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Bioinspired polysaccharide-based nanocomposite membranes with robust wet mechanical properties for guided bone regeneration

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National Science Review 2024年第3期11卷 215-226页

作者： Jian-Hong Xiao Zhen-Bang Zhang JiaHao li Si-Ming Chen Huai-ling Gao YinXiu liao Lu Chen ZiShuo Wang YiFan Lu YuanZhen Hou HengAn Wu DuoHong Zou Shu-Hong Yu Department of Chemistry New Cornerstone Science Laboratory Institute of Biomimetic Materials&Chemistry Anhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&Chemistry Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Department of Dental Implant Center Stomatologic Hospital and College Key Laboratory of Oral Diseases Research of Anhui Province Anhui Medical University CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics CAS Center for Excellence in Complex System Mechanics University of Science and Technology of China Department of Oral Surgery College of Stomatology National Clinical Research Center for Oral DiseasesShanghai Key Laboratory of Stomatology Shanghai Research Institute of Stomatology Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Institute of Innovative Materials(I2M) Department of Chemistry Department of Materials Science and Engineering Southern University of Science and Technology

Polysaccharide-based membranes with excellent mechanical properties are highly desired. However, severe mechanical deterioration under wet conditions limits their biomedical applications. Here, inspired by the structural heterogeneity of strong yet hydrated biological materials, we propose a strategy based on heterogeneous crosslink-and-hydration（HCH） of a molecule/nano dual-scale network to fabricate polysaccharide-based nanocomposites with robust wet mechanical properties. The heterogeneity lies in that the crosslink-and-hydration occurs in the molecule-network while the stress-bearing nanofiber-network remains unaffected. As one demonstration, a membrane assembled by bacterial cellulose nanofiber-network and Ca2+-crosslinked and hydrated sodium alginate molecule-network is designed. Studies show that the crosslinked-and-hydrated molecule-network restricts water invasion and boosts stress transfer of the nanofiber-network by serving as interfibrous bridge. Overall, the molecule-network makes the membrane hydrated and flexible; the nanofiber-network as stress-bearing component provides strength and *** HCH dual-scale network featuring a cooperative effect stimulates the design of advanced biomaterials applied under wet conditions such as guided bone regeneration membranes.

关键词： bioinspiration heterogeneous crosslink-and-hydration dual-scale network nanocomposite membrane wet mechanical properties guided bone regeneration

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Single Zn atoms anchored on hollow carbon nanofiber network for dendrite-free lithium metal anode of flexible li–S full cell

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Rare Metals 2023年第11期42卷 3705-3717页

作者： Zhi-Feng Wang Hong-Ying Wang Xiao-li liu Yan-Xu Chen Yan Zhao Yong-Guang Zhang Qi-Qi Han Chun-ling Qin Zhumabay Bakenov Yi-Chao Wang Xin Wang School of Materials Science and engineering Hebei University of TechnologyTianjin300401China School of Materials Science and engineering Hebei University of Science and TechnologyShijiazhuang050018China South China Academy of Advanced Optoelectronics and International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangzhou510006China Shanxi Supercomputing Center Lvliang033000China Department of Chemical and Materials engineering National Laboratory AstanaNazarbayev University010000Nur-SultanKazakhstan School of life and environmental Sciences Deakin UniversityWaurn PondsGeelongVIC3216Australia

The attractive energy density of lithium-sulfur(li-S)batteries makes them desirable energy storage systems;however,the slow reaction kinetics and formation of lithium dendrites prevent them from reaching full *** address this issue,hierarchical porous carbon nanofibers network containing Zn single atoms(ZnSA@HPCNF)is synthesized by electrospinning and *** structure serves as the main anode body,providing excellent chemical anchoring and *** uniform distribution of Zn single atoms and N4coordination supports uniform deposition and continuous plating/stripping of *** results show that the li|li/ZnSA@HPCNF symmetrical battery presents stable and low overpotential during 700-and 900-h iterative plating/stripping process at1 and 5 mA·cm^(-2),***,the S/CNT||li/ZnSA@HPCNF full cell shows good flexibility,reversible capacity and cycling *** work provides a lithium host strategy based on single-atom dispersed hierarchical porous carbon network,enabling the design of rational lithium metal anodes for use in flexible li-S full cells.

关键词： Single atom lithium metal anode lithium deposition lithium-sulfur battery

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fMRI-based Decoding of Visual Information from Human Brain Activity: A Brief Review

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International Journal of Automation and computing 2021年第2期18卷 170-184页

作者： Shuo Huang Wei Shao Mei-ling Wang Dao-Qiang Zhang College of Computer Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China MIIT Key Laboratory of Pattern Analysis and Machine Intelligence Nanjing 211106China

One of the most significant challenges in the neuroscience community is to understand how the human brain *** progress in neuroimaging techniques have validated that it is possible to decode a person′s thoughts,memories,and emotions via functional magnetic resonance imaging(i.e.,fMRI)since it can measure the neural activation of human brains with satisfied spatiotemporal ***,the unprecedented scale and complexity of the fMRI data have presented critical computational bottlenecks requiring new scientific analytic *** the increasingly important role of machine learning in neuroscience,a great many machine learning algorithms are presented to analyze brain activities from the fMRI *** this paper,we mainly provide a comprehensive and up-to-date review of machine learning methods for analyzing neural activities with the following three aspects,i.e.,brain image functional alignment,brain activity pattern analysis,and visual stimuli *** addition,online resources and open research problems on brain pattern analysis are also provided for the convenience of future research.

关键词： Functional magnetic resonance imaging(fMRI) functional alignment brain activity brain decoding visual stimuli reconstruction

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ZnSnO_3透明导电薄膜:溶胶-凝胶法制备及性能

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无机化学学报 2012年第3期28卷 437-444页

作者：季伶俐贺蕴秋李乐同济大学材料科学与工程学院上海200092 同济大学先进土木工程材料教育部重点实验室上海20092

采用溶胶-凝胶（Sol-Gel）过程和旋涂法制备了Zn-Sn-O系统薄膜。通过对干凝胶的热重-差示扫描同步热分析（TG-DSC）,研究了干凝胶在烧结过程中的反应历程。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、场发射扫描电镜（Fe-SeM）以... 详细信息

采用溶胶-凝胶（Sol-Gel）过程和旋涂法制备了Zn-Sn-O系统薄膜。通过对干凝胶的热重-差示扫描同步热分析（TG-DSC）,研究了干凝胶在烧结过程中的反应历程。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、场发射扫描电镜（Fe-SeM）以及紫外-可见透过率（UV-Vis）等表征了烧结后薄膜的晶相、晶格缺陷、微观形貌以及紫外-可见光透过率。本文还研究了烧结温度、N2气氛热处理以及组成变化对薄膜电阻率的影响,结果表明：偏锡酸锌ZnSnO3晶体薄膜具有较低的电阻率;当nZn/（nZn＋nSn）=50.3at%时,薄膜的电阻率达极小值,约为8.0×102Ω.cm。偏锡酸锌ZnSnO3晶体的导电机理研究表明：晶格中间隙阳离子含量的增加有利于薄膜电阻率的降低,而氧空位的形成则使其电阻率升高。薄膜的紫外-可见光透过率（UV-Vis）表明：偏锡酸锌ZnSnO3晶体薄膜在400~900 nm的可见光波段透过率可达80%以上。

关键词： ZnSnO3 薄膜溶胶-凝胶法透明性导电材料

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Bilateral retinal nerve fiber layer thickness reduction in a 9-year-old myopic boy suffering from unilateral optic neuritis:A case report

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World Journal of Clinical Cases 2023年第28期11卷 6806-6811页

作者： Fang-Fang Zhao Shi-Qi Yao Yun Wang Tai-Ping li Jian-Feng Yang Chi-Pui Pang ling-Ping Cen Department of Medical Retina and Neuro-ophthalmology Joint Shantou International Eye Centre of Shantou University and The Chinese University of Hong KongShantou 515041Guangdong ProvinceChina Department of Ophthalmology&Visual Sciences The Chinese University of Hong KongHong Kong 999077China

BACKGROUND In this paper,we present a 9-year-old boy who demonstrates a complex interplay between myopia progression,axial length(AL)extension,and retinal nerve fiber layer(RNFL)thickness loss in both ***,concurrent optic neuritis has directly impacted RNFL thickness in his right eye,and its potential indirect influence on RNFL and macular ganglion cell layer(mGCL)thickness in his left eye is also *** SUMMARY A 9-year-old boy with bilateral myopia presented with diminished vision and pain in his right eye due to optic neuritis,while his left eye showed *** therapy improved his vision in the right eye,and 16-mo follow-up revealed recovery without recurrence despite myopia ***-up optical coherence tomography conducted 16 mo later revealed a notable thinning of the RNFL in both eyes,especially along with a reduction in mGCL thickness in the left *** intricate interaction between optic neuritis,myopia,and retinal changes underscores the need for comprehensive management,highlighting potential long-term visual implications in young *** The progression of myopia and AL extension led to the loss of RNFL thickness in both eyes in a 9-year-old ***,optic neuritis directly affected RNFL thickness in his right eye and may indirectly play a role in the thickness of RNFL and mGCL in his left eye.

关键词： Retinal nerve fiber layer Myopia Optic neuritis Macular ganglion cell Case report

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进阶先修课程:美国衔接中学与中学后教育的策略

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比较教育研究 2015年第1期37卷 47-52,59页

作者：李玲玲厦门大学教育研究院福建厦门361005

20世纪50年代以来,美国推行的"进阶先修课程"是在高中阶段为学生开设大学水平课程的项目,学生选修此类课程并通过统一考试可以获得大学学分,这有助于学习成绩优异者提前过渡到中等后教育阶段并获得学业成功。时至今日,进阶先修课程仍因... 详细信息

20世纪50年代以来,美国推行的"进阶先修课程"是在高中阶段为学生开设大学水平课程的项目,学生选修此类课程并通过统一考试可以获得大学学分,这有助于学习成绩优异者提前过渡到中等后教育阶段并获得学业成功。时至今日,进阶先修课程仍因其课程内容的严谨性与挑战性、考试成绩的普适性与权威性在全球范围内备受优秀学生推崇,是学生挑战自我、获取学分、申请美国名校的有效途径,在衔接美国中学与中学后教育方面发挥着重要作用。

关键词：美国进阶先修课程教育衔接衔接策略

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Walking Status Detection for Pedestrian Navigation

Walking Status Detection for Pedestrian Navigation

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第五届中国卫星导航学术年会

作者： ling Yang Yong li Chris Rizos School of Civil and environmental engineering UNSW

Pedestrian Navigation System（PNS） is useful for emergency responders,security personnel,and wide range augmented reality *** the majority of these pedestrian navigation applications require walking from outdoor to an indoor destination point,the Inertial navigation System（INS） which is self-contained and immune to jamming/interference are preferred to be *** to the sensor properties,a navigation solution of a stand-alone inertial system will drift rapidly,so it relies on external corrections to maintain the system stability and reliability,such as Global Positioning System（GPS）.In addition to seeking for external compensation,taking use of constraints deduced from the particular properties of pedestrian application is also well *** with using external augmentation,these constraints are advantaged of keeping the system *** this paper,the walking status detection based on inertial sensor’s properties is *** constraints are considered to reduce the divergence of the navigation solution caused by the signal errors of accelerometer and *** is position update by step detection and the other is the heading angle constraint based on walking status *** results show that different walking status:static,walking forward,or turning,can be well distinguished by the signal properties during walking.

关键词： pedestrian navigation step detection walking status detection

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Highly active Fe_(36)Co_(44) bimetallic nanoclusters catalysts for hydrolysis of ammonia borane: The first-principles study

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Chinese Chemical Letters 2023年第2期34卷 550-556页

作者： Jinrong Huo Haocong Wei ling Fu Chenxu Zhao Chaozheng He School of Sciences Xi'an Technological UniversityXi'an 710021China Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices School of Materials Science and Chemical EngineeringXi'an Technological UniversityXi'an 710021China Institute of environmental and energy Catalysis School of Materials Science and Chemical EngineeringXi'an Technological UniversityXi'an 710021China College of Resources and environmental engineering Tianshui Normal UniversityTianshui 741001China

In this paper,Fe_(36)Co_(44)nanocluster structure is used to catalyze the hydrolysis reaction of ammonia borane to produce H_(2).Firstly,we complete the construction of Fe_(36)Co_(44)cluster structure and calculate the electronic properties of the *** comparing the adsorption process of Ammonia Borane (AB) in active sites of the cluster,which have different effective Coordination Number (eCN),the qualitative relationship between eCN and the catalytic activation of AB is clarified,and the optimal catalytic active site is ***,from the perspective of different reaction paths,we study the hydrolysis reaction of AB in multiple paths,and obtain 5 different reaction paths and energy *** calculation results show that in the case of N–H bond priority break (path 5),the reaction has the minimum rate-determining step (RDS) barrier (about 1.02 e V) and the entire reaction is exothermic (about 0.40 e V).So,path 5 is an optimal catalytic reaction *** study will have an important guiding significance for the study of the AB hydrolysis reaction mechanism.

关键词： The first-principles NH_(3)BH_(3) Hydrolysis reaction FeCo cluster Catalyst

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Privacy-Preserving Strategyproof Auction Mechanisms for Resource Allocation

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Tsinghua Science and Technology 2017年第2期22卷 119-134页

作者： Yu-e Sun He Huang Xiang-Yang li Yang Du Miaomiao Tian Hongli Xu Mingjun Xiao School of Urban Rail Transportation Soochow University School of Computer Science and Technology Soochow University School of Computer Science and Technology University of Science and Technology of China Suzhou Institute for Advanced Study University of Science and Technology of China School of Computer Science and Technology Anhui University

In recent years, auction theory has been extensively studied and many state-of-the-art solutions have been proposed aiming at allocating scarce resources. However, most of these studies assume that the auctioneer is always trustworthy in the sealed-bid auctions, which is not always true in a more realistic scenario. Besides the privacy-preserving issue, the performance guarantee of social efficiency maximization is also crucial for auction mechanism design. In this paper, we study the auction mechanisms that consider the above two aspects. We discuss two multi-unit auction models： the identical multiple-items auction and the distinct multiple-items *** the problem of determining a multi-unit auction mechanism that can maximize its social efficiency is NPhard, we design a series of nearly optimal multi-unit auction mechanisms for the proposed models. We prove that the proposed auction mechanisms are strategyproof. Moreover, we also prove that the privacy of bid value from each bidder can be preserved in the auction mechanisms. To the best of our knowledge, this is the first work on the strategyproof multi-unit auction mechanisms that simultaneously consider privacy preservation and social efficiency maximization. The extensive simulations show that the proposed mechanisms have low computation and communication overheads.

关键词： approximation mechanism multi-unit auction privacy preserving social efficiency strategyproof

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effects of glucose and its modulation by insulin and estrogen on the proliferation of newborn rat mandibular osteoblasts in vitro

Effects of glucose and its modulation by insulin and estroge...

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第十一次全国口腔修复学学术会议

作者： e ling-ling Wang Dong-sheng liU Hong-chen Stomatologic institute General Hospital of Chinese PLA

Objective:To investigate the effect of glucose and its modulation by insulin(In)and estrogen(e2)on the proliferation of newborn rat mandibular osteoblasts(NRMOBs).Methods:The NRMOBs were cultured in *** effect of different doses of glucose concentration(5.5、16.5 and 49.5mmol/L)with/without insulin(6ug/mL)and/or estrogen(10-9mol/L)on NRMOBs was *** NRMOBs proliferation was examined after 1、3、5、

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