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基于贝叶斯推理的风电机组风轮偏航协同智能控制方法

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可再生能源 2024年第9期42卷 1205-1210页

作者：邬伟骏吴江波周强姜文兵国家电投集团江西赣州新能源有限公司江西赣州330000

风向的变化对风电机组的偏航控制是一个挑战。对于风向的频繁变化,如果风电机组的反应速度过慢,无法及时调整偏航角度,将会影响发电效率。为了准确控制风电机组风轮偏航问题,文章提出了一种基于贝叶斯推理的风电机组风轮偏航协同智能控... 详细信息

风向的变化对风电机组的偏航控制是一个挑战。对于风向的频繁变化,如果风电机组的反应速度过慢,无法及时调整偏航角度,将会影响发电效率。为了准确控制风电机组风轮偏航问题,文章提出了一种基于贝叶斯推理的风电机组风轮偏航协同智能控制方法。在考虑风速随机性的情况下,分析风向信号,获取风向样本数据。引入贝叶斯分类器,结合风向正态分析模型,计算服从上一批样本分布的风向样本后验概率,将其作为警戒值调节基准,建立基于贝叶斯推理的网络警戒值调节机制,通过爬山算法调节警戒值,完成风电机组风轮偏航协同智能控制。实验结果表明,所提方法对风电机组风轮偏航展开协同智能控制后,机舱位置出现偏航的次数为0,且偏航控制时间短,表明该方法可以完成风电机组风轮偏航协同智能控制。

关键词：考虑风速随机性风电机组风轮偏航协同智能控制

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基于400 nm氮化硅平台的片上光放大器波导宽度的优化模型

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光学学报 2024年第11期44卷 97-103页

作者：陈明哲江文兵杜嘉张博宇陈卫标周立兵中国科学技术大学光学与光学工程系安徽合肥230026 中国科学院上海光学精密机械研究所空天激光技术与系统部上海201800 中国科学院大学材料科学与光电技术学院北京100049

提出一种基于400 nm氮化硅平台的掺铒光波导放大器(EDWA)波导宽度的精确设计模型。首先,采用半矢量有限差分法获取波导的截止条件与信号光单模条件,确定波导宽度的设计范围。其次,考虑光纤-波导的耦合过程以及泵浦光经过端面耦合器时会... 详细信息

提出一种基于400 nm氮化硅平台的掺铒光波导放大器(EDWA)波导宽度的精确设计模型。首先,采用半矢量有限差分法获取波导的截止条件与信号光单模条件,确定波导宽度的设计范围。其次,考虑光纤-波导的耦合过程以及泵浦光经过端面耦合器时会对不同模式产生不同的激发效应,仿真设计一种针对980 nm泵浦光的双层端面耦合器,分析不同波导宽度对应的功率分配系数,从而精确建模泵浦光模场。最后,考虑1550 nm信号光与980 nm泵浦光的相互作用,优化EDWA的速率-传输方程,系统地分析不同波导宽度与长度对EDWA增益的影响,并对比分析未考虑信号光与泵浦光相互作用的增益性能,确定增益效果最好的波导宽度与长度。结果表明:信号光与泵浦光的相互作用是影响增益效果的重要因素,同时也为高增益系数的EDWA器件精确设计奠定基础。

关键词：集成光学光波导放大器速率方程增益

神经酰胺与急性心肌梗死新发心房颤动风险的关联分析

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温州医科大学学报 2024年第8期54卷 657-663页

作者：管凡路姜文兵温州医科大学定理临床学院浙江温州325000 温州市人民医院心血管内科浙江温州325000 温州市中西医结合医院心血管内科浙江温州325000

目的:分析急性心肌梗死(AMI)患者新发心房颤动(AF)的临床特征,并探讨神经酰胺与AMI患者新发AF风险的关联。方法:选取2020年1月至2024年3月于温州市人民医院就诊的AMI患者815例,其中85例患者于入院24 h内出现新发AF。采集并比较房颤组(AF... 详细信息

目的:分析急性心肌梗死(AMI)患者新发心房颤动(AF)的临床特征,并探讨神经酰胺与AMI患者新发AF风险的关联。方法:选取2020年1月至2024年3月于温州市人民医院就诊的AMI患者815例,其中85例患者于入院24 h内出现新发AF。采集并比较房颤组(AF组)和非房颤组(non-AF组)患者人口统计学、合并症、入院时采集的实验室检查和神经酰胺水平(C16、C24、C24:1)。用多因素Logistic回归分别对不同变量进行调整,进而分析神经酰胺与AMI患者新发AF风险之间的关联及潜在机制。结果:与non-AF组比,AF组AMI患者年龄较大,男性及合并症占比较高(P<0.05)。对基线特征调整后,神经酰胺水平与AMI患者AF风险间存在关联(C16:OR=1.99,95%CI=1.15~3.46,P=0.014;C24:OR=0.87,95%CI=0.78~0.97,P=0.013;C24:1:OR=1.33,95%CI=1.05~1.69,P=0.016),对CRP、NT-proBNP进行调整后关联性减弱。结论:神经酰胺与AMI患者新发AF存在关联,其中C16、C24:1升高与AF风险增加有关,而C24升高则与AF风险降低有关。

关键词：心肌梗死心房颤动神经酰胺心力衰竭生化标志物

液氧液甲烷同温共底贮存瞬态热力特性仿真研究

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低温工程 2024年第1期 12-21页

作者：张武杰胡聪蒋文兵孙培杰李鹏许安易黄永华上海交通大学制冷与低温工程研究所上海200240 上海宇航系统工程研究所上海201108

针对大面积冷屏保护下的液氧/液甲烷同温共底贮箱,建立了耦合真空多层绝热与主动制冷系统的瞬态传热模型,研究了液氧/液甲烷共底自增压与零蒸发贮存过程中贮箱外部绝热结构与内部气液相的热力参数变化规律,讨论了共底夹层采用不具有绝... 详细信息

针对大面积冷屏保护下的液氧/液甲烷同温共底贮箱,建立了耦合真空多层绝热与主动制冷系统的瞬态传热模型,研究了液氧/液甲烷共底自增压与零蒸发贮存过程中贮箱外部绝热结构与内部气液相的热力参数变化规律,讨论了共底夹层采用不具有绝热能力的材料对液氧/液甲烷共底零蒸发贮存特性的影响。研究结果表明,在适当的冷量输入条件下,大面积冷屏方案可以实现外界漏热的有效阻挡;采用铝合金共底夹层有利于稳定液氧和液甲烷的共底贮存状态,使液氧/液甲烷在20 h内快速达到热平衡;在零蒸发贮存周期内,液氧/液甲烷共底贮存温度波动小于0.2 K,压力波动小于2.46 kPa且具有抗热扰动的能力。

关键词：零蒸发液氧液甲烷共底贮存热力特性

CaPtAs: A new noncentrosymmetric superconductor

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Science China(Physics,Mechanics & Astronomy) 2020年第3期63卷 98-105页

作者： Wu Xie PeiRan Zhang Bin Shen wenbing jiang GuiMing Pang Tian Shang Chao Cao Michael Smidman HuiQiu Yuan Center for Correlated Matter and Department of Physics Zhejiang UniversityHangzhou 310058China Physik-Institut Universitat ZürichZurich CH-8057Switzerland Department of Physics Hangzhou Normal UniversityHangzhou 310036China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

We report the discovery of a new noncentrosymmetric superconductor *** crystallizes in a tetragonal structure(space group I41md,No.109),featuring three dimensional honeycomb networks of Pt-As and a much elongated c-axis(a=b=4.18?,and c=43.70?).The superconductivity of CaPtAs with Tc=1.47 K was characterized by means of electrical resistivity,specific heat,and ac magnetic *** electronic specific heat Ce(T)/T shows evidence for a deviation from the behavior of a conventional BCS superconductor,and can be reasonably fitted by a p-wave *** upper critical fieldμ0Hc2 of CaPtAs exhibits a moderate anisotropy,with an in-plane value of around 204 mT and an out-of-plane value of 148 *** functional theory calculations indicate that the Pt-5 d and As-4 p orbitals mainly contribute to the density of states near the Fermi level,showing that the Pt-As honeycomb networks may significantly influence the superconducting properties.

关键词： noncentrosymmetric superconductivity CaPtAs

Fabrication and characterization of all-Nb lumped-element Josephson parametric amplifiers

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Chinese Physics B 2021年第6期30卷 43-47页

作者： Hang Xue Zhirong Lin wenbing jiang Zhengqi Niu Kuang Liu Wei Peng Zhen Wang State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China ShanghaiTech University Shanghai 201210China

Josephson parametric amplifiers (JPAs) with nearly quantum-limited noise performance have become indispensable devices for the measurements of superconducting quantum information. We have developed an all-Nb lumped-element flux-driven JPA operating in the three-wave mixing mode. Our Nb-based JPA comprises Nb/Al-AlOx/Nb Josephson junctions, a parallel-plate capacitor with SiO2 dielectric sandwiched between two Nb layers, a bottom coplanar waveguides layer, and a top Nb wiring layer. We experimentally demonstrate a 20 dB gain over a 190 MHz bandwidth, a mean 1 dB compression of -123 dBm, and near quantum-limited noise performance. This fabrication process can be further used to design impedance transformed parametric amplifiers for multiple-qubit readout.

关键词： Josephson parametric amplifier Nb/Al-AlOx/Nb Josephson junctions lumped-element resonator

Introduction to the Special Issue on ComputerModeling for Smart Cities Applications

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Computer Modeling in Engineering & Sciences 2024年第2期138卷 1015-1017页

作者： wenbing Zhao Chenxi Huang Yizhang jiang Department of Electrical and Computer Engineering Cleveland State UniversityClevelandOH 44115USA School of Computer Science Xiamen UniversityXiamen36100China School of Artificial Intelligent and Computer Jiangnan UniversityWuxi224122China

A significant fraction of the world’s population is living in cities. With the rapid development ofinformation and computing technologies (ICT), cities may be made smarter by embedding ICT intotheir infrastructure. By smarter, we mean that the city operation will be more efficient, cost-effective,energy-saving, be more connected, more secure, and more environmentally friendly. As such, a smartcity is typically defined as a city that has a strong integration with ICT in all its components, includingits physical components, social components, and business components [1,2].

关键词： smart typically Smart

InSAR-derived surface deformation characteristics and mining subsidence parameters in mountain coal mines

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Journal of Mountain Science 2024年第9期21卷 3139-3156页

作者： jiang Xiaowei SHI wenbing LIANG Feng GUI Jingjing LI Jiawei Key Laboratory of Karst Georesources and Environment Ministry of EducationGuizhou UniversityGuiyang 550025China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China Mountain Geohazard Prevention R&D Center of Guizhou Province Guiyang 550025China

Mining-induced surface deformation disrupts ecological balance and impedes economic *** study employs SBAS-InSAR with 107-view of ascending and descending SAR data from Sentinel-1,spanning February 2017 to September 2020,to monitor surface deformation in the Fa’er Coal Mine,Guizhou *** on the surface deformation time series reveals the relationship between underground mining and surface *** geological conditions,mining activities,duration,and ranges,the study determines surface movement parameters for the coal *** asserts that mining depth significantly influences surface movement parameters in mountainous mining *** mining depth elevates the strike movement angle on the deeper side of the burial depth by 22.84°,while decreasing by 7.74°on the shallower *** movement angles decrease by 4.06°,while downhill movement angles increase by 15.71°.This emphasizes the technology's suitability for local mining design,which lays the groundwork for resource development,disaster prevention,and ecological protection in analogous contexts.

关键词： Time-series InSAR Surface deformation Subsurface mining Mining subsidence

Design and Analysis of a Vapor Cooled Shield of Cryogenic Propellants Storage System

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上海航天（中英文） 2020年第S1期37卷 25-33页

作者： SUN Peijie jiang wenbing HUANG Yonghua LI Peng XU Anyi BAO Yiying BU Shaohua Aerospace System Engineering Shanghai Shanghai 201108China Shanghai Cryogenic Technology and Test Application Service Platform Shanghai Jiao Tong UniversityShanghai 201108China

Vapor-cooled shield(VCS)has been considered as an effective technology to intercept heat leakage from the environment into the cryogenic tanks. This paper shows a 3 D model to investigate the temperature distribution on VCS with H2,and also conforms to the fact of temperature uniformity assumption in literature. The shield wall thickness is analyzed for series-type VCS and parallel-type VCS to clarify the existing temperature gradient on VCS and the way it influences the insulation performance of multilayer insulation(MLI). Computational fluid dynamics(CFD) simulations are performed on different VCS types,and the simulation results showed that the temperature gradient between series-type VCS and parallel-type VCS is about 2 K with 2 mm thickness. Therefore,according to the VCS configuration design,there is no obvious influence of temperature distribution between both tseries-type VCS and parallel-type VCS. The effects of VCS position and warm boundary temperature(heat flux) on the thermal insulation performance were investigated for LH2 and LO2 tanks. The temperature profiles within the insulation material with or without VCS are compared. In addition,the contributions from the VCS to reduce the heat flux into the tank,especially to the LH2 tank,are evaluated. The simulation results indicate that the temperature gradient of VCS increases as the wall thickness decreases,the maximum temperature gradient is less than 1.5 K and can be regarded as the isothermal surface. Besides,the heat flux through MLI increases as the temperature gradient of VCS increases,but with a very small growth rate. Therefore,the influent of the VCS temperature gradient could be ignored on the adiabatic property of MLI.

关键词： insulation gradient distribution