Abstract:
The present invention relates to a method for frequency sharing of a high frequency ocean surface radar, which assigns two signal waveforms orthogonal to each other to the same frequency band so as to reuse the frequency, and an embodiment of the present invention is as follows. Two radars can be operated without interfering each other in the same frequency band by assigning an up-chirped linear frequency modulation (LFM) waveform signal and a down-chirped LFM waveform signal of the same frequency band to the two frequency ocean surface radar, respectively, using the characteristics of the two waveform signals orthogonal to each other. In addition, multiple radars located within the distance possible to be interrupted can be operated without interfering with each other by combining and assigning multiple frequency bands and the two orthogonal signals to the radars. Because the frequency reuse technique of the present invention continuously uses chirped LFM signals without time division, continuous real-time observation over a large region is possible and thereby the accuracy of obtained information on an ocean surface is raised. Efficient frequency reuse is achieved by combining two LFM signal waveforms, which have a characteristic of being orthogonal to each other, with multiple frequency bands.
Abstract:
본 발명은 글루타메이트 디카르복실라아제 활성을 갖는 신규한 미생물 락토바실러스 BFC90 (KCTC 11584BP)와 락토바실러스 BFC110(KCTC 11601BP ) 균주를 이용하여 아미노부틸산을 제조하는 방법에 관한 것으로서, 본 발명의 락토바실러스 균주를 사용하면 고농도의 아미노부틸산을 생산할 수 있다. 아미노부틸산, 글루타메이트 디카르복실라아제, 락토바실러스
Abstract:
PURPOSE: A novel microorganism Lactobacillus strain and a method for preparing amino butyric acid through fermentation and enzyme method are provided. CONSTITUTION: A Lactobacillus BFC90(KCTC 11584BP) or Lactobacillus BFC11(KCTC 11601BP) has glutamate dicarboxylase activity. A method for preparing amino butyric acid comprises: a step of culturing Lactobacillus BFC90(KCTC 11584BP) or Lactobacillus BFC11(KCTC 11601BP); and a step of collecting culture strain and contacting with glutamic acid or glutamate. The method further comprises a step of contacting the strain with a coenzyme.
Abstract:
본 발명은 1분 이상의 장시간으로 측정된 데이터로부터 1분 누적 강우 강도 분포로 변환 예측하는 누적시간에 따른 강우 강도 분포 변환 방법에 관한 것으로, 수분 단위로 측정된 강우 강도 데이터를 1분 누적 강우 강도 데이터로 변환하기 위한 방법에 있어서, (a) 특정 수분 단위로 측정된 강우 강도 데이터를 데이터베이스로부터 읽는 단계; (b) 상기 특정 수분 단위로 측정된 강우 강도 데이터를 1분 누적 강우 강도 데이터로 변환하기 위해, 상기 특정 수분 단위에 대응되는 제1 상관 계수(b)와 제2 상관 계수(α)를 획득하는 단계; 및 (c) 상기 특정 수분 단위로 측정된 강우 강도 데이터에, 대응되는 제1 상관 계수(b)를 자승하고, 상기 자승한 값과 대응되는 상기 제2 상관 계수(α)를 곱해 1분 누적 강우 강도 데이터로 변환하는 단계를 포함한다. 강우, 강도, 분포, 누적, 시간, 변환
Abstract:
A conversion algorithm of the rainfall intensity distribution according to the accumulated time data is provided to effectively estimate domestic one minute accumulation rainfall intensity distribution by converting data measured for a long time more than one minute into the one minute accumulation rainfall intensity distribution. Rainfall intensity data which is measured by a specified few minutes unit is read out from a database(101). A first coefficient of correlation and a second coefficient of correlation which correspond to the specified few minutes unit are obtained to convert the rainfall intensity data into one minute accumulation rainfall intensity data(102). The measured rainfall intensity data are converted into the one minute rainfall intensity data by squaring the first coefficient correlation in the measured rainfall intensity data and multiplying the result by the second coefficient correlation(103).
Abstract:
밀리미터파 대역 기반 통신 연결 서비스 제공 방법이 제공되며, 적어도 하나의 셀을 형성하는 적어도 하나의 기지국으로부터 수신되는 신호의 크기를 측정하는 단계, 측정된 신호의 크기에 기초한 신호 데이터를, 적어도 하나의 기지국과 매핑하여 저장하는 단계, 저장된 신호 데이터에 기초하여 적어도 하나의 기지국 중 어느 하나의 기지국을 선택하는 단계, 및 선택된 기지국으로 통신을 연결하는 단계를 포함한다.
Abstract:
An apparatus and a method for receiving a signal by using an RF filter bank are provided to minimize the interference from the outside by using an RF filter bank placed at an RF front-end. An RF broadband filter(11) removes signals except the signals of the preset RF bandwidth among signals received at an antenna, and an RF filter bank(12) filters an RF signal, which passes through the RF wideband filter, by a frequency channel filter. A frequency down-converting unit(10) noise-amplifies the passing RF signal, and removes a harmonic signal which occurs during the amplification. The frequency down-converting unit mixes the RF signal with a local oscillating signal to convert the mixed signal into an IF signal.