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无模板插层-剥离勃姆石合成具有优异稳定性的多孔硅掺杂氧化铝二维纳米片

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Science China Materials 2024年第1期67卷 261-271页

作者：赵振祥杨军王春霖薛岩涛吴浩谢威龙吴萍萍王纯正邢伟汪毅庞春霞庞泉德王晓化南军白鹏阎子峰 State Key Laboratory of Heavy Oil Processing CNPC Key Laboratory of CatalysisCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China PetroChina Lanzhou Petrochemical Research Center Lanzhou 730060China Shandong Xinbo Chemical Technology Co. LtdWeifang 262404China Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin 300131China

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板... 详细信息

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板的情况下将勃姆石剥离成二维纳米片.该合成过程可放大到3 L,并获得厚度为2 nm的二维纳米片.此外,这些二维纳米片可组装成比表面为542 m^(2)g^(-1)和孔容为2.43 cm^(3)g^(-1)的勃姆石.在不同温度下对二维纳米片进行热/水热处理得到的多孔氧化铝其孔结构优于多数有机模板法合成的氧化铝,并表现出优异的吸附性能.本研究为合成二维勃姆石纳米片和多孔氧化铝材料提供了一种新策略.

关键词：多孔氧化铝纳米片模板合成勃姆石水热处理层间作用插层硅掺杂

A Truncated SVD-Based ARIMA Model for Multiple QoS Prediction in Mobile Edge Computing

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Tsinghua Science and Technology 2022年第2期27卷 315-324页

作者： Chao Yan Yankun Zhang Weiyi Zhong Can Zhang Baogui Xin the college of Economic and Management Shandong University of Science and TechnologyQingdao 266590China weifang Key Laboratory of Blockchain on Agricultural Vegetables Weifang University of Science and TechnologyWeifang 262700China the School of Computer Science Qufu Normal UniversityRizhao 276826China

In the mobile edge computing environments,Quality of Service(QoS)prediction plays a crucial role in web service *** of distinct features of mobile edge computing,i.e.,the mobility of users and incomplete historical QoS data,traditional QoS prediction approaches may obtain less accurate results in the mobile edge computing *** this paper,we treat the historical QoS values at different time slots as a temporal sequence of QoS *** incorporating the compressed matrices extracted from QoS matrices through truncated Singular Value Decomposition(SVD)with the classical ARIMA model,we extend the ARIMA model to predict multiple QoS values simultaneously and *** results show that our proposed approach outperforms the other state-of-the-art approaches in accuracy and efficiency.

关键词： edge computing QoS prediction Auto Regressive Integrated Moving Average(ARIMA) truncated Singular Value Decomposition(SVD)

Dynamical Analysis of Nonautonomous Trophic Cascade Chemostat Model with Regime Switching and Nonlinear Perturbations in a Polluted Environment

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Acta Mathematicae Applicatae Sinica 2023年第3期39卷 550-570页

作者： Ya-jie LI Hao-kun QI Zheng-bo CHANG Xin-zhu MENG college of Mathematics and Systems Science Shandong University of Science and TechnologyQingdao 266590China weifang Commercial college of Shandong Weifang 261011China college of Mathematics and Information Science Anshan Normal UniversityAnshan 114007China

This paper investigates the stochastic dynamics of trophic cascade chemostat model perturbed by regime switching, Gaussian white noise and impulsive toxicant input. For the system with only white noise interference, sufficient conditions for stochastically ultimate boundedness and stochastically permanence are obtained, and we demonstrate that the stochastic system has at least one nontrivial positive periodic solution. For the system with Markov regime switching, sufficient conditions for extinction of the microorganisms are established. Then we prove the system is ergodic and has a stationary distribution. The results show that both impulsive toxins input and stochastic noise have great effects on the survival and extinction of the microorganisms. Finally, a series of numerical simulations are presented to illustrate the theoretical analysis.

关键词： stochastic trophic cascade chemostat model Markov chain extinction and stochastic permanence periodic solution ergodicity

Prussian blue and collagen loaded chitosan nanofibers with NIR-controlled NO release and photothermal activities for wound healing

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Journal of Materials Science & Technology 2021年第34期93卷 17-27页

作者： Wenyu Wang Dejun Ding Kunpeng Zhou Man Zhang Weifen Zhang Fang Yan Ni Cheng college of Pharmacy Weifang Medical UniversityWeifang261053China

Nitric oxide(NO)has emerged as a potential wound therapeutic agent due to its pivotal role in the wound healing ***,NO-based therapy for clinical applications is still restricted due to its gaseous state and short *** we exploited a wound dressing by incorporating sodium nitroprusside doped prussian blue nanoparticals and Type I collagen into the chitosan/poly(vinyl alcohol)nanofibers through the electrospinning *** hybrid nanofibrous scaffold possess the excellent abilities of NIR controlled NO release,photothermal therapy,and imitation of extra-cellular matrix-like *** synergistic effects could enhance their anti-bactericidal effects in vitro and furthermore accelerate wound healing in vivo when compared to control *** analysis demonstrated the scaffold could promote fibroblast growth and accelerate ***,no apparent histological toxicology and negligible damage to major organs were observed,which provided sufficient biosafety for in vivo *** data indicate the fabricated hybrid nanofibrous scaffold could be used as an ideal candidate for accelerating wound healing and treating chronic wounds.

关键词： Wound healing Nitric oxide NIR controlled Prussian blue nanoparticals Photothermal therapy Nanofibrous scaffold

Health promotion and education proposal among Chinese female college students:eliminating cervical cancer is no longer a dream

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Infectious Diseases Research 2024年第3期5卷 32-41页

作者： Kui-Mei Zhang Nan Jiang Shu-Ling Zhang Mei-Hua Wu Xiao-Lei Song Ji-Xuan Liu Wen-Ming Cao Gynecology Department Shandong Changle People’s HospitalWeifang 262400China Gynecology Department Shenzhen Hospital of Integrated Traditional Chinese and Western MedicineShenzhen 518104China Gynecology Department Pingshan District Central HospitalShenzhen 518122China

Cervical cancer is a serious threat to women’s *** high-risk human papillomavirus(HPV)infection is a necessary factor for cervical cancer development and has become a serious public health threat to *** present,young women have become a high-risk group for potential HPV *** vaccination is an effective method to prevent HPV infection and related diseases and is a primary preventive measure for HPV infection-related *** study explores the influencing factors of female college students’willingness to receive HPV vaccination,their ability to understand college students’HPV awareness,their motivation for HPV vaccination,their behavioral skills related to HPV vaccination,their willingness to receive HPV vaccination and their vaccination *** aim of this study was to increase the HPV vaccination rate of Chinese female college students through health education programs and thus reduce the incidence of cervical cancer.

关键词： cervical cancer human papillomavirus HPV vaccination female college students

Behavior Characteristics of Asphalt Components during the Process of Nano-cracks Temperature Self-healing

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Journal of Wuhan University of Technology(Materials Science) 2023年第1期38卷 149-155页

作者：张海涛 ZHANG Qianhui LI Ming 于腾江 college of Civil Engineering Northeast Forestry UniversityHarbin 150040China Safety Production Technology Center of Heilongjiang Province Harbin 150040China School of Architecture Engineering Weifang UniversityWeifang 261061China

In order to investigate the behavior characteristics of asphalt components during the process of nano-cracks temperature self-healing(NTS),molecular simulation technology was used to simulate the temperature self-healing of *** on the determination of asphalts(virgin asphalt and aged asphalt),the proportional changes of asphalt components were *** distribution characteristics of asphalt components were obtained by marking different components in the process of *** the same time,the rationality of the micro simulation findings was confirmed by asphalt performance tests and infrared spectroscopy *** results show that different asphalt components have different behavior characteristics in the process of *** content of asphaltene and resin plays a key role in the process of NTS,while saturation and aromatics play an active role in the temperature self-healing before and after *** NTS is the result of the comprehensive action of different components,and the self-healing efficiency is proportional to the relative molecular *** effect of aging on the NTS is also realized by changing the proportion of asphalt components.

关键词： asphalt components behavior characteristics nano-cracks temperature self-healing molecular simulation

Factors Associated with PCV13 Vaccine Hesitancy in Parents under an Innovative Immunization Strategy:a Cross-Sectional Study—weifang City,Shandong Province,China,2021

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China CDC weekly 2023年第12期5卷 271-277页

作者： Yuanze Du Yan Wang Ting Zhang Libing Ma Shuyun Xie Yi Wang Yuan Yang Juanjuan Li Yushu Feng Yujue Wang Weiran Qi Weizhong Yang Jian Zhou Chunping Wang Luzhao Feng School of Public Health Weifang Medical UniversityWeifang CityShandong ProvinceChina School of Population Medicine&Public Health Chinese Academy of Medical Sciences/Peking Union Medical CollegeBeijingChina Department of Respiratory and Critical Care Medicine Affiliated Hospital of Guilin Medical UniversityGuilin CityGuangxi Zhuang Autonomous RegionChina Zhejiang Center for Disease Control and Prevention Hangzhou CityZhejiang ProvinceChina Division of immunization Center for Disease Control and PreventionWeifang CityShandong ProvinceChina Division of Infectious Diseases Chinese Center for Disease Control and PreventionBeijingChina School of Management Weifang Medical UniversityWeifang CityShandong ProvinceChina School of Dentistry University of California Los AngelesLos AngelesCAUnited States Division of Infectious Diseases Center for Disease Control and PreventionWeifang CityShandong ProvinceChina

Summary What is already known on this topic?Pneumococcal diseases(PDs)are serious threats to child *** vaccination is one of the most effective ways to prevent these diseases,the pneumococcal vaccination coverage rate is still relatively low in *** is added by this report?This study investigated the factors associated with 13-valent pneumococcal conjugate vaccine(PCV13)vaccine hesitancy in parents under an innovative immunization strategy.

关键词： China Strategy conjugate

Studies on Suction-Assisted Installation Behavior of Suction Caissons in Clay Under Various Undrained Shear Strengths

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China Ocean Engineering 2023年第6期37卷 989-999页

作者： LI Da-yong HOU Xin-yu ZHANG Yu-kun MA Shi-li LI Shan-shan Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and TechnologyQingdao 266590China college of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao 266580China college of Civil Engineering Weifang UniversityWeifang 261061China

Suction caissons are widely used for anchoring floating platform and offshore wind *** of the suction caisson into the desired position under the combination of its self-weight and applied suction resulted from pumping out the encased water is integral to practical *** tests were carried out to investigate the suctionassisted installation of suction caissons in clay under various undrained shear *** was found that there exists a critical penetration depth *** the penetration depth is smaller than the critical value,the soil plug undrained shear strength is higher than intact clay(i.e.,clay prior to installation).However,when the penetration depth is greater than the critical penetration depth,the undrained shear strength of soil plug is lower than intact *** critical value decreases with the increasing consolidation time and undrained shear strength of *** suction-assisted installation,cracks occur around suction *** installation way has little effect on the crack *** influence range(i.e.,the maximum distance between the crack and the suction caisson edge)was found to increase with the increasing friction coefficient of interface between the suction caisson wall and soil and decreases with the increasing soil undrained shear *** addition,the drained condition of the clay during installation is dominated by the caisson aspect ratio,the undrained shear strength and the friction coefficient between the caisson wall and *** to estimate the penetration resistance and the required suction to install the suction caisson are summarized.

关键词： suction caisson suction-assisted installation model tests undrained shear strength of clay soil deformation

Alterations in gut microbiota are related to metabolite profiles in spinal cord injury

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Neural Regeneration Research 2023年第5期18卷 1076-1083页

作者： Jian-Ning Kang Zheng-Fang Sun Xin-Yu Li Xiao-Di Zhang Zheng-Xin Jin Ce Zhang Ying Zhang Hui-Yun Wang Na-Na Huang Jian-Hao Jiang Bin Ning Central Hospital Affiliated to Shandong First medical University Shandong First Medical University&Shandong Academy of Medical SciencesJinanShandong ProvinceChina Department of Spinal Surgery Jinan Central HospitalCheeloo College of MedicineShandong UniversityJinanShandong ProvinceChina School of Clinical Medicine Weifang Medical UniversityWeifangShandong ProvinceChina Department of Traumatic Orthopedics Binzhou Medical University HospitalBinzhou Medical UniversityBinzhouShandong ProvinceChina

Studies have shown that gut microbiota metabolites can enter the central nervous system via the blood-spinal cord barrier and cause neuroinflammation, thus constituting secondary injury after spinal cord injury. To investigate the correlation between gut microbiota and metabolites and the possible mechanism underlying the effects of gut microbiota on secondary injury after spinal cord injury, in this study, we established mouse models of T8–T10 traumatic spinal cord injury. We used 16 S rRNA gene amplicon sequencing and metabolomics to reveal the changes in gut microbiota and metabolites in fecal samples from the mouse model. Results showed a severe gut microbiota disturbance after spinal cord injury, which included marked increases in pro-inflammatory bacteria, such as Shigella, Bacteroides, Rikenella, Staphylococcus, and Mucispirillum and decreases in anti-inflammatory bacteria, such as Lactobacillus, Allobaculum, and Sutterella. Meanwhile, we identified 27 metabolites that decreased and 320 metabolites that increased in the injured spinal cord. Combined with pathway enrichment analysis, five markedly differential amino acids(L-leucine, L-methionine, L-phenylalanine, L-isoleucine and L-valine) were screened out, which play a pivotal role in activating oxidative stress and inflammatory responses following spinal cord injury. Integrated correlation analysis indicated that the alteration of gut microbiota was related to the differences in amino acids, which suggests that disturbances in gut microbiota might participate in the secondary injury through the accumulation of partial metabolites that activate oxidative stress and inflammatory responses. Findings from this study provide a new theoretical basis for improving the secondary injury after spinal cord injury through fecal microbial transplantation.

关键词： 16S rRNA gene amplicon sequencing amino acid metabolism dysbacteriosis gut microbiota inflammation metabolic disturbance metabolites metabolomics secondary injury spinal cord injury