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Aerosol deposition technology and its applications in batteries

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Nano Materials Science 2024年第1期6卷 24-37页

作者： Xinyu Wang Ramon Alberto Paredes Camacho Xiaoyu Xu Yumei Wang Yi Qiang Hans Kungl Ruediger-AEichel yunfeng zhang Li Lu National University of Singapore(Chongqing)Research Institute Chongqing401123PR China National University of Singapore Singapore117576 Fundamental Electrochemistry(IEK-9) Institute of Energy and Climate ResearchForschungszentrum Jülich52425JülichGermany

Aerosol deposition(AD)method is a kind of additive manufacturing technology for fabricating dense films such as metals and ceramics at room temperature.It resolves the challenge of integrating ceramic films onto temperaturesensitive substrates,including metals,glasses,and polymers.It should be emphasized that the AD is a spray coating technology that uses powder without thermal assistance to generate films with high density.Compared to the traditional sputter-based approach,the AD shows several advantages in efficiency,convenience,better interfacial bonding and so on.Therefore,it opens some possibilities to the field of batteries,especially all-solidstate batteries(ASSBs)and draws much attention not only for research but also for large scale applications.The purpose of this work is to provide a critical review on the science and technology of AD as well as its applications in the field of batteries.The process,mechanism and effective parameters of AD,and recent developments in AD applications in the field of batteries will be systematically reviewed so that a trend for AD will be finally provided.

关键词： Aerosol deposition Room temperature impact consolidation Ceramic film All-solid-state battery Spray coating technology

Critical Nodes Identification: A Non-Cooperative Method for Unknown Topology Information in Ad Hoc Networks

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China Communications 2023年第7期20卷 217-232页

作者： Wenwei Yue Peiang Zuo Wengang Li Yao zhang yunfeng zhang Changle Li Jun Huang State Key Laboratory of Integrated Services Networks Xidian UniversityXi’anShaanxi 710071China Research Institute of Smart Transportation Xidian UniversityXi’anShaanxi 710071China National University of Defense Technology HefeiAnhui 410073China

The foundation of ad hoc networks lies in the guarantee of continuous connectivity.However,critical nodes,whose failure can easily destroy network connectivity,will influence the ad hoc network connectivity significantly.To protect the network efficiently,critical nodes should be identified accurately and rapidly.Unlike existing critical node identification methods for unknown topology that identify critical nodes according to historical information,this paper develops a critical node identification method to relax the prior topology information condition about critical nodes.Specifically,we first deduce a theorem about the minimum communication range for a node through the number of nodes and deployment ranges,and prove the universality of the theorem in a realistic two-dimensional scenario.After that,we analyze the relationship between communication range and degree value for each node and prove that the greater number of nodes within the communication range of a node,the greater degree value of nodes with high probability.Moreover,we develop a novel strategy to improve the accuracy of critical node identification without topology information.Finally,simulation results indicate the proposed strategy can achieve high accuracy and low redundancy while ensuring low time consumption in the scenarios with unknown topology information in ad hoc networks.

关键词： Ad hoc networks node location informa-tion ID generation strategy communication range critical nodes

Zebrafish Foxc1a controls ventricular chamber maturation by directly regulating wwtr1 and nkx2.5 expression

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Journal of Genetics and Genomics 2022年第6期49卷 559-568页

作者： Luqingqing He Qinxin zhang Dongya Jiang yunfeng zhang Yuxuan Wei Yuxi Yang Nan Li Shuang Wang Yunyun Yue Qingshun Zhao Model Animal Research Center Medical SchoolNanjing UniversityNanjingJiangsu 210061China Department of Prenatal Diagnosis Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical UniversityNanjing Maternity and Child Health Care HospitalNanjingJiangsu 210004China School of Traditional Chinese Pharmacy China Pharmaceutical UniversityNanjingJiangsu 210009China

Chamber maturation is a significant process in cardiac development. Disorders of this crucial process lead to a range of congenital heart defects. Foxc1a is a critical transcription factor reported to regulate the specification of cardiac progenitor cells. However, little is known about the role of Foxc1a in modulating chamber maturation. Previously, we reported that foxc1a-null zebrafish embryos exhibit disrupted heart structures and functions. In this study, we observe that ventricle structure and cardiomyocyte proliferation are abolished during chamber maturation in foxc1a-null zebrafish embryos. To observe the endogenous localization of Foxc1a in the hearts of living embryos, we insert eyfp at the foxc1a genomic locus using TALEN. Analysis of the knockin zebrafish show that foxc1a is widely expressed in ventricular cardiomyocytes during chamber development. Cardiac RNA sequencing analysis reveals the downregulated expression of the Hippo signaling effector wwtr1. Dual-luciferase and chromatin immunoprecipitation assays reveal that Foxc1a can bind directly to three sites in the wwtr1 promoter region. Furthermore, wwtr1m RNA overexpression is sufficient to reverse the ventricle defects during chamber maturation. Conditional overexpression of nkx2.5 also partially rescues the ventricular defects during chamber development. These findings demonstrate that wwtr1 and nkx2.5 are direct targets of Foxc1a during ventricular chamber maturation.

关键词： Zebrafish Foxc1a Cardiac ventricular development wwtr1 nkx2.5

Marketing Model Analysis of Fashion Communication Based on the Visual Analysis of Neutrosophic Systems

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Intelligent Automation & Soft Computing 2023年第8期37卷 1257-1274页

作者： Fangyu Ye Xiaoshu Xu yunfeng zhang Yan Ye Jingyu Dai School of Design East China Normal UniversityShanghai200063China School of Foreign Studies Wenzhou UniversityWenzhouZhejiang325000China Centre for Portuguese Studies Macao Polytechnic University999078Macao Graduate School of Education Stamford International University of Thailand999003Thailand College of Art Design and Media Sanda UniversityShanghai201209China

In order to Improvement the Neutrosophic sets as effective tools to deal with uncertain and inconsistent information.The research takes method-ology of combined single-valued neutrosophic rough set and multi-scale deci-sion systems.This paper proposes the optimal scale selection and reduction algorithms based on multi-scale single-valued neutrosophic dominance rough set model.User requirements were analyzed using KJ method to construct a hierarchical model.According to the statistics of representative studies from China and the West,we found that,on the one hand,classical theory has been expanded and supplemented in fashion culture communication and market-ing.The topics are more micro-diverse,and the research methods are inspired by other disciplines;on the other hand,Chinese practice and Chinese cultural perspective need to fill the gap.The fashion content in the new fashion,however,needs to broaden its boundaries,and in addition to integrating with cultural theory and sociology,it needs to be integrated with fashion products,including product design,visual communication,image design and so on.Aesthetic communication needs to be taken into account as an important connotation,with visual communication and the communication of images as important research elements.On the whole,this research abroad inspires the development of domestic fashion culture communication and marketing research.

关键词： Interval valued neutrosophic AHP fashion culture fashion marketing model construction

Hearing characteristics of cephalopods: Modeling and environmental impact study

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Integrative Zoology 2015年第1期10卷 141-151页

作者： yunfeng zhang Feng SHI Jiakun SONG Xugang zhang Shiliang YU Department of Civil and Environmental Engineering University of MarylandCollege ParkMarylandUSA Institute for Marine Biosystem and Neurosciences Shanghai Ocean UniversityShanghaiChina

Cephalopods(octopus,squid and cuttlefish)are some of the most intriguing molluscs,and they represent economically important commercial marine species for fisheries.Previous studies have shown that cephalopods are sensitive to underwater particle motion,especially at low frequencies in the order of 10 Hz.The present paper deals with quantitative modeling of the statocyst system in three cephalopod species:Octopus vulgaris,Sepia officinalis and Loligo vulgaris.The octopus’s macula/statolith organ was modeled as a 2nd-order dynamic oscillator using parameter values estimated from scanning electron micrograph images.The modeling results agree reasonably well with experimental data(acceleration threshold)in the three cephalopod species.Insights made from quantitative modeling and simulating the particle motion sensing mechanism of cephalopods elucidated their underwater particle motion detection capabilities.Sensitivity to emerging environmental issues,such as low frequency noise caused by near-shore wind farms and increasing levels of carbon dioxide in the ocean,and sensitivity to sounds produced by impending landslides were investigated in octopus using the model.

关键词： cephalopod hearing threshold octopus particle motion

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低覆盖草地叶面积指数遥感估算方法

草业科学 2024年第3期41卷 588-598页

作者：张云峰任鸿瑞太原理工大学测绘科学与技术系山西太原030024

有效估算低覆盖草地叶面积指数(LAI),对监测低覆盖草地生长状况、优化完善草地管理具有重要意义。以往针对草地叶面积指数的研究大多集中于中高覆盖度草地,对低覆盖草地的研究相对较少。利用谷歌地球引擎(GEE),基于Landsat-8卫星数据提... 详细信息

有效估算低覆盖草地叶面积指数(LAI),对监测低覆盖草地生长状况、优化完善草地管理具有重要意义。以往针对草地叶面积指数的研究大多集中于中高覆盖度草地,对低覆盖草地的研究相对较少。利用谷歌地球引擎(GEE),基于Landsat-8卫星数据提取所需特征变量,通过特征变量与叶面积指数的相关性及其在模型中的重要性进行特征优选,确定模型最佳变量个数,以此构建机器学习模型,探寻适合在低覆盖区草地估算叶面积指数的方法。结果显示,基于相关性特征优选的梯度提升回归树模型(r-GBRT)在低覆盖草地估算叶面积指数的效果较好,测试集的R 2为0.686,均方根误差(RMSE)为0.101。结果表明,基于特征优选构建的机器学习模型在低覆盖条件下估算草地叶面积指数方面具有较好的应用价值。

关键词：叶面积指数低覆盖草地机器学习特征优选随机森林梯度提升回归树遥感

Seismic analysis of diagrid structural frames with shear-link fuse devices

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Earthquake Engineering and Engineering Vibration 2013年第3期12卷 463-472页

作者： Nasim S. Moghaddasi B. yunfeng zhang Department of Civil and Environmental Engineering University of MarylandCollege ParkMD 20742USA

This paper presents a new concept for enhancing the seismic ductility and damping capacity of diagrid structural frames by using shear-link fuse devices and its seismic performance is assessed through nonlinear static and dynamic analysis. The architectural elegancy of the diagrid structure attributed to its triangular leaning member configuration and high structural redundancy make this system a desirable choice for tall building design. However, forming a stable energy dissipation mechanism in diagrid framing remains to be investigated to expand its use in regions with high seismicity. To address this issue, a diagrid framing design is proposed here which provides a competitive design option in highly seismic regions through its increased ductility and improved energy dissipation capacity provided by replaceable shear links interconnecting the diagonal members at their ends.The structural characteristics and seismic behavior （capacity, stiffness, energy dissipation, ductility） of the diagrid structural frame are demonstrated with a 21-story building diagrid frame subjected to nonlinear static and dynamic analysis. The findings from the nonfinear time history analysis verify that satisfactory seismic performance can be achieved by the proposed diagrid frame subjected to design basis earthquakes in California. In particular, one appealing feature of the proposed diagrid building is its reduced residual displacement after strong earthquakes.

关键词： diagrid structure nonlinear analysis seismic behavior shear link steel structure

Kernel-blending connection approximated by a neural network for image classification

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Computational Visual Media 2020年第4期6卷 467-476页

作者： Xinxin Liu yunfeng zhang Fangxun Bao Kai Shao Ziyi Sun Caiming zhang Shandong University of Finance and Economics Jinan 250014China Shandong University Jinan 250100China

This paper proposes a kernel-blending connection approximated by a neural network(KBNN)for image classification.A kernel mapping connection structure,guaranteed by the function approximation theorem,is devised to blend feature extraction and feature classification through neural network learning.First,a feature extractor learns features from the raw images.Next,an automatically constructed kernel mapping connection maps the feature vectors into a feature space.Finally,a linear classifier is used as an output layer of the neural network to provide classification results.Furthermore,a novel loss function involving a cross-entropy loss and a hinge loss is proposed to improve the generalizability of the neural network.Experimental results on three well-known image datasets illustrate that the proposed method has good classification accuracy and generalizability.

关键词： image classification blending neural network function approximation kernel mapping connection generalizability

Side Effects of Gamifying Environmental Education Activities in Chinese Kindergartens

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教育技术与创新 2023年第4期5卷 71-86页

作者： Huanhuan zhang Wanping Bao Xiaoshu Xu yunfeng zhang Faculty of Applied Sciences Macao Polytechnic UniversityChina School of Education Qinghai Normal UniversityChina School of Foreign Studies Wenzhou UniversityChina Centre for Portuguese Studies Macao Polytechnic UniversityChina

Environmental education is an effective approach to addressing environmental issues,and incorporating environmental education into kindergarten through gamified activities aligns with the concept of gamifying teaching and provides the optimal pathway for implementing environmental education.The purpose of this study is to investigate the specific processes involved in determining the objectives,themes,and content of gamified environmental education activities,as well as the organization,implementation,and evaluation of these activities in kindergarten settings.Five classes from Class G in Xining City Kindergarten were selected as the observational subjects for this study.Interviews were conducted with the teaching staff and the head of the kindergarten.The data obtained from observations and interviews served as the primary data for this research.The results indicate that the activity objectives formulated by teachers lack scientific basis and operability,with limited incorporation of gaming elements.The activity themes and content are narrow in scope and primarily determined by teachers and kindergarten administrators.The organization and implementation of activities often neglect the playful experiences of children,and activity evaluation is not given sufficient attention.

关键词： Kindergarten Environmental education activities Gamification Side effect China