• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2393-2398
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• 2003

In this paper, we proposes a new fuzzy inference system for modeling nonlinear systems given input and output data. In the suggested fuzzy inference system, the number of fuzzy rules and parameter values of membership functions are automatically decided by using the kernel-based method. The kernel-based method individually performs linear transformation and kernel mapping. Linear transformation projects input space into linearly transformed input space. Kernel mapping projects linearly transformed input space into high dimensional feature space. The structure of the proposed fuzzy inference system is equal to a Takagi-Sugeno fuzzy model whose input variables are weighted linear combinations of input variables. In addition, the number of fuzzy rules can be reduced under the condition of optimizing a given criterion by adjusting linear transformation matrix and parameter values of kernel functions using the gradient descent method. Once a structure is selected, coefficients in consequent part are determined by the least square method. Simulated result illustrates the effectiveness of the proposed technique.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.224-227
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• 2006

For estimation of three inherent optical properties (IOPs), the absorption coefficients for phytoplankton ($a_{ph}$) and suspended solid particle ($a_{ss}$) and dissolved organic matter ($a_{dom}$), from ocean reflectance, we used inversion of remote sensing reflectance model (Ahn et al., 2001) at this study. The IOP inversion model assumes that (1) the relationship between remote sensing reflectance ($R_{rs}$) and absorption (a) and backscattering ($b_{b}$) is well known, (2) the optical coefficients for pure water ($a_{w}$, $b_{bw}$) are known, (3) the spectral shapes of the specific absorption coefficients for phytoplankton ($a^*_{ph}$) and suspended solid particle ($a^*_{ss}$) and the specific backscattering coefficients for phytoplankton ($b_b^*_{ph}$) and suspended solid particle ($b_b^*_{ss}$) are known. The input data of IOP inversion model is used in-situ ocean optical data at the seawater around the Korea Peninsula for 5 years (2001-2005). We compared the output data of the IOP inversion model and the in-situ observation for seawater around the Korea Peninsula.

• 한국통신학회논문지
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• 제19권8호
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• pp.1587-1594
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• 1994

피지 예측기는 강인한 트리 부호화기에서 가장 중요한 부분 중에 하나이다. 피치 예측기는 역방향으로 블록 적용 방법과 회귀적인 방법이 결합되어 구성되어진다. 부호화기의 전송에러에 대한 성능을 개선하고 입력 음성의 피치주기의 변화를 추적하기 위해 피치 예측기의 스무더를 부가하는 방법을 제시한다. 3개의 탭을 갖는 스무더는 고정된 계수를 가지거나 피치 합성기의 출력신호의 자기상관 함수에 따라 변화되는 가계변수를 가질 수 있다. 피치 예측기에 스무더의 부가는 한 블록 내에서의 피치주기의 변화를 추적할 수 있고 채널에러에 대한 영향도 줄일 수 있다.

• 한국환경과학회지
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• 제26권11호
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• pp.1255-1266
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• 2017

Phosphorus (P) is an essential and major nutrient for both plants and animals. However, anthropogenic P in the environment may cause severe problems such as the deterioration of water quality. Therefore, it is essential for the Korean government to manage P in the agricultural sector. The annual P budget for Korea was 46 kg P ha-1 in 2013, placing Korea in second among Organisation for Economic Co-operation and Development (OECD) countries. P surplus and deficiency in agricultural lands can be estimated according to the P budget, which is one of the OECD agri-environment indicators. In the P budget, it is important to ensure consistency in the input-output data sources, in order to apply national and regional policies for the environmentally sound management of agricultural P. This study examines the impacts on the input-output data sources in the regional P budget in Korea. P budgets were between 99-145 kg-P/ha, depending on different data sources. We suggest two recommended data combinations (DC 1 and DC 2) for reliability of the data. P budgets calculated using DC 1 and DC 2 were 128 kg-P/ha and 97 kg-P/ha, respectively. According to the results, one of the core factors affecting P budgets was crop production. In this study, DC 2 was recommended rather than DC 1 in order to consider the cultivated areas for various crops. It is also necessary to analyze the sensitivity of the coefficients used in P budget in the future.

• 한국농공학회논문집
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• 제56권1호
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• pp.61-70
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• 2014

South Korea is under pressure to reduce $CO_2$ emissions because of expanding request for reducing $CO_2$ emissions. In many industry sectors, $CO_2$ emissions were analyzed to reduce $CO_2$ emissions. But little effort in researching agricultural sector has been undertaken because it is recognized as environmentally friendly industry. The object of this research is to estimate $CO_2$ emissions of crops and analysis on correlation between $CO_2$ emissions and production, acreage of crops. In this study, environmental input-output analysis was used to estimate $CO_2$ emissions of agricultural sector and spearman correlation coefficient was used to analysis on correlation between $CO_2$ emissions and statics like production and acreage. As a result, rice, barley, pulses and horticultural specialities had correlation with acreage and correlation coefficients of these crops were 0.800~0.933. Regression equations about $CO_2$ emissions and acreage of rice, barley, pulses and horticultural specialities was made and $R^2$ of these equations were 0.615~0.929. Using equations, $CO_2$ emissions of rice, barley, pulses and horticultural specialities can be estimated with acreage.

• 한국경제지리학회지
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• 제15권3호
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• pp.424-436
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• 2012

지방자치제도가 정착되면서 각 지자체들이 지역의 발전을 위하여 지역산업 육성을 위한 정책을 계획하고 실행하는데, 이를 위해서는 지역의 여건에 맞는 산업입지 및 경제기반을 구축하는 것이 매우 중요하다. 지역의 발전을 위해서는 지역산업의 발전이 선행되어야 하며, 해당 지역의 여건에 맞는 산업을 집중하여 발전시킬 필요가 있다. 이 연구는 전국을 7개 지역으로 구분하고, 2005 지역산업연관표의 78개 부분 생산유발계수 열합계 자료를 이용하여, 인자분석을 실시하였으며 8개의 인자를 추출하였다. 제1인자는 동남권을 중심으로 파급효과가 높은 산업, 제2인자는 수도권, 제3인자는 대경권과 호남권, 제4인자는 제주권, 제5인자는 강원권과 관련이 높은 산업이 도출되었다. 제6인자는 충청, 호남, 대경, 동남권 내부적으로 파급효과가 큰 산업을 설명하고 있으며, 제7인자는 제주권에서 수요가 증가되었을 때 타지역에서 파급효과가 큰 산업, 마지막으로 제8인자는 타지역에서 수요가 증가할 경우 충청권에 파급효과가 큰 산업으로 분석되었다.

• 한국IT서비스학회지
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• 제19권2호
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• pp.23-35
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• 2020

The development of digital technology is changing the paradigm of the healthcare industry to preventive and consumer-oriented. The combination of the ICT industry and the bio-healthcare industry is emerging as a core industry in the era of the Fourth Industrial Revolution. The Korean government has also selected the bio-healthcare industry as one of the three key future development industries. In May, the government announced its bio-health industry innovation strategy and set a goal of 300,000 employees. Therefore, analyzing the effects of employment on the related industries of the digital bio-healthcare industry is very important for the establishment of future industrial and technology development policies. The research method restructures the integrated classification of 32 industries into 34, including the digital bio-healthcare industry, using the classification criteria of the government and professional institutions, and then reorganizes the digital bio-healthcare industry into eight industries classified as one industry group. The analysis data was taken from the Bank of Korea's 2019 data. Various trigger coefficients and ripple effects coefficients were rewritten using the analysis method of the Input-output Statistics. The analysis of the results compares the employment-induced effects of the digital bio-healthcare industry and the ripple effects of related industries in production, investment and value-added. In addition, in terms of investment effect, the effects of in-house and related industries were compared. It is hoped that the results of this study will be used to establish employment and industrial policies.

• 한국건설관리학회논문집
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• 제20권6호
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• pp.117-125
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• 2019

본 연구에서는 해외 산업단지 건설의 국내경제 파급효과를 극대화하기 위한 방안을 도출하는데 목적이 있다. 이를 위해 해외 건설협회의 준공실적 원시자료와 산업연관모형을 응용하여 산업단지 개발단계별(조사설계, 단지조성, 공장건축) 유발계수를 도출하였다. 분석결과, 도시용역은 인건비 비중이 높게 나타나고 있으며, 단지토목은 손익액 비중이 높게 나타났다. 이에 비해 공장건축은 중간투입비중과 손익비중이 높게 나타났다. 결국 동일한 공종과 비교할 때 산업단지의 해외개발은 고용측면에서는 용역이, 기업의 영업잉여 측면에서는 토목과 건축이, 국가경제 측면에서는 건축의 효과가 크게 나타난다. 따라서 우리나라 국내경제 파급 효과를 극대화하기 위해서는 단순히 해외 산업단지 개발을 통해 부지를 분양하는 사업구조보다는 산업단지 내 공장 건축까지 사업에 포함할 수 있는 수주전략을 도모할 필요가 있음을 시사한다.

• 대한전자공학회논문지
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• 제26권11호
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• pp.1880-1885
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• 1989

In this paper, a new approach for systolic array realizing the discrete cosine transform (DCT) based on discrete Fourier transform (DFT) of an input sequence is presented. The proposed array is based on a simple modified DFT(MDFT) version of the Goertzel algorithm combined with Kung's approach and is proved perfectly. This array requires N cells, one multiplier and takes N clock cycles to produce a complete N-point DCT and also is able to process a continuous stream of data sequences. We have analyzed the output signal-to-noise ratio(SNR) and designed the circuit level layout of one-PE chip. The array coefficients are static adn thus stored-product ROM's can be used in place of multipliers to limit cost as eliminate errors due to coefficients quantization.

• Fisheries and Aquatic Sciences
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• 제10권3호
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• pp.159-169
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• 2007

The complex 2-dimensional movements of fish during an annual migration circuit were generated and simulated by a chaotic model of fish movement, which was expanded from a small-scale movement model. Fish migration was modeled as a neural network including stimuli, central decision-making, and output responses as variables. The input stimuli included physical stimuli (temperature, salinity, turbidity, flow), biotic factors (prey, predators, life cycle) and landmarks or navigational aids (sun, moon, weather), values of which were all normalized as ratios. By varying the amplitude and period coefficients of the klinokinesis index using chaotic equations, model results (i.e., spatial orientation patterns of migration through time) were represented as fish feeding, spawning, overwintering, and sheltering. Simulations using this model generated 2-dimesional annual movements of sea bream migration in the southern and western seas of the Korean Peninsula. This model of object-oriented and large-scale fish migration produced complicated and sensitive migratory movements by varying both the klinokinesis coefficients (e.g., the amplitude and period of the physiological month) and the angular variables within chaotic equations.