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The latest progress of Five-hundred-meter Aperture Spherical radio Telescope

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Science China(Technological Sciences) 2022年第4期65卷 987-988页

作者： JIANG Peng yao rui CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

After nearly two years of operation,FAST has acquired abundant scientific achievements,and more than one hundred high-quality papers have been published based on the FAST data[1–6],which have produced far-reaching scientific achievements in ***,FAST data plays an important role in constraining the physical origin of fast radio *** corresponding results have been published in the journal“Nature”.

关键词： journal FAST hundred

Accuracy Analysis of Stewart Platform Based on Interval Analysis Method

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Chinese Journal of Mechanical Engineering 2013年第1期26卷 29-34页

作者： yao rui ZHU Wenbai HUANG Peng National Astronomical Observatories Chinese Academy of Sciences Department of Precision Instruments and Mechanology Tsinghua University

A Stewart platform is introduced in thc 500 m aperture spherical radio telescope（FAST） as an accuracy adjustable mechanism for teed receivers. Accuracy analysis is the basis of accuracy design. However, a rapid and effective accuracy analysis method for parallel manipulator is still needed. In order to enhance solution efficiency, an interval analysis method（lA method） is introduced to solve the terminal error bound of the Stewart platform with detailed solution path. Taking a terminal pose of the Stewart platform in FAST as an example, the terminal error is solved by the Monte Carlo method（MC method） by 4 980 s, the stochastic mathematical method（SM method） by 0.078 s, and the IA method by 2.203 s. Compared with MC method, the terminal error by SM method leads a 20% underestimate while the IA method can envelop the real error bound of the Stewart platform. This indicates that the IA method outperforms the other two methods by providing quick calculations and enveloping the real error bound of the Stewart platform. According to the given structural error of the dimension parameters of the Stewart platform, the IA method gives a maximum position error of 19.91 mm and maximum orientation error of 0.534°, which suggests that the IA method can be used for accuracy design of the Stewart platfbnn in FAST. The 1A method presented is a rapid and effective accuracy analysis method for Stewart platform.

关键词： Stewart platform accuracy interval analysis radio telescope

Pose optimization of the FAST feed support system based on the new feed cabin mechanism

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Science China(Physics,Mechanics & Astronomy) 2023年第3期66卷 178-187页

作者： Jianing Yin Peng Jiang rui yao CAS Key Laboratory of FAST National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

The Five-hundred-meter Aperture Spherical radio Telescope(FAST) is the largest and most sensitive single-dish radio telescope in the world and has made many important scientific achievements in a few years. Given the enormous scientific research potential of the Milky Way center, it is necessary to enhance the observation zenith angle as close to the Milky Way center as possible. In this regard, a new mechanism for the feed cabin is proposed with cables and sliders, which is lighter in weight and larger in the workspace. This paper will introduce this new feed cabin and the whole feed support system and establish their mechanical models to optimize the relevant control parameters, making FAST achieve an observation zenith angle of at least 50°with satisfying the required constraints. It indicates that the new mechanism designed by the FAST team can be used for the FAST upgrade and the future FAST array project.

关键词： radio telescope cable-driven parallel robot mechanism optimization

Multi-objective evolutionary design of selective triple modular redundancy systems against SEUs

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Chinese Journal of Aeronautics 2015年第3期28卷 804-813页

作者： yao rui Chen Qinqin Li Zengwu Sun Yanmei College of Automation and Engineering Nanjing University of Aeronautics and Astronautics

Abstract To improve the reliability of spaceborne electronic systems, a fault-tolerant strategy of selective triple modular redundancy （STMR） based on multi-objective optimization and evolvable hardware （EHW） against single-event upsets （SEUs） for circuits implemented on field pro- grammable gate arrays （FPGAs） based on static random access memory （SRAM） is presented in this paper. Various topologies of circuit with the same functionality are evolved using EHW firstly. Then the SEU-sensitive gates of each circuit are identified using signal probabilities of all the lines in it, and each circuit is hardened against SEUs by selectively applying triple modular redundancy （TMR） to these SEU-sensitive gates. Afterward, each circuit hardened has been evaluated by SEU Simulation, and the multi-objective optimization technology is introduced to optimize the area overhead and the number of functional errors of all the circuits, The proposed fault-tolerant strategy is tested on four circuits from microelectronics center of North Carolina （MCNC） benchmark suite. The experimental results show that it can generate innovative trade-off solutions to compromise between hardware resource consumption and system reliability. The maximum savings in the area overhead of the STMR circuit over the full TMR design is 58% with the same SEU immunity.

关键词： Evolvable hardware Field programmable gatearray Multi-objective approachSelective triple modularredundancy Single event upset

An approximately analytical solution method for the cable-driven parallel robot in FAST

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Research in Astronomy and Astrophysics 2021年第2期21卷 169-179页

作者： Jia-Ning Yin Peng Jiang rui yao National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

The Five-hundred-meter Aperture Spherical radio Telescope(FAST)is the largest single-dish aperture telescope with a cable-driven parallel robot introduced to achieve the highest sensitivity in the ***,to realize the high-precision,mechanical equations of such a robot are always complicated,so that it is difficult to achieve real-time control by the traditional iterative *** this regard,this paper proposes an approximately analytical solution method,which uses the approximately linear relationship between the main parameters of FAST to bypass some *** the coefficients of the relationship extracted,static or quasi-static mechanical equations can be analytically *** this paper’s example,this method saves at least 90%of the calculating time and the calculated values are consistent with the experimental *** such huge efficiency improvements,real-time and high-precision control of the FAST will no longer be difficult ***,all the work in this paper is expected to be used in the FAST.

关键词： telescopes-methods analytical-instrumentation miscellaneous

Recent advances of nanoporous metal-based catalyst: synthesis, application and perspectives

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Journal of Iron and Steel Research International 2019年第8期26卷 779-795页

作者： rui-qi yao Xing-you Lang Qing Jiang Key Laboratory of Automobile Materials (Ministry of Education) School of Materials Science and Engineering Jilin University Changchun 130022 Jilin China

Nanoporous metal-based catalysts with the specific bicontinuous interconnected ligaments/pores network exhibit highly active performances in application for energy conversion, which represent a broader trend in the design of catalyst materials. These promising nanomaterials commendably provide highly conductive porous morphologies with reduced contact resistances, large electrochemical surface areas with enhanced catalytic efficiency, and controllable synthesis for regulating the performances. Thus, we highlight recent designs of nanoporous metals, alloys, transition metal compounds and hierarchical structures mainly employed in catalysis process. We discuss applied strategies to utilize characteristics of nanoporous metals in the energetic field of catalytic reactions. Moreover, development and evolution of novel controllable synthesis methods are applied in preparation of nanoporous non-noble metals and transition metal compounds. Finally, we present some outlooks and perspectives on the nanoporous metal catalyst and suggest ways for achieving alternative materials in catalysis applications.

关键词： Nanoporous metal Electrochemical catalyst Hierarchical structure Metal-based compound Structure-activity correlation

Degradation of refractory pollutants by hydrodynamic cavitation: Key parameters to degradation rates

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Journal of Hydrodynamics 2019年第4期31卷 848-856页

作者： Zhi-yong Dong Kai Zhang rui-hao yao College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310023 China

Degradations of refractory pollutants by hydrodynamic cavitation were experimentally carried out in a self-developed hydrodynamic cavitation reactor with Venturi tubes, multi-orifice plates and their combinations. Effects of hydraulic elements of cavitation due to the Venturi tube on degradation of refractory hydrophobic pollutant were studied, and an optimal throat length corresponding to the maximum degradation rate was obtained. Effects of cavitation due to number, size and distribution of orifice for the multi-orifice plates on degradation of refractory hydrophilic pollutant were investigated, and comparisons and analyses were made. Effects of cavitation due to different combinations of the Venturi tubes with the triangular multi-orifice plates on degradation of hydrophilic and hydrophobic mixtures were studied, and an appropriate combination was determined. Also, effects of cavitation duration, pH value and initial concentration on the refractory pollutants were explored.

关键词： Hydrodynamic cavitation Venturi tube multi-orifice plate refractory pollutant combination effect

A self-healing strategy with fault-cell reutilization of bio-inspired hardware

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Chinese Journal of Aeronautics 2019年第7期32卷 1673-1683页

作者： Zhai ZHANG yao QIU Xiaoliang YUAN rui yao Yan CHEN Youren WANG College of Automation Engineering Nanjing University of Aeronautics and Astronautics

The self-healing strategy is a key component in designing the bio-inspired embryonics circuit with the structure of cell arrays. However, the existing self-healing strategies of embryonics circuits mainly focus on permanent faults inside the modules of cells such as the function module and the configuration register, while little attention is paid to transient faults. From the point of view of obtaining high efficiency of hardware utilization, it would be a huge waste of hardware resources by permanent elimination when a cell only suffers a transient fault which can be repaired by a configuration mechanism. A new self-healing strategy, the Fault-Cell Reutilization Self-healing Strategy(FCRSS) which presents a method for reusing transient fault cells, is proposed in this paper. The circuit structures of all the modules in the cells are described in detail. In the new strategy, two processes of elimination and reconfiguration are combined. Within the process of fault-cell elimination, cells with transient faults in the embryonics circuit array could be reused simultaneously to replace the functions of the cells on their left side in the same row. Therefore, transient fault-cells in a transparent state can be reconfigured to realize the fault-cell reutilization. Finally,a circuit simulation, resource consumption, a reliability analysis and a detailed normalization analysis are presented. The FCRSS can improve the hardware utilization rate and system reliability at the expense of a small amount of hardware resources and reconfiguration time. Following the conclusion, the method of determining the optimal self-healing strategy is presented according to the environmental conditions.

关键词： Bio-inspired hardware Embryonics Fault-cell reutilization Reliability analysis Self-healing strategy Transient fault

Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking

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World Journal of Psychiatry 2025年第1期15卷 145-152页

作者： rui-yao Wu Lin-Feng Ge Bao-Liang Zhong Department of Psychiatry The Affiliated Wuhan Mental Health CenterTongji Medical College of Huazhong University of Science&TechnologyWuhan 430012Hubei ProvinceChina Department of Psychiatry Wuhan Mental Health CenterWuhan 430012Hubei ProvinceChina

BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical *** To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these *** A total of 2507 Chinese university students were recruited via snowball *** students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in ***-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also *** The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with ***,only 3.28%of the students with PTSSs reported seeking help from mental health *** the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological *** Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 *** delivery of mental health services online or via telephone is a promising approach to address these unmet needs.

关键词： Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China