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考虑选型的混合储能平抑海上风电波动的容量优化研究

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武汉大学学报（工学版） 2024年第6期57卷 782-791页

作者：陆秋瑜杨银国陈俊生刘洋刘念曹飞李光耀广东电网有限责任公司电力调度控制中心广东广州518046 北京四方继保工程技术有限公司北京100086 武汉大学电气与自动化学院湖北武汉430072

为减少海上风电的间歇性和波动性对电网的冲击,常引入储能装置平抑其输出功率波动。考虑到采用固定混合储能组合进行容量优化研究具有局限性,提出一种考虑选型的混合储能容量配置方法,采用自回归滑动平均模型与基于概率距离的场景削减... 详细信息

为减少海上风电的间歇性和波动性对电网的冲击,常引入储能装置平抑其输出功率波动。考虑到采用固定混合储能组合进行容量优化研究具有局限性,提出一种考虑选型的混合储能容量配置方法,采用自回归滑动平均模型与基于概率距离的场景削减法处理海上风电的不确定性,提出一种基于小波包分解的混合储能功率分配策略;采用双循环模型将分配策略与储能选型相结合,建立储能系统经济性优化模型,以储能全寿命周期成本最低为目标,完成储能的选型和容量最优配置。以国内某海上风电场实测数据为例进行仿真,得出全钒液流电池和超级电容组成的混合储能系统为最优组合方案,且两者能够很好地发挥优势互补作用。

关键词：海上风电平抑波动储能选型混合储能容量优化

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Altered expression of metabotropic glutamate receptor 1 alpha after acute diffuse brain injury Effect of the competitive antagonist 1-aminoindan-1, 5-dicarboxylic acid

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Neural Regeneration Research 2012年第2期7卷 119-124页

作者： fei cao Mantao Chen Gu Li Ke Ye Xin Huang Xiujue Zheng Department of Neurosurgery First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China Institute of Brain Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China

The diffuse brain injury model was conducted in Sprague-Dawley rats, according to Marmarou＇s free-fall attack. The water content in brain tissue, expression of metabotropic glutamate receptor la mRNA and protein were significantly increased after injury, reached a peak at 24 hours, and then gradually decreased. After treatment with the competitive antagonist of metabotropic glutamate receptor la, （RS）-l-aminoindan-1,5-dicarboxylic acid, the water content of brain tissues decreased between 12-72 hours after injury, and neurological behaviors improved at 2 weeks. These experimental findings suggest that the 1-aminoindan-1, 5-dicarboxylic acid may result in marked neuroprotection against diffuse brain injury.

关键词： diffuse brain injury in vivo animal model metabotropic glutamate receptor 1 alpha 1-aminoindan-1,5-dicarboxylic acid

Expression of metabotropic glutamate receptor 1a in a rat cortical neuronal model of in vitro mechanical injury and the effects of its competitive antagonist (RS)-1-aminoindan-1,5-dicarboxylic acid

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Neural Regeneration Research 2011年第28期6卷 2176-2182页

作者： fei cao Mantao Chen Xiujue Zheng Gu Li Liang Wen Xiaofeng Yang Department of Neurosurgery First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China Institute of Brain Medicine Zhejiang University Hangzhou 310003 Zhejiang Province China

The present study established a rat cortical neuronal model of in vitro mechanical injury. At 30 minutes after injury, the survival rate of the injured cortical neurons was decreased compared with normal neurons, and was gradually decreased with aggravated degree of injury. Reverse transcription-polymerase chain reaction results showed that at 1 hour after injury, there was increased expression of metabotropic glutamate receptor la in cortical neurons. Immunohistochemical staining results showed that at 30 minutes after injury, the number of metabotropic glutamate receptor 1a-positive cells increased compared with normal neurons. At 12 hours after injury, lactate dehydrogenase activity in the （RS）-l-aminoindan-1, 5-dicarboxylic acid （AIDA）-treated injury neurons was si[jnificantly decreased than that in the pure injury group. At 1 hour after injury, intracellular free Ca＂＋ concentration was markedly decreased in the AIDA-treated injury neurons than that in the pure injury neurons. These findings suggest that after mechanical injury to cortical neurons, metabotropic glutamate receptor la expression increased. The resulting increase in intracellular free Ca2＋ concentration was blocked by AIDA, indicating that AIDA exhibits neuroprotective effects after mechanical injury.

关键词： brain injury mechanical injury model in vitro metabotropic glutamate receptor la (RS)-l-aminoindan-1,5-dicarboxylic acid neural regeneration

Impacts of pancreatic exocrine insufficiency on gut microbiota

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 271-279页

作者： Yulin GUO Feng cao fei LI Department of General Surgery Xuanwu Hospital of Capital Medical UniversityBeijing 100053China Acute Pancreatitis Clinical Center of Capital Medical University Beijing 100053China

Pancreatic exocrine insufficiency(PEI)can be induced by various kinds of diseases,including chronic pancreatitis,acute pancreatitis,and *** main pathogenetic mechanism of PEI involves the decline of trypsin synthesis,disorder of pancreatic fluid flow,and imbalance of secretion *** studies have shown that PEI could induce gut bacterial overgrowth and dysbiosis,with the abundance of Lactobacillus and Bifidobacterium increasing the most,which could be partially reversed by pancreatic enzyme replacement *** studies have also confirmed the association between PEI and the dysbiosis of gut *** exocrine secretions and changes in duodenal p H as well as bile salt malabsorption brought about by PEI may affect and shape the abundance and composition of gut *** turn,the gut microbiota may impact the pancreatic exocrine acinus through potential bidirectional *** forward,more and higher-quality studies are needed that focus on the mechanism underlying the impact of PEI on the gut microbiota.

关键词： Pancreatic exocrine insufficiency Gut microbiota Gut microbiome Pancreatic enzyme replacement therapy

A Parallel Markov Cerebrovascular Segmentation Algorithm Based on Statistical Model

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Journal of Computer Science & Technology 2016年第2期31卷 400-416页

作者： Rong-fei cao Xing-Ce Wang Zhong-Ke Wu Ming-Quan Zhou Xin-Yu Liu Department of Information Science and Technology Beijing Normal University Beijing 100875 China Engineering Research Center of Virtual Reality and Applications Ministry of Education Beijing 100875 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

For segmenting cerebral blood vessels from the time-of-flight magnetic resonance angiography （TOF-MRA） images accurately, we propose a parallel segmentation algorithm based on statistical model with Markov random field （MRF）. Firstly, we improve traditional non-local means filter with patch-based Fourier transformation to preprocess the TOF-MRA images. In this step, we mainly utilize the sparseness and self-similarity of the MRA brain images sequence. Secondly, we add the MRF information to the finite mixture mode （FMM） to fit the intensity distribution of medical images. We make use of the MRF in image sequence to estimate the proportion of cerebral tissues. Finally, we choose the particle swarm optimization （PSO） algorithm to parallelize the parameter estimation of FMM. A large number of experiments verify the high accuracy and robustness of our approach especially for narrow vessels. The work will offer significant assistance for physicians on the prevention and diagnosis of cerebrovascular diseases.

关键词： cerebrovascular segmentation non-local means filtering Markov random field particle swarm optimization algorithm

基于广义天气分类的ICEEMDAN-LSTM网络光伏发电功率短期预测

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综合智慧能源 2024年第9期46卷 53-60页

作者：袁俊球王迪谢小锋张茜颖曹尚曹飞张经炜常州金坛金能电力有限公司江苏常州213200 河海大学机电工程学院江苏常州213200

针对光伏发电功率受天气影响大、随机波动性强的问题,提出基于广义天气分类和改进自适应噪声完备集合经验模态分解(ICEEMDAN)长短期记忆(LSTM)网络的短期光伏发电功率预测方法。基于历史辐照度数据,采用K-means++聚类算法对广义天气类... 详细信息

针对光伏发电功率受天气影响大、随机波动性强的问题,提出基于广义天气分类和改进自适应噪声完备集合经验模态分解(ICEEMDAN)长短期记忆(LSTM)网络的短期光伏发电功率预测方法。基于历史辐照度数据,采用K-means++聚类算法对广义天气类型进行划分,将天气类型分为3类,再通过ICEEMDAN方法将光伏发电数据分解为若干不同频率的本征模态和残差分量,以降低原始发电数据的非平稳性;在不同天气类型下,建立了不同模态序列分量下的LSTM预测模型;使用训练好的LSTM模型对各分解的子序列模态特征分量进行多维预测,并将各层模态预测序列融合成最终的预测结果。试验结果表明,所构建的ICEEMDAN-LSTM混合模型相较于常规短期光伏发电功率预测模型,具有更高的预测精度。

关键词：光伏系统功率预测广义天气分类自适应噪声完备集合经验模态分解长短期记忆网络

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Modeling motion and growth of multiple dendrites during solidification based on vector-valued phase field and two-phase flow models

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Journal of Materials Science & Technology 2020年第23期58卷 171-187页

作者： Jian-kun Ren Yun Chen Yan-fei cao Ming-yue Sun Bin Xu Dian-zhong Li Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Movement and growth of dendrites are common phenomena during *** numerically investigate these phenomena,two-phase flow model is employed to formulate the FSI(fluid-structure interaction)problem during dendritic *** this model,solid is assumed to have huge viscosity to maintain its own shape and an exponential expression is constructed to describe variable viscosity across s-l(solid-liquid)*** an effective preconditioner for saddle point structure,we build a N-S(Navier-Stokes)solver robust to tremendous viscosity ratio(as large as 10^(10))between solid and *** solidification is computed by vector-valued phase field model,which is computationally convenient to handle contact between *** of dendrites are updated by solving advection *** change due to dendrite's rotation has been considered as *** is accelerated by two-level time stepping scheme,adaptive mesh refinement,and parallel *** and growth of a single dendrite and multiple dendrites in Al-Cu alloy were simulated,showing the availability of the provided model to handle anisotropic growth,motion and impingement of *** study lays foundation to simulate solidification coupled with deformation in the future.

关键词： Phase field Solidification Two-phase flow Dendrite's motion Variable viscosity

Broadband and sensitive two-dimensional halide perovskite photodetector for full-spectrum underwater optical communication

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Nano Research 2021年第4期14卷 1210-1217页

作者： Dejian Yu fei cao Yu Gu Zeyao Han Jiaxin Liu Bo Huang Xiaobao Xu Haibo Zeng Institute of Optoelectronics&Nanomaterials MIIT Key Laboratory of Advanced Display Materials and DevicesSchool of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China

Full-spectrum underwater optical communication(UOC)is of great significance for major strategic needs including resource development,scientific exploration,and homeland *** the core of the full-spectrum UOC system,photodetectors(PDs)are plagued by stringent requirements including a broadband response,intrinsic water resistance,and a high *** this work,two-dimensional(2D)halide perovskites(HPs)and corresponding PDs are constructed by stearamine(SA),representing the rarely explored long-chain aliphatic amine series,to own waterproofness,ultralow noise,and superior optoelectronic performance,which consequently enable a high suitability for *** dimensionality and composition modulations to extend the absorption onset down to 1.5 eV,a broadband response covering the entire transmission window of water(>1.55 eV)for full-spectrum UOC can be ***,featuring a high responsivity of 3.27 A·W^(-1),a peak external quantum efficiency(EQE)of 630%,fast rise/decay times of 0.35 ms/0.54 ms,a superior detectivity up to 1.35×10^(12)Jones and the capability to distinguish various waveforms and light intensities,the PDs present sensitive and persistent photoresponse *** a result,proof-of-concept wireless transmission of ASCII codes in water is demonstrated.

关键词： two-dimensional(2D)halide perovskite photodetector water stability broadband photoresponse underwater optical communication

The role of AGFA high-energy CR in the calibration and quality con-trol of multileaf collimators(MLC)

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Nuclear Science and Techniques 2007年第3期18卷 145-149页

作者： LI Zhaobin XIONG fei HUANG Guofeng cao Zheng JIANG Ruiyao FU Shen Department of Radiation Oncology the No.6 Hospital of Shanghai Jiaotong University Shanghai 200233 China

Linear accelerators equipped with multileaf collimators (MLC) are becoming more common and are widely used in the intensity-modulated radiotherapy (IMRT). There is an imperative need to ensure the commissioning specification of the linear accelerators for the sake of quality assurance (QA) and quality control (QC). This paper is aimed to investigate the role of AGFA high-energy CR (Computed Radiography) in calibrating dynamic multileaf col- limators and evaluating the accuracy of the leaf position. The result shows that AGFA high-energy CR can easily and conveniently be used to calibrate MLC and verify its position. Hence, the application of AGFA high-energy CR is proved to be an accurate and time-saving method for routine MLC QC, especially when MLC calibration adjustments are required.

关键词：高能量CR MLC校准质量控制放射疗法