检索结果-内蒙古大学图书馆

The Journal of Machine Learning Research 2024年第1期25卷 5481-5536页

作者： Junpei Komiyama Edouard Fouché Junya Honda Stern School of Business New York University Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany Department of Systems Science Graduate School of Informatics Kyoto University Japan Center for Advanced Intelligence Project RIKEN Japan

We consider nonstationary multi-armed bandit problems where the model parameters of the arms change over time. We introduce the adaptive resetting bandit (ADR-bandit), a bandit algorithm class that leverages adaptive windowing techniques from literature on data streams. We first provide new guarantees on the quality of estimators resulting from adaptive windowing techniques, which are of independent interest. Furthermore, we conduct a finite-time analysis of ADR-bandit in two typical environments: an abrupt environment where changes occur instantaneously and a gradual environment where changes occur progressively. We demonstrate that ADR-bandit has nearly optimal performance when abrupt or gradual changes occur in a coordinated manner that we call global changes. We demonstrate that forced exploration is unnecessary when we assume such global changes. Unlike the existing nonstationary bandit algorithms, ADR-bandit has optimal performance in stationary environments as well as nonstationary environments with global changes. Our experiments show that the proposed algorithms outperform the existing approaches in synthetic and real-world environments.

关键词： multi-armed bandits adaptive windows nonstationary bandits changepoint detection sequential learning

来源：评论

学校读者我要写书评

暂无评论

Automatic generation of virtual assistants from databases using active ontologies 31

Automatic generation of virtual assistants from databases us...

引用

31st International Conference on Software Engineering and Knowledge Engineering, SEKE 2019

作者： Blersch, Martin Weigelt, Sebastian Tichy, Walter F. Angele, Kevin Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Karlsruhe Germany Semantic Technology Institute University of Innsbruck Innsbruck Austria ONLIM GmbH Telfs Austria

ISBN: (纸本)1891706489

Virtual assistants such as Siri or Google Assistant are omnipresent. However, their development remains costly. One must either manually model the problem domain or provide thousands of labeled samples. We propose to automatically create virtual assistants based on Active Ontologies for interacting with databases. Our approach generates Active Ontologies;we use the database structure to derive a concept hierarchy and database values together with synonyms to extract information from user queries. Our approach also learns common phrases from samples, e.g. from existing Dialogflow agents. We extract pre- and postfixes and attach them to concepts, e.g. at to detect a succeeding location. The generated Active Ontologies reply to previously unseen and composed requests. The approach is not limited to virtual assistants but can be applied to any system with a textual or voice-based conversational interface such as chatbots. We evaluate our approach in three domains: tourism, hotel, and web cams. The study shows that automatically generated Active Ontologies extract relevant information from user utterances with a precision of 58%. The precision increases to 79% (recall 46%, F1 58%) when we use sample utterances. Our approach successfully transfers between domains, e.g. we learn phrases from the tourism domain and use them to reply to hotel requests without any adjustments. © 2019 Knowledge Systems institute Graduate School. All rights reserved.

关键词： Ontology

来源：评论

学校读者我要写书评

暂无评论

Finite-time Analysis of Globally Nonstationary Multi-Armed Bandits

arXiv

引用

arXiv 2021年

作者： Komiyama, Junpei Fouché, Edouard Honda, Junya Stern School of Business New York University 44 West 4th Street New YorkNY United States Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Am Fasanengarten 5 Karlsruhe76131 Germany Department of Systems Science Graduate School of Informatics Kyoto University Yoshida Honmachi Sakyo-ku Kyoto606-8501 Japan

关键词：

来源：评论

学校读者我要写书评

暂无评论

Collaborative modeling enabled by version control

Collaborative modeling enabled by version control

引用

Fachtagung Modellierung, 2018

作者： Kuryazov, Dilshod Winter, Andreas Reussner, Ralf University of Oldenburg Software Engineering Group Uhlhornsweg 84 Oldenburg26111 Germany Karlsruhe Institute of Technology Institute for Program Structures and Data Organization Postfach 6980 KarlsruheD-76128 Germany

ISBN: (纸本)9783885796749

Model-Driven Software Development is a key field in software development activities which is well-suited to design and develop large-scale software systems. Developing and maintaining large-scale model-driven software systems entail a need for collaborative modeling by a large number of software designers and developers. As long as software models are constantly changed during development and maintenance, collaborative modeling requires frequently sharing of model changes between collaborators. Thereby, a solid change representation support for model changes plays an essential role for collaborative modeling systems. This paper focuses on the problem of model change representation for collaborative modeling. It introduces a meta-model generic, operation-based and textual difference language to represent model changes in collaborative modeling. This paper also demonstrates a collaborative modeling application Kotelett. © 2018 Gesellschaft fur Informatik (GI).

关键词： Software design

来源：评论

学校读者我要写书评

暂无评论

A Collection of Software Engineering Challenges for Big data System Development

A Collection of Software Engineering Challenges for Big Data...

引用

Euromicro Conference on Software Engineering and Advanced Applications (SEAA)

作者： Oliver Hummel Holger Eichelberger Andreas Giloj Dominik Werle Klaus Schmid Faculty of Computer Science Mannheim University of Applied Sciences Software Systems Engineering University of Hildesheim Institute for Program Structures and Data Organization Karlsruhe Institute of Technology

ISBN: (纸本)9781538673843

In recent years, the development of systems for processing and analyzing large amounts of data (so-called Big data) has become an important sub-discipline of software engineering. However, to date there exits no comprehensive summary of the specific idiosyncrasies and challenges that the development of Big data systems imposes on software engineers. With this paper, we aim to provide a first step towards filling this gap based on our collective experience from industry and academic projects as well as from consulting and initial literature reviews. The main contribution of our work is a concise summary of 26 challenges in engineering Big data systems, collected and consolidated by means of a systematic identification process. The aim is to make practitioners more aware of common challenges and to offer researchers a solid baseline for identifying novel software engineering research directions.

关键词： Big data Software Software engineering Computer architecture data analysis data privacy Systematics

来源：评论

学校读者我要写书评

暂无评论

Towards a common classification of changes for information and automated production systems as precondition for maintenance effort estimation

Towards a common classification of changes for information a...

引用

IEEE International Conference on Industrial Informatics (INDIN)

作者： Birgit Vogel-Heuser Thomas Simon Jens Folmer Robert Heinrich Kiana Rostami Ralf Reussner Institute of Automation and Information Systems Technical University of Munich Munich Germany Institute for Program Structures and Data Organization Karlsruhe Institute of Technologies Karlsruhe Germany

ISBN: (纸本)9781509028719

Both information and automated production systems (aPS) evolve during their lifetime, e.g. due to changes in requirements and infrastructure. In order to estimate maintenance effort in information systems the KAMP method is applied. This paper discusses the necessary classification of changes as a prerequisite to apply such a method. Aggravating aPS consist not only of software but also include mechanics and electric/automation hardware. Therefore, the classification has to be enlarged to a multi-disciplinary one. The limitations of this approach for aPS are discussed in detail and demonstrated using three scenarios of a lab size pick and place unit. The paper closes delivering first ideas to cope with these.

关键词： Software Hardware Maintenance engineering Computer architecture Voltage control Cranes Production systems

来源：评论

学校读者我要写书评

暂无评论

Recovering traceability links between code and specification through domain model extraction

Lecture Notes in Business Information Processing

引用

Lecture Notes in Business Information Processing 2014年 191卷 187-201页

作者： Vinárek, Jirři Hnětynka, Petr Šimko, Viliam Kroha, Petr Institute for Program Structures and Data Organisation Karlsruhe Institute of Technology Karlsruhe Germany Department of Distributed and Dependable Systems Charles University in Prague Malostranske namesti 25 Prague Czech Republic

Requirements traceability is an extremely important aspect of software development and especially of maintenance. Efficient maintaining of traceability links between high-level requirements specification and low-level implementation is hindered by many problems. In this paper, we propose a method for automated recovery of links between parts of the textual requirement specification and the source code of implementation. The described method is based on a method allowing extraction of a prototype domain model from plain text requirements specification. The proposed method is evaluated on two non-trivial examples. The performed experiments show that our method is able to link requirements with source code with the accuracy of F1 = 58 - 61%. © Springer International Publishing Switzerland 2014.

关键词： Specifications

来源：评论

学校读者我要写书评

暂无评论

An unabridged source code dataset for research in software reuse

An unabridged source code dataset for research in software r...

引用

International Mining Software Repositories, MSR

作者： Werner Janjic Oliver Hummel Marcus Schumacher Colin Atkinson Software-Engineering Group University of Mannheim Germany Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany

ISBN: (纸本)9781467329347

This paper describes a large, unabridged data-set of Java source code gathered and shared as part of the Merobase Component Finder project of the Software-Engineering Group at the university of Mannheim. It consists of the complete index used to drive the search engine, ***, the vast majority 1 of the source code modules accessible through it, and a tool that enables researchers to efficiently browse the collected data. We describe the techniques used to collect, format and store the data set, as well as the core capabilities of the Merobase search engine such as classic keyword-based, interface-based and test-driven search. This data-set, which represents one of the largest searchable collections of source and binary modules available online, has been recently made available for download and use in further research projects. All files are available at http://***/sources/.

关键词： Indexes Java Search engines Relational databases Containers Open source software

来源：评论

学校读者我要写书评

暂无评论

Strategic provider selection in a policy-based helping scenario

Strategic provider selection in a policy-based helping scena...

引用

12th IEEE Conference on Commerce and Enterprise Computing, CEC 2010

作者： Hütter, Christian Yue, Jing Zhi Von Der Weth, Christian Böhm, Klemens Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany School of Computer Engineering Nanyang Technological University Singapore

ISBN: (纸本)9780769542287

In service-oriented computing, software agents interact by requesting and providing services. Since providing a service incurs cost, uncooperative behavior dominates in the absence of an incentive mechanism. An economic model that describes interactions between individuals is the Helping. Game. There, pairs of requester and provider are randomly matched. In various real-world applications in turn, several providers offer similar services, and requesters have a choice of providers. The rationale behind strategic provider selection is to choose the provider that is most likely to perform the task as desired. The results from existing studies of the Helping Game are not directly applicable to settings with provider selection. To analyze how strategic provider selection affects the efficiency of enterprise systems, we have designed and carried out an experimental study. Our results show that cooperative participants receive significantly more requests than uncooperative ones, making cooperation expensive. We conclude that system designers must incentivize requesters to balance their tasks between providers. © 2010 IEEE.

关键词： Software agents

来源：评论

学校读者我要写书评

暂无评论

Stochastic performance analysis and capacity planning of publish/subscribe systems 10

Stochastic performance analysis and capacity planning of pub...

引用

4th ACM International Conference on Distributed Event-Based Systems, DEBS 2010

作者： Schröter, Arnd Mühl, Gero Kounev, Samuel Parzyjegla, Helge Richling, Jan Communication and Operating Systems Group Berlin University of Technology Germany Architecture of Application Systems University of Rostock Germany Institute for Program Structures and Data Organization Karlsruhe Institute of Technology Germany

ISBN: (纸本)9781605589275

Publish/subscribe systems are used increasingly often as a communication mechanism in loosely-coupled distributed applications. With their gradual adoption in mission critical areas, it is essential that systems are subjected to a rigorous performance analysis before they are put into production. However, existing approaches to performance modeling and analysis of publish/subscribe systems suffer from many limitations that seriously constrain their practical applicability. In this paper, we present a set of generalized and comprehensive analytical models of publish/subscribe systems employing different peer-to-peer and hierarchical routing schemes. The proposed analytical models address the major limitations underlying existing work in this area and are the first to consider all major performance-relevant system metrics including the expected broker and link utilization, the expected notification delay, the expected time required for new subscriptions to become fully active, as well as the expected routing table sizes and message rates. To illustrate our approach and demonstrate its effectiveness and practicality, we present a case study showing how our models can be exploited for capacity planning and performance prediction in a realistic scenario. © 2010 ACM.

关键词： Analytical models

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：