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Software techniques for Internet Computing:Current situation and future trend

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Chinese Science Bulletin 2010年第31期55卷 3510-3516页

作者： MEI Hong liu xuanzhe Key Laboratory of High Confidence Software Technologies(Peking University) Ministry of EducationBeijing 100871China School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China

The fast development of the Internet has extended wider space for Information and Communications Technology(ICT),and it has brought a series of challenges for traditional software theories,models,approaches and *** paper looks back some popular Internet-based new computing paradigms and application schemas,discusses the current status and the future trend of software technologies for Internet Computing,including topics of software model,software runtime supporting platform,software development methodologies and software quality measurement and assurance.

关键词： Internet software technique software methodology Internetware

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LegoDroid: flexible Android app decomposition and instant installation

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Science China(Information Sciences) 2023年第4期66卷 155-173页

作者： Yi liu Yun MA Xusheng XIAO Tao XIE xuanzhe liu School of Computer Science Peking University Key Laboratory of High Confidence Software Technologies(Peking University) Ministry of Education Institute for Artificial Intelligence Peking University Department of Computer and Data Sciences Case Western Reserve University

Current mobile applications(apps) have become increasingly complicated with increasing features that are represented on the graphical user interface associated with application programming interfaces(APIs) to access backend functionality and data. Meanwhile, apps suffer from the “software bloat” in volume. Some app features may be redundant, with respect to those features(from other apps) that the users already desirably and frequently use. However, the current app release model forces users to download and install a full-size installation package rather than optionally choosing only their desired features. Large-size apps can not only increase the local resource consumption, such as CPU, memory, and energy, but also inevitably compromise the user experience, such as the slow load time in the app. In this article, we first conduct an empirical study to characterize the app feature usage when users interact with Android apps,and surprisingly find that users access only a very small subset of app features. Based on these findings,we design a new approach named Lego Droid, which automatically decomposes an Android app for flexible loading and installation, while preserving the expected functionality with a fast and instant app load. With such a method, a slimmer bundle will be downloaded and host the target APIs inside the original app to satisfy users’ requirements. We implement a system for Lego Droid and evaluate it with 1000 real-world Android apps. Compared to the original full-size apps, apps optimized by Lego Droid can substantially improve the load time by reducing the base bundle and feature bundles by 13.06% and 10.93%, respectively,along with the app-package installation size by 44.17%. In addition, we also demonstrate that Lego Droid is quite practical with evolving versions, as it can produce substantial reusable code to alleviate the developers’ efforts when releasing new app versions.

关键词： performance software bloat instant installation mobile applications program analysis

Towards module-based automatic partitioning of Java applications

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Frontiers of Computer Science 2012年第6期6卷 725-740页

作者： Ying ZHANG Gang HUANG Wei ZHANG xuanzhe liu Hong MEI Key Laboratory of High Confidence Software Technologies(Peking University) Ministry of EducationBeijing 100871China School of Electronics Engineering and Computer Science Peking UniversityBeijing 100871China

When reengineering a monolithic application to be a distributed one, programmers always have to decide how many distributed parts the application should be partitioned, and write many codes related to where a part will be placed on network nodes and how these parts communicate with each other through the network. These codes usually have nothing to do with the business functions of the application, and they are laborious to write. In addition, as the distribution architecture of the application is finalized beforehand, it may not adapt well to the everchanging execution environment. In this paper, we propose DPartner, an automatic partitioning system, to help programmers create a distributed Java application without explicitly writing the distribution-related codes. Unlike the other partitioning systems, DPartner does not partition an application directly into the coarse-grained client and server. Instead, it first partitions the application into several modules where each module performs a relatively independent business function of the application. Then it makes these modules be distributable through automatic bytecode rewriting. These modules can distribute in different nodes and cooperate to work just as the original monolithic application. Such a module-based partitioning approach enables a relatively easy reshaping of the distribution architecture of an application, which facilitates the application adapt to the environmental changes without manual recoding or repartitioning with regard to distribution. This paper gives the detailed design of DPartner, and evaluates it using real-world applications. The evaluation results demonstrate the effectiveness and efficiency of DPartner.

关键词： application partitioning distributed computing,DPartner

DelayD roid: an instrumented approach to reducing tail-time energy of Android apps

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Science China(Information Sciences) 2017年第1期60卷 84-99页

作者： Gang HUANG Huaqian CAI Maciej SWIECH Ying ZHANG xuanzhe liu Peter DINDA School of Electronics Engineering and Computer Science Peking University Department of Electrical Engineering and Computer Science Northwestern University

Mobile devices with 3G/4G networking often waste energy in the so-called "tail time" during which the radio is kept on even though no communication is occurring. Prior work has proposed policies to reduce this energy waste by batching network requests. However, this work is challenging to apply in practice due to a lack of mechanisms. In response, we have developed DelayD roid, a framework that allows a developer to add the needed policy to existing, unmodified Android applications(apps) with no human effort as well as no SDK/OS changes. This allows such prior work(as well as our own policies) to be readily deployed and evaluated. The DelayD roid compile-time uses static analysis and bytecode refactoring to identify method calls that send network requests and modify such calls to detour them to the DelayD roid run-time. The run-time then applies a policy to batch them, avoiding the tail time energy waste. DelayD roid also includes a cross-app communication mechanism that supports policies that optimize across multiple apps running together, and we propose a policy that does so. We evaluated the correctness and universality of the DelayD roid mechanisms on14 popular Android apps chosen from the Google App Store. To evaluate our proposed policy, we studied three DelayD roid-enabled apps(weather forecasting, email client, and news client) running together, finding that the DelayD roid mechanisms combined with our policy can reduce 3G/4G tail time energy waste by 36%.

关键词： refactor Android optimization energy network scheduling

Data-driven synthesis of multiple recommendation patterns to create situational Web mashups

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Science China(Information Sciences) 2013年第8期56卷 137-152页

作者： MA Yun LU Xuan liu xuanzhe WANG XuDong BLAKE M.Brian Key Laboratory of High Confidence Software Technologies(Peking University) Ministry of Education University of Miami

As a typical situational application,Web mashup reflects and accommodates some key features of Internetware *** provides a development fashion that integrates data,computation and UI elements from multiple resources into a single Web application,and promises the quick rollout of creating potential new functionalities *** paper focuses on the problem of recommending useful suggestions for developing data-driven mashups by synthesis of multiple *** present a rapid and intuitive system called iMashupAdvisor,for aiding mashup development based on a novel automated suggestion *** key observation guiding the development of iMashupAdvisor is that mashups developed by different users might share some common patterns,for instance,selecting similar mashup components for similar goals,and gluing them in a similar *** patterns could reside in multiple sources,e.g.,the data dependency between mashup components,the interaction between users and mashup components,or the collective intelligence from existing applications created and maintained by programmers,*** leverages the synthesis of these patterns to recommend useful suggestions for a partial mashup,such as the missing components,connections between them,or potentially relevant options,to assist mashup *** paper presents the data model and ranking metrics of the synthesis process,and introduces efficient algorithms for the retrieval of *** also experimentally demonstrate the efficiency of our approach for benefiting the proposed rapid mashup development.

关键词： mashup Internetware recommendation data-driven model situational

iMashup:a mashup-based framework for service composition

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Science China(Information Sciences) 2014年第1期57卷 5-24页

作者： liu xuanzhe HUANG Gang ZHAO Qi MEI Hong BLAKE M.Brian Key Laboratory of High Confidence Software Technologies (Peking University) Ministry of Education School of Electronics Engineering and Computer Science Peking University Department of Computer Science and Engineering University of Notre Dame

The Web has undergone a tremendous change from a primarily publication platform towards a participatory and"programmable"platform,where a large number of heterogeneous Web-delivered services(including SOAP and RESTful Web services,RSS and Atom feeds)are *** results in the creation of Web mashup applications with rich user ***,the integration of Web-delivered services is still a challenging *** not only requires the developers’tedious eforts in understanding and coordinating heterogeneous service types,but also results in the time-consuming development of user *** this paper,we propose the iMashup composition framework to facilitate mashup development and *** provide a unified mashup component model for the common representation of heterogeneous Web-delivered service *** component model specifies necessary properties and behaviors at both business and user interface *** associate the component model with semantically meaningful tags,so that mashup developers can fast understand the service *** mashup developers can search and put the proper mashup components into the Web browser based composition environment,and connect them by data flows based on the tag-based *** an integration manner might prevent some low-level programming eforts and improve the composition efciency.A series of experimental study are conducted to evaluate our framework.

关键词： service composition mashup component model Web-delivered service

An FPS-ZM1-encapsulated zeolitic imidazolate framework as a dual proangiogenic drug delivery system for diabetic wound healing

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Nano Research 2022年第6期15卷 5216-5229页

作者： Yi Sun Bingbo Bao Yu Zhu Junjie Shen xuanzhe liu Tao Gao Junqing Lin Tengli Huang Jia Xu Yimin Chai Xianyou Zheng Department of Orthopedic Surgery Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China Institute of Microsurgery on Extremities Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China

Inhibitors that target diabetes pathology-related signaling pathways have great therapeutic potential for diabetic wound ***–organic frameworks(MOFs)are increasingly popular drug delivery systems that have high loading capacity and can release their intrinsic metal ions to act as bioactive *** light of this,a receptor for advanced glycation end products(RAGE)inhibitor,4-chloro-N-cyclohexyl-N-(phenylmethyl)-benzamide(FPS-ZM1),was loaded into a cobalt(Co)-based MOF(zeolitic imidazolate framework-67,ZIF-67)to fabricate FPS-ZM1 encapsulated ZIF-67(FZ@ZIF-67)nanoparticles(NPs).As a result,FZ@ZIF-67 NPs could dually deliver Co ions and FPS-ZM1 in a controlled manner for over 14 *** in vitro study showed that FZ@ZIF-67 NPs not only enhanced angiogenesis by delivering Co ions but also released FPS-ZM1 to promote M2 macrophage polarization and attenuated high glucose(HG)-and/or inflammation-induced impairment of angiogenesis through RAGE ***,in an in vivo study,FZ@ZIF-67 NPs markedly improved re-epithelialization,collagen deposition,neovascularization,and relieved inflammation in diabetic wounds in *** study not only provides a low-cost,effective,and synergistic proangiogenic bioactive agent but also demonstrates that targeting diabetes-related pathological signaling pathways is necessary to ameliorate vascularization impairment during diabetic wound healing.

关键词： zeolitic imidazolate framework-67 drug delivery dual-controlled release angiogenesis diabetic wound

A community-centric approach to automated service composition

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Chinese Science Bulletin 2010年第13期55卷 1344-1344页

作者： liu xuanzhe

In recent years, the Internet has been evolving from a primarily publication platform to a user participatory platform. With the proliferation of services available on the Internet, millions of users are able to volun... 详细信息

关键词：服务组合自动化社区用户参与互联网挑战性平台

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网构软件研究:回顾与展望

科学通报 2022年第32期67卷 3780-3792页

作者：梅宏黄罡刘譞哲张颖北京大学计算机学院北京100871 高可信软件技术教育部重点实验室(北京大学) 北京100871

软件作为计算系统的“灵魂”,是信息技术产业的核心组成部分,也正在成为数字经济时代支撑社会运行的重要“基础设施”.进入21世纪以来,互联网及其延伸网络形成了开放、动态、难控的复杂计算环境,对传统的软件范型与技术提出了巨大挑战,... 详细信息

软件作为计算系统的“灵魂”,是信息技术产业的核心组成部分,也正在成为数字经济时代支撑社会运行的重要“基础设施”.进入21世纪以来,互联网及其延伸网络形成了开放、动态、难控的复杂计算环境,对传统的软件范型与技术提出了巨大挑战,也蕴含了技术体系重大变革的新机遇.来自北京大学、南京大学和中国科学院的学者于2000年提出“网构软件”这一面向互联网的新型软件范型,经过20余年的努力,在其基本模型、开发方法、运行支撑和质量评估与保障等方面,均取得一系列重要的研究进展,形成了系统化的创新成果,产生了广泛的学术和产业影响.本文从软件范型入手,以互联网及其延伸网络形成的复杂计算环境为线索,回顾网构软件的研究进展,并展望未来的研究工作.

关键词：互联网软件范型网构软件软件体系结构

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