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A Novel Post-Quantum Blind Signature for Log System in Blockchain 被引量:5
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作者 Gang Xu Yibo Cao +4 位作者 Shiyuan Xu Ke Xiao Xin Liu Xiubo Chen Mianxiong Dong 《Computer Systems Science & Engineering》 SCIE EI 2022年第6期945-958,共14页
In recent decades, log system management has been widely studied fordata security management. System abnormalities or illegal operations can befound in time by analyzing the log and provide evidence for intrusions. In... In recent decades, log system management has been widely studied fordata security management. System abnormalities or illegal operations can befound in time by analyzing the log and provide evidence for intrusions. In orderto ensure the integrity of the log in the current system, many researchers havedesigned it based on blockchain. However, the emerging blockchain is facing significant security challenges with the increment of quantum computers. An attackerequipped with a quantum computer can extract the user's private key from thepublic key to generate a forged signature, destroy the structure of the blockchain,and threaten the security of the log system. Thus, blind signature on the lattice inpost-quantum blockchain brings new security features for log systems. In ourpaper, to address these, firstly, we propose a novel log system based on post-quantum blockchain that can resist quantum computing attacks. Secondly, we utilize apost-quantum blind signature on the lattice to ensure both security and blindnessof log system, which makes the privacy of log information to a large extent.Lastly, we enhance the security level of lattice-based blind signature under therandom oracle model, and the signature size grows slowly compared with others.We also implement our protocol and conduct an extensive analysis to prove theideas. The results show that our scheme signature size edges up subtly comparedwith others with the improvement of security level. 展开更多
关键词 log system post-quantum blockchain LATTICE blind signature privacy protection
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A Searchable Encryption Scheme Based on Lattice for Log Systems in Blockchain
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作者 Gang Xu Yibo Cao +4 位作者 Shiyuan Xu Xin Liu Xiu-Bo Chen Yiying Yu Xiaojun Wang 《Computers, Materials & Continua》 SCIE EI 2022年第9期5429-5441,共13页
With the increasing popularity of cloud storage,data security on the cloud has become increasingly visible.Searchable encryption has the ability to realize the privacy protection and security of data in the cloud.Howe... With the increasing popularity of cloud storage,data security on the cloud has become increasingly visible.Searchable encryption has the ability to realize the privacy protection and security of data in the cloud.However,with the continuous development of quantum computing,the standard Public-key Encryption with Keyword Search(PEKS)scheme cannot resist quantumbased keyword guessing attacks.Further,the credibility of the server also poses a significant threat to the security of the retrieval process.This paper proposes a searchable encryption scheme based on lattice cryptography using blockchain to address the above problems.Firstly,we design a lattice-based encryption primitive to resist quantum keyword guessing attacks.Moreover,blockchain is to decentralize the cloud storage platform’s jurisdiction of data.It also ensures that the traceability of keyword retrieval process and maintains the credibility of search result,which malicious platforms are prevented as much as possible from deliberately sending wrong search results.Last but not least,through security analysis,our proposed scheme satisfies the credibility and unforgeability of the keyword ciphertext.The comprehensive performance evaluates that our scheme has certain advantages in terms of efficiency compared with others. 展开更多
关键词 Lattice cryptography searchable encryption blockchain privacy protection log system information security applied cryptography
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Log4cxx在国产化平台的应用研究
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作者 陈家雄 梁聪 +2 位作者 徐明阳 秦子超 蒋中平 《电脑编程技巧与维护》 2024年第5期8-11,共4页
以国产化操作系统、数据库和硬件环境为基础,通过分析和示例详细阐述了使用及扩展Log4cxx日志框架实现日志信息记录和管理的具体方法,为国产化软件的开发和维护提供了高效、可靠、易用的日志解决方案。
关键词 log4cxx日志框架 国产化 操作系统 数据库
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基于改进LOG算子与Otsu算法结合的物体表面图像残损检测方法 被引量:2
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作者 李相格 《兰州交通大学学报》 CAS 2024年第1期59-63,共5页
针对物体表面残损区域存在明显的亮缺陷和不明显的暗缺陷这一特性,构建一种基于改进LOG算子与Otsu算法相结合的物体表面残损区域缺陷的边缘检测方法。首先,针对传统的LOG算子在检测图像亮缺陷边缘时检测结果不准确的问题,引入可根据图... 针对物体表面残损区域存在明显的亮缺陷和不明显的暗缺陷这一特性,构建一种基于改进LOG算子与Otsu算法相结合的物体表面残损区域缺陷的边缘检测方法。首先,针对传统的LOG算子在检测图像亮缺陷边缘时检测结果不准确的问题,引入可根据图像特性自动调整模糊因子的Wiener滤波代替传统LOG算子中的高斯滤波,以提高图像亮缺陷检测的精度;其次,针对检测图像暗缺陷边缘时结果不准确的问题,使用Otsu算法分析图像暗缺陷的灰度直方图来自动确定阈值,以提升暗缺陷边缘检测准确率;最后,采用像素加权平均融合算法对检测出的物体表面图像亮、暗缺陷边缘进行融合,以实现物体表面残损缺陷检测。实验结果表明:相较于单独使用改进的LOG算子和Otsu算法,采用加权融合的方法检测到的缺陷像素点数量与原始图片中基本一致,能够更准确地对图像中物体表面残损区域的亮、暗缺陷边缘进行检测。 展开更多
关键词 表面图像残损检测 WIENER滤波 log算子 OTSU算法 图像融合
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Empirical Study of E-logistics System Based on Tibet Logistics Industry 被引量:2
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作者 Yu LIU 《Asian Agricultural Research》 2013年第8期5-9,共5页
With the rapid growth of E-logistics in the global logistics industry,it is important to get insight into E-logistics system in Chinese logistics industry.Regarding the current situation of E-logistics of Chinese logi... With the rapid growth of E-logistics in the global logistics industry,it is important to get insight into E-logistics system in Chinese logistics industry.Regarding the current situation of E-logistics of Chinese logistics industry,there are still many problems to be concerned and resolved.This paper will review the concepts and theoretical background of E-logistics System from previous researches.After acknowledging the essential issues on E-logistics System,a research model is designed and tested based on the Theory Acceptance Model.This research aims to provide theoretical and practical contributions for Chinese logistics companies to enhance understanding on E-logistics System.It also provides some useful theoretical implication and practical guidelines for the development of E-logistics System in Chinese logistics industry. 展开更多
关键词 Chinese logISTICS INDUSTRY E-logISTICS process log
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A new methodology for identification of potential pay zones from well logs: Intelligent system establishment and application in the Eastern Junggar Basin, China 被引量:1
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作者 Guo Dali Zhu Kai +2 位作者 Wang Liang Li Jiaqi Xu Jiangwen 《Petroleum Science》 SCIE CAS CSCD 2014年第2期258-264,共7页
In recent years, as the exploration practices extend into more complicated formations, conventional well log interpretation has often shown its inaccuracy and limitations in identifying hydrocarbons. The Permian Wuton... In recent years, as the exploration practices extend into more complicated formations, conventional well log interpretation has often shown its inaccuracy and limitations in identifying hydrocarbons. The Permian Wutonggou Formation hosts typical clastic reservoirs in the Eastern Junggar Basin. The sophisticated lithology characteristics cause complex pore structures and fluid properties. These all finally cause low well testing agreement rate using conventional methods. Eleven years' recent statistics show that 12 out of 15 water layers have been incorrectly identified as being oil or oil/water layers by conventional well log interpretation. This paper proposes a methodology called intelligent prediction and identification system (IPIS). Firstly, parameters reflecting lithological, petrophysical and electrical responses which are greatly related to reservoir fluids have been selected carefully. They are shale content (Vsh), numbered rock type (RN), porosity (φ), permeability (K), true resistivity (RT) and spontaneous-potential (SP). Secondly, Vsh, φ and K are predicted from well logs through artificial neural networks (ANNs). Finally, all the six parameters are input into a neuro-fuzzy inference machine (NFIM) to get fluids identification results. Eighteen new layers of 145.3 m effective thickness were examined by IPIS. There is full agreement with well testing results. This shows the system's accuracy and effectiveness. 展开更多
关键词 Eastern Junggar Basin potential pay zone identification well log interpretation intelligentsystem neural network neuro-fuzzy inference machine
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Research on Establish an Efficient Log Analysis System with Kafka and Elastic Search 被引量:1
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作者 Yuanzhou Wei Manman Li Binsen Xu 《Journal of Software Engineering and Applications》 2017年第11期843-853,共11页
Search logs in a timely and efficient manner are an important part of SRE (Site Reliability Engineer). Logs help us solve the problems during our development work. In this paper, we will introduce you a way how to bui... Search logs in a timely and efficient manner are an important part of SRE (Site Reliability Engineer). Logs help us solve the problems during our development work. In this paper, we will introduce you a way how to build an efficient logs analysis system based on kafka and Elastic Search. We hope you can learn something through the iteration of the Version and get some inspiration with your own log analysis system. 展开更多
关键词 log Analysis system Kafka ELASTIC SEARCH Software Applications SITE Reliability ENGINEER
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Workflow logs analysis system for enterprise performance measurement 被引量:1
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作者 Lai Jin(赖瑾) Fan Yushun 《High Technology Letters》 EI CAS 2005年第3期274-279,共6页
Workflow logs that record the execution of business processes offer very valuable data resource for real-time enterprise performance measurement. In this paper, a novel scheme that uses the technology of data warehous... Workflow logs that record the execution of business processes offer very valuable data resource for real-time enterprise performance measurement. In this paper, a novel scheme that uses the technology of data warehouse and OLAP to explore workflow logs and create complex analysis reports for enterprise performance measurement is proposed. Three key points of this scheme are studied: 1) the measure set; 2) the open and flexible architecture for workflow logs analysis system; 3) the data models in WFMS and data warehouse. A case study that shows the validity of the scheme is also provided. 展开更多
关键词 WORKFLOW business performance measure data warehouse OLAP workflow logs analysis
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Design and Implementation of Log Data Analysis Management System Based on Hadoop 被引量:2
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作者 Dunhong Yao Yu Chen 《Journal of Information Hiding and Privacy Protection》 2020年第2期59-65,共7页
With the rapid development of the Internet,many enterprises have launched their network platforms.When users browse,search,and click the products of these platforms,most platforms will keep records of these network be... With the rapid development of the Internet,many enterprises have launched their network platforms.When users browse,search,and click the products of these platforms,most platforms will keep records of these network behaviors,these records are often heterogeneous,and it is called log data.To effectively to analyze and manage these heterogeneous log data,so that enterprises can grasp the behavior characteristics of their platform users in time,to realize targeted recommendation of users,increase the sales volume of enterprises’products,and accelerate the development of enterprises.Firstly,we follow the process of big data collection,storage,analysis,and visualization to design the system,then,we adopt HDFS storage technology,Yarn resource management technology,and gink load balancing technology to build a Hadoop cluster to process the log data,and adopt MapReduce processing technology and data warehouse hive technology analyze the log data to obtain the results.Finally,the obtained results are displayed visually,and a log data analysis system is successfully constructed.It has been proved by practice that the system effectively realizes the collection,analysis and visualization of log data,and can accurately realize the recommendation of products by enterprises.The system is stable and effective. 展开更多
关键词 log data HADOOP data analysis data visualization
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HiLog:OpenHarmony的高性能日志系统
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作者 吴圣垚 王枫 +4 位作者 武延军 凌祥 屈晟 罗天悦 吴敬征 《软件学报》 EI CSCD 北大核心 2024年第4期2055-2075,共21页
日志是计算机系统中记录事件状态信息的的重要载体,日志系统负责计算机系统的日志生成、收集和输出.OpenHarmony是新兴的、面向全设备、全场景的开源操作系统.在所述工作之前,包括日志系统在内OpenHarmony有许多关键子系统尚未构建,而Op... 日志是计算机系统中记录事件状态信息的的重要载体,日志系统负责计算机系统的日志生成、收集和输出.OpenHarmony是新兴的、面向全设备、全场景的开源操作系统.在所述工作之前,包括日志系统在内OpenHarmony有许多关键子系统尚未构建,而OpenHarmony的开源特性使第三方开发者可以为其贡献核心代码.为了解决Open Harmony日志系统缺乏的问题,主要开展如下工作:(1)分析当今主流日志系统的技术架构和优缺点;(2)基于OpenHarmony操作系统的异构设备互联特性设计HiLog日志系统模型规范;(3)设计并实现第1个面向OpenHarmony的日志系统HiLog,并贡献到OpenHarmony主线;(4)对HiLog日志系统的关键指标进行测试和对比试验.实验数据表明,在基础性能方面,HiLog和Log的日志写入阶段吞吐量分别为1500 KB/s和700 KB/s,相比Android日志系统吞吐量提升114%;在日志持久化方面,HiLog可以3.5%的压缩率进行持久化,并且丢包率小于6‰,远低于Log.此外,HiLog还具备数据安全、流量控制等新型实用能力. 展开更多
关键词 操作系统 日志系统 开源软件 数据安全 流量控制
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Deep-large faults controlling on the distribution of the venting gas hydrate system in the middle of the Qiongdongnan Basin, South China Sea 被引量:2
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作者 Jin-feng Ren Hai-jun Qiu +6 位作者 Zeng-gui Kuang Ting-wei Li Yu-lin He Meng-jie Xu Xiao-xue Wang Hong-fei Lai Jin Liang 《China Geology》 CAS CSCD 2024年第1期36-50,共15页
Many locations with concentrated hydrates at vents have confirmed the presence of abundant thermogenic gas in the middle of the Qiongdongnan Basin(QDNB).However,the impact of deep structures on gasbearing fluids migra... Many locations with concentrated hydrates at vents have confirmed the presence of abundant thermogenic gas in the middle of the Qiongdongnan Basin(QDNB).However,the impact of deep structures on gasbearing fluids migration and gas hydrates distribution in tectonically inactive regions is still unclear.In this study,the authors apply high-resolution 3D seismic and logging while drilling(LWD)data from the middle of the QDNB to investigate the influence of deep-large faults on gas chimneys and preferred gasescape pipes.The findings reveal the following:(1)Two significant deep-large faults,F1 and F2,developed on the edge of the Songnan Low Uplift,control the dominant migration of thermogenic hydrocarbons and determine the initial locations of gas chimneys.(2)The formation of gas chimneys is likely related to fault activation and reactivation.Gas chimney 1 is primarily arises from convergent fluid migration resulting from the intersection of the two faults,while the gas chimney 2 benefits from a steeper fault plane and shorter migration distance of fault F2.(3)Most gas-escape pipes are situated near the apex of the two faults.Their reactivations facilitate free gas flow into the GHSZ and contribute to the formation of fracture‐filling hydrates. 展开更多
关键词 Venting gas hydrates Deep-large faults Gas chimney Gas-escape pipes High-resolution 3D seismic logging while drilling Qiongdongnan Basin South China Sea
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An ARM-based debugging system for multipole array acoustic logging tools
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作者 Lu Junqiang Ju Xiaodong Men Baiyong 《Petroleum Science》 SCIE CAS CSCD 2014年第4期508-518,共11页
This paper presents a debugging system for multi-pole array acoustic logging (MPAL) tools. The debugging system proposed in this study can debug the MPAL tool system, sub-system and local electronics. In the test eq... This paper presents a debugging system for multi-pole array acoustic logging (MPAL) tools. The debugging system proposed in this study can debug the MPAL tool system, sub-system and local electronics. In the test equipment, we have used principal and subordinate structures, and interconnected the host computer and the front-end machine via Ethernet. The front-end machine is based on the ARM7 (advanced reduced instruction set computing (RISC) machine) technique, the processor of which runs an embedded operating system, namely, uClinux OS. We have analyzed the system telecommunication, human-machine interface circuit, transmitter mandrel interface circuit, receiver mandrel interface circuit, and board-level test interface circuit. The software used in the system consists of the embedded front-computer software and the host application software. We have explained in detail the flow chart of the boot loader in the embedded front-computer software. The host application software is composed of four application subroutines, which match with the functional modules of the system hardware. A net communication program based on the server^client mode is implemented by means of socket programming and multi-thread programming. Test results indicate that the data transmission rate of the system is higher than 1 MB/s, which completely meets the current requirements of the data transmission rate between the tool system and the wireline telemetry device. Application of the debugging system, which includes multiple level test methods, shows that the proposed system can fully meet the test requirements of MPAL at various levels. 展开更多
关键词 Acoustic logging tool debug system advanced RISC machines embedded technique network interconnection
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Logformer: Cascaded Transformer for System Log Anomaly Detection
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作者 Feilu Hang Wei Guo +3 位作者 Hexiong Chen Linjiang Xie Chenghao Zhou Yao Liu 《Computer Modeling in Engineering & Sciences》 SCIE EI 2023年第7期517-529,共13页
Modern large-scale enterprise systems produce large volumes of logs that record detailed system runtime status and key events at key points.These logs are valuable for analyzing performance issues and understanding th... Modern large-scale enterprise systems produce large volumes of logs that record detailed system runtime status and key events at key points.These logs are valuable for analyzing performance issues and understanding the status of the system.Anomaly detection plays an important role in service management and system maintenance,and guarantees the reliability and security of online systems.Logs are universal semi-structured data,which causes difficulties for traditional manual detection and pattern-matching algorithms.While some deep learning algorithms utilize neural networks to detect anomalies,these approaches have an over-reliance on manually designed features,resulting in the effectiveness of anomaly detection depending on the quality of the features.At the same time,the aforementioned methods ignore the underlying contextual information present in adjacent log entries.We propose a novel model called Logformer with two cascaded transformer-based heads to capture latent contextual information from adjacent log entries,and leverage pre-trained embeddings based on logs to improve the representation of the embedding space.The proposed model achieves comparable results on HDFS and BGL datasets in terms of metric accuracy,recall and F1-score.Moreover,the consistent rise in F1-score proves that the representation of the embedding spacewith pre-trained embeddings is closer to the semantic information of the log. 展开更多
关键词 Anomaly detection system logs semi-structured data pre-trained embedding cascaded transformer
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Research and Application of Log Defect Detection and Visualization System Based on Dry Coupling Ultrasonic Method
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作者 Yongning Yuan Dong Zhang +4 位作者 Usama Sayed Hao Zhu Jun Wang Xiaojun Yang Zheng Wang 《Journal of Renewable Materials》 EI 2023年第11期3917-3932,共16页
In order to optimize the wood internal quality detection and evaluation system and improve the comprehensive utilization rate of wood,this paper invented a set of log internal defect detection and visualization system... In order to optimize the wood internal quality detection and evaluation system and improve the comprehensive utilization rate of wood,this paper invented a set of log internal defect detection and visualization system by using the ultrasonic dry coupling agent method.The detection and visualization analysis of internal log defects were realized through log specimen test.The main conclusions show that the accuracy,reliability and practicability of the system for detecting the internal defects of log specimens have been effectively verified.The system can make the edge of the detected image smooth by interpolation algorithm,and the edge detection algorithm can be used to detect and reflect the location of internal defects of logs accurately.The content mentioned above has good application value for meeting the requirement of increasing demand for wood resources and improving the automation level of wood nondestructive testing instruments. 展开更多
关键词 Ultrasonic method log defect detection visualization system dry coupling B-scan pulse transmission method bilinear image interpolation algorithm edge detection algorithm
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Design and Implementation of a Photovoltaic Data Acquisition System for Some Meteorological Variables
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作者 Nicholas N. Tasie Friday B. Sigalo +1 位作者 Valentine B. Omubo-Pepple Chigozie Israel-Cookey 《Energy and Power Engineering》 CAS 2022年第11期652-668,共17页
In this paper we have developed a data logging and monitoring system, we validated the system by comparing the result from it with the existing one and found that the system performs slightly better than the existing ... In this paper we have developed a data logging and monitoring system, we validated the system by comparing the result from it with the existing one and found that the system performs slightly better than the existing work in the same area. This implies that the data logger and monitoring system is good and can be used to monitor solar energy variables even at the comfort of our homes. We fitted a model to the generated data and found that the meteorological variables considered accounted for 99.88% of the power output in the rainy seasons while 0.12% of the variation was not explained due to other factors. Solar panels inclined at an angle of 5&deg; (Tilt) and facing South Pole perform optimally. 展开更多
关键词 Data logging and Monitoring system Circuit Design Development Chip Programming and Software Development Photovoltaic Cell Meteorological Parameters
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Feedback⁃Aware Anomaly Detection Through Logs for Large⁃Scale Software Systems
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作者 HAN Jing JIA Tong +2 位作者 WU Yifan HOU Chuanjia LI Ying 《ZTE Communications》 2021年第3期88-94,共7页
One particular challenge for large‑scale software systems is anomaly detection.System logs are a straightforward and common source of information for anomaly detection.Existing log‑based anomaly detectors are unusable... One particular challenge for large‑scale software systems is anomaly detection.System logs are a straightforward and common source of information for anomaly detection.Existing log‑based anomaly detectors are unusable in real‑world industrial systems due to high false‑positive rates.In this paper,we incorporate human feedback to adjust the detection model structure to reduce false positives.We apply our approach to two industrial large‑scale systems.Results have shown that our approach performs much better than state‑of‑the-art works with 50%higher accuracy.Besides,human feedback can reduce more than 70%of false positives and greatly improve detection precision. 展开更多
关键词 human feedback log‑based anomaly detection system log
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Design and Construction of a Real-Time Temperature Logging System
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作者 Ogidan Olugbenga Kayode Kolawole Michael.O +1 位作者 Bamisaye Ayodeji James Ewetumo Theophilus 《通讯和计算机(中英文版)》 2011年第9期780-783,共4页
关键词 人体温度 记录系统 实时 标准热电偶 施工 设计 测量设备 健康状况
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The Automatic HTTP Requests Logging and Replaying Subsystem for CMS Plone
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作者 Maksym Oleksiv Taras Poburynnyi 《Journal of Electrical Engineering》 2014年第1期29-33,共5页
In the paper, the problem of storing and replaying of HTTP requests to websites in order to improve their debugging efficiency during development and further support is considered. To solve this problem, the automatic... In the paper, the problem of storing and replaying of HTTP requests to websites in order to improve their debugging efficiency during development and further support is considered. To solve this problem, the automatic HTTP requests logging and replaying subsystem Dagger that provides storage and playback of the requests sent to a website, which is developed by CMS (content management system) Plone means, is offered. The subsystem consists of the three components: Detector, Logger and Player. Detector detects filters user's requests, creates a log and sends it to Logger. Logger is a daemon program that stores logs of user's work with a website. The logs are stored in the files in one of the supported formats: JSON, CSV, PICKLE. Player replays the GET and POST HTTP requests that users sent to a server. 展开更多
关键词 CMS plone logGING HTTP requests
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Gas-Liquid Separation Processes for Mud Logging Systems
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作者 Daniela Martins Marum Maria Dina Afonso Brian Bernardo Ochoa 《Journal of Geological Resource and Engineering》 2021年第2期29-37,共9页
The TRU-Vision system,developed by Baker Hughes,analyzes the gas extracted from drilling mud to estimate the hydrocarbons composition in drilled rock formations.Several separation processes had been surveyed in order ... The TRU-Vision system,developed by Baker Hughes,analyzes the gas extracted from drilling mud to estimate the hydrocarbons composition in drilled rock formations.Several separation processes had been surveyed in order to enhance the gas extraction at the gas trap,namely,mechanical stirring,vacuum,air sparging,membrane separation processes,ultrasounds,and cyclones.Mechanical stirring devices(one propeller,one flat-blade turbine,and two baffles sets),a vacuum generator,and an air bubble generator were designed and assembled to increase the efficiency and the response stability of TRU-Vision system. 展开更多
关键词 Air sparging gas extraction mechanical stirring mud logging VACUUM
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AgamottoEye:Recovering Request Flow for Cloud Systems via Log Analysis
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作者 Jie Lu Feng Li Lian Li 《Journal of Computer Science Research》 2019年第2期30-34,共5页
Cloud applications are implemented on top of different distributed systems to provide online service.A service request is decomposed into multiple sub-tasks,which are dispatched to different distributed systems compon... Cloud applications are implemented on top of different distributed systems to provide online service.A service request is decomposed into multiple sub-tasks,which are dispatched to different distributed systems components.For cloud providers,monitoring the execution of a service request is crucial to promptly find problems that may compromise cloud availability.In this paper,we present AgamottoEye,to automatically construct request flow from existing logs.AgamottoEye addresses the challenges of analyzing interleaved log instances,and can successfully extract request flow spread across multiple distributed systems.Our experiments with Hadoop2/YARN show that AgamottoEye can analyze 25,050 log instances in 57.4s,and the extracted request flow information is helpful with error detection and diagnosis. 展开更多
关键词 Cloud applications log analysis Request flow
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