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Coupled thermal-mechanical analysis of two ITER-like first wall mockups under heat shock of plasma disruptions

Science China(Technological Sciences) 2016年第3期59卷 476-487页

作者： HUANG ShengHong zhao yongqiang WANG WeiHua School of Engineering Science University of Science and Technology of China Institute of Applied Physics of Army Office Academic

The first wall of the fusion reactor is a plasma-facing component and is a key link to maintain the integrity of structure during thermal shock induced by plasma disruptions. Be and W/Cu functionally graded materials are two kinds of important plas- ma-facing materials （PFM） of first wall in fusion reactor currently. Previous researches seldom comparatively evaluated the normal servicing and heat shock resistance performance of first walls with those two kinds of PFMs. And also there lacks cou- pled thermal/mechanical analysis on the heat shock process in consideration of multiple thermal/mechanical phenomena, such as material melting, solidification, evaporation, etc., which is significant to further understand the heat shock damage mecha- nism of the first wall with different PFMs. With the aim of learning more detailed mechanical mechanism of thermal shock damage and then improving the thermal shock resistance performance of different first wall designs, the coupled ther- mal/mechanical response of two typical ITER-like first walls with PFM of Be and functionally graded W-Cu respectively un- der the heat shock of 1 2 GW/m2 are computed by the finite element method. Special considerations of elastic-plastic defor- mation, material melting, and solidification are included in numerical models and methods. The mechanical response behaviors of different structures and materials under the normal servicing operation as well as plasma disruption conditions are analyzed and investigated comparatively. The results reveal that heat is mainly deposited on the PFM layer in thc high energy shock pulse induced by plasma disruptions, resulting in complex thermal stress change as well as mechanical itTeversible damage of thermal elastic and plastic expansion, contraction and yielding. Compared with the first wall with Be PFM, which mitigates the damages from heat shock at most only in the PFM layer with cost of whole PFM layer plastic yielding, the first wall with graded W-Cu PFM

关键词： first wall plasma facing component plasma disruptions thermal shock resistance finite element method

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Comparison of Carbon, Nitrogen, and Sulfur in Coastal Wetlands Dominated by Native and Invasive Plants in the Yancheng National Nature Reserve, China

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Chinese Geographical Science 2020年第2期30卷 202-216页

作者： WAN Siang LIU Xingtu MOU Xiaojie zhao yongqiang Northeast Institute of Geography and Agroecology Chinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Administration of Yancheng National Natural Reserve Yancheng 224002China

The rapid invasion of the plant Spartina alterniflora in coastal wetland areas can threaten the capacity of their soils to store carbon(C),nitrogen(N),and sulfur(S).In this study,we investigated the spatial and temporal distribution patterns of C,N and S of both soil and(native and invasive)plants in four typical coastal wetlands in the core area of the Yancheng National Nature Reserve,*** results show that the invasive *** greatly influenced soil properties and increased soil C,N and S storage capacity:the stock(mean±standard error)of soil organic carbon(SOC,(3.56±0.36)kg/m^3),total nitrogen(TN,(0.43±0.02)kg/m^3),and total sulfur(TS,(0.69±0.11)kg/m^3)in the *** marsh exceeded those in the adjacent bare mudflat,Suaeda salsa marsh,and Phragmites australis *** of its greater biomass,plant C((1193.7±133.6)g/m^2),N((18.8±2.4)g/m^2),and S((9.4±1.5)g/m^2)storage of *** was also larger than those of co-occurring native *** biogenic elements circulated in the soil-plant system of the *** marsh,and their spatial and temporal distribution patterns were also changed by the *** *** properties changed by ***’s invasion thereby indirectly affected the accumulation of soil C,N and S in this wetland *** SOC,TN,and TS contents were positively correlated with soil electrical conductivity and moisture,but negatively correlated with the pH and bulk density of ***,these results indicate that *** invasion altered ecosystem processes,resulted in changes in net primary production and litter decomposition,and increased the soil C,N and S storage capacity in the invaded ecosystems in comparison to those with native tallgrass communities in the coastal wetlands of East China.

关键词： coastal wetland plant invasion Spartina alterniflora soil carbon soil nitrogen soil sulfur

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Combination of classifiers with incomplete frames of discernment

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Chinese Journal of Aeronautics 2022年第5期35卷 145-157页

作者： Zhunga LIU Jingfei DUAN Linqing HUANG Jean DEZERT yongqiang zhao School of Automation Northwestern Polytechnical UniversityXi’an 710072China ONERA–The French Aerospace Lab Palaiseau 91761France

The methods for combining multiple classifiers based on belief functions require to work with a common and complete(closed)Frame of Discernment(Fo D)on which the belief functions are defined before making their *** theoretical requirement is however difficult to satisfy in practice because some abnormal(or unknown)objects that do not belong to any predefined class of the Fo D can appear in real classification *** classifiers learnt using different attributes information can provide complementary knowledge which is very useful for making the classification but they are usually based on different Fo *** order to clearly identify the specific class of the abnormal objects,we propose a new method for combination of classifiers working with incomplete frames of discernment,named CCIF for *** is a progressive detection method that select and add the detected abnormal objects to the training data *** one pattern can be considered as an abnormal object by one classifier and be committed to a specific class by another one,a weighted evidence combination method is proposed to fuse the classification results of multiple *** new method offers the advantage to make a refined classification of abnormal objects,and to improve the classification accuracy thanks to the complementarity of the *** experimental results are given to validate the effectiveness of the proposed method using real data sets.

关键词： Abnormal object Belief functions Classifier fusion Evidence theory Detection

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Finite Element Modeling and Vibration Analysis of Sprag Clutch⁃Flexible Rotor System

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Journal of Harbin Institute of Technology(New Series) 2022年第2期29卷 13-23页

作者： Chuang Huang yongqiang zhao Guanghu Jin School of Mechatronics Engineering Harbin Institute of TechnologyHarbin 150001China Gree Electric Appliances Inc.of ZhuhaiZhuhai 519070GuangdongChina National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China

To study the overall vibration characteristics of the sprag clutch⁃flexible rotor system(SC⁃FRS)under high⁃speed operating conditions,a finite element model of SC⁃FRS considering rotor flexibility and bearing support stiffness was established based on the proposed calculation method of the stiffness *** to this model,the natural frequency and mode shape of the system are calculated,and the correctness of the model was verified by comparing it with the calculation results of ANSYS *** the action of unbalance,the bending⁃torsion coupled vibration and the dynamic load of the inter⁃shaft bearings were analyzed,and it is found that the resonant peak in the torsional direction has the same resonance frequency as that in the bending direction.A test rig for the sprag clutch⁃rotor system was built,and the axis trajectory and critical speed were *** test results show that the finite element model of SC⁃FRS can accurately describe the vibration characteristics of the *** coupling vibration characteristics analysis of the sprag clutch⁃flexible rotor system can provide theoretical guidance for the dynamic design of the sprag clutch components.

关键词： sprag clutch⁃rotor system finite element model unbalanced mass experimental verification

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On a certain non-split cubic surface

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Science China Mathematics 2019年第12期62卷 2435-2446页

作者： Regis de la Breteche Kevin Destagnol Jianya Liu Jie Wu yongqiang zhao Institut de Mathematiques de Jussieu Universite Paris-DiderotParis 75205France IST Austria Klosterneuburg 3400Austria School of Mathematics Shandong UniversityJinan 250100China Laboratoire d'Analyse et de Mathematiques Appliquees Univer site Paris-Est CreteilCNRSUMR 8050Creteil 94010France School of Science Westlake UniversityHangzhou 310024China

This paper establishes an asymptotic formula with a power-saving error term for the number of rational points of bounded height on the singular cubic surface of P3 Qgiven by the following equation x0（x12+ x22）-x33= ... 详细信息

关键词： Manin-Peyre conjecture rational points singular cubic surface non-split toric surface descent on torsors asymptotic formula

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Lipid Oxidation and Fatty Acid Composition in Salt-Dried Yellow Croaker(Pseudosciaena polyactis) During Processing

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Journal of Ocean University of China 2017年第5期16卷 855-862页

作者： CAI Qiuxing WU Yanyan LI Laihao WANG Yueqi YANG Xianqing zhao yongqiang College of Food Science and Engineering Ocean University of China Key Laboratory of Aquatic Product Processing Guangdong provincial Key Laboratory of Fishery Ecology EnvironmentMinistry of Agriculture National Research and Development Center for Aquatic Product Processing South China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences College of Food Engineering Qinzhou University

Lipid oxidation in salt-dried yellow croaker(Pseudosciaena polyactis) was evaluated during processing with commonly used analytical indices, such as the peroxide value(POV), the thiobarbituric acid reactive substances(TBARS) value, and oxidative-relative lipoxygenase(LOX) activity. Additionally, fatty acids were analyzed using gas chromatography-mass spectrometry. Both POV and TBARS increased significantly(P 0.931.

关键词： Pseudosciaena yellow PUFA Lipid constantly varied saturated dried lipoxygenase extremely

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Determination of Hydrocarbon Charging History by Diagenetic Sequence and Fluid Inclusions:A Case Study of the Kongquehe Area in the Tarim Basin

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 876-886页

作者： WANG Bin FENG Yong zhao yongqiang ZHOU Yushuang LUO Yu ZHANG Genfa Wuxi Research Institute of Petroleum Geology SINOPEC School of Geosciences Yangtze University Research Institute of Exploration and Development Northwest Oilfield Branch CompanySINOPEC

Petrographic analysis of hydrocarbon inclusions in reservoirs is the basis and prerequisite for study of hydrocarbon charge history using fluid inclusion *** from Silurian reservoirs in the Kongquehe area were studied with microscopy,cathode luminescence and scanning electron microscopy,and the paragenetic sequence of diagenetic events was *** and oil inclusions were found in four different occurrences,i.e.,① in healed cracks in detrital quartz grains,② in quartz overgrowths that were formed relatively early in diagenesis,③ in healed cracks crosscutting quartz overgrowths and detrital quartz,and ④ in paragenetically late calcite *** bitumens were found in intergranular pores and in late fractures,whereas gas inclusions occur in healed cracks crosscutting quartz overgrowths and detrital *** homogenization temperatures of aqueous（Th_（aq）） and oil incluisons（Th_0） within individual fluid inclusion assemblages are very consistent,suggesting that the microthermometric data are *** Th_（aq） values are generally larger than Th_0,indicating the oil charging events took place at significant *** results suggest that there were at least two episodes of hydrocarbon charging in the Kongquehe area：the early hydrocarbon charging occurred in late Caledonian,dominated by oil,and the late hydrocarbon charging occurred in the Yanshan-Himalayan,first by oil and then *** addition,two episodes of hydrocarbon reservoir adjustment and destruction occurred in the Hercynian and Himalayan,respectively,forming solid bitumen.

关键词： Fluid inclusion diagenetic sequence hydrocarbon charge history Kongquehe area TarimBasin

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Journal of Harbin Institute of Technology(New Series) 2020年第1期27卷 1-9页

作者： Jinbao Zhang yongqiang zhao Lingxian Kong Ming Liu School of Mechatronics Engineering Harbin Institute of Technology

Bearings are crucial components in rotating machines,which have direct effects on industrial productivity and *** fast and accurately identify the operating condition of bearings,a novel method based on multi⁃scale permutation entropy(MPE)and morphology similarity distance(MSD)is proposed in this ***,the MPE values of the original signals were calculated to characterize the complexity in different scales and they constructed feature vectors after ***,the MSD was employed to measure the distance among test samples from different fault types and the reference samples,and achieved classification with the minimum ***,the proposed method was verified with two experiments concerning artificially seeded damage bearings and run⁃to⁃failure bearings,*** categories were considered for the two experiments and high classification accuracies were *** experimental results indicate that the proposed method is effective and feasible in bearing fault diagnosis.

关键词： bearing fault diagnosis multi⁃scale permutation entropy morphology similarity distance

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Tandem Lewis acid catalyzed coupling/semipinacol rearrangement of allylic alcohol

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Science China Chemistry 2010年第1期53卷 147-150页

作者： YUAN DaoYi,ZHANG yongqiang,TU yongqiang,CHEN ZhiHua & zhao Xiong State Key Laboratory of Applied Organic Chemistry Department of Chemistry,Lanzhou University,Lanzhou 730000,China State Key Laboratory of Applied Organic Chemistry Department of Chemistry Lanzhou University Lanzhou China

Construction of the polyaryl quaternary unit through a ZnBr2 catalyzed tandem coupling/semipinacol rearrangement participated by allylic cations was reported for the first time.

关键词： coupling semipinacol rearrangement allylic cation quaternary center

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A New Ootype of Dinosaur Egg (Faveoloolithidae： Duovallumoolithus shangdanensis oogen, et oosp. nov.) from the Late Cretaceous in the Shangdan Basin, Shaanxi Province, China

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 897-903页

作者： ZHENG Tingting BAI Yi WANG Qiang ZHU Xufeng FANG Kaiyong YAO Yuan zhao yongqiang WANG Xiaolin Shaanxi Nature Museum Xi 'an 710069 China Key Laboratory of Vertebrate Evolution and Human Origin of Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044 China University of Chinese Academy of Sciences Beijing 100049 China China University of Geosciences School of Earth Sciences and Resources Beijing 100083 China

A new ootype collected from the Upper Cretaceous Lijiacun Formation in the Shangdan Basin,Shaanxi Province is described in this paper. Based on general external shape, size, eggshell thickness and honeycomb-like eggshell microstructure, eggs are referable to the oofamily Faveoloolithidae. Compared with other members of Faveoloolithidae, specimens described in this paper show special characteristics:adjacent pores are usually separated by two eggshell units between which often develop interspaces;columnar eggshell units are relatively closely arranged in radial view. According to these characteristics,we erect a new oogenus and a new oospecies: Duovallumoolithus shangdanensis oogen. et oosp. nov. The new discovery expands the diversity of Faveoloolithidae.

关键词： dinosaur egg Faveoloolithidae Late Cretaceous Shangdan Basin Shaanxi Province China

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