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Dislocation-mediated migration of interphase boundaries

Journal of Materials Science & Technology 2019年第11期35卷 2714-2726页

作者： zhipeng sun Fuzhi Dai Ben Xu Wenzheng Zhang School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Science and Technology of Advanced Functional Composite Laboratory Aerospace Research Institute of Materials and Processing TechnologyBeijing 100076China Key Laboratory of Advanced Materials(MOE) State Key Laboratory of New Ceramics and Fine ProcessingChina

Faceted interphase boundaries(IPBs)are commonly observed in lath-shaped precipitates in alloys consisting of simple face-centred cubic(fcc),body centred-cubic(bcc)or hexagonal closed packed(hcp)phases,which normally contain one or two sets of parallel *** influence of these dislocations on interface migration and possible accompanying long-range strain field remain *** elucidate this,we carried out atomistic simulations to investigate the dislocation-mediated migration processes of IPBs in a pure-iron *** results show that the migration of these IPBs is accompanied with the slip of interfacial dislocations,even in high-index slip planes,with two migration modes were observed:the first mode is the uniform migration mode that occurs only when all of the dislocations slip in a common slip plane.A shear-coupled interface migration was observed for this *** other interfaces propagate in the stick-slip migration mode that occurs when the dislocations glide on different slip planes,involving dislocation reaction or tangling.A quantitative relationship was established to link the atomic displacements with the dislocation structure,slip plane,and interface *** macroscopic shear deformation due to the effect of overall atomic displacement shows a good agreement with the results obtained based on the phenomenological theory of martensite *** findings have general implications for the understanding of phase transformations and the surface relief effect at the atomic scale.

关键词： Interphase boundary migration O-line interface Shear-coupled interface migration Dislocation gliding Atomic displacement

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Sequence Stratigraphy and Sedimentary Facies of Lower Oligocene Yacheng Formation in Deepwater Area of Qiongdongnan Basin,Northern South China Sea:Implications for Coal-Bearing Source Rocks

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Journal of Earth Science 2014年第5期25卷 871-883页

作者： Jinfeng Ren Hua Wang Ming sun Huajun Gan Guangzeng Song zhipeng sun Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences Faculty of Earth Resources China University of Geosciences Guangzhou Marine Geological Survey Zhanjiang Branch of CNOOC Limited

For unveiling coal-bearing source rocks in terrestrial-marine transitional sequences, the sequence stratigraphic framework and sedimentary facies of Lower Oligocene Yacheng Formation of Qiongdongnan Basin were investigated using seismic profiles, complemented by well bores and cores. Three third-order sequences are identified on the basis of unconformities on basin margins and correlative conformities in the basin center, namely SQYC3, SQYC2 and SQYC1 from bottom to top. Coal measure in Yacheng Formation of Qiongdongnan Basin were deposited within a range of facies associations from delta plain/tidal zone to neritic sea, and three types of favourable sedimentary facies associations for coal measure were established within the sequence stratigraphic framework, including braided delta plain and alluvial fan, lagoon and tidal flat, and fan delta and coastal plain facies associations. Results shown that, in the third-order sequences, coal accumulation in landward areas（such as delta plain） of the study area predominantly correlates with the early transgressive systems tract（TST） to middle highstand systems tract（HST）, while in seaward areas（such as tidal flat-lagoon） it correlates with the early TST and middle HST. The most potential coal-bearing source rocks formed where the accommodation creation rate（Ra） and the peat-accumulation rate（Rp） could reach a state of balance, which varied among different sedimentary settings. Furthermore, intense tectonic subsidence and frequent alternative marine-continental changes of Yacheng Formation during the middle rift stage were the main reasons why the coal beds shown the characteristics of multi-beds, thin single-bed, and rapidly lateral changes. The proposed sedimentary facies associations may aid in predicting distribution of coal-bearing source rocks. This study also demonstrates that controlling factors analysis using sequence stratigraphy and sedimentology may serve as an effective approach for coal-bearing characteristics

关键词： Qiongdongnan Basin Yacheng Formation sequence stratigraphy sedimentary facies,coal measure.

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Structure and kinematic analysis of the deepwater area of the Qiongdongnan Basin through a seismic interpretation and analogue modeling experiments

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Acta Oceanologica Sinica 2015年第4期34卷 32-40页

作者： sun Zhen WANG Zhenfeng sun zhipeng WANG Zhangwen ZHANG Wei HE Lijuan Key Laboratory of Chinese Academy of Sciences for Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of Sciences Zhanjiang Branch of China National Offshore Oil Corporation Limited Shandong Province Geological Prospecting Institute China Chemical Geology and Mine Bureau

Located at the northwest continental slope of the South China Sea, the Qiongdongnan Basin bears valley-shaped bathymetry deepening toward east. It is separated from the Yinggehai Basin through NW-trending Indo-China-Red River shear zone, and connected with NW subsea basin through the Xisha Trough. Along with the rapid progress of the deepwater exploration, large amounts of high resolution geophysical and geological data were accumulated. Scientific researches about deepwater basins kept revealing brand new tectonic and sedimentary discoveries. In order to summarize the structural features and main controlling factors of the deepwater Qiongdongnan Basin, a series of researches on basin architecture, fault activities, tectonic deformation and evolution were carried out. In reference to analogue modeling experiments, a tectonic situation and a basin formation mechanism were discussed. The researches indicate that：the northern boundary of the Qiongdongnan Basin is strongly controlled by No. 2 fault. The overlapping control of two stress fields from the east and the west made the central depression zone extremely thinned. Combined with the changed stress field, the segmentation of a preexisting weakness zone made the sags in the east experiencing different rifting histories from the west ones. The NE-trending west segment of the Qiongdongnan Basin experienced strong rifting during Eocene, while the roughly EW-trending sags in the east segment show strong rifting during late Eocene and early Oligocene. Local structures such as NW-trending basal fault and inherited uplifts controlled the lateral segmentation. So first order factors such as regional stress field and preexisting weakness zone controlled the basin zonation, while the second order factors determined the segmentation from east to west.

关键词： rifting structure basin formation mechanism profile interpretation analogue modeling experiments Qiongdongnan Basin

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Structural Gender Inequality and Mental Health among Chinese Men and Women

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International Journal of Mental Health Promotion 2023年第1期25卷 31-43页

作者： Lei Yang zhipeng sun Department of Sociology School of Ethnology and SociologyMinzu University of ChinaBeijing100081China Department of Interdisciplinary Social Science Faculty of Social and Behavioral SciencesUtrecht UniversityUtrecht3508TCThe Netherlands Shanghai CSW&MSM Center(SCMC) Shanghai200023China

Little is known about the association between structural gender inequality and health in patriarchal *** study employed a sample from the Chinese Women’s Social Status,consisting of 26,139 participants aged 18 and 70 years(13,494 women and 12,645 men).Structural gender inequality was assessed at the macro-,meso-,and *** health was measured by the summed scores of eight questions on depressive *** linear regression was applied for *** showed that total sex ratio at birth was associated with poorer mental health among women and men but sex ratio at birth of the second-born child predicted better mental *** inequality at meso-level resulted in poorer mental health and gender inequality at micro-level was associated with poorer mental health both for men and *** structural gender inequality promotes populations’mental health in China.

关键词： Structural gender inequality patriarchy mental health men and women social determinants

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Field theoretical approach to spin models

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Frontiers of physics 2021年第6期16卷 109-115页

作者： Feng Liu Zhenhao Fan zhipeng sun Xuzong Chen Dingping Li School of Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China

We developed a systematic non-perturbative method base on Dyson–Schwinger theory and theΦ-derivable theory for Ising model at broken *** on these methods,we obtain critical temperature and spin spin correlation beyond mean field *** spectrum of Green function obtained from our methods become gapless at critical point,so the susceptibility become divergent at *** critical temperature of Ising model obtained from this method is fairly good in comparison with other non-cluster *** is straightforward to extend this method to more complicate spin models for example with continue symmetry.

关键词： Ising model mean field theory Dyson–Schwinger equations

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Kinetics and model of gas generation of source rocks in the deepwater area, Qiongdongnan Basin

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Acta Oceanologica Sinica 2015年第4期34卷 11-18页

作者： HUANG Baojia HUANG Hao WANG Zhenfeng HUANG Yiwen sun zhipeng Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Limited China University of Petroleum

In order to investigate the hydrocarbon generation process and gas potentials of source rocks in deepwater area of the Qiongdongnan Basin, kinetic parameters of gas generation （activation energy distribution and frequency factor） of the Yacheng Formation source rocks （coal and neritic mudstones） was determined by thermal simulation experiments in the closed system and the specific KINETICS Software. The results show that the activation energy （Ea） distribution of C1–C5 generation ranges from 50 to 74 kcal/mol with a frequency factor of 2.4×1015 s–1 for the neritic mudstone and the Ea distribution of C1–C5 generation ranges from 49 to 73 kcal/mol with a frequency factor of 8.92×1013 s–1 for the coal. On the basis of these kinetic parameters and combined with the data of sedimentary burial and paleothermal histories, the gas generation model of the Yacheng Formation source rocks closer to geological condition was worked out, indicating its main gas generation stage at Ro （vitrinite reflectance） of 1.25%–2.8%. Meanwhile, the gas generation process of the source rocks of different structural locations （central part, southern slope and south low uplift） in the Lingshui Sag was simulated. Among them, the gas generation of the Yacheng Formation source rocks in the central part and the southern slope of the sag entered the main gas window at 10 and 5 Ma respectively and the peak gas generation in the southern slope occurred at 3 Ma. The very late peak gas generation and the relatively large gas potential indices （GPI：20×10^8–60×10^8 m^3/km^2） would provide favorable conditions for the accumulation of large natural gas reserves in the deepwater area.

关键词： Yacheng Formation source rock gas generation kinetics gas generation model deepwater area Qiongdongnan Basin

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Quantitative trait loci for morphometric traits in multiple families of common carp(Cyprinus carpio)

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Science China(Life Sciences) 2017年第3期60卷 287-297页

作者： Xianhu Zheng Youyi Kuang Weihua Lv Dingchen Cao zhipeng sun Wu Jin Xiaowen sun Heilongjiang River Fisheries Research Institute Chinese Academy of Fishery SciencesHarbin 150070China College of Life Science Northeast Agricultural UniversityHarbin 150030China Freshwater Fisheries Research Center Chinese Academy of Fishery SciencesWuxi 214081China

Quantitative trait locus(QTL) mapping is frequently used to understand the genetic architecture of quantitative ***,we performed a genome scanfor QTL affecting the morphometric characters in eight full-sib families containing 522 individuals using different statistical methods(Sib-pair and half-sib model).A total of 194 QTLs were detected in 25 different regions on 10 linkage groups(LGs).Among them,37 QTLs on five LGs(eight,13,24,40 and 45) were significant(5%genome-wide level),while the remaining 40(1%chromosome-wide level) and 117(5%chromosome-wide level) indicated suggestive effect on those *** for most morphometric traits were moderate to high,ranging from 0.21 to 0.66,with generally strong phenotypic and genetic correlations between the traits.A large number of QTLs for morphometric traits were co-located,consistent with their high correlations,and may reflect pleiotropic effect on the same *** pathways were mapped for possible candidate genes on QTL *** significantly enriched pathway was identified onLG45,which had a P-value of 0.04 and corresponded to the "regulation of actin cytoskeleton pathway".The results are expected to be useful in marker-assisted selection(MAS) and provide valuable information for the study of gene pathway for morphometric and growth traits of the common carp.

关键词： common carp morphometric traits QTL heritability pathway

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Comparative Study on Traction Battery Charging Strategies from the Perspective of Material Structure

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Automotive Innovation 2022年第4期5卷 427-437页

作者： Mengyang Gao Liduo Chen Tianyi Ma Weijian Hao zhipeng sun Yuhan sun Shiqiang Liu China Automotive Technology and Research Center Co.Ltd Tianjin 300300China CAT ARC NEV Test Center(Tianjin)Co.Ltd Tianjin 300300China

The service life of an electric vehicle is,to some extent,determined by the life of the traction battery.A good charging strat-egy has an important impact on improving the cycle life of the lithium-ion ***,this paper presents a comparative study on the cycle life and material structure stability of lithium-ion batteries,based on typical charging strategies currently applied in the market,such as constant current charging,constant current and constant voltage charging,multi-stage constant current charging,variable current intermittent charging,and pulse *** with the reference charging strategy,the charging capacity of multi-stage constant current charging reaches 88%.Moreover,the charging time is reduced by 69%,and the capacity retention rate after 500 cycles is 93.3%.Through CT,XRD,SEM,and Raman spectroscopy analysis,it is confirmed that the smaller the damage caused by this charging strategy to the overall structure of the battery and the layered structure and particle size of the positive electrode material,the higher the capacity retention rate *** work facilitates the development of a better charging strategy for a lithium-ion battery from the perspective of material structure.

关键词： Traction battery Charging strategy Cycle life Material evolution

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Paleogene Tectonic Evolution Controls on Sequence Stratigraphic Patterns in the Central Part of Deepwater Area of Qiongdongnan Basin, Northern South China Sea

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Journal of Earth Science 2014年第2期25卷 275-288页

作者： Guangzeng Song Hua Wang Huajun Gan zhipeng sun Xiaolong Liu Meng Xu Jinfeng Ren Ming sun Di sun Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences Faculty of Earth Resources China University of Geosciences Research Institute of China National Offshore Oil Corporation Ltd.-Zhanjiang Research Institute of China National Offshore Oil Corporation Ltd. Shandong Province Experimental Institute of Geological Sciences Key Laboratory of Gold Mineralization Process and Resources Utilization Ministry of Land and Resources Petroleum Development Centre Shengli Oilfield Company SINOPEC

In active rift basins, tectonism is extremely important for sequence stratigraphic patterns, affecting both the sequence architecture and internal makeup. Sequence stratigraphic framework of a Paleogene rift succession in Qiongdongnan Basin, northern South China Sea, was built using seismic profiles, complemented by well logs and cores. One first-order and three second-order sequences were identified on the basis of basin-scale unconformities, and seven third-order sequences are defined by unconformities along the basin margins and correlative conformities within the central basin. Through unconformity analysis and backstripping procedure, the Paleogene synrift tectonic evolution of deep- water area of Qiongdongnan Basin was proved to be episodic, which can be divided into rifting stage-I, rifting stage-II and rifting stage-III. Episodic rifting resulted in the formation of various types of struc- tural slope break belts, which controlled different architectures and internal makeup of sequences. This study enhances the understanding of the control of tectonic evolution on sequence stratigraphic pat- terns and establishes relevant patterns in a typical rift basin, and further proposes the favorable sand- stone reservoirs developing in different sequence stratigraphic patterns, which will be pretty helpful for subtle pool exploration in deepwater area of petroliferous basins.

关键词： South China Sea deepwater area tectonic evolution structural slope break belt se-quence stratigraphic pattern.

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Fast-Charging Sodium-Ion Batteries Enabled by Molecular-Level Designed Nitrogen and Phosphorus Codoped Mesoporous Soft Carbon

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Research 2024年第2期2023卷 329-337页

作者： Lei Liu Zhuzhu Du Jiaqi Wang Hongfang Du Sheng Wu Mengjun Li Yixuan Zhang Jinmeng sun zhipeng sun Wei Ai Frontiers Science Center for Flexible Electronics(FSCFE)and Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi'an 710072China Fujian Cross Strait Institute of Flexible Electronics(Future Technologies) Fujian Normal UniversityFuzhou 350117China School of Materials and Energy Guangdong University of TechnologyGuangzhou510006 GuangdongChina

Soft carbons have attracted extensive interests as competitive anodes for fast-charging sodium-ion batteries(SIBs);however,the high-rate performance is still restricted by their large ion migration barriers and sluggish reaction ***,we show a molecular design approach toward the fabrication of nitrogen and phosphorus codoped mesoporous soft carbon(NPSC).The key to this strategy lies in the chemical cross-linking reaction between polyphosphoric acid and p-phenylenediamine,associated with pyrolysis induced in-situ self-activation that creates mesoporous structures and rich heteroatoms within the carbon *** to the enlarged interlayer spacing,reduced ion diffusion length,and plentiful active sites,the obtained NPSC delivers a superb rate capacity of 215 mAh g-1 at 10 A g-1 and an ultralong cycle life of 4,700 cycles at 5 A g^(-1).Remarkably,the full cell shows 99%capacity retention during 100 continuous cycles,and maximum energy and power densities of 191 Wh kg^(-1)and 9.2 kW kg^(-1),*** believe that such a synthetic protocol could pave a novel venue to develop soft carbons with unique properties for advanced SIBs.

关键词： kinetics carbons linking

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