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A multi-agent based intelligent configuration method for aircraft fleet maintenance personnel

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Chinese Journal of Aeronautics 2014年第2期27卷 280-290页

作者： feng Qiang Li Songjie Sun bo School of Reliability and Systems Engineering Beihang University

A multi-agent based fleet maintenance personnel configuration method is proposed to solve the mission oriented aircraft fleet maintenance personnel configuration problem. The mainte- nance process of an aircraft fleet is analyzed first. In the process each aircraft contains multiple parts, and different parts are repaired by personnel with different majors and levels. The factors and their relationship involved in the process of maintenance are analyzed and discussed. Then the whole maintenance process is described as a 3-layer multi-agent system （MAS） model. A com- munication and reasoning strategy among the agents is put forward. A fleet maintenance personnel configuration algorithm is proposed based on contract net protocol （CNP）. Finally, a fleet of 10 aircraft is studied for verification purposes. A mission type with 3 waves of continuous dispatch is imaged. Compared with the traditional methods that can just provide configuration results, the proposed method can provide optimal maintenance strategies as well.

关键词： Aircraft Configuration Fleet Maintenance-planningMulti-agent system Personnel

Fast Parallel Algorithm for Slicing STL Based on Pipeline

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Chinese Journal of Mechanical Engineering 2016年第3期29卷 549-555页

作者： MA Xulong LIN feng YAO bo Key Laboratory for Advanced Materials Processing Technology Ministry of Education of China Tsinghua University Department of Mechanical Engineering Army Aviation Institute of PLA

In Additive Manufacturing field, the current researches of data processing mainly focus on a slicing process of large STL files or complicated CAD models. To improve the efficiency and reduce the slicing time, a parallel algorithm has great advantages. However, traditional algorithms can＇t make full use of multi-core CPU hardware resources. In the paper, a fast parallel algorithm is presented to speed up data processing. A pipeline mode is adopted to design the parallel algorithm. And the complexity of the pipeline algorithm is analyzed theoretically. To evaluate the performance of the new algorithm, effects of threads number and layers number are investigated by a serial of experiments. The experimental results show that the threads number and layers number are two remarkable factors to the speedup ratio. The tendency of speedup versus threads number reveals a positive relationship which greatly agrees with the Amdahl＇s law, and the tendency of speedup versus layers number also keeps a positive relationship agreeing with Gustafson＇s law. The new algorithm uses topological information to compute contours with a parallel method of speedup. Another parallel algorithm based on data parallel is used in experiments to show that pipeline parallel mode is more efficient. A case study at last shows a suspending performance of the new parallel algorithm. Compared with the serial slicing algorithm, the new pipeline parallel algorithm can make full use of the multi-core CPU hardware, accelerate the slicing process, and compared with the data parallel slicing algorithm, the new slicing algorithm in this paper adopts a pipeline parallel model, and a much higher speedup ratio and efficiency is achieved.

关键词： additive manufacturing STL model slicing algorithm data parallel pipeline parallel

The quantized chemical reaction resonantly driven by multiple MIR-photons:From nature to the artificial

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Nano Research 2021年第12期14卷 4367-4369页

作者： feng Zhang bo Song Lei Jiang Shanghai Key Lab of Modern Optical System School of Optical-Electrical Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai200093China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China School of Future Technology University of Chinese Academy of SciencesBeijing100049China

Biochemical reactions in vivo occur at the temperature usually lower than that in vitro,however the underlying mechanism still remains a *** by our recent studies of adenosine triphosphate(ATP)releasing photons to resonantly drive DNA replication in a quantum way,we propose a quantized chemical reaction driven by multiple mid-infrared(MIR)*** space confinement effect of enzymes on a reactant molecule increases the lifetime of excitation state of its bond vibration,providing a chance for the bond to resonantly absorb multiple *** the energy of each MIR photon is significantly lower than that of chemical bond,the resonant absorption of multiple photons can break the appointed bond of confined *** from the traditional thermochemistry and photochemistry,the quantized chemical reactions could have a high energy efficiency and ultrahigh *** addition,we also suggest a quantum driving source for our quantum-confined superfluid reactions proposed *** quantized chemical reaction resonantly driven by multiple MIR photons holds great promise to develop novel approaches for the chemical engineering in future.

关键词： quantized chemical reaction quantized bio-synthesis quantized chemical engineering multiple mid-infrared(MIR)/far-infrared(FIR)-photon driving high efficiency and ultrahigh selectivity

Evidence for self-organized criticality in unscheduled downtime data of equipment

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Journal of Systems Engineering and Electronics 2014年第6期25卷 1020-1026页

作者： bo Li feng Yang Daohan Zhou School of Astronautics and Aeronautics University of Electronic Science and Technology of China

How to reduce downtime and improve availability of the complex equipment is very important. Although the unscheduled downtime（USDT） issues of the equipment are very complex, the self-organized criticality（SOC） is the right theory to study complex systems evolution and opens up a new window to the investigation of disasters, such as the sudden failure of the equipment. Firstly,SOC theory and its validation method are introduced. Then an SOC validation method for USDT of the equipment is proposed based on the above theory. Case study is done on bottleneck equipment in a factory and corresponding data pre-process work is done. The rescaled-range（R/S） analysis method is used to calculate the Hurst exponent of USDT time-series data in order to determine the long-range correlation of USDT data on time scale;at the same time the spatial power-law characteristic of USDT time series data is studied. The result shows that the characteristics of SOC are revealed in USDT data of the equipment according to the criterion of SOC. In addition, based on the characteristics of SOC,the overall framework of the prediction method for major sudden failure of the equipment is proposed based on SOC.

关键词： unscheduled downtime(USDT) self-organized criti-cality(SOC) rescaled-range analysis(R/S) Hurst exponent

Congruence Subgroups of Hecke Groups

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Acta Mathematica Sinica,English Series 2009年第6期25卷 931-944页

作者： bo CHEN Ping Zhi yuan School of Science Chongqing Jiaotong University Chongqing 400074 P. R. China School of Mathematics South China Normal University Guangzhou 510631 P. R. China

Hecke groups are an important tool in subgroups of Hecke groups play an important rule investigating functional equations, and congruence in research of the solutions of the Dirichlet series. When q, m are two primes, congruence subgroups and the principal congruence subgroups of level m of the Hecke group H（√q） have been investigated in many papers. In this paper, we generalize these results to the case where q is a positive integer with q ≥ 5, √q ￠ Z and m is a power of an odd prime.

关键词： Hecke group principal congruence subgroup congruence subgroup

Accreting CO material onto ONe white dwarfs towards accretion-induced collapse

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Research in Astronomy and Astrophysics 2018年第3期18卷 121-128页

作者： Cheng-yuan Wu bo Wang Yunnan Observatories Chinese Academy of Sciences Kunming 650216 China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650216 China University of Chinese Academy of Sciences Beijing 100049 China Center for Astronomical Mega-Science Chinese Academy of Sciences Beijing 100012 China

The final outcomes of accreting ONe white dwarfs（ONe WDs） have been studied for several decades,but there are still some issues that are not resolved. Recently,some studies suggested that the deflagration of oxygen would occur for accreting ONe WDs with Chandrasekhar masses. In this paper,we aim to investigate whether ONe WDs can experience accretion-induced collapse（AIC） or explosions when their masses approach the Chandrasekhar limit. Employing the stellar evolution code Modules for Experiments in Stellar Astrophysics（MESA）,we simulate the longterm evolution of ONe WDs with accreting CO material. The ONe WDs undergo weak multicycle carbon flashes during the mass-accretion process,leading to mass increase of the WDs. We found that different initial WD masses and mass-accretion rates influence the evolution of central density and temperature. However,the central temperature cannot reach the explosive oxygen ignition temperature due to neutrino cooling. This work implies that the final outcome of accreting ONe WDs is electroncapture induced collapse rather than thermonuclear explosion.

关键词： stars evolution - binaries close - supernovae general - white dwarfs

Cross-correlations between 21 cm,X-ray and infrared backgrounds

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Chinese Journal of Astronomy and Astrophysics 2009年第1期9卷 73-84页

作者： Huan-yuan Shan bo Qin National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

The history of the cosmological reionization is still unclear. Two ionizing sources, stars and QSOs, are believed to play important roles during this epoch. Besides the 21 cm signals, the infrared emission from PopⅢ stars and X-ray photons from QSOs can be powerful probes of the reionization. Here we present a cross-correlation study of the 21 cm, infrared and X-ray backgrounds. The advantage of doing such crosscorrelations is that we could highlight the correlated signals and eliminate irrelevant foregrounds. We develop a shell model to describe the 21 cm signals and find that PopIII stars can provide higher 21 cm signals than QSOs. Using the ROSAT data for X-ray and AKARI data for infrared, we predict various cross power spectra analytically and discuss prospects for detecting these cross-correlation signals in future low frequency radio surveys. We find that, although these cross-correlational signals have distinct features, so far, they have been difficult to detect due to the high noise of the soft X-ray and infrared backgrounds given by ROSAT and AKARI.

关键词： cosmology theory - X-rays diffuse background -infrared stars

Carbon Dots Intensified Mechanochemiluminescence from Waterborne Polyurethanes as Tunable Force Sensing Materials

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Chinese Journal of Polymer Science 2021年第11期39卷 1403-1411页

作者： bo-Han Cao Wu Chen Wan-yuan Wei Yu-Lan Chen yuan yuan Tianjin Key Laboratory of Molecular Optoelectronic Science Department of ChemistryTianjin UniversityTianjin 300354China

1,2-Dioxetane is a well-known chemiluminescent mechanophore allowing real-time monitoring of polymer chain scission,but usually suffers from fluorescence quenching in polar ***,a series of mechanochemiluminescent waterborne polyurethanes/carbon dots composites(WPU-CDs)have been synthesized by incorporating fluorescent CDs to promote the energy transfer process in different *** resulting bulk WPUs,and in particular,their swollen films filled with a large amount of polar solvents(water and ionic liquid)emit intense *** force-induced covalent bond scission and stress distribution within these different WPU-CDs films can be sensitively ***,the ionic liquid containing films exhibited both electrical and luminescent signal changes under stretching,which offer a new kind of force sensor responsive at a broad detecting strain range and for multi-mode strain *** study is expected to stimulate new research endeavors in mechanistic insight on waterborne polyurethanes and the corresponding stretchable sensing devices.

关键词： Polymer mechanochemistry Mechanochemiluminescence Waterborne polyurethane Carbon dots Force sensing

Commentary:Indirect action pattern:A remote and cross-organ pharmacological mechanism for drug innovation

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Acta Pharmaceutica Sinica B 2022年第8期12卷 3448-3450页

作者： yuan Gao Jia-bo Wang School of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China

The development of molecular medicine has greatly promoted the research and development (R&D) of innovative drugs. However,drug design and development for those novel targets remains a big challenge with low success rates and high attrition of drug candidates1. The current methodology of new drug R&D is deeply influenced by the idea of allopathic medicine, which directly inhibits biological targets.

关键词： Cross-organ Indirect action pattern Phosphatidic acid Liver toxicity IL-6 Epididymal white adipose tissue