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npj Computational Materials 2021年第1期7卷 659-670页

作者： Achintha Ihalage yang hao School of Electronic Engineering and Computer Science Queen Mary University of LondonLondonUK

Compositional disorder induces myriad captivating phenomena in ***-driven discovery of perovskite solid solutions has been a great challenge due to the analytical complexity introduced by ***,we demonstrate that an unsupervised deep learning strategy can find fingerprints of disordered materials that embed perovskite formability and underlying crystal structure information by learning only from the chemical composition,manifested in (A_(1-x)A'_(x))BO_(3) and A(B_(1-x)B'_(x))O_(3) *** phenomenon can be capitalized to predict the crystal symmetry of experimental compositions,outperforming several supervised machine learning(ML)*** educated nature of material fingerprints has led to the conception of analogical materials discovery that facilitates inverse exploration of promising perovskites based on similarity investigation with known *** search space of unstudied perovskites is screened from~600,000 feasible compounds using experimental data powered ML models and automated web mining tools at a 94%success *** concept further provides insights on possible phase transitions and computational modelling of complex *** proposed quantitative analysis of materials analogies is expected to bridge the gap between the existing materials literature and the undiscovered terrain.

关键词： perovskite crystal disordered

Probabilistic fault recoverability analysis of flight control process

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Chinese Journal of Aeronautics 2021年第2期34卷 529-538页

作者： Yue PENG hao yang Bin JIANG College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Probabilistic Fault Recoverability(FR) property reveals the capability of a system to accommodate faults under admissible input energy constraints in the sense of satisfactory probability. Motivated by the idea of probabilistic control methods, a class of admissible probability density functions is designed for detailed description of fault parameters, under which several probabilistic FR conditions are established. This significantly enlarges the range of recoverable faults obtained from the deterministic FR analysis. The tradeoffs between the risk of performance degradation and this increased recoverability margin are exactly achieved by allowing a small risk of FR violation. This paper analyzes the probability FR of dynamic systems with switching and interconnection characteristics, and applies the new results to several aircraft models including single longitudinal aircraft dynamic, Highly Maneuverable Technology(HiMAT) vehicle and meta aircraft. Simulation results show the efficiency of the proposed methods based on the comparison between deterministic and probabilistic cases.

关键词： Fault-tolerant control Flight control process Interconnected system Probabilistic fault recoverability Switched system

Fault tolerant attitude control of under-actuated spacecraft:Theory and experiment

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Chinese Journal of Aeronautics 2023年第5期36卷 465-474页

作者： Zejun ZHANG hao yang Bin JIANG College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

This paper investigates fault tolerant attitude control theory and experiment for underactuated spacecraft with one reaction wheel completely broken and two others suffering actuator faults of partial loss of effectiveness or bias.A non-smooth robust adaptive fault tolerant control law is proposed under the zero-momentum and input saturation *** shows that the available reaction wheels need to produce sufficient control torque for the fault *** a new control method is implemented in a semi-physical simulation system of an air-bearing *** results show the effectiveness of the proposed method in spacecraft practical engineering.

关键词： Actuator fault Air-bearing platform Fault tolerant control Semi-physical experiment Under-actuated spacecraft

Middle Permian palaeobiogeography study in East Kunlun,A'nyêmaqên and Bayan Har

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Science China Earth Sciences 2004年第12期47卷 1120-1126页

作者： WANG Yongbiao yang hao Faculty of Earth Science China University of Geosciences Wuhan 430074 China Faculty of Earth Science China University of Geosciences Wuhan 430074 China

Three regions can easily be identified in the study area according to the Middle Permian palaeobiogeographic distribution of biota, they are the southern slope of East Kunlun, A’nyêmaqên and Bayan Har. Biotic constitution and ecology in the southern slope of East Kunlun and Bayan Har are very similar. Both the diversity and abundance of organisms in these two areas are very high and reefs are widely developed. However, biotic diversity and abundance in A’nyêmaqên which is between the above two areas are obviously low. Differentiation of palaeo- biogeographic distribution in these areas should be due to the baring of A’nyêmaqên ocean in the time of Middle Permian. Middle Permian radiolarian chert and thick abyssal red ooze are widely spread in A’nyêmaqên, implying that the A’nyêmaqên ocean had a great scale in size. Vast scale of deep ocean basin became an impassable gulf for some of the benthos, and as a result, only part of the organisms could have the chance to get to the isolated islands situated in ocean basin. Small living space and hard conditions in the islands further limited the abundance and diversity of biota. Tectonic background reflected by the geochemical study of basalt in the three areas is coupling well enough with the palaeobiogeographic division.

关键词： palaeobiogeography, Middle Permian, East Kunlun, A'nyêmaqên, Bayan Har.

Continuous-time Distributed Heavy-ball Algorithm for Distributed Convex Optimization over Undirected and Directed Graphs

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Machine Intelligence Research 2022年第1期19卷 75-88页

作者： hao-Ran yang Wei Ni School of Science Nanchang UniversityNanchang 330031China

This paper proposes second-order distributed algorithms over multi-agent networks to solve the convex optimization problem by utilizing the gradient tracking strategy, with convergence acceleration being achieved. Both the undirected and unbalanced directed graphs are considered, extending existing algorithms that primarily focus on undirected or balanced directed graphs. Our algorithms also have the advantage of abandoning the diminishing step-size strategy so that slow convergence can be avoided. Furthermore, the exact convergence to the optimal solution can be realized even under the constant step size adopted in this paper. Finally, two numerical examples are presented to show the convergence performance of our algorithms.

关键词： Distributed convex optimization second-order distributed algorithm multi-agent systems gradient tracking directed graph

Evolutionary dynamics of tax-based strong altruistic reward andpunishment in a public goods game

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Chinese Physics B 2024年第9期33卷 247-257页

作者： Zhi-hao yang Yan-Long yang Mathematics and Statistics School Guizhou UniversityGuiyang 550025China

In public goods games, punishments and rewards have been shown to be effective mechanisms for maintaining individualcooperation. However, punishments and rewards are costly to incentivize cooperation. Therefore, the generation ofcostly penalties and rewards has been a complex problem in promoting the development of cooperation. In real society,specialized institutions exist to punish evil people or reward good people by collecting taxes. We propose a strong altruisticpunishment or reward strategy in the public goods game through this phenomenon. Through theoretical analysis and numericalcalculation, we can get that tax-based strong altruistic punishment (reward) has more evolutionary advantages thantraditional strong altruistic punishment (reward) in maintaining cooperation and tax-based strong altruistic reward leads toa higher level of cooperation than tax-based strong altruistic punishment.

关键词： evolutionary game theory strong altruism punishment reward

Stability analysis of switched positive nonlinear systems: an invariant ray approach

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Science China(Information Sciences) 2019年第11期62卷 174-188页

作者： hao yang Xudong Zhao Bin JIANG College of Automation Engineering Nanjing University of Aeronautics and Astronautics School of Control Science and Engineering Dalian University of Technology

This paper addresses the stability problem associated with a class of switched positive nonlinear systems in which each vector field is homogeneous, cooperative, and irreducible. Instead of using the Lyapunov function approach, we fully establish the invariant ray analysis method to establish several stability conditions that depend on the states, rays, and/or times. We illustrate the efficiency of our proposed approach using the example of a chemical reaction.

关键词： positive systems switched nonlinear systems stability

Study and development of high peak power short pulse Nd:YAG laser for peening applications

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Science China(Technological Sciences) 2015年第7期58卷 1154-1161页

作者： QIAO HongChao Zhao JiBin yang hao Shenyang Institute of Automation Chinese Academy of Sciences

Because short pulse Nd:YAG laser of nanosecond pulse-width and high peak power has a unique capability to improve the mechanical properties of metal parts,a study on the development of high peak power short pulse from Nd:YAG laser along with its peening application has been *** design scheme of laser and the characteristic of laser beam transmission are presented and discussed.A pulse energy of 25 J with 15 ns pulse-width and a maximum peak power of 1660 k W laser system which use one oscillation and eight amplifiers has been *** beam has a max divergence angle of 0.03 mrad,a pulse-to-pulse pulse-width stability of±0.1 ns,and the pulse-to-pulse energy stability factors of less than±2.8%.A low value of divergence means an easier modification of a nearly hat-top laser beam intensity profile and an easier transmission of laser *** evaluate the performance of the laser system,several metal materials are *** peening quality and efficiency are analyzed by using an optical microscope,a transmission electron microscope,and an X-ray diffraction *** processing results show that the performance of this laser system is excellent.

关键词： YAG laser laser beam peak power laser peening

2D materials for solar fuels via artificial photosynthesis

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National Science Review 2022年第5期9卷 19-21页

作者： Jian Du hao yang Licheng Sun Institute of Natural Sciences Westlake Institute for Advanced Study Center of Artificial Photosynthesis for Solar Fuels School of ScienceWestlake University Department of Chemistry School of Engineering Sciences in Chemistry Biotechnology and Health KTH Royal Institute of Technology State Key Laboratory of Fine Chemicals DUT-KTH Joint Education and Research Centre on Molecular Devices Dalian University of Technology

To create a globally carbon neutral society,sustainable energy systems to replace fossil fuels are needed *** in nature converts CO2and H2O into carbohydrates and O2and is driven by solar energy via photosystemⅡ(PSⅡ...

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Microbes in mass extinction: an accomplice or a savior?

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National Science Review 2024年第1期11卷 12-15页

作者： Genming Luo Deng Liu hao yang State Key Laboratory of Geobiology and Environmental Geology China University of Geosciences (Wuhan)

Microbes include various types of organisms that are invisible to the naked eye,e.g. bacteria, archaea and microeukaryotes. Although the precise number remains largely unknown, microbes are recognized as the unseen majority of our biosphere [1]. As a group of organisms classified by body size, microbes cover a considerable spectrum of metabolisms,

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