Abstract:
Provided is a nanofluid injection device for removing heat from nuclear power plants. According to the present invention, the nanofluid injection device for removing heat from nuclear power plants is to inject nanofluid into a reactor cavity for cooling the core catcher and outer wall of a reactor vessel, when cooling water in a fuel shuffling tank is injected into the reactor cavity when a serious accident of meltdown occurs. The present invention comprises: a reactor vessel installed inside of a containment building and containing nuclear fuel inside; a reactor cavity installed outside of the reactor vessel and containing the reactor vessel inside; one or more nanofluid storage tanks connected with the reactor cavity by a first pipe and storing nanofluid to provide nanofluid to the reactor cavity; and a nitrogen nanofluid storage tank, connected to the nanofluid storage tank by a second pipe, and storing nanofluid while charged with nitrogen gas having certain amount of pressure, for providing the stored nanofluid to the nanofluid storage tank.
Abstract:
본 발명은 다수의 주파수 부채널들을 사용하여 데이터를 전송하는 직교 주파수 분할 다중 이동통신시스템에서, 다중 송신 안테나들을 구비하는 기지국이 다중 수신 안테나를 구비하는 이동 단말들에게 상기 다중 송신 안테나들로부터 다중 수신 안테나들로의 공간 채널을 할당하기 위해, 상기 다수의 주파수 부채널들 각각에 다수의 공간 채널들을 대응시키고, 상기 이동 단말들 중 최대 통신 용량을 갖는 이동단말을 선택하고, 상기 선택된 이동 단말에 상기 다수의 공간 채널들 중 하나를 할당하는 제1과정을 수행하고, 상기 이동 단말들이 순차적으로 모두 선택될 때까지 상기 제1과정을 반복 수행함으로써 상기 다수의 공간 채널들을 상기 이동 단말들에 할당하고, 상기 다수의 공간 채널들이 할당된 이동 단말들 중 하나를 최대 통신 용량을 갖는 다른 이동 단말로 대체하는 제2과정을 수행하고, 상기 이동 단말들 중에서 상기 대체된 이동 단말을 제외한 나머지 이동 단말들에 대하여 통신 용량이 증가하지 않을 때까지 상기 제2과정을 반복 수행한다. OFDM, MIMO, SDM, 부채널, 공간 채널 할당, 파일럿 행렬, 통신 용량
Abstract:
A micro type band stop filter is provided to improve a skirt property by improving a frequency stop property and a frequency pass property. A spiral resonator(10b) includes a dielectric substrate(13b), a first metal substrate(11b), and a second metal substrate(15b). The first metal substrate is laminated on one surface of the dielectric substrate into a spiral shape. The second metal substrate is laminated on the other surface of the dielectric substrate. A power source is formed on a parallel surface about the first metal substrate, is formed into a vertical direction of the first metal substrate, and forms an electric field which is changed according to a time. An input transmission line is connected to one side of the spiral resonator. A frequency is inputted in the input transmission line. An output transmission line is connected to the other side of the spiral resonator. A frequency is outputted in the output transmission line through the spiral resonator.
Abstract:
A wide band RFID tag antenna is provided to adjust input resistance characteristics by adjusting a distance between a feed part and a radiation patch. A wide band RFID tag antenna(1) includes a radiation patch(10), a short circuit pin(11), a ground layer(20), a feed part(30), and a dielectric body(50). The feed part includes short circuit pins(31,33), a tag chip(35), and a pad(39). The radiation patch has a certain thickness of a rectangular shape and a planar inverted-F antenna. The radiation patch uses the planar inverted-F antenna resonated at 1/4 wavelength to reduce the size of a microstrip patch. The radiation patch includes a plurality of short circuit pins arranged in a width direction thereof.
Abstract:
A method and an apparatus for receiving data in a communication system are provided to prevent deterioration of the system by detecting data by tracking an RLS(Recursive Least Square) algorithm channel and performing a sphere-decoding. An apparatus for receiving data in a communication system includes a plurality of feedforward filters(211,213,215), a plurality of decoders(221,223,225), a pair of feedback filters(231,233), a pair of adders(241,243), and a coupler(250). The feedforward filters(211,213,215) cancel interference signals included in each component of inputted signals. The feedforward filters(211,213,215) and the feedback filters(231,233) perform an RLS algorithm. The decoders(221,223,225) decode signals inputted in a sphere-decoding method. The couplers(250) decide the weight of the feedforward filters(211,213,215) and the feedback filters(231,233).
Abstract:
본 발명은 전체 사용자의 전송 속도를 최대화하는 RA 문제에서 고정된 전송 속도로 서비스 받고자 하는 일부 사용자가 존재하는 변형된 RA 문제를 위한 두 종류의 사용자가 존재하는 OFDMA 시스템에서 최대 전송속도를 위한 적응변조 기법에 관한 것이다. 이를 위해 본 발명에서는 기존의 한가지 사용자가 존재하는 시스템에서 선형 프로그램밍(LP; Linear Programming)을 사용한 적응변조 기법의 도입으로 전체 사용자를 고려하여 하번에 적응 변조를 수행하도록 하는 방법을 제안한다. 또한 고정 전송속도가 충분히 작은 값일 때 복잡성을 줄이기 위해 사용자에 따라 연속적으로 부채널을 할당하는 부최적 방법을 제안한다.
Abstract:
PURPOSE: A system for improving the efficiency of a supercritical brayton cycle through the movement of a critical point using gas mixture is provided to improve the efficiency of a thermodynamic cycle by changing the operation temperature and pressure of the thermodynamic cycle. CONSTITUTION: A system for improving the efficiency of a supercritical brayton cycle through the movement of a critical point using gas mixture is composed as follows. A closed circuit is formed by connecting a heating source(1), a generation turbine(2), a heat regenerator(3), a cooler(4), and a compressor(5) to a connection line. Working fluid, which is produced by mixing carbon dioxide with helium, circulates in the closed circuit.
Abstract:
PURPOSE: A relation construction device between ontology classes and a method thereof are provided to remove the restriction caused by the pattern base class relation setting by setting the relations between ontology classes of the specialized terminology through the syntax analysis. CONSTITUTION: A terminology selector(10) selects the specialized terminology in the specialized terminology domain. A sentence collector(20) collects the sentence including the specialized terminology. A syntax analyzer(30) analyzes grammatical relations between the specialized terminology and other sentence components. An extraction tool(40) reflects the syntax analyzed result and extracts the different specialized terminology from the description predicate included in the sentence. A specialized terminology adding module(50) adds the different specialized terminology to the specialized terminology ontology.
Abstract:
A polarizer and an organic light emitting device including the same are provided to improve contrast and visibility by preventing the reflection of the external light by the destructive interference of the external light reflected in a grid. A polarizer includes a base and a grid(12). The grid includes a first metal layer(13), a second metal layer(14), and an intermediate layer(15). The first metal layer is formed in one surface of the base. The second metal layer is formed on the first metal layer. The intermediate layer is arranged between the first metal layer and the second metal layer. The metal layer closed to the external light is a translucent film and has the lower reflexibility of the external light than the remaining metal layer.