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A Web Server Cluster Solution Based on Twitter Storm

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Journal of Data Analysis and Information Processing 2014年第1期2卷 6-11页

作者： xiaoling xia Lin Tian School of Computer Science and Technology Donghua University Shanghai China

Single Web server would become a bottleneck that influences the availability and stability of Web service. Ten years ago, what had been proposed is to add Web servers for resolving this problem—Web Server Cluster. In recent years, the concept of cloud computing has got rapid development, and is becoming the future development trend of the IT industry. One of the characteristics of cloud computing is putting lots of computing resources together to provide users with a unified service. In this paper, we have proposed a new Cloud-Based Web Server Cluster Solution, based on the existing cloud computing model—Twitter Storm. It involves a new way to handle the web request from client and some other new features compared to the traditional Web Server Cluster. Combining with cloud computing, it would be the new trend of Web Server Cluster, and its feasibility is described in the paper too.

关键词： Twitter Storm Web Server Cluster Cloud Computing

Newly discovered insect RNA viruses in China

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维普期刊数据库

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Science China(Life Sciences) 2013年第8期56卷 711-714页

作者： QIU Yang WANG ZhaoWei LIU Yongxiang QI Nan SI Jie xiaNG Xue xia xiaoling HU YuanYang ZHOU Xi State Key Laboratory of Virology College of Life SciencesWuhan University

Insects are a group of arthropods and the largest group of animals on Earth,with over one million species described to *** other life forms,insects suffer from viruses that cause disease and *** that are pathogenic to beneficial insects cause dramatic economic losses on *** contrast,viruses that are pathogenic to insect pests can be exploited as attractive biological control *** of these factors have led to an explosion in the amount of research into insect viruses in recent years,generating impressive quantities of information on the molecular and cellular biology of these *** to the wide variety of insect viruses,a better understanding of these viruses will expand our overall knowledge of their ***,we review studies of several newly discovered RNA insect viruses in China.

关键词： insect virus Wuhan Nodavirus Dendrolimus punctatus tetravirus Ectropis obliqua picorna-like virus

Customer Churn Prediction Model Based on User Behavior Sequences

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Journal of Donghua University(English Edition) 2022年第6期39卷 597-602页

作者： ZHAI Cuiyan ZHANG Manman xia xiaoling MIAO Yiwei CHEN Hao College of Computer Science and Technology Donghua UniversityShanghai 201620China

Customer churn prediction model refers to a certain algorithm model that can predict in advance whether the current subscriber will terminate the contract with the current operator in the *** scholars currently introduce different depth models for customer churn prediction research,but deep modeling research on the features of historical behavior sequences generated by users over time is *** this paper,a customer churn prediction model based on user behavior sequences is *** this method,a long-short term memory(LSTM)network is introduced to learn the overall interest preferences of user behavior *** the multi-headed attention mechanism is used to learn the collaborative information between multiple behaviors of users from multiple perspectives and to carry out the capture of information about various features of *** validated on a real telecom dataset,the method has better prediction performance and further enhances the capability of the customer churn prediction system.

关键词： multi-headed attention mechanism long-short term memory(LSTM) customer churn prediction

Narrow Pooling Clothing Classification Based on Attention Mechanism

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Journal of Donghua University(English Edition) 2022年第4期39卷 367-372页

作者： MA xiao WANG Shaoyu YE Shaoping FAN Jingyi XU An xia xiaoling School of Computer Science and Technology Donghua UniversityShanghai 201620China

In recent years,with the rapid development of e-commerce,people need to classify the wide variety and a large number of clothing images appearing on e-commerce *** order to solve the problems of long time consumption and unsatisfactory classification accuracy arising from the classification of a large number of clothing images,researchers have begun to exploit deep learning techniques instead of traditional learning *** paper explores the use of convolutional neural networks(CNNs)for feature learning to enhance global feature information interactions by adding an improved hybrid attention mechanism(HAM)that fully utilizes feature weights in three dimensions:channel,height,and ***,the improved pooling layer not only captures local feature information,but also fuses global and local information to improve the misclassification problem that occurs between similar *** on the Fashion-MNIST and DeepFashion datasets show that the proposed method significantly improves the accuracy of clothing classification(93.62%and 67.9%)compared with residual network(ResNet)and convolutional block attention module(CBAM).

关键词： clothing classification convolutional neural network(CNN) residual network(ResNet) attention mechanism narrow pooling

Application of multidisciplinary in situ simulation training in the treatment of acute ischemic stroke: a quality improvement project

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World Journal of Emergency Medicine 2024年第1期15卷 41-46页

作者： Ganying Huang Huijie Yang Huan Yao Xinxin Fan Wenqin xia Yuansheng Xu xiaoling Shen Xue Zhao Fourth School of Clinical Medicine Zhejiang Chinese Medical UniversityHangzhou 310053China Emergency Medicine Departent Hangzhou First People's HospitalHangzhou 310006China

BACKGROUND:Ischemic stroke refers to a disorder in the blood supply to a local area of brain tissue for various reasons and is characterized by high morbidity,mortality,and *** reperfusion of brain tissue at risk of injury is crucial for the treatment of acute ischemic *** purpose of this study was to evaluate comfort levels in managing acute stroke patients with hypoxemia who required endotracheal intubation after multidisciplinary in situ simulation training and to shorten the door-to-image ***:This quality improvement project utilized a comprehensive multidisciplinary in situ simulation exercise.A total of 53 participants completed the two-day in situ simulation *** main outcome was the self-reported comfort levels of participants in managing acute stroke patients with hypoxemia requiring endotracheal intubation before and after simulation training.A 5-point Likert scale was used to measure participant comfort.A paired-sample t-test was used to compare the mean self-reported comfort scores of participants,as well as the endotracheal intubation time and door-to-image time on the fi rst and second days of in situ simulation *** door-to-image time before and after the training was also ***:The findings indicated that in situ simulation training could enhance participant comfort when managing acute stroke patients with hypoxemia who required endotracheal intubation and shorten door-to-image *** the emergency management of hypoxemia or tracheal intubation,the mean post-training self-reported comfort score was signifi cantly higher than the mean pre-training comfort score(hypoxemia:4.53±0.64 vs.3.62±0.69,t=-11.046,P<0.001;tracheal intubation:3.98±0.72 vs.3.43±0.72,t=-6.940,P<0.001).We also observed a decrease in the tracheal intubation and door-to-image time and a decreasing trend in the door-to-image time,which continued after the ***:Our study demonstrates that the implementation of in s

关键词： Ischemic stroke Endotracheal intubation Door-to-image time In situ simulation Multidisciplinary approach

Research on Outer Join Optimization in Parallel DBMS

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Research on Outer Join Optimization in Parallel DBMS

列存储数据仓库中基于概率的保序字符串压缩方法

2011 International Conference on Computer Science and Information Technology(ICCSIT 2011)

作者： Juntao Li xiaoling xia School of Computer Science and Technology Donghua University

ISBN: (纸本)9781612848334

parallel database management systems (PDBMS) are widely used to process the ever-increasing data volume and complex queries in large-scale enterprise. Business Intelligence (BI) generated a large amount of outer joins to query data warehouses powered by parallel DBMS. With a brief introduction to the development of outer join optimization in parallel DBMS, we firstly describe ROJA, DOJA, and DERA three kinds of outer join algorithms, and then compare them with each other which is the main purpose of this paper. At last, we discuss the challenges of outer join optimization that we are currently facing with.

关键词： parallel DBMS outer join business intelligentce

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cnki会议

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计算机研究与发展 2013年第8期50卷 1674-1682页

作者：夏小玲李海燕王梅东华大学计算机科学与技术学院上海201620

数据仓库中采用按列存储的方式更有利于数据的压缩,保留顺序的轻量级压缩方法对列存储的字符串属性压缩显示其优越性,然而现有做法很难兼顾字符串出现的概率对压缩效率的影响,影响了压缩性能.因此,提出一种基于概率的保序字符串压缩方法... 详细信息

数据仓库中采用按列存储的方式更有利于数据的压缩,保留顺序的轻量级压缩方法对列存储的字符串属性压缩显示其优越性,然而现有做法很难兼顾字符串出现的概率对压缩效率的影响,影响了压缩性能.因此,提出一种基于概率的保序字符串压缩方法.首先,提出一种扩展的共用叶子结构,使得编码索引和解码索引共享同一个码表,大大减少了编码和解码索引的维护时间.同时在该结构中,记录字符串出现的概率,并根据概率的高低建立解码索引,有效降低了高频字符串的解压时间.进一步,根据列存储的特点,将用于列连接的行号信息保存在扩展的叶子结构中,从而有效减少了列值索引的存储空间和创建时间.实验结果验证了该方法的有效性.

关键词：列存储字符串压缩保序轻量级压缩共享叶子字符串出现次数

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基于代理竞拍网站的同步竞拍技术研究与实现

计算机应用与软件 2014年第10期31卷 70-72,85页

作者：夏小玲张牛东华大学计算机科学与技术学院上海201620

网络竞拍作为电子商务的一种交易形式,已经发展得十分成熟。人们不再局限于参与本国的网络竞拍,而是越来越多地通过网络参与各国知名竞拍网站的竞拍。由于种种原因,导致跨国度竞拍难以实现,于是出现了代理竞拍网站,而同步竞拍技术是实... 详细信息

网络竞拍作为电子商务的一种交易形式,已经发展得十分成熟。人们不再局限于参与本国的网络竞拍,而是越来越多地通过网络参与各国知名竞拍网站的竞拍。由于种种原因,导致跨国度竞拍难以实现,于是出现了代理竞拍网站,而同步竞拍技术是实现代理竞拍网站的核心。提出一种解决问题的网络模型,使用HttpClient抓取竞拍网站页面的数据,保证信息的实时性、减少系统数据库的开销;通过修改优化Web应用测试工具Selenium,服务器端低开销地自动完成在目标竞拍网站出价的操作,从而实现同步竞拍。该模型具有更好的兼容性、通用性和稳定性。

关键词： HttpClient Selenium 网络竞拍同步竞拍技术

基于ADP3339的线性稳压主频分离测距测量系统

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科技通报 2015年第4期31卷 145-147页

作者：夏晓玲鄂州职业大学电子电气工程系湖北鄂州436000

传统的高稳定性低压差线性测距测量方法在线性稳压器中虽采用了稳定性较好的硅光主频技术,并且配合多种三维雷达控制方法,但参数匹配度和主频匹配度仍受到线性电压调整率、负载调整率影响,降低了压差线性测距技术的准精度。为此,提出一... 详细信息

传统的高稳定性低压差线性测距测量方法在线性稳压器中虽采用了稳定性较好的硅光主频技术,并且配合多种三维雷达控制方法,但参数匹配度和主频匹配度仍受到线性电压调整率、负载调整率影响,降低了压差线性测距技术的准精度。为此,提出一种基于ADP3339的线性稳压主频分离测距方法,通过比较线性电压,探测和主频分离距离间隔测量技术进行勘测,建立分离测距系统和分离系统,选择线性的分离测距测量仪和稳压的主频,实现高精度主频分离脉冲静态测距。实验结果验证了稳压探测和分离测量技术在测距中的可行性,为开展脉冲分离测距积累经验,且工作性能稳定,线性良好,满足线性稳压主频分离测距测量指标。

关键词：线性稳压主频分离测量