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Changes in Sediment Sources in the Southern Muddy Area of Weihai, China, Since the Late Pleistocene: A record from rare Earth Elements

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Journal of Ocean University of China 2024年第5期23卷 1221-1232页

作者： ZHAng Zhichao liu Jinqing YIN Ping CAO Ke FEng xiaokun WAng Shengyu College of Earth Science and Engineer.ng Shandong University of Science and Technology State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Qingdao Institute of Marine Geology China Geological Survey

The small muddy areas developed in the southern Shandong Peninsula have attracted increasing attention from researchers because of complex changes in sediment sources driven by sea-level fluctuations and land-sea interactions since the late Pleistocene. This study investigates the evolution of sediment sources and their responses to environmental changes since the late Pleistocene, using core WHZK01 collected from the nearshore muddy area in southern Weihai for rare earth element(rEE) analysis. In doing so, this work highlights the changing patterns of material sources and the primary control factors. The results reveal that the sedimentary deposits in core WHZK01 exhibit distinct terrestrial characteristics. Discriminant function analysis(FD) and source discrimination diagrams both suggest that the primary sources of these deposits are the Yellow river and adjacent small and medium-sized rivers, although the sources vary among different sedimentary units. Furthermore, the DU3 layer(17.82 – 25.10 m) displays typical riverine sedimentation, dominated by terrestrial detrital input, primarily from the local rivers, namely the Huanglei and Muzhu rivers. The material in the DU2 layer(14.91 – 17.82 m) is mainly influenced by a mixture of the Qinglong and Yellow rivers. The DU1 layer(0 – 14.91 m) is influenced by sea-level changes dur.ng the Holocene, with the Yellow river being the primary source, although there is also some input from local rivers. The changes in sea level dur.ng the Holocene and the input of Yellow river material carried by the coastal currents of the Yellow Sea are identified as the main controlling factors for the changes in material sources in the study area since the late Pleistocene, with small and medium-sized rivers also exerting some influence on the material sources. The above mentioned findings not only contribute to a better understanding of the source-sink systems of the Yellow river and adjacent small and mediumsized rivers but also deepen

关键词： environmental evolution muddy area rare earth element source identification southern Weihai

A review of Type 1 and Type 2 Intraductal Papillary Neoplasms of the Bile Duct

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Current Medical Science 2024年第3期44卷 485-493页

作者： Xia-hui HUAng Tian-xiang CHEN Hong-liang liu Ming-wen HUAng Department of General Surgery The Second Affiliated Hospital of Nanchang UniversityNanchang330006China

Intraductal papillary neoplasm of the bile duct(IPNB)is a heterogeneous disease similar to intraductal papillary mucinous neoplasm of the *** lesions have been recognized as one of the three major precancerous lesions in the biliary tract since *** 2018,Japanese and Korean pathologists reached a consensus,classifying IPNBs into type l and type 2 *** are more prevalent in male patients in East Asia and are closely related to diseases such as cholelithiasis and *** a molecular genetic perspective,IPNBs exhibit early genetic variations,and different molecular pathways may be involved in the tumorigenesis of type 1 and type 2 *** histological subtypes of IPNBs include gastric,intestinal,pancreaticobiliary,or oncocytic subtypes,but type 1 IPNBs typically exhibit more regular and well-organized histological features than type 2 IPNBs and are more commonly found in the intrahepatic bile ducts with abundant *** to the rarity of these lesions and the absence of specific clinical and laboratory features,imaging is crucial for the preoperative diagnosis of IPNB,with local bile duct dilation and growth along the bile ducts being the main imaging *** resection remains the optimal treatment for IPNBs,but negative bile duct margins and the removal of lymph nodes in the hepatic hilum significantly improve the postoperative survival rates for patients with IPNBs.

关键词： intraductal papillary neoplasm of the bile duct subclassification neoplasms precancerous tissue prognosis

2019~2021年河南省区域背景臭氧浓度估算

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环境科学 2024年第8期45卷 4411-4418页

作者：刘晓咏颜俊刘航苏方成姚丹牛继强闫军辉信阳师范大学地理科学学院信阳464000 信阳师范大学河南省水土环境污染协同防治重点实验室信阳464000 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室北京100029 郑州大学化学学院郑州450001 河南师范大学环境学院新乡453007

厘清臭氧(O_(3))区域传输和本地生成贡献对控制O_(3)污染有重要意义.为量化区域背景O_(3)浓度及其时空变化,采用包括主成分分析(PCA)和TCEQ法在内的多种方法,以河南省为案例进行了综合研究.基于2019~2021年河南省59个国控站监测数据,使... 详细信息

厘清臭氧(O_(3))区域传输和本地生成贡献对控制O_(3)污染有重要意义.为量化区域背景O_(3)浓度及其时空变化,采用包括主成分分析(PCA)和TCEQ法在内的多种方法,以河南省为案例进行了综合研究.基于2019~2021年河南省59个国控站监测数据,使用4种方法估算区域背景O_(3)浓度.方法1是传统方法,进行O_(3)单变量-多站点的PCA分析.方法2使用二氧化氮和气象参数作为约束条件,进行多变量-单站点的PCA分析.方法3将PCA和多元线性回归(MLr)结合,借鉴源解析思想,确定区域背景贡献.方法4为TCEQ法,将观测的最低O_(3)-8h浓度作为区域背景.结果表明,方法1和方法2估算的区域背景ρ(O_(3)-8h)基本相等,方法3和方法4估算的浓度比方法1低约37~60μg·m^(-3).2019~2021年,方法1~4估算的区域背景ρ(O_(3)-8h)变化分别为1.6、-13.4、5.9和-3.5μg·m^(-3).多种方法平均估算结果表明,2019~2021年河南省区域背景ρ(O_(3)-8h)分别为82.0、79.0和79.7μg·m^(-3),分别占区域O_(3)-8h总量的75.9%、76.4%和78.7%.4种方法估算的区域背景O_(3)都有明显的季节变化,呈夏季>春季>秋季>冬季的特征.

关键词：臭氧(O_(3)) 背景浓度主成分分析(PCA) TCEQ法多元线性回归(MLr)

Should Low-Frequency-High-Consumption Enterprises Add Online-to-Offline Platforms?An Empirical Study Using the VAr Model

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Journal of Systems Science and Information 2024年第1期12卷 81-95页

作者： Wei LI Ying liu Haizhen YAng Sha ZHAng Binhong XU School of Economics and Management Univeristy of Chinese Academy of SciencesBeijing 100190China School of Business University of Chinese Academy of Social SciencesBeijing 102488China

This study investigates the impact of online-to-offline(O2O)platforms,such as *** and Meituan,on offline sales in low-frequency-high-consumption industries,specifically a mid-to-highend liquor distribution *** data from 77 offline stores in Beijing collected dur.ng 2019-2022,the study employs a VAr model to analyze the relationship between offline sales and the use of O2O *** results reveal a long-term equilibrium between the two,with most indicators showing a positive impact of O2O platforms on offline *** research provides valuable insights for lowfrequency-high-consumption enterprises in making multi-channel decisions and quantifies the impact of O2O platforms on offline sales.

关键词： O2O platform low-frequency-high-consumption liquor distribution chain enterprise store sales VAr model

二维BeB_(2)作为镁离子电池阳极材料的理论研究

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物理学报 2024年第11期73卷 336-345页

作者：李欣悦高国翔高强刘春生叶小娟南京邮电大学集成电路科学与工程学院南京210023 南京邮电大学电子与光学工程学院南京210023

为了加快镁离子电池的开发与应用,寻找合适的镁离子电池阳极材料势在必行.此外,具有较低摩尔质量的阳极材料有利于获得较高的理论存储容量.因此,本文采用基于密度泛函理论的第一性原理计算系统地研究了BeB_(2)单层材料作为镁离子电池阳... 详细信息

为了加快镁离子电池的开发与应用,寻找合适的镁离子电池阳极材料势在必行.此外,具有较低摩尔质量的阳极材料有利于获得较高的理论存储容量.因此,本文采用基于密度泛函理论的第一性原理计算系统地研究了BeB_(2)单层材料作为镁离子电池阳极的潜力.计算结果表明,基于声子谱检测,BeB_(2)结构展现了优异的动力学稳定性.此外,从BeB_(2)的能带结构可以看到清晰的狄拉克锥,表明其具有良好的导电性能.BeB_(2)可以稳定吸附镁离子,并且镁离子在该材料上表现了较低的扩散势垒(0.04 eV),这意味着更快的充放电速率.重要的是,BeB_(2)展现了超高的理论容量(5250 mA·h·g^(–1))、较低平均开路电压(0.33 V)以及较小的体积膨胀(2%).此外,Mg离子在双层BeB_(2)结构中的吸附能为–1.38—–2.24 eV,扩散势垒为0.134—0.84 eV.综合以上性能,我们相信BeB_(2)可以作为一种优秀的镁离子电池阳极材料.

关键词：镁离子电池二维材料第一性原理计算

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Traditional Chinese Medicine Erhuang Suppository for Treatment of Persistent High-risk Human Papillomavirus Infection and Its Impact on Transcriptome of Uterine Cervix

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当代医学科学（英文） 2024年第4期44卷 841-853页

作者： Zi-zhuo WAng Hui-li WAng Wei XIOng Juan DU r.ng liu Department of Obstetrics and Gynecology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Department of Pharmacology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:High-risk human papillomavirus(Hr-HPV)infection is the chief cause of cervical intraepithelial neoplasia(CIN)and cervical *** Erhuang suppository(EHS)is a traditional Chinese medicine(TCM)prepared from realgar(As2S2),Coptidis rhizoma,alumen,and borneolum syntheticum and has been used for antiviral and antitumor ***,whether EHS can efficiently alleviate Hr-HPV infection remains *** study was conducted to evaluate the efficacy of EHS for the treatment of persistent Hr-HPV infection in the uterine ***:In this study,we evaluated the therapeutic efficacy of EHS in a randomized controlled clinical trial with a 3-month ***,70 patients with persistent Hr-HPV infection were randomly assigned to receive intravaginal administration of EHS or *** DNA,ThinPrep cytologic test(TCT),colposcopy,and safety evaluation were carried out after *** analysis was performed to compare transcriptome profiles before and after EHS treatment.A K14-HPV16 mouse model was generated to confirm the efficiency of ***:After 3 months,74.3％(26/35)of the patients in the treatment group were HPV negative,compared to 6.9％(2/29)in the placebo ***-throughput microarrays revealed distinct transcriptome profiles after *** differentially expressed genes were significantly enriched in complement activation,immune response,and apoptotic *** K14-HPV16 mouse model also validated the remarkable efficacy of ***:This study demonstrated that EHS is effective against Hr-HPV infection and cervical ***,no obvious systemic toxicity was observed in patients dur.ng the *** superior efficacy and safety of EHS demonstrated its considerable value as a potential cost-effective drug for the treatment of HPV infection and HPV-related cervical diseases.

关键词： Erhuang suppository Traditional Chinese Medicine cervical diseases human papillomavirus transcriptomics

Attribution analysis of groundwater level fluctuation in the Xinxiang section of the Lower Yellow river's suspended river after the construction of the xiaolangdi reservoir

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Journal of Geographical Sciences 2024年第7期34卷 1348-1370页

作者： LI He PIng Jianhua LEng Wei MEI Xuemei ZHAng Min liu Jiaqi School of Water Conservancy and Transportation Zhengzhou UniversityZhengzhou450001China College of Ecology and Environment Zhengzhou UniversityZhengzhou450001China Geothermal and Ecological Geology research Center Zhengzhou UniversityZhengzhou450001China Institute of Geology and Geophysics CASBeijing100101China

The clear identification and quantification of the factors affecting groundwater systems is crucial for protecting groundwater resources and ensur.ng safety in agricultural *** Lower Yellow river(LYr)is a suspended river that replenishes groundwater continuously due to clear differences in the water head,especially in the Xinxiang *** its construction,the xiaolangdi reservoir has reversed the LYr’s *** accurately determine the factors influencing the groundwater level(GWL),the study area was divided into five subzones based on hydrogeology.A dynamic factor model(DFM),variational mode decomposition(VMD),and a multiple linear regression model were used to identify and quantify the factors influencing the *** impact of the suspended river on the groundwater before and after the construction of the xiaolangdi reservoir was *** results show that:(1)The rate of decrease in the GWL was 8.53×10^(–4)m/month,and the rate of decrease in the Yellow river water level(rWL)was 4.63×10^(–4)m/month.(2)Mountain front recharge(MFr)(scale=3 months)and precipitation(scale=9 months)were the dominant factors in subzones I and II,accounting for more than 40%of the fluctuation in the *** III was dominated by exploitation(scale=7 months)and precipitation(scale=12months),accounting for 28.43%,and 23.44%of changes in the GWL,*** subzone IV,agricultural irrigation(scale=12 months)was the major factor,accounting for32.47%of GWL changes,while in subzone V,the rWL(scale=12 months)accounted for52.52%of these changes.(3)The xiaolangdi reservoir has increased the lateral seepage of the suspended river and altered the inter-annual *** results of this study can provide a valuable reference for controlling groundwater overexploitation and ensur.ng water supply security.

关键词： groundwater level influencing factor dynamic factor analysis xiaolangdi reservoir Lower Yellow river lateral seepage of the Yellow river

Damage degradation mechanism and macro-meso structural response of mudstone after water wetting

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Journal of Mountain Science 2024年第8期21卷 2825-2843页

作者： SHAO Zhixin SOng Yanqi ZHEng Junjie SHEN Fuxin liu Chuanpeng YAng Juntao School of Mechanics and Civil Engineer.ng China University of Mining and Technology(Beijing)Beijing 100083China State Key Laboratory of Coal resources and Safe Mining China University of Mining&Technology(Beijing)Beijing 100083China

The predominant presence of weak interlayers primarily composed of mudstone renders them highly susceptible to a reduction in bear.ng capacity due to the water-rock weakening effect,significantly impacting the safety of open-pit mining *** study focuses on the weak mudstone layers within open-pit mine *** mineral composition of mudstone and the microstructure evolution characteristics before and after water wetting were analyzed by X-ray diffraction(XrD)and scanning electron microscope(SEM).The meso-structure and parameter variation characteristics of mudstone interior space after water-rock interaction were quantified by computed tomography scanning test,and the damage variable characterization method was ***,according to the uniaxial compression test,the degradation characteristics of the macroscopic mechanical behavior of mudstone under different water wetting time were explored,and the elastic modulus and str.ngth attenuation model of mudstone based on mesoscopic damage were ***,building upon the macro-meso structural response characteristics of mudstone,an exploration of the failure characteristics and deterioration mechanism under the influence of water-rock interactions was *** results show that the water-rock interaction makes the internal defects of mudstone gradually develop and form a fracture network structure,which eventually leads to the deterioration of its macroscopic mechanical *** porosity,fractal dimension and damage characteristics of mudstone show an exponential trend with the increase of water wetting ***,the deterioration mechanism of mudstone after water wetting are postulated to encompass factors such as the hydrophilicity of mineral molecular structures,hydration stress and expansion effects on clay particles,as well as the spatial distribution of microcracks and the phenomenon of fracture *** outcomes of this research endeavor aim to provide cer

关键词： Moisture absorption of mudstone Computed tomography scanning test Fracture structure evolution Macro-meso structural response Deterioration mechanism

Equitable Cluster Partition of Planar Graphs with Girth at Least 12

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Journal of Mathematical research with Applications 2024年第2期44卷 152-160页

作者： xiaoling liu Lei SUN Wei ZHEng Department of Mathematics and Statistics Shandong Normal University

An equitable(Ok1, Ok2,..., Okm)-partition of a graph G, which is also called a k cluster m-partition, is the partition of V(G) into m non-empty subsets V1, V2,..., Vm such that for every integer i in {1, 2,..., m}, G[Vi] is a graph with components of order at most k, and for each distinct pair i, j in {1,..., m}, there is-1 ≤ |Vi|-|Vj| ≤ 1. In this paper, we proved that every planar graph G with minimum degree δ(G) ≥ 2 and girth g(G) ≥ 12 admits an equitable(O71, O72,..., O7m)-partition, for any integer m ≥ 2.

关键词： equitable cluster partition planar graph girth discharging