A5033533256- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Particle Accelerators and Free-Electron Lasers
- Power Systems and Technologies
- Smart Grid and Power Systems
- Distributed and Parallel Computing Systems
- Power Systems and Renewable Energy
- Graphite, nuclear technology, radiation studies
- Power Quality and Harmonics
- Geological Modeling and Analysis
- Data Management and Algorithms
- Turbomachinery Performance and Optimization
- Advanced Sensor and Control Systems
- Graph Theory and Algorithms
- E-commerce and Technology Innovations
- Vehicle Noise and Vibration Control
- Advanced Database Systems and Queries
- Acoustic Wave Resonator Technologies
- Electromagnetic Compatibility and Noise Suppression
- Simulation and Modeling Applications
- Educational Technology and Assessment
- Internet of Things and Social Network Interactions
- Parallel Computing and Optimization Techniques
- Safety and Risk Management
China Southern Power Grid (China)
2024
Tsinghua University
2019-2022
Shanghai Electric (China)
2020
Wuhan Institute of Technology
2019
China University of Geosciences
2012
Kyushu University
2003
Kurashiki University of Science and the Arts
2002
Tsinghua University has designed an X-band (11.424 GHz) slow-wave parallel-coupling accelerating structure, and demonstrated the high performance of over-coupled structure operating with ultrashort pulse. In this study, we redesigned a 40-ns 10 cells, tailored to specifications high-power experimental platform, provided detailed analysis results. Unexpected bead-pull results were observed during cold testing, which attribute inter-cavity coupling. To explain these results, multi-cell...
Microwave pulse compressors based on a single resonant cavity operating at polarized modes can be super compact, and corrugated structures transmit high-power, high-frequency microwave with very low loss. We present an X-band (11.424 GHz) compressor using quarter-wavelength depth corrugations working HE 1-1-14 modes. The has high-quality factor (Q <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> ) of 116000 inner diameter less than 7 cm...
A compact X-band correction cavity chain (CC) has been successfully designed, fabricated and high power tested for the Compact Linear Collider (CLIC) project. The CC consists of eight spherical cavities four polarizers, each a ${Q}_{0}$ 45 000 diameter 7 cm. can correct decaying pulse shape generated by storage without need low efficiency modulation or solution based on long delay lines. flattop output with small ripples be obtained if are matched. Experiments barrel open (BOC) were...
We present a new approach of the passive microwave pulse compression for gigawatt power generation. Two stages resonant-cavity-based compressors are cascaded and peak gain is multiplied to 12. Candidate schemes studied theoretically from perspective linear time-invariant (LTI) system. The compact <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$S$ </tex-math></inline-formula> -band (2.856 GHz) prototype...
This paper presents an intelligent operation and maintenance training system for power grid staff of substation based on augmented reality (AR), whose functions, characteristics, software configuration implementation are introduced in details. As the examination personnel, was composed system. The realistic settings re-created by effectively, which could realize "panoramic" experience, order to strengthen operability process. Based this, level skills continues make progress. While simulation...
A compact $X$-band two-stage rf pulse compression system has been successfully designed, fabricated, and tested at Tsinghua high-power test stand. The consists of a correction cavity chain, first-stage, second-stage storage cavity. chain adopts new design whose transmission loss length are reduced by half compared with the old one. detuning device is applied to so that can work in one-stage or alternatively mode. In mode, 150-ns, 70-MW flattop output, standard deviation 1.5% amplitude...
In recent years, power outages caused by emergencies have huge economic losses, and the research on resilient distribution networks has attracted much attention attention. The article introduces connotation concept of network Tells about intelligent reserve system, key role in network, mechanism adjustable load enhancing toughness grid, diagnosis operation maintenance cables their subsystems, Effect Virtual Power Plant Grid Resilience Key technologies that affect development virtual plants....
An X-band (11.424 GHz) high-power RF station is being built for Tsinghua Thomson scattering X-ray Source (TTX). The aims to feed several accelerating structures working at a high gradient of 80 MV/m. pulse compressor designed compress the from 1.5 us 100 ns and generate more than 250 MW peak power 50MW klystron. This implements resonate cavity housing HE11-mode as energy storage cavity, with quality factor Q 10⁵. detailed design high-Q well dedicate couplers this are present in work.
The X band high power test facility consists of a 11.424 GHz, 50 MW CPI klystron and ScandiNova pulse modulator at Tsinghua University has been built since Sept 2017 the output RF reached 60 with 200 ns width repetition frequency 10. will eventually be 1.5 μs. A group cylinder compressor installed. High gradient accelerating structures for research TTX tested on this facility.
Shortening the pulse length of input power is a possible approach to raise accelerating gradient limit normal conducting structures. We present novel design parallel-coupled structure that operates at ultrashort pulses. The principle shorten filling time whole by feeding cells individually so duration transmission between can be saved. An X-band (11.994 GHz) with 10 ns presented in this work. Previous high-power tests prototypes show $120\text{ }\text{ }\mathrm{MV}/\mathrm{m}$ could achieved...
An effective exploitation of distributed computing environments to improve the performance large advanced database applications requires parallel query processing techniques. This is because execution can be achieved by operations pipelining and data partitioning, as well independent subqueries. In order develop efficient services in environments, we present a optimization, dynamic scheduling algorithm, an implementation mechanism for querying objects. Our proposal has four important...
This study presents a theoretical model and an experimental investigation of piston four-stroke engine driven by compressed air. The experiments in this have used test bench to examine the output torque power performance air engine(CAE) at different working conditions. In addition, good agreement simulation results is obtained between test. show that, as supply pressure increases, increase. are maximized when intake advance angle - 70° CA, increase sustain will result power. Consequently,...
The authors propose an object-oriented programming language called WARASA for writing concurrent program on Mach-based shared memory multiprocessor computers. is extension to C/sup ++/ allow a programmer develop programming. In designing WARASA, the parallel mechanisms Mach operating system are combined with paradigm. It enables users programs easily and efficiently, because some implementation details such as locking unlocking which programmers would have know write hidden. An overview of...