A5100320280- Spacecraft and Cryogenic Technologies
- Turbomachinery Performance and Optimization
- Antenna Design and Analysis
- Fluid Dynamics Simulations and Interactions
- Rocket and propulsion systems research
- Microwave Engineering and Waveguides
- Spacecraft Design and Technology
- Antenna Design and Optimization
- Advanced Antenna and Metasurface Technologies
- Cavitation Phenomena in Pumps
- Energy Harvesting in Wireless Networks
- Cyclone Separators and Fluid Dynamics
- Radar Systems and Signal Processing
- Inertial Sensor and Navigation
- Fluid Dynamics and Heat Transfer
- Indoor and Outdoor Localization Technologies
- Aerospace Engineering and Energy Systems
- Refrigeration and Air Conditioning Technologies
- GNSS positioning and interference
- Icing and De-icing Technologies
- Astro and Planetary Science
- Smart Materials for Construction
- Fluid Dynamics and Turbulent Flows
- Wireless Body Area Networks
- Space Satellite Systems and Control
Institute of Engineering Thermophysics
2024
Chinese Academy of Sciences
2022-2024
China Academy of Space Technology
2022-2024
Shandong University
2024
Harbin Engineering University
2021-2024
University of Chinese Academy of Sciences
2013-2024
Shandong Academy of Sciences
2022
Xidian University
2022
Nanjing University of Aeronautics and Astronautics
2022
Qingdao University
2019
This contribution presents a novel design of circularly polarized (CP) array antenna composed the Chinese character-shaped artistic patches: Zhong and Guo. Namely, CP Zhong-shaped patch Guo-shaped join together via feeding network to form two-element array. is country name China printed in boldfaced SimHei font. Attributed its nature, this first that breaks principles array, wherein, first, nonidentical radiating elements are used, second, nonrotated excited with quadrature phases. The...
Unlike the traditional feature-based methods, we propose using motion vectors (MVs) from video streams as inputs for visual navigation. Although MVs are very noisy and with low spatial resolution, do possess high temporal resolution which means it is possible to merge different frames improve signal quality. Homography filtering MV thresholding proposed further quality so that can establish plane observations MVs. We an extended Kalman filter (EKF) based approach simultaneously track robot...
摘要: 低压涡轮是航空发动机的重要部件,其效率变化对发动机推(功)重比、耗油率有显著的影响,因此,为提高航空发动机性能的研发,有必要对低压涡轮内部流动及换热特性进行全面细致地研究。采用气热耦合计算流体动力学(Computational fluid dynamics, CFD)计算方法,对某航空发动机低压涡轮高空低雷诺数下的流动特性进行深入研究,分析雷诺数对低压涡轮效率、流动特性的影响。结果表明随着雷诺数(Re<2×105)的增加,附面层分离损失不断降低使得低压涡轮效率单调增加。
This paper introduces a Chinese character-shaped circularly polarized (CP) patch antenna: Zhong-shaped printed in SimHei font. In order to enhance the broadside gain and front-to-back radiation, rectangular metal box is included as antenna reflector. The exhibits maximum of 8.3 dBic, axial-ratio (3-dB) bandwidth 6.4%, return-loss (10-dB) 20.4%, (7-dB) 17%. More importantly, achieved operating covers 14 channels IEEE 801.11 for 2.4-GHz wireless local area network (WLAN).
Abstract The air storage pressure of compressed energy system gradually decreases during the process release, and a reasonable distribution method for turbine is required to make work efficiently in this process. In paper, based on single nozzle governing method, effect variation full circumferential relative stator installation angle performance improvement under rated output condition investigated. It shown that specific variable can be improved by up 6.3 % design 15.7 throttle base 10.0...
Second-order perturbation solutions of profiles bubbles suspended in liquid and liquid–gas interfaces when all sinks the bottom with different accelerations are derived. Six procedures developed based on these solutions, they divided into two types. One type takes coordinates end points as input, other volume or gas input. Numerical simulations performed Volume Fluid method, numerical results good agreement predictions procedures. The greater acceleration, flatter bubble until to bottom....
This paper introduces a Chinese character-shaped patch antenna array: Zhong-Guo array. A study on element spacing of character shaped array was conducted. When the optimum is identified as 90 mm (0.75λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> at 2.5 GHz), exhibits 3-dB axial-ratio bandwidth 7.3% and 9-dB gain 7.4%, which sufficiently covers wireless local area network (WLAN) 2.4-GHz band. More importantly, interesting results were...
A compact and simple ultra-wideband microstrip-fed planar antenna with double bandstop characteristic is presented. The consists of a rectangular monopole two W-shaped slots inserted into the radiating patch truncated ground plane. By using slot defected structure (DGS) in feedline, stopband 800 MHz (from 5.1 to 5.9 GHz) for band rejection wireless local area network (WLAN) achieved. To obtain other 3.7-4.4 GHz), same shaped etched monopole. Moreover, stopbands can be controlled by adjusting...