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On the Geodynamic Mechanism of Episodic Uplift of the Tibetan Plateau during the Cenozoic Era

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Acta Geologica Sinica(English Edition) 2014年第2期88卷 699-716页

作者： wang Guocan CAO Kai wang An SHEN Tianyi ZHANG Kexin wang liquan State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Center for Global Tectonics China University of Geosciences School of Earth Sciences China University of Geosciences Key Laboratory of Biological and Environmental Geology of Ministry of Education China University of Geosciences Chengdu Institute of Geology and Minerals Resources

Multi-stage uplift of the Tibetan Plateau during the Cenozoic implies a complex geodynamic *** this paper,we review main geodynamic models for the uplift of the plateau,and,in particular,analyze the spatio-temporal framework of the Cenozoic deformation structures,which are closely related to the deep geodynamic mechanism for the plateau *** this perspective,significant change of the deformation regime over the Tibetan Plateau occurred by the middle-late Miocene,while thrust and thrust-folding system under NS compression was succeded by extension or ***,a series of large-scale strike-slip faults commenced or was kinemtically *** on a systematic synthesis of the structure deformation,magmatism,geomorphological process and geophysical exploration,we propose a periodical model of alternating crustal compression and extension for episodic uplift of the Tibetan Plateau.

关键词： Tibetan Plateau Cenozoic episodic uplift geodynamic mechanism

ADAPTIVE FEED-FORWARD COMPENSATOR FOR HARMONIC CANCELLATION IN ELECTRO-HYDRAULIC SERVO SYSTEM

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Chinese Journal of Mechanical Engineering 2008年第1期21卷 77-81页

作者： YAO Jianjun wang liquan JIANG Hongzhou WU Zhenshun HAN Junwei College of Mechanical and Electrical Engineering Harbin Engineering University Harbin 150001 China School of Mechatronics Engineering Harbin Institute of Technology Harbin 150001 China

Since the dead zone phenomenon occurs in electro-hydraulic servo system, the output of the system corresponding to a sinusoidal input contains higher harmonic besides the fundamental input, which causes harmonic distortion of the output signal. The method for harmonic cancellation based on adaptive filter is proposed. The task is accomplished by generating reference signals with frequency that should be eliminated from the output. The reference inputs are weighted by the adaptive filter in such a way that it closely matches the harmonic. The output of the adaptive filter is a harmonic replica and is injected to the fundamental signal such that the output harmonic is cancelled leaving the desired signal alone, and the total harmonic distortion （THD） is greatly reduced. The weights of filter are adjusted on-line according to the control error by using least-mean-square （LMS） algorithm. Simulation results performed with a hydraulic system demonstrate the efficiency and validity of the proposed adaptive feed-forward compensator （AFC） control scheme

关键词： Adaptive filter Adaptive feed-forward compensator Least-mean-square algorithm Dead zone Harmonic distortion

Regulating the self-assembly of rigid 2D ribbon-like amphiphilic homopolymer via tailoring its holistic conformation

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Science China Chemistry 2023年第8期66卷 2339-2346页

作者： Yumeng Gao Weisheng Feng Yao Sun Yuan Yao liquan wang Shaoliang Lin Shanghai Key Laboratory of Advanced Polymeric Materials Frontiers Science Center for Materiobiology and Dynamic Chemistry of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China

Amphiphilic rigid backbone polymers are traditionally seemed as one-dimensional(1D)rods and show distinct self-assembly behavior to flexible polymers,but they could hardly adapt morphology-tunable self-assembly by changing their holistic conformation upon external *** this study,we synthesized a series of amphiphilic homopolymers poly(acetylene azobenzene oligoethylene glycol)(P(AAzo-EGx))containing conjugated polyacetylene mainchain,azobenzene pendants and oligo ethylene glycol tails in each *** comb-like amphiphilic polymer could be treated as two-dimensional(2D)nanoribbons with tunable holistic conformation via meticulous tailoring intrastrand repulsion and interchainπ-πinteraction of azobenzene pendants by light,temperature,and solvent swelling.P(AAzo-EG_(2))could self-assemble into large vesicles in ambient,whereas transformed to supramolecular helix bundles(SHBs)at 65℃as well as depicted by dissipative particle dynamics(DPD)simulation,and then turned into grass leaf-like micelles upon sequential ultraviolet(UV)and blue light *** three assemblies featured different stacking mode of PAAzo skeletons although showed similar aggregate induce emission(AIE)*** this holistic macromolecular chain conformation-induced self-assembly and morphology transformation,temperature influenced the stacking of hydrophobic parts mainly by tuning the torsion of PAAzo *** amount of good solvent played a vital role by swelling of hydrophobic PAAzo skeleton,and helping the movement and rearrangement of azobenzene pendants and polyacetylene mainchains like a *** length and diameter of SHBs could be tuned by changing *** work uncovered a facile strategy to tailor the self-assembly of rigid backbone polymers for fabrication of functional nanodevices.

关键词： self-assembly tunable conformation rigid skeleton two-dimensional nanoribbon stimuli response

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Chronology and Geochemistry of the Nadingcuo Volcanic Rocks in the Southern Qiangtang Region of the Tibetan Plateau:Partial Melting of Remnant Ocean Crust along the Bangong-Nujiang Suture

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Acta Geologica Sinica(English Edition) 2010年第6期84卷 1461-1473页

作者： wang Baodi CHEN Jianlin XU Jifeng wang liquan ZENG Qinggao DONG Yanhui Chengdu Institute of Geology and Mineral Resources Chengdu 610081 China Key Laboratory of Geochronology and Geochemistry Guanzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Regional Geological Surveying Party of the Tibet Bureau of Geology and Exploration Lhasa 851400 China The Second Institute ofOceangraphy SOA Hangzhou 310012 China

The Nadingcuo high-K calc-alkaline rocks mainly composed of trachyte and trachyandesite are the largest outcrop area of volcanic rocks in southern Qiangtang terrane in the Tibetan plateau. However,their exact source and peterogenesis are still debated.^（40）Ar-^（39）Ar and LAM-ICPMS zircon U-Pb isotopic dating confirm that these rocks erupted in *** addition,the Nadingcuo volcanic rocks are characterized by high Sr/Y content ratios,similar with the adakite derived from partial melting of oceanic *** can be further classified as high Mg~#（Mg~#=48-57） and low Mg~# （Mg~#=33-42） *** Nadingcuo adakitic rocks have relatively low（^（87）Sr/^（86）Sr）_i and highε_（Nd）（t）, showing a trend of similarity to the Dongcuo ophiolite present in the Bangong-Nujiang oceanic crust. Simple modeling indicates that the Nadingcuo adakitic rocks are a mix resulting from the basalt of Bangong-Nujiang Ocean with 10%-20%crustal material of Lhasa *** these bases we suggest that the low Mg~# Nadingcuo adakitic rocks are the product of partial melting of remnant oceanic crust with small sediment,and the high Mg~# rocks are the result of reaction between rising melt of remnant oceanic crust with subducted sediment and mantle ***,the origin of Nadingcuo adakitic rocks may be related to intracontinental subduction triggered by collision of India-Asia during Cenozoic.

关键词： intracontinental subduction adakitic rocks remnant oceanic crust Nadingcuo Qiangtang Tibetan plateau

Ages and tectonic significance of the collision-related granite porphyries in the Lhunzhub Basin, Tibet, China

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Chinese Science Bulletin 2007年第12期52卷 1669-1679页

作者： wang liquan ZHU DiCheng GENG QuanRu LIAO ZhongLi PAN GuiTang Chengdu Institute of Geology and Mineral Resources Chengdu 610082 China

The Paleocene collision-related granite porphyries are identified for the first time along the western margin of the Lhunzhub Basin, Tibet. SHRIMP U-Pb zircon analysis indicates that the granite porphyries were emplaced at 58.7±1.1 Ma (MSWD = 0.79) during the Indo-Asian continental collision. The granite porphyries are peraluminous and high in K, belonging to the calc-alkaline to high-K calc-alkaline series. They are relatively enriched in LILE, Th and LREE and depletion in Ba, Nb, P and Ti, characterized by LREE-enriched patterns with slightly to moderately negative Eu anomalies. These Paleocene granite porphyries are interpreted as the products generated by partial melting of the pre-existing arc crustal rocks caused by the increase of pressures and temperatures during the crustal shortening at the early stages of the Indo-Asian continental collision since 65 Ma. Despite inherited geochemical features and tectonic settings of the arc protoliths, they are significantly different from the volcanic rocks of the Dianzhong Formation within the Linzizong Group and the Miocene granite por- phyries in the Gangdise belt.

关键词：中国西藏林周盆地古新世花岗石斑岩 U-Pb锆石测年

Geochemistry and Petrogenesis of Volcanic Rocks in the Yeba Formation on the Gangdise Magmatic Arc, Tibet

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Journal of China University of Geosciences 2005年第4期16卷 283-296页

作者： Geng Quanru Pan Guitang Jin Zhenmin wang liquan Liao Zhongli Faculty of Earth Sciences China University of Geosciences Wuhan 430074 China Chengdu Institute of Geology and Mineral Resources Chengdu 610082 China

The Early Jurassic bimodal volcanic rocks in the Yeba Formation, situated between Lhasa, Dagze and Maizhokunggar, composed of metabasalt, basaltic ignimbrite, dacite, silicic tuff and volcanic breccia, are an important volcanic suite for the study of the tectonic evolution of the Gangdise magmatic arc and the Mesozoic Tethys. Based on systematic field investigations, we carried out geochemical studies on representative rock samples. Major and trace element compositions were analyzed for these rock samples by XRF and ICP-MS respectively, and an isotope analysis of Rb-Sr and Sm-Nd was carried out by a MAT 262 mass spectrograph. The results show that the SiO2 contents in lava rocks are 41 %-50.4% and 64 % -69 %, belonging to calc-alkaline basalt and dacite. One notable feature of the basalt is its low TiO2 content, 0.66%-1.01%, much lower than those of continental tholeiite. The ∑REE contents of basalt and dacite are 60.3-135 μg/g and 126, 4--167.9μg/ g respectively. Both rocks have similar REE and other trace element characteristics, with enriched LREE and LILE relative to HREE and HFS, similar REE patterns without Eu anomaly. The basalts have depleted Ti, Ta and Nb and slightly negative Nb and Ta anomalies, with Nb = 0.54--1.17 averaging 0. 84. The dacites have depleted P and Ti and also slightly negative Nb and Ta anomalies, with Nb= 0. 74 -1. 06 averaging 0. 86. Major and trace elemental and isotopic studies suggest that both basalt and dacite originated from the partial melting of the mantle wedge at different degrees above the subduction zone. The spinal Iherzolite in the upper mantle is likely to be their source rocks, which might have been affected by the selective metasomatism of fluids with crustal geochemistry. The LILE contents of both rocks were affected by metamorphism at later stages. The Yeba bimodal volcanic rocks formed in a temporal extensional situation in a mature island arc resulting from the Indosinian Gangdise magmatic arc.

关键词： bimodal volcanic rock geochemistry petrogenesis Gangdise magmatic arc late Indosinian to early Yanshannian.

Therapeutic applications of exosomes from adipose-derived stem cells in antifibrosis

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Chinese Journal of Plastic and Reconstructive Surgery 2021年第3期3卷 161-166页

作者： liquan wang Zhujun Li Yunzhu Li Jiuzuo Huang Nanze Yu Xiao Long Department of Plastic and Reconstructive Surgery State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College Hospital of Peking Union Medical College and Chinese Academy of Medical SciencesBeijing 100730China

Fibrosis is a condition in which connective tissue replaces normal parenchymal tissue,resulting in significant tissue *** can affect several organs and pose a serious threat to human health and *** stem cells(ASCs)have been suggested as promising candidates for antifibrotic *** secretion is one of the key processes in stem cell therapy due to its critical function in cellular ***-derived exosomes(ASC-exos)are used as tools for restoring and regenerating damaged tissue,and they are now thought to orchestrate antifibrosis-related *** this review,we summarize the recent findings and present an extensive view of the therapeutic applications of ASC-exos in fibrotic diseases.

关键词： Mesenchymal stem cell Adipose-derived stem cell Exosome Fibrosis Animal experiment Therapeutic application

An Intelligent Manufacturing Platform of Polymers:Polymeric Material Genome Engineering

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Engineering 2023年第8期27卷 31-36页

作者： Liang Gao liquan wang Jiaping Lin Lei Du Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Polymeric materials with excellent performance are the foundation for developing high-level technology and advanced *** material genome engineering(PMGE)is becoming a vital platform for the intelligent manufacturing of polymeric ***,the development of PMGE is still in its infancy,and many issues remain to be *** this perspective,we elaborate on the PMGE concepts,summarize the state-of-the-art research and achievements,and highlight the challenges and prospects in this *** particular,we focus on property estimation approaches,including property proxy prediction and machine learning prediction of polymer *** potential engineering applications of PMGE are discussed,including the fields of advanced composites,polymeric materials for communications,and integrated circuits.

关键词： Polymeric materials Materials genome approach Machine learning Property prediction Rational design

Zircon SHRIMP geochronology and Nd-Pb isotopic characteristics of the meta-basalt in the central part of Tibetan Plateau's Qiangtang region

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Science China Earth Sciences 2014年第5期57卷 428-438页

作者： PENG ZhiMin GENG QuanRu PAN GuiTang wang liquan ZHANG Zhang CONG Feng GUAN JunLei Chengdu Institute of Geology & Mineral Resources China Geological Survey

A small-sized meta-basic rock system is discovered in Qilongwuru Gully of Central Qiangtang’s Shuanghu region and contains a meta-basalt and garnet-bearing plagioclase *** zircon U/Pb age of this meta-basalt by SHRIMP analysis is463.3±4.7 Ma,suggesting that this lava formed in the Middle Ordovician,and is consistent with that of the meta-basic rocks in the Taoxing Lake and Guoganjianian Mountain ophiolite found in the Qiangtang *** this lava system bears similar geochemistry to N-MORB,it might be a component of ophiolite that represents the trail of the extinction of the Proto-Tethys,suggesting that the formation of Proto-Tethys oceanic basin in the Longmu Co-Shuanghu suture zone could date as far back as to the Middle *** geochemical analysis indicates that the magma source area consists of both depleted mantle(DM)and enriched mantle(EMII)end members and bears Dupal anomaly,similar to that of the Paleo-Tethys in the Neo-Tethys represented by the Yarlung-Tsangpo suture zone,the Paleo-Tethys represented by the Changning-Menglian suture zone,and the Paleo-Tethys in Sanjiang *** suggests that they have inherited the attribute of the Proto-Tethys mantle domain,and the Longmu Co-Shuanghu suture zone may be a representative of the northern boundary of Gondwana.

关键词： Tibetan Plateau's Qiangtang region meta-basalt zircon U-Pb age Tethys Nd-Pb isotope

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