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Early Cretaceous Palynological Assemblages of the Shuangliao Fault Depression, Songliao Basin and their Geological Implications

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 1949-1963页

作者： wang chenglong ZHANG Meisheng LI Xiaobo wang Yini College of Earth Sciences Jilin University

The pollen and spores found in the Early Cretaceous strata of two cores from the Shuangliao Fault Depression were studied systematically, and two palynological assemblages have been recognized. Assemblage I from the Yingcheng Formation is named Paleoconiferus-Pinuspollenites; the assemblage is characterized by an extremely high content of Paleoconifer pollen. Assemblage II from Member 1 of the Denglouku Formation is named Cicatricosisporites-Cyathidites-Pinuspollenites; the assemblage is characterized by the abundant presence of Laevigati spores, but less Paleoconifer pollen. According to the palynological data and zircon U-Pb dating, the geological age of the Yingcheng Formation is thought to be Aptian-Albian, and that of the Denglouku Formation is thought to be Early Albian. On the basis of the composition of each assemblage, we can infer that during the depositional period of the Yingcheng Formation, the paleovegetation was mainly conifer forest, the paleoclimate was consistent with the temperate climate of today, and the paleoenvironment was humid feature. During the depositional period of Member 1 of the Denglouku Formation, the paleovegetation was mainly conifer forest and shrubs, the paleoclimate was consistent with the subtropical climate of today, and the paleoenvironment was humid. The results significantly improve our understanding of the stratigraphy in the Shuangliao Fault Depression, provide biostratigraphic evidence for the division and correlation of Early Cretaceous strata in the Shuangliao Fault Depression, and provide new data for analyzing paleovegetation and paleoclimate in the Songliao Basin.

关键词： palynologieal assemblages Yingcheng Formation Denglouku Formation Shuangliao Fault Depression Songliao Basin

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Double random number encryption blind watermarking technique based on DWT-DCT domain

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Optoelectronics Letters 2024年第10期20卷 614-622页

作者： wang chenglong MA Yi wang Xia National Engineering Research Center for Technology and Equipment of Environmental Deposition Lanzhou Jiaotong UniversityLanzhou730070China Key Laboratory of Opto-Technology and Intelligent Control Ministry of Education Lanzhou Jiaotong UniversityLanzhou730070China

Blind watermarking plays a significant role in copyright protection and information *** enhance the security of watermark image information,a dual encryption method is proposed,which combines block shuffling with Logistic chaos encryption using two sets of random numbers as *** dual encryption technique is applied to blind watermark images,utilizing a combination of discrete wavelet transform(DWT)and discrete cosine transform(DCT)as the embedding ***,the watermark image is divided into small blocks,which are shuffled and rearranged using one set of random numbers as the key,while recording the shuffling sequence of block ***,the shuffled blocks are reassembled into an image,and another set of random numbers is used as the key for Logistic chaos encryption,rendering the watermark image chaotically ***,a double DWT is applied to the carrier image,followed by a DCT,allowing the encrypted watermark image to be *** achieves the concealment of the blind *** results demonstrate that this method exhibits robustness,excellent invisibility,and secrecy.

关键词： random image DCT

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A New Palynological Assemblage from the Nenjiang Formation of Dayangshu Basin, and its Geological Implication

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Acta Geologica Sinica(English Edition) 2020年第1期94卷 198-199页

作者： SUN Lei wang chenglong BIAN Xiongfei Shenyang Center of Geological Survey China Geological SurveyShenyang 110034LiaoningChina School of Earth Sciences Northeast Petroleum UniversityDaqing 163318HeilongjiangChina

Objective The Dayangshu Basin located in eastern Inner Mongolia,is one of the key areas for oil and gas exploration in the periphery of Songliao *** far,this basin has been poorly explored,and the basic geological research is still weak,due to the lack of high-quality paleontologic and stratigraphic *** previous oil and gas investigations were mainly focused on the Early Cretaceous ***,the Late Cretaceous Nenjiang Formation in the basin also has hydrocarbon potential according to the latest *** recent oil and gas geological survey,palynological fossils have been discovered from the Nenjiang Formation in the Dayangshu Basin,providing new evidence for biostratigraphic division and correlation.

关键词： and its Geological Implication A New Palynological Assemblage from the Nenjiang Formation of Dayangshu Basin

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Synthesis of N-doped carbon quantumn dots as lubricant additive to enhance the tribological behavioor f MoS_(2)nanofluid

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Friction 2023年第3期11卷 441-459页

作者： Jiaqi HE Jianlin SUN Junho CHOI chenglong wang Daoxin SU School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Department of Mechanical Engineering The University of TokyoTokyo 113-8656Japan

In this study,a novel lubricant additive nitrogen-doped carbon quantum dot(N-CQD)nanoparticle was prepared by the solvothermal *** synthesized spherical N-CQD nanoparticles in the diameter of about 10 nm had a graphene oxide(GO)-like structure with various oxygen(O)-and nitrogen(N)-containing functional *** N-CQDs were added to MoS_(2)nanofluid,and the tribological properties for steel/steel friction pairs were evaluated using a pin-on-disk ***-equilibrium molecular dynamics(NEMD)simulations for the friction system with MoS_(2)or MoS_(2)+N-CQD nanoparticles were also *** results showed that friction processes with MoS_(2)+N-CQD nanofluids were under the mixed lubrication *** MoS_(2)nanofluid containing 0.4 wt%N-CQDs could achieve 30.4%and 31.0%reduction in the friction coefficient and wear rate,respectively,compared to those without *** analyzing the worn surface topography and chemical compositions,the excellent lubrication performance resulted from the formation of tribochemistry-induced *** average thickness of tribofilm was about 13.9 nm,and it was composed of amorphous substances,ultrafine crystalline nanoparticles,and self-lubricating FeSO_(4)/Fe2(SO_(4))_(3).NEMD simulation results indicated the interaction between S atoms in MoS_(2)as well as these O-and N-containing functional groups in N-CQDs with steel surfaces enhanced the stability and strength of *** the metal surface was further protected from friction and wear.

关键词： carbon-based quantum dots(CQDs) lubricant nanofluid molecular dynamics(MD) tribofilm

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Zircon U-Pb Age of the Lamenzi Formation Volcanic Rocks in the Liuhe Basin of Southern Jilin Province, China

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1283-1284页

作者： LIU Xuesong wang chenglong ZHANG Meisheng College of Earth Sciences Jilin University Museum of Geology Jilin University

Objective A large number of Mesozoic volcano-sedimentary basins is distributed in southern Jilin Province,China,and filled with a great set of coal-bearing *** to the petroleum resources evaluation by previous researc... 详细信息

关键词： Zircon U-Pb Age of the Lamenzi Formation Volcanic Rocks the Liuhe Basin of Southern Jilin Province

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New Discovery of Palynological Assemblage for the Shahezi Formation from Type Locality, Southeastern Songliao Basin

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Acta Geologica Sinica(English Edition) 2018年第1期92卷 396-397页

作者： wang chenglong ZHANG Meisheng LIU Xuesong SUN Kai College of Earth Sciences Jilin University Museum of Geology Jilin University Exploration and Development Research Institute of Jilin Oilfield Company

Objective The Shahezi Formation is the main source rock stratum during the faulting stage of the Songliao Basin,and could not be distinguished from the coal-bearing clastic member of the Yingcheng Formation in *** petroleum geologists have done a lot of research on palynostratigraphy in drill cores inside the Songliao *** understanding of the palynological assemblage

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Far-field super-resolution ghost imaging with a deep neural network constraint

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Light(Science & Applications) 2022年第1期11卷 27-37页

作者： Fei wang chenglong wang Mingliang Chen Wenlin Gong Yu Zhang Shensheng Han Guohai Situ Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China CAS Center for Excellence in Ultra-intense Laser Science Shanghai 201800China

Ghost imaging(GI)facilitates image acquisition under low-light conditions by single-pixel measurements and thus has great potential in applications in various fields ranging from biomedical imaging to remote ***,GI usually requires a large amount of single-pixel samplings in order to reconstruct a high-resolution image,imposing a practical limit for its *** we propose a far-field super-resolution GI technique that incorporates the physical model for GI image formation into a deep neural *** resulting hybrid neural network does not need to pre-train on any dataset,and allows the reconstruction of a far-field image with the resolution beyond the diffraction ***,the physical model imposes a constraint to the network output,making it effectively *** experimentally demonstrate the proposed GI technique by imaging a flying drone,and show that it outperforms some other widespread GI techniques in terms of both spatial resolution and sampling *** believe that this study provides a new framework for GI,and paves a way for its practical applications.

关键词： neural ghost Ghost

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Nickel-Catalyzed Regiodivergent Acylzincation of Styrenes with Organozincs and CO

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Chinese Journal of Chemistry 2024年第6期42卷 599-604页

作者： chenglong wang Ning Liu Xianqing Wu Jingping Qu Yifeng Chen Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237 China Dedicated to the Special Issue of C1 Chemistry.

Transition metal-catalyzed carbometallation of unsaturated hydrocarbons constitutes one of the most efficient synthetic methodologies for the construction of C—C ***,the incorporation of organometallic reagent with the CO gas as a nucleophilic acyl synthon could enable the acylmetallation reaction,which greatly increases the horizon of carbometallation ***,we report a nickel-catalyzed regiodivergent acylzincation of o-cyano cinnamate ester and o-cyano styrene,in which the cyano moiety intramolecularly captures zinc intermediates to trigger the tandem cyclization *** protocol features mild conditions,broad substrate scope and excellent functional group tolerance,thus affording a diverse array of highly functionalized carbocyclic compounds.

关键词： Carbonylation Carbometallation Styrene Nickel Cyclization

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Excess and Radiogenic Argon in High-Pressure Mylonites of the Tan-Lu Fault Zone, Eastern China

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 84-98页

作者： XIE chenglong ZHU Guang wang Yongshen HU Zhaoqi School of Resource and Environment Engineering Hefei University of Technology Hefei Anhui 230009

Bulk separates of porphyroclastic phengite, neoformed phengite and their mixtures from the Tan-Lu HP mylonites overprinted on the Sulu UHP rocks were analyzed with the 40Ar/39Ar step heating method. Two samples of the neoformed phengite from ultramylonite give 40Ar/39Ar plateau ages of 209.9±1.8 Ma and 214.3±1.8 Ma, which are interpreted as representing cooling times of the TanLu sinistral faulting, and provide geochronological evidence for the syn-orogenic faulting of the Tan-Lu fault zone. The results show that the phengite formed during the retrograde eclogite-facies mylonitization was not contaminated with excess argon and can be used for dating the deformation. Argon closure in previous K-bearing minerals with excess argon under a retrograde HP dry condition is considered to be the reason for lack of excess argon incorporation in the neoformed phengite. Five porphyroclastic phengite samples yield 40Ar/39Ar plateau ages ranging from 666±12 Ma to 307.1±3.3 Ma, which are interpreted as being contaminated with excess argon. Two mixture samples with plateau ages of 239.4±2.1 Ma and 239.3±2.0 Ma show upward-convex age spectra caused by the mixture of older porphyroclastic phengite with excess argon incorporation and younger neoformed phengite without excess argon incorporation. It is demonstrated that excess argon introduced from the previous UHP metamorphism is still preserved in the pre-existing phengite after the Tan-Lu eclogite-facies mylonitization. The intense deformation under HT and HP conditions cannot erase excess argon in the previous phengite totally due to restricted fluid activities. These porphyroclastic phengite previously contaminated with excess argon cannot be used for dating the later HP deformation. This indicates that deformation under a HP dry condition does not play an important role in removing previous 40Are in phengite.

关键词： excess argon phengite mylonite Tan-Lu fault zone 40Ar/39Ar dating

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Comparative study on the inhibiting mechanism of inhibitor with primary amine groups and quaternary ammonium groups for sodium bentonite

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Petroleum 2023年第4期9卷 526-533页

作者： Gang Xie Yujing Luo chenglong wang Mingyi Deng Yang Bai State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China CNOOC Ltd. Zhanjiang524057China

Shale hydration and swelling is the main obstacle to the development of shale gas utilizing water-based drilling fluids(WBDFs).In this work,the inhibition mechanism of alkylammonium inhibitor and alkylamine inhibitor adsorbed on sodium bentonite(Na+Bent)are investigated using infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),X-ray diffraction(XRD),zeta potential,particle size distribution tests,and thermogravimetry analysis(TGA).The results suggest that HTB and HMD can be inserted into the interlamination of Na+Bent and minimize the basal spacing compared to hydrated Na+*** and HMD are inserted between the Na+Bent layers in a single-layer tiled manner and replace the sodium ions that are firmly fixed between the ***,water molecules are removed from the interlayer Na+*** interaction between the quaternary ammonium group and Na+Bent is more significant than between the primary amine group and Na+*** inhibition performance suggests that HTB inhibits Na+Bent hydration and swelling more substantially than other inhibitors,indicating that the inhibition performance of the two quaternary ammonium groups is greater than that of the two primary amine ***,HTB can be used as intercalation inhibition in WBDFs and has tremendous application value.

关键词： Sodium bentonite Alkylammonium Alkylamine Inhibition performance

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