Abstract:
PURPOSE: A device for separating the adjuncts from a space vehicle is provided to minimize the current consumption since a locking device operates with little power to operate a separating device if a rotating unit consists of a spring and the locking device. CONSTITUTION: A device(100) for separating the adjuncts from a space vehicle comprises a separating body(1), a main body(2) and a screw jack device(3). The separating body is fixed to the adjuncts of a space vehicle. The separating body comprises a space with a groove. The main body is fixed to the space vehicle. The main body is separably inserted into the space. The main body comprises a penetration hole formed on the location corresponding to the groove. The screw jack device is installed in the main body.
Abstract:
본 발명은 이중 직교 주파수 분할 다중화(DOFDM: Double Orthogonal Frequency Division Multiplexing)/이중 직교 주파수 분할 다중 접속(DOFMA: Double Orthogonal Frequency Division Multiple Access) 통신 시스템에서 신호 송신 장치의 신호 송신 방법에 있어서, N개의 서브 캐리어 각각 별로 M개의 서브 샘플에 대해 M 포인트 역 이산 푸리에 변환(IDFT: Inverse Distribute Fourier Transform)(M-IDFT)을 수행하는 과정과, 상기 N개의 서브 캐리어 각각 별로 M-IDFT를 수행한 신호에 제1길이를 가지는 사이클릭 프리픽스(CP: Cyclic Prefix)를 삽입하여 제1신호를 생성하는 과정과, 상기 N개의 서브 캐리어 각각 별로 생성된 제1신호에 대해 N 포인트 IDFT(N-IDFT)를 수행하는 과정과, 상기 N-IDFT를 수행한 신호를 병렬/직렬 변환하는 과정과, 상기 병렬/직렬 변환된 신호에 제2길이를 가지는 CP를 삽입하여 제2신호를 생성� �는 과정과, 상기 제2신호를 신호 수신 장치로 송신하는 과정을 포함하며, 상기 N은 상기 DOFDM/DOFDMA 통신 시스템에서 사용하는 서브 캐리어들의 개수를 나타내며, M은 1 이상의 정수를 나타냄을 특징으로 한다. row wised OFDM 방식, column wised OFDM 방식, 중계기, CP, IDFT, DFT
Abstract:
Provided are a method and apparatus for controlling media access in a sensor network and a method of managing traffic information. Since traffic information is exchanged between nodes and data is transmitted by using a dynamic long preamble according to receiver nodes, data transmission efficiency can be improved, energy consumed to transmit the long preamble can be reduced, and data transmission delay can be reduced as well.
Abstract:
An impulse measuring device of a thruster and a method thereof are provided to increase the data processing speed and to precisely measure the very small size impulse by reducing the various errors. An impulse measuring device of a thruster comprises a swinging offer part(102), a sensor(105), and a data processing part(109). The thruster(101) is fixed at the swinging offer part. The thruster is reciprocated by the swinging offer part around the equilibrium point. The sensor measures the exercise hours of the thruster. The exercise hours of the thruster are the time to thruster pass through the arbitrary point-to-point interval. The amount of change of the exercise hours is the difference between the exercise hours while the thruster is running and the exercise hours while it is not.
Abstract:
An auto-recognition data correcting apparatus based on reliability, a method thereof, and a computer readable recording medium for recording a program for implementing the same are provided to generate data consistent with real data by correcting auto-recognition data even when application environment is inferior. A reliability based auto recognition data correcting apparatus comprises a data storage control unit(110), a data correction condition setting unit(140), and a data correction unit(170). The data storage control unit sets a data storage space for cumulative record of auto recognition data obtained in correspondence to an object from a data auto recognition apparatus. The data correction condition setting unit sets a correction condition as a reference for converting the auto recognition data for the object into correction data for the object based on pre-designated reliability. The data correction unit generates the correction data by comparing a cumulative record state of the auto recognition data with the correction condition.
Abstract:
An apparatus for forming stress corrosion cracks is provided to improve the reliability of an atomic electrical power plant or a process industry by using vapor pressure and tubal samples. A heating unit(20) comprises a conductive member arranged on the outer surface of a tubal sample in a circumference direction and a heating coil arranged adjacent to the conductive member and generates vapor pressure. A control unit(40) controls the heating unit and a both-end binding unit(30). The both-end binding unit consists of an upper plate(31) for blocking the both ends of the tubal sample, a lower plate(32) and a tension bar(33). The tension bar adjusts the interval between the upper plate and the lower plate.
Abstract:
A paraffinic fuel manufacturing device for hybrid rockets is provided to enable to be promptly manufactured while minimizing the contraction of paraffinic fuel in a radial direction through the compression of gas. A paraffinic fuel manufacturing device for hybrid rockets comprises a molding unit(110) for accommodating liquid paraffinic fuel to be frozen and solidified by high-pressure gas. The molding unit consists of a sealable vessel(1) and a fuel gas supplying portion(2) connected to the vessel. The vessel is comprised of: a housing(11) whose top and bottom are opened; a bottom plate(12) connected to the lower part of the housing and a top plate(13) connected to the upper part of the housing. The top plate includes a fuel gas supplying portion.
Abstract:
본 발명은 OFDMA 시스템에서 공통 레인징 부호를 사용하여 각 레인징 부채널을 보상함으로써, 다중 접속 간섭(MAI)의 영향을 억제하여 레인징 부호 검출 성능을 향상시킬 수 있는 OFDMA 시스템에서 공통 레인징 부호를 이용해 레인징 부호를 검출하기 위한 송신 및 수신 장치와, 레인징 부호 검출 방법에 관한 것으로, 모든 사용자 단말기들이 공통으로 사용하는 공통 레인징 부호가 특정 공통 레인징 부채널에 할당되어 사용자에 의해 선택된 초기 레인징 부호와 함께 수신되면, 고속 푸리에 변환을 수행한 후, 레인징 부채널별로 역다중화하는 제1 단계; 상기 역다중화된 부채널 정보 중 상기 공통 레인징 부채널에 할당된 상기 공통 레인징 부호를 이용해 다수 사용자 단말기들 간의 심볼 시간 옵셋에 의한 다중 접속 간섭(MAI) 성분을 추정하는 제2 단계; 상기 추정된 다중 접속 간섭 성분을 이용해 각 레인징 부채널에 대한 간섭 보상하는 제3 단계; 상기 간섭 성분이 보상된 초기 레인징 심볼에 대해 기지국의 레인징 부호 집합과의 상관도를 계산하는 제4 단계; 및 상기 상관도와 임계값을 비교하여 상기 사용자 단말기로부터 전송된 레인징 부호를 검출하는 제5 단계를 포함한다. OFDMA, 공통, 레인징, 부호, 다중, 접속, 간섭, 검출
Abstract:
A method for processing handover in a bridge-based RAS(Radio Access Station) backbone network is provided to easily and simply manage a RAS backbone network using a 2-layer ethernet bridge, to efficiently and speedily process handover, and to improve the efficiency of the RAS backbone network. Receiving a disconnection report message, based on handover, from an MN(Mobile Node), an existing SCB(Site Core Bridge) directs SCBs, located at the end of an existing MAC-in-MAC tunnel, to delete tunnel information and associated MN information(0,1). Afterwards, the existing SCB informs an HLR that the MN has initiated handover, and the HLR changes the operation state of the MN from "active" to "handover"(2). The MN moves to a new BSB(Base Station Bridge)(3). Meanwhile, the fourth SCB discards a frame received on the move of the MN as information about the MN has been already deleted(4). In this case, the fourth SCB discards the frame while querying the HLR about the location information of the MN(5). If the movement to the new BSB is completed, the MN executes registration procedures. At this moment, the MN transmits a route update message, including its own MAC address and IP address, to the new BSB so that it can be forwarded to a new SCB.
Abstract:
화소회로는발광다이오드, 제1 NMOS 트랜지스터, 제2 NMOS 트랜지스터, 제3 NMOS 트랜지스터, 및저장커패시터를포함한다. 발광다이오드는전원전압에연결되는애노드전극을포함한다. 제1 NMOS 트랜지스터및 제2 NMOS 트랜지스터는데이터라인과제1 노드사이에서로직렬로연결된다. 제3 NMOS 트랜지스터는발광다이오드의캐소드전극에연결되는드레인전극, 제1 노드에연결되는게이트전극, 접지전압에연결되는소스전극, 및접지전압에연결되는바디전극을포함한다. 저장커패시터는제1 노드와접지전압사이에연결된다. 제1 NMOS 트랜지스터의게이트전극및 제2 NMOS 트랜지스터의게이트전극은스캔라인에공통으로연결되고, 제1 NMOS 트랜지스터의소스전극과바디전극은서로전기적으로연결되고, 제2 NMOS 트랜지스터의소스전극과바디전극은서로전기적으로연결된다. 제1 NMOS 트랜지스터의드레인전극은데이터라인에연결되고, 제1 NMOS 트랜지스터의소스전극및 바디전극은제2 노드에연결된다. 제2 NMOS 트랜지스터의드레인전극은제1 노드에연결되고, 제2 NMOS 트랜지스터의소스전극및 바디전극은제2 노드에연결된다.