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Predicting resource consumption in a web server using ARIMA model

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Journal of Beijing Institute of Technology 2014年第4期23卷 502-510页

作者：闫永权郭平 School of Computer Science and Technology Beijing Institute of Technology

Software aging is a phenomenon observed in a software application executing continuous- ly for a long period of time, where the state of software degrades and leads to performance degrada- tion, hang/crash failures or both. A technique named rejuvenation was proposed to counteract this problem. Rejuvenation in period is not a good idea, because the speed of software aging is not constant, but variable. The key to find an optimal timing to resist aging problem is how to analyze/fore- cast the resource consumption of aging system. An ARIMA model is applied to forecast resource con- sumption due to software aging in a running web server. First, order and parameters of ARIMA model need to be identified. Second, it needs to be checked whether the model satisfies stationarity and reversibility. Finally, ARIMA model is used to predict resource consumption. The experiment results indicate that ARIMA model can do better than ANN model and SVM model in the forecasts of available memory and heap memory.

关键词： software aging software rejuvenation ARIMA web server

Detecting DDoS Attacks against web server Using Time Series Analysis

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 175-180页

作者： WU Qing-tao SHAO Zhi-qing Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China

Distributed Denial of Service （DDoS） attack is a major threat to the availability of web service. The inherent presence of self-similarity in web traffic motivates the applicability of time series analysis in the study of the burst feature of DDoS attack. This paper presents a method of detecting DDoS attacks against web server by analyzing the abrupt change of time series data obtained from web traffic. Time series data are specified in reference sliding window and test sliding window, and the abrupt change is modeled using Auto-Regressive （AR） process. By comparing two adjacent nonoverlapping windows of the time series, the attack traffic could be detected at a time point. Combined with alarm correlation and location correlation, not only the presence of DDoS attack, but also its occurring time and location can be deter mined. The experimental results in a test environment are illustrated to justify our method.

关键词： distributed denial of service auto-regressive model time series web server

finDr:A web server for in silico D-peptide ligand identification

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Synthetic and Systems Biotechnology 2021年第4期6卷 402-413页

作者： Helena Engel Felix Guischard Fabian Krause Janina Nandy Paulina Kaas Nico Hofflin Maja Kohn Normann Kilb Karsten Voigt Steffen Wolf Tahira Aslan Fabian Baezner Salom´e Hahne Carolin Ruckes Joshua Weygant Alisa Zinina Emir Bora Akmeriç Enoch B.Antwi Dennis Dombrovskij Philipp Franke Klara L.Lesch Niklas Vesper Daniel Weis Nicole Gensch Barbara Di Ventura Mehmet Ali Oztürk Signalling Research Centres BIOSS and CIBSS University of FreiburgSchanzlestr.1879104FreiburgGermany Institute of Biology III Faculty of BiologyUniversity of FreiburgSchanzlestr.179104FreiburgGermany Institute of Biology II Faculty of BiologyUniversity of FreiburgSchanzlestr.179104FreiburgGermany AG Roth-Lab for MicroarrayCopying ZBSA-Centre for Biological Systems AnalysisUniversity of FreiburgHabsburgerstrasse 4979104FreiburgGermany Biomolecular Dynamics Institute of PhysicsUniversity of FreiburgHermann-Herder-Strasse 3a79104FreiburgGermany Core Facility Signalling Factory Centre for Biological Signaling Studies(BIOSS)University of FreiburgSchanzlestr.1879104FreiburgGermany Spemann Graduate School of Biology and Medicine(SGBM) University of FreiburgAlbertstraße 19A79104FreiburgGermany Internal Medicine IV Department of MedicineMedical CenterUniversity of FreiburgHugstetter Straße 5579106FreiburgGermany Institute for Biochemistry University of FreiburgAlbertstr.2179104FreiburgGermany

In the rapidly expanding field of peptide therapeutics,the short in vivo half-life of peptides represents a considerable limitation for drug action.D-peptides,consisting entirely of the dextrorotatory enantiomers of naturally occurring levorotatory amino acids(AAs),do not suffer from these shortcomings as they are intrinsically resistant to proteolytic degradation,resulting in a favourable pharmacokinetic *** experimentally identify D-peptide binders to interesting therapeutic targets,so-called mirror-image phage display is typically performed,whereby the target is synthesized in D-form and L-peptide binders are screened as in conventional phage *** technique is extremely powerful,but it requires the synthesis of the target in D-form,which is challenging for large *** we present finDr,a novel web server for the computational identification and optimization of D-peptide ligands to any protein structure(https://***/).finDr performs molecular docking to virtually screen a library of helical 12-mer peptides extracted from the RCSB Protein Data Bank(PDB)for their ability to bind to the *** a separate,heuristic approach to search the chemical space of 12-mer peptides,finDr executes a customizable evolutionary algorithm(EA)for the de novo identification or optimization of D-peptide *** a proof of principle,we demonstrate the validity of our approach to predict optimal binders to the pharmacologically relevant target phenol soluble modulin alpha 3(PSMα3),a toxin of methicillin-resistant Staphylococcus aureus(MRSA).We validate the predictions using in vitro binding assays,supporting the success of this *** to conventional methods,finDr provides a low cost and easy-to-use alternative for the identification of D-peptide ligands against protein targets of choice without size *** believe finDr will facilitate D-peptide discovery with implications in biotechnology and biomedicine.

关键词： D-peptide web server Evolutionary algorithm Peptide design Molecular docking Mirror-image phage display

A Robust IP Packets Filtering Mechanism for Protecting web server from DDoS Attacks

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Wuhan University Journal of Natural Sciences 2006年第5期11卷 1271-1277页

作者： WU Qingtao SHAO Zhiqing DING Zhiyi LIU Gang Department of Computer Science Henan Universityof Science and Technology Luoyang 471003 Henan China Department of Computer Science and Engineering East China University of Science and Technology Shanghai200237 China

Distributed denial of service （DDoS） attacks exploit the availability of web servers, resulting in the severe loss of their connectivity. We present a robust IP packets filtering mechanism which combines the detection and filtering engine together to protect web servers from DDoS Attacks. The mechanism can detect DDoS attacks by inspecting inbound packets with an IP address database, and filter out lower priority IP addresses to preserve the connection for valid users by monitoring the queues status. We use the Netfilter＇s technique, a framework inside the Linux 2.4. X, to implement it on a web server. Also, we evaluate this mechanism and analyze the influence of some important parameters on system performance. The experimental results show that this mechanism is effective against DDoS attacks.

关键词： web server distributed denial of service IP packets filtering Hop-Count filtering history-based IP filtering

CKSAAPUbSite:a web server to Predict Ubiquitination Sites in the Proteome of ***

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CKSAAPUbSite:a Web Server to Predict Ubiquitination Sites in...

The Implementation and Application of Construction Safety Supervision and Management System based on web server

第五届全国生物信息学与系统生物学学术大会暨国际生物信息学前沿研讨会高通量时代的生物信息学与系统生物学

作者： Zhen Chen Ziding Zhang State Key Laboratory of Agrobiotechnology College of Biological SciencesChina Agricultural University

Background:As one of the most important reversible protein post-translation modifications,ubiquitination has been reported to be involved in lots of biological processes. To fully decipher the molecular mechanisms of ubiquitination-related biological processes, an initial but crucial step is the recognition of ubiquitylated substrates and the corresponding ubiquitination sites. Methods:Based on our published ubiqutination site prediction method,a user-friendly web server called CKSAAPUbSite was ***,CKSAAPUbSite is an SVMbased predictor and the employed feature vector is the composition of k-spaced amino acid *** protein sequence input to our server should be in RAW or FASTA *** the 20 conventional amino acid symbols are *** prediction output consists of three items:position,score and ubiquitination site annotations(YES for ubiquitination sites,NO for non-ubiquitination sites).Additionally,graph output is also given in the result page to show all the positions of lysines of a query protein and the corresponding prediction scores. Results:A web server of CKSAAPUbSite was constructed,which is freely available at http://***/cksaapbsite/.When intensively tested on a set of experimentally verified ubiquitination sites,the class-balanced accuracy and MCC of CKSAAPUbSite reached 73.40%and 0.4694,respectively. Conclusions:CKSAAPUbSite can be used for proteome-wide ubiquitination site *** the training dataset was selected from the proteome of ***,the application of CKSAAPUbSite should be favorable in the proteome of ***.

关键词： CKSAAPUbSite Proteome Ubiquitination site prediction web server

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The Implementation and Application of Construction Safety Su...

嵌入式以太网web server测控模块的研究与设计

2012年计算机应用与系统建模国际会议

作者： Min Cao Jihai Huang Information Engineering College Zhongzhou University

This paper focuses on the basic principles and main components of web server-based construction safety supervision and management. Comparative and analysis of the characteristics and advantages of the system, its application for safety of the construction enterprises in production controlled and the closed-loop management provides strong guarantee and support.

关键词： web server COMS Image Construction Safety Supervision and Management

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嵌入式以太网Web Server测控模块的研究与设计

作者：王玉堂重庆大学

学位级别：硕士

随着以太网技术不断发展,嵌入式系统与以太网相结合应用于工业控制领域已成为一大趋势。本文给出了一个基于嵌入式工业以太网的控制方案,基于此,具体讨论并实现了节点网络控制器的硬件架构和软件体系,为工业现场最底层的设备架设了单一... 详细信息

随着以太网技术不断发展,嵌入式系统与以太网相结合应用于工业控制领域已成为一大趋势。本文给出了一个基于嵌入式工业以太网的控制方案,基于此,具体讨论并实现了节点网络控制器的硬件架构和软件体系,为工业现场最底层的设备架设了单一高效的网络结构,形成了与现有Internet无缝连接的数据传输通道。以太网最典型的应用形式就是Ethernet + TCP/IP,它的底层是Ethernet,搭建此网络测控模块所需要的核心以太网控制器,分析网络低层工作机理,讨论并分析通过设置以太网控制器CS8900A特殊的内部寄存器来完成以太帧的有效接收和发送,采用高性能的MSP430F449微控制器与以太网控制器相结合实现网络数据传输的方案,对它们之间电路接口作了详细的阐述。针对嵌入式应用中处理器RAM受限,在保证能实现网络通信的基础上对网络协议进行适当裁减,以太网接口程序主要用于封装要发送的数据帧、读写CS8900A内部寄存器和接受以太网数据帧等功能,以应用程序接口(API)形式,实现TCP/IP协议,屏蔽低层硬件(以太网控制器)细节。设计并实现了网络层协议IP、ARP、ICMP等,可靠流式报文段传输协议TCP以及应用层协议HTTP协议。收发数据使用全局变量,避免了过多的参数传递所消耗的系统资源。有效的提高了不同协议之间相互调用的速度。程序的分层结构以及合理的函数调用接口可方便扩展功能。协议以API(应用程序接口)函数的形式实现,可供二次开发、扩展功能。整个网络协议体系既能与通用协议一致又能兼顾嵌入式系统本身空间小、结构紧凑。最后就工业控制过程中实现B/S结构模型,利用应用层协议HTTP协议实现了嵌入式以太网web server,在浏览器下使用HTML表单可以远程浏览工业现场实时采集的数据。本课题的研究工作以建立嵌入式以太网web server用于测控为目的,研制出了实验平台,可供进一步开发和扩展。

关键词：嵌入式以太网 TCP/IP web server 测控网络

Study of Realized Mehtod on a Java web server Monitoring System

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Study of Realized Mehtod on a Java Web Server Monitoring Sys...

基于web server和Android平台的智能幼儿园管理系统

2011 International Conference on Engineering and Information Management (ICEIM 2011)

作者： Kun Liu Hai-yan Zhao Long-jiang Dong Li-juan Du College of Oriental Application & Technology Beijing Union University Software Development Department Adobe (Beijing) Corporation

This paper introduces the JMX technology and MXBean platform firstly, then designs a monitoring architecture based on JMX technology and MXBean. Lastly the actual application of this architecture is described with weblogic monitoring object as an example. The experiments prove that this monitoring system can monitor servers in real time and send out warning messages when servers are in an unstable state.

关键词： Java Management Extentions Monitoring System Java Virtual Machine web server

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基于Web Server和Android平台的智能幼儿园管理系统

作者：杨世淼浙江大学

学位级别：硕士

随着科学技术的发展,人类社会进入了信息化时代。以信息技术为代表的高新科技极大地促进了社会与经济的发展,并且逐渐改变了人们工作和生活的方式。许多高校以及企业中实施的信息管理系统就是信息化的重要应用之一。而智能信息管理系统... 详细信息

随着科学技术的发展,人类社会进入了信息化时代。以信息技术为代表的高新科技极大地促进了社会与经济的发展,并且逐渐改变了人们工作和生活的方式。许多高校以及企业中实施的信息管理系统就是信息化的重要应用之一。而智能信息管理系统是指依托计算机、通信网络等现代化的工具和手段,实现智能收集、处理、传送人员信息的系统。在传统幼儿园当中,人员的信息、幼儿的档案、学生签到、视频监控等都是相互割裂的,这就使得管理人员在处理各方面不同事务时经常需要跨系统调取资源,使得办公资源被浪费,工作效率低下。为了实现办公自动化,提高幼儿园管理水平、教学质量,本文为幼儿园设计了一套智能信息管理系统。系统整合了校园中各个独立的资源,自动关联其中的信息数据。通过此系统幼儿园能够节省人力成本、节约时间资源,同时使其管理更加规范和高效。本文首先阐述了智能幼儿园管理系统的研究意义以及现状,介绍了智能管理系统中用到的相关技术。其次,本文针对智能幼儿园管理系统需要根据需求不断升级的特点,为了方便使用人员的操作,提出了采用B/S (Browser/server)结构与C/S (Client/Serv er)结构相结合的方式来设计智能信息管理系统。本文设计的智能信息管理系统主要包括web server端与签到机端。其中,web server端采用目前主流的ThinkPHP框架进行设计;签到机采用目前技术上较为成熟的Android平台作为操作系统,并在此基础上为签到机设计了相关的软硬件。同时,为了让web server与签到机之间能够方便地同步信息,选择了HTTP协议作为两者通信的方式。第三,本文在系统总体架构设计的基础上,阐述了web server端与签到机的具体实现方法。在考虑安全性与可维护性的基础上,完成了智能幼儿园管理系统中刷卡签到,短信通知,远程监控等基本功能。第四,本文提出了一种基于LK光流法的突发事件检测算法,能够检测视频中发生的突发事件并及时发出警报。算法将应用到智能幼儿园管理系统中,用于检测校园异常状况。此外,算法具有较强的通用性,适用于大多数公共场所的突发事件检测。最后,本文完成了智能幼儿园管理系统的测试,测试结果表明系统的设计能够很好地实现校园管理系统所预定的目标。

关键词：智能幼儿园信息管理系统 web server Android 视频检测