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Comprehensive Evaluation Method for Traffic Flow Data Quality based on Grey Correlation Analysis and Particle Swarm Optimization

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 106-128页

作者： wei ba baojun Chen Qi Li School of Automation and Electrical Engineering Dalian Jiaotong UniversityDalian116028China Faculty of Electronic Information and Electrical Engineering Dalian University of TechnologyDalian116023China

Nowadays,data are more and more used for intelligent modeling and prediction,and the comprehensive evaluation of data quality is getting more and more attention as a necessary means to measure whether the data are usable or ***,the comprehensive evaluation method of data quality mostly contains the subjective factors of the evaluator,so how to comprehensively and objectively evaluate the data has become a bottleneck that needs to be solved in the research of comprehensive evaluation *** order to evaluate the data more comprehensively,objectively and differentially,a novel comprehensive evaluation method based on particle swarm optimization(PSO)and grey correlation analysis(GCA)is presented in this *** first,an improved GCA evaluation model based on the technique for order preference by similarity to an ideal solution(TOPSIS)is ***,an objective function model of maximum difference of the comprehensive evaluation values is built,and the PSO algorithm is used to optimize the weights of the improved GCA evaluation model based on the objective function ***,the performance of the proposed method is investigated through parameter analysis.A performance comparison of traffic flow data is carried out,and the simulation results show that the maximum average difference between the evaluation results and its mean value(MDR)of the proposed comprehensive evaluation method is 33.24%higher than that of TOPSIS-GCA,and 6.86%higher than that of *** proposed method has better differentiation than other methods,which means that it objectively and comprehensively evaluates the data from both the relevance and differentiation of the data,and the results more effectively reflect the differences in data quality,which will provide more effective data support for intelligent modeling,prediction and other applications.

关键词： Data quality comprehensive evaluation particle swarm optimization grey correlation analysis traffic flow data

An auditory periphery model for improving narrow-band noise recognition rate of underwater targets

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Chinese Journal of Acoustics 2018年第3期37卷 325-340页

作者： LIN Zhengqing QIU Mengran ba wei Science and Technology on Underwater Test and Control Laboratory

The recognition rate of the auditory periphery features decreases when the model is used to identify underwater targets in practice. To solve this problem, an improved method based on Gammatone filter bank is proposed. Firstly, after the reason of the decreasing of the recognition results is analyzed, the mechanism of multichannel data acquisition in acoustic engineering may narrow down signal frequency range, which leads to time-frequency features distortion. Secondly, the Gammatone filter bank is implemented to simulate frequency decom- position characteristics of human ear basilar membrane. Since the class information of the underwater noise signal is mostly contained in low frequency range, the auditory features of the conventional model are interpolated and the channel number of the filter bank and the central frequency of each frequency band are adjusted accordingly to obtain a 27-dimensional feature vector of the narrow-band target signal. The adjusted model may reflect the target＇s time- frequency feature more precisely. Finally, the performance of the auditory features is tested by a Neural Network classifier. The experiment results show that the modified auditory model is more effective than the conventional ones. The major information contained in broadband signals is reserved and the classification ability for real targets is further enhanced. The recog- nition results are increased from 82.59% to 88.80%. The modified auditory features effectively improve the recognition rate for underwater target radiated noise signals.

关键词： An auditory periphery model for improving narrow-band noise recognition rate of underwater targets

POLYMERIZATION OF ACRYLONITRILE WITH ORGANOLANTHANIDES AS SINGLE-COMPONENT CATALYSTS

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Chinese Journal of Polymer Science 2001年第1期19卷 89-91页

作者： Lai-qiang Ying Xiao-wei ba Yu-ying Zhao Gang Li Tao Tang Ying-tai Jin Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022Chin

Ind_(2)Y(μ-Et)_(2)AlEt_(2) and Ind_(2)LnN(i-Pr)_(2)(Ln=Y,Yb)were used as a single-component catalyst for the polymerization of acrylonitrile(AN)*** regularity of polymerization of AN and stereoregularity of polyacrylonitrile(PAN)were also studied in both *** catalysts can produce PAN with molecular weight from 10,000 to 30,*** addition,the catalytic activity and molecular weights were increased by the addition of PhONa.

关键词： acrylonitrile organolanthanide polymerization

POLYMERIZATION OF METHYL METHACRYLATE WITH ORGANOLANTHANIDES AS SINGLE-COMPONENT CATALYSTS

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Chinese Journal of Polymer Science 2001年第1期19卷 85-87页

作者： Lai-qiang Ying Xiao-wei ba Yu-ying Zhao Gang Li Tao Tang Ying-tai Jin Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

It was first found that Ind(2)Y(mu -Et)(2)AlEt2 and Ind(2)LnN(i-Pr)(2) (Ln = Y, Yb) exhibit extremely high catalytic activity in the polymerization of methyl methacrylate. The reactions can be carried out over a quite broad range of polymerization temperatures from -30 to 50 degreesC. PMMA with high molecular weight (7.8 x 10(-5)) and high isotacticity (94%) can be obtained by using Ind(2)Y(mu -Et)(2)AlEt2, and narrow molecular weight distribution (M-w/M-n < 1.5) can be obtained by using Ind(2)LnN(i-Pr)(2) (Ln = Y, Yb).

关键词： organolanthanide MMA polymerization

Generation of human neutralizing monoclonal antibodies against the 2009 pandemic H 1N 1 virus from peripheral blood memory B lymphocytes

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Cellular & Molecular Immunology 2013年第5期10卷 403-412页

作者： Hao Wang Chi Ma Yanlai Lu Xu Ji Yongsheng Pang Fang Hua Lianxian Cui Denian ba wei He Department of Immunology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences and School of Basic Medicine Peking UnionMedical College State Key Laboratory of Medical Molecular Biology Beijing China

The 2009 H 1N 1 influenza pandemic demonstrated the significance of a global health threat to human beings. Although pandemic H 1N 1 vaccines have been rapidly developed, passive serotherapy may offer superior immediate protection against infections in children, the elderly and immune-compromised patients during an influenza pandemic. Here, we applied a novel strategy based on Epstein-barr virus （EBV）-immortalized peripheral blood memory B cells to screen high viral neutralizing monoclonal antibodies （MAbs） from individuals vaccinated with the 2009 pandemic H1N1 vaccine PANFLU.1. Through a massive screen of 13 090 immortalized memory B-cell clones from three selected vaccinees, seven MAbs were identified with both high viral neutralizing capacities and hemagglutination inhibition （HAl） activities against the 2009 pandemic H 1N 1 viruses. These MAbs may have important clinical implications for passive serotherapy treatments of infected patients with severe respiratory syndrome, especially children, the elderly and immunodeficient individuals. Our successful strategy for generating high-affinity MAbs from EBV-immortalized peripheral blood memory B ceils may also be applicable to other infectious or autoimmune diseases.

关键词： Epstein-barr virus hemagglutinin memory B cells neutralizing monoclonal antibody 2009 pandemicinfluenza HIN1 virus

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两种改进的EDF软实时动态调度算法

计算机学报 2011年第5期34卷 943-950页

作者：李琦巴巍大连理工大学电子与信息工程学院辽宁大连116024 大连测控技术研究所辽宁大连116013

软实时系统中,任务的随意抢占浪费了CPU资源,过多的任务丢失降低了系统的调度性能.文章引入"动态模糊阈值"概念,提出了两种新的类似EDF调度的模糊阈值调度算法.两种算法在任务执行过程中,分别通过缩短和延长当前任务截止期至动态模糊阈... 详细信息

软实时系统中,任务的随意抢占浪费了CPU资源,过多的任务丢失降低了系统的调度性能.文章引入"动态模糊阈值"概念,提出了两种新的类似EDF调度的模糊阈值调度算法.两种算法在任务执行过程中,分别通过缩短和延长当前任务截止期至动态模糊阈值的方法节约资源、提高任务完成率.给出模糊阈值的临界值计算公式,分析算法的可调度性,进行仿真与性能分析比较.结果表明,与EDF调度算法比较,两种算法有效地提高了重要任务的完成率,当截止期被延长时,任务的错失率明显降低,当截止期被缩短时,任务间的切换次数大大减少.因此,新算法提高了CPU的利用率,改善了系统的实时性能.

关键词： EDF 抢占阈值语言模糊集模糊规则

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基于流网分析的通流计算冷却模型

工程热物理学报 2018年第11期39卷 2404-2411页

作者：巴威任晓栋清华大学热能工程系热科学与动力工程教育部重点实验室北京100084

伴随着复合冷却技术的广泛应用,冷却透平中主流流动和传热过程的复杂耦合现象日趋显著,有必要在初步气动设计阶段充分考虑冷却对主流气动布局的影响。本文基于流网分析提出了适用于气热耦合通流方法的冷却模型,该模型可针对透平叶片进... 详细信息

伴随着复合冷却技术的广泛应用,冷却透平中主流流动和传热过程的复杂耦合现象日趋显著,有必要在初步气动设计阶段充分考虑冷却对主流气动布局的影响。本文基于流网分析提出了适用于气热耦合通流方法的冷却模型,该模型可针对透平叶片进行快速流热分析,并结合主流气动参数计算结果预测掺混冷气流量分布及掺混损失分布。本文采用该冷却模型对C3X叶型进行了气热耦合通流分析,叶片表面温度分布计算值与实验结果符合良好,说明该冷却模型可应用于气热耦合通流方法,为透平初步气动设计及冷却设计提供一定的借鉴意义。

关键词：气热耦合通流方法流网分析冷却模型

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高温透平气热耦合通流设计与分析

工程热物理学报 2016年第5期37卷 969-974页

作者：巴威李海波顾春伟清华大学热能工程系热科学与动力工程教育部重点实验室北京100084

透平冷却技术的广泛应用带来了冷却透平中主流流动和传热过程的复杂耦合问题。传统透平设计过程中,通常将气动设计与冷却设计分开进行,因而难以充分考虑二者之间的相互影响。本文在某高温轴流透平的初步设计中采用了一种气热耦合的通流... 详细信息

透平冷却技术的广泛应用带来了冷却透平中主流流动和传热过程的复杂耦合问题。传统透平设计过程中,通常将气动设计与冷却设计分开进行,因而难以充分考虑二者之间的相互影响。本文在某高温轴流透平的初步设计中采用了一种气热耦合的通流设计方法,该方法在传统通流计算的基础上引入了冷却计算模型,并以通流计算得到的主流流场参数作为传热计算的边界条件,由此求得透平所需冷气量及主流流场参数。本文采用ANSYS CFX对设计透平进行了性能分析,结果表明该气热耦合通流设计方法可以在透平初步设计阶段提供较大的借鉴意义。

关键词：气热耦合通流方法冷却模型数值计算

《仓央嘉措诗歌》汉语译介中的国家认同与现代转换

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学术探索 2015年第7期 95-99页

作者：巴微陕西师范大学文学院

现代国家是在民族认同的基础上形成的,因此在现代性视域中考察少数民族文学在汉语文化圈中的传播状况具有国家认同与现代转换的双重意义。本文通过梳理《仓央嘉措诗歌》的汉语译介,概括主流文化在对少数民族文学吸纳整合过程中所表现出... 详细信息

现代国家是在民族认同的基础上形成的,因此在现代性视域中考察少数民族文学在汉语文化圈中的传播状况具有国家认同与现代转换的双重意义。本文通过梳理《仓央嘉措诗歌》的汉语译介,概括主流文化在对少数民族文学吸纳整合过程中所表现出来的阶段性特点。在全球化大趋势下,通过文化手段加强民族认同对建构"多元一体"文化格局,提升国家凝聚力具有重要的现实意义和深远的历史意义。

关键词：《仓央嘉措诗歌》民族认同国家认同现代转换