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Continuous preparation of strong and tough PVA nanocomposite fibers by mechanical stretching-assisted salting-out treatment

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Nano Research 2024年第4期17卷 3156-3163页

作者： Hang Chen guangze yang Yingzhi Sun Yichao Xu Mingjie Liu Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Research Institute for Frontier Science Beihang UniversityBeijing 100191China International Research Institute for Multidisciplinary Science Beihang UniversityBeijing 100191China

Polymer composite fibers with superior properties such as excellent combined strength and toughness and biocompatibility can be used in high-tech applications of braided protective devices and smart wearable,however the research of high-performance polymer composite fiber remains in the infant *** we present a strategy to produce strong and tough anisotropic polymer nanocomposite fibers with orientedly aligned salt rods using mechanical stretching-assisted salting-out *** prepared nanocomposite fibers have a tensile strength of up to 786±2.7 MPa and an elongation at break of 81%,and the anisotropic fibers exhibit good transmission of mechanical vibration in the longitudinal direction with high *** the fabrication process,the salt builds up into oriented rods during the directional salting process,and the polymer is confined to the 150 nm domain between the rods after the solvent is completely evaporated,giving the nanocomposite fibers superior mechanical *** presented strategy can be applied to the continuous mass production of nanocomposite fibers and is also generalizable to other polymer nanocomposites,which could extend the applicability of nanocomposite fibers to conditions involving more demanding mechanical loading and mechanical vibration transmission.

关键词： poly(vinyl alcohol)(PVA)nanofibers oriented structure ultrastrong and stiff mechanical vibration transmission salting out continuous production

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Nanoemulsions for drug delivery

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Particuology 2022年第5期20卷 85-97页

作者： Russell J.Wilson yang Li guangze yang Chun-Xia Zhao Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt Lucia Queensland 4072Australia

Emulsions are liquid-liquid dispersions with one liquid phase dispersed in the other liquid phase as small *** are nano-sized emulsions with sizes ranging from tens to hundreds of nanometers,and have great potential applications in pharmaceutics,foods and cosmetics due to their attractive properties,such as small sizes,high surface area per unit volume,improved dispersion of active hydrophobic components and enhanced *** article provides an overview of nanoemulsions for drug delivery,starting with an introduction of emulsion types,nanoemulsion preparation and nanoemulsion *** play critical roles in producing and stabilizing *** types of surfactants are summarized including small molecule surfactants,particle surfactants,phospholipids,peptide and protein *** the applications of nanoemulsions as nanomedicine in drug delivery are ***,clinical applications of nanoemulsions are discussed.

关键词： Nanoemulsions Surfactants Drug delivery Nanomedicine Peptide surfactant

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Efficient stochastic parallel gradient descent training for on-chip optical processor

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Opto-Electronic Advances 2024年第4期7卷 5-15页

作者： Yuanjian Wan Xudong Liu guangze Wu Min yang Guofeng Yan Yu Zhang Jian Wang Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Optics Valley Laboratory Wuhan 430074China

In recent years,space-division multiplexing(SDM)technology,which involves transmitting data information on multiple parallel channels for efficient capacity scaling,has been widely used in fiber and free-space optical communication *** enable flexible data management and cope with the mixing between different channels,the integrated reconfig-urable optical processor is used for optical switching and mitigating the channel ***,efficient online train-ing becomes intricate and challenging,particularly when dealing with a significant number of *** we use the stochastic parallel gradient descent(SPGD)algorithm to configure the integrated optical processor,which has less com-putation than the traditional gradient descent(GD)*** design and fabricate a 6×6 on-chip optical processor on silicon platform to implement optical switching and descrambling assisted by the online training with the SPDG ***,we apply the on-chip processor configured by the SPGD algorithm to optical communications for optical switching and efficiently mitigating the channel crosstalk in SDM *** comparison with the traditional GD al-gorithm,it is found that the SPGD algorithm features better performance especially when the scale of matrix is large,which means it has the potential to optimize large-scale optical matrix computation acceleration chips.

关键词： optical communications optical signal processing channel descrambling optical neural network chip silicon photonics

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Effects of tree size and organ age on variations in carbon,nitrogen,and phosphorus stoichiometry in Pinus koraiensis

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Journal of Forestry Research 2024年第3期35卷 155-165页

作者： Yanjun Wang guangze Jin Zhili Liu Center for Ecological Research Northeast Forestry UniversityHarbin 150040People's Republic of China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education Northeast Forestry UniversityHarbin 150040People's Republic of China Northeast Asia Biodiversity Research Center Northeast Forestry UniversityHarbin 150040People's Republic of China

Carbon(C),nitrogen(N),and phosphorus(P)are of fundamental importance for growth and nutrient dynamics within plant organs and deserve more attention at regional to global ***,our knowledge of how these nutrients vary with tree size,organ age,or root order at the individual level remains *** determined C,N,and P contents and their stoichiometric ratios(i.e.,nutrient traits)in needles,branches,and fine roots at different organ ages(0-3-year-old needles and branches)and root orders(1st-4th order roots)from 64 Pinus koraiensis of varying size(Diameter at breast height ranged from 0.3 to 100 cm)in northeast *** factors were also *** results show that nutrient traits were regulated by tree size,organ age,or root order rather than soil *** a whole-plant level,nutrient traits decreased in needles and fine roots but increased in branches with tree *** the organ level,age or root order had a negative effect on C,N,and P and a positive effect on stoichiometric *** results demonstrate that nutrient variations are closely related to organ-specific functions and ecophysiological processes at an individual *** is suggested that the nutrient acquisition strategy by younger trees and organ fractions with higher nutrient content is for ***,nutrient storage strategy in older trees and organ fractions are mainly for steady *** results clarified the nutrient utilization strategies during tree and organ ontogeny and suggest that tree size and organ age or root order should be simultaneously considered to understand the complexities of nutrient variations.

关键词： Tree size Organ age(or root order) Carbon(C) Nitrogen(N) Phosphorus(P) Pinus koraiensis

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Phase separation-induced nanoprecipitation for making polymer nanoparticles with high drug loading Special Collection:Distinguished Australian Researchers

聚集体(英文)

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聚集体(英文) 2023年第2期4卷 137-145页

作者： guangze yang Yun Liu Song Jin Yue Hui Xing Wang Letao Xu Dong Chen David Weitz Chun-Xia Zhao School of Chemical Engineering Faculty of SciencesEngineering and TechnologyThe University of AdelaideAdelaideSouth AustraliaAustralia Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueenslandAustralia Department of Medical Oncology The First Affiliated HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiangChina College of Energy Engineering and State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhouZhejiangChina John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMassachusettsUSA Department of Physics Harvard UniversityCambridgeMassachusettsUSA

Increasing drug loading remains a critical challenge in the development and translation of *** drug-loading nanoparticles have demonstrated unique advantages such as less carrier material used,better-controlled drug release,and improved efficacy and ***,we report a simple and efficient salt concentration screening method for making polymer nanoparticles with exceptionally high drug loading(up to 66.5 wt%)based on phase separation-induced *** addition of salt,phase separation occurs in a miscible solvent-water solution delaying the precipitation time of drugs and polymers to different extents,facilitating their co-precipitation thus the formation of high drug-loading nanoparticles with high encapsulation efficiency(>90%)and excellent stability(>1 month).This technology is versatile and easy to be adapted to various hydrophobic drugs,different polymers,and *** salt-induced nanoprecipitation strategy offers a novel approach to fabricating polymer nanoparticles with tunable drug loading,and opens great potentials for future nanomedicines.

关键词： drug loading liquid-liquid phase separation nanoparticles nanoprecipitation salt

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Development of a concentration-controlled sequential nanoprecipitation for making lipid nanoparticles with high drug loading

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Aggregate 2023年第6期4卷 71-84页

作者： Letao Xu Xing Wang guangze yang Zihan Zhao Yilun Weng yang Li Yun Liu Chun-Xia Zhao Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt.LuciaQueenslandAustralia School of Chemical Engineering Faculty of SciencesEngincering and TechnologyThe University of AdelaideAdelaideSouth AustraliaAustralia

Lipid-based nanostructures have garnered considerable interests over the last two decades,and have achieved tremendous clinical success including theﬁrst clinical approval of a liposome(Doxil)for cancer therapy in 1995 and the recent COVID-19 mRNA lipid nanoparticle *** to liposomes which have a lipid bilayer surrounding an aqueous core,lipid nanoparticles with a particle structure have several attractive advantages for encapsulating poorly water-soluble drugs such as better stability due to the particle structure,high drug encapsulation efﬁciency because of a pre-or co-drug-loading *** many studies have reported the synthesis of lipid nanoparticles for hydrophobic drug encapsulation,the pre-cise control of drug loading and encapsulation efﬁciency remains a signiﬁcant *** work reports a new concentration-controlled nanoprecipitation plat-form technology for fabricating lipid nanoparticles with tunable drug loading up to 70 wt%.This method is applicable for encapsulating a wide range of drugs from very hydrophobic to slightly *** this facile method,nanoparticles with tunable drug loading exhibited excellent properties such as small particle size,narrow size distribution,good particle stability,showing great promise for future drug delivery applications.

关键词： controlled release drug delivery drug loading lipid nanoparticles nanoprecipitation

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Effect of sliding velocity in vacuum on tribological behavior of nitrided 2Cr13 steel

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Rare Metals 2007年第S1期26卷 195-198页

作者： WANG Gang,MA Xinxin,TANG guangze,LIU Yong,yang Dezhuang,and HE Shiyu School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

The effects of sliding velocity on the friction and wear of 2Cr13 pin/2Cr13 nitriding disc in vacuum were *** result show that the friction properties of 2Cr13 nitriding under high sliding velocity(1.6 m·s-1) is better than that under low sliding velocity(0.8 m·s-1).The friction coefficient was 0.4～0.5 when sliding velocity was 1.6 m·*** specimens under vacuum condition are easier to adhere,and the wear under 1.6 m·s-1 is higher than that under 0.8 m·s-1.

关键词： vacuum 2Cr13 nitriding friction

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Criterion of complete chaos synchronization for different three-node VCSEL networks with coupling delays

Criterion of complete chaos synchronization for different th...

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第十七届全国光学测试学术交流会

作者： DONGZHOU ZHONG ZHENZHEN XIAO guangze yang School of Information Engineering Wuyi University

For different three node vertical-cavity surface-emitting laser(VCSEL) networks with nondiffusive and uniform delay coupling,we propose the criterion of the complete chaos synchronization among all node lasers by using the mater-stability function(MSF).Here,the MSF can be obtained by calculating the maximum Lyapunov exponent(MLE) as a function of the constant row sum and the eigenvalue of the outer-coupling matrix from the maser stability equation,which is derived from the dynamical equations of the three-node VCSEL *** is found that the complete chaos synchronization(CCS) can be achieved for an arbitrarily given three-node VCSEL network when two points determined by the row sum and two transversal eigenvalues fall into the region of stability where MLE is negative and the point decided by the row sum,and the eigenvalue associated to perturbations within the synchronization manifold locates in the region of the positive *** on the theoretical criterion and synchronization error theory,we further explore the synchronization properties in the three-node VCSEL network with the ring topology and that with the bus *** a result,the theoretical criterion is in excellent agreement with our numerical results,which indicates that the theoretical criterion is valid and feasible.

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基于相关性和类间差异度的放电声信号特征量选择与降维

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高电压技术 2023年第3期49卷 1194-1204页

作者：马建桥杨广泽曹盘盘包艳艳冯婷娜兰州交通大学自动化与电气工程学院兰州730070 国网甘肃省电力公司电力科学研究院兰州730070 兰州理工大学电气工程与信息工程学院兰州730050 国网新疆电力有限公司哈密供电公司哈密839000

为准确高效地诊断电气设备放电故障类型,实现多维特征的有效降维,提出了基于相关性和类间差异度的特征量选择与降维方法。首先,搭建模拟放电可听声信号采集平台,利用交叉小波变换分析信号的相关主成分,获得信号特征频带及其对应的离散... 详细信息

为准确高效地诊断电气设备放电故障类型,实现多维特征的有效降维,提出了基于相关性和类间差异度的特征量选择与降维方法。首先,搭建模拟放电可听声信号采集平台,利用交叉小波变换分析信号的相关主成分,获得信号特征频带及其对应的离散小波重构时域分量,提取不同类型放电声信号的多维时域特征;然后,利用Pearson相关系数矩阵分析特征量之间的相关性,结合各特征类间差异度和类内离散度,优选出特征量进行识别效果检验;接着,以参数优化的支持向量机识别准确率为维度选择判据,依据准确率变化规律确定最终维度和特征;最后将该文方法与传统降维算法进行对比,并探究不同干扰模式对该文方法的影响。结果表明:所提方法相对传统降维算法保留了原始特征属性,最终所选特征的识别准确率超过96%,为特征降维提供了有效判据。

关键词：局部放电可听声信号交叉小波变换类间差异度特征降维放电类型识别

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社交口碑与中国动画——基于《中国奇谭》的网评内容分析

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当代动画 2023年第3期 75-81页

作者：杨广泽姜申北京师范大学新闻传播学院

社交媒体时代,网络口碑越来越成为评价国产动画传播力的关键因素。本文采用内容分析法,以《中国奇谭》系列动画的社交互动为对象,选取B站、豆瓣、抖音三个平台的1803条评论作为研究样本,构建“评论属性”“评论内容”和“评论口碑”三... 详细信息

社交媒体时代,网络口碑越来越成为评价国产动画传播力的关键因素。本文采用内容分析法,以《中国奇谭》系列动画的社交互动为对象,选取B站、豆瓣、抖音三个平台的1803条评论作为研究样本,构建“评论属性”“评论内容”和“评论口碑”三个层次共十个维度的类目框架。最终透过系统化编码及数据分析,对《中国奇谭》的网络口碑效果予以全面呈现,并比较不同平台口碑态度的差异,以期对未来的动画作品传播与口碑营销提供经验参考。

关键词：《中国奇谭》社交口碑中国动画内容分析

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