摘要:
A series type air supply system for fuel cell-powered vehicles wherein a low speed air supplier and a high speed air supplier are connected in a series for performance of a multi-staged pressurization to variably operate the air suppliers of high efficiency according to an output value of a fuel cell stack and to improve the work efficiency of a fuel cell system under all driving modes of fuel cell-powered vehicles. Air is pressurized by a 2-staged compression of the low and high speed air suppliers under an accelerated driving mode to reduce the work load of compression and to increase the overall efficiency of the fuel cell system.
摘要:
Disclosed is a transmitter optical module which includes a first package generating an optical signal; a second package bonded with the first package by using chip-to-chip bonding, having a silicon optical circuit platform structure, and amplifying the optical signal; and an optical waveguide forming a transmission path of the optical signal from the first package to the second package.
摘要:
A system for managing resources in a communication system including systems which do not have a permission for a first frequency band includes a coexistence manager configured to, when a frequency band available for the systems is searched from the first frequency band, manage the systems for coexistence and frequency sharing of the systems in the available frequency band; a coexistence enabler configured to transmit and receive information of the systems and information of the coexistence manager; and a coexistence discovery and information server configured to support control of the coexistence manager over the systems, wherein a plurality of coexistence managers are provided to respectively correspond to the plurality of systems, and wherein, among the plurality of coexistence managers, a first coexistence manager performs a negotiation procedure with coexistence managers neighboring to it, on the basis of one of an etiquette mode, a round-robin mode and a competition mode.
摘要:
A system for managing resources in a communication system including systems, which do not have a permission for a first frequency band, includes coexistence managers configured to, when a frequency band available for the systems is searched from the first frequency band, manage the systems for coexistence and frequency sharing of the systems in the available frequency band; a coexistence enabler configured to transmit and receive information of the systems and information of the coexistence managers; and a coexistence discovery and information server configured to support control of the coexistence managers over the systems, wherein predetermined messages are transmitted and received among the coexistence discovery and information server, the coexistence managers and the coexistence enabler to perform a registration procedure, a coexistence information gathering procedure, a coexistence decision making procedure, a reconfiguration procedure, a management procedure and an event procedure, for the coexistence and frequency sharing of the systems.
摘要:
The present disclosure provides a method of forming an electrical device. The method may begin with forming a gate structure on a substrate, in which a spacer is present in direct contact with a sidewall of the gate structure. A source region and a drain region is formed in the substrate. A metal semiconductor alloy is formed on the gate structure, an outer sidewall of the spacer and one of the source region and the drain region. An interlevel dielectric layer is formed over the metal semiconductor alloy. A via is formed through the interlevel dielectric stopping on the metal semiconductor alloy. An interconnect is formed to the metal semiconductor alloy in the via. The present disclosure also includes the structure produced by the method described above.
摘要:
The present invention relates to an inverter and a lamp driver having the same. The inverter includes a first switch having a first body diode, a second switch having a second body diode, a transformer including a first side coil in which a first current and a first voltage are generated according to switching operations of the first switch and the second switch and a second side coil having a predetermined winding ratio with respect to the first side coil, and a controller for controlling each switching operation of the first switch and the second switch. The controller turns on one of the first switch and the second switch corresponding to one of the first body diode and the second body diode, and a current flows through the first switch and the second switch during a dead time.
摘要:
A reformer for a fuel cell system includes a reforming portion for converting fuel containing hydrogen into hydrogen-rich gas; and an adiabatic portion entirely covering the reforming portion, the adiabatic portion being composed of first and second adiabatic layers arranged opposing each other with at least one spacer interposed between the first and second adiabatic layers. As such, the fuel cell system has an effect of enhancing the adiabatic performance of a thermal reaction for producing reforming gas and distributing thermal residence stress uniformly on the surface of the reformer.
摘要:
Provided is an upstream source light generator of a passive optical network (PON) system. The upstream source light generator includes an amplification part configured to amplify injection light, and a reflection part configured to receive the amplified injection light and generate reflection light by reflecting the amplified injection light with different optical delays according to wavelengths of the amplified injection light.
摘要:
The present invention relates to an inverter and a lamp driver having the same. The inverter includes a first switch having a first body diode, a second switch having a second body diode, a transformer including a first side coil in which a first current and a first voltage are generated according to switching operations of the first switch and the second switch and a second side coil having a predetermined winding ratio with respect to the first side coil, and a controller for controlling each switching operation of the first switch and the second switch. The controller turns on one of the first switch and the second switch corresponding to one of the first body diode and the second body diode, and a current flows through the first switch and the second switch during a dead time.
摘要:
A fuel cell system includes a stack having an electricity generator for receiving fuel and air to generate electrical energy, a fuel supply unit for supplying the fuel to the stack, a housing in which the stack is mounted, a fan unit for supplying external air to the interior of the housing for cooling the electricity generator, and a region wherein air heated while cooling the electricity generator and air discharged from the stack and containing moisture are mixed. The air that is mixed in the region is discharged from the region.