low-voltage electrical apparatus, comprising a pedestal and a control and protection module. The control and protection module may be plugged into the pedestal and is replaceable. The pedestal comprises a base and a housing, and is further provided with a moving contact, a static contact, and a current conductor connected to a main circuit current; a control electromagnet operation mechanism for controlling close and open of the moving contact and the static contact according to a control signal, and maintaining a close or open status of the moving contact and the static contact; a manual operation knob providing a control signal for controlling the close and open of the moving contact and the static contact; a control contact connected to the manual operation knob; and a current sensor for detecting a current that flows through the main circuit current conductor and generating a sensing signal.

Abstract: The present invention discloses a contact structure of a low-voltage electrical apparatus. The contact structure is in a dual-breakpoint form, and comprises: two U-shaped static contacts, the U-shaped static contact enabling the current direction in the static contact to be opposite to the current direction in a movable contact; a contact bridge; two movable contacts, disposed on the contact bridge, and respectively corresponding to the two static contacts; a contact support member, disposed on the movable contacts and connected to the movable contacts; two main contact springs, symmetrically disposed under the movable contacts and forming an angle with the contact bridge; and a spring support member, disposed under the two movable contacts and connected to the two main contact springs.

Abstract: The present invention discloses a protection module for a control and protective switching device, comprising a control power supply processing unit, an auxiliary power supply processing unit, a power supply converting unit, a signal processing and controlling unit, a trip electromagnet driving unit, a control electromagnet driving unit, and a man-machine interaction device. The control power supply processing unit and the auxiliary power supply processing unit receive a power supply signal from a high voltage power supply, and process the signal for supplying power for other components. The signal processing and controlling unit receives a mutual-induction signal from a current mutual inductor, outputs a first control signal and a second control signal to the trip electromagnet driving unit and the control electromagnet driving unit, and receives a first feedback signal and a second feedback signal from an operation mechanism and a control electromagnet.

Abstract: The present invention discloses a contact structure of a low-voltage electrical apparatus. The contact structure is in a dual-breakpoint form, and comprises: two U-shaped static contacts, the U-shaped static contact enabling the current direction in the static contact to be opposite to the current direction in a movable contact; a contact bridge; two movable contacts, disposed on the contact bridge, and respectively corresponding to the two static contacts; a contact support member, disposed on the movable contacts and connected to the movable contacts; two main contact springs, symmetrically disposed under the movable contacts and forming an angle with the contact bridge; and a spring support member, disposed under the two movable contacts and connected to the two main contact springs.

Abstract: Disclosed is a control and protection device for a low-voltage electrical apparatus, comprising a pedestal and a control and protection module. The control and protection module may be plugged into the pedestal and is replaceable. The pedestal comprises a base and a housing, and is further provided with a moving contact, a static contact, and a current conductor connected to a main circuit current; a control electromagnet operation mechanism for controlling close and open of the moving contact and the static contact according to a control signal, and maintaining a close or open status of the moving contact and the static contact; a manual operation knob providing a control signal for controlling the close and open of the moving contact and the static contact; a control contact connected to the manual operation knob; and a current sensor for detecting a current that flows through the main circuit current conductor and generating a sensing signal.

Abstract: A method for designing an electromagnetic gradient coil for magnetic resonance imaging systems. The method includes the steps of: choosing a set of objectives Li, whereby the objectives Li are combined to one weighted-sum objective function; choosing a design variable ? for modifying the value of the objectives L; making an initial guess of the value of the design variable ?; simulating the magnetic field in a computational domain with respect to the distribution of the surface current density; carrying out a sensitivity analysis by calculating a sensitivity vector G=?L/??; updating the design variable ?, whereby the value of the design variable ? is changed in order to decrease the value of the objective L; determining whether convergency is achieved by either determining whether the value of the objective function does not decrease or the whether the Euclidian norm of the sensitivity vector G approximate to zero; and reconstruction of a discretized coil.

Abstract: A method for designing an electromagnetic gradient coil for magnetic resonance imaging systems. The method includes the steps of: choosing a set of objectives Li, whereby the objectives Li are combined to one weighted-sum objective function; choosing a design variable ? for modifying the value of the objectives L; making an initial guess of the value of the design variable ?; simulating the magnetic field in a computational domain with respect to the distribution of the surface current density; carrying out a sensitivity analysis by calculating a sensitivity vector G=?L/??; updating the design variable ?, whereby the value of the design variable ? is changed in order to decrease the value of the objective L; determining whether convergency is achieved by either determining whether the value of the objective function does not decrease or the whether the Euclidian norm of the sensitivity vector G approximate to zero; and reconstruction of a discretized coil.