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Simulation of the physical process of neural electromagnetic signal generation based on a simple but functional bionic Na^(+)channel

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Chinese Physics B 2022年第6期31卷 741-749页

作者： Fan Wang Jingjing Xu Yanbin Ge Shengyong Xu yanjun fu Caiyu Shi Jianming Xue Institute of Microelectronics Shandong UniversityJinan 250102China Shenzhen Research Institute of Shandong University Shenzhen 518057China Key Laboratory for the Physics&Chemistry of Nanodevices and Department of ElectronicsPeking UniversityBeijing 100871China School of Physics Peking UniversityBeijing 100871China

The physical processes occurring at open Na^(+) channels in neural fibers are essential for the understanding of the nature of neural signals and the mechanism by which the signals are generated and transmitted along ***,there is a less generally accepted description of these physical *** studied changes in the transmembrane ionic flux and the resulting two types of electromagnetic signals by simulating the Na^(+) transport across a bionic nanochannel model simplified from voltage-gated Na^(+) *** results show that the Na^(+) flux can reach a steady state in approximately 10 ns due to the dynamic equilibrium of the Na^(+) ion concentration difference between both sides of the *** characterizing the spectrum and transmission of these two electromagnetic signals,the low-frequency transmembrane electric field is regarded as the physical quantity transmitting in the waveguide-like lipid dielectric layer and triggering the neighboring voltage-gated *** influencing the Na^(+) flux transport are also *** impact of the Na^(+) concentration gradient is found to be higher than that of the initial transmembrane potential on the Na^(+) transport rate,and introducing the surface-negative charge in the upper third channel could increase the transmembrane Na^(+) *** work can be further studied by improving the simulation model;however,the current work helps to better understand the electrical functions of voltage-gated ion channels in neural systems.

关键词： neural signals sodium-ion channel transmembrane current electromagnetic field

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Effect of heat treatment on microstructures and properties of a novel Al-Zn-Mg-Cu alloy for oil drilling

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Progress in Natural Science:Materials International 2019年第2期29卷 217-223页

作者： yanjun fu Xiwu Li Kai Wen Shuhui Huang Yang Dong Mao Rao fubo Yang Yugang Wang Baiqing Xiong Zhihui Li State Key Laboratory of Nonferrous Metals and Processes General Research Institute for Nonferrous Metals Shandong Yankuang Light Alloy Co.Ltd. Southwest Aluminum (Group) Co.Ltd.

In view of the special requirements for strength, heat resistance and corrosion resistance of Al-Zn-Mg-Cu alloy for oil drilling, the Al-6.2 Zn-2.5 Mg-1.6 Cu alloy was prepared by increasing Cu content on basis of Russian Series 1953 alloy. The effect of heat treatment on the microstructures and properties of the alloy was characterized by optical microscope（OM）, scanning electron microscope（SEM） and transmission electron microscope（TEM）, and investigated by tensile test at room temperature, thermal exposure test and corrosion test. The results show that the strength after T6 aging treatment exhibit a decrease trend as an increase of the solution temperature from465 °C to 480 °C. After the solution treated by the rate of 470 °C/1 h, second phases dissolve into the matrix very well and the strength property reaches optimum. The alloy has better comprehensive properties treated by a solution treatment of 470 °C/1 h and then followed by an aging treatment of 120 °C/24 h + 170 °C/1 h + 120 °C/24 h. Under the aging state, the precipitated phases inside the grains are suitable in size, while on the grain boundary distribute discontinuously and the precipitate-free zone is obvious. Besides, the alloy still maintain high tensile properties. The yield strength, tensile strength and elongation are 650 MPa, 686 MPa,12.0%, respectively. The yield strength retention after heat exposure is 92%. The alloy has good corrosion resistance and the exfoliation corrosion degree. The average corrosion rate in the H;S and CO;environment is 0.0024 mm/a, which is far less than the required 0.12 mm/a. It is insensitive to H;S and CO;environments.

关键词： Al-Zn-Mg-Cu alloy Heat treatment Microstructure Mechanical properties Heat resistance Corrosion resistance

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DYNAMIC COHESIVENESS IN A COMMUNICATIVE ENGLISH CLASS

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Chinese Journal of Applied Linguistics 2001年第4期24卷 15-18页

作者： Wang Qiyan fu yanjun Northeast Normal University

One of the main features of a communicative English classis activities, organized by the teacher and conducted by studentsperforming certain functions and involving different topics. Theuse of activities has gained much attention. However, the linkbetween activities seems to have been ignored. This paper is anattempt to explore the role of cohesiveness between activities incommunicative teaching. The cohesiveness can be eithermechanical or dynamic. The key is that dynamic cohesivenesscontributes to the atmosphere and effectiveness of communicativeEnglish classroom teaching.

关键词： DYNAMIC COHESIVENESS IN A COMMUNICATIVE ENGLISH CLASS

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Bidirectional regulation of the brain-gut-microbiota axis following traumatic brain injury

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Neural Regeneration Research 2025年第8期20卷 2153-2168页

作者： Xinyu You Lin Niu Jiafeng fu Shining Ge Jiangwei Shi yanjun Zhang Pengwei Zhuang National Key Laboratory of Chinese Medicine Modernization Tianjin University of Traditional Chinese MedicineTianjinChina Haihe Laboratory of Modern Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjinChina First Teaching Hospital of Tianjin University of Traditional Chinese Medicine TianjinChina National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion TianjinChina

Traumatic brain injury is a prevalent disorder of the central nervous *** addition to primary brain parenchymal damage,the enduring biological consequences of traumatic brain injury pose long-term risks for patients with traumatic brain injury;however,the underlying pathogenesis remains unclear,and effective intervention methods are *** dysfunction is a significant consequence of traumatic brain *** the most densely innervated peripheral tissue in the body,the gut possesses multiple pathways for the establishment of a bidirectional“brain-gut axis”with the central nervous *** gut harbors a vast microbial community,and alterations of the gut niche contribute to the progression of traumatic brain injury and its unfavorable prognosis through neuronal,hormonal,and immune pathways.A comprehensive understanding of microbiota-mediated peripheral neuroimmunomodulation mechanisms is needed to enhance treatment strategies for traumatic brain injury and its associated *** comprehensively reviewed alterations in the gut microecological environment following traumatic brain injury,with a specific focus on the complex biological processes of peripheral nerves,immunity,and microbes triggered by traumatic brain injury,encompassing autonomic dysfunction,neuroendocrine disturbances,peripheral immunosuppression,increased intestinal barrier permeability,compromised responses of sensory nerves to microorganisms,and potential effector nuclei in the central nervous system influenced by gut ***,we reviewed the mechanisms underlying secondary biological injury and the dynamic pathological responses that occur following injury to enhance our current understanding of how peripheral pathways impact the outcome of patients with traumatic brain *** review aimed to propose a conceptual model for future risk assessment of central nervous system-related diseases while elucidating novel insights into the bidirectional effec

关键词： traumatic brain injury brain-gut-microbiome axis gut microbiota neuroimmune immunosuppression host defense vagal afferents bacterial infection dorsal root ganglia nociception neural circuitry

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A semi-classical model for the charge exchange and energy loss of slow highly charged ions in ultrathin materials

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Matter and Radiation at Extremes 2019年第5期4卷 1-6页

作者： Xun Guo yanjun fu Xitong Zhang Xinwei Wang Yan Chen Jianming Xue State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871People’s Republic of China CAPT HEDPS and IFSA Collaborative Innovation Center of MoECollege of EngineeringPeking UniversityBeijing 100871People’s Republic of China School of Advanced Materials Shenzhen Graduate SchoolPeking UniversityShenzhen 518055People’s Republic of China New Energy Research Institute School of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

We present a simple and reliable method,based on the over-barrier model and Lindhard’s formula,to calculate the energy loss,charge transfer,and normalized intensity of highly charged ions penetrating through 2D ultrathin materials,including graphene and carbon *** to our results,the interaction between the ions and the 2D material can be simplified as an equivalent two-body collision,and we find that full consideration of the charge exchange effect is key to understanding the mechanism of ion energy deposition in an ultrathin *** only can this semiclassical model be used to evaluate the ion irradiation effect to a very good level of accuracy,but it also provides important guidance for tailoring the properties of 2D materials using ion beams.

关键词： charge exchange energy

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双频外差结合相位编码的相位解包裹方法

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红外与激光工程 2019年第9期48卷 248-255页

作者：韩旭王霖伏燕军(指导) 南昌航空大学无损检测技术教育部重点实验室江西南昌330063 南昌航空大学测试与光电工程学院江西南昌330063

为了使用高频条纹进行一次外差完成相位解包裹,实现高精度测量,提出了双频外差结合相位编码的相位解包裹方法。首先,用两组正弦条纹获得两个包裹相位,进行外差处理得到外差相位;其次,相位编码条纹得到条纹级次后对外差相位展开;最后,由... 详细信息

为了使用高频条纹进行一次外差完成相位解包裹,实现高精度测量,提出了双频外差结合相位编码的相位解包裹方法。首先,用两组正弦条纹获得两个包裹相位,进行外差处理得到外差相位;其次,相位编码条纹得到条纹级次后对外差相位展开;最后,由连续的外差相位对两个包裹相位进行展开,用最高频率的连续相位求得物体的相位信息。实验结果表明:RMS误差为0.038 mm。双频外差合成的周期不需要覆盖整个视场,打破了传统双频外差方法对频率选择的限制,可以用更高频率的条纹进行高精度测量。克服了相位主值误差对使用更高频率条纹进行高精度测量的局限性。

关键词：相位解包裹相位编码双频外差条纹级次

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从内在制度的作用与演化看中国的诚信问题

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当代经济研究 2009年第7期 49-52页

作者：符延军长春税务学院经贸外语系长春130117

制度对经济发展与社会进步是起着关键作用的。内在制度既发挥着制度的一般作用,是外在制度的前提与基础,同时也有着不同于外在制度的形成与演化路径。诚信是内在制度的重要部分,诚信问题就是如何建立与新的市场经济相适应的内在制度的... 详细信息

制度对经济发展与社会进步是起着关键作用的。内在制度既发挥着制度的一般作用,是外在制度的前提与基础,同时也有着不同于外在制度的形成与演化路径。诚信是内在制度的重要部分,诚信问题就是如何建立与新的市场经济相适应的内在制度的问题。由于内在制度形成时间较短,外在制度不完善和惩罚制度的缺失等原因,导致我国目前诚信缺失严重。要从社会改革、注重文化传统等方面,改善诚信状况。

关键词：内在制度演化诚信

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基于单目结构光的大物体三维测量关键方法的研究

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应用光学 2018年第2期39卷 212-219页

作者：伏燕军翁凌霄胡茗南昌工学院江西南昌330108

在单目结构光的三维测量系统中,由于投影仪倾斜投影,参考平面上的条纹周期展宽,给测量带来误差,降低了测量精度。同时受大物体自身几何和形貌等因素的影响,以及相交轴测量系统的限制,其单幅面测量范围受限,很难一次测量大物体完整的三... 详细信息

在单目结构光的三维测量系统中,由于投影仪倾斜投影,参考平面上的条纹周期展宽,给测量带来误差,降低了测量精度。同时受大物体自身几何和形貌等因素的影响,以及相交轴测量系统的限制,其单幅面测量范围受限,很难一次测量大物体完整的三维形貌,而且在测量大物体时,摄像机镜头非线性畸变也影响测量精度。根据参考平面上光栅条纹的周期变化规律,提出了一种适用性好、方便快捷的条纹周期校正的理论模型,在此基础上,提出了基于条纹周期校正的四步相移法的理论模型,进而提出了基于条纹周期校正的时间相位展开法的理论模型。采用摄像机镜头非线性畸变校正模型,提高测量精度。在被测物表面粘贴标志点,获取其三维坐标,利用SVD分解和L-M优化算法求取转换矩阵,并在设定的全局坐标系下实现三维图像拼接,采用线性加权算法,对重叠区域进行图像融合。实验结果表明,X轴的拼接误差为0.14mm,Y轴的拼接误差为0.16mm,Z轴的拼接误差为0.19mm,其拼接误差均在测量误差允许范围之内。

关键词：单目结构光大物体周期校正三维拼接标志点

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20世纪80年代中国农村集镇影院建设历史考

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当代电影 2020年第8期 52-58页

作者：边静扶彦君中国电影艺术研究中心北京光线影业有限公司

农村乡镇或集镇市场是电影市场的一个细分领域。20世纪80年代初,中国电影曾积极推动集镇影院的投资建设,一时成为全国农村电影市场的发展潮流。但80年代下半期,集镇影院发展明显放缓,到90年代,很多影院沉寂。80年代的集镇影院投建在促... 详细信息

农村乡镇或集镇市场是电影市场的一个细分领域。20世纪80年代初,中国电影曾积极推动集镇影院的投资建设,一时成为全国农村电影市场的发展潮流。但80年代下半期,集镇影院发展明显放缓,到90年代,很多影院沉寂。80年代的集镇影院投建在促进农村电影发展的同时,也暴露出投资效率不高等行业问题,对当下乡镇电影市场发展有很强的历史参考价值。

关键词：集镇/乡镇影院投资建设经营管理发展成效投资效率产业失衡

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Finite Element Analysis of A Variable Optical Attenuator Based on S-shape Polymer Waveguide

Finite Element Analysis of A Variable Optical Attenuator Bas...

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第七届高性能特种光学薄膜技术及应用学术研讨会

作者： Jing Wan Lingxun Wu Fenglan Xue Jian Hu yanjun fu Wei Zhang Fangren Hu Photoelectric Engineering College Nanjing University of Posts &Telecommunications

A variable optical attenuator(VOA) based on S-shape polymer waveguide is demonstrated at gamma = 1.55 *** VOA consists of straight input and output waveguides,an S-shape waveguide and a pair of deposited *** VOA is highly transparent in the voltage-off state but scatters light in the voltage-on *** cladding layer refractive index can be modified by using applied electric voltage,then the optical power passed throught the whole waveguide will be *** beam propagation method(BPM) and finite element analysis are employed to simulate and analyse the *** results show that the VOA has large variable attenuation range of 45 dB and low insertion loss of 0.8dB.

关键词： variable optical attenuator polymer finite element analysis attenuation

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