检索结果-南通市图书馆

Recent TCP(Tidal Current Power) projects in Korea

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2010年第1期53卷 57-61页

作者： Chul hee JO kang hee lee Yu Ho RHO School of Engineering Inha University253Yonghyun-DongNam-GuIncheon 402-751Republic of Korea Graduate School Department.of Naval Architecture & Ocean EngineeringInha University253Yonghyun-DongNam-GuIncheon 402-751Republic of Korea

Having strong current on the west coast with up to 10 m tidal range in Korea,there are many suitable and applicable locations for TCP(Tidal Current Power) application in *** only the west coast,but also the south west regions having narrow channels between islands creating fast ocean stream are suitable for *** first TCP application in Korea is 1 MW helical VAT(Vertical Axis Turbine) device installed in Wooldolmog area in *** first HAT(Horizontal Axis Turbine) TCP device of 25 KW was developed and installed in cooling water weir of Samchonpo power plant in ***,a 100 kW prototype HAT TCP device is being planned to be installed in Daebang strait in *** big project would be Inchon TCP farm of 200 MW on the west coast in *** consortium of 5 members was formed in April,*** site will be the largest TCP site in the *** paper describes recent TCP projects in Korea with background and environmental conditions of the projects.

关键词： TCP(Tidal Current Power) ocean energy renewable energy clean energy HAT(Horizontal Axis Turbine) VAT(Vertical Axis Turbine)

Micro-accelerometer Based on Vertically Movable Gate Field Effect Transistor

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2015年第3期7卷 282-290页

作者： Heung Seok kang kang-hee lee Dong-Youk Yang Byoung hee You In-Hyouk Song Korea Atomic Energy Research Institute LOGTECH Co. Ltd 914 Gumgang Hightech Valley 1st Department of Engineering Technology Texas State University601 University Dr. San Marcos TX 78666 USA

A vertically movable gate field effect transistor(VMGFET) is proposed and demonstrated for a microaccelerometer application. The VMGFET using air gap as an insulator layer allows the gate to move on the substrate vertically by external forces. Finite element analysis is used to simulate mechanical behaviors of the designed structure. For the simulation, the ground acceleration spectrum of the 1952 Kern County Earthquake is employed to investigate the structural integrity of the sensor in vibration. Based on the simulation, a prototype VMGFET accelerometer is fabricated from silicon on insulator wafer. According to current–voltage characteristics of the prototype VMGFET, the threshold voltage is measured to be 2.32 V, which determines the effective charge density and the mutual transconductance of1.545910-8C cm-2and 6.59 m A V-1, respectively. The device sensitivity is 9.36–9.42 m V g-1in the low frequency,and the first natural frequency is found to be 1230 Hz. The profile smoothness of the sensed signal is in 3 d B range up to1 k Hz.

关键词： MEMS Micro-accelerometer Suspended gate FET Vertically movable gate FET VMGFET

THE GREENING OF AFFORDABLE HOUSING THROUGH PUBLIC AND PRIVATE PARTNERSHIPS: DEVELOPMENT OF A MODEL FOR GREEN AFFORDABLE HOUSING

在线全文

学校读者我要写书评

暂无评论

Journal of Green Building 2014年第1期9卷 93-112页

作者： Yong Han Ahn Yuhong Wang kang hee lee Myung Hwa Jeon Department of Construction Management Western Carolina University Department of Civil and Environmental Engineering Hong Kong Polytechnic University Department of Architectural Engineering Andong National University Technology Development Department POSCO A&C Co.Ltd.

The trend towards affordable, green housing highlights the need for a Green Affordable Housing (GAH) model that produces durable dwellings that are not significantly more expensive to build, cheaper to operate, healthier for their occupants, and more environmentally sound. The model should also reduce the risk of poverty for those with low and moderate incomes, be close to public transportation, and support a neighborhood that is healthy, walkable and connected to the broader community and natural environment. This case study utilized detailed interviews with occupants, town officials, a developer, and a design builder to explore how green building strategies could be applied in real-world communities with the help of a Community Development Block Grant (CDBG) from the U.S. Department of Housing and Urban Development (HUD) and contributions from other funding bodies. Focusing on the Roanoke and lee Street housing project in Blacksburg, Virginia (VA), this study demonstrated how green building strategies can be integrated into affordable housing with help from public programs and incentives to provide houses that are more durable, no more expensive to build, cheaper to operate, healthier, more environmentally sound and less risky for their occupants. The new framework includes ways to deal with neighborhood issues such as the deterioration of housing stock and infrastructure to support the creation of a vital and healthy neighborhood with improved public services and community spirit, as well as providing an integrated design process framework that enables stakeholders to work together to achieve the goal of building green and affordable housing.

关键词： affordable housing green building public and private partnership integrated design process

Tidal Current Energy Resource Assessment Technique and Procedure Applied in Western Coastal Region, South Korea

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2015年第4期9卷 358-366页

作者： Chul hee Jo Su Jin Hwang kang hee lee Department of Naval Architecture and Ocean Engineering Inha University Incheon 402-751 South Korea

After the nuclear power plant accident in Japan, Korean government has set the national goal to produce the electricity by renewable energy sources up to 11% by 2035 which is not easy to achieve without ocean energy development. The demand on the clean energy supply has been increased recently and there are many renewable energy development projects and plans announced worldwide. The ocean energy can be produced from tidal current, wave, tidal barrage and ocean thermal sources. The first step is to estimate the resource assessment for each energy source. There are several assessment methods introduced from IEA （International Energy Agency）, IRENA （International Renewable Energy Agency）, NREL （National Renewable Energy Laboratory）, EU ERENE （European Community for Renewable Energy）, Bonn University, DLR （German Aerospace Center）, etc.. Even these known methods have some sort of similarity; there are different definitions and classifications among them. In this paper, the four-step energy potentials are defined and introduced as theoretical, geographical, technical and market potentials. The theories for each step are presented for ocean energies together with clear definitions. As the tidal current energy research and development are active in Korea having very strong tidal current speed along the west and south coastal regions, the detail procedure for each step of energy potential assessment is introduced for tidal current energy. The paper will illustrate the case study of tidal current power assessment in western coastal region, South Korea with highlighting the key aspects in determining the resource potentials.

关键词： TCP (tidal current power) resource assessment API (averaged power intercepted) tidal current farm planning.

Introduction of Facility and Technology for Fuel Assembly Endurance, Vibration and Hydraulic Test

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Introduction of Facility and Technology for Fuel Assembly En...

Aligned Ion Conduction Pathway of Polyrotaxane‑Based Electrolyte with Dispersed Hydrophobic Chains for Solid‑State Lithium–Oxygen Batteries

The Fifth China-Korea Workshop on Nuclear Reactor Thermal Hydraulics

作者： Chang-Hwan Shin kang-hee lee Young-Ho lee Bok-Deuk Kim Se-Young Chun Dong-Seok Oh Nam-Gyu Park kang-Hoon Kim Jung-Min Suh Korea Atomic Energy Research Institute Korea Electric Power Cooperation-Nuclear Fuel Daedeok-daero 989-111 Yuseong-gu Daejeon KOREA

For a development procedure of an LWR fuel assembly, the accomplishment of a performance target must be verified through out-of-pile tests of a fuel assembly and its components. KAERI constructed a test facility to measure and analyze the pressure loss, the lift force, the flow induced vibration and the fretting wears as well as to verify the compatibility of difference fuel assemblies in a transient reactor core. This test facility of the fuel assemblies is named PLUTO from Performance Test Facility for Fuel Assembly Hydraulics and Vibrations. The design pressure and temperature of the PLUTO are 4 MPa, and 250 oC, and the maximum operating conditions are 3.5 MPa and 210 oC, respectively. The primary circulation loop consists of the main circulation pumps, two test sections, and an expansion tank, a main heat exchanger and auxiliary systems. Flow in the loop is provided by 4 non-seal canned motor pumps in a parallel arrangement, and maximum flow rate is 1400 m3/hr. This paper briefly introduces the PLUTO facility and reports the comprehensive verification results.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 169-186页

作者： Bitgaram Kim Myeong‑Chang Sung Gwang‑hee lee Byoungjoon Hwang Sojung Seo Ji‑Hun Seo Dong‑Wan Kim Department of Materials Science and Engineering Korea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea School of Civil Environmental and Architectural EngineeringKorea University145 Anam‑RoSeongbuk‑GuSeoul 02841Republic of Korea Materials Science and Chemical Engineering Center Institute for Advanced Engineering(IAE)Yongin 17180Republic of Korea

A critical challenge hindering the practical application of lithium–oxygen batteries(LOBs)is the inevitable problems associated with liquid electrolytes,such as evaporation and safety *** study addresses these problems by proposing a modified polyrotaxane(mPR)-based solid polymer electrolyte(SPE)design that simultaneously mitigates solvent-related problems and improves ***-SPE exhibits high ion conductivity(2.8×10^(−3)S cm^(−1)at 25℃)through aligned ion conduction pathways and provides electrode protection ability through hydrophobic chain *** this mPR-SPE into solid-state LOBs resulted in stable potentials over 300 *** situ Raman spectroscopy reveals the presence of an LiO_(2)intermediate alongside Li_(2)O_(2)during oxygen *** situ X-ray diffraction confirm the ability of the SPE to hinder the permeation of oxygen and moisture,as demonstrated by the air permeability *** present study suggests that maintaining a low residual solvent while achieving high ionic conductivity is crucial for restricting the sub-reactions of solid-state LOBs.

关键词： Solid polymer electrolyte Lithium-oxygen batteries Polyrotaxane ion conductivity Hydrophobic chain

High-throughput volumetric adaptive optical imaging using compressed time-reversal matrix

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第1期11卷 114-126页

作者： Hojun lee Seokchan Yoon Pascal Loohuis Jin hee Hong Sungsam kang Wonshik Choi Center for Molecular Spectroscopy and Dynamics Institute for Basic ScienceSeoul 02841Korea Department of Physics Korea UniversitySeoul 02841Korea Department of Applied Mathematics University of TwenteDrienerlolaan 57522 NB EnschedeNetherlands Achmea Holding BV Handelsweg 23707 NH ZeistNetherlands

Deep-tissue optical imaging suffers from the reduction of resolving power due to tissue-induced optical aberrations and multiple scattering *** matrix approaches recording the maps of backscattered waves for all the possible orthogonal input channels have provided formidable solutions for removing severe aberrations and recovering the ideal diffraction-limited spatial resolution without relying on fluorescence labeling and guide ***,measuring the full input–output response of the tissue specimen is time-consuming,making the real-time image acquisition ***,we present the use of a time-reversal matrix,instead of the reflection matrix,for fast high-resolution volumetric imaging of a mouse *** time-reversal matrix reduces two-way problem to one-way problem,which effectively relieves the requirement for the coverage of input *** a newly developed aberration correction algorithm designed for the time-reversal matrix,we demonstrated the correction of complex aberrations using as small as 2%of the complete basis while maintaining the image reconstruction fidelity comparable to the fully sampled reflection *** to nearly 100-fold reduction in the matrix recording time,we could achieve real-time aberration-correction imaging for a field of view of 40×40µm^(2)(176×176 pixels)at a frame rate of 80 ***,we demonstrated high-throughput volumetric adaptive optical imaging of a mouse brain by recording a volume of 128×128×125µm^(3)(568×568×125 voxels)in 3.58 s,correcting tissue aberrations at each and every 1µm depth section,and visualizing myelinated axons with a lateral resolution of 0.45µm and an axial resolution of 2µm.

关键词： matrix correction recording

Friction Behavior of Magnetorheological Fluids with Different Material Types and Magnetic Field Strength

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2016年第1期29卷 84-90页

作者： ZHANG Peng lee Kwang-hee lee Chul-hee Department of Mechanical Engineering Inha University

Magnetorheological （MR） fluid is a type of a smart material that can control its mechanical properties under a magnetic field. Iron particles in MR fluid form chain structures in the direction of an applied magnetic field, which is known as MR effect, resulting in variation of stiffness, shear modulus, damping and tribological characteristics of MR fluid. As MR effect depends on the density of particles in the fluid or the strength of a magnetic field, the experiments are conducted to evaluate the friction property under reciprocating motion by changing the types of MR fluid and the strength of a magnetic field. The material of aluminum, brass, and steel are chosen for specimen as they are the most common material in mechanical applications. The surfaces of specimen are also observed by optical microscope before and after experiments to compare the surfaces with test conditions. The comparing results show that the friction coefficient increases as the strength of a magnetic field increases in regardless of types of MR fluid or the material. Also the density of particle in MR fluid affects the friction characteristic. The results from this research can be used to improve the performance of mechanical applications using MR fluid.

关键词： Magnetorheological (MR) fluid friction characteristics smart material magnetic field

2D material inorganic liquid crystals for tunable deep UV light modulation

在线全文

学校读者我要写书评

暂无评论

National Science Review 2022年第12期9卷 62-63页

作者： Young hee lee Department of Energy Science and Department of Physics Sungkyunkwan University IBS Center for Integrated Nanostructure Physics Institute for Basic Science Sungkyunkwan University

Modulation of light refers to the modulation of electromagnetic radiation in the optical region including visible light as well as ultraviolet and infrared radiation,in which the amplitude (and therefore the intensity),phase,frequency or polarization of the radiated oscillations can be changed [1].Optical modulator devices are widely used in industry,as represented by liquid crystal optical modulators having an annual global market worth of over US$100 ***,

关键词：