• 정보처리학회논문지:소프트웨어 및 데이터공학
• /
• 제9권5호
• /
• pp.169-176
• /
• 2020

최근 심층 신경망 (Deep Neural Networks, DNNs)는 모바일 및 임베디드 디바이스에 인간과 유사한 수준의 인공지능을 제공해 많은 응용에서 혁명을 가져왔다. 하지만, 이러한 DNN의 높은 추론 정확도는 큰 연산량을 요구하며, 따라서 기존의 사용되던 모델을 압축하거나 리소스가 제한적인 디바이스를 위해 작은 풋프린트를 가진 새로운 DNN 구조를 만드는 방법으로 DNN의 연산 오버헤드를 줄이기 위한 많은 노력들이 있어왔다. 이들 중 최근 작은 메모리 풋프린트를 갖는 모델 설계에서 주목받는 기법중 하나는 레이어 간에 패러미터를 공유하는 것이다. 하지만, 기존의 패러미터 공유 기법들은 ResNet과 같이 패러미터에 중복(redundancy)이 높은 것으로 알려진 깊은 심층 신경망에 적용되어왔다. 본 논문은 ShuffleNetV2와 같이 이미 패러미터 사용에 효율적인 구조를 갖는 소형 신경망에 적용할 수 있는 패러미터 공유 방법을 제안한다. 본 논문에서 제안하는 방법은 작은 크기의 템플릿과 레이어에 고유한 작은 패러미터를 결합하여 가중치를 생성한다. ImageNet과 CIFAR-100 데이터셋에 대한 우리의 실험 결과는 ShuffleNetV2의 패러미터를 15%-35% 감소시키면서도 기존의 패러미터 공유 방법과 pruning 방법에 대비 작은 정확도 감소만이 발생한다. 또한 우리는 제안된 방법이 최근의 임베디드 디바이스상에서 응답속도 및 에너지 소모량 측면에서 효율적임을 보여준다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제50권1호
• /
• pp.10-14
• /
• 2001

The superconducting transmission cable is one of interesting part in power application using high temperature superconducting wire. One important parameter in HTS cable design is transport current sharing because it is related with current transmission capacity and loss. In this paper, we calculate self inductances of each layer and mutual inductances between two layers from magnetic field energy, and current sharing of each layer for 4-layer cable using the electric circuit model which contain inductance and resistance (by joint and AC loss). Also, transport current losses which are calculated by monoblock model and Norris equation are compared. As a results, outer layer has always larger transport current than inner layer, and current capacity of each layer is largely influenced by resistance per unit cable length. As a conclusion, for high current uniformity and low AC loss, we have to decrease inductances themselves or those differences.

• 전력전자학회논문지
• /
• 제8권6호
• /
• pp.585-592
• /
• 2003

The parallel operation system of UPS is used to increase reliability of power source at critical load. But parallel UPS system has a few defects, impedance is different from each other and circulating current occurs between UPSs, due to line impedance and parameter variation, though controlled by the same synchronization signal. According to such characteristic of parallel UPS, balanced load-sharing control is the most important technique in parallel UPS operation. In this paper, a novel power deviation compensation algorithm is proposed. it is composed of voltage controller to compensate power deviation that be calculated by using active and reactive current deviation between Inverters on synchronous d-q reference frame.

• 한국데이타베이스학회:학술대회논문집
• /
• 한국데이타베이스학회 2010년도 춘계국제학술대회
• /
• pp.235-247
• /
• 2010

Introduction of ICE(Integrated Collaboration Environment) has a great effect on corporate performance. In particular, it is expected that information sharing and collaboration among transaction partners will be an important factor which mediates ICE and its performance. Under such a background, this research intends to identify the influence of ICE by manufacturing industry on corporate performance through role of the parameter of information sharing and collaboration. The result of this research may be summed up as follows: ICE promotes information sharing and collaboration among enterprises, it accelerates integration of supply chain network among enterprises and cooperation. In particular, ICE has a great effect on information sharing. And information sharing has a direct effect on collaboration and performance. However, when we classify corporate performance into the "performance due to introduction", which is direct performance, and the "overall performance", which is indirect performance, the result of this research is as follows: information sharing has a great effect on the performance due to introduction, but does not have a meaningful effect on indirect performance. On the other hand, collaboration does not have any effect on the performance due to introduction, but has a meaningful effect on the overall performance, which is indirect performance. It is necessary to study and analyze additional this result in future.

• Journal of information and communication convergence engineering
• /
• 제6권1호
• /
• pp.43-46
• /
• 2008

This paper proposes an advanced test circuit for detecting the connectivity between a drum ring of laser printer and PCB. The detection circuit of charge sharing is proposed, which minimizes the influences of internal parasitic capacitances. The test circuit is composed of precharge circuit, analog comparator, level shifter. Its functional operation is verified using $0.6{\mu}m$ 3.3V/40V CMOS process parameter by HSPICE. Access time is100ns. Layout of the drum contact test circuit is $465{\mu}m\;{\times}\;117{\mu}m$.

• 한국정보통신학회논문지
• /
• 제26권3호
• /
• pp.389-395
• /
• 2022

심층 학습 기술의 발전으로 인해 분류, 객체 검출, 분할과 같은 시각 정보를 이용한 심층 학습이 다양한 분야에서 활용되고 있다. 그 중 자율 주행은 시각 데이터를 잘 활용하는 대표적인 분야 중 하나이다. 본 논문에서는 도로 위의 사람과 운송수단 객체에 대한 개별적인 깊이 값을 예측하는 망을 제안한다. 제안하는 모델은 YOLOv3와 Monodepth를 기반으로 하며, 하드 파라미터 쉐어링을 이용한 인코더와 디코더를 통해 객체 검출과 깊이 추정을 동시에 수행한다. 또한 주의 집중 기법을 사용하여 객체 검출 및 깊이 추정의 정확도를 높이고자 하였다. 깊이 추정은 단안 이미지를 통해 이루어지며, 자가 학습 방법을 통해 학습을 수행하였다.

• 한국기계가공학회지
• /
• 제15권4호
• /
• pp.67-72
• /
• 2016

Planetary gear sets are widely used in power transmission components, which have high efficiency and good durability. Their most important design parameter is the load-sharing characteristics among several planetary gears. In this study, the load sharing of planetary gears was analyzed according to the carrier pinhole position error of planetary gear sets. The loads acting on planetary gears varied with the pinhole position error of the carrier, and the load sharing of planetary gears improved as the input load increased. In addition, the load of the planetary gear with a carrier pinhole position error was relatively higher than that of other planetary gears without carrier pinhole position errors. This trend appeared more clearly in the non-floating-type carrier than the floating-type carrier.

• Structural Engineering and Mechanics
• /
• 제43권4호
• /
• pp.439-448
• /
• 2012

This paper investigates the load sharing of double circular arc helical gears considering the influence of assembly errors. Based on a load sharing formulae, a three-dimensional finite element tooth contact analysis (TCA) is implemented with commercial software package ANSYS. The finite element grid for the double circular arc gear contact model is automatically generated by using the APDL (ANSYS Parameter Design Language) embedded in ANSYS. The realistic rotation of gears is achieved by using a coupling degree-of-freedom method. Numerical simulations are carried out to exemplify the proposed approach. The distribution of contact stress and bending stress under specific loading conditions are computed and compared with those obtained from Hertz contact theory and empirical formulae to demonstrate the efficiency of the proposed load sharing calculation formulae and TCA approach.

• 전력전자학회:학술대회논문집
• /
• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
• /
• pp.176-181
• /
• 1998

The parallel inverter is popularly used because of its fault-tolerance capability, high-current outputs at constant voltages and system modularity. The conventional parallel inverter usually employs active and reactive power control of frequency and voltage droop control. However, these approaches have the disadvantages that the response time of parallel inverter control is slow against load and system parameter variation to calculate active, reactive power, frequency and voltage. This paper describes a novel control scheme for power equalization in parallel-connected inverter. The proposed scheme has a fast power balance control response, a simplicity of implementation, and inherent peak current limiting capability since it employees an instantaneous current/voltage control with output voltage and current balance and output voltage regulation. A design procedure for the proposed parallel inverter controller is presented. Furthermore, the proposed control scheme is verified through the experiment in various cases such as the system parameter variation, the control parameter variation and the nonlinear load condition.

• KIEAE Journal
• /
• 제16권3호
• /
• pp.35-46
• /
• 2016

Purpose: This paper aims to analyse the composition system of architectural elements including shape, kinetic and material elements of kinetic facades and establish the design parameter system as a common conceptual and practical knowledge sharing platform with mechanical and electrical experts. Method: This research has been conducted in a three steps. At first, 120 cases of external shading devices are analyzed and their classification criteria have been established. Secondly geometric, kinetic and material elements are categorized in a common kinetic facade coordinates system considering environmental effects and operation method, and the applicability of combination of each element are tested. Lastly core design parameters for each element have been established in a common office building installation coordinate. Result: Geometry elements are categorized into seven geometric shapes and kinetic elements is categorized into basic linear and rotational motion and combinational folding and rolling motion. The combined set of parameters for three elements composes the whole design parameters for architectural elements of kinetic façade. Design parameters of shape elements are composed of shape, installation and arrangement parameters; design parameters for kinetic elements are composed of axis and range parameters; and design parameters of material elements are composed of thermal, lighting and color parameters.