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Reliability Analysis of Aircraft Condition Monitoring Network Using an Enhanced BDD Algorithm

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Chinese Journal of Aeronautics 2012年第6期25卷 925-930页

作者： ZHAO Changxiao CHEN yao WANG Hailiang xiong Huagang School of Electronics and Information Engineering Beihang University Beijing 100191 China

The aircraft condition monitoring network is responsible for collecting the status of each component in aircraft. The reliability of this network has a significant effect on safety of the aircraft. The aircraft condition monitoring network works in a real-time manner that all the data should be transmitted within the deadline to ensure that the control center makes proper decision in time. Only the connectedness between the source node and destination cannot guarantee the data to be transmitted in time. In this paper, we take the time deadline into account and build the task-based reliability model. The binary decision diagram （BDD）, which has the merit of efficiency in computing and storage space, is introduced when calculating the reliability of the network and addressing the essential variable. A case is analyzed using the algorithm proposed in this paper. The experimental results show that our method is efficient and proper for the reliability analysis of the real-time network.

关键词： reliability binary decision diagram aircraft condition monitoring network real-time network calculus

Instant Effects of Radiofrequency Electromagnetic Wave on Hemoglobin in Single Living Intact Red Blood Cell

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Chinese Chemical Letters 2005年第8期16卷 1121-1124页

作者： Cheng Can yao Xiao Kun LI yao xiong HUANG College of Pharmacy Jinan University Guangzhou 510630 Institute of Biomedical Engineering Jinan University Guangzhou 510630

The absorption spectrum of the hemoglobin （Hb） in single riving intact red blood cell（RBC）, exposed in 900 MHz radiofrequency electromagnetic wave （RF-EMW）, was non-invasive,in situ, real-time measured by employing a highly sensitive fast multi-channel microspectrophotometer system. Both the absorption intensity and site of intracellular Hb were altered after RBCs were exposed in 900 MHz RF-EMW with power density at 5 mW/cm^2. It was indicated that not only the concentration of Hb in living RBCs was decreased, but the molecular structure of Hb was changed by the RF-EMW action.

关键词： Radiofrequency electromagnetic wave hemoglobin absorption spectrum structure and function.

Structurally and chemically compatible BiInSe3 substrate for topological insulator thin films

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Nano Research 2020年第9期13卷 2541-2545页

作者： xiong yao Jisoo Moon Sang-Wook Cheong Seongshik Oh Center for Quantum Materials Synthesis and Department of Physics&Astronomy RutgersThe State University of New JerseyPiscatawayNew Jersey 08854USA Department of Physics&Astronomy RutgersThe State University of New JerseyPiscatawayNew Jersey 08854USA

Quality of epitaxial films strongly depends on their structural and chemical match with the substrates:The more closely they match,the better the film quality *** insulators(Tl)such as Bi2Se3 thin films are of no ***,there do not exist commercial substrates that match with Tl films both structurally and chemically,at the level commonly available for other electronic ***,we introduce BilnSe3 bulk crystal as the best substrate for Bi2Se3 thin *** films exhibit superior surface morphology,lower defect density and higher Hall mobility than those on other substrates,due to structural and chemical match provided by the BilnSe3 ***3 substrate could accelerate the advance of Tl research and applications.

关键词： topological insulator substrate match epitaxy Bi2Se3 BilnSe3

Risk analysis for a cascade reservoir system using the brittle risk entropy method

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Science China(Technological Sciences) 2016年第6期59卷 882-887页

作者： YANG Yin REN Qing Wen TIAN Ying xiong yao College of Hydraulic Conservation and Hydropower Engineering Hohai University Department of Engineering Mechanics Hohai University

The principal means of conserving water and utilizing hydropower in China is to exploit the use of a series of reservoirs in a cascade. This method and its inherent engineering safety problems are receiving increasing attention nowadays. In the field of engineering safety analysis, much work has focused on single reservoir projects in the past few years, but there is little research available on the safety risk analysis of cascade reservoirs, either within China or internationally. Therefore, a framework for risk analysis on the cascade reservoir system based on the theory of system engineering is constructed in this article. A cascading failure model is established and the connection degree factor discussed. In addition, the importance degree of the subsystem, which can be calculated by combining the analytical hierarchy process and the entropy weight method, is explained. According to brittleness theory of a complex system, brittle risk entropy is proposed as a performance index for measuring the collapse uncertainty of the cascade reservoir system. In addition, the brittle risk of the cascade reservoir system is predicted, which provides a reference for safety analysis in water conservation and hydropower construction projects in China.

关键词： cascading failure model safety analysis risk assessment complex system brittle risk entropy

Optical transparent metamaterial structure for microwave-infrared-compatible camouflage based on indium tin oxide

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Science China(Technological Sciences) 2023年第10期66卷 2850-2861页

作者： LUO Hui xiong yao CHENG YongZhi CHEN Fu LI XiangCheng School of Information Science and Engineering Wuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China

A visible transparent metamaterial absorber was designed and fabricated with ultrabroadband microwave absorption and low infrared emissivity to meet the increasing demand for multispectral compatible camouflage. The absorber was fabricated with a low-infrared emissive layer at the top, a microwave-absorbing layer in the middle, and a reflective layer at the bottom, which were separated by polymethyl methacrylate plates. The absorber showed an average visible transmittance of 55%, infrared emissivity of ~0.37, and effective microwave absorption bandwidth of 32.1 GHz with a total thickness of 3.0 mm. Furthermore,microwave absorption exhibited wide-angle stability and polarization insensitivity characteristics. The mechanism of microwave attenuation was further explored through effective electromagnetic parameters as well as surface current, electric field, magnetic field, and energy loss density distributions. The experimental results were consistent with those of the simulations and calculations, indicating the potential of the designed metamaterial absorber for future applications in multispectral compatible camouflage.

关键词： optical transparent microwave absorption metamaterial low infrared emissivity indium tin oxide

Coherent Control of Multiple 2nd-Order Quantum Pathways

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Chinese Journal of Chemical Physics 2015年第4期28卷 -页

作者： Fang Gao yao-xiong Wang De-wen Cao Feng Shuang Institute of Intelligent Machines Chinese Academy of Sciences Hefei 230031 China Institute of Intelligent Machines Chinese Academy of Sciences Hefei 230031 ChinaDepartment of Automation University of Science and Technology of China Hefei 230027 China

The manipulation of two 2nd-order quantum pathways has been successfully demonstrated experimentally in atomic Rubidium. This work would explore the coherent control of pathways in the quantum system with N intermediate states connecting the initial and target states. A 4N-block scheme is proposed to control the N 2nd-order pathways which are driven by a weak broadband pulse. The model with N=3 is given as an example to demonstrate our strategy. In this scheme, boundaries of the spectral blocks are functions of the resonant frequencies, and the resonant and non-resonant contributions interfere mutually to achieve the quantum pathway control effectively. The simple strategy may provide a practical choice for pathway manipulation experiments since there are only 2N phase variables to adjust.

关键词： Coherent control Multiple 2nd-order Quantum pathway

Piezotronic neuromorphic devices:principle,manufacture,and applications

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International Journal of Extreme Manufacturing 2024年第3期6卷 363-385页

作者： Xiangde Lin Zhenyu Feng yao xiong Wenwen Sun Wanchen yao Yichen Wei Zhong Lin Wang Qijun Sun Department of Research Shanghai University of Medicine and Health Sciences Affiliated Zhoupu HospitalShanghai 201318People’s Republic of China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400People’s Republic of China Center on Nanoenergy Research School of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004People’s Republic of China Shandong Zhongke Naneng Energy Technology Co. LtdDongying 257061People’s Republic of China Georgia Institute of Technology AtlantaGA 30332-0245United States of America

With the arrival of the era of artificial intelligence(AI)and big data,the explosive growth of data has raised higher demands on computer hardware and *** techniques inspired by biological nervous systems are expected to be one of the approaches to breaking the von Neumann *** neuromorphic devices modulate electrical transport characteristics by piezopotential and directly associate external mechanical motion with electrical output signals in an active manner,with the capability to sense/store/process information of external *** this review,we have presented the piezotronic neuromorphic devices(which are classified into strain-gated piezotronic transistors and piezoelectric nanogenerator-gated field effect transistors based on device structure)and discussed their operating mechanisms and related manufacture ***,we summarized the research progress of piezotronic neuromorphic devices in recent years and provided a detailed discussion on multifunctional applications,including bionic sensing,information storage,logic computing,and electrical/optical artificial ***,in the context of future development,challenges,and perspectives,we have discussed how to modulate novel neuromorphic devices with piezotronic effects more *** is believed that the piezotronic neuromorphic devices have great potential for the next generation of interactive sensation/memory/computation to facilitate the development of the Internet of Things,AI,biomedical engineering,etc.

关键词： piezotronics neuromorphic devices strain-gated transistors piezoelectric nanogenerators synaptic transistors

Spatial variability of soil organic carbon and total nitrogen in the hilly red soil region of Southern China

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Journal of Forestry Research 2020年第6期31卷 2385-2394页

作者： xiong yao Kunyong Yu Yangbo Deng Jian Liu Zhuangjie Lai College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002China University Key Lab for Geomatics Technology and Optimize Resources Utilization in Fujian Province Fuzhou 350002China

To obtain accurate spatial distribution maps of soil organic carbon(SOC)and total nitrogen(TN)in the Hetian Town in Fujian Province,China,soil samples from three depths(0–20,20–40,and 40–60 cm)at 59 sampling sites were sampled by using traditional analysis and geostatistical *** SOC and TN ranged from 2.26 to 47.54 g kg-1,and from 0.28 to 2.71 g kg-1,*** coefficient of variation for SOC and TN was moderate at 49.02–55.87%for all *** to the nuggetto-sill ratio values,a moderate spatial dependence of SOC content and a strong spatial dependence of TN content were found in different soil depths,demonstrating that SOC content was affected by both extrinsic and intrinsic factors while TN content was mainly influenced by intrinsic *** of cross-validation,such as mean error,mean standardized error,were close to zero,indicating that ordinary kriging interpolation is a reliable method to predict the spatial distribution of SOC and TN in different soil *** using ordinary kriging indicated the spatial pattern of SOC and TN were characterized by higher in the periphery and lower in the *** improve the accuracy of spatial interpolation for soil properties,it is necessary and important to incorporate a probabilistic and machine learning methods in the future study.

关键词： SOC TN Spatial variability Geostatistics Red soil

Study on the Size Distribution and Similarity Law of Bubble Nuclei in Water

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China Ocean Engineering 2021年第3期35卷 432-442页

作者： yao xiong-liang LI Zhi-peng SUN Long-quan CHEN Wei-chu College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China

To study the distribution characteristics and similarity laws of nuclei under different pressures,based on the selfdesigned decompression chamber and the acoustic measuring system,the size distributions of nuclei in the degassed tap water under negative ambient pressures were measured.A number density distribution function of nuclei based on the modified Weibull distribution function was proposed and verified by the experimental measurement results and some published data of nuclei size *** on this nuclei number density distribution function,the similarity law of the nuclei size distribution was analyzed:in the scale experiment,the value of exponential in the similarity law of the nuclei number density should be determined by the nuclei size distribution of the water in the prototype experiment and the actual nuclei size distribution of the water in the model *** a precondition is that the nuclei size distributions are similar.

关键词： nuclei number density distribution function microbubble ambient pressure similarity law