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Synchronization and firing mode transition of two neurons in a bilateral auditory system driven by a high–low frequency signal

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Chinese Physics B 2024年第5期33卷 722-735页

作者： Charles Omotomide Apata 唐浥瑞周祎凡蒋龙裴启明 School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China

The FitzHugh–Nagumo neuron circuit integrates a piezoelectric ceramic to form a piezoelectric sensing neuron,which can capture external sound signals and simulate the auditory neuron *** piezoelectric sensing neurons are coupled by a parallel circuit consisting of a Josephson junction and a linear resistor,and a binaural auditory system is *** the non-singleness of external sound sources,the high–low frequency signal is used as the input signal to study the firing mode transition and synchronization of this *** is found that the angular frequency of the high–low frequency signal is a key factor in determining whether the dynamic behaviors of two coupled neurons are *** they are in synchronization at a specific angular frequency,the changes in physical parameters of the input signal and the coupling strength between them will not destroy their *** addition,the firing mode of two coupled auditory neurons in synchronization is affected by the characteristic parameters of the high–low frequency signal rather than the coupling *** asynchronous dynamic behavior and variations in firing modes will harm the auditory *** findings could help determine the causes of hearing loss and devise functional assistive devices for patients.

关键词： piezoelectric ceramic Josephson junction auditory neuron synchronization

Potential efficacy and mechanism of medicinal plants on chronic kidney disease-associated vascular calcification:a review

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Traditional Medicine Research 2024年第9期9卷 21-31页

作者： Han-Qing Zhang Shuang Wu Xin Chen Ya-Xuan Fang Qiu-Mei Lan Zi-Jun Zhou Yan-Heng Qiao Jie Li Yan-Ru Zhao ming pei Bo Yang Department of Nephropathy First Teaching Hospital of Tianjin University of Traditional Chinese MedicineTianjin 300381China National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion Tianjin 300381China

Vascular calcification is a crucial risk factor that affects the incidence and mortality of cardiovascular disease in chronic kidney disease *** medicine relies on calcium-phosphorus binding agents,calcium mimetics,active vitamin D,and hemodialysis to prevent and treat vascular calcification,however,their efficacy is unsatisfactory and adverse reactions often *** plant therapy can act as an integrative regulator in patients with chronic kidney disease-associated vascular calcification,which can significantly improve patients’symptoms,but its specific mechanism has not been fully elucidated *** this paper,we reviewed the domestic and international theoretical studies on the pathogenesis mechanism of chronic kidney disease-associated vascular calcification in recent years,summarized eight active ingredients of medicinal plants as well as four compound formulas for improving chronic kidney disease-associated vascular calcification,and explored the mechanism of action of herbal medicine,which will provide a new strategy for promoting the prevention and treatment of vascular calcification.

关键词： chronic kidney disease chronic kidney disease-mineral and bone disorder(CKD-MBD) vascular calcification medicinal plants herbal monomers

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舆论式反恐模式运行探究

湖北警官学院学报 2024年第4期37卷 58-68页

作者：裴明中国刑事警察学院辽宁沈阳110854

舆论式反恐作为重要的反恐模式,在反恐主体、反恐内容和反恐效果等层面具有宣教性,以运行主体、运行旨归和运行影响搭建运行基础,以运行场域、运行逻辑和运行步骤组建运行途径,以运行工具、运行方法和运行保障构建运行手段。有效运行舆... 详细信息

舆论式反恐作为重要的反恐模式,在反恐主体、反恐内容和反恐效果等层面具有宣教性,以运行主体、运行旨归和运行影响搭建运行基础,以运行场域、运行逻辑和运行步骤组建运行途径,以运行工具、运行方法和运行保障构建运行手段。有效运行舆论式反恐模式,有利于丰富反恐模式的理论体系,提高反恐主体的反恐能力,推动反恐治理工作的系统性提升。

关键词：恐怖主义恐怖袭击反恐模式舆论式反恐

维普期刊数据库博看期刊

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风电和光伏发电功率联合预测与预调度框架

高电压技术 2024年第9期50卷 3823-3836页

作者：叶林裴铭李卓宋旭日罗雅迪汤涌中国农业大学信息与电气工程学院北京100083 电网安全全国重点实验室(中国电力科学研究院有限公司) 北京100192

随着多区域互联电力系统的发展,风电、光伏等新能源发电大规模并网,风电-光伏功率的联合预测和协调调度是必然趋势和迫切需求。为此,从风电-光伏发电的时空相关性分析出发,对风电-光伏功率时空耦合、风电光伏联合预测建模、风电光伏联... 详细信息

随着多区域互联电力系统的发展,风电、光伏等新能源发电大规模并网,风电-光伏功率的联合预测和协调调度是必然趋势和迫切需求。为此,从风电-光伏发电的时空相关性分析出发,对风电-光伏功率时空耦合、风电光伏联合预测建模、风电光伏联合预测模型参数优化、考虑风电-光伏联合预测的电力系统预调度等方面进行了分析讨论。首先,研究揭示风电-光伏功率在时间-空间上的交互影响机理,提出面向多时间尺度的风电-光伏功率时间互补性分析方法,建立风电-光伏发电空间相关性量化模型,构建基于多阶图卷积神经网络风电-光伏发电时空耦合模型;基于此,研究提出了融合异构图神经网络的风电-光伏联合预测方法,建立了风电-光伏联合预测模型参数优化模型,构建了新能源有功功率预测误差矢量评价体系,为风电-光伏联合发电系统的协调调度和控制提供决策支撑;在风电-光伏联合发电预测的基础上,采用风电、光伏发电时间互补、空间互济的思路探讨了风电-光伏联合的电力系统预调度策略和方法,对不同时间尺度风电-光伏的协调调度策略进行了剖析,建立了电网-区域-集群-场站空间递阶的风电-光伏联合发电系统分层调度框架。最后,展望了未来风电-光伏联合预测与预调度方面应研究的方向。

关键词：风电-光伏联合预测时空相关性异构图神经网络风电-光伏协调调度电力系统预调度

计及频率响应时空相关性的新能源电力系统惯量估计方法

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电力系统自动化 2024年第8期48卷 53-66页

作者：裴铭叶林罗雅迪沙立成张再驰宋旭日中国农业大学信息与电气工程学院北京市100083 中国电力科学研究院有限公司北京市100192 国网北京市电力公司北京市100031 国网北京市电力公司电力科学研究院北京市100075

高比例新能源电力系统惯性水平低、不确定性强,系统惯性水平与频率动态响应过程密切相关。系统内各节点之间的频率响应过程在时空上具有相关性,动态量化节点间频率的时空相关性是实时估计新型电力系统惯量的技术手段。首先,给出了面向... 详细信息

高比例新能源电力系统惯性水平低、不确定性强,系统惯性水平与频率动态响应过程密切相关。系统内各节点之间的频率响应过程在时空上具有相关性,动态量化节点间频率的时空相关性是实时估计新型电力系统惯量的技术手段。首先,给出了面向同步机组和新能源发电机组惯量的计算方法;其次,利用Granger因果检验算法,动态分析系统内不同节点之间频率的相关性,构建随时间变化的系统频率时空因果相关集合;此外,基于系统内各节点频率响应过程的摇摆方程,建立系统惯性常数-频率状态空间模型;然后,基于无迹卡尔曼滤波器和固定滞后平滑器,提出高比例新能源电力系统惯量估计方法;最后,在改进的IEEE 39节点系统中验证了所提方法的有效性和适用性。结果表明,所提方法可以在不同新能源渗透率和频率扰动场景下保证惯量估计效果的一致性,具有工程应用潜力。

关键词：惯量估计电力系统新能源因果相关状态空间频率响应滤波-平滑两阶段估计

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针刺安慰剂效应剖析

针刺研究 2024年第8期49卷 875-879页

作者：王毓婷张培铭董昱范宝超陆丽明广州中医药大学针灸康复临床医学院广州510000 广州中医药大学华南针灸研究中心/临床研究与大数据实验室广州510000

针刺是以中医理论为内核的多因素综合疗法,目前关于针刺“安慰剂效应”的争议颇多。本文旨在阐明“安慰针刺”的定义、组成和研究目的,指出其与“假针刺”的区别;厘清针刺“安慰剂效应”和“内在效力”之间的关系,辨析针刺临床试验中“... 详细信息

针刺是以中医理论为内核的多因素综合疗法,目前关于针刺“安慰剂效应”的争议颇多。本文旨在阐明“安慰针刺”的定义、组成和研究目的,指出其与“假针刺”的区别;厘清针刺“安慰剂效应”和“内在效力”之间的关系,辨析针刺临床试验中“观察到的安慰剂效应”和“真实的安慰剂效应”之间的差异,并提出现阶段实施“安慰针刺”和“假针刺”对照的困境与展望,以期为优化针刺随机对照试验提供新思路。

关键词：假针刺安慰针刺随机对照试验安慰剂效应

Predicting the shrinkage of thermal insulation mortar by probabilistic neural networks

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第3期11卷 212-222页

作者： Yi-qun DENG pei-ming WANG Key Laboratory of Advanced Civil Engineering Materials Ministry of EducationTongji UniversityShanghai 200092China

This study explored the potential of using probabilistic neural networks (PNN) to predict shrinkage of thermal insulation *** results were obtained from the PNN model with the aid of Parzen non-parametric estimator of the probability density functions (PDF).Five variables,water-cementitious materials ratio,content of cement,fly ash,aggregate and plasticizer,were employed for input variables,while a category of 56-d shrinkage of mortar was used for the output variable.A total of 192 groups of experimental data from 64 mixtures designed using JMP7.0 software were collected,of which 120 groups of data were used for training the model and the other 72 groups of data for *** simulation results showed that the PNN model with an optimal smoothing parameter determined by the curves of the mean square error (MSE) and the number of unrecognized probability densities (UPDs) exhibited a promising capability of predicting shrinkage of mortar.

关键词： Mortar Shrinkage Probabilistic neural networks (PNN) Thermal insulation

Effect of temperature on the hydration process and strength development in blends of Portland cement and activated coal gangue or fly ash

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第2期12卷 162-170页

作者： pei-ming WANG Xian-ping LIU Key Laboratory of Advanced Civil Engineering Materials (Tongji University) Ministry of Education Shanghai 201804 China

This paper describes the results of an investigation into the effect of the variation of curing temperatures between 0 and 60 °C on the hydration process,pore structure variation,and compressive strength development of activated coal gangue-cement blend(ACGC) . Hardened ACGC pastes cured for hydration periods from 1 to 360 d were examined using the non-evaporable water method,thermal analysis,mercury intrusion porosimetry,and mechanical testing. To evaluate the specific effect of activated coal gangue(ACG) as a supplementary cementing material(SCM) ,a fly ash-cement blend(FAC) was used as a control. Results show that raising the curing temperature accelerates pozzolanic reactions involving the SCMs,increasing the degree of hydration of the cement blends,and hence increasing the rate of improvement in strength. The effect of curing temperature on FAC is greater than that on ACGC. The pore structure of the hardened cement paste is improved by increasing the curing temperature up to 40 °C,but when the curing temperature reaches 60 °C,the changing nature of the pore structure leads to a decrease in strength. The correlation between compressive strength and the degree of hydration and porosity is linear in nature.

关键词： Activated coal gangue (ACG) Fly ash (FA) Blended cement Hydration Curing temperature Strength

装配式钢筋混凝土梁柱螺栓连接节点抗震性能试验

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工程抗震与加固改造 2024年第3期46卷 72-80页

作者：吴东平裴明晓李成玉武汉科技大学城市建设学院湖北武汉430065

提出了一种干式装配式梁柱节点,该节点由核心区梁端外包钢套筒与柱预留孔洞实现螺栓连接。为了验证节点构造的合理性,揭示其受力工作机理,设计并制作3组节点试件,以轴压比和螺栓等级作为试验变量,进行了3个工况的低周往复拟静力破坏性... 详细信息

提出了一种干式装配式梁柱节点,该节点由核心区梁端外包钢套筒与柱预留孔洞实现螺栓连接。为了验证节点构造的合理性,揭示其受力工作机理,设计并制作3组节点试件,以轴压比和螺栓等级作为试验变量,进行了3个工况的低周往复拟静力破坏性试验。研究节点破坏形式及抗震性能,得到试件的滞回曲线和骨架曲线,分析节点的荷载特征值、延性、耗能和刚度退化。试验结果表明:3个试件的破坏均发生在梁端,节点核心区均没有破坏,满足“强节点弱构件”设计要求;试件滞回曲线饱满,延性系数均大于3.6,黏滞阻尼系数均大于1.5,具有良好的抗震性能;降低螺栓等级能提高节点刚度,但对节点承载力影响有限;增大轴压比时,刚度显著提高,但延性和耗能能力有所降低。在试验结果的基础上,采用ABAQUS对节点进行参数化分析,得出不同参数变化对节点力学性能影响,使试验更有对比性、分析更全面、结论更准确。

关键词：装配式混凝土梁柱节点延性耗能能力抗震性能有限元