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Optimal crater landmark selection based on optical navigation performance factors for planetary landing

Chinese Journal of Aeronautics 2023年第3期36卷 254-270页

作者： Yi XIU Shengying ZHU Rui XU Maodeng LI School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Autonomous Navigation and Control for Deep Space Exploration Ministry of Industry and Information TechnologyBeijing 100081China Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of EducationBeijing 100081China Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control EngineeringBeijing 100091China

Planetary craters are natural navigation landmarks that widely exist and are easily *** navigation based on crater landmarks has become an important autonomous navigation method for planetary *** to the increase in observed crater landmarks and the limitation of onboard computation,the selection of good crater landmarks has gradually become a research hotspot in the field of landmark-based optical *** paper designs a fast crater landmark selection method,which not only considers the configuration observability of crater subsets but also focuses on the influence on navigation performance arising from the measurement uncertainty and the matching confidence of craters,which is different from other landmark selection *** factor of measurement uncertainty,which is anisotropic,correlated and nonidentically distributed,is quantified and integrated into selection based on crater pairing detection and localization error *** addition,the concept of the crater matching confidence factor is introduced,which reflects the possibility of 2D projection measurements corresponding to 3D *** with the configuration observability factor,the crater landmark selection indicator is ***,the effectiveness of the proposed method is verified by Monte Carlo simulations.

关键词： Crater-based optical navigation Crater landmark selection Crater matching Measurement uncertainty Planetary landing

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Microstructure Analysis of TC4/Al 6063/Al 7075 Explosive Welded Composite Plate via Multi-scale Simulation and Experiment

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稀有金属材料与工程 2025年第1期54卷 27-38页

作者： Zhou Jianan Luo Ning Liang Hanliang Chen Jinhua Liu Zhibing Zhou Xiaohong National Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China China Coal Technology Engineering Group Huaibei Blasting Technology Research Institute Limited Company Huaibei 235000China

Because of the challenge of compounding lightweight,high-strength Ti/Al alloys due to their considerable disparity in properties,Al 6063 as intermediate layer was proposed to fabricate TC4/Al 6063/Al 7075 three-layer composite plate by explosive *** microscopic properties of each bonding interface were elucidated through field emission scanning electron microscope and electron backscattered diffraction(EBSD).A methodology combining finite element method-smoothed particle hydrodynamics(FEM-SPH)and molecular dynamics(MD)was proposed for the analysis of the forming and evolution characteristics of explosive welding interfaces at *** results demonstrate that the bonding interface morphologies of TC4/Al 6063 and Al 6063/Al 7075 exhibit a flat and wavy configuration,without discernible defects or *** phenomenon of grain refinement is observed in the vicinity of the two bonding ***,the degree of plastic deformation of TC4 and Al 7075 is more pronounced than that of Al 6063 in the intermediate *** interface morphology characteristics obtained by FEM-SPH simulation exhibit a high degree of similarity to the experimental *** simulations reveal that the diffusion of interfacial elements predominantly occurs during the unloading phase,and the simulated thickness of interfacial diffusion aligns well with experimental *** introduction of intermediate layer in the explosive welding process can effectively produce high-quality titanium/aluminum alloy composite ***,this approach offers a multi-scale simulation strategy for the study of explosive welding bonding interfaces.

关键词： TC4/Al 6063/Al 7075 composite plate explosive welding microstructure analysis multi-scale simulation

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Effect of microwave irradiation on thermal damage behavior of granite:Uniaxial compression test and finite-discrete approach

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Journal of Rock Mechanics and Geotechnical engineering 2025年第2期17卷 827-844页

作者： Bowen Sun Shengqi Yang Shigui Du Wenling Tian Shibin Tang Heng Li Zhennan Zhu State Key Laboratory for Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou221116China Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province School of Civil EngineeringShaoxing UniversityShaoxing312000China School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhou221116China Institute of Rock Mechanics Ningbo UniversityNingbo315211China School of Civil Engineering Dalian University of TechnologyDalian116024China

Microwave-assisted rock-breaking technology,as a novel hybrid approach,is anticipated to facilitate the efficient excavation of complex rock *** is therefore crucial to understand the damage and failure mechanisms of rocks that have been subjected to *** this study,uniaxial compression experiments were conducted on granite specimens after 1.4 kW microwave irradiation for varying ***,a numerical method was proposed to solve electromagnetic-thermal-mechanical coupling problems by integrating finite and discrete *** results demonstrated a differential temperature distribution(high temperature in the middle and low-temperature areas at the ends)in the granite specimens under microwave irradiation,which resulted in a notable reduction in their physical and mechanical *** the duration of irradiation increased,the rate of heating and the extent of strength reduction both diminished,while the morphology and distribution of cracks at ultimate failure became increasingly *** numerical method effectively addresses the simulation challenges associated with the electromagnetic selective heating of granite containing multiple polar minerals under microwave *** approach accounted for the non-uniform thermal expansion of the minerals and provided a comprehensive model of damage progression under compression.

关键词： Microwave-assisted rock breaking Granite Electromagnetic-thermal-mechanical(ETM)coupling Finite-discrete approach Three-dimensional(3D)grain-based model(GBM)

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Multi-View Joint Target Selection for Relativistic-Perturbed Starlight Navigation

Multi-View Joint Target Selection for Relativistic-Perturbed...

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2024 IEEE International Conference on Unmanned Systems, ICUS 2024

作者： Zhao, Yaru Ge, Dantong Xiong, Kai School of Aerospace Engineering Beijing Institute of Technology Beijing China Key Laboratory of Autonomous Navigation Control for Deep Space Exploration Beijing Institute of Technology Beijing China National Key Laboratory of Space Intelligent Control Beijing Institute of Control Engineering Beijing China

ISBN: (纸本)9798350384185

Autonomous navigation is one of the key technologies for spacecraft to realize long-term space operation and carry out science missions. In order to meet the requirement of high precision autonomous navigation, the effects of the gravitational deflection of light, stellar aberration and measurement bias of sensor are considered to establish a relativistic-perturbed starlight navigation scheme. To obtain high quality measurements, a multi-probe star sensor composed of multiple field of view probes is adopted for observation. A polygonal star pair selection method is proposed to conduct multi-view joint target selection. By constructing irregular polygons to select high quality star pair observations, the accuracy of navigation estimation is expected to be improved. The performance of relativistic-perturbed starlight navigation using the multi-view joint target selection method is then verified through a numerical simulation. © 2024 IEEE.

关键词： Probes

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Two-year growth of deep Underground Science and engineering: A perspective

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deep Underground Science and engineering 2024年第4期3卷 383-384页

作者： Jianguo Wang Chunfai Leung Heping Xie Xiaozhao Li Na Yue Qingping Hou Jihong Wang School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province School of Civil EngineeringShaoxing UniversityShaoxingChina Center for Offshore Research and Engineering National University of SingaporeSingapore Institute of Deep Earth Sciences and Green Energy Shenzhen UniversityShenzhenChina College of Water Resource and Hydropower Sichuan UniversityChengduChina State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhouChina Editorial Office of Deep Underground Science and Engineering China University of Mining and TechnologyXuzhouChina

deep Underground Science and engineering(DUSE)launched its first issue in September 2022 as a quarterly *** far,it has published 106 articles with nine issues and online early *** volume of received manuscripts increases by 50%each year and over 200 manuscripts were received by 28th of November *** the early period,DUSE authorship came from five countries and now reaches 29 *** articles have been downloaded over 97000 times by readers from 170 countries/*** is indeed encouraging to note that DUSE has been admitted to different indices,including ESCI(August 2024),EI(March 2024),Scopus(July 2023),and DOAJ(May 2023).Its CiteScore in Scopus was 2.2 in 2023 and increased to 5.1 at the mid-November *** first impact factor from the Web of Science will be available in *** is growing to be a rapidly recognized international journal by readers in deep underground research and practice.

关键词： journal admitted underground

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Realtime prediction of hard rock TBM advance rate using temporal convolutional network(TCN)with tunnel construction big data

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Frontiers of Structural and Civil engineering 2022年第4期16卷 401-413页

作者： Zaobao LIU Yongchen WANG Long LI Xingli FANG Junze WANG Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Institute of Deep Engineering and Intelligent TechnologyNortheastern UniversityShenyang 110819China State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China Software College Northeastern UniversityShenyang 110819China

Real-time dynamic adjustment of the tunnel bore machine(TBM)advance rate according to the rockmachine interaction parameters is of great significance to the adaptability of TBM and its efficiency in *** paper proposes a real-time predictive model of TBM advance rate using the temporal convolutional network(TCN),based on TBM construction big *** prediction model was built using an experimental database,containing 235 data sets,established from the construction data from the Jilin Water-Diversion Tunnel Project in *** TBM operating parameters,including total thrust,cutterhead rotation,cutterhead torque and penetration rate,are selected as the input parameters of the *** TCN model is found outperforming the recurrent neural network(RNN)and long short-term memory(LSTM)model in predicting the TBM advance rate with much smaller values of mean absolute percentage error than the latter *** penetration rate and cutterhead torque of the current moment have significant influence on the TBM advance rate of the next *** the contrary,the influence of the cutterhead rotation and total thrust is *** work provides a new concept of real-time prediction of the TBM performance for highly efficient tunnel construction.

关键词： hard rock tunnel tunnel bore machine advance rate prediction temporal convolutional networks soft computing construction big data

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Application of integrated geophysical techniques in geothermal exploration in Binhai County, Jiangsu Province

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deep Underground Science and engineering 2024年第3期3卷 338-348页

作者： Juncheng Wang Shiyin Gao Jianguo Wang Lin Li Xiaoyan Gong Jinbao Su College of Oceanography Hohai UniversityNanjingChina School of Earth Sciences and Engineering Hohai UniversityNanjingChina Geological Exploration Technology Institute of Jiangsu Province NanjingChina Jiangsu Engineering Research Center for Aeronautical Earth Exploration and Intelligent Sensing NanjingChina School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

Integrated geophysical technology is a necessary and effective means for geothermal ***,integration of geophysical technology for large‐scale surveys with those for geothermal reservoir localization is still in *** study used the controlled source audio‐frequency magnetotelluric method technology for large‐scale exploration to obtain underground electrical structure information and micromotion detection technology to obtain underground wave velocity structure *** combination of two detection technologies was used for local identification of geothermal ***,auxiliary correction and inversion constraint were implemented through the audio magnetotelluric sounding technology for maximum authenticity restoration of the near‐and transition‐field *** these technology improvements,a geothermal geological model was established for the Binhai County of Jiangsu Province in China and potential geothermal well locations were *** this basis,a geothermal well was drilled nearly 3000m deep,with a daily water volume of over 2000m3/day and a geothermal water temperature of 51°C at the well *** is found that predictions using the above integrated geophysical exploration technology are in good agreement with the well geological formation *** integrated geophysical technology can be effectively applied for geothermal exploration with high precision and reliability.

关键词： controlled source audio frequency magnetotelluric method(CSAMT) geothermal exploration integrated geophysical technology micromotion detection technology

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In-situ construction of epitaxial phase for boosting zinc nucleation on three-dimensional interface

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Progress in Natural Science:Materials International 2024年第3期34卷 578-584页

作者： Xin He Zhe Zhu Xiaoqiao Liao Kai Yang Yixue Duan Linfeng Lv Chuan Zhao Wei Zhao Jibing Chen Peng Tian Xiaoyu Liu Liang He School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University School of Chemistry Faculty of Science University of New South Wales School of Materials Science and Engineering Sichuan University of Science & Engineering School of Mechanical Engineering Wuhan Polytechnic University Med+X Center for Manufacturing West China Hospital Sichuan University Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University

Interface modification of zinc（Zn） metal anode with conductive three-dimensional（3D） structure is widely utilized in zinc ion batteries. However, the uniformity of zinc nucleation on surface microstructure is rarely investigated which exacerbates the tip effect and raises unstable risk. Herein, a strategy via the initial copper（Cu）alloying and following sulfurization treatment is reported to accomplish boosted uniform nucleation of zinc on the modified layer with dense microstructures. This epitaxial sulfide phase not only improves the wetting area to revitalize the microstructural surface, but also forms a bifunctional zincophilic Cu2S/CuZn alloy interface layer,which combines the merits of guided local ions diffusion and improved zinc nucleation environment. As a result, a homogeneous growth of zinc on the 3D structural substrate can be realized, and cycling stability of the achieved Cu2S/CuZn electrode with a practical capacity of 1 mAh cm-2under 1 mA cm-2or amplified current density of 10 mA cm-2is significantly enhanced. This work provides an epitaxial strategy in constructing a bifunctional zincophilic interface layer for boosting zinc nucleation, and offers a new perspective on the modification of 3D surface structure for stabilization of zinc anode.

关键词： Zn anode Hydrophilicity Sulfide CuZn alloy Zn metal battery

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Effects of fracture evolution and non-Darcy flow on the thermal performance of enhanced geothermal system in 3D complex fractured rock

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International Journal of Mining Science and technology 2024年第4期34卷 443-459页

作者： Yachen Xie Jianxing Liao Pengfei Zhao Kaiwen Xia Cunbao Li Department of Civil and Mineral Engineering University of TorontoToronto M5S1A4Canada College of Water Resources and Hydropower Sichuan UniversityChengdu 610225China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsWuhan 430071China College of Civil Engineering Guizhou UniversityGuiyang 550025China Institute of Geosafety School of Engineering and TechnologyChina University of GeosciencesBeijing 100083China State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Shenzhen UniversityShenzhen 518060China

In fractured geothermal reservoirs,the fracture networks and internal fluid flow behaviors can significantly impact the thermal *** this study,we proposed a non-Darcy rough discrete fracture network(NR-DFN)model that can simultaneously consider the fracture evolution and non-Darcy flow dynamics in studying the thermo-hydro-mechanical(THM)coupling processes for heat extraction in geothermal *** further employed the model on the Habanero enhanced geothermal systems(EGS)project located in ***,our findings illustrate a clear spatial-temporal variation in the thermal stress and pressure perturbations,as well as uneven spatial distribution of shear failure in 3D fracture *** shear failure is mainly concentrated in the first fracture ***,channeling flow have also been observed in DFNs during heat extraction and are further intensified by the expansion of fractures driven by thermal ***,the combined effect of non-Darcy flow and fracture evolution triggers a rapid decline in the resulting heat rate and *** NR-DFN model framework and the Habanero EGS's results illustrate the importance of both fracture evolution and non-Darcy flow on the efficiency of EGS production and have the potential to promote the development of more sustainable and efficient EGS operations for stakeholders.

关键词： Coupled THM model Non-Darcy flow Deformable DFN Enhanced geothermal systems

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Design and development of the deep-rock in-situ condition-preserved coring calibration platform

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International Journal of Mining Science and technology 2023年第11期33卷 1377-1395页

作者： Yihang Li Heping Xie Ru Zhang Zetian Zhang Zhilong Zhang Heng Gao Wei Huang Jixun Zhang Jiming Gao Xin Ma Ruibing Xu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering College of Water Resource and HydropowerSichuan UniversityChengdu 610065China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy Shenzhen UniversityShenzhen 518060China School of Mechanical Engineering Sichuan UniversityChengdu 610065China Donghua Zhuoyue Technology Co. Ltd.Chengdu 611130China Special Equipment Safety Supervision Inspection Institute of Jiangsu Province Nanjing 210036China Inner Mongolia North Heavy Industries Group Co. Ltd.Baotou 014033China

To systematically validate and calibrate the theory and technology of the deep in-situ conditionpreserved coring, the in-situ conditions at different depths should be simulated, and the full-size coring tests should be carried out in this simulated environment. Therefore, a deep-rock in-situ conditionpreserved coring calibration platform was designed and developed. The self-tightening sealing structure and the quick-disassembly structure were designed on the basis of an innovative segmented nonuniformdiameter structure, which was a breakthrough from the traditional high-pressure vessel frame and was verified by finite element simulation and actual testing under extreme working conditions, *** simulate the actual deep in-situ environment with a temperature of 150℃ and pressure of 140 MPa for a large Φ450 mm×H1400 mm core, temperature and pressure control systems were designed by coupling, and a pre-embedded high-pressure-resistant temperature sensor was designed. Finally, highprecision assembly automation, complex movement coordination of the coring device with the platform,and rotary dynamic sealing were achieved by utilizing the combination of adaptive cabin body servo control and an adaptive mechanical structure in a limited space, laying a solid foundation for the calibration of in-situ condition-preserved coring.

关键词： In-situ condition-preserved coring calibration deep Earth science Coring simulation Rotary dynamic seal

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