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텔레메틱스 단말기 내의 오디오/비디오 명령처리를 위한 임베디드용 음성인식 시스템의 구현
권오일,이흥규,Kwon, Oh-Il,Lee, Heung-Kyu 대한전자공학회 2005 電子工學會論文誌-TC (Telecommunications) Vol.42 No.11
In this paper, we implement the embedded speech recognition system to support various application services such as audio and video control using speech recognition interface on cars. The embedded speech recognition system is implemented and ported in a DSP board. Because MIC type and speech codecs affect the accuracy of speech recognition. And also, we optimize the simulation and test environment to effectively remove the real noises on a car. We applied a noise suppression and feature compensation algorithm to increase an accuracy of sppech recognition on a car. And we used a context dependent tied-mixture acoustic modeling. The performance evaluation showed high accuracy of proposed system in office environment and even real car environment. 본 논문에서는 차량 내에서 음성인식 인터페이스를 이용한 오비오, 비디오와 같은 응용서비스 처리를 위해 임베디드형 음성인식 시스템을 구현한다. 임베디드형 음성인식 시스템은 DSP 보드로 제작 포팅된다. 이는 음성 인식률이 마이크, 음성 코덱 등의 H/W의 영향을 받기 때문이다. 또한 차량 내 잡음을 효율적으로 제거하기 위한 최적의 환경을 구축하고, 이에 따른 테스트 환경을 최적화한다. 본 논문에서 제안된 시스템은 차량 내에서의 신뢰적인 음성인식을 위해 잡음제거 및 특징보상 기술을 적용하고 임베디드 환경에서의 속도 및 성능 향상을 위한 문맥 종속 믹스쳐 공유 음향 모델링을 적용한다. 성능평가는 일반 실험실 환경에서의 인식률과 실제 차량 내에서의 실차 테스트를 통해 검증되었다.
權五逸,梁玄錫 弘益大學校 科學技術硏究所 2004 科學技術硏究論文集 Vol.15 No.-
As the number of vehicles increases, solving a traffic congestion problem and decreasing casualties by automobile accidents become the most important research areas for vehicular researchers. Traffic congestion problem is solved, theoretically, by constructing lots of roads, which is not practically possible due to the limited budget. Instead, researchers are trying to develop a smart traffic signal system that optimizes the traffic flow and to develop a smart highway system that increases the capacity of highways by allowing a shorter distance between adjacent automobiles. To decrease casualties, it is required to develop a collision detection/avoidance system that pre-detects possible collisions and warns the driver or automatically takes the optimal action to avoid the collision if it is too late to notice to the driver. In this paper, we focus on development a collision detection system, which detects abnormal lane-change such as zig-zag driving or driving while stepping on a lane. First of all, the left and right lanes are recognized from the picture image taken by a camera attached in front of a car. Then, the distance from the center of the car to the left lane is calculated. From this measure, we can detect whether the car is crossing a lane or not. The crossing pattern is analyzed to determine whether it is a normal lane-crossing or a zig-zag driving. Simulations are done for the cases when a car changes a lane normally, is in zig-zag driving, is driving close to the left lane, and is driving while stepping on a lane. we have used 100 pictures taken with a rate of 3 pictures per 1 second while the car is moving with 60km/hr.
海上危險變動에 따른 積荷保險上의 保險者 責任에 關한 硏究
權五 건국대학교 1989 論文集 Vol.28 No.1
There is usual to use English marine insurance policy and the interpretation of that phraselogy is subject to English law and practice in the trade. The policy is a insurance document which contains nothing more than the name of the isurer and a clause binding the insurer to the performance of the contract. In accordance with the policy, the underwriter compensate for the loss proximately caused by the perils insured. This compensation presupposes the unchangability of self accepted risk and hazard. But the risk and hazard can change during the transshipment therefore the marine insurer's liability for the changes of risks is very important for the related party. In the loss case caused by risk and hazard, generally it is caused by a joint action of caused and by a combination of causes. The change of risks are divided into the variation of risks and the alteration of risks. The varition of risks are the deviation, the delay in voyage, the transhipment and on deck. The alteration of risks are the change of voyage, the alteration of port of departure and the change of ship. Usually the loss case is thought to be settled down more reasonably not by the doctrine of proximate cause but by the allocation theory of losses which allocates losses by the degree of risks. At this manuscript the writer could find that the marine insurers should not charge in the varition of risks and alteration of risks. But the insurers should charge of perils of the seas, which is caused by force majure resonable motive. Thus, if the insured risks are changed, the underwriter can choose as follows ; Firstly, most of all, the insurers can cancell the insurance contract. Secondly the underwriters do not charge the risks. Thirdly the insurer expand the insurance contract period by earning an additional premium.