http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Maximization of Total Throughput and Device Lifetime With Non-Linear Battery Properties
Shin, Hun Min,Park, Seok-Hwan,Jung, Jaehoon,Lee, Sunho,Lee, Inkyu IEEE 2017 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.16 No.12
<P>This paper considers the maximization of total throughput and device lifetime for point-to-point multiple-input multiple-output communication systems, where a transmission node has a battery which exhibits non-linear battery discharge behaviors. We adopt a battery model called Peukert’s law to render the non-linear battery characteristics and formulate the battery constraint from Peukert’s law. Then, we prove that the total throughput is a strictly concave function in terms of the battery lifetime under the battery constraint. Also, we derive the optimality conditions for the total throughput maximization and device lifetime maximization problems from the strict concavity, and compute the optimal solutions by a bi-section method. Furthermore, we provide a solution based on asymptotic analysis for the case, where the eigenvalue distribution of the channel matrix is not available. In the simulation section, we conduct accurate battery discharge simulations to validate this paper. We confirm that the analysis matches well with the battery simulations, and the derived optimal scheme outperforms the baseline schemes, which neglect the non-linear battery discharge properties. Also, the proposed solution based on asymptotic analysis is shown to have almost the same performance compared with the optimal solution.</P>
최인규(Inkyu Choi),김종안(Jongan Kim),우주희(Joohee Woo),변승현(Seunghyun Byun),신만수(Mansu Shin) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
The power plants have been large-scaled. The characteristics of the protection systems of large scale power plants are much different from those of small or medium scale power plants for such reasons as that the intermediate pressure steam turbine is used instead of the high pressure steam turbine during startup period. While the protection system of large scale power plant can reduce the start-up time compared to that of small or medium scale power plant, the control algorithm and operation method are very complicated. This paper reviews the turbine protection systems of large scale power plants for stable retrofit of turbine control system.
Hun Min Shin,Sang-Rim Lee,Han-Bae Kong,Inkyu Lee IEEE 2015 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.14 No.11
<P>In this paper, we consider K-user multiple-input single-output interference channels with a cognitive relay. Assuming that data of all transmitters and channel state information are known at the cognitive relay, we design a linear precoder for the cognitive relay with the aim of maximizing the sum-rate without changing the transmitter operations at all transmitters. We first define the receiver set as a set which contains a part of the receivers, and then introduce a performance metric called 'partial signal-to-interference-plus-noise ratio' (PSINR) based on the receiver set. Then, we can obtain a precoder at the cognitive relay by solving the PSINR maximization problem. The optimal receiver set which yields the maximum sum-rate can be identified by checking all possible receiver sets. Since this exhaustive search has prohibitive complexity, we develop a low complexity set search method by utilizing the properties of the optimal receiver set. Combining the PSINR maximization problem and the low complexity search method, we finally propose a precoder design scheme for the sum-rate maximization. Numerical simulation results confirm that the proposed scheme shows performance close to the projected gradient method with much reduced complexity.</P>
이인규 ( Rhee Inkyu ),신근옥 ( Shin Geun Ock ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
This paper attempts to manipulate brittle shear failure in reinforced concrete deep beam which has shear span-to-depth ratio, a/d=2.0 with aid of lattice model. Timoshenko beam type of lattice model was basically used for reinforcing steel in order to incorporate the dowel action. Truss type of lattice model was applied for plain concrete domain using union-jack type of structured mesh. Mesh sensitivity analyses focused with varying different level of unit union-jack block discretization.
Hun-Young Shin,Seok-Hwan Park,Haewook Park,Inkyu Lee IEEE 2012 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.11 No.3
<P>In this letter, we consider a new interference alignment (IA) strategy for single-input single-output interference broadcast channels with constant channel coefficients. First, we show that 1.5 degrees of freedom (DOF) is achievable for 3-cell case by utilizing asymmetric complex signaling (AC) and multiuser diversity without symbol extension. It is also investigated that the achievable DOF varies with the user scaling condition and ω(√(SNR)) is required for guaranteeing the DOF of 1.5. To improve the sum-rate performance, user scheduling algorithms combined with the beamforming techniques are suggested which outperform the conventional IA schemes. After introducing an exhaustive scheduling algorithm which shows optimal sum-rate, a simplified scheduling method is also proposed which reduces both scheduling metric computations and the search size.</P>