A heat exchange unit (1) includes a heat exchange housing (3) and two heat exchange arrangements (4) located within the heat exchange housing (3). Each heat exchange arrangement (4) includes an outer (5a) and an inner (5b) air-to-air plate heat exchanger, which are connected in series. The heat exchange unit also relates to a totally enclosed electrical machine system with air to air cooling and a method for cooling the electrical machine system.

An assistance apparatus according to the disclosure generates monitor area data on the basis of dimension data of rack rows that are each constituted by a plurality of racks and that are arranged in a first direction in a three-dimensional space, the dimension data including the length of each rack row in the first direction and the height thereof in a second direction perpendicular to the first direction, interval data that includes an interval, in a third direction, between the rack rows adjacent to each other in the third direction, the third direction being perpendicular to the first and second directions, field-of-view angle data that includes the field-of-view angle of each temperature sensor, and temperature sensor position data that indicates certain temperature sensor positions; and includes a display control unit that displays monitor coverage information on a display device on the basis of the monitor area data.

Provided are a communication system and a communication apparatus thereof, the communication apparatus includes: a bottom case and a printed circuit board mounted on the bottom case, the communication apparatus further includes a heat-conductive mounting strip, the printed circuit board being mounted on the bottom case by means of the heat-conductive mounting strip, wherein a lower end surface of the heat-conductive mounting strip is connected to the bottom case, and an upper end surface of the heat-conductive mounting strip is connected to the printed circuit board.

Exemplary embodiments provide a hybrid buffer pool for a database that includes a plurality of data pages contained in storage. The hybrid buffer pool comprises: a shared buffer pool of page frames containing dirty data pages that are modified after reading that will be written back to storage; an immutable buffer pool that temporarily contains read-only data pages from the storage; and a page multiplexer that identifies which ones of the data pages from storage to store in the immutable buffer pool based at least in part on information from a query processor.

A telecommunication cabinet includes a cabinet body, a cabinet door module, and a detachable hinge. The cabinet body includes a cabinet and a telecommunication module disposed in the cabinet. The cabinet door module includes a cabinet door and a function module. The detachable hinge includes a first shaft seat, a second shaft seat and a pivot shaft. The cabinet door module is pivotally rotatable with respect to the cabinet through the pivot shaft inserted to the first shaft seat and the second shaft seat. The cabinet door module is detachably coupled to the cabinet body to facilitate replacement.

A heat sink comprises a first portion and a second portion. The first portion is configured to contact a heat-generating electronic component. The first portion is formed from a first group of materials and has a first plurality of fins. The second portion is coupled to the first portion. The second portion is formed from a second group of materials and has a second plurality of fins. The second group of materials is different than the first group of materials. The first group of materials can include extruded aluminum, stamped aluminum, or both. The second group of materials can include die-cast metal. The first plurality of fins can have a smaller fin pitch than the second plurality of fins. The heat sink can further comprise a third portion coupled to the first portion, such that the first portion is positioned between the second portion and the third portion.

An electric device includes an electric component mounted on a circuit board, a cabinet, a heat conducting member, and an elastic portion. The cabinet faces the circuit board. The heat conducting member has heat conductivity, a first contact portion that is in contact with the electric component, and at least one second contact portion that is in contact with the cabinet. The elastic portion has elasticity in a direction in which the circuit board and the cabinet face each other. The first contact portion and the second contact portion are separated from each other in the direction in which the circuit board and the cabinet face each other. The elastic portion applies an elastic force to at least one of the first contact portion and the second contact portion in a direction in which the first contact portion and the second contact portion are separated from each other.

A telecommunication cabinet includes a cabinet body, a cabinet door module, and a detachable hinge. The cabinet body includes a cabinet and a telecommunication module disposed in the cabinet. The cabinet door module includes a cabinet door and a function module. The detachable hinge includes a first shaft seat, a second shaft seat and a pivot shaft. The cabinet door module is pivotally rotatable with respect to the cabinet through the pivot shaft inserted to the first shaft seat and the second shaft seat. The cabinet door module is detachably coupled to the cabinet body to facilitate replacement.

An electric device includes an electric component mounted on a circuit board, a cabinet, a heat conducting member, and an elastic portion. The cabinet faces the circuit board. The heat conducting member has heat conductivity, a first contact portion that is in contact with the electric component, and at least one second contact portion that is in contact with the cabinet. The elastic portion has elasticity in a direction in which the circuit board and the cabinet face each other. The first contact portion and the second contact portion are separated from each other in the direction in which the circuit board and the cabinet face each other. The elastic portion applies an elastic force to at least one of the first contact portion and the second contact portion in a direction in which the first contact portion and the second contact portion are separated from each other.

A contacting plate is for creating an electrical connection to at least one component. The at least one component has a housing back, which is opposite the contacting plate. A method is for creating a contacting plate and the specification of options for electrical contacting between a component and contacting plate. An electrical contact and a mechanical fastening are formed between the contacting plate and the housing back of the at least one component.