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Transport of velocity alignment particles in random obstacles

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Chinese Physics B 2018年第8期27卷 164-169页

作者： wei-jing zhu Xiao-qun Huang Bao-quan Ail Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal University Basic Teaching Department Neusoft Institute Guangdong

We numerically investigate the trapping behaviors of aligning particles in two-dimensional （2D） random obstacles system. Under the circumstances of the effective diffusion rate and the average velocity tend to zero, particles are in trapped state. In this paper, we examine how the system parameters affect the trapping behaviors. At the large self-propelled speed, the ability of nematic particles escape from trapping state is enhancing rapidly, in the meanwhile the polar and free particles are still in trapped state. For the small rotation diffusion coefficient, the polar particles circle around （like vortices） the obstacles and here particles are in trapped state. Interestingly, only the partial nematic particles are trapped in the confined direction and additional particles remain flowing. In the free case, the disorder particle-particle collisions impede the motion in each other＇s directions, leading the free particles to be trapped. At the large rotation diffusion coefficient, the ordered motion of aligning particles disappear, particles fill the sample evenly and are self-trapped around obstacles. As the particles approach the trapping density due to the crowding effect the particles become so dense that they impede each other＇s motion. With the increasing number of obstacles, the trajectories of particles are blocked by obstacles, which obstruct the movement of particles. It is worth noting that when the number of the obstacles are large enough, once the particles are trapped, the system is permanently absorbed into a trapped state.

关键词： Brownian motion self-propelled particles stochastic processes

RAFT Miniemulsion Polymerization of MMA with Cumyl Dithiobenzoate as Chain Transfer Agent

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Chinese Chemical Letters 2006年第9期17卷 1247-1250页

作者： Tian Ying GUO Dong Lin TANG jing wei zhu Mou Dao SONG Bang Hua ZHANG Key Laboratory of Functional Polymer Materials Ministry of Education Institute of Polymer Chemistry Nankai University Tianjin 300071

Reversible addition-fragmentation transfer （RAPT） miniemulsion polymerizations for PMMA with cumyl dithiobenzoate （CDB） as a chain transfer agent （CTA） has been carried out. Higher temperature made the polymeriz... 详细信息

关键词： RAFT polymerization miniemulsion chain transfer agent cumyl dithiobenzoate.

Data-driven production optimization using particle swarm algorithm based on the ensemble-learning proxy model

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Petroleum Science 2023年第5期20卷 2951-2966页

作者： Shu-Yi Du Xiang-Guo Zhao Chi-Yu Xie jing-wei zhu Jiu-Long Wang Jiao-Sheng Yang Hong-Qing Song School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China National&Local Joint Engineering Lab for Big Data Analysis and Computer Technology Beijing100190China CNPC International Hong Kong Limited Abu DhabiUnited Arab Emirates Computer Network Information Center Chinese Academy of SciencesBeijing065007China China National Petroleum Corporation Langfang065007HebeiChina

Production optimization is of significance for carbonate reservoirs,directly affecting the sustainability and profitability of reservoir *** physics-based numerical simulations suffer from insufficient calculation accuracy and excessive time consumption when performing production *** establish an ensemble proxy-model-assisted optimization framework combining the Bayesian random forest(BRF)with the particle swarm optimization algorithm(PSO).The BRF method is implemented to construct a proxy model of the injectioneproduction system that can accurately predict the dynamic parameters of producers based on injection data and production *** the help of proxy model,PSO is applied to search the optimal injection pattern integrating Pareto front *** experimental testing,the proxy model not only boasts higher prediction accuracy compared to deep learning,but it also requires 8 times less time for *** addition,the injection mode adjusted by the PSO algorithm can effectively reduce the gaseoil ratio and increase the oil production by more than 10% for carbonate *** proposed proxy-model-assisted optimization protocol brings new perspectives on the multi-objective optimization problems in the petroleum industry,which can provide more options for the project decision-makers to balance the oil production and the gaseoil ratio considering physical and operational constraints.

关键词： Production optimization Random forest The Bayesian algorithm Ensemble learning Particle swarm optimization

Ratchet transport of overdamped particles in superimposed driven lattices

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Chinese Physics B 2019年第4期28卷 108-112页

作者： Shu-Na Huang wei-jing zhu Xiao-Qun Huang Bao-Quan Ai Feng-Guo Li Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal University

Ratchet transport of overdamped particles is investigated in superimposed driven lattices using Langevin dynamics simulations. It is found that noise can strongly affect the transport of the particles. When lattices driving dominates the transport, the noise acts as a disturbance of the directed transport and slows down the average velocity of the *** the driving phase has less impact on particle transport, Gaussian white noise can play a positive role. By simply modulating these two parameters, we can control efficiency and the direction of the directed currents.

关键词： Gaussian white noise superimposed driven lattices rectification

Endovascular treatment of acute proximal deep venous thrombosis secondary to iliac vein compression syndrome： a novel technique for thrombus removal

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Chinese Medical Journal 2013年第16期126卷 3184-3186页

作者： WANG Yi-ping ZHANG Xi-quan YU wei-na HAO Bin REN Ke-wei PAN jing-jing zhu Liang Department of Interventional Vascular the 148th Hospital of ChinesePeople's Liberation Army Zibo Shandong 255300 China

Iliac vein compression syndrome （IVCS）,also known as May-Thurner syndrome or Cockett syndrome,is caused by compression of the left common iliac vein between the right common iliac artery and the vertebrae.A recent imaging study have demonstrated that at least a 25%compression of the left iliac vein at the arterial crossover point may be present in 66% of the asymptomatic patient population.1 With the development of interventional technique,endovascular management as a less invasive means is becoming the first-line treatment,which can not only treat the thrombosis but also correct the venous anatomic abnormalities.2 In this study,we described a novel technique combining percutaneous aspiration thrombectomy （PAT） with Fogarty catheter thrombectomy （FCT） as the thrombus removal therapy without femoral venotomy in patients with acute deep vein thrombosis （DVT） due to IVCS and evaluated its technical feasibility and short-term outcomes.

关键词： iliac vein compression syndrome deep venous thrombosis percutaneous aspiration thrombectomy fogarty catheter thrombectomy

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长尾分布的网络作品版权管理研究

图书馆论坛 2015年第11期35卷 34-40页

作者：韦景竹卢俊中山大学资讯管理学院广东热带医学杂志社

文章以长尾理论为基础,结合起点中文网的运营进行案例分析,对网络作品的长尾分布形态进行论证。发现人们需求的多样性使网络作品在客观分布和点击使用方面呈现长尾分布;指出长尾网络作品与畅销或者流行的网络作品版权管理的不同之处,提... 详细信息

文章以长尾理论为基础,结合起点中文网的运营进行案例分析,对网络作品的长尾分布形态进行论证。发现人们需求的多样性使网络作品在客观分布和点击使用方面呈现长尾分布;指出长尾网络作品与畅销或者流行的网络作品版权管理的不同之处,提出加强长尾分布网络作品的版权管理、促进数字文化发展的途径。

关键词：长尾理论网络作品版权

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图书馆版权侵权案例研究

图书馆论坛 2015年第11期35卷 27-33页

作者：韦景竹董宝蕾中山大学资讯管理学院江苏省连云港市连云区档案局

文章以近10年我国图书馆知识产权案件的已决判决书为分析样本,从诉讼主体、诉讼原由、诉讼标的、案件焦点、举证责任、法律依据、判决结果等角度分析图书馆知识产权案件的共性和差异性,探讨案件的特点。结合专家访谈,分析我国图书馆所... 详细信息

文章以近10年我国图书馆知识产权案件的已决判决书为分析样本,从诉讼主体、诉讼原由、诉讼标的、案件焦点、举证责任、法律依据、判决结果等角度分析图书馆知识产权案件的共性和差异性,探讨案件的特点。结合专家访谈,分析我国图书馆所处的知识产权环境和突出的知识产权问题,提出应对措施和对未来著作权法的期许。

关键词：公共数字文化图书馆版权案例信息网络传播权

公共文化机构数字资源建设版权管理策略研究——以广州市的图书馆、博物馆和文化馆为例

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图书馆论坛 2015年第11期35卷 19-26页

作者：韦景竹李秋月中山大学资讯管理学院商洛学院图书馆

文章对广州市的图书馆、博物馆和文化馆三类公共文化机构数字资源建设版权情况进行网络调研和访谈,结合我国法律法规和政策现状,探讨公共文化机构数字资源建设的版权策略;从法律法规、版权授权模式以及公共文化版权行政管理三方面提出... 详细信息

文章对广州市的图书馆、博物馆和文化馆三类公共文化机构数字资源建设版权情况进行网络调研和访谈,结合我国法律法规和政策现状,探讨公共文化机构数字资源建设的版权策略;从法律法规、版权授权模式以及公共文化版权行政管理三方面提出改进建议。

关键词：公共文化机构数字资源建设版权图书馆博物馆文化馆

Magnetic resonance imaging evaluation and nuclear receptor binding SET domain protein 1 mutation in the Sotos syndrome with attention-deficit/hyperactivity disorder

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World Journal of Clinical Cases 2025年第2期13卷 5-9页

作者： wei zhu Shanghai XiRong Information Science and Technology Co. LtdNational Science and Technology ParkSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China

Sotos syndrome is characterized by overgrowth features and is caused by alterations in the nuclear receptor binding SET domain protein 1 ***/hyperactivity disorder(ADHD)is considered a neurodevelopment and psychiatric disorder in *** characteristics and clinical presentation could play an important role in the diagnosis of Sotos syndrome and *** resonance imaging(MRI)has been used to assess medical images in Sotos syndrome and *** images process is considered to display in MRI while wavelet fusion has been used to integrate distinct images for achieving more complete information in single image in this *** the future,genetic mechanisms and artificial intelligence related to medical images could be used in the clinical diagnosis of Sotos syndrome and ADHD.

关键词： Sotos syndrome Attention-deficit/hyperactivity disorder Genetic mutation Magnetic resonance imaging Wavelet fusion