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Pan-location mapping and localization for the in-situ science exploration of Zhurong Mars rover

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Science China(Information Sciences) 2022年第7期65卷 170-184页

作者： xingguo zeng Jianjun LIU xin REN Wei YAN Qiang FU xingye GAO Wangli chen Wei ZUO Chunlai LI Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of Sciences School of Astronomy and Space Science University of Chinese Academy of Sciences

On May 15, 2021, Tianwen-1 successfully landed in the Utopia Planitia of Mars, and its rover Zhurong began to carry out an in-situ science exploration of the Mars surface. To determine the location,driving direction, and exploration targets of the rover, it is necessary to provide decision support for the in-situ science exploration of the rover and ensure the achievement of the scientific objectives, which pose significant challenges to the ground science team. Based on the classical research on Lunar and planetary localization, navigation and exploration target selection, and the recent study of pan-location cartographic theory, a pan-location mapping method for an in-situ rover exploration is proposed. In addition, a panlocation reference system, mapping data model, and mapping method are designed to realize the localization and visualization of the landing platform, rover, and exploration targets. The mapping method has been successfully applied to the localization, navigation, and science exploration of the target selection involved in the in-situ exploration of the Zhurong rover. The results of this study not only provide vital support to the implementation of the Tianwen-1 mission; they can also be used as instructions for other future in-situ Lunar and planetary exploration missions.

关键词： Pan-location mapping pan-location mapping planetary exploration Planetary exploration Geo-visualization geo-visualization Tianwen-1 mission Zhurong rover

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A model cathode for mechanistic study of organosulfide electrochemistry in Li-organosulfide batteries

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Journal of Energy Chemistry 2022年第3期31卷 440-447,I0012页

作者： Wei Zhang Fenfen Ma Sibei Guo xin chen Ziqi zeng Qiang Wu Shuping Li Shijie cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina GuSu Laboratory of Materials Suzhou 215123JiangsuChina Hefei National Laboratory for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Organosulfides offer new opportunities for high performance lithium-sulfur(Li-S)batteries because of materials abundance,versatile structures and unique ***,their redox kinetics as well as cycling performance need to be further *** redox mediators is a highly effective strategy to address above ***,the underlying mechanism in this chemistry is so far insufficiently ***,phenyl disulfide(Ph S–SPh)and phenyl diselenide(Ph Se–Se Ph)are used as a model system for mechanistic understanding of organosulfide electrochemistry,particularly the rate *** the reaction thermodynamics and charge-discharge process reveals redox of both S–S and C–S bonds,as well as that the coupling between radical exchange and electrochemical redox is the key to enhance the sulfur *** study not only establishes a basic understanding of orgaonsulfide electrochemistry in Li-S batteries,but also points out a general strategy for enhancing the kinetics of sulfur electrodes in electrochemical devices.

关键词： Organosulfide Radical exchange Reaction kinetics Rate acceleration

Machine learning models for the secondary Bjerknes force between two insonated bubbles

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Acta Mechanica Sinica 2021年第1期37卷 35-46,I0001页

作者： Haiyan chen Yue zeng Yi Li School of Material and Energy Guangdong University of TechnologyGuangzhou510006China School of Mathematics and Statistics University of SheffieldSheffieldS37RHUK

The secondary Bjerknes force plays a significant role in the evolution of bubble ***,due to the complex dependence of the force on multiple parameters,it is highly non-trivial to include its effects in the simulations of bubble *** this paper,machine learning is used to develop a data-driven model for the secondary Bjerknes force between two insonated bubbles as a function of the equilibrium radii of the bubbles,the distance between the bubbles,the amplitude and the center frequency of the ultrasound *** sign of the force may change with the phase difference between the oscillating ***,the magnitude of the force varies over several orders of magnitude,which poses a serious challenge for the usual machine learning *** overcome this difficulty,the magnitudes and the signs of the force are separated and modelled separately.A nonlinear regression is obtained with a feed-forward network model for the logarithm of the magnitude,whereas the sign is modelled by a support-vector machine *** principle,the practical aspects related to the training and validation of the machine models are *** predictions from the models are checked against the values computed from the Keller-Miksis *** results show that the models are extremely efficient while providing accurate estimate of the *** models make it computationally feasible for the future simulations of the bubble clusters to include the effects of the secondary Bjerknes force.

关键词： Bubble clusters Secondary Bjerknes force Machine learning Neural networks Support-vector machine Numerical simulations

Multifunctional silicene/CeO_(2)heterojunctions:Desirable electronic material and promising water-splitting photocatalyst

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Chinese Chemical Letters 2022年第8期33卷 3947-3950页

作者： Liang Xu Jian zeng Quan Li xin Luo Tong chen Jingjing Liu Ling-Ling Wang Energy Materials Computing Center School of Energy and Mechanical EngineeringJiangxi University of Science and TechnologyNanchang 330013China Department of Applied Physics School of ScienceEast China Jiaotong UniversityNanchang 330013China Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha 410082China

The first-principles calculations demonstrate that covalently bonded(cb)heterojunction and van der Waals(vd W)heterojunction can coexist in silicene/CeO_(2) heterojunctions,due to the different stacking ***,the cb heterojunction with band gap of 1.97 e V,forms a type-II heterojunction,exhibits good redox performance and has high-effective optical absorption spectra,thus it is a promising photocatalyst for overall water ***,for the vd W heterojunction,the Dirac cone of silicene is well kept on CeO_(2) semiconducting substrate,with a considerable energy gap of 0.43 e V,which can be an ideal material in building silicene-based electronic *** results may open a new gateway in both of nanoelectronic device and energy conversion for silicene/Ce O2 nanocomposites.

关键词： Silicene CeO_(2) Photocatalyst Interfacial interaction Dirac cone

建设健康社会的催化剂:健康社会工作者与全科医生在基层的合作

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中国全科医学 2025年第4期28卷 516-520页

作者：李奕桦赵艾杨曾飞方雪张旺王欣武汉大学中南医院创伤与显微骨科湖北省武汉市430071 巴东县人民医院骨科湖北省恩施土家族苗族自治州444300

以“健康中国”战略为导向,从优势互补专业知识、共同连接医院社区、拓展研究社会健康三个方面去探讨健康社会工作者与全科医生在基层卫生环境中的合作价值,尤其在完善公共卫生应急体系和构建医联体上,健康社会工作者与全科医生的合作... 详细信息

以“健康中国”战略为导向,从优势互补专业知识、共同连接医院社区、拓展研究社会健康三个方面去探讨健康社会工作者与全科医生在基层卫生环境中的合作价值,尤其在完善公共卫生应急体系和构建医联体上,健康社会工作者与全科医生的合作可以发挥必不可少的作用,能有效推动健康社会的建设进程。同时文章也指明了目前健康社会工作面临的主要挑战,并提出相应的对策。

关键词：健康社会健康社会工作者全科医生基层卫生公共卫生应急医联体

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Bio-inspired robotic impedance adaptation for human-robot collaborative tasks

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Science China(Information Sciences) 2020年第7期63卷 69-78页

作者： Chao zeng chenguang YANG Zhaopeng chen School of Automation Science and Engineering South China University of Technology TAMS Group Informatics University of Hamburg

To improve the robotic flexibility and dexterity in a human-robot collaboration task, it is important to adapt the robot impedance in a real-time manner to its partner’s behavior. However, it is often quite challenging to achieve this goal and has not been well addressed yet. In this paper, we propose a bio-inspired approach as a possible solution, which enables the online adaptation of robotic impedance in the unknown and dynamic environment. Specifically, the bio-inspired mechanism is derived from the human motor learning, and it can automatically adapt the robotic impedance and feedforward torque along the motion trajectory. It can enable the learning of compliant robotic behaviors to meet the dynamic requirements of the interactions. In order to validate the proposed approach, an experiment containing an anti-disturbance test and a human-robot collaborative sawing task has been conducted.

关键词： impedance learning biomimetic control human-robot collaboration

High Expression of p300 in Human Breast Cancer Correlates with Tumor Recurrence and Predicts Adverse Prognosis

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Chinese Journal of Cancer Research 2011年第3期23卷 201-207页

作者： Xiang-sheng Xiao Mu-yan Cai Jie-wei chen xin-yuan Guan Hsiang-fu Kung Yi-xin zeng Dan Xie State Key Laboratory of Oncology in South China Guangzhou 510060China Department of Breast Oncology Guangzhou 510060China Department of Pathology Sun Yat-sen University Cancer CenterGuangzhou 510060China The Chinese University of Hong Kong Hong KongChina

Objective：Transcriptional coactivator p300 has been shown to play a variety of roles in the transcription process and mutation of p300 has been found in certain types of human ***,the expression dynamics of p300 in breast cancer （BC） and its effect on BC patients＇ prognosis are poorly ***：In the present study,the methods of tissue microarray and immunohistochemistry （IHC） were used to investigate the protein expression of p300 in *** operating characteristic （ROC） curve analysis,Spearman＇s rank correlation,Kaplan-Meier plots and Cox proportional hazards regression model were utilized to analyze the ***：Based on the ROC curve analysis,the cutoff value for p300 high expression was defined when the H score for p300 was more than *** expression of p300 could be observed in 105/193 （54.4%） of BCs,in 6/25 （24.0%） of non-malignant breast tissues,respectively （P=0.004）.Further correlation analysis showed that high expression of p300 was positively correlated with higher histological grade,advanced clinical stage and tumor recurrence （P0.05）.In univariate survival analysis,a significant association between high expression of p300 and shortened patients＇ survival and poor progression-free survival was found （P0.05）.Importantly,p300 expression was evaluated as an independent prognostic factor in multivariate analysis （P0.05）.Conclusion：Our findings provide a basis for the concept that high expression of p300 in BC may be important in the acquisition of a recurrence phenotype,suggesting that p300 high expression,as examined by IHC,is an independent biomarker for poor prognosis of patients with BC.

关键词： Breast cancer p300 Tumor recurrence Prognosis

Construction of tunable supramolecular networks studied by scanning tunneling microscopy

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Science China Chemistry 2010年第2期53卷 310-317页

作者： zeng QingDao WANG chen National Center for Nanoscience and Technology(NCNST) Beijing 100190China

In this review we describe a family of organic-based host frameworks which can accommodate guest molecules. The aim of the study is to test the adjustability of this class of mimic structures that may lead to new interesting functions. Emphasis of our research is placed upon four aspects: 1) thermal properties, 2) surface photochemistry, 3) fullerene adsorption, and 4) guest inclusion. It is envisioned that such approach of nanoporous molecular networks might be developed into a new family of useful soft frameworks for studies toward shape-selective catalysis, molecular recognition, self-assembly, and host-guest supramolecular chemistry.

关键词： molecular recognition self-assembly molecular template scanning tunneling microscopy(STM)

Interstitial concentration effects on incipient plasticity and dislocation behaviors of face-centered cubic FeNiCr multicomponent alloys based on nanoindentation

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Journal of Materials Science & Technology 2022年第17期112卷 212-221页

作者： Quanqing zeng Kefu Gan Fei chen Dongyao Wang Songsheng zeng Research Institute of Light Alloy Central South UniversityChangsha 410083China School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of the Ministry of Education of Nonferrous Metals Central South UniversityChangsha 410083China

Interstitial atoms that commonly occupy the octahedral or tetrahedral interstices of face-centered cubic(FCC)lattice,can significantly affect the dislocation behaviors on ***,interstitial doping has been applied to tune the mechanical properties of the emerging multicomponent,often termed high-entropy alloys(HEAs)or medium-entropy alloys(MEAs).However,the fundamental mechanisms of the dislocation nucleation and the onset of plasticity of interstitial multicomponent alloys governed by the concentration of interstitial atoms are still ***,in the present work,an instrumented nanoindentation was employed to investigate the interstitial concentration effects of carbon atoms on single FCC-phase equiatomic FeNiCr MEAs during *** results show that the pop-in events that denote the onset of incipient plasticity are triggered by the sudden heterogeneous dislocation nucleation via the primary atoms-vacancy exchange with the instant stress field,regardless of the interstitial ***,the measured activation volumes for dislocation nucleation of the FeNiCr MEAs are determined to be increased with the interstitial concentration,which definitely suggests the participation of interstitial atoms in the nucleation ***,it is also found that the average value measured in statistics of the maximum shear stress corresponding to the first pop-in is enhanced with the interstitial *** scenario can be attributed to the improved local change transfer and lattice cohesion caused by the interstitial atoms with higher ***,the significant drag effect of interstitial carbon atoms hinders the mobile dislocations before exhaustion,which severely suppresses the subsequent occurrence of pop-in events in the carbon-doped *** work gives a microscale view of interstitial effects on the mechanical properties of multicomponent alloys,which can further help to develop new interstitial strengthen

关键词： Multicomponent alloy Interstitial atoms Dislocation Nanoindentation pop-in Incipient plasticity