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Biomechanics and mechanobiology of the bone matrix

Bone Research 2022年第4期10卷 644-660页

作者： chunyang ma Tianming Du Xufeng Niu Yubo Fan Key Laboratory of Biomechanics and Mechanobiology(Beihang University) Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China Department of Biomedical Engineering Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China Research Institute of Beihang University in Shenzhen Shenzhen 518057China School of Engineering Medicine Beihang UniversityBeijing 100083China

The bone matrix plays an indispensable role in the human body,and its unique biomechanical and mechanobiological properties have received much *** bone matrix has unique mechanical anisotropy and exhibits both strong toughness and high *** mechanical properties are closely associated with human life activities and correspond to the function of bone in the human *** of the mechanical properties exhibited by the bone matrix is independent of its composition and *** on the biomechanics of the bone matrix can provide a reference for the preparation of more applicable bone substitute implants,bone biomimetic materials and scaffolds for bone tissue repair in humans,as well as for biomimetic applications in other *** providing mechanical support to the human body,bone is constantly exposed to mechanical *** the study of the mechanobiology of the bone matrix,the response mechanism of the bone matrix to its surrounding mechanical environment can be elucidated and used for the health maintenance of bone tissue and defect *** paper summarizes the biomechanical properties of the bone matrix and their biological significance,discusses the compositional and structural basis by which the bone matrix is capable of exhibiting these mechanical properties,and studies the effects of mechanical stimuli,especially fluid shear stress,on the components of the bone matrix,cells and their *** problems that occur with regard to the biomechanics and mechanobiology of the bone matrix and the corresponding challenges that may need to be faced in the future are also described.

关键词： structure toughness matrix

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A Novel Time-aware Frame Adjustment Strategy for RFID Anti-collision

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Computers, materials & Continua 2018年第11期57卷 195-204页

作者： Haipeng Chen Kexiong Liu chunyang ma Yu Han Jian Su Department of Electrical Engineering Northeast Electric Power UniversityJilin132012China School of Technology Beijing Forestry UniversityBeijing100083China Department of Electro-Optics and Photonics University of DaytonDaytonOH 45469USA School of Information and Communication Engineering University of Electronic Science and TechnologyChengdu611731China School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China

Recently,object identification with radio frequency identification(RFID)technology is becoming increasingly *** time is a key performance metric to evaluate the RFID *** present paper analyzes the deficiencies of the state-of-the-arts algorithms and proposes a novel sub-frame-based algorithm with adaptive frame breaking policy to lower the tag identification time for EPC global C1 Gen2 UHF RFID *** the observation of slot statistics in a sub-frame,the reader estimates the tag quantity and efficiently calculates an optimal frame size to fit the unread *** when the expected average identification time in the calculated frame size is less than that in the previous frame size,the reader starts the new ***,the estimation of the proposed algorithm is implemented by the look-up tables,which allows dramatically reduction in the computational *** results show noticeable throughput and time efficiency improvements of the proposed solution over the existing approaches.

关键词： Radio frequency identification anti-collision alpha time efficiency

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Short-pulsed Raman fiber laser and its dynamics

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Science China(Physics,Mechanics & Astronomy) 2021年第1期64卷 12-32页

作者： Jun Liu Jiadong Wu Hualong Chen Yu Chen Zhenhong Wang chunyang ma Han Zhang International Collaborative Laboratory of 2D materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen518060China China Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices School of Physics and ElectronicsHunan UniversityChangsha410082China

We provide a perspective review over the recent development of short-pulsed Raman fiber lasers(RFLs),which can provide laser emissions with flexible wavelengths for a variety of applications as well as an excellent platform to investigate various nonlinear pulse dynamics behaviors that cannot be captured in conventional rare-earth(RE)doped *** pulse generation techniques have been explored in ***,the output pulse performance in terms of the pulse energy,duration and stability from short-pulsed RFLs is still inferior to their RE-doped counterparts despite significant advances made over the past few ***,more efforts are required to improve these *** this review,we present a detailed overview of the short-pulsed RFLs based on different mechanisms from the principle to the experiment,including the Q-switching,gainswitching,mode-locking,synchronous pumping and other innovative *** addition,Raman-induced pulse dynamics in ultrafast RFLs and RE-doped mode-locked fiber lasers(MLFLs)are briefly ***,a perspective outlook for the future ultrafast RFLs is provided based on their potential applications in industrial and scientific research areas.

关键词： Raman fiber laser mode-locking Q-switching Raman pulse dynamics

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General Expressions for the Circular Constant π

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Applied mathematics 2021年第1期12卷 18-23页

作者： chunyang ma School of Mechanical and Electrical Engineering Nanchang University Nanchang China

From ancient times to the present, mathematicians have put forward many series expressions of the circular constant. Because of the importance of the circular constant to mathematical physics, the research on circular constant has never stopped. In this paper, the general function expression of the circular constant was given by studying the transient heat conduction equation. From the physical aspect of the derivation process of the circular constant expression, we can conclude that there is an infinite number of different series exist that can be used to express π.

关键词： Circular Constant Infinite Series Pi

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Pure-high-even-order dispersion bound solitons complexes in ultra-fast fiber lasers

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Light(Science & Applications) 2024年第5期13卷 957-972页

作者： Ying Han Bo Gao Honglin Wen chunyang ma Jiayu Huo Yingying Li Luyao Zhou Qi Li Ge Wu Lie Liu College of Communication Engineering Jilin UniversityChangchun 130012China. Research Center of Circuits and Systems Peng Cheng LaboratoryShenzhen 518055China. International Collaborative Laboratory of 2D materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China. College of Electronic Science and Engineering Jilin UniversityChangchun 130012China

Temporal solitons have been the focus of much research due to their fascinating physical *** solitons can form bound states,which are fundamentally crucial modes in fiber laser and present striking analogies with their matter molecules counterparts,which means they have potential applications in large-capacity transmission and alloptical information *** traditionally,second-order dispersion has been the dominant dispersion for conventional solitons,recent experimental and theoretical research has shown that pure-high-even-order dispersion(PHEOD)solitons with energy-width scaling can arise from the interaction of arbitrary negative-even-order dispersion and Kerr *** these advancements,research on the bound states of PHEOD solitons is currently *** this study,we obtained PHEOD bound solitons in a fiber laser using an intra-cavity spectral pulse shaper for high-order dispersion ***,we experimentally demonstrate the existence of PHEOD solitons and PHEOD bound solitons with pure-quartic,-sextic,-octic,and-decic *** simulations corroborate these experimental ***,vibrating phase PHEOD bound soliton pairs,sliding phase PHEOD bound soliton pairs,and hybrid phase PHEOD bound tri-soliton are discovered and *** results broaden the fundamental understanding of solitons and show the universality of multi-soliton patterns.

关键词： dispersion solitons soliton

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Composite double-layer microneedle loaded with traditional Chinese medicine for the treatment of androgenic alopecia

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Medicine in Novel Technology and Devices 2023年第2期18卷 65-73页

作者： Ruoxi Wang Jiangge Wang Haiqiang Gao Xiangyi Liao chunyang ma Xufeng Niu Key Laboratory of Biomechanics and Mechanobiology(Beihang University) Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China

Androgenetic alopecia(AGA)is an androgen-mediated alopecia affected by both genes and *** is a relatively common *** a new drug delivery method,microneedles(MNs)can effectively break through the stratum corneum barrier,deliver drugs more efficiently,and achieve better therapeutic *** this study,we develop a composite double-layer MN through multi-step casting fabrication using a polydimethylsiloxane *** needle tip was fabricated by mixed solution of chitosan and polyvinylpyrrolidone which was loaded with Polygonum multiflorum extract,and the base layer was prepared by mixed solution of polyvinyl alcohol and *** vitro mechanical tests showed that the maximum load of a single tip of the drug-loaded MN was about 3.5 N,which met the mechanical requirements of skin puncture(>1 N).The drug release experiment showed that the MN could achieve gradual drug *** the animal experiment,pigmentation and hair regrowth occurred earlier in the Polygonum multiflorum-MN(Pm-MN)group than in the other groups,and hair growth finally appeared in almost the entire *** with the AGA model mice,mice in the Pm-MN group achieved an increase in the number and diameter of hair *** conclusion,the Pm-MN is scientific and feasible for treating AGA.

关键词： Androgenetic alopecia Microneedles Hair regeneration Traditional Chinese medicine

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Ultrabroadband,few-cycle pulses directly from a mamyshev fiber oscillator

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Photonics Research 2020年第1期8卷 65-69页

作者： chunyang ma ANKITA KHANOLKAR YIMIN ZANG ANDY CHONG Department of Electronic Science and Engineering Jilin UniversityChangchun 130012China Department of Physics University of DaytonDaytonOhio 45469USA Department of Electro-Optics and Photonics University of DaytonDaytonOhio 45469USA

While the performance of mode-locked fiber lasers has been improved significantly,the limited gain bandwidth restricts them from generating ultrashort pulses approaching a few cycles or even *** we present a novel method to achieve few-cycle pulses(~5 cycles)with an ultrabroad spectrum(~400 nm at-20 dB)from a mamyshev oscillator configuration by inserting a highly nonlinear photonic crystal fiber and a dispersion delay line into the cavity.A dramatic intracavity spectral broadening can be stabilized by the unique nonlinear processes of a self-similar evolution as a nonlinear attractor in the gain fiber and a"perfect"saturable absorber action of the mamyshev *** the best of our knowledge,this is the shortest pulse width and broadest spectrum directly generated from a fiber laser.

关键词： fiber oscillator cycle

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Two-Dimensional Tellurium:Progress,Challenges,and Prospects

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Nano-Micro Letters 2020年第8期12卷 82-115页

作者： Zhe Shi Rui Cao Karim Khan Ayesha Khan Tareen Xiaosong Liu Weiyuan Liang Ye Zhang chunyang ma Zhinan Guo Xiaoling Luo Han Zhang Institute of Microscale Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen UniversityShenzhen 518060GuangdongPeople’s Republic of China Department of Ophthalmology Shenzhen People’s HospitalSecond Clinical Medical College of Jinan UniversityFirst Affiliated Hospital of Southern University of Science and TechnologyShenzhen 518020GuangdongPeople’s Republic of China School of Electrical Engineering and Intelligentization Dongguan University of TechnologyDongguan 523808GuangdongPeople’s Republic of China

Since the successful fabrication of two-dimensional(2D)tellurium(Te)in 2017,its fascinating properties including a thickness dependence bandgap,environmental stability,piezoelectric effect,high carrier mobility,and photoresponse among others show great potential for various *** include photodetectors,field-effect transistors,piezoelectric devices,modulators,and energy harvesting ***,as a new member of the 2D material family,much less known is about 2D Te compared to other 2D *** by this lack of knowledge,we review the recent progress of research into 2D Te ***,we introduce the background and motivation of this ***,the crystal structures and synthesis methods are presented,followed by an introduction to their physical properties and ***,the challenges and further development directions are *** believe that milestone investigations of 2D Te nanoflakes will emerge soon,which will bring about great industrial revelations in 2D materials-based nanodevice commercialization.

关键词： 2D materials Tellurium Photodetectors Solar cells Energy harvesting Logic gate and circuits

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Spatio-spectral dynamics of soliton pulsation with breathing behavior in the anomalous dispersion fiber laser

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Chinese Physics B 2022年第7期31卷 336-342页

作者： Ying Han Bo Gao Jiayu Huo chunyang ma Ge Wu Yingying Li Bingkun Chen Yubin Guo Lie Liu College of Communication Engineering Jilin UniversityChangchun 130012China Collaborative Innovation Center for Optoelectronic Science&Technology Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of Electronic Science and Engineering Jilin UniversityChangchun 130012China

We have numerically and experimentally observed the soliton pulsation with obvious breathing behavior in the anomalous fiber laser mode-locked by a nonlinear polarization rotation *** numerical study of the soliton pulsation with breathing behavior was analyzed through the split-step Fourier method at first,and it was found that the phase difference caused by the polarization controller would affect the breathing ***,taking advantage of the dispersive Fourier transform technique,we confirmed the breathing characteristic of soliton pulsation in the same fiber laser as the simulation model *** results complement the research on the breathing characteristic of soliton pulsation.

关键词： soliton pulsation dispersive Fourier transform numerical simulation breathing behavior

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Numerical study of a bi-directional in-band pumped dysprosium-doped fluoride fiber laser at 3.2μm

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Frontiers of Information Technology & Electronic Engineering 2024年第7期25卷 1017-1024页

作者： Lingjing LI chunyang ma Nian ZHAO Jie PENG Bin LIU Haining JI Yuchen WANG Pinghua TANG School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Research Center of Circuits and Systems Peng Cheng LaboratoryShenzhen 518055China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201899China

Dy^(3+)-doped fluoride fiber lasers have important applications in environment monitoring,real-time sensing,and polymer *** present,achieving a high-efficiency and high-power Dy^(3+)-doped fluoride fiber laser in the mid-infrared(mid-IR)region over 3μm is a scientific and technological ***,Dy^(3+)-doped fluoride fiber lasers use a unidirectional pumping method,which suffers from the drawback of high thermal loading density on the fiber tips,thus limiting power *** this study,a bi-directional in-band pumping scheme,to address the limitations of output power scaling and to enhance the efficiency of the Dy^(3+)-doped fluoride fiber laser at 3.2μm,is investigated numerically based on rate equations and propagation *** simulation results reveal that the optical‒optical efficiency of the bi-directional in-band pumped Dy^(3+)-doped fluoride fiber laser can reach 75.1%,approaching the Stokes limit of 87.3%.The potential for further improvement of the efficiency of the Dy^(3+)-doped fluoride fiber laser is also *** bi-directional pumping scheme offers the intrinsic advantage of mitigating the thermal load on the fiber tips,unlike unidirectional pumping,in addition to its high *** a result,it is expected to significantly scale the power output of Dy^(3+)-doped fluoride fiber lasers in the mid-IR regime.

关键词： Mid-infrared laser Fiber laser Bi-directional pumping

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