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孫英模,麻鎬燮,鄭永觀 慶尙大學校 1990 論文集 Vol.29 No.1
The demand and supply of land are to be steadily increasing as the population is mounting and the social, economic and indusrial development gradually grows. Therefore the effcient use of land becomes one of the most important issues for the national development and social welfare. Our country composed of forests with 65%, this potential value brings us unbonded benefit. The use of land for the graveyard, however, has suggested the very important social problem althought it occupies 2% of the forest land area. In view of this situation this paper was attempted to suggest the improvements for the issues of grave system in Korea. The improvements are following: 1. Reformation of national sene 2. Reduction of large scale of graveyard. 3. Urgent recovery of the effectiveness of the provision of the law which proved a dead letter. 4. The establishment fo park cemetery, and the amendment and supplements of the standard for the facilities. 5. Expulsion of a private graveyard of natural men. 6. Expansion of buring and cremation establishment. In conclusion ,the contents of kind of reform measures have the contents of being able to be practiced at once . and the contents of which requires the establishment of long term planning and practice also exist. Such things are complexly formed and we have to practice them with the continuous interest. and thus the relation between the living person and the dead person is not concerned to the loss which is given to the living person one sidely. but the living person and dead person hereby coexit.
麻鎬燮,孫英模,金義庚,鄭永觀 慶尙大學校 1990 論文集 Vol.29 No.1
This study was carried out to estimate and evaluate the public function of forest resoruces, such as soil runoff control, landslide control, head-wsater conservation. purification of air (O? production and CO? purification ), sanitary andoutdoor recreation andwildlife protection for the forest land of 6.500.000 ha in Korea. The results obtaiend were as follows; 1 The function of soil runoff control was estimated to b e1.970million m?.its monetary value was appraised at 3.814.5 billion wons. 2.The function of landslide control was estimated to be 37.876 thousand m?its monetary value was appraised at 73.3 billion wons. 3. The function of head-water conservation was estimated to be 25.507million tons, its monetary value was appraised at 3.571.0 billion wons. 4.The production fo O? in the forest land was estimated to be 78.600 thousand tons,its monetary value was appraised at 3.930.0billion wons. 5.The volume of CO? absorbed in the forest land was estimated to be 94.320 thousand tons,its monetary value appraised at 2.204.3 billion wons. 6.The monetary value of outdoor recreation was appraised at 1.162.5 billion wons. 7.The phytoncide emmited in the forest land was estimated to be 1.954 thousand tons,the function of forest bath using phytoncide was appraised at 1.953.9 billion wons. 8.The monetary value of the functions of wildife protection, control of harmful insect control of tree growth and loss control of timber qality was appraised at 327 1 billion wons. In conclusion, the value of public functions of forest is more 23 times than that of the econmic function. production value of forest products, and comes to 14% of GNP. And also, the function of air purification.and and soil conservation has value than those of others. Particulary, it takes a more great deal of effort achiving the various works such as erosion control, establishment of recreation forest. management of reserved natural forest and afforestation of street tree for increasing of public functions.
Son, Young Seop,Kim, Wonhee,Lee, Seung-Hi,Chung, Chung Choo IEEE 2015 IEEE Transactions on Vehicular Technology VT Vol.64 No.8
<P>In this paper, we propose a new approach for a robust multirate lane-keeping control scheme with predictive virtual lanes. First, the multirate lane-keeping control scheme is proposed to improve the lane-keeping performance and to reduce the ripple in the yaw rate. To improve the lane-keeping performance on a curved road, the integral of the lateral offset error is added to the state feedback controller. A multirate Kalman filter (KF) has been developed to resolve the problems caused by slow lane detection due to the vision processing system. This multirate KF estimates vehicle states at a fast rate using a microprocessor. Utilizing the estimated states, the linear quadratic state feedback control operates at the same fast update rate of the microprocessor. Thus, a multirate control scheme can reduce the ripple in the yaw rate. Second, we propose a virtual lane prediction method that compensates for the momentary failure of lane detection from unexpected problems. If the camera sensor momentarily fails while obtaining lane information, the predicted virtual lane can be substituted for the lane detection using the camera sensor in the proposed control scheme. Thus, the proposed control scheme can normally operate when the lane information is momentarily unavailable. The performance of the proposed method was evaluated via experiments.</P>
Asynchronous Sensor Fusion using Multi-rate Kalman Filter
Young Seop Son(손영섭),Wonhee Kim(김원희),Seung-Hi Lee(이승희),Chung Choo Chung(정정주) 대한전기학회 2014 전기학회논문지 Vol.63 No.11
We propose a multi-rate sensor fusion of vision and radar using Kalman filter to solve problems of asynchronized and multi-rate sampling periods in object vehicle tracking. A model based prediction of object vehicles is performed with a decentralized multi-rate Kalman filter for each sensor (vision and radar sensors.) To obtain the improvement in the performance of position prediction, different weighting is applied to each sensor’s predicted object position from the multi-rate Kalman filter. The proposed method can provide estimated position of the object vehicles at every sampling time of ECU. The Mahalanobis distance is used to make correspondence among the measured and predicted objects. Through the experimental results, we validate that the post-processed fusion data give us improved tracking performance. The proposed method obtained two times improvement in the object tracking performance compared to single sensor method (camera or radar sensor) in the view point of roots mean square error.
손영섭(Young Seop Son),이승희(Seung-Hi Lee),이영옥(Young Ok Lee),정정주(Chung Choo Chung) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
In the case of autonomous vehicles, it is practical to utilize camera and radar to detect front obstacle vehicles. By this we mean that such expensive scanners are hardly adopted in the automotive industry. Vision is also used for sensing road environment. Recent trends in the lane keeping/changing system research are using the vision system to obtain the road information. A multirate sensor fusion scheme is developed to achieve more accurate obstacle detection. The scheme uses a camera and radar is to present obstacle vehicle pose estimation at a fast period of controller.
MPC-based active steering for autonomous vehicle systems
Young Ok Lee(이영옥),Chung Choo Chung(정정주),Seung-Hi Lee(이승희),Young Seop Son(손영섭) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
In this paper, we present how model predictive control (MPC) is applied to lane keeping system (LKS). Due to a slow sampling rate of the vision system, the conventional LKS using single rate control may cause uncomfortable steering control rate in a high vehicle speed. By applying MPC to active steering, the proposed MPC-based active steering prevents undesirable oscillatory steering control command even at a vehicle speed of 30[㎧]. The effectiveness of the MPC is validated by simulation for the LKS equipped with a camera module having a slow sampling rate.