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社区医生对抗生素知信行及关联因素的多重对应分析

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中国预防医学杂志 2016年第9期17卷 646-650页

作者：陆一鸣鲁培俊钱国宏裴泓波甘肃省健康教育所甘肃兰州730020 兰州大学公共卫生学院

目的了解社区医生对抗生素的临床用药知、信、行及其关联因素,为开展基层医务人员合理使用抗生素的健康教育提供依据。方法在甘肃省6个区（县）社区卫生服务中心/乡镇卫生院,随机分层抽取临床医生,通过匿名自填问卷调查收集资料。运用Ep... 详细信息

目的了解社区医生对抗生素的临床用药知、信、行及其关联因素,为开展基层医务人员合理使用抗生素的健康教育提供依据。方法在甘肃省6个区（县）社区卫生服务中心/乡镇卫生院,随机分层抽取临床医生,通过匿名自填问卷调查收集资料。运用EpiData 3.1软件建立数据库,录入、核查资料,并运用SAS 9.1软件进行统计分析。结果共发放调查问卷510份,收回有效问卷506份,有效率99.22%。20.55%（104/506）~38.34%（194/506）的社区医生对抗生素知识、态度及行为处于相对中、低水平[以得分P25（Q1）与P75（Q3）为界分高、中、低三水平]社区医生对知识得分的百分位数分布为：75.00分（Q1）、81.25分（Q2）、87.50分（Q3）;态度得分的百分位数分布为：72.00分（Q1）、80.00分（Q2）、84.00分（Q3）;行为得分的百分位数分布为：70.00分（Q1）、76.00分（Q2）、80.00分（Q3）。年龄、性别、学历、职称与抗生素知识无关联,知识与行为关联紧密,态度与行为之间关联关系不明显。城市社区医生抗生素合理应用知识水平、行为水平均较高。结论临床合理使用抗生素应该引起社区医生的高度重视;进一步的健康干预要着重强调提高农村地区社区医生合理使用抗生素的知识水平,从而促进基层临床抗生素合理用药行为的改善。

关键词：抗生素社区医生知识态度行为多重对应分析

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承插型盘扣式钢管支架在现浇箱梁中的应用

工程建设与设计 2018年第6期 159-160页

作者：韦新强吴阳露陆建培中交二航局第三工程有限公司江苏镇江212000

随着社会发展,现浇箱梁越来越多地运用于城际轨道建设中。然而现浇箱梁施工技术复杂、程序繁多,特别是现浇箱梁的支架搭设质量,不仅关系到箱梁的施工质量,更关系到箱梁的施工安全。论文结合青岛轨道交通13号线工程中承插型盘扣式钢管支... 详细信息

随着社会发展,现浇箱梁越来越多地运用于城际轨道建设中。然而现浇箱梁施工技术复杂、程序繁多,特别是现浇箱梁的支架搭设质量,不仅关系到箱梁的施工质量,更关系到箱梁的施工安全。论文结合青岛轨道交通13号线工程中承插型盘扣式钢管支架在现浇箱梁中的应用,详细阐述承插型盘扣式钢管支架的推广价值,以供参考。

关键词：城际轨道建设现浇箱梁承插型盘扣式钢管支架

Nonlinear dynamics of a classical rotating pendulum system with multiple excitations

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Chinese Physics B 2020年第11期29卷 230-243页

作者： Ning Han pei-pei lu Key Laboratory of Machine Learning and Computational Intelligence College of Mathematics and Information ScienceHebei UniversityBaoding 071002China

We report an attempt to reveal the nonlinear dynamic behavior of a classical rotating pendulum system subjected to combined excitations of constant force and periodic *** unperturbed system characterized by strong irrational nonlinearity bears significant similarities to the coupling of a simple pendulum and a smooth and discontinuous(SD)oscillator,especially the phase trajectory with coexistence of Duffing-type and pendulum-type homoclinic *** order to learn the effect of constant force on this pendulum system,all types of phase portraits are displayed by means of the Hamiltonian function with large constant excitation especially the transitions of complex singular closed *** sufficiently small perturbations of the viscous damping and constant excitation,the Melnikov method is used to analyze the global structure of the phase space and the feature of *** is shown,both theoretically and numerically,that this system undergoes a homoclinic bifurcation and then bifurcates a unique attracting rotating limit ***,the estimation of the chaotic threshold of the rotating pendulum system with multiple excitations is calculated and the predicted periodic and chaotic motions can be shown by applying numerical simulations.

关键词： rotating pendulum Melnikov method rotating limit cycle chaotic dynamics

IDENTIFYING INFluENTIAL SPREADERS IN ARTIFICIAL COMPLEX NETWORKS

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Journal of Systems Science & Complexity 2014年第4期27卷 650-665页

作者： WANG pei TIAN Chengeng lu Jun-an School of Mathematics and Information Sciences Henan University School of Mathematics and Statistics Wuhan University

A long-term common belief in complex networks is that,the most connected nodes are the most efficient ***,recent investigations on real-world complex networks show that the most influential spreaders are those with the highest fc-shell *** is well-known that,many real-world complex networks have scale free(SF),small world(SW) properties,therefore,identification of influential spreaders in general artificial SF,SW as well as random networks will be more *** research finds that,for artificial ER and SW networks,degree is more reliable than fc-shell in predicting the outcome of ***,for artificial SF networks,fc-shell is remarkably reliable than degree and betweeness,which indicate that the four recently investigated real-world networks[Kitsak M,Gallos L K,Havlin S,Liljeros F,Muchnik L,Stanley H E,Makse H A,Identification of influential spreaders in complex networks,***.,2010,6:888-893.]are more similar to scale free ***,the investigations also indicate us an optimal dissemination strategy in networks with scale free *** is,starting from moderate-degree-nodes will be ok and even more economical,since one can derive roughly similar outcome with starting from hubs.

关键词： Complex network influential spreader k-shell scale free small world.

A User-Friendly SSVEP-Based BCI Using Imperceptible Phase-Coded Flickers at 60Hz

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China Communications 2022年第2期19卷 1-14页

作者： lu Jiang Weihua pei Yijun Wang State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China Chinese Institute for Brain Research Beijing 102206China

A brain-computer interface(BCI)system based on steady-state visual evoked potentials(SSVEP)was developed by four-class phase-coded *** elicited by flickers at 60Hz,which is higher than the critical fusion frequency(CFF),were compared with those at 15Hz and *** components in electroencephalogram(EEG)were detected using task related component analysis(TRCA)*** analysis with 17 subjects indicated that the highest information transfer rate(ITR)was 29.80±4.65bpm with 0.5s data length for 60Hz and the classification accuracy was 70.07±4.15%.The online BCI system reached an averaged classification accuracy of 87.75±3.50%at 60Hz with 4s,resulting in an ITR of 16.73±*** particular,the maximum ITR for a subject was 80bpm with 0.5s at *** the BCI performance of 60Hz was lower than that of 15Hz and 30Hz,the results of the behavioral test indicated that,with no perception of flicker,the BCI system with 60Hz was more comfortable to use than 15Hz and *** analysis revealed that SSVEP with higher signal-to-noise ratio(SNR)corresponded to better classification performance and the improvement in comfortableness was accompanied by a decrease in *** study demonstrates the feasibility and potential of a user-friendly SSVEP-based BCI using imperceptible flickers.

关键词： brain-computer interface electroencephalogram steady-state visual evoked potentials imperceptible flickers phase coding task related component analysis

The Emergence, Epidemiology, and Etiology of Haff Disease

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Biomedical and Environmental Sciences 2019年第10期32卷 769-778页

作者： pei pei LI Xiao Yan lu Shuang Shuang LIU Zhe WANG Rui lu Xuan Cheng lu Kai Chinese Center for Disease Control and Prevention

Haff disease is a type of human rhabdomyolysis characterized by the sudden onset of unexplained muscular rigidity and an elevated serum creatine kinase level within 24 h after consuming cooked aquatic products. Here, we reviewed a previous study on Haff disease and summarized the clinical manifestations,epidemiological characteristics, and etiological data to confirm the incidence and global epidemiology of the disease and identify the most common seafood vectors. Future directions for Haff disease study will include further prospective etiological studies and the development of prevention and control strategies.

关键词： Rhabdomyolysis Seafood Haff disease Crayfish Epidemiology

CFD simulation of bubbling and collapsing characteristics in a gas-solid fluidized bed

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Petroleum Science 2009年第1期6卷 69-75页

作者： pei pei Zhang Kai lu Erwei Wen Dongsheng State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China School of Engineering and Materials Science Queen Mary University of London Mile End Road London UK E1 4NS

Computational Fluid Dynamics （CFD） has become an alternative method to experiments for understanding the fluid dynamics of multiphase flow. A two-fluid model, which contains additional terms in both the gas- and solid-phase momentum equations, is used to investigate the fluidization quality in a fluidized bed. A case study for quartz sand with a density of 2,660 kg/m^3 and a diameter of 500 μm, whose physical property is similar to a new kind of catalyst for producing clean fuels through the residue fluid catalytic cracking process, is simulated in a two-dimensional fluidized bed with 0.57 m width and 1.00 m height. Transient bubbling and collapsing characteristics are numerically investigated in the platform of CFX 4.4 by integrating user-defined Fortran subroutines. The results show that the fluidization and collapse process is in fair agreement with the classical theory of Geldart B classification, but the collapse time is affected by bubbles at the interface between the dense phase and freeboard.

关键词： Fluidized bed CFD simulation bubbling and collapsing behaviors

Biomedical Event Extraction Using a New Error Detection Learning Approach Based on Neural Network

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Computers, Materials & Continua 2020年第5期63卷 923-941页

作者： Xiaolei Ma Yang lu Yinan lu Zhili pei Jichao Liu College of the Computer Science and Technology Jilin UniversityChangchun130012China College of the Computer Science and Technology Inner Mongolia University for NationalitiesTongliao028000China School of Science and Technology Yanching Institute of TechnologyLangfang065202China

Supervised machine learning approaches are effective in text mining,but their success relies heavily on manually annotated ***,there are limited numbers of annotated biomedical event corpora,and the available datasets contain insufficient examples for training classifiers;the common cure is to seek large amounts of training samples from unlabeled data,but such data sets often contain many mislabeled samples,which will degrade the performance of ***,this study proposes a novel error data detection approach suitable for reducing noise in unlabeled biomedical event ***,we construct the mislabeled dataset through error data analysis with the development *** sample pairs’vector representations are then obtained by the means of sequence patterns and the joint model of convolutional neural network and long short-term memory recurrent neural *** this,the sample identification strategy is proposed,using error detection based on pair representation for unlabeled *** the latter,the selected samples are added to enrich the training dataset and improve the classification *** the BioNLP Shared Task GENIA,the experiments results indicate that the proposed approach is competent in extract the biomedical event from biomedical *** approach can effectively filter some noisy examples and build a satisfactory prediction model.

关键词： Biomedical event extraction pair representation error data detection sample identification

Design and Efficient Hardware Implementation Schemes for Non-Quasi-Cyclic LDPC Codes

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Tsinghua Science and Technology 2017年第1期22卷 92-103页

作者： Baihong Lin Yukui pei Liuguo Yin Jianhua lu Department of Electronic Engineering Tsinghua UniversityBeijing 100084 China School of Aerospace Tsinghua UniversityBeijing 100084

The design of a high-speed decoder using traditional partly parallel architecture for Non-Quasi-Cyclic（NQC） Low-Density Parity-Check（LDPC） codes is a challenging problem due to its high memory-block cost and low hardware utilization efficiency. In this paper, we present efficient hardware implementation schemes for NQCLDPC codes. First, we propose an implementation-oriented construction scheme for NQC-LDPC codes to avoid memory-access conflict in the partly parallel decoder. Then, we propose a Modified Overlapped Message-Passing（MOMP） algorithm for the hardware implementation of NQC-LDPC codes. This algorithm doubles the hardware utilization efficiency and supports a higher degree of parallelism than that used in the Overlapped Message Passing（OMP） technique proposed in previous works. We also present single-core and multi-core decoder architectures in the proposed MOMP algorithm to reduce memory cost and improve circuit efficiency. Moreover, we introduce a technique called the cycle bus to further reduce the number of block RAMs in multi-core decoders. Using numerical examples, we show that, for a rate-2/3, length-15360 NQC-LDPC code with 8.43-d B coding gain for Binary PhaseShift Keying（BPSK） in an Additive White Gaussian Noise（AWGN） channel, the decoder with the proposed scheme achieves a 23.8%–52.6% reduction in logic utilization per Mbps and a 29.0%–90.0% reduction in message-memory bits per Mbps.

关键词： Non-Quasi-Cyclic(NQC) Low-Density Parity-Check(LDPC) codes decoder design Modified Overlapped Message Passing(MOMP) algorithm hardware utilization efficiency