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Nano Materials Science 2022年第2期4卷 169-177页

作者： Tianqi Liang Jie Liu Zhaoyang Wei dean shi Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan430062PR China

In this study,CuO nanoparticles are pre-modified with styrene-maleic anhydride copolymers(SMAs)of different molecular weights and MAH contents.Then the pre-modified CuO nanoparticles(CuO-SMAs)are added to the PA6/SEBS(Styrene Ethylene Butylene Styrene copolymer)(40/60 wt/wt)polymer blends with a co-continuous morphology.When SMA3(MAH=8 wt%,M_(n)=250000 g/mol)is used to modify CuO nanoparticles,and the grafting degree of SMA3 on the surface of CuO reaches 2.74 wt%,90.71%of the added mCuO-SMA3 nanoparticles can be located at the interface of PA6 and SEBS.A porous PA6 membrane with CuO nanoparticles located at the pore walls can be obtained after the SEBS phase is etched with xylene.The catalytic reaction velocity constant(k)for the reduction of p-nitrophenol in NaBH_(4)solutions with the PA6/mCuO-SMA3 porous membrane can reach 1.0040 min^(-1).This work provides a feasible and straightforward method for the preparation of porous polymer membranes with functional nanoparticles located at the wall of the pores.

关键词： Co-continuous CuO nanoparticles Selective distribution Porous PA6 membrane Catalytic performance

The Protocol of Ultrasonic Backscatter Measurements of Musculoskeletal Properties

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Phenomics

Phenomics 2024年第1期4卷 72-80页

作者： Dongsheng Bi Lingwei shi Boyi Li Ying Li Chengcheng Liu Lawrence HLe Jingchun Luo Sijia Wang dean Ta Center for Biomedical Engineering School of InformationScience and TechnologyFudan University2005 SonghuRoadYangpu DistrictShanghai 200438China Academy for Engineering and Technology Fudan UniversityShanghai 200433China Department of Radiology and Diagnostic Imaging University of AlbertaEdmonton T6G2B7Canada Human Phenome Institute Fudan UniversityShanghai 201203China Shanghai Institute of Nutrition and Health Chinese Academyof SciencesShanghai 200031China

This study aims to introduce the protocol for ultrasonic backscatter measurements of musculoskeletal properties based on a novel ultrasonic backscatter bone diagnostic(UBBD)instrument.Dual-energy X-ray absorptiometry(DXA)can be adopted to measure bone mineral density(BMD)in the hip,spine,legs and the whole body.The muscle and fat mass in the legs and the whole body can be also calculated by DXA body composition analysis.Based on the proposed protocol for backscatter measurements by UBBD,ultrasonic backscatter signals can be measured in vivo,deriving three backscatter parameters[apparent integral backscatter(AIB),backscatter signal peak amplitude(BSPA)and the corresponding arrival time(BSPT)].AIB may provide important diagnostic information about bone properties.BSPA and BSPT may be important indicators of muscle and fat properties.The standardized backscatter measurement protocol of the UBBD instrument may have the potential to evaluate musculoskeletal characteristics,providing help for promoting the application of the backscatter technique in the clinical diagnosis of musculoskeletal disorders(MSDs),such as osteoporosis and muscular atrophy.

关键词： Ultrasonic backscatter Musculoskeletal disorders Bone mineral density Muscle mass Fat mass

Construction of all-organic low dielectric polyimide hybrids via synergistic effect between covalent organic framework and cross-linking structure

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Nano Materials Science 2023年第4期5卷 429-438页

作者： Wanjing Zhao Zhaoyang Wei Chonghao Lu Yizhang Tong Jingshu Huang Xianwu Cao dean shi Robert KYLi Wei Wu Key Laboratory of Polymer Processing Engineering of Ministry of Education Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSchool of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou510640China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Green Preparation and Application of Functional MaterialsHubei Key Laboratory of Polymer MaterialsFaculty of Materials Science and EngineeringHubei UniversityWuhan430062China Department of Materials Science and Engineering City University of Hong KongTat Chee AvenueKowloonHong Kong Special Administrative Region of China Jihua Laboratory Foshan528200China

Polyimide(PI)is a promising electronic packaging material,but it remains challenging to obtain an all-organic PI hybrid film with decreased dielectric constant and loss without modifying the monomer.Herein,a series of allorganic PI hybrid films were successfully prepared by introducing the covalent organic framework(COF),which could induce the formation of the cross-linking structure in the PI matrix.Due to the synergistic effects of the COF fillers and the cross-linking structure,the PI/COF hybrid film containing 2 wt%COF exhibited the lowest dielectric constant of 2.72 and the lowest dielectric loss(tanδ)of 0.0077 at 1 MHz.It is attributed to the intrinsic low dielectric constant of COF and a large number of mesopores within the PI.Besides,the cross-linking network of PI prevents the molecular chains from stacking and improves the fraction of free volume(FFV).The molecular dynamics simulation results are well consistent with the dielectric properties data.Furthermore,the PI/COF hybrid film with 5 wt%COF showed a significant enhancement in breakdown strength,which increased to 412.8 kV/mm as compared with pure PI.In addition,the PI/COF hybrid film achieve to reduce the dielectric constant and thermal expansion coefficient(CTE).It also exhibited excellent thermal,hydrophobicity,and mechanical performance.The all-organic PI/COF hybrid films have great commercial potential as next-generation electronic packaging materials.

关键词： Polyimide Covalent organic framework All-organic Cross-linking structure Dielectric property Hybrid film

Self-Dual Hadamard Bent Sequences

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Journal of Systems Science & Complexity 2023年第2期36卷 894-908页

作者： shi Minjia LI Yaya CHENG Wei CRNKOVIC dean KROTOV Denis SOLéPatrick Key Laboratory of Intelligent Computing Signal Processing Ministry of EducationSchool of Mathematical SciencesAnhui UniversityHefei 230601China State Key Laboratory of Information Security(Institute of Information Engineering) Chinese Academy of SciencesBeijing 100093China. LTCI Télécom ParisParis91120 PalaiseauFrance Secure-IC S.A.S. 104 Bd du Montparnasse75014 Paris Faculty of Mathematics University of RijekaNovosibirsk 630090Russia Sobolev Institute of Mathematics Novosibirsk 630090Russia Aix Marseille Univ CNRSCentrale MarseilleI2MMarseilleFrance

A new notion of bent sequence related to Hadamard matrices was introduced recently,motivated by a security application(Solé,et al.,2021).The authors study the self-dual class in length at most 196.The authors use three competing methods of generation:Exhaustion,Linear Algebra and Gr?bner bases.Regular Hadamard matrices and Bush-type Hadamard matrices provide many examples.The authors conjecture that if v is an even perfect square,a self-dual bent sequence of length v always exists.The authors introduce the strong automorphism group of Hadamard matrices,which acts on their associated self-dual bent sequences.The authors give an efficient algorithm to compute that group.

关键词： Bent sequences bush-type Hadamard matrices Hadanard matrices PUF functions regular Hadamard matrices

板栗新品种‘珠玉2号’在临沂地区选育技术试验研究

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林业科技 2024年第1期49卷 19-23页

作者：李路文王琳史永波张德安临沂市森林湿地保护中心山东临沂276037 临沂市罗庄区林业发展中心山东罗庄276000

鉴于本地板栗产业良种化水平低,栽培技术落后,管理粗放,商品质量相对差的现状,阐述板栗新品种‘珠玉2号’在临沂地区的选育过程。通过多重比较、分析对比试验,着重从遗传稳定性、早实丰产性、果实商品性状及抗逆性等方面进行筛选评价。... 详细信息

鉴于本地板栗产业良种化水平低,栽培技术落后,管理粗放,商品质量相对差的现状,阐述板栗新品种‘珠玉2号’在临沂地区的选育过程。通过多重比较、分析对比试验,着重从遗传稳定性、早实丰产性、果实商品性状及抗逆性等方面进行筛选评价。研究结果表明,新育良种具备早果、丰产、稳产,坚果个大整齐饱满,色泽光亮,抗逆性强等特点,符合植物新品种特异性、一致性和稳定性。

关键词：板栗新品种珠玉2号选育栽培技术

PREPARATION AND CHARACTERIZATION OF COMPATIBILIZED PP/PA6 BLENDS

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PREPARATION AND CHARACTERIZATION OF COMPATIBILIZED PP/PA6 BL...

车辆前纵梁封板冲压的聚集度自适应粒子群优化

International Symposium on Engineering Plastics EP’2001 Beijing

作者： dean shi Jinghua Yin State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Science

＜正＞In this work,PA6 with extreme low molecular molecular weight and PP-g-MAH were synthesized.And PP/PA6/PP-g-MAH blends with different compositions were prepared by using reactive extrusion method.By analyzing the...

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机械设计与制造 2024年第1期395卷 143-149页

作者：彭莹纪世才郑新山东交通职业学院车辆工程系山东潍坊261206 山东工业技师学院教务处山东潍坊261053

为了提高车辆前纵梁封板的冲压件质量,提出了基于聚集度自适应粒子群算法的冲压工艺优化方法。介绍了前纵梁封板的三维模型、坯料设计结果和冲压成形原理。基于成形极限曲线,以减小冲压件的减薄率、增厚率、回弹量为目标,建立了多目标... 详细信息

为了提高车辆前纵梁封板的冲压件质量,提出了基于聚集度自适应粒子群算法的冲压工艺优化方法。介绍了前纵梁封板的三维模型、坯料设计结果和冲压成形原理。基于成形极限曲线,以减小冲压件的减薄率、增厚率、回弹量为目标,建立了多目标优化模型。使用复合中心实验法设计了5因素5水平的32组实验,基于Autoform软件获得了实验数据。使用BP神经网络拟合了输入输出间的回归关系,并验证了回归模型的精度。在粒子群算法基础上,依据粒子相似度和种群聚集度,将Levy飞行融入到粒子群算法中,提高粒子多样性和算法优化能力,从而并提出了聚集度自适应粒子群算法。将改进粒子群算法应用于多优化模型求解,改进粒子群算法收敛速度早于传统算法,且改进粒子群算法搜索的目标函数值比传统算法减小了3.71%,说明了改进算法的优越性。经验证,优化后的试制件外观合格,减薄率、增厚率及回弹量均满足质量要求,可以进行批量生产。

关键词：前纵梁封板粒子相似度种群聚集度 Levy飞行

中美文化交流的独特符号:丁龙研究的解构与再建构

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华侨华人历史研究 2024年第2期 1-12页

作者：张国雄石坚平五邑大学广东侨乡文化研究院广东江门529020

论文回顾和梳理了120多年来丁龙研究的成果与主体,丁龙研究的学术分期以及丁龙文化符号的再建构。研究显示,1901—2022年,中美有关丁龙研究的文献成果,据不完全统计有126篇(部),成果形式多样。丁龙研究的主体,包括新闻记者、专家学者、... 详细信息

论文回顾和梳理了120多年来丁龙研究的成果与主体,丁龙研究的学术分期以及丁龙文化符号的再建构。研究显示,1901—2022年,中美有关丁龙研究的文献成果,据不完全统计有126篇(部),成果形式多样。丁龙研究的主体,包括新闻记者、专家学者、广播电视工作者和侨务工作者。丁龙研究的学术分期主要分为两个阶段:建构阶段(1901—2000年)和解构阶段(2000年至今)。丁龙的“视野和理想”具有更加丰富的内涵,为再构建提供了更加广阔的空间。一是从美国排华视域研究丁龙;二是从美国早期“中国观”视域研究丁龙;三是从中美文化交流视域研究丁龙。“丁龙汉学讲座教授”的设立,是20世纪初发生在美国纽约的一个历史事件,开美国汉语教学、中国文化研究之先河。如今,“丁龙”已经成为美国汉学史、美国华侨史、中美文化交流史的一个重要的文化象征和标志性文化符号。

关键词：中美文化文化交流华侨史汉语教学丁龙

20世纪后半期以来丁龙故事的文学化建构——丁龙研究之二

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五邑大学学报（社会科学版） 2024年第2期26卷 1-5,92页

作者：石坚平五邑大学广东侨乡文化研究院广东江门529020

20世纪后半期,华人世界中流传着的丁龙(dean Lung)故事逐渐脱离以往卡朋蒂埃人生传奇叙事的束缚,发展出相对独立的丁龙叙事,以突出和强化丁龙作为公益慈善捐赠者的形象。捐赠者、捐赠动机、以丁龙名字来命名的缘由等关键情节被一再地修... 详细信息

20世纪后半期,华人世界中流传着的丁龙(dean Lung)故事逐渐脱离以往卡朋蒂埃人生传奇叙事的束缚,发展出相对独立的丁龙叙事,以突出和强化丁龙作为公益慈善捐赠者的形象。捐赠者、捐赠动机、以丁龙名字来命名的缘由等关键情节被一再地修改、润色和重构,使整个故事变得既生动逼真又合情合理,以增强其文学性、可读性与趣味性,并承载着不同建构者所赋予的特定时代意蕴。与此同时,英文世界在继承原有早期丁龙象形建构成果基础上,也逐渐吸收了华人世界文化建构的成果,进一步深化了丁龙故事的文学化建构。

关键词：丁龙卡朋蒂埃文学建构中美文化

Deep learning method for cell count from transmitted-light microscope

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Journal of Innovative Optical Health Sciences 2023年第5期16卷 115-127页

作者： Mengyang Lu Wei shi Zhengfen Jiang Boyi Li dean Ta Xin Liu Fudan University Academy for Engineering and Technology ShanghaiP.R.China Tianjin Center for Medical Device Evaluation and Inspection Tianjin P.R.China Shanghai University School of Communication&Information Engineering Shanghai P.R.China Fudan University Center for Biomedical Engineering Shanghai P.R.China Fudan University State Key Laboratory of Medical Neurobiology Institutes of Brain Science ShanghaiP.R.China

Automatic cell counting provides an effective tool for medical research and diagnosis.Currently,cell counting can be completed by transmitted-light microscope,however,it requires expert knowledge and the counting accuracy which is unsatisfied for overlapped cells.Further,the image-translation-based detection method has been proposed and the potential has been shown to accomplish cell counting from transmitted-light microscope,automatically and effectively.In this work,a new deep-learning(DL)-based two-stage detection method(cGAN-YOLO)is designed to further enhance the performance of cell counting,which is achieved by combining a DL-based fluorescent image translation model and a DL-based cell detection model.The various results show that cGAN-YOLO can effectively detect and count some different types of cells from the acquired transmitted-light microscope images.Compared with the previously reported YOLO-based one-stage detection method,high recognition accuracy(RA)is achieved by the cGAN-YOLO method,with an improvement of 29.80%.Furthermore,we can also observe that cGAN-YOLO obtains an improvement of 12.11%in RA compared with the previously reported image-translation-based detection method.In a word,cGAN-YOLO makes it possible to implement cell counting directly from the experimental acquired transmitted-light microscopy images with high flexibility and performance,which extends the applicability in clinical research.

关键词： Automatic cell counting transmitted-light microscope deep-learning fluorescent image translation.