• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.11a
• /
• pp.1507-1510
• /
• 2012

본 논문은 EPS(전자식 파워 스티어링)에 사용되는 Torque and Angle sensor 의 절대각 신뢰성 보증 방식에 관한 것으로, Inductive 방식의 센서에서 절대각 신호 신뢰성 보증에 대한 효과적인 방법을 제시한다. 전동식 파워 스티어링 시스템의 ECU(전자제어유닛)는 조타각도를 출력하는 2 개의 소자에서 버니어 알고리즘을 통해 360 도 이상의 멀티 조타각을 인식하게 된다. 토크&조향각 센서는 절대 조향각을 계산하는 1 개의 Hall IC 소자 신호와, 상대 조향각을 계산하는 ASIC 소자 신호를 사용하여 멀티 조타각을 인식한다. 인식된 조타각이 추가적인 검증 절차 없이 제어에 사용된다면, 센서의 이상 발생 시에 운전자의 조타감을 불편해질 수 있고, 나아가서는 차량사고의 위험을 발생시킬 수 있다.따라서 차량 거동 시 절대 조향각의 신뢰성 검증은 제어와 동시에 항상 요구되어야 한다. 특히, 유럽/미국 업계의 ISO 26262 표준 도입에 따라 절대 조향각의 높은 신뢰성이 요구된다. 본 논문에서는 이러한 요구사항을 만족하기 위해 측정된 절대각 신호를 기준으로 상대각 신호 2 개를 측정에 사용하고, Driving 시에도 절대각 기준의 신뢰도 향상을 위해 절대각 신호 1 개를 비교기로 사용한다. 최적화된 에러 기준을 근거로 절대 조향각 신호의 신뢰성을 보장하는 방법을 제안한다. 이러한 방법을 적용한다면, 정확하고 안정적으로 조타각을 결정함으로써 EPS 안전성 확보에 도움을 줄 수 있다.

• Journal of Korean Philosophical Society
• /
• v.141
• /
• pp.203-224
• /
• 2017

In Laozi Tao(道) is not only the universal law of all existence but the eternal law of morality. In Laozi Tao as the eternal law of morality is the absolute criteria of value-judgement. In this respect in Laozi Tao is the perfect value or the absolute criteria of value-judgement. And so someone can evaluate Laozi's perspective on the theory of value is value-absolutism. Nonetheless, Laozi allows all theories of value in Laozi. Laozi's thought on the value is indifferent to what kind of value one has. But Laozi's ideal of the theory of value is value-universalism through Tao as the absolute criteria of value-judgement. So in Laozi the perspective on value is the universalization of value-absolutism. In Laozi, the medium of value-universalism is being of Sage(聖人) and all human's inpersonation of Teh(德). If this two conditions fulfilled, all human beings can reach the state of "subtle identification(玄同)" and can be sages, and value-universalism take the form of valuelessism.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.14 no.2
• /
• pp.181-188
• /
• 1996

Geodetic Satellite Positioning Techniques (NNSS, Transit, Doppler, VLBI, SLR etc.) still have much difficulty in surveying and necessity of point positions is being amplified in korea. Therefore some research institutes have being investigated point positioning using the GPS. In this study, 1 arranged the theory deal with point positioning using GPS carrier beat phase of dual frequency and estimated corrections of errors that be included in GPS observable. Also, 1 determined point position by the differencing scheme of GPS carrier phase, and analyzed the accuracy of point position. 1 suggested potentiality of geodetic point positioning using GPS carrier phase by comparing result of relative positioning with result of point positioning and analyzing result of network adjustment fixed any point position.

• Proceedings of the Korean Institute of Intelligent Systems Conference
• /
• 2004.10a
• /
• pp.453-456
• /
• 2004

퍼지논리제어기는 제어 대상 플랜트에 관한 완전한 정보를 필요로하지 않으면서도 우수한 제어 성능을 발휘하는 비선형 제어기이다. 그러나 퍼지논리제어기는 많은 장점에도 불구하고 엄격한 수학적 해석을 요구하는 안정성 분석의 관점에서는 다소의 문제점을 가지고 있다. 본 논문에서는 퍼지논리제어기를 가지는 전체 폐루프 시스템을 섭동의 성분을 가지는 Lur'e 시스템으로 변형하고, 이를 통하여 퍼지논리제어기의 절대 안정성을 입증하고자 한다. 여기서는 이미 기존의 논문에서 제시한 간단구조 퍼지논리제어기를 대상으로 절대 안정성 해석을 제시한다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.22 no.2
• /
• pp.127-135
• /
• 2004

The calibration of lens to be used and the planning of photographing planning layout is very important to achieve the requested accuracy in the precision measurement by close-range photogrammetry. Establishment of absolute coordinate system is regarded as another important factor for the purpose of measuring absolute deformation of photogrammetric object. In this study, the following tasks were performed : (1) calibration of super-wide-angle lens or focal length 21mm fer close-range photographing used by 35mm metric camera, (2) development of the measuring system for monitoring of absolute deformation through periodic observation of small area, and, (3) application of this system to monitor the absolute deformation of surface of underwater structure in fixed cycle and to present the efficiency of the system.

• Clinical and Experimental Pediatrics
• /
• v.50 no.10
• /
• pp.982-986
• /
• 2007

Purpose : Intravenous immunoglobulin (IVIG) is effective for the treatment of idiopathic thrombocytopenic purpura (ITP) in children. Recently, several reports have been published that show its impact on the absolute neutrophil count. The present study was performed to confirm these findings. Methods : Data on 26 ITP patients were analyzed. Patients with febrile illness or increased C-reactive protein levels at presentation, which would influence the neutrophil counts, were excluded to determine the sole impact of IVIG. In addition, patients who received steroid treatment were also excluded. Results : Sixteen boys and ten girls were analyzed. For patients who received an IVIG dose of 0.4 g/kg/day (n=17), the absolute neutrophil count (ANC) measured next day was significantly decreased. For patients who received an IVIG dose of 1 g/kg/day (n=9), the ANC measured the next day was also significantly decreased. However, the decrease was more profound in the high-dose group compared to the low-dose group. Among six cases with profoundly decreased ANC greater than $1,000/mm^3$, four patients (67%) received IVIG at a dose of 1 g/kg/day. All four cases with increased ANC were treated with IVIG dose of 0.4 g/kg/day, and three cases (75%) among them had a febrile reaction during IVIG administration. None of the cases with decreased ANC had a febrile reaction. No cases had infectious complications reported. Conclusion : IVIG treatment for ITP patients appears to suppress the ANC. This decrease of ANC was more pronounced when a higher dose of IVIG was used. Some cases with increased ANC counts after IVIG use were found only in low-dose IVIG group, and was associated with febrile reactions during IVIG use.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.20 no.1
• /
• pp.95-103
• /
• 2016

The absolute value management method is widely used in the most of the earth retaining construction, which evaluates the safety by comparing measurement result and management criteria. Therefore, the management criteria is the standard to evaluate the safety of the site, and in other words, the criteria is a direct factor of the evaluation. That means that the safety of the site can not be acquired if the management criteria is not proper, even though the measurement system is perfectly set. However, many of field technicians do not have rely on the current management criteria, and they even recognize the necessity of the revision. Therefore, in this study, the necessity of the revision was studied. Also, the optimum criteria selection and the application were performed based on the test results of earth retaining deflection and probabilistic theory. The absolute value management method was used for this study. The details are tabulated.

• Journal of the Korean Society for Railway
• /
• v.14 no.2
• /
• pp.116-120
• /
• 2011

For the train positioning system currently applied in high-speed MAGLEV train systems, it is classified into absolute positioning systems which discontinuously detect train positions, and relative positioning systems which continuously detect train positions. In this paper we analyze the configuration model and the numerical model of the absolute positioning system applied in TRANSRAPID which is a representative high-speed MAGLEV train, and design the two configuration models specific to the recognition structures of absolute positioning systems. We also verify the compatibility of the design models of absolute positioning system through simulation using MATLAB and propose the optimal configuration model of absolute positioning systems for high-speed MAGLEV train system.

• Bulletin of the Korean Space Science Society
• /
• 2011.04a
• /
• pp.21.1-21.1
• /
• 2011

우리는 분리형 쌍성 11개(원궤도 7개, 타원궤도 4개), 반분리형 쌍성 7개와 접촉형 쌍성 9개(근첩촉형 3개, 접촉형 2개, 초과 접촉형 4개)를 포함하는 27개의 다양한 종류의 표준식쌍성의 분석하여 절대량을 구하였다. 표준 식쌍성은 식쌍성의 광도곡선이 적어도 두 파장 영역 이상에서 그리고 모든 위상에서 골고루 관측되었고, 쌍성의 두 구성원 별에 대하여 시선속도 곡선이 발표된 식쌍성, 즉, 이중분광선 식쌍성 (Double line spectroscopic eclipsing binariy)으로 정의한다. 우리는 표준식쌍성의 370개의 후보에 대하여 문헌을 조사하여 관측 데이터를 확보 하였다. 이중에서 시선속도곡선과 광도곡선 자료가 동시에 존재하는 식쌍성은 80개이다. 이번 연구에서 우리는 표준식쌍성의 관측 질을 고려하여 27개의 식쌍성을 선택하여 절대량을 계산하였고, 이전 연구자들이 발표한 절대량과 비교 하였다. 이 논문에서 제시한 표준식쌍성의 유용성을 확인하기 위해 소마젤란은하에서 발견한 식쌍성의 광도곡선을 분석하여 측광학적인 해를 구하는 작업을 수행하였다. 이를 위하여 표준 식쌍성을 식쌍성의 종류별로 구분하고, 소마젤란은하에서 발견된 식쌍성 20여개를 선정하였다. 선정된 식쌍성을 표준식쌍성의 광도곡선과 형태를 비교하여 초기값을 결정하였고, 반복적인 차등보정법으로 측광학적인 해를 구하였다. 이 논문에서 제시한 표준식쌍성이 소마젤란은하에서 발견된 식쌍성들의 광도곡선의 형태를 대부분 포함하는 다양한 분포로 형성되어 있고, 이에 따른 측광학적인 해가 관측과 잘 일치함을 보여주고 있다.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.14 no.2
• /
• pp.107-113
• /
• 2011

To evaluate the performance of the hydrodynamic model, we introduced 10 skill assessments that are assorted by two groups: quantitative skill assessments (Absolute Average Error or AAE, Root Mean Squared Error or RMSE, Relative Absolute Average Error or RAAE, Percentage Model Error or PME) and qualitative skill assessments (Correlation Coefficient or CC, Reliability Index or RI, Index of Agreement or IA, Modeling Efficiency or MEF, Cost Function or CF, Coefficient of Residual Mass or CRM). These skill assessments were applied and calculated to evaluate the hydrodynamic modeling at one of Florida estuaries for water level, current, and salinity as comparing measured and simulated values. We found that AAE, RMSE, RAAE, CC, IA, MEF, CF, and CRM are suitable for the error assessment of water level and current, and AAE, RMSE, RAAE, PME, CC, RI, IA, CF, and CRM are good at the salinity error assessment. Quantitative and qualitative skill assessments showed the similar trend in terms of the classification for good and bad performance of model. Furthermore, this paper suggested the criteria of the "good" model performance for water level, current, and salinity. The criteria are RAAE < 10%, CC > 0.95, IA > 0.98, MEF > 0.93, CF < 0.21 for water level, RAAE < 20%, CC > 0.7, IA > 0.8, MEF > 0.5, CF < 0.5 for current, and RAAE < 10%, PME < 10%, CC > 0.9, RI < 1.15, CF < 0.1 for salinity.