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International Journal of Minerals,Metallurgy and Materials 2020年第11期27卷 1482-1488页

作者： Jing-qun Yin Zhi-qiang zou Jun Tian Institute of Applied Chemistry Jiangxi Academy of SciencesNanchang 330029China School of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

Crystalline rare-earth(RE)carbonates having large particle size were prepared from the lixivium of weathered crust elution-deposited rare-earth ores using the precipitation method with ammonium bicarbonate as the *** chemical composition was studied using elemental and thermogravimetric analyses(TGA),and their structure and morphology were characterized using Fourier transform infrared(FTIR)spectroscopy,X-ray diffraction(XRD),and scanning electron microscopy(SEM).The results demonstrate that the crystalline rareearth carbonate is a hydrated basic carbonate or oxycarbonate and not astable intermediate carbonate in the process of thermal *** particle size of crystalline rare-earth carbonates with large particle size is in the range of 50–200μ*** an RE2O3 content of up to 95wt%,the quality of crystalline rare-earth carbonates is higher compared to the Chinese National Standard(GB/T 28882–2012).The quality of the product is superior to the Chinese National Standard.

关键词： rare-earth ores precipitation crystalline rare-earth carbonate large particle size

Brain Cognition Mechanism-Inspired Hierarchical Navigation Method for Mobile Robots

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Journal of Bionic Engineering 2024年第2期21卷 852-865页

作者： qiang zou Chengdong Wu Ming Cong Dong Liu Faculty of Robot Science and Engineering Northeastern UniversityShenyang110819China School of Mechanical Engineering Dalian University of TechnologyDalian116024China

Autonomous navigation is a fundamental problem in *** methods generally build point cloud map or dense feature map in perceptual space;due to lack of cognition and memory formation mechanism,traditional methods exist poor robustness and low cognitive *** a new navigation technology that draws inspiration from mammal’s navigation,bionic navigation method can map perceptual information into cognitive space,and have strong autonomy and environment *** improve the robot’s autonomous navigation ability,this paper proposes a cognitive map-based hierarchical navigation ***,the mammals’navigation-related grid cells and head direction cells are modeled to provide the robots with location *** then a global path planning strategy based on cognitive map is proposed,which can anticipate one preferred global path to the target with high efficiency and short ***,a hierarchical motion controlling method is proposed,with which the target navigation can be divided into several sub-target navigation,and the mobile robot can reach to these sub-targets with high confidence ***,some experiments are implemented,the results show that the proposed path planning method can avoid passing through obstacles and obtain one preferred global path to the target with high efficiency,and the time cost does not increase extremely with the increase of experience nodes *** motion controlling results show that the mobile robot can arrive at the target successfully only depending on its self-motion information,which is an effective attempt and reflects strong bionic properties.

关键词： Bionic navigation Spatial localization cells Global path planning Hierarchical motion controlling

Regulation of T cell immunity by cellular metabolism

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Frontiers of Medicine 2018年第4期12卷 463-472页

作者： Zhilin Hu qiang zou Bing Su Shanghai Institute of Immunology Department of Immunology and Microbiology Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education Shanghai Jiao Tong University School of Medicine Shanghai 200025 China

T cells are an important adaptive immune response arm that mediates cell-mediated immunity. T cell metabolism plays a central role in T cell activation, proliferation, differentiation, and effector function. Specific metabolic programs are tightly controlled to mediate T cell immune responses, and alterations in T cell metabolism may result in many immunological disorders. In this review, we will summarize the main T cell metabolic pathways and the important factors participating in T cell metabolic programming during T cell homeostasis, differentiation, and function.

关键词： T cell immunity metabolic pathways nutrient uptake metabolic checkpoints

Mode Conversion and Diffraction of Guided Optical Waves from Magnetostatic Waves under Inclined Bias Magnetic Field

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Communications in Theoretical Physics 2001年第10期36卷 497-502页

作者： WU Bao-Jian LIU Gong-qiang zou Zhi-qiang Department of Applied Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Applied Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Applied Physics Shanghai Jiao Tong University Shanghai 200030 China

The noncollinear interaction of guided optical waves with magnetostatic waves under inclined bias magnetic field is theoretically studied in detail. Similar approach can also be applied to the collinear interaction. Calculation results indicate that the diffraction efficiency (DE) in magnitude is equal to the mode-conversion efficiency (MCE) under vertical bias magnetic field, but they differ greatly under inclined bias magnetic field. By comparison to the case of vertical magnetization, the DE or the MCE can be greatly increased under inclined magnetic field. The characteristic of the DE curves obtained is basically in agreement with the experimental result.

关键词： guided optical wave, magnetostatic wave, mode conversion, diffraction efficiency

Tool path planning based on conformal parameterization for meshes

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Chinese Journal of Aeronautics 2015年第5期28卷 1555-1563页

作者： Zhao Jibin zou qiang Li Lun Zhou Bo Shenyang Institute of Automation Chinese Academy of Sciences University of Chinese Academy of Sciences

The similarity property of conformal parameterization makes it able to locally preserve the shapes between a surface and its parameter domain, as opposed to common parameterization methods. A parametric tool path planning method is proposed in this paper through such parameterization of triangular meshes which is furthermore based on the geodesic on meshes. The parameterization has the properties of local similarity and free boundary which are exploited to simplify the formulas for computing path parameters, which play a fundamentally important role in tool path planning, and keep the path boundary-conformed and smooth. Experimental results are given to illustrate the effectiveness of the proposed methods, as well as the error analysis.

关键词： Conformal parameterization Error analysis Local similarity:Tool path Triangular mesh

TOOL ORIENTATION PLANNING FOR FIVE-AXIS CNC MACHINING OF OPEN FREE-FORM SURFACES

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Journal of Systems Science & Complexity 2013年第5期26卷 667-675页

作者： ZHAO Jibin ZHONG Bo zou qiang LIU Hongjun Shenyang Institute of Automation Chinese Academy of Sciences University of Chinese Academy of Sciences School of Electromechanical Engineering Shenyang Aerospace University

For the geometry characteristics of open free-form surfaces,it is hard to consider global interference during the planning of feasible ***,the optimal kinematic orientation of tool axis will no longer be confined to the boundary of feasible *** this paper,according to the principle demanding that the tool should be fitted to a surface as close as possible and relevant processing parameters,a feasible domain of tool orientation for each cutter contact is planned in the local feed coordinates ***,these feasible domains of the tool orientation are transformed into the same coordinates system of the machine tool by the inverse kinematics *** linear equations based feasible domain method and Rosen gradient projection algorithm are used to improve the optimization process in precision and efficiency of the *** constructs the variation of tool orientation optimization model and ensures the smoothness of tool orientation *** and analysis of examples show that the proposed method has good kinematics performance and greatly improves the efficiency.

关键词： Feasible domains five-axis CNC machining open free-form surface planning tool orien-tation.

Risk Assessment of Highways Affected by Debris Flows in Wenchuan Earthquake Area

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Journal of Mountain Science 2013年第2期10卷 173-189页

作者： CUI Peng XIANG Ling-zhi zou qiang Institute of Mountain Hazards and Environment/Key Laboratory of Mountain Hazards and Earth Surface Process Chinese Academy of Sciences Chongqing Jiaotong University Graduate University Chinese Academy of Sciences College of Environmental and Resource Southwest University of Science and TechnologyChina

Since the Wenchuan earthquake in China on May 12th, 2008, highways in earthquake-affected areas have been frequently interrupted by debris flows. We analyzed the hazard effect modes and damage processes along highways and developed three key indexes, scale of debris flows, deposits on highways and river blockage, to describe quantitatively the highway disasters. By combining the empirical methods and the actual terrain conditions, we proposed new methods to determine the value of hazard indexes. In addition, we used the economic value and resistance of highway as vulnerability assessment indexes, then determined the specific subindexes for the subgrade, bridges and culverts, and developed a way for the quantified vulnerability zoning. Moreover, we proposed the assessment and mapping methods for highway risk. The risk is described into 5 grades： extremely low risk, low risk, middle risk, high risk and extremely high risk. We applied these methods in a case study carried out on provincial highway S3o3 from Yingxiu Town to Wolong Town, in Wenchuan County. Analysis of debris flow risk for the whole highway, showed that the total length of highway in extremely low risk area was 28.26 km, 4.83 km in low risk area, 8.0 km in middle risk area, 3.65 km in high risk area, and 3.06 km in extremely high risk area. The assessment results are consistent with the field survey data which reflected the disaster situation. This risk method can be used objectively to evaluate the debris-flow risk along highways, and is useful for highway reconstruction in mountainous areas suffering from active debris flows.

关键词： Debris flow Highway disaster Hazardanalysis Vulnerability analysis Risk analysis Wenchuan earthquake

Risk Assessment of Debris Flows Along the Karakoram Highway (Kashgar‑Khunjerab Section) in the Context of Climate Change

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International Journal of Disaster Risk Science 2023年第4期14卷 586-599页

作者： Yamei Li qiang zou Jiansheng Hao Lijun Su State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China Key Laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China China-Pakistan Joint Research Center on Earth Sciences Islamabad 45320Pakistan Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The Karakoram highway(KKH)is renowned for its complex natural environment and geological *** climate changes drastically and directly infuences the frequency and magnitude of debris fows in this region,resulting in signifcant casualties and economic ***,the risk assessment of debris fows along the KKH in the context of climate change has been rarely ***,in this study we used the debris fow data,historical meteorological data and future climate prediction data to assess the debris fow risk of the study region during the baseline period(2009–2018),2025s(2021–2030),2035s(2031–2040)and 2045s(2041–2050)under the Representative Concentration Pathway 8.5 *** results show that the risk of debris fows increases with climate change,with the highest risk level in the *** diferent parts of this highway,the upper reaches of the Ghez River and the second half of Tashkorgan-Khunjerab are the sections with the highest *** fndings are helpful for debris fow prevention and can ofer coping strategies for the existing line of the *** also provide some reference for the renovation,improvement,operation,and maintenance of the KKH.

关键词： Climate change Debris fows Karakoram highway Risk assessment

Chromones from an ascomycete,Chaetomium aureus

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Chinese Chemical Letters 2010年第10期21卷 1203-1205页

作者： Li Mei Li qiang zou Guo You Li Scientific Research Center Chengdu Medical College Chengdu 610083 China Chengdu Institute of Biology Chinese Academy of Sciences Chengdu 610041 China

A novel chromone, named chaetoaurin （1）, along with six known chromone derivatives （2-7）, was isolated from the ethyl acetate extract of a solid-state fermented culture of Chaetomium aureus. Their structures were ... 详细信息

关键词： Chaetomium aureus Chaetomiaceae Chromone Chaetoaurin

Characteristics of Clustering Debris Flows in Wenchuan Earthquake Zone

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Journal of Mountain Science 2013年第6期10卷 953-961页

作者： MA Chao HU Kai-heng zou qiang TIAN Mi Key Laboratory of Mountain Hazards and Earth Surface Processes Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chinese Academy of Sciences Graduate school of Chinese Academy of Science

Clustering debris-flow events, namely many debris flows simultaneously triggered by a regional rainstorm in a large-scale mountainous area,occurred in four regions of Wenchuan earthquake stricken areas in 2008 and 2010. The characteristics of the clustering debris flows are examined with regard to triggering rainfall, formation process, and relationship with the earthquake by field survey and remote sensing interpretation. It is found that the clustering events occurred nearly at the same time with the local peak rainstorms, and the rainfall intensity-duration bottom limit line for clustering debris flows is higher than the worldwide line. It means that more rainfall is needed for the occurrence of the clustering debris flows. Four kinds of major formation processes for these debris flows are summarized: tributary-dominated, mainstreamdominated, transformation from slope failures, and mobilization or liquefaction of landslide. The four regions has a spatial correlation with the strongquake-influenced zone with the peak ground acceleration = 0.2 g and the seismic intensity > X.

关键词： Clustering debris flows Wenchuanearthquake Rainfall threshold Formation process