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Mainchain conformation ordering self-assembly tailored room temperature phosphorescence emission

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Science China Chemistry 2025年第01期 329-336页

作者： Yuzhu Li Yumeng Gao Feng tian Yu Wang Yuan Yao Shaoliang lin Xiang Ma Binbin Xu Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai Synchrotron Radiation facility Shanghai Advanced Research Institute Chinese Academy of Sciences Key Laboratory for Advance Materials and Feringa Noble Prize Scientist Joint Research Centre Frontiers Science for Materiobiology and Dynamic Chemistry School of Chemistry and Molecular Engineering East China University of Science & Technology

Developing organic room-temperature phosphorescence （RTP） materials with a wide range of tunable-emission is significant in expanding the applications of RTP ***,we rationally designed amphiphilic alternating copolymers poly(1,2-bis（4-alkoxyphenyl）ethane-1,2-dione-alt-（ethylene glycol）x)(P（Bz-alt-EGx）) that combined the advantage of alternating benzil and EGxskeleton,and tunable mainchain *** a mainchain conformation ordering assembly （COA） process,P（Bz-alt-EGx） self-assembled into well-defined platelets,and such assemblies emitted blue RTP at ca.425 nm due to the ordered folded-chain conformation and confined *** contrast,traditional self-assembly （TA） of P（Bz-alt-EGx） obtained less ordered aggregates,such as asymmetric worms,vesicles,and rod-like *** resultant less ordered aggregates exhibited yellow-green RTP at ca.550 *** wide-tuning RTP emission in solution （between blue and yellow-green,over125 nm） is realized using the P（Bz-alt-EGx） alternating copolymers under the treatment of different self-assembly *** study uncovers a new strategy to tailor the RTP emission through different self-assembly pathways and holds great promise for the fabrication of advanced optical materials.

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Advances in the Development of Gradient Scaffolds Made of Nano-Micromaterials for Musculoskeletal Tissue Regeneration

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NANO-MICRO LETTERS 2025年第1期17卷 1-46页

作者： fang, Lei lin, Xiaoqi Xu, Ruian Liu, Lu Zhang, Yu tian, Feng Li, Jiao Jiao Xue, Jiajia Beijing Univ Chem Technol Beijing Lab Biomed Mat Beijing 100029 Peoples R China Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China Univ Technol Sydney Fac Engn & IT Sch Biomed Engn Sydney NSW 2007 Australia

This review highlights the gradient variations in the structural composition of musculoskeletal tissues and comprehensively examines recent progress in the fabrication and application of biomimetic gradient scaffolds for musculoskeletal *** challenges and prospects of gradient scaffolds for clinical application are discussed. The intricate hierarchical structure of musculoskeletal tissues, including bone and interface tissues, necessitates the use of complex scaffold designs and material structures to serve as tissue-engineered substitutes. This has led to growing interest in the development of gradient bone scaffolds with hierarchical structures mimicking the extracellular matrix of native tissues to achieve improved therapeutic outcomes. Building on the anatomical characteristics of bone and interfacial tissues, this review provides a summary of current strategies used to design and fabricate biomimetic gradient scaffolds for repairing musculoskeletal tissues, specifically focusing on methods used to construct compositional and structural gradients within the scaffolds. The latest applications of gradient scaffolds for the regeneration of bone, osteochondral, and tendon-to-bone interfaces are presented. Furthermore, the current progress of testing gradient scaffolds in physiologically relevant animal models of skeletal repair is discussed, as well as the challenges and prospects of moving these scaffolds into clinical application for treating musculoskeletal injuries.

关键词： Gradient scaffolds Musculoskeletal tissues Advanced manufacturing Biomaterials Tissue regeneration

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引信试验数据的小波分析

兵工学报 2005年第6期26卷 838-841页

作者：芮筱亭杨富锋沙南生陆文广田发林陈建新南京理工大学江苏南京210094 国防科学技术工业委员会北京100037 国营9324厂安徽合肥230001

用傅里叶变换对含有噪声干扰的试验数据进行滤波,通常难以确定奇异点在空间的位置及分布情况。本文用小波变换对引信风洞试验数据进行滤波,通过选择合理的基小波、分解尺度和阈值对数据滤波后得到了引信涡轮角加速度的突变点,确定了引... 详细信息

用傅里叶变换对含有噪声干扰的试验数据进行滤波,通常难以确定奇异点在空间的位置及分布情况。本文用小波变换对引信风洞试验数据进行滤波,通过选择合理的基小波、分解尺度和阈值对数据滤波后得到了引信涡轮角加速度的突变点,确定了引信击针脱离盲孔的时间,找出了某型引信早炸原因,解决了实际引信故障分析难题,保证了该引信的设计定型。

关键词：机械学引信试验早炸小波分析滤波

A new model for predicting hydraulic fracture penetration or termination at an orthogonal interface between dissimilar formations

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Petroleum Science 2022年第6期19卷 2810-2829页

作者： Yu Zhao Yong-fa Zhang Guo-Dong tian Chao-lin Wang Jing Bi College of Civil Engineering Guizhou UniversityGuiyang550025GuizhouChina Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety(Guizhou University) Guiyang550025GuizhouChina School of Civil Engineering Chongqing UniversityChongqing400045China

Vertical height growth of hydraulic fractures(HFs)can unexpectedly penetrate a stratigraphic interface and propagate into neighboring layers,thereby resulting in low gas-production efficiency and high risk of groundwater contamination or fault *** of hydraulic fracture behavior at the interface is of pivotal importance for the successful development of layered *** this paper,a twodimensional analytical model was developed to examine HF penetration and termination behavior at an orthogonal interface between two dissimilar *** model involves changes in the stress singularity ahead of the HF tip,which may alter at the formation interface due to material *** critical stress conditions were considered to assess possible fracture behavior(i.e.,crossing,slippage,and opening)at the ***,this model was verified by comparing its theoretical predictions to numerical simulations and three independent *** agreement with the simulation results and experimental data was observed,which shows the validity and reliability of this ***,a parametric study was conducted to investigate the effects of key formation parameters(elastic modulus,Poisson’s ratio,and fracture toughness)between adjacent *** results indicate that the variation in the introduced parameters can limit or promote vertical HF growth by redistributing the induced normal and shear stresses at the *** the three studied parameters,Poisson’s ratio has the least influence on the formation *** the fracture toughness and elastic modulus of the bounding layer are larger than those of the pay zone layer,the influence of fracture toughness will dominate the HF behavior at the interface;otherwise,the HF behavior will more likely be influenced by elastic modulus.

关键词： Analytical model Hydraulic fracture Interface of dissimilar materials Vertical propagation behavior Parametric sensitivity analysis

Experimental study of air-water interface properties in self-aerated flows

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Journal of Hydrodynamics 2019年第5期31卷 940-948页

作者： Wang-ru Wei Wei-lin Xu Jun Deng Zhong tian fa-xing Zhang State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China

The microscopic air-water structures and the interface area properties in the self-aerated flows are important research issues in the high-speed self-aerated *** present experimental study concerns the mean and medium air chord length distributions in the self-aerated chute flows for different flow Reynolds numbers and air concentration *** relationship between the microscopic and the macroscopic aerated properties in the air-water mixture region is *** distribution of the microscopic specific air-water interface area with the macroscopic air concentration variation is self-similar in the self-aerated *** view of the difference of the air-water structure in high and low aerated regions,a new relationship is proposed for predicting the distributions of a specific air-water interface area,and the agreement between the measured and predicted results is satisfactory.

关键词： Air-water interface area self-aeration air chord size chute flow experimental study

Analysis on link Between the Macroscopic and Microscopic Air–Water Properties in Self-Aerated Flows

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China Ocean Engineering 2018年第5期32卷 614-623页

作者： WEI Wang-ru XU Wei-lin DENG Jun tian Zhong ZHANG fa-xing State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan University

Self-aeration in high-speed free surface flows occurs commonly and is of interest to ocean engineering, hydraulic engineering, and environmental engineering. For two-phase air–water flows, macroscopic air–water flow properties develop gradually, accompanied by the change of microscopic air–water structures. In this article, representational experimental studies on macroscopic and microscopic characteristics of self-aerated open-channel flows are summarized and compared. The isolated effect of the flow Reynolds number and air quantity on the differences in air count rate and chord size are analyzed and discussed. The results show that the characterized flow depth y, affected by the turbulence transfer, is a specific criterion to distinguish the interior air–water structure development. Two distinct linear trends of self-aeration are found, depending on the y/yvariation with a breaking point at Cmean =0.50. The air count rate and size scale in self-aerated flows are affected by the air quantity of self-aerated flows, even with identical flow Reynolds numbers. Thus, a specific parameter is proposed to assess the air–water structures and a series of self-similarity relationships in self-aeration properties are obtained. The link between macroscopic and microscopic air–water properties results in significant scale effect on air–water structures in self-aerated flows.

关键词： self-aeration two-phase flows air concentration air bubble open channel

Towards scalable van der Waals heterostructure arrays

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Rare Metals 2020年第4期39卷 327-329页

作者： fa-Kun Wang tian-You Zhai State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Two-dimensional van der Waals heterostructures are mostly created by an arduous micromechanical exfoliation and manual restacking *** a recent report published in Nature,Li and colleagues reported a chemical vapour deposition(CVD)method with controllable nucleation sites for synthesizing van der Waals heterostructure arrays scalably and controllably,which is a necessary step towards practical integrated circuits.

关键词： TMD Towards scalable van der Waals heterostructure arrays

Preparation and electrochemical behaviour of Ti/Mn_(2)O_(3)coating anode

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Rare Metals 2023年第7期42卷 2197-2203页

作者： fa-Ming Xie lin tian Chuan-Bin Li Xue-Tao Yuan Yan-Xi Yin GRINM Resources and Environment Tech.Co. LtdBeijing101047China National Engineering Research Center for Environment-Friendly Metallurgy in Producing Premium Non-Ferrous Metals Beijing101047China China General Research Institute for Nonferrous Metals Beijing100088China Beijing Engineering Research Center of Strategic Nonferrous Metals Green Manufacturing Technology Beijing101047China

Owing to the excellent electrocatalytic activity,corrosion resistance and high cell potential of the dimensionally stable anodes(DSA),DSAs have great application potential in metallurgical electrolysis *** this resear... 详细信息

关键词： coating corrosion resistance

Intermittent Arc fault Detection Based on Machine Learning in Resonant Grounding Distribution Systems

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CSEE Journal of Power and Energy Systems 2023年第2期9卷 599-611页

作者： Ye tian Mou-fa Guo Duan-Yu Chen College of Electrical Engineering and Automation Fuzhou UniversityFuzhou 350108China Department of Electrical Engineering Yuan Ze UniversityTaiwan 32003China Fuzhou Power Supply Company of State Grid Fujian Electric Power Co. Ltd.Fuzhou 350009China

In resonant grounding systems,most single-phaseto-ground faults evolve from IAFs(Intermittent Arc faults).Earlier detection of IAFs can facilitate fault *** work proposes a novel method based on machine learning for detecting IAFs in three ***,the feature of zero-sequence current is automatically extracted and selected by a newlydesigned FINET(“For IAFs,Neuron Elaboration Net”),instead of traditional feature selection based on time-frequency ***,data of the zero-sequence current divided by different time windows are successively input into the trained FINET.A proposed PSF(principal-subordinate factor)analyses the results obtained from FINET to improve anti-interference in the mentioned IAF detection *** using PSCAD/EMTDC software simulation data show the proposed method is feasible and highly *** addition,the detection result of on-site recorded data demonstrates the effectiveness of the proposed method in practical resonant grounding systems.

关键词： Resonant grounding distribution systems intermittent arc faults(IAFs)detection “For IAFs Neuron Elaboration Net”(FINET) principal-subordinate factor(PSF)