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Late Cenozoic uplift of the Liupan Mountains:Evidence from the Neogene loess deposits

Science China Earth Sciences 2024年第5期67卷 1480-1488页

作者： Zhilin he Yansong QIAO Zhengtang GUO Chaoqin CheN Long CheN Yang FU Ye YANG Yanxia liang Xinru LIN Guoqiao XIAO Tao ZHAN Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China University of Chinese Academy of Sciences Beijing 100049China Institute of Ecological Geology Survey and Research of heilongjiang Province Harbin 150030China School of Geography and Information Engineering China University of GeosciencesWuhan 430078China School of Earth Sciences China University of GeosciencesWuhan 430074China Natural Resources Survey Institute of heilongjiang Province Harbin 150036China

The Liupan Mountains,one of the important mountain ranges in western China,are located on the boundary between the northeastern Tibetan Plateau and the Ordos *** uplift history of the Liupan Mountains remains *** deposits are good tracers of regional tectonic and geomorphic changes,because loess is sensitive to erosion and the formation and preservation of loess requires relatively flat highlands and relatively stable tectonic *** investigated the distribution of Neogene loess deposits on the western piedmont of the Liupan Mountains and examined a near-continuous loess section(Nanping section)on the piedmont alluvial *** of magnetic susceptibility stratigraphy with the QA-ⅠMiocene loess sequence dates this 56-m section covering the interval from~8.1 to 6.2 *** lower boundary age of this section,together with previously reported Zhuanglang red clay(sand-gravel layers with intercalated loess during~9–8 Ma and near-continuous loess during~8–4.8 Ma)and Chaona red clay(~8.1–2.58 Ma),indicates that the Liupan Mountains were uplifted in the late Miocene(~9–8 Ma)and basically formed by~8 Ma,attesting to no intense mountain building since that *** addition,based on the information from the Zhuanglang core and the QA-Ⅰsection,we infer that sizable parts of the Liupan Mountains were uplifted during the late Oligocene–early Miocene and did not experience intense uplift during~22–9 Ma.

关键词： Liupan Mountains Mountain building Neogene Loess Chinese Loess Plateau Late Miocene Late Oligocene–early Miocene

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Preparation of MXene-based hybrids and their application in neuromorphic devices

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International Journal of Extreme Manufacturing 2024年第2期6卷 164-188页

作者： Zhuohao Xiao Xiaodong Xiao Ling Bing Kong Hongbo Dong Xiuying Li Bin he Shuangchen Ruan Jianpang Zhai Kun Zhou Qin Huang liang Chu School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen 333403JiangxiPeople’s Republic of China School of Mechanical and Vehicle Engineering Linyi UniversityLinyi 276000ShandongPeople’s Republic of China College of New Materials and New Energies Shenzhen Technology UniversityShenzhen 518118GuangdongPeople’s Republic of China School of Mechanical&Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore Ningbo Institute of Materials Engineering and Technology Chinese Academy of ScienceNingbo 315201ZhejiangPeople’s Republic of China Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018ZhejiangPeople’s Republic of China

The traditional von Neumann computing architecture has relatively-low information processing speed and high power consumption,making it difficult to meet the computing needs of artificial intelligence(AI).Neuromorphic computing systems,with massively parallel computing capability and low power consumption,have been considered as an ideal option for data storage and AI computing in the ***,as the fourth basic electronic component besides resistance,capacitance and inductance,is one of the most competitive candidates for neuromorphic computing systems benefiting from the simple structure,continuously adjustable conductivity state,ultra-low power consumption,high switching speed and compatibility with existing CMOS *** memristors with applying MXene-based hybrids have attracted significant attention in recent ***,we introduce the latest progress in the synthesis of MXene-based hybrids and summarize their potential applications in memristor devices and neuromorphological *** explore the development trend of memristors constructed by combining MXenes with other functional materials and emphatically discuss the potential mechanism of MXenes-based memristor ***,the future prospects and directions of MXene-based memristors are briefly described.

关键词： MXene etching fabrication memristor neuromorphic

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Antibacterial and antioxidant bifunctional hydrogel based on hyaluronic acid complex MoS_(2)-dithiothreitol nanozyme for treatment of infected wounds

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Regenerative Biomaterials 2024年第4期3卷 98-110页

作者： Yongping Lu Weiqi Kang Yue Yu Ling liang Jinrong Li Haiying Lu Ping Shi Mingfang he Yuemin Wang Jianshu Li Xingyu Chen Guangyuan Central Hospital Guangyuan 628000P.R.China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065P.R.China Institute of Biomedical Engineering College of MedicineSouthwest Jiaotong UniversityChengdu 610031P.R.China

Wound repair is a complex physiological process that often leads to bacterial infections,which significantly threaten human ***,developing wound-healing materials that promote healing and prevent bacterial infections is *** this study,the coordination interaction between sulfhydryl groups on dithiothreitol(DTT)and MoS_(2)nanosheets is investigated to synthesize a MoS_(2)-DTT nanozyme with photothermal properties and an improved free-radical scavenging ***-bond-modified hyaluronic acid is used as a monomer and is cross-linked with a PF127-DA *** is prepared in coordination with MoS_(2)-DTT as the functional *** hydrogel exhibits antioxidant and antibacterial properties,attributed to the catalytic activity of catalase-like enzymes and photothermal *** the near-infrared(NIR),it exhibits potent antibacterial effects against gram-positive(Staphylococcus aureus)and gram-negative bacteria(Escherichia coli),achieving bactericidal rates of 99.76%and 99.42%,***,the hydrogel exhibits remarkable reactive oxygen species scavenging and antioxidant capabilities,effectively countering oxidative stress in L929 ***,in an animal model,wounds treated with the PHMoD(2.0)and NIR laser heal the fastest,sealing completely within 10 *** results indicate the unique biocompatibility and bifunctionality of the PHMoD,which make it a promising material for wound-healing applications.

关键词： hydrogel wound repair antibacterial antioxidant nanozyme photothermal therapy

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Regulating Actuations and Shapes of Liquid Crystal Elastomers through Combining Dynamic Covalent Bonds with Cooling-Rate-Mediated Control

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Chinese Journal of Polymer Science 2024年第10期42卷 1442-1448,I0008页

作者： Ya-Wen Liu Huan liang Hong-Tu Xu En-Jian he Zhi-Jun Yang Yi-Xuan Wang Yen Wei Zhen Li Yan Ji The Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing100084China Advanced Materials and Energy Center Academy of Aerospace Science and InnovationBeijing100088China

Realizing multiple locked shapes in pre-oriented liquid crystal elastomers(LCEs)is highly desired for diversifying deformations and enhancing ***,conventional LCEs only deform between two shapes for each actuation cycle upon liquid crystal-isotropic phase transitions induced by external ***,we propose to regulate the actuation modes and the locked shapes of a pre-orientated epoxy LCE by combining dynamic covalent bonds with cooling-rate-mediated *** actuation modes can be adjusted on demand by exchange reactions of dynamic covalent *** from the established actuation modes,such as elongation,bending,and spiraling,the epoxy LCE displays varied locked shapes at room temperature under different cooling *** mediums are utilized to control the cooling rate,including water,silicone oil,and copper *** approach provides a novel way for regulating the actuation modes and locked shapes of cuttingedge intelligent devices.

关键词： Liquid crystal elastomer Epoxy Dynamic covalent bond Vitrimer Cooling rate

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High speed laser cladding as a new approach to prepare ultra-high temperature ceramic coatings

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Journal of Advanced Ceramics 2024年第2期13卷 143-154页

作者： Qiyao Deng Pengfei he Chuan Sun Yang Li Yue Xing Yujie Wang Jinglong Li Xiubing liang Xin Wang Yujie Zhou Yujun Cai National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould Tianjin University of Technology and EducationTianjin 300222China Defense Innovation Institute Academy of Military ScienceBeijing 100071China School of mechanical engineering Tianjin University of Technology and EducationTianjin 300222China Scientific and Technological Innovation Center Beijing 100012China

Ultra-high temperature ceramic(UHTC)coatings are used to protect the hot-end components of hypervelocity aerocrafts from thermal *** study provides a new approach to fabricate UHTC coatings with high speed laser cladding(HSLC)technology,and places more emphasis on investigating the formation mechanism,phase compositions,and mechanical properties of HSLC-UHTC *** show that a well-bonded interface between the coating and the tantalum alloy substrate can be *** coating is mainly composed of(Zr,Ta)C ceramic solid solution phase with a content of higher than 90% by volume and Ta(W)metal solid solution *** a relatively high powder feeding rate,the ZrC ceramic phase appears in the coating while a dense ZrC UHTC top layer with a thickness of up to~50μm is successfully *** for the mechanical properties of the HSLC coatings,the fracture toughness of the coating decreases with the increase of powder feeding *** increase of carbide solid solution phase can significantly improve the high temperature microhardness(552.7±1.8 HV0.5@1000℃).The innovative design of HSLC ZrC-based coatings on refractory alloys accomplishes continuous transitions on microstructure and properties from the substrate to the UHTC top layer,which is a very promising candidate scheme for thermal protection coating.

关键词： high speed laser cladding(HSLC) ultra-high temperature ceramic(UHTC) thermal protection coating microstructure mechanical properties

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The blood lactate/serum albumin ratio might represent a good prognostic indicator of 28-day mortality in patients with acute respiratory distress syndrome:a retrospective observational study

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Emergency and Critical Care Medicine 2024年第2期4卷 52-59页

作者： Jiahao Chen chang Gao Ling Yang Lijuan Yang Ying he Shiqi Guo Yuanxiao Sun Siyu he Qiang Guo Department of Critical Care Medicine The First Affiliated Hospital of Soochow UniversitySuzhouJiangsuChina Department of Emergency and Critical Care Medicine Dushu Lake Hospital Affiliated to Soochow University(Suzhou Dushu Lake Hospital)SuzhouJiangsuChina

Background:Acute respiratory distress syndrome(ARDS)is an acute inflammatory lung injury with a high mortality ***,previous ARDS prognostic scoring systems or predictors have been limited by complex formulas that are relatively expensive and inconvenient to ***,this study aimed to explore the clinical significance of the blood lactate/serum albumin ratio(LAR)in assessing the prognosis of ARDS patients and compare it with other indicators related to 28-day mortality in ARDS ***:We conducted a single-center retrospective study involving patients who fulfilled the Berlin definition of ARDS between 2016 and *** data were collected from medical records within 24 hours after ARDS *** LAR,neutrophil-to-lymphocyte ratio,and monocyteto-lymphocyte ratio(MLR)were *** primary clinical outcome was 28-day *** risk factors for 28-day mortality were determined using conditional logistic regression *** receiver operating characteristic curve was used to evaluate the area under the curve(AUC).Results:A total of 276 ARDS patients met the inclusion criteria and were divided into surviving and nonsurviving groups according to 28-day *** were significant differences in the Acute Physiologic Assessment and Chronic health Evaluation II scores,Sequential Organ Failure Assessment scores,MLRs,and LARs between the surviving and nonsurviving *** AUC for the LAR was 0.790(Phereas the AUCs for the Acute Physiologic Assessment and Chronic health Evaluation II score,Sequential Organ Failure Assessment score,neutrophil-to-lymphocyte ratio,and MLR were 0.584,0.599,0.524,and 0.587,*** grouping according to an LAR optimal cutoff value of 0.07,28-day mortality was significantly higher in the high-LAR group than in the low-LAR group(47.18 vs.12.69,Phe LAR is an independent risk factor for 28-day mortality in ARDS patients and can be used to assess the severity of

关键词： Acute respiratory distress syndrome Albumin Lactate Mortality Predictor

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Prognostic significance of grade of malignancy based on histopathological differentiation and Ki-67 in pancreatic ductal adenocarcinoma

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Cancer Biology & Medicine 2024年第5期21卷 416-432页

作者： Yuexiang liang Guannan Sheng Yu Guo Yiping Zou Hanhan Guo Zhifei Li Shaofei chang Quan Man Song Gao Jihui Hao Department of Pancreatic Cancer Tianjin Medical University Cancer Institute&HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China Department of Gastrointestinal Oncology The First Affiliated Hospital of Hainan Medical UniversityHaikou 570102China Department of Gastrointestinal Pancreatic Surgery Shanxi Provincial People’s HospitalTaiyuan 030012China

Objective:Tumor cell malignancy is indicated by histopathological differentiation and cell ***-67,an indicator of cellular proliferation,has been used for tumor grading and classification in breast cancer and neuroendocrine ***,its prognostic significance in pancreatic ductal adenocarcinoma(PDAC)remains ***:Patients who underwent radical pancreatectomy for PDAC were retrospectively enrolled,and relevant prognostic factors were *** of malignancy(GOM),a novel index based on histopathological differentiation and Ki-67,is proposed,and its clinical significance was ***:The optimal threshold for Ki-67 was determined to be 30%.Patients with a Ki-67 expression level>30%rather than≤30%had significantly shorter 5-year overall survival(OS)and recurrence-free survival(RFS).In multivariate analysis,both histopathological differentiation and Ki-67 were identified as independent prognostic factors for OS and *** GOM was used to independently stratify OS and RFS into 3 tiers,regardless of TNM stage and other established prognostic *** tumor-nodemetastasis-GOM stage was used to stratify survival into 5 distinct tiers,and surpassed the predictive performance of TNM stage for OS and ***:Ki-67 is a valuable prognostic indicator for *** of the GOM in the TNM staging system may potentially enhance prognostic accuracy for PDAC.

关键词： Pancreatic ductal adenocarcinoma prognosis Ki-67 differentiation TNM stage

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New material of Coniopteris simplex from the Middle Jurassic of the Ordos Basin,Inner Mongolia,China and implications on its spatio-temporal distribution and paleogeography

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Journal of Palaeogeography 2024年第2期13卷 199-211页

作者： Yun-Feng Li chang-Lu Zhang Fei liang Xiao Tan Fan-Hao Gong Chun-Lin Sun Tao Li Yu-Ling Na Research Center of Paleontology and Stratigraphy Jilin UniversityChangchun 130026Jilin ProvinceChina College of Earth Sciences Jilin UniversityChangchun 130061Jilin ProvinceChina College of Paleontology Shenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Key Lab of Evolution of Past Life in NE Asia Ministry of Natural ResourcesShenyang Normal UniversityShenyang 110034Liaoning ProvinceChina Shenyang Center of Geological Survey China Geological SurveyShenyang 110034Liaoning ProvinceChina

Coniopteris simplex is a common component in many Jurassic ***,due to morphological variations in sterile fronds and incomplete preservation of reproductive organs,its classification has been controversial for a long ***,we present new material collected from the Middle Jurassic Yan’an Formation in the Ordos Basin,Inner *** new material reveals important morphological characters,including hemi-dimorphic fronds,two forms of sterile pinnae,short-stalked sori and sporangia on fertile fronds,annulus of sporangium composed of about 30 cells,in situ rounded triangular spores with protruded suture,and the lips of trilete laesura encircled by one or two rows of small *** on these observations,we emended the diagnosis of this common *** spatio-temporal distribution of Coniopteris simplex shows that the iconic species was restricted to the paleolatitudes ranging from 19.5°N to 48.9°N in the Northern hemisphere during the Early—Late Jurassic,mainly distributed in the tropical to paratropical zones,and the paleolongitude ranging from 9.6°E to 129.3°E,which may be limited by the opening of the Viking Corridor and the splitting of the Central Atlantic Ocean.

关键词： Coniopteris simplex Yan'an Formation Middle Jurassic Inner Mongolia Paleogeography

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Mineralogical properties and co-sintering characteristics of fluxed iron ore with magnetite concentrates

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Journal of Iron and Steel Research International 2024年第2期31卷 318-328页

作者： Le-le Niu Zheng-jian Liu Jian-liang Zhang Yao-zu Wang Zhen-xing Yang Si-da Li chang-dong Shan Ben Feng School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China Institute of Artificial Intelligence University of Science and Technology BeijingBeijing100083China Xinxing Casting Pipe Xinjiang Co. Bayingol841300XinjiangChina

To investigate the feasibility of co-sintering of fluxed iron ore with magnetite concentrates, the mineralogical properties of a novel fluxed iron ore were studied using particle size analysis, microscopic morphology characterization, and X-ray diffraction Rietveld analysis. Following that, the experiments for granulation performance and basic sintering characteristics were designed under seven different fluxed iron ore ratios, and the integrated ranking of different fluxed iron ore ratios was determined using gray relation analysis. Finally, the results of the industrial trails were combined with the feasibility analysis. Test and experimental results show that the fraction of the fluxed iron ore particles larger than 0.5 mm can account for more than 48%, and the particles have two morphologies: spherical-rough and flaky-smooth. Ca elements are found in the form of calcite (CaCO3) and dolomite (CaMg(CO3)2). The average particle size of granules and powder removal rate can be improved from 2.50 to 3.16 mm and 39.60% to 24.20%, respectively, with the increase in the fluxed iron ore ratio. Furthermore, the fluxed iron ore can improve assimilability and liquid fluidity of magnetite concentrates. In terms of overall granulation performance and sintering characteristics, the fluxed iron ore ratios are graded from best to worst as follows: 12%, 15%, 9%, 18%, 21%, 6% and 3%. The industrial trails show that when the fluxed iron ore ratio is increased, the beneficial effect of the superior sintering characteristics of the fluxed iron ore itself is ideally balanced with the negative effect of the lower amount of additional CaO at 12% ratio, and thus, it is feasible to bring the fluxed iron ore into production at a level of roughly 12%.

关键词： Fluxed iron ore Magnetite concentrate Granulation performance Sintering characteristics Gray relation analysis

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Amplification effect of intra-seasonal variability of soil moisture on heat extremes over Eurasia

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Advances in Climate change Research 2024年第1期15卷 1-8页

作者： Yi-Nuo WANG Zhi-Yan ZUO liang QIAO Kai-Wen ZHANG Mei-Yu chang Dong XIAO Zou-Xing LIN Huan WANG Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China CMA-FDU Joint Laboratory of Marine Meteorology Shanghai 200438China Key Laboratory of Cites Mitigation and Adaptation to Climate change in Shanghai China Meteorological AdministrationShanghai 200030China Collaborative Innovation Centeron Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 211800China Shanghai Frontiers Science Center of Atmosphere-Ocean Interaction Shanghai 200123China College of Geography and Resources Science Sichuan Normal UniversityChengdu 610101China National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary Shanghai 202183China Chinese Academy of Meteorological Sciences China Meteorological AdministrationBeijing 100081China

Drying soil has been conducive to a high frequency of extreme high-temperature events over many regions worldwide in recent ***,changes in the intraseasonal variability of soil moisture can also influence the likelihood of extremely high *** previous investigators have examined the association between extremely high temperatures and large-scale atmospheric circulation variability,the role of land-atmosphere coupling dominated by soil moisture variability in extremely high temperatures,particularly over the Eurasian continent,is not well *** this study,on the basis of the Land Surface,Snow,and Soil Moisture Model Intercomparison Project,we found that land-atmosphere feedback amplified the variability of soil moisture in most regions of Eurasia during summer from 1980 to *** amplification of soil moisture variability is closely correlated with more intensive intraseasonal variability of surface air temperature and more frequent occurrences of extreme high-temperature events,particularly in Europe,Siberia,Northeast Asia,and the Indochina *** correlation implies that increasing the intraseasonal variability of soil moisture results in a high likelihood of heat extremes during summer in most parts of Eurasia except Asian desert *** the intraseasonal timescale,the land-atmosphere coupling increases the variability of surface sensible heat flux and net long-wave radiation heating the atmosphere by intensifying the soil moisture variability,thus amplifying the variability of surface air temperature and enhancing the extreme high-temperature *** finding demonstrates the importance of changes in intraseasonal soil moisture variability for the increasing likelihood of heat extremes in summer.

关键词： Soil moisture Intraseasonal variability Land-atmosphere coupling heat extremes

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