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Quantifying the parameter dependent basin of the unsafe regime of asymmetric Lévy-noise-induced critical transitions

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Applied mathematics and Mechanics(English Edition) 2021年第1期42卷 65-84页

作者： jinzhong ma Yong XU Yongge LI Ruilan TIAN Shao juan ma J.KURTHS School of mathematical Sciences Shanxi UniversityTaiyuan 030000China Department of Applied mathematics Northwestern Polytechnical UniversityXi’an 710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversityXi’an 710072China Department of Engineering Mechanics Shijiazhuang Tiedao UniversityShijiazhuang 050043China School of mathematics&Information Science North Minzu UniversityYinchuan 750021China Potsdam Institute for Climate Impact Research Potsdam 14412Germany Department of Physics Humboldt University at BerlinBerlin 12489Germany

In real systems,the unpredictable jump changes of the random environment can induce the critical transitions(CTs)between two non-adjacent states,which are more *** an asymmetric Lévy-noise-induced tri-stable model with desirable,sub-desirable,and undesirable states as a prototype class of real systems,a prediction of the noise-induced CTs from the desirable state directly to the undesirable one is carried *** first calculate the region that the current state of the given model is absorbed into the undesirable state based on the escape probability,which is named as the absorbed ***,a new concept of the parameter dependent basin of the unsafe regime(PDBUR)under the asymmetric Lévy noise is *** is an efficient tool for approximately quantifying the ranges of the parameters,where the noise-induced CTs from the desirable state directly to the undesirable one may *** importantly,it may provide theoretical guidance for us to adopt some measures to avert a noise-induced catastrophic CT.

关键词： tri-stable model asymmetric Lévy noise critical transition(CT) escape probability absorbed region parameter dependent basin of unsafe regime(PDBUR)

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Slowing down critical transitions via Gaussian white noise and periodic force

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Science China(Technological Sciences) 2019年第12期62卷 2144-2152页

作者： ma jinzhong XU Yong XU Wei LI YongGe KURTHS Jirge Department of Applied mathematics Northwestern Polytechnical UniversityXi'an 710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversiyXi'an 710072China Center for mathematical Sciences&School of mathematics and Statistics Huazhong University of Science and TechmologyWuhan 430074China Potsdam Institute for Climate Impact Research Potsdam 14412Germany Department of Physics Humboldt UniversityBerlin 12489Germany

Stochastic perturbations and periodic excitations are generally regarded as sources to induce critical transitions in complex systems. However, we find that they are also able to slow down an imminent critical transition. To illustrate this phenomenon, a periodically driven bistable eutrophication model with Gaussian white noise is introduced as a prototype class of real *** residence probability(RP) is presented to measure the possibility that the given system stays in the oligotrophic state versus Gaussian white noise and periodic force. Variations in the mean first passage time(MFPT) and the mean velocity(MV) of the first right-crossing process are also calculated respectively. We show that the frequency of the periodic force can increase the MFPT while reduce the MV under different control parameters. Nevertheless, the noise intensity or the amplitude may result in an increase of the RP only in the case of control parameters approaching the critical values. Furthermore, for an impending critical transition, an increase of the RP appears with the interaction between the amplitude and noise intensity or the combination of the noise intensity and frequency, while the interaction of the frequency and amplitude leads to an extension of the MFPT or a decrease of the MV. As a result, an increase of the RP and MFPT, and a decrease of the MVobtained from our results claim that it is possible to slow down an imminent critical transition via Gaussian white noise and periodic force.

关键词： critical transition slowing down bistable eutrophication model Gaussian white noise periodic force residence probability mean first passage time mean velocity

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Bayesian system identification and chaotic prediction from data for stochastic mathieu-van der Pol-Duffing energy harvester

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Theoretical & Applied Mechanics Letters 2023年第2期13卷 89-92页

作者： Di Liu Shen Xu jinzhong ma School of mathematics Sciences Shanxi University030006TaiyuanShanxiChina

In this paper,the approximate Bayesian computation combines the particle swarm optimization and se-quential Monte Carlo methods,which identify the parameters of the mathieu-van der Pol-Duffing chaotic energy harvester *** the proposed method is applied to estimate the coefficients of the chaotic model and the response output paths of the identified coefficients compared with the observed,which verifies the effectiveness of the proposed ***,a partial response sample of the regular and chaotic responses,determined by the maximum Lyapunov exponent,is applied to detect whether chaotic motion occurs in them by a 0-1 *** paper can provide a reference for data-based parameter iden-tification and chaotic prediction of chaotic vibration energy harvester systems.

关键词： Vibration energy harvester Approximate Bayesian computation 0–1 test Parameter identification Chaotic prediction

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Cartilage-targeting peptide-modified dual-drug delivery nanoplatform with NIR laser response for osteoarthritis therapy

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Bioactive materials 2021年第8期6卷 2372-2389页

作者： Song Xue Xiaojun Zhou Weilin Sang Cong Wang Haiming Lu Yiming Xu Yiming Zhong Libo Zhu Chuanglong He jinzhong ma Department of Orthopedics Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China State Key Laboratory for Modification of Chemical Fibers and Polymer materials College of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201620China

Cartilage-targeting delivery of therapeutic agents is still an effective strategy for osteoarthritis(OA)***,scavenging for reactive oxygen species(ROS)and activating autophagy have been increasingly reported to treat OA *** this study,we designed,for the first time,a dual-drug delivery system based on metal organic framework(MOF)-decorated mesoporous polydopamine(MPDA)which composed of rapamycin(Rap)loaded into the mesopores and bilirubin(Br)loaded onto the shell of *** collagen II-targeting peptide(WYRGRL)was then conjugated on the surface of above nanocarrier to develop a cartilage-targeting dual-drug delivery nanoplatform(RB@MPMW).Our results indicated the sequential release of two agents from RB@MPMW could be achieved via near-infrared(NIR)laser ***,the rapid release of Br from the MOF shell exhibited excellent ROS scavenging ability and anti-apoptosis effects,however responsively reduced autophagy activity,to a certain ***,following the NIR irradiation,Rap was rapidly released from MPDA core and further enhanced autophagy activation and chondrocyte ***@MPMW continuously phosphorylated AMPK and further rescued mitochondrial energy metabolism of chondrocytes following IL-1βstimulation via activating SIRT1-PGC-1αsignaling ***,the cartilage-targeting property of peptide-modified nanocarrier could be monitored via magnetic Resonance(MR)and IVIS *** significantly,RB@MPMW effectively delayed cartilage degeneration in ACLT rat ***,our findings indicated that the as-prepared dual-drug delivery nanoplatform exerted potent anti-inflammation and anti-apoptotic effects,rescued energy metabolism of chondrocytes in vitro and prevented cartilage degeneration in vivo,which thereby showed positive performance for OA therapy.

关键词： Osteoarthritis Targeting therapy Autophagy Oxidative stress Energy metabolism

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依托MOOC平台的高校课程联盟运行机制及实施策略

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中国电化教育 2014年第12期 81-84,116页

作者：马金钟延边大学师范学院吉林延吉133000

大规模在线课程(MOOC)是近几年刚刚兴起的网络学习现象。随着国内外MOOC平台的发展、优质资源共享理念的增强,高校课程联盟的呼声和实践也逐渐升温。该文从专业课程教学的视角着力探讨了跨地域跨学校的高校课程联盟的产生与发展、建立... 详细信息

大规模在线课程(MOOC)是近几年刚刚兴起的网络学习现象。随着国内外MOOC平台的发展、优质资源共享理念的增强,高校课程联盟的呼声和实践也逐渐升温。该文从专业课程教学的视角着力探讨了跨地域跨学校的高校课程联盟的产生与发展、建立课程联盟的现实意义,同时也对高校联盟体系进行了结构性设计,提出了高校课程联盟的运行机制及发展策略,即树立开门办学理念,创建课程共建共享合作空间;引进市场机制,不断开拓和完善课程市场;建立课程契约框架,实现义务与权利对接。该文旨在为提高普通高等院校专业课程(非通识类)的教学质量提供发展思路。

关键词： MOOC平台课程联盟课程市场运行机制

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A self-powered solar-blind UV-enhanced Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction photodetector for full spectral photoresponse and imaging

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Nano Research 2024年第4期17卷 2960-2970页

作者： Yajie Han Shujie Jiao Jiangcheng Jing Lei Chen Ping Rong Shuai Ren Dongbo Wang Shiyong Gao jinzhong Wang School of materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Self-powered full-spectrum photodetectors(PDs)offer numerous advantages,such as broad application fields,high precision,efficiency,and multi-functionality,which represent a highly promising and potentially valuable class of detectors for future ***,insensitive response to solar-blind ultraviolet(UV)and complex and expensive preparation processes greatly limit their performance and practical *** this study,a self-powered full-spectrum Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction PD with high sensitivity for solar-blind UV band prepared by a simple and low-cost two-step synthesis method is *** results reveal that the developed PD has an excellent performance,such as high sensitivity from 200 to 850 nm,and a responsivity of 1.38 ma/W as well as a detectivity of 3.22×10^(10) Jones under 254 nm light at zero ***,the unencapsulated device displays exceptional stability and imaging *** is expected that Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si heterojunction PD with a simple and low-cost synthesis method has great potential for self-powered full-spectrum photodetectors.

关键词： Bi_(2)Se_(3)/a-Ga_(2)O_(3)/p-Si self-powered photodetector full spectral photoresponse imaging

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神经生长因子及远侧神经残端诱导神经侧枝生长的研究

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中华骨科杂志 1998年第6期18卷 371-373页

作者：马金忠罗永湘上海市第一人民医院骨科同济医科大学同济医院骨科

目的：研究神经生长因子（ＮＧＦ）及远侧神经残端诱导神经干侧枝的生长。方法：１０只大白兔，于两侧胫神经、腓总神经分叉处切断腓总神经，分叉上１ｃｍ坐骨神经外膜“开窗”，硅胶管桥接“开窗”处和腓总神经远侧断端，中间留６ｍｍ... 详细信息

目的：研究神经生长因子（ＮＧＦ）及远侧神经残端诱导神经干侧枝的生长。方法：１０只大白兔，于两侧胫神经、腓总神经分叉处切断腓总神经，分叉上１ｃｍ坐骨神经外膜“开窗”，硅胶管桥接“开窗”处和腓总神经远侧断端，中间留６ｍｍ间隙。右侧管内注入ＮＧＦ，左侧注入生理盐水（ＮＳ）为对照侧。结果：大体观察ＮＧＦ侧比ＮＳ侧神经侧枝再生快，直径粗。超微结构显示ＮＧＦ侧比ＮＳ侧神经轴突数目多、髓鞘厚、组织排列整齐。电生理检测，ＮＧＦ侧的诱发动作电位峰值（ＡＭＰ）（２．５９００±０．８５６８ｍＶ）、神经传导速度（ＣＶ）（７６．００００±２．３４５７ｍ／ｓ）均优于ＮＳ侧的ＡＭＰ（０．７０８９±０．１２３１ｍＶ）、ＣＶ（２０．００００±１．５８１１ｍ／ｓ），ｔ检验Ｐ均＜０．０１。

关键词：神经再生神经生长因子聚硅酮和神经干侧枝

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图Gt的性质及其应用

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沈阳机电学院学报 1984年第2期 73-79页

作者：马锦忠

本文给出课表任务图Gt与它的数据结构。讨论了它在课表设计中的重要应用,并证明伪编号总数m>n(n为周课时节数),课表不可排性。

关键词：偶对教员个数 Gt 课表编排数据结构定义任务图结点数算法子图定理

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基于CPCI总线Dma方式的实时高速数据交换系统

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强激光与粒子束 2014年第11期26卷 284-288页

作者：李桂花赵五元马进忠汪荣荣中国科学院近代物理研究所兰州730000

针对在重离子同步加速器运行过程中,如何解决设备控制器与上层数据处理程序之间的高速数据交换的问题,自主研发了基于Compact PCI总线板卡,板载FPGA,DSP,SDRAM等资源,并设计了Dma完整控制逻辑,传输协议解译全部由硬件完成(FPGA)。多个... 详细信息

针对在重离子同步加速器运行过程中,如何解决设备控制器与上层数据处理程序之间的高速数据交换的问题,自主研发了基于Compact PCI总线板卡,板载FPGA,DSP,SDRAM等资源,并设计了Dma完整控制逻辑,传输协议解译全部由硬件完成(FPGA)。多个软硬件模块共同实现了该实时高速数据交换系统。该系统经实测,结构完整自洽,数据传输带宽符合重离子同步加速器运行要求,实现了数据传输的实时性。重点描述该系统数据通路上的诸多技术环节,包括硬件和软件的功能划分、FPGA、DSP、驱动程序、上层应用等各环节的技术细节。该实时数据交换系统系原创性设计,系统解决了控制与数据采集系统的设备控制层与上层数据处理层之间的实时数据交换问题。

关键词： Compact PCI Dma 实时数据交换重离子同步加速器 FPGA HPI

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电视摄像技术课程教学方法研究

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中国教育技术装备 2009年第18期 40-41页

作者：马金钟延边大学

电视摄像技术是高等学校教育技术专业及广播电视相关专业开设的专业性很强的课程。本课程侧重技术性，也强调艺术性；侧重理论性，也重视实践性，是一门融技术、艺术于一身的文理渗透的综合性学科。旨在探讨电视摄像技术这门课程的教学... 详细信息

电视摄像技术是高等学校教育技术专业及广播电视相关专业开设的专业性很强的课程。本课程侧重技术性，也强调艺术性；侧重理论性，也重视实践性，是一门融技术、艺术于一身的文理渗透的综合性学科。旨在探讨电视摄像技术这门课程的教学方法，提出摄像技术是教育技术专业学生最基础、最实用的技能之一，培养学生的摄像技术要以实践为基础，以理论为指导，以艺术作品为引导，有计划、有步骤、分阶段进行。

关键词：摄像技术实践艺术

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