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Pumping-induced Well Hydraulics and Groundwater Budget in a Leaky Aquifer System with Vertical Heterogeneity in Aquitard Hydraulic Properties

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Acta Geologica Sinica(English Edition) 2024年第2期98卷 477-490页

作者： ZHUANG Chao LÜChenyang yaN long LI yabing zhou Zhifang WANG Jinguo DOU Zhi Walter A.ILLMAN School of Earth Sciences and Engineering Hohai UniversityNanjing 211100China School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTU.K. Department of Modern Mechanics University of Science and Technology of ChinaHefei 230027China Department of Earth and Environmental Sciences University of WaterlooOntario N2L 3G1Canada

In groundwater hydrology,aquitard heterogeneity is often less considered compared to aquifers,despite its significant impact on groundwater hydraulics and groundwater resources evaluation.A semi-analytical solution is derived for pumping-induced well hydraulics and groundwater budget with consideration of vertical heterogeneity in aquitard hydraulic conductivity(K)and specific storage(S_(s)).The proposed new solution is innovative in its partitioning of the aquitard into multiple homogeneous sub-layers to enable consideration of various forms of vertically heterogeneous K or S_(s).Two scenarios of analytical investigations are explored:one is the presence of aquitard interlayers with distinct K or S_(s) values,a common field-scale occurrence;another is an exponentially depth-decaying aquitard S_(s),a regional-scale phenomenon supported by statistical *** investigations reveal that a low-K interlayer can significantly increase aquifer drawdown and enhance aquifer/aquitard depletion;a high-S_(s) interlayer can noticeably reduce aquifer drawdown and increase aquitard *** of low-K or high-S_(s) interlayers also significantly impact well hydraulics and groundwater *** the context of an exponentially depth-decaying aquitard S_(s),a larger decay exponent can enhance aquifer *** using current models with a vertically homogeneous aquitard,half the sum of the geometric and harmonic means of exponentially depth-decaying aquitard S_(s) should be used to calculate aquitard depletion and unconfined aquifer leakage.

关键词： hydrogeology aquitard vertical heterogeneity semi-analytical solution well hydraulics groundwater budget

Malicious webshell family dataset for webshell multi-classification research

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Visual Informatics 2024年第1期8卷 47-55页

作者： Ying Zhao Shenglan Lv Wenwei long Yilun Fan Jian Yuan Haojin Jiang Fangfang zhou School of Computer Science and Engineering Central South UniversityChangshaHunanChina Alibaba Cloud Intelligence Business Group Alibaba CloudBeijingChina

Malicious webshells currently present tremendous threats to cloud *** relevant studies and open webshell datasets consider malicious webshell defense as a binary classification problem,that is,identifying whether a webshell is malicious or ***,a fine-grained multi-classification is urgently needed to enable precise responses and active defenses on malicious webshell *** paper introduces a malicious webshell family dataset named MWF to facilitate webshell multiclassification *** dataset contains 1359 malicious webshell samples originally obtained from the cloud servers of Alibaba *** of them is provided with a family *** samples of the same family generally present similar characteristics or *** dataset has a total of 78 families and 22 ***,this paper introduces the human–machine collaboration process that is adopted to remove benign or duplicate samples,address privacy issues,and determine the family of each *** paper also compares the distinguished features of the MWF dataset with previous datasets and summarizes the potential applied areas in cloud security and generalized sequence,graph,and tree data analytics and visualization.

关键词： Open dataset Webshell Webshell family Cloud security

Sharp Interface Limit for the One-dimensional Compressible Navier-Stokes/Allen-Cahn System with Composite Waves

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Acta Mathematicae Applicatae Sinica 2024年

作者： ya-zhou CHEN Yi PENG Xiao-ding SHI School of Mathematics and Physics Beijing University of Chemical Technology

This paper is concerned with the sharp interface limit of Cauchy problem for the one-dimensional compressible Navier-Stokes/Allen-Cahn system with a composite wave consisting of the superposition of a rarefaction wave and a shock wave. Under the assumption that the viscosity coefficient and the reciprocal of mobility coefficient are directly proportional to the interface thickness, we first convert the sharp interface limit of the system into the large time behavior of the composite wave via a natural scaling. Then we prove that the composite wave is asymptotically stable under the small initial perturbations and the small strength of the rarefaction and shock wave. Finally, we show the solution of the Cauchy problem exists for all time, and converges to the composite wave solution of the corresponding Euler equations as the thickness of the interface tends to zero. The proof is mainly based on the energy method and the relative entropy.

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Ultra-broadband and wide-angle reflective terahertz polarization conversion metasurface based on topological optimization

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Chinese Physics B 2024年第10期33卷 287-294页

作者： ya-Jie Zhang Chao-long Li Jia-Qi Luan Ming Zhao Ding-Shan Gao Pei-Li Li Faculty of Electrical and Optical Engineering Nanjing University of Posts and CommunicationsNanjing 210023China Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and TechnologyWuhan 430074China

Terahertz polarization conversion devices have significant potential applications in various fields such as terahertzimaging and *** this paper,we utilize genetic algorithms to topologically optimize the metasurface unit cellsand design a reflective linear polarization conversion metasurface with ultra-broadband and wide-angle *** partitioning the metallic pattern layer into quadrants,the encoding length is effectively reduced,resulting in a shorteroptimization *** research results indicate that the converter possesses a polarization conversion efficiency ratio higherthan 90%and a relative bandwidth ratio of 125%in a range of 0.231-0.995 ***,it can maintain excellentpolarization conversion properties when the incident angle of terahertz waves is less than 45°and the polarization angle isless than 15°,demonstrating excellent *** insights are provided for the design of terahertz wide-angle ultrawidebandpolarization conversion devices,and the proposed metasurfce has potential applications in terahertz polarizationimaging,spectroscopy and communication fields.

关键词： metasurface polarization conversion topology optimization ultra-broadband

An increment of diversity method for cell state trajectory inference of time-series scRNA-seq data

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Fundamental Research 2024年第4期4卷 770-776页

作者： yan Hong Hanshuang Li Chunshen long Pengfei Liang Jian zhou Yongchun Zuo State Key Laboratory of Reproductive Regulation and Breeding of Grassland Livestock Institutes of Biomedical SciencesCollege of Life SciencesInner Mongolia UniversityHohhot010020China

The increasing emergence of the time-series single-cell RNA sequencing(scRNA-seq)data,inferring developmental trajectory by connecting transcriptome similar cell states(i.e.,cell types or clusters)has become a major *** existing computational methods are designed for individual cells and do not take into account the available time series *** present IDTI based on the Increment of Diversity for Trajectory Inference,which combines time series information and the minimum increment of diversity method to infer cell state trajectory of time-series scRNA-seq *** apply IDTI to simulated and three real diverse tissue development datasets,and compare it with six other commonly used trajectory inference methods in terms of topology similarity and branching *** results have shown that the IDTI method accurately constructs the cell state trajectory without the requirement of starting *** the performance test,we further demonstrate that IDTI has the advantages of high accuracy and strong robustness.

关键词： Increment of diversity Time-series scRNA-seq data Cell state trajectory inference Topology similarity Branching accuracy

Protective mechanism of quercetin compounds against acrylamide-induced hepatotoxicity

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Food Science and Human Wellness 2024年第1期13卷 225-240页

作者： Linzi Li Xueying Lei Lin Chen ya Ma Jun Luo Xuebo Liu Xinglian Xu Guanghong zhou Xianchao Feng College of Food Science and Engineering Northwest A&F UniversityYangling 712100China College of Animal Science and Technology Northwest A&F UniversityYangling 712100China Synergetic Innovation Center of Food Safety and Nutrition Key Laboratory of Meat Processing and Quality ControlMinistry of EducationCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095China

Quercetin compounds have antioxidant,anti-inflammatory and anticancer pharmacological *** exposure to acrylamide(AA)can cause liver injury and endanger human ***,whether quercetin compounds can attenuate AA-induced liver injury and the specific mechanism are not ***,we studied the mechanism and structure-activity relationship of quercetin compounds in reducing AA-induced hepatotoxicity in vivo and in *** vivo studies found that quercetin-like compounds protect against AAinduced liver injury by reducing oxidative stress levels,activating the Akt/m TOR signaling pathway to attenuate autophagy,and improving mitochondrial apoptosis and endoplasmic reticulum stress-mediated *** vitro studies found that quercetin compounds protected Hep G2 cells from AA by attenuating the activation of AA-induced autophagy,lowering reactive oxygen species(ROS)levels by exerting antioxidant effects and thus attenuating oxidative stress,increasing mitochondrial membrane potential(MMP),and improving apoptosis-related proteins,thus attenuating AA-induced ***,the conformational differences between quercetin compounds correlated with their protective capacity against AA-induced hepatotoxicity,with quercetin showing the best protective capacity due to its strongest antioxidant *** conclusion,quercetin compounds can protect against AA-induced liver injury through multiple pathways of oxidative stress,autophagy and apoptosis,and their protective capacity correlates with antioxidant activity.

关键词： Quercetin compounds Acrylamide Protection mechanism Oxidative stress Antioxidant activity

Concomitant hepatocellular carcinoma recurrence and mantle cell lymphoma

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Hepatobiliary & Pancreatic Diseases International 2024年第4期23卷 434-437页

作者： Liang Xue Da-long Wan Chen Hu Qing-Hong Ke Jie zhou yan Shen Department of Hepatobiliary and Pancreatic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

To the Editor:Mantle cell lymphoma(MCL)is a rare subgroup of B-cell nonHodgkin’s lymphoma(NHL)that occurs in approximately 6%of NHL *** hepatitis and cirrhosis may promote hepatocellular carcinoma(HCC)***,we report a... 详细信息

关键词： lymphoma hepatocellular NHL

Patterned microsphere-lens projection lithography using an electrohydrodynamic-jetprinting-assisted assembly

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Photonics Research 2024年第7期12卷 1502-1512页

作者： ya ZHONG HAIBO YU PEILIN zhou HONGJI GUO TIANMING ZHAO HAO LUO yaNGDONG WEN XIAODUO WANG LIANQING LIU State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China College of Mechanical and Electrical Engineering Henan Agricultural UniversityZhengzhou 450002China Institute of Urban Rail Transportation Southwest Jiaotong UniversityChengdu 610000China

Microlens arrays have been widely used in the fields of micro-optics and micro-and nanofabrication. Traditional preparation methods utilize commercial photoresists and thermosetting materials, thereby restricting the optical properties of microlenses. In recent years, significant advancements have been achieved in near-field super-resolution imaging by utilizing microspheres and forming arrays of microsphere lenses via self-assembly. However, self-assembly approaches lack flexibility in terms of pattern selection. This study proposes a method that utilizes electrohydrodynamic jet (E-jet) printing to code ultraviolet (UV)-curable adhesives and assist in the assembly of patterned microsphere-lens arrays. Simulation results demonstrate that the UV-curable adhesive has little impact on the optical properties of the microsphere lens. Moreover, the microsphere lens exhibits a superior imaging resolution compared with traditional microlenses. A projection-lithography system is developed to achieve an accurate alignment between the focal plane of the microsphere lenses and the plane of the photoresist, facilitating the fabrication of patterned nanostructures. The lithographic nanostructures have a minimum feature size of 850 nm. This method enables the fabrication of arrays of microsphere lenses with arbitrary patterns and presents an inexpensive and simple strategy for fabricating micro-and nanostructure arrays with submicrometer features.

关键词： projection utilize utilizing

Lightweight,Strong and High Heat-Resistant Poly(lactide acid)Foams via Microcellular Injection Molding with Self-Assembly Nucleating Agent

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Chinese Journal of Polymer Science 2024年第6期42卷 739-750页

作者： Xiao-Hu Bing Wen-Yu Ma Ming-Hui Wu Peng Gao Xiao zhou Hai-Bin Luo long Wang Wen-Ge Zheng School of materials Science and Engineering Shanghai UniversityShanghai200444China Ningbo Key Lab of Polymer Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China

Poly(lactide acid)(PLA)foams have shown considerable promise as eco-friendly alternatives to nondegradable plastic foams,such as polystyrene(PS)***,PLA foam typically suffers from low heat-resistance and poor cellular structure stemming from its inherent slow crystallization rate and low melt *** this study,a high-performance PLA foam with well-defined cell morphology,exceptional strength and enhanced heat-resistance was successfully fabricated via a core-back microcellular injection molding(MIM)*** scanning calorimetry(DSC)results revealed that the added hydrazine-based nucleating agent(HNA)significantly increased the crystallization temperature and accelerated the crystallization process of ***,the addition of a 1.5 wt%of HNA led to a significant reduction in PLA’s cell size,from 43.5µm to 2.87µm,and a remarkable increase in cell density,from 1.08×10^(7)cells/cm^(3)to 2.15×10^(10)cells/cm^(3).This enhancement resulted in a final crystallinity of approximately 55.7%for the PLA blend foam,a marked improvement compared to the pure PLA ***,at 1.5 wt%HNA concentration,the tensile strength and tensile toughness of PLA blend foams demonstrated remarkable improvements of 136%and 463%,***,the Vicat softening temperature of PLA blend foam increased significantly to 134.8°C,whereas the pure PLA foam exhibited only about 59.7℃.These findings underscore the potential for the preparation of lightweight injection-molded PLA foam with enhanced toughness and heat-resistance,which offers a viable approach for the production of high-performance PLA foams suitable for large-scale applications.

关键词： Poly(lactide acid) Nucleating agent Microcellular injection molding Heat-resistance Toughness