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An Architectural Approach for Capability Mapping and Gap Analysis

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Journal of systems Science and Information 2013年第1期1卷 86-96页

作者： Kewei YANG Bingfeng GE Qingsong ZHAO Jiang JIANG Science and Technology on Complex systems Simulation Laboratory National University of Defense Technology College of Information system and Management

To cope with the increasing complexity and constantly changing capability requirements of system-of-systems, an architectural approach for capability mapping and gap analysis is ***, a more specific architecture framework is presented. Secondly, on the basis of the analysis of the semantic relationships between constituent architecture data elements, a capability mapping approach is proposed to manage the relations between capabilities and systems based on the mapping matrixes representing associations of core entities. Then, a four-step capability mapping process for the mapping from capabilities to systems is suggested. Moreover, the capability gap analysis on how to identify and fill the capability gaps is also studied. Finally, an example of specific Net-Centric Warfare mission of Precision Engagement is used to illustrate the feasibility of the approach.

关键词： system-of-systems capability architecture description mapping matrixes core entities gap analysis

Characteristics of the lunar samples returned by the Chang'E-5 mission

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National Science Review 2022年第2期9卷 21-33页

作者： Chunlai Li Hao Hu Meng-Fei Yang Zhao-Yu Pei Qin Zhou Xin Ren Bin Liu Dawei Liu Xingguo Zeng Guangliang Zhang Hongbo Zhang Jianjun Liu Qiong Wang Xiangjin Deng Caijin Xiao Yonggang Yao Dingshuai Xue Wei Zuo Yan Su Weibin Wen Ziyuan Ouyang Key Laboratory of Lunar and Deep Space Exploration National Astronomical Observatories Chinese Academy of Sciences Lunar Exploration and Space Engineering Center Beijing Institute of Spacecraft system Engineering Department of Nuclear Physics China Institute of Atomic Energy State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Geochemistry Chinese Academy of Sciences

Forty-five years after the Apollo and Luna missions returned lunar samples,China’s Chang’E-5(CE-5)mission collected new samples from the mid-latitude region in the northeastern Oceanus Procellarum of the *** study shows that 95% of CE-5 lunar soil sizes are found to be within the range of 1.40-9.35 μm,while 95% of the soils by mass are within the size range of 4.84-432.27 μ*** bulk density,true density and specific surface area of CE-5 soils are 1.2387 g/cm~3,3.1952 g/cm~3 and 0.56 m~2/g,*** from the CE-5 regolith are classified into igneous clasts(mostly basalt),agglutinate and glass.A few breccias were also *** minerals and compositions of CE-5 soils are consistent with mare basalts and can be classified as low-Ti/low-Al/low-K type with lower rare-earth-element contents than materials rich in potassium,rare earth element and ***-5 soils have high FeO and low Mg index,which could represent a new class of basalt.

关键词： Chang’E-5 lunar soils physical properties petrography mineralogy chemistry

COMPARISON OF PERSIANN AND TMPA DAILY PRECIPITATION ESTIMATES OVER HUNAN PROVINCE OF CHINA

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Journal of Tropical Meteorology 2018年第1期24卷 60-70页

作者： TAN De-quan ZHANG Tian-yu YANG Yu YOU Ya-lei YAN Guang-rong YANG Zhi-jun Shaoyang Meteorological Administration ShaoyanHunan 422000 China Chongqing Climate Center Chongqing 401147 China Department of Atmospheric Science Yunnan UniversityKunming 650091 China Earth system Science Interdisciplinary Center and Cooperative Institute for Climate and SatellitesUniversity of MarylandCollege ParkMarylandUSA

This study presented a detailed comparison of daily precipitation estimates from Precipitation Estimation from Remote Sensing Information using Artificial Neural Network(PERSIANN) and Tropical Rainfall Measuring mission(TRMM) Multi-satellite Precipitation Analysis(TMPA) over Hunan province of China from 1998 to 2014. The ground gauge observations are taken as the reference. It is found that overall TMPA clearly outperforms PERSIANN, indicating by better statistical metrics(including correlation coefficient, root mean square error and relative bias). For the geospatial pattern, although both products are able to capture the major precipitation features(e.g., precipitation geospatial homogeneity) in Hunan, yet PERSIANN largely underestimates the precipitation intensity throughout all seasons. In contrast, there is no clear bias tendency from TMPA estimates. Precipitation intensity analysis showed that both the occurrence and amount histograms from TMPA are closer to the gauge observations from spring to ***, in the winter season PERSIANN is closer to gauge observation, which is likely due to the ground contamination from the passive microwave sensors used by TMPA.

关键词： comparison PERSIANN TMPA rain gauge

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Architecture Level Thermal Modeling for Multi-Core systems using Subspace system Method

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Architecture Level Thermal Modeling for Multi-Core Systems u...

Generalized Maximum Correntropy Kalman Filter for Target Tracking in TianGong-2 Space Laboratory

2009 IEEE 8th International Conference on ASIC(ASICON 2009)

作者： Thom Jefferson A.Eguia Sheldon X.-D.Tan Eduardo H.Pacheco Murli Tirumala Department of Electrical En-gineering University of California RiversideCA 92521USA. Intel Corporation 2200 Mission Col-lege BlvdSanta ClaraCA 95052

This paper proposes a new architecture-level thermal modeling method to address the emerging thermal related analysis and optimization problem for high-performance multi-core microprocessor *** new approach,called Thermsid,builds the thermal behavioral models from the measured or simulated thermal and power information at the architecture *** builds the thermal models by first generating a Hankel matrix of Markov parameters,from which state matrices are obtained through minimum square *** to existing behavioral thermal modeling algorithms,the proposed method is much more general as it does not require step temperature responses,leading to greater flexibility during the modeling *** results on a real quad-core microprocessor show that Thermsid provides accurate thermal behavioral models comparable existing approaches.

关键词： Thermal analysis architecture thermal modeling multicore processor

来源： cnki会议评论

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Space(Science & Technology) 2022年第1期2022卷 151-165页

作者： Yang Mo Yaonan Wang Hong Yang Badong Chen Hui Li Zhihong Jiang College of Electrical and Information Engineering Hunan UniversityChangshaChina Institute of Manned Spacecraft system Engineering China Academy of Space Technology(CAST)BeijingChina Institute of Artificial Intelligence and Robotics Xi’an Jiaotong UniversityXi’anChina School of Mechatronical Engineering Beijing Institute of TechnologyBeijingChina

Target tracking plays an important role in the construction,operation,and maintenance of the space station by the robot,which puts forward high requirements on the accuracy of target ***,the special space environment may cause complex non-Gaussian noise in target tracking *** the performance of traditional Kalman Filter will deteriorate seriously when the error signals are non-Gaussian,which may lead to mission *** the paper,a novel Kalman Filter algorithm with Generalized Maximum Correntropy Criterion(GMCKF)is proposed to improve the tracking accuracy with non-Gaussian *** GMCKF algorithm,which replaces the default Gaussian kernel with the generalized Gaussian density function as kernel,can adapt to multi-type non-Gaussian noises and evaluate the noise accurately.A parameter automatic selection algorithm is proposed to determine the shape parameter of GMCKF algorithm,which helps the GMCKF algorithm achieve better performance for complex non-Gaussian *** performance of the proposed algorithm has been evaluated by simulations and the ground ***,the algorithm has been applied in the maintenance experiments in TianGong-2 space laboratory of *** results validated the feasibility of the proposed method with the target tracking precision improved significantly in complex non-Gaussian environment.

关键词： entropy kernel parameter

Insight-HXMT on-orbit thermal control status and thermal deformation impact analysis

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Radiation Detection Technology and Methods 2023年第3期7卷 337-349页

作者： Ai-Mei Zhang Yi-Fan Zhang Jin-Yuan Liao Yu-Peng Xu Yu-Sa Wang Wen-Bo Luo Yu-Peng Zhou Zhi-Ying Qian Xiao-Bo Li Fang-Jun Lu Shuang-Nan Zhang Li-Ming Song Cong-Zhan Liu Fan Zhang Jian-Yin Nie Juan Wang Sheng Yang Tong Zhang Xiao-Jing Liu Rui-Jie Wang Xu-Fang Li Yi-Fei Zhang Zheng-Wei Li Xue-Feng Lu He Xu Di Wu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China Beijing Institute of Spacecraft system Engineering CASTBeijing 100094China

Purpose The Hard X-ray Modulation Telescope is China’s first X-ray astronomy satellite launched on June 15,2017,dubbed *** and passive thermal control measures are employed to keep devices at suitable *** this paper,we analyzed the on-orbit thermal monitoring data of the first 5 years and investigated the effect of thermal deformation on the point spread function(PSF)of the *** We examined the data of the on-orbit temperatures measured using 157 thermistors placed on the collimators,detectors and their support structures and compared the results with the thermal control *** thermal deformation was evaluated by the relative orientation of the two star sensors installed on the main support *** effect was estimated with evolution of the PSF obtained with calibration scanning observations of the Crab *** The on-orbit temperatures met the thermal control requirements thus far,and the effect of thermal deformation on the PSF was negligible after the on-orbit pointing calibration.

关键词： X-ray Insight-HXMT Thermal control Temperature Star sensor data Pointing PSF

mission segment division of the whole aeroengine loading spectrum based on flight actions

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Chinese Journal of Aeronautics 2022年第2期35卷 164-174页

作者： Yu JIN Zhigang SUN Yingdong SONG Xin LIN Xuming NIU Junjie DING Jiangsu Province Key Laboratory of Aerospace Power system College of Energy and Power EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Aero-engine Thermal Environment and StructureMinistry of Industry and Information TechnologyNanjing 210016China State Key Laboratory of Mechanics and Control Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

This paper studies on a division method of the whole aeroengine loading spectrum flight mission segment and rotor speed mission segment,which is based on the actual flight actions and related to the flight operations of aeroengine and is suitable for the variable-speed aeroengines such as turbojet and *** the research,the aeroengine loading spectrum operation-related mission segments can be divided,which can provide important data basis for the life research on the structures which are sensitive to flight maneuver(such as the main shaft,large gearbox and installation section),lay a foundation for the simulation,compilation and prediction of the whole aeroengine loading ***,based on the summary of basic flight actions in actual flight,the division of flight mission segment was realized by ***,the aeroengine rotor speed mission segments,associated with flight actions and missions,were divided based on the flight mission segment division ***,the efficiency and accuracy of the mission segment division results were verified by adopting measured loading spectrum ***,the characteristics of speed mission segment division results were compared and analyzed in tables and *** comparison results show that the characteristics of similar speed mission segments are similar,while the characteristics of different speed mission segments are *** the shapes of similar mission segments vary to the change of flight actions and operations,which can reflect the operation-related feature of the segments.

关键词： Aircraft engine Flight mission segment mission segment division Rotor speed mission segment Spectrum analysis

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Smart Python Agents for Microgrids

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Smart Grid and Renewable Energy 2023年第10期14卷 183-196页

作者： Salem Al-Agtash Xueyan Xian Kristina Petroshchuk Heba Syeddah Department of Computer Science and Engineering Santa Clara University Santa Clara CA USA Department of Computer Engineering German Jordanian University Amman Jordan Department of Computer Science and Information Technology Mission College Santa Clara CA USA

Microgrids are revolutionary power systems that interconnect a mix of renewable power generation, load, storage systems, and inverters in a small-scale grid network. Operating microgrids while maintaining a consistent grid voltage and frequency during the islanding and disruption of renewables has been a challenging research problem. In this paper, a preliminary microgrid agent implementation is presented using SPADE (Smart Python Agent Development Environment) as a powerful development framework that has been used extensively in many application domains. Agents autonomously managed and operated microgrid individual components. A multiagent microgrid system was modeled to seamlessly operate and optimize energy balance by coordinating the actions of agents. Agents were built to forecast energy demand and solar power and coordinate to balance generation with load while maintaining optimal power flow and adequate network voltage and frequency.

关键词： Microgrids Agents SPADE Renewable Power

Insight-HXMT：China＇s First X-Ray Astronomical Satellite

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Aerospace China 2017年第4期18卷 3-12页

作者： PAN Teng NI Runli ZHANG Long HONG Bin GU Quanying LU Fangjun XU Yupeng Beijing Institute of Spacecraft system Engineering Beijing 100094 Institute of High Energy Physics Chinese Academy of Science Beijing 100049

The Hard X-ray Modulation Telescope(HXMT) satellite is the first X-ray astronomical satellite in China. Utilizing the "direct demodulation image reconstruction method", HXMT will perform broad band(1-250 keV) survey of large sky areas in scanning mode, which can result in source detection characterized with high sensitivity and spatial resolution. Point observation is another key working mode of HXMT, and is specified for observations of galactic bright sources like X-Ray Binary(XRB) and others. Additionally, HXMT also has a powerful capability developed for monitoring gamma-ray bursts, which is quite unique in the world due to its energy coverage of 200 keV-3 MeV and largest detection area. The HXMT satellite was launched by a Long March 4 B(LM-4 B) rocket from the Jiuquan Satellite Launch Center on June 15, 2017. The payloads onboard HXMT are a High Energy X-ray Telescope(HE), a Medium Energy X-ray Telescope(ME), a Low Energy X-ray Telescope(LE), and a Space Environment Monitor(SEM).This paper introduces the main technical aspects of the satellite, including scientific objectives, technical features, mission design, and system design.

关键词： HXMT mission design system design

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