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An Asynchronous-Driven *** Based Intermediary-free Direct Deal Distribution Platform Converged with Cloud Service

KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS 2019年第8期13卷 4212-4226页

作者： Lee, SongYeon Paik, JongHo Seoul Womens Univ Dept Comp Sci Seoul South Korea Seoul Womens Univ Dept Software Convergence Seoul South Korea

In this paper, a design and implementation for direct deal distribution platform is proposed to bypass the complex traditional distribution structure of agricultural market, as one of the fields where distribution patterns have changed. In the case of domestic agricultural distribution, demand and supply are unstable since the sales market is excessively concentrated in the designated wholesale market. Besides sales must go through multiple stages of distribution leading to problems in freshness and stability of agricultural products and downward pressure on profit margins for producers. To solve the above mentioned issues, we propose a cloud service convergence direct deal distribution platform based on asynchronous-driven ***. The proposed platform can facilitate a variety of direct trading functions and also access to visualization information related to agricultural products, which may increase user confidence at an intermediary-free direct transactions platform. First, we describe the requirements of intermediary-free direct transactions of agricultural products and transaction entities. Next the database structure and transaction functions are designed and then implemented according to those requirements. Finally, an API based cloud convergence service structure is designed to provide the analyzed information to ensure a trustworthy system.

关键词： Transaction platform node.js cloud service MVC pattern server platform

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基于***博客系统的设计与实现

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电子设计工程 2022年第7期30卷 37-41页

作者：闵亮薛格格张玉欣赵彩西安交通大学城市学院计算机系陕西西安710018

越来越多的人选择通过博客发布自己的日常,及时有效地与他人进行交流。传统的博客系统普遍存在平均响应时间过长、事务成功率过低、CPU使用率过高、系统极限承载太低等问题。针对这些问题,该系统采用***开发环境的Web框架Express进行开... 详细信息

越来越多的人选择通过博客发布自己的日常,及时有效地与他人进行交流。传统的博客系统普遍存在平均响应时间过长、事务成功率过低、CPU使用率过高、系统极限承载太低等问题。针对这些问题,该系统采用***开发环境的Web框架Express进行开发,服务器端采用ECS云服务器,使用HTML、CSS、JavaScript、***、SQL技术编写代码。搭建框架主要有Bootstrap和Express,采用MySQL数据库存储数据,采用MVC思想构建代码块,将业务逻辑模块化整合。通过黑盒测试技术对博客系统的性能进行测试,结果表明,该系统响应时间不超过5 s,可支持至少500人同时在线并发,兼容IE8及IE8以上浏览器、Chrome浏览器、火狐浏览器、360浏览器、QQ浏览器等常用浏览器,后台功能满足目前博客基本功能需求,具有较高的用户信息安全保障,可以自由地更换前台需要展示的内容。

关键词： node.js Express框架 MVC MySQL数据库

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A Neural Network-Based Study of the Performance of a Developed Foreign Language Teaching System 5

A Neural Network-Based Study of the Performance of a Develop...

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5th International Conference on Computational Linguistics and Intelligent Systems (COLINS)

作者： Krupii, Oleh Kasian, Kostiantyn Zaporizhzhia Polytech Natl Univ 64 Zhukovsky Str UA-69063 Zaporizhzhia Ukraine

The purpose of the work is to provide high-quality study of foreign languages in the conditions of distance education. To achieve this goal it is necessary to perform the following tasks: to analyze and select technologies for the development of server and client part of the service;. determine the requirements for the service;design the service according to certain requirements;implement the service, using selected technologies;analyze the results..

关键词： Database web-service development web system foreign language courses node.js vue.js firebase neural network CEUR-WS

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基于***的股票行情浏览及分析系统的设计与实现

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作者：魏榆静山东大学

学位级别：硕士

金融市场对国家经济社会的发展起到十分重要的作用,股票交易不仅是一种企业融资模式,也是越来越多的个体投资者的理财方式。国内市场现存的股票系统基本都是C/S架构,安装过程繁琐,数据同步困难,且产品过于专业化,大多界面以及功能复杂,... 详细信息

金融市场对国家经济社会的发展起到十分重要的作用,股票交易不仅是一种企业融资模式,也是越来越多的个体投资者的理财方式。国内市场现存的股票系统基本都是C/S架构,安装过程繁琐,数据同步困难,且产品过于专业化,大多界面以及功能复杂,无法满足不同层次投资者的需求。对于新股民来说,除了要求基本的股票行情浏览功能外,还有交流学习、智能选股以及利用计算机进行数据分析帮助其智能决策的需求。因此,目前股票软件正在逐渐转变为以行情浏览为主的“行情+社交平台+智能分析+资讯浏览”的综合一体化股票软件服务平台。本文针对股票市场初级投资者的需求,结合互联网的新技术,设计与实现了基于***的B/S架构的股票行情浏览及分析系统。***的核心是基于事件驱动的异步I/O模型,该机制使服务器的并发能力得到明显提高,因此成为近几年流行的服务端技术。系统前端使用目前流行的***框架,组件化开发以及前后端分离模式大大提高了开发效率。由于股票数据结构复杂,基于MongoDB设计行情存储模式,配合***的json格式避免了类型转换,实现数据的持久化存储。同时结合Echarts框架以及H5 Canvas技术,通过多图表的可视化界面向用户直观的展示各种股票详情数据以及市场行情追踪。股票数据包括实时数据、分钟K线数据、日、月、年K线数据、公司行业信息、指标数据MACD,RSI,KDJ等;市场行情包括排行榜、龙虎榜、领涨个股、领涨板块等。系统一方面采用Redis数据库进行股票数据缓存,另一方面采用***即时通讯技术使服务器可以主动推送消息或股票数据到客户端来保证实时性。此外,本文还主要介绍了社交平台模块、预警模块、智能选股、自选股管理等功能,方便用户浏览行情数据及学习股票知识。考虑到系统的智能性,着眼于数据分析,不仅支持投资者根据交易风格自由更改指标参数以及导出数据进行本地分析,本文还提出了一种基于机器学习的MACD指标优化模型,该模型一定程度上缓解了传统MACD指标滞后性与股价震荡时错误信号频繁的问题,可在预警模块及时向用户发出买卖点的提醒信息。同时实现了一种基于ARIMA与LSTM神经网络的组合股价预测模型,通过先进的计算机技术向投资者提供合理建议。本文还从性能和安全方面进行了优化设计,包括数据库连接池,负载均衡,浏览器缓存等;并对常见的XSS、CSRF、SQL注入等网站攻击进行了防御,例如采用Token认证登录和Md5+Salt方式对用户信息加密存储的安全措施。

关键词： node.js Vue.js MACD指标股票分析

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An archive-exploration system for the Hunting Songs of the Lakeland Fell Packs 21

An archive-exploration system for the Hunting Songs of the L...

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8th International Conference on Digital Libraries for Musicology (DLfM)

作者： Emmett, Mary Yin, Zongyu Collins, Tom Univ York Dept Mus York N Yorkshire England Univ York Dept Comp Sci York N Yorkshire England Algorithms Inc Mus Artificial Intelligence Dublin OH USA

ISBN: (纸本)9781450384292

From everyday users to expert archivists, there is a keen interest in being able to search digital library catalogues via domain-specific languages and queries. This paper presents a proof-of-concept system that enables library users to search musically for songs or pieces that match to sung, hummed, or typed note queries. We chose to work with a corpus of 80 Lakeland Hunting Song tunes (Items) that have been collected recently, and for which the archivist wanted to make a resource that was easily searchable in terms of its musical content. Existing systems such as that at *** are robust to rhythmic changes but not to missing or interpolated notes, so we employed a geometric hashing approach as the basis for determining matches and as a potential improvement on existing work. An evaluation indicates that the system works quickly and effectively. We discuss some of the examples arising from its use, and indicate how future work building on this proof-of-concept system may make it possible to search other collections of songs or pieces in a more natural, musical way. Our archive-exploration system is available for trying out at https://***.

关键词： domain-specific queries music search geometric hashing ethnomusicology folk music node.js

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Smart Waste Management Using Microservices and Container-based Virtualization 23

Smart Waste Management Using Microservices and Container-bas...

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Proceedings of the 27th Pan-Hellenic Conference on Progress in Computing and Informatics

作者： Stilianos Karagiannakis Ioannis Theodoropoulos Apostolos Anagnostopoulos Basilis Mamalis Department of Informatics and Computer Engineering University of West Attica Greece

ISBN: (纸本)9798400716263

One of the most significant issues associated with smart city applications is solid waste management, which has a negative impact on our society's health and the environment. In this paper, a smart waste bin management approach with novel architectural design is proposed, based on modern container-based virtualization and microservices technologies. Its objective is twofold; first, efficient monitoring/tracking of waste bins, analyzing their data and taking further actions in case of out-of-limits values (i.e. with respect to fire danger, fill level etc.) for improving citizens health and daily life, and second, building a flexible application that can easily be deployed and managed in a distributed manner in any relevant environment, with use of modern orchestrators. Beyond the detailed architectural design, several implementation issues of our approach are thoroughly analyzed and discussed, as well as further extensions and initial performance evaluation.

关键词： Containers Internet of Things Microservices MongoDB node.js Redis Smart Waste Bin Waste Management

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Smart Contract enabled Online Examination System Based in Blockchain Network

Smart Contract enabled Online Examination System Based in Bl...

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11th International Conference of Computer Communication and Informatics (ICCCI)

作者： Jain, Apoorv Tripathi, Arun Kumar Chandra, Naresh Chinnasamy, P. Delhi NCR KIET Grp Inst Ghaziabad India Sri Shakthi Inst Engn & Technol Coimbatore Tamil Nadu India

ISBN: (纸本)9781728158754

In today's world, data is one of the most important assets than any other. Every user wants to secure their data from the outer world. Blockchain is the prominent technology that can provide the security and loyalty of data. Initially, blockchain has been used for the cryptocurrency and all the data were available on the public distributed ledger. But now a days, private Blockchain is widely used within the organizations for data security. Blockchain engenders decentralized systems in which data can be send and receive securely and efficiently over the network. It means there is everything is hidden from the outer world;only authorized users have the authority to read and write the data on the network. World's topmost industries;like Walmart, IBM, Google, etc. are adopting the blockchain technology to build the Decentralized Applications (DApps). Decentralized Applications are the smart systems that are executed on a distributed computer network. Blockchain enables one of the most secure applications called Smart Contract. Smart Contracts are the computerized and secured distributed ledgers that enable secure, transparent, and tamper-proof transactions. Smart contracts create and verify the data with the help of hashing. It is a mathematical procedure that uses the most powerful algorithm cryptographic Hash Algorithm i.e. SHA-256. It engenders 256-bit signature for the input text. Ethereum Blockchain Platform is a widely used platform to build the DApps. This platform is a public network platform, which is open to all and anyone can participate in this network to send and receives the transactions. Blockchain Technology is enabled in every sector like marketing, business, education and supply chain, etc. This paper carries out the study Ethereum Blockchain Platform in Education System. We have developed an application for the Online-Examination System using Blockchain Ethereum Platform with features of Smart Contracts that enables server runtime environment nodejs a

关键词： Blockchain Technology Smart-Contracts Ethereum Wallet MetaMask Remix_IDE node.js MongoDB and Ethereum

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基于***的博客系统的设计与实现

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中文科技期刊数据库（全文版）工程技术 2021年第7期 102-102,104页

作者：马文娟上海金桥信息科技有限公司上海200000

伴随当前知识经济的快速到来,知识逐步成为国家企业个人发展的核心力量,而互联网当中的知识碎片过于复杂,会导致搜索和筛选知识人焦虑,而通过博客等快捷的工具对某一领域的知识和经验进行收集整理成为当前的一个趋势。另外有一部分人渴... 详细信息

伴随当前知识经济的快速到来,知识逐步成为国家企业个人发展的核心力量,而互联网当中的知识碎片过于复杂,会导致搜索和筛选知识人焦虑,而通过博客等快捷的工具对某一领域的知识和经验进行收集整理成为当前的一个趋势。另外有一部分人渴望一个博客管理平台,该平台能够有效地对自己学习工作当中的知识进行记录和分享,而博客系统就可以实现该要求,但是当前国内外很多博客系统在设计方面没有重视博客原有的内涵,充斥着与文章无关的元素,容易而又复杂,用户急需一个高效简约的博客系统。本文分析一款基于***的简约化博客系统,能够精简地记录用户所需的知识,并且对各种知识进行分享,可以让用户快速了解自己感兴趣的信息,节省用户在搜索信息过程中的时间。该博客系统前端使用***+vue-router+iView,后端使用Koa,将功能模块分成用户部分、文章部分、分类搜索部分,在用户管理方面主要有访客、博主、管理员,各种身份的用户在操作过程中的权限各有不同,可以依照自身的需求精准地查询感兴趣的文章,使用户获得更好的体验,并且节省用户搜索知识的时间,为用户提供方便,提供用户的使用效率。

关键词： node.js 博客平台 Vue.js Koa 分类

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基于***的Web服务端框架研究与实现

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作者：唐榜西南科技大学

学位级别：硕士

***作为一门较新的语言,由于其异步I/O的特性,在高并发的I/O场景下比传统服务端语言的处理效率更高,近年来逐渐成为主流的服务端开发语言。由于***发展时间较短,目前基于***的Web服务端框架正处于发展阶段。本文通过对主流***的Web服务... 详细信息

***作为一门较新的语言,由于其异步I/O的特性,在高并发的I/O场景下比传统服务端语言的处理效率更高,近年来逐渐成为主流的服务端开发语言。由于***发展时间较短,目前基于***的Web服务端框架正处于发展阶段。本文通过对主流***的Web服务端框架进行分析,发现以下几个方面存在的不足:功能属性的配置信息定义在业务代码中,造成配置信息与业务代码混杂,带来代码维护上的不便;请求调度方式较为简单,在高并发的场景下容易造成请求丢失;静态资源的缓存策略较为单一,导致静态资源的加载效率不高;采用传统缓存替换算法进行缓存替换,在缓存空间有限的情况下,造成缓存命中率不高。针对上述问题,本文设计并实现了一款基于***的Web服务端框架,具体工作如下:本文首先对***服务端框架的发展现状进行了介绍,阐述了主流***服务端框架的优缺点。其次,结合实际开发场景,以模块化机制为基础,设计并实现了请求管理、参数处理、过滤、路由、会话管理和静态资源管理等Web服务端框架的核心功能模块。在此基础上,针对主流框架存在的不足,框架完成了以下几点优化:(1)通过配置文件对功能属性进行定义,将配置信息与业务代码分离,提高了代码的可维护性;(2)基于缓存队列设计了延迟调度方案,通过延迟调度实现了高并发场景下请求的错峰处理,降低了框架的请求错误率;(3)使用客户端与服务端缓存相结合的双缓存方案对静态资源进行缓存,减少请求次数和文件I/O操作,提高了框架的静态资源加载效率;(4)提出了一种基于高斯混合模型的缓存替换算法,通过高斯混合模型对窗口时间内会被再次访问的资源进行预测,根据预测结果进行缓存替换。实验结果表明,该算法与传统缓存替换算法相比有效提高了缓存命中率和字节命中率。最后,完成了框架的全面测试。测试结果表明,与主流***的Web服务端框架相比,本文所设计的框架在静态资源加载效率、请求错误率以及请求处理效率上有明显的优势,证明了框架设计的合理性。目前,本框架已在***的包管理平台npm上线,并且有了一定的下载量。

关键词： node.js Web服务端框架请求调度缓存替换

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Simplifying the Search of npm Packages

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INFORMATION AND SOFTWARE TECHNOLOGY 2020年 126卷 106365-106365页

作者： Abdellatif, Ahmad Zeng, Yi Elshafei, Mohamed Shihab, Emad Shang, Weiyi Concordia Univ Dept Comp Sci & Software Engn Montreal PQ Canada Data Driven Anal Software Lab Montreal PQ Canada Software Engn & Syst Engn Sense Lab Montreal PQ Canada

Context: Code reuse, generally done through software packages, allows developers to reduce time-to-market and improve code quality. The npm ecosystem is a *** package management system which contains more than 700 K *** packages and to help developers find high-quality packages that meet their needs, npms developed a search engine to rank *** packages in terms of quality, popularity, and maintenance. However, the current ranking mechanism for npms tends to be arbitrary and contains many different equations, which increases complexity and computation. Objective: The goal of this paper is to empirically improve the efficiency of npms by simplifying the used components without impacting the current npms package ranks. Method: We use feature selection methods with the aim of simplifying npms' equations. We remove the features that do not have a significant effect on the package's rank. Then, we study the impact of the simplified npms on the packages' rank, the amount of resources saved compared to the original npms, and the performance of the simplified npms as npm evolves. Results: Our findings indicate that (1) 31% of the unique variables of npms' equation can be removed without breaking the original packages' ranks;(2) The simplified npms, on average, preserves the overlapping of the packages by 98% and the ranking of those packages by 97%;(3) Using the simplified npms saves 10% of packages scoring time and more than 1.47 million network requests on each scoring run;(4) As the npm evolve through a period of 12 months, the simplified-npms was able to achieve results similar to the original npms. Conclusion: Our results show that the simplified npms preserves the original ranks of packages and is more efficient than the original npms. We believe that using our approach, helps the npms community speed up the scoring process by saving computational resources and time.

关键词： JavaScript NPM node.js NPMS Code reuse Empirical studies

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