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高速道岔钢轨打磨廓形及磨耗规律试验研究

铁道建筑 2024年第8期64卷 1-6页

作者：马思远王树国杨东升王璞中国铁道科学研究院研究生部北京100081 中国铁道科学研究院集团有限公司铁道建筑研究所北京100081

针对多条线路上车站内18号高速道岔进行系统的现场试验,研究其目标打磨廓形的实际情况和道岔区钢轨磨耗演变规律。结果表明:目前全路道岔区基本上还是以60 kg/m钢轨轨头廓形作为目标打磨廓形。顺向过岔时直尖轨的垂向磨耗整体较曲尖轨... 详细信息

针对多条线路上车站内18号高速道岔进行系统的现场试验,研究其目标打磨廓形的实际情况和道岔区钢轨磨耗演变规律。结果表明:目前全路道岔区基本上还是以60 kg/m钢轨轨头廓形作为目标打磨廓形。顺向过岔时直尖轨的垂向磨耗整体较曲尖轨更严重,曲尖轨的侧向磨耗明显大于直尖轨;逆向过岔时直尖轨、曲尖轨的垂向磨耗基本上和顺向过岔时规律相同,径向磨耗整体大于顺向过岔时的,应重点关注。顺向、逆向过岔时,长心轨的垂向磨耗不断增大,最终趋于稳定,叉跟尖轨的垂向磨耗和侧向磨耗均是在开始承载位置处磨耗量值最大。顺向过岔时长心轨径向磨耗在顶宽40 mm之后均处于相对较大值,叉跟尖轨径向磨耗峰值主要出现在顶宽20 mm处;逆向过岔时长心轨径向磨耗峰值主要出现在顶宽71 mm处,叉跟尖轨径向磨耗峰值出现位置和顺向过岔时相同。

关键词：高速铁路道岔现场试验打磨廓形钢轨磨耗

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脑电图连通性指标在麻醉药物研究中的进展

临床麻醉学杂志 2024年第7期40卷 762-765页

作者：杨东升王甜梁振虎李民北京大学第三医院麻醉科 100191 燕山大学电气工程学院

脑电图(EEG)是一种无创脑部电活动测量方法,通过在头皮处安放电极,描记大脑皮层神经细胞所产生的兴奋性和抑制性突触活动的总和。EEG可揭示不同大脑区域的功能及其复杂的相互作用。利用EEG解析麻醉药物在神经中枢的作用机制、判断麻醉... 详细信息

脑电图(EEG)是一种无创脑部电活动测量方法,通过在头皮处安放电极,描记大脑皮层神经细胞所产生的兴奋性和抑制性突触活动的总和。EEG可揭示不同大脑区域的功能及其复杂的相互作用。利用EEG解析麻醉药物在神经中枢的作用机制、判断麻醉深度已成为当前的研究热点。本文拟对EEG的连通性分析方法及其在麻醉药物研究中的应用进行综述,以期进一步探讨未来可能用于研究麻醉药物作用机制的脑电分析方法。

关键词：脑电图连通性麻醉药物相干相位同步格兰杰因果关系

Anti-plane problem of nano-cracks emanating from a regular hexagonal nano-hole in one-dimensional hexagonal piezoelectric quasicrystals

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Chinese Physics B 2020年第10期29卷 328-335页

作者： dongsheng yang Guanting Liu College of Mathematics Science Inner Mongolia Normal UniversityHohhot 010022China

By constructing a new conformal mapping function, we study the surface effects on six edge nano-cracks emanating from a regular hexagonal nano-hole in one-dimensional (1D) hexagonal piezoelectric quasicrystals under anti-plane shear. Based on the Gurtin–Murdoch surface/interface model and complex potential theory, the exact solutions of phonon field, phason field and electric field are obtained. The analytical solutions of the stress intensity factor of the phonon field, the stress intensity factor of the phason field, the electric displacement intensity factor and the energy release rate are given. The interaction effects of the nano-cracks and nano-hole on the stress intensity factor of the phonon field, the stress intensity factor of the phason field and the electric displacement intensity factor are discussed in numerical examples. It can be seen that the surface effect leads to the coupling of phonon field, phason field and electric field. With the decrease of cavity size, the influence of surface effect is more obvious.

关键词： one-dimensional quasicrystals piezoelectricity surface effect energy release rate

Emission Trading Based Optimal Scheduling Strategy of Energy Hub with Energy Storage and Integrated Electric Vehicles

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 267-275页

作者： Yanhong Luo Xinwen Zhang dongsheng yang Qiuye Sun the School of Information Science and Engineering Northeastern UniversityShenyang 110004China

This paper focuses on the optimal scheduling of the district energy system with multiple energy supply modes and flexible *** multi-energy system(MES),the energy hub(EH)model including energy storage system and integrated electric vehicle(EV)is *** on the model,the influence of pollutant trading market on total operation cost is analyzed,and the optimal scheduling strategy is further put forward to realize the minimum purchase cost and emission tax cost of the ***,this paper compares the economic benefit of the fixed mode and the response mode,and discusses the contribution of the energy storage device and the multi-energy complementary mode to energy utilization *** simulation results indicate that optimal scheduling strategy of the EH can coordinate various energy complementary modes ***,the proposed strategy is able to improve the operation economy of the EH,and ensure the better response effect of the demand *** sensitivity analysis demonstrates the impact of pollutant emission price change on emission reduction.

关键词： Energy hub(EH) demand response electric vehicle(EV) energy storage emission trading operation optimization

A New Robust Adaptive Neural Network Backstepping Control for Single Machine Infinite Power System With TCSC

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 48-56页

作者： Yanhong Luo Shengnan Zhao dongsheng yang Huaguang Zhang A new robust adaptive neural network backstepping control for single machine infinite power system with TCSC Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110004 School of Information Science and Engineering Northeastern UniversityShenyang 110004China

For a single machine infinite power system with thyristor controlled series compensation(TCSC) device, which is affected by system model uncertainties, nonlinear time-delays and external unknown disturbances, we present a robust adaptive backstepping control scheme based on the radial basis function neural network(RBFNN). The RBFNN is introduced to approximate the complex nonlinear function involving uncertainties and external unknown disturbances, and meanwhile a new robust term is constructed to further estimate the system residual error,which removes the requirement of knowing the upper bound of the disturbances and uncertainty terms. The stability analysis of the power system is presented based on the Lyapunov function,which can guarantee the uniform ultimate boundedness(UUB) of all parameters and states of the whole closed-loop system. A comparison is made between the RBFNN-based robust adaptive control and the general backstepping control in the simulation part to verify the effectiveness of the proposed control scheme.

关键词： Backstepping control radial basis function neural network(RBFNN) robust adaptive control thyristor controlled series compensation(TCSC) uniform ultimate boundedness(UUB)

Robust Optimal Operation of Active Distribution Network Based on Minimum Confidence Interval of Distributed Energy Beta Distribution

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Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 423-430页

作者： Yanhong Luo Qiubo Nie dongsheng yang Bowen Zhou the Department of Electric Engineering Northeastern UniversityShenyang 110004China

With the gradual increase of distributed energy penetration,the traditional optimization model of distribution network can no longer guarantee the stable and efficient operation of the distribution *** order to deal with the inevitable uncertainty of distributed energy,a new robust optimal operation method is proposed for active distribution network(ADN)based on the minimum confidence interval of distributed energy Beta distribution in this ***,an ADN model is established with second-order cone to include the energy storage device,capacitor bank,static var compensator,on-load tap changer,wind turbine and ***,the historical data of related distributed energy are analyzed and described by the probability density function,and the minimum confidence interval is obtained by interval ***,via taking this minimum confidence interval as the uncertain interval,a less conservative two-stage robust optimization model is established and solved for *** simulation results for the IEEE33-bus distribution network have verified that the proposed method can realize a more stable and efficient operation of the distribution network compared with the traditional robust optimization method.

关键词： Active distribution network robust optimization Beta distribution second-order cone

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先天性单纯视网膜色素上皮错构瘤1例

中华眼底病杂志 2024年第6期40卷 465-467页

作者：陈艳君帅娜周波刘华成都爱迪眼科医院成都610000

患者女,51岁,因偶然发现右眼视物不清1年于2023年3月18日到成都爱迪眼科医院就诊。既往身体健康,否认其他全身系统性疾病史。眼科检查:右眼、左眼最佳矫正视力分别为0.05、1.0。右眼、左眼眼压分别为17、16 mm Hg(1 mm Hg=0.133 kPa)。... 详细信息

患者女,51岁,因偶然发现右眼视物不清1年于2023年3月18日到成都爱迪眼科医院就诊。既往身体健康,否认其他全身系统性疾病史。眼科检查:右眼、左眼最佳矫正视力分别为0.05、1.0。右眼、左眼眼压分别为17、16 mm Hg(1 mm Hg=0.133 kPa)。双眼晶状体轻度混浊。

关键词：视网膜色素上皮错构瘤先天性病例

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边底水气藏水侵规律研究现状与展望

天然气地球科学 2024年第7期35卷 1304-1322页

作者：杨东升谢坤殷庆国卢祥国肖京池沈伟军东北石油大学提高油气采收率教育部重点实验室黑龙江大庆163318 中国石油大港油田公司石油工程研究院天津300280 中国科学院力学研究所北京100049

从物理模拟、数值模拟和理论计算3个方面总结了边底水气藏水侵研究成果。在物理模拟方面,主要通过CT扫描、核磁共振、微观可视化和衰竭开采实验等手段研究剩余气形成机理及其分布特征,水相从高渗孔缝绕流进入低渗孔缝产生的绕流封闭气... 详细信息

从物理模拟、数值模拟和理论计算3个方面总结了边底水气藏水侵研究成果。在物理模拟方面,主要通过CT扫描、核磁共振、微观可视化和衰竭开采实验等手段研究剩余气形成机理及其分布特征,水相从高渗孔缝绕流进入低渗孔缝产生的绕流封闭气多存在于孔洞型储层,储层基质自吸水相产生的水锁封闭气多存在于孔隙型储层,气水界面能量最小化产生的卡断封闭气多存在于缝洞型储层。在数值模拟方面,对比了LBM和Level-set 2种方法的优缺点,通过LBM方法可研究毛管自吸、黏性耦合、湿相润滑及表观滑移等微观力学机制对气水两相渗流的影响,这4种作用效果越强,则气藏水侵越严重,采出程度越低,而Level-set方法侧重于描述气水界面的拓扑变化,当驱动压力达到一定阈值后,对应毛管中的气水界面开始运移,运移过程中毛管数>10^(-4)时,气相不易发生卡断,剩余气相对集中。在理论计算方面,总结了适用于不同气藏的水侵量及动态储量计算方法,通过分阶段的流动物质平衡方法可使计算误差<3%。最后,总结了各类研究方法及现有研究成果的不足,建议今后的研究重点应包括提高储层描述精度、完善物理模拟相似准则、整合并量化各类研究成果、强化室内实验成果的矿场应用4个方面。

关键词：气藏水侵物理模拟数值模拟水侵动态发展方向

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基于凸优化的反卷积相干目标识别算法

现代电子技术 2024年第17期47卷 73-78页

作者：杨东升郭晓彤宋建梅吴桐中国电波传播研究所山东青岛266107 中国人民解放军63893部队河南洛阳471000

为提高反卷积声源成像算法目标识别性能,改善其对相干目标识别效果不理想的问题,提出基于凸优化的反卷积相干声源识别算法。该算法利用阵列接收信号与导向向量共轭转置相乘得到波束输出,去除互谱操作,避免忽略互谱矩阵交叉项中的相干声... 详细信息

为提高反卷积声源成像算法目标识别性能,改善其对相干目标识别效果不理想的问题,提出基于凸优化的反卷积相干声源识别算法。该算法利用阵列接收信号与导向向量共轭转置相乘得到波束输出,去除互谱操作,避免忽略互谱矩阵交叉项中的相干声源信息;其次建立波束输出、目标分布与点扩散函数线性方程组,利用凸优化方法实现目标源强的高精度求解。通过模拟仿真和实验表明:提出的基于凸优化的反卷积相干目标识别算法能有效提高反卷积目标成像算法空间的分辨率和动态范围,在识别相干目标方面更具优势。

关键词：反卷积声源识别目标识别互谱矩阵凸优化点扩散函数