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Dynamics and synchronization in a memristor-coupled discrete heterogeneous neuron network considering noise

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Chinese Physics B 2024年第2期33卷 537-544页

作者：晏询李志军李春来 School of Automation and Electronic Information Xiangtan UniversityXiangtan 411105China School of Computer Science&School of Cyberspace Science Xiangtan UniversityXiangtan 411105China

Research on discrete memristor-based neural networks has received much ***,current research mainly focuses on memristor–based discrete homogeneous neuron networks,while memristor-coupled discrete heterogeneous neuron networks are rarely *** this study,a new four-stable discrete locally active memristor is proposed and its nonvolatile and locally active properties are verified by its power-off plot and DC V–I *** on two-dimensional(2D)discrete Izhikevich neuron and 2D discrete Chialvo neuron,a heterogeneous discrete neuron network is constructed by using the proposed discrete memristor as a coupling synapse connecting the two heterogeneous *** the coupling strength as the control parameter,chaotic firing,periodic firing,and hyperchaotic firing patterns are *** particular,multiple coexisting firing patterns are observed,which are induced by different initial values of the *** synchronization between the two heterogeneous neurons is discussed and it is found that they can achieve perfect synchronous at large coupling ***,the effect of Gaussian white noise on synchronization behaviors is also *** demonstrate that the presence of noise not only leads to the transition of firing patterns,but also achieves the phase synchronization between two heterogeneous neurons under low coupling strength.

关键词： heterogeneous neuron network discrete memristor coexisting attractors synchronization noise

Dynamical behaviors in discrete memristor-coupled small-world neuronal networks

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Chinese Physics B 2024年第4期33卷 729-734页

作者：鲁婕妤谢小华卢亚平吴亚联李春来马铭磷 School of Automation and Electronic Information Xiangtan UniversityXiangtan 411105China School of Computer Science School of Cyberspace Science Xiangtan UniversityXiangtan 411105China

The brain is a complex network system in which a large number of neurons are widely connected to each other and transmit signals to each *** memory characteristic of memristors makes them suitable for simulating neuronal synapses with *** this paper,a memristor is used to simulate a synapse,a discrete small-world neuronal network is constructed based on Rulkov neurons and its dynamical behavior is *** explore the influence of system parameters on the dynamical behaviors of the discrete small-world network,and the system shows a variety of firing patterns such as spiking firing and triangular burst firing when the neuronal parameterαis *** results of a numerical simulation based on Matlab show that the network topology can affect the synchronous firing behavior of the neuronal network,and the higher the reconnection probability and number of the nearest neurons,the more significant the synchronization state of the *** addition,by increasing the coupling strength of memristor synapses,synchronization performance is *** results of this paper can boost research into complex neuronal networks coupled with memristor synapses and further promote the development of neuroscience.

关键词： small-world networks Rulkov neurons memristor synchronization

沙库巴曲缬沙坦对射血分数保留型心衰患者心功能及炎性因子的影响

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现代诊断与治疗 2024年第1期35卷 7-11页

作者：李春来赣县区人民医院江西赣州341100

目的探究常规治疗联合沙库巴曲缬沙坦对射血分数保留型心衰患者心功能及炎性因子等的影响。方法选取2020年1月至2023年3月我院收治的射血分数保留型心衰患者62例,采用随机数字表法分为对照组和观察组各31例。对照组给予常规治疗,观察组... 详细信息

目的探究常规治疗联合沙库巴曲缬沙坦对射血分数保留型心衰患者心功能及炎性因子等的影响。方法选取2020年1月至2023年3月我院收治的射血分数保留型心衰患者62例,采用随机数字表法分为对照组和观察组各31例。对照组给予常规治疗,观察组在常规治疗基础联合沙库巴曲缬沙坦治疗。比较两组治疗前后心功能、炎性因子、生活质量,比较两组疗效及不良反应发生情况。结果观察组临床总有效率为96.77%,高于对照组的80.65%,差异有统计学意义(P<0.05)。治疗后,两组6MWT长于均治疗前,且观察组长于对照组,两组HR、LVESD水平均低于治疗前,且观察组低于对照组,两组LVEF水平均高于治疗前,且观察组高于对照组,差异有统计学意义(P<0.05)。治疗后,两组血清TNF-α、IL-6、hs-CRP水平均低于治疗前,且观察组低于对照组,差异有统计学意义(P<0.05)。治疗后,两组社会、心理、躯体功能及物质生活评分均高于治疗前,且观察组高于对照组,差异有统计学意义(P<0.05)。观察组不良反应发生率为6.45%,低于对照组的25.81%,差异有统计学意义(P<0.05)。结论沙库巴曲缬沙坦能抑制射血分数保留型心衰患者炎性因子的产生,保护心功能,提高疗效和生活质量,且减少不良反应的发生。

关键词：射血分数保留型心衰沙库巴曲缬沙坦

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基于多元成本结构的分时电价定价机制

湖南科技大学学报（自然科学版） 2024年第1期39卷 60-69页

作者：王岱刘颖潘昌忠李春来李福东国网宁夏电力有限公司银川供电公司宁夏银川750011 湖南科技大学信息与电气工程学院湖南湘潭411201 湖南理工学院物理与电子学院湖南岳阳414006 北京信息科技大学机电工程学院北京100192

建设新型电力系统对完善分时电价机制提出了新的要求.针对目前分时电价研究多侧重于市场机制,对电价设置菜单与实际供电成本结构关系有待深化机理建模的问题,提出一种基于多元化供电成本和需求响应的分时电价模型.该模型兼顾经济性与可... 详细信息

建设新型电力系统对完善分时电价机制提出了新的要求.针对目前分时电价研究多侧重于市场机制,对电价设置菜单与实际供电成本结构关系有待深化机理建模的问题,提出一种基于多元化供电成本和需求响应的分时电价模型.该模型兼顾经济性与可靠性,建立考虑需求削减的负荷切片与成本定价机制,明确供电配置的多元化成本结构,建立各类电源的可变成本、固定成本与可靠性损失成本的成本结构.对电力销售收入分析、电源的实际可变成本、电源可靠性损失和固定成本回收进行了基础性研究.通过相关算例验证,研究各类电源事故率对模型中附加费率的影响,以及各类电源事故率、不同负荷水平波动与分时电价定价的关联性,验证了文章建立的分时电价模型在提高分时电价适应性,正确引导用户用电行为,提高削峰填谷方面的有效性.同时,该模型有助于优化各类电源的容量管理,确保峰值电源的成本回收,从而有效地平衡电源侧和用户侧利益,兼顾供电充分性、可靠性和经济性目标.

关键词：需求响应分时电价机制固定成本可变成本可靠性成本削峰填谷

Scientific data and their release of Chang'E-1 and Chang'E-2

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Chinese Journal Of Geochemistry 2014年第1期33卷 24-44页

作者： ZUO Wei li chunlai ZHANG Zhoubin The Science and Application Center for Moon and Deepspace Exploration National Astronomical ObservatoriesChinese Academy of Sciences

The Chang'E-1 and Chang'E-2 missions have successfully obtained a huge amount of lunar scientific data, through the seven onboard instruments including a CCD stereo camera, a laser altimeter, an interference imaging spectrometer, an X-ray spectrometer, a microwave radiometer, a high-energy particle detector and a solar-wind ion detector. Most of the Chang'E data are now publicly available to the science community, and this article serves as an official guide on how these data are classified and organized, and how they can be retrieved from http://159.***.88.59:7779/CE1OutENGWeb/. This article also presents the detailed specifications of various instruments and gives examples of research progress made based on these instruments.

关键词：科学数据嫦娥一号 X射线光谱仪激光高度计离子探测器立体相机成像技术微波辐射

Optimal dispatch of zero-carbon-emission micro Energy Internet integrated with non-supplementary fired compressed air energy storage system

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Journal of Modern Power Systems and Clean Energy 2016年第4期4卷 566-580页

作者： Rui li Laijun CHEN Tiejiang YUAN chunlai li Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Department of Electrical Engineering Xinjiang UniversityUrumqi 830046China Qinghai Electrical Power Research Institute Qinghai Electric Power CorporationXining 810008China

To utilize heat and electricity in a clean and integrated manner,a zero-carbon-emission micro Energy Internet(ZCE-MEI) architecture is proposed by incorporating non-supplementary fired compressed air energy storage(NSF-CAES) hub.A typical ZCE-MEI combining power distribution network(PDN) and district heating network(DHN) with NSF-CAES is considered in this ***-CAES hub is formulated to take the thermal dynamic and pressure behavior into account to enhance dispatch flexibility.A modified Dist Flow model is utilized to allow several discrete and continuous reactive power compensators to maintain voltage quality of *** operation of the ZCE-MEI is firstly modeled as a mixed integer nonlinear programming(MINLP).Several transformations and simplifications are taken to convert the problem as a mixed integer linear programming(MILP)which can be effectively solved by CPLEX.A typical test system composed of a NSF-CAES hub,a 33-bus PDN,and an 8-node DHN is adopted to verify the effectiveness of the proposed ZCE-MEI in terms of reducing operation cost and wind curtailment.

关键词： Zero-carbon-emission micro Energy Internet Non-supplementary fired compressed air energy storage District heating network Power distribution network Dist Flow Mixed integer linear programming

Innovative developments in lunar and planetary science promoted by China's lunar exploration

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Science China Earth Sciences 2023年第11期66卷 2399-2418页

作者： chunlai li Wei YAN Jianjun liU Ziyuan OUYANG Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Institute of Geochemistry Chinese Academy of SciencesGuiyang 550002China

As the only natural satellite of the earth, the Moon has always been the first choice for human exploration of the solar system. China's lunar exploration project(Chang'e project) was launched in 2004. At present, it has created a perfect end to the three phases of “orbiting, landing and returning”. A series of remarkable research achievements have been made on the basic issues of current lunar scientific research, such as the Earth-Moon space environment, lunar surface material, morphology,geological structure, lunar subsurface and internal structure, and the origin and evolution of the Moon, further deepening the human understanding of the Moon. This paper briefly reviews the development process of China's lunar exploration project,summarizes the main research results and scientific understanding, and finally prospects to the future development of China's lunar and planetary exploration.

关键词： Lunar exploration Lunar science Chang'e project Scientific achievements Future prospects

Nomenclature for lunar features at the Chang＇e-3 landing site

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Acta Geochimica 2017年第2期36卷 213-223页

作者： Zhoubin Zhang chunlai li Wei Zuo Xingguo Zeng Key Laboratory of Lunar and Deep Space Exploration Chinese Academy of Sciences Beijing 100012 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China College of Astronomy and Space Sciences University of Chinese Academy of Sciences Beijing 100049 China

Nomenclatures for lunar features always accompany the progresses of human lunar exploration,which has an important dual meaning in culture and science. The naming of lunar features not only can commemorate the outstanding contributions of academics,masters in various fields, and popularize the traditional cultures of ethnic groups all over the world, but also have a critical function of providing accurate indicative information on features with special morphology, origin, nature and scientific value. However, nomenclature for features at the Chang'e-3 landing site, which has a more arbitrary form without many constrains posed by a uniformed system, is unlike the features for other morphological *** paper originated from the actual needs for the description of scientific exploration activities, interpretation of scientific research and dissemination of scientific results. Some prominent morphological units with great scientific importance and identification purpose were chosen from the images taken by the terrain camera, panorama cameras and landing camera onboard the Chang'e lander and Yutu rover. A nomenclature system was established under the three enclosures, four quadrants and twenty-eight lunar lodges' system of the Chinese ancient sky division method. Finally, a standard feature names set waspublished after some necessary approval procedures by the International Astronomical Union.

关键词： Moon Chang'e-3 Landing site Lunarfeature nomenclature

Quantification of the chemical composition of lunar soil in terms of its reflectance spectra by PCA and SVM

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Chinese Journal Of Geochemistry 2009年第2期28卷 204-211页

作者： ZHANG Xiaoyu li chunlai LU Chang Graduate University of Chinese Academy of Sciences Beijing 100049 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

In the second phase of the Chang'E Program an unmanned lunar rover will be launched onto the Moon. When ground scientists get a full understanding of the chemical composition of lunar soil around the rover, they can make more detailed survey plans for the rover and various payloads onboard so as to satisfy their scientific objectives. There is an obvious relationship between the reflectance of lunar soil and its chemical characteristics. Both principal component analysis (PCA) and support vector machine (SVM) models were applied to establishing the relationship between the reflectance spectra and chemical compositions of lunar highland and mare soil samples sent back by Apollo missions 11, 12, 14, 15, 16 and 17 and measured by Lunar Soil Characterization Consortium (LSCC). PCA was used to reduce and select the features of the reflectance spectra of lunar soil samples. Then, these features were put into SVM to estimate the abundances of various chemical components in lunar soil. We also compared the results of our measurement with those obtained by the SVM model [partial least squares (PLS)] and the principal component regression (PCR) model reported in literature. Our studies showed that with the exception of TiO2, the results of prediction of the abundances of chemical compounds in lunar soil by our model are much more reliable than those reported in literature. The reflectance spectra of lunar soil are closely related to the materials from which it was derived.

关键词：主成分分析月球土壤反射光谱支持向量机化学成分 SVM模型土壤样品偏最小二乘