检索结果-内蒙古大学图书馆

ACM/IEEE 44th International Conference on Software Engineering (ICSE)

作者： Florez, Juan Manuel Perry, Jonathan Wei, Shiyi Marcus, Andrian Univ Texas Dallas Richardson TX 75083 USA

ISBN: (纸本)9781450392211

Business rules are an important part of the requirements of software systems that are meant to support an organization. These rules describe the operations, definitions, and constraints that apply to the organization. Within the software system, business rules are often translated into constraints on the values that are required or allowed for data, called data constraints. Business rules are subject to frequent changes, which in turn require changes to the corresponding data constraints in the software. The ability to efficiently and precisely identify where data constraints are implemented in the source code is essential for performing such necessary changes. In this paper, we introduce Lasso, the first technique that automatically retrieves the method and line of code where a given data constraint is enforced. Lasso is based on traceability link recovery approaches and leverages results from recent research that identified line-of-code level implementation patterns for data constraints. We implement three versions of Lasso that can retrieve data constraint implementations when they are implemented with any one of 13 frequently occurring patterns. We evaluate the three versions on a set of 299 data constraints from 15 real-world Java systems, and find that they improve method-level link recovery by 30%, 70%, and 163%, in terms of true positives within the first 10 results, compared to their text-retrieval-based baseline. More importantly, the Lasso variants correctly identify the line of code implementing the constraint inside the methods for 68% of the 299 constraints.

关键词： business rule data constraint traceability link recovery empirical study fine-grained traceability code pattern

来源：评论

学校读者我要写书评

暂无评论

Engineering of Framework-Specific Modeling Languages

引用

IEEE TRANSACTIONS ON SOFTWARE ENGINEERING 2009年第6期35卷 795-824页

作者： Antkiewicz, Michal Czarnecki, Krzysztof Stephan, Matthew Univ Waterloo Dept Elect & Comp Engn Waterloo ON N2L 3G1 Canada

Framework-specific modeling languages (FSMLs) help developers build applications based on object-oriented frameworks. FSMLs model abstractions and rules of application programming interfaces (APIs) exposed by frameworks and can express models of how applications use APIs. Such models aid developers in understanding, creating, and evolving application code. We present four exemplar FSMLs and a method for engineering new FSMLs. The method was created postmortem by generalizing the experience of building the exemplars and by specializing existing approaches to domain analysis, software development, and quality evaluation of models and languages. The method is driven by the use cases that the FSML under development should support and the evaluation of the constructed FSML is guided by two existing quality frameworks. The method description provides concrete examples for the engineering steps, outcomes, and challenges. It also provides strategies for making engineering decisions. Our work offers a concrete example of software language engineering and its benefits. FSMLs capture existing domain knowledge in language form and support application code understanding through reverse engineering, application code creation through forward engineering, and application code evolution through round-trip engineering.

关键词： Framework-specific modeling language domain-specific language object-oriented framework application programming interface (API) feature model framework-specific model forward engineering reverse engineering round-trip engineering evolution code pattern mapping

来源：评论

学校读者我要写书评

暂无评论

Mode division multiple access: a new scheme based on orbital angular momentum in millimetre wave communications for fifth generation

引用

IET COMMUNICATIONS 2018年第12期12卷 1416-1421页

作者： Wang, Lei Jiang, Fa Yuan, Zhe Yang, Jie Gui, Guan Sari, Hikmet Nanjing Univ Posts & Telecommun Natl & Local Joint Engn Lab RF Integrat & Microas Nanjing 210003 Jiangsu Peoples R China Xidian Univ State Key Lab Integrated Serv Networks Xian 710071 Shaanxi Peoples R China

Compared with the conventional degrees of freedom, the orbital angular momentum (OAM), which describes the helical phase structure of electromagnetic wave, provides a new degree of freedom. As a new multiple access scheme, mode division multiple access (MDMA) is constructed in millimetre wave frequency band utilising the orthogonality and high dimensionality in this study. Various traditional resources such as frequency, time and code pattern have been shared. Therefore, addresses of signals from different terminal users can be distinguished by OAM mode to realise multi-address connection. In this study, the theoretical analysis of the number of terminals in MDMA scheme is carried out. According to the analysis results, infinite terminals can be connected together in the ideal case. Moreover, the simulation results show that compared with the conventional multi-input multi-output millimetre wave communication systems, the performance indicators of MDMA millimetre wave communication systems are improved remarkably.

关键词： MIMO communication 5G mobile communication code pattern OAM mode multiaddress connection MDMA scheme conventional multiinput multioutput millimetre wave communication systems mode division multiple access orbital angular momentum millimetre wave communications fifth generation helical phase structure electromagnetic wave degree of freedom multiple access scheme millimetre wave frequency band time pattern terminal users

来源：评论

学校读者我要写书评

暂无评论

A New Data Transfer Method via Signal-Rich-Art code Images Captured by Mobile Devices

引用

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2015年第4期25卷 688-700页

作者： Lee, Ya-Lin Tsai, Wen-Hsiang Natl Chiao Tung Univ Inst Comp Sci & Engn Hsinchu 30010 Taiwan Natl Chiao Tung Univ Dept Comp Sci Hsinchu 30010 Taiwan Asia Univ Dept Informat Commun Taichung 41354 Taiwan

A new type of signal-rich-art image for applications of data transfer, called signal-rich-art code image, is proposed. The created code image is visually similar to a preselected target image and, with a given message embedded, achieves the effect of the so-called signal-rich art. With its function similar to that of a QR code, such a type of image is produced by encoding the message into a binary bit stream, representing the bits by binary code patterns of 2 x 2 blocks, and injecting the patterns into the target image by a novel image-block luminance modulation scheme. Each signal-rich-art code image may be printed or displayed and then is recaptured using a mobile-device camera. Skillful techniques for counting the number of pattern blocks and recognition of code patterns are also proposed for message extraction from the recaptured version of the signal-rich-art code image. Good experimental results and a comparison of them with those of an existing alternative method show the feasibility and superiority of the proposed new data transfer method.

关键词： Barcode code pattern data transfer QR code signal-rich art signal-rich-art code image

来源：评论

学校读者我要写书评

暂无评论

Towards an understanding of memory leak patterns: an empirical study in Python

引用

SOFTWARE QUALITY JOURNAL 2023年第4期31卷 1303-1330页

作者： Chen, Jie Yu, Dongjin Hu, Haiyang Hangzhou Dianzi Univ Sch Comp Sci & Technol Hangzhou 310018 Zhejiang Peoples R China

Memory leaks, an important and difficult issue in software development, occur when an object is inadvertently retained longer than necessary. Programming languages provide a variety of dynamic memory management methods to support programmers in preventing the introduction of defects that cause memory leaks. However, it is not yet possible to completely free programmers from the work of memory management. Indeed, runtime leak detection is time consuming and usually done after the fact, while manual code inspection requires rich developer experience. Understanding the common patterns of memory leaks can help developers be mindful of leaks or avoid them at an earlier stage during the development process and may further inspire future research. Eight code patterns are found in our case study specifically for memory leaks caused by circular references in Python. The observed patterns can explain 91.64% of the memory leaks in the studied projects. Our work can guide important decisions about the possibility of identifying memory leaks with static code analysis.

关键词： Memory leak Circular reference code pattern

来源：评论

学校读者我要写书评

暂无评论

Model-based assisted migration of oracle forms applications: The overall process in an industrial setting

引用

SOFTWARE-PRACTICE & EXPERIENCE 2021年第8期51卷 1641-1675页

作者： Rodriguez, Cristo Garces, Kelly Cabot, Jordi Casallas, Rubby Melo, Fabian Escobar, Daniel Salamanca, Alejandro Asesoftware Bogota Colombia Univ Andes Sch Engn Dept Syst & Comp Engn Bogota Colombia UOC ICREA Barcelona Spain

The migration of software is an economically important niche since the daily operations of many business still rely on systems based on legacy technologies. Migration to more recent technologies comes with major technical and management challenges mainly related to knowledge-loss issues on the specific technology but also on the architecture and design of the legacy. This article presents a method that addresses the reverse/forward engineering tasks as well as some management challenges such as the planning of the migration based on a better understanding of the system. The process relies on the use of models and transformations to create high-level abstraction views of the legacy. A big challenge with the migration of certain legacy applications is that much of the business logic is inside triggers which are written in the PL/SQL language and scattered across the application layers. Therefore, developers need to know what they need to migrate and where it is. The main contribution of our work is that the abstractions allow developers to understand and plan the migration without the need of having a vast knowledge on the initial technology. Furthermore, our views help developers to decide about the structure and business logic they want to have in the target system. In this article, we describe the application of the method to the Oracle Forms case study. Nevertheless, the approach can be generalized to other technologies through new bridges that transform from said technologies to the abstract views. The article ends by reporting lessons learned from our experience.

关键词： code pattern discovery model‐ driven engineering modernization PL SQL visualizations

来源：评论

学校读者我要写书评

暂无评论

From API to NLI: A new interface for library reuse

引用

JOURNAL OF SYSTEMS AND SOFTWARE 2020年 169卷 110728-110728页

作者： Shen, Qi Wu, Shijun Zou, Yanzhen Zhu, Zixiao Xie, Bing Minist Educ Key Lab High Confidence Software Technol Beijing 100871 Peoples R China Peking Univ Sch Elect Engn & Comp Sci Beijing 100871 Peoples R China IBM Res Beijing 100191 Peoples R China

Developers frequently reuse APIs from existing libraries to implement certain functionality. However, learning APIs is difficult due to their large scale and complexity. In this paper, we design an abstract framework NLI2code to ease the reuse process. Under the framework, users can reuse library functionalities with a high-level, automatically-generated NLI (Natural Language Interface) instead of the detailed API elements. The framework consists of three components: a functional feature extractor to summarize the frequently-used library functions in natural language form, a code pattern miner to give a code template for each functional feature, and a synthesizer to complete code patterns into well-typed snippets. From the perspective of a user, a reuse task under NLI2code starts from choosing a functional feature and our framework will guide the user to synthesize the desired solution. We instantiated the framework as a tool to reuse Java libraries. The evaluation shows our tool can generate a high-quality natural language interface and save half of the coding time for newcomers to solve real-world programming tasks. (C) 2020 Elsevier Inc. All rights reserved.

关键词： Library reuse code pattern Program synthesis

来源：评论

学校读者我要写书评

暂无评论

A New code Obfuscation Scheme for Software Protection

A New Code Obfuscation Scheme for Software Protection

引用

8th IEEE International Symposium on Service Oriented System Engineering (SOSE)

作者： Kulkarni, Aniket Metta, Ravindra Tata Consultancy Serv TCS Res Pune 411013 Maharashtra India

ISBN: (纸本)9781479936168

IT industry loses tens of billions of dollars annually from security attacks such as tampering and malicious reverse engineering. code obfuscation techniques counter such attacks by transforming code into patterns that resist the attacks. None of the current code obfuscation techniques satisfy all the obfuscation effectiveness criteria such as resistance to reverse engineering attacks and state space increase. To address this, we introduce new code patterns that we call nontrivial code clones and propose a new obfuscation scheme that combines nontrivial clones with existing obfuscation techniques to satisfy all the effectiveness criteria. The nontrivial code clones need to be constructed manually, thus adding to the development cost. This cost can be limited by cloning only the code fragments that need protection and by reusing the clones across projects. This makes it worthwhile considering the security risks. In this paper, we present our scheme and illustrate it with a toy example.

关键词： codes Software protection Nontrivial Clone Cells state space code pattern Scheme Security Reverse engineering

来源：评论

学校读者我要写书评

暂无评论

LOW BIT-RATE COMPRESSION OF VIDEO AND LIGHT-FIELD DATA USING codeD SNAPSHOTS AND LEARNED DICTIONARIES 17

LOW BIT-RATE COMPRESSION OF VIDEO AND LIGHT-FIELD DATA USING...

引用

IEEE 17th International Workshop on Multimedia Signal Processing (MMSP 2015)

作者： Choudhury, Chandrajit Tarun, Yellamraju Rajwade, Ajit Chaudhuri, Subhasis Indian Inst Technol Dept Elect Engn Bombay Maharashtra India Indian Inst Technol Dept Comp Sci & Engn Bombay Maharashtra India

ISBN: (纸本)9781467374781

The method of coded snapshots has been proposed recently for compressive acquisition of video data to overcome the space-time trade-of inherent in video acquisition. The method involves modulation of the light entering the video camera at different time instants during the exposure period by means of a different and randomly generated code pattern at each of those time instants, followed by integration across time, leading to a single coded snapshot image. Given this image and knowledge of the random codes, it is possible to reconstruct the underlying video frames - by means of sparse coding on a suitably learned dictionary. In this paper, we apply a modified version of this idea, proposed formerly in the compressive sensing literature, to the task of compression of videos and light-field data. At low bit rates, we demonstrate markedly better reconstruction fidelity for the same storage costs, in comparison to JPEG2000 and MPEG-4 (H.264) on light-field and video data respectively. Our technique can cope with overlapping blocks of image data, thereby leading to suppression of block artifacts.

关键词： Bit rate Videotapes Dictionaries as Topic video data Snapshots Video compression code pattern random codes compression ratio Field data Sparse coding JPEG image data Video cameras images

来源：评论

学校读者我要写书评

暂无评论

NLI2code: Reusing Libraries with Natural Language Interface 18th

NLI2Code: Reusing Libraries with Natural Language Interface

引用

18th International Conference on Software and Systems Reuse (ICSR)

作者： Shen, Qi Xie, Bing Zou, Yanzhen Zhu, Zixiao Wu, Shijun Minist Educ Key Lab High Confidence Software Technol Beijing 100871 Peoples R China Peking Univ Sch Elect Engn & Comp Sci Beijing 100871 Peoples R China

ISBN: (纸本)9783030228880;9783030228873

Modern software development typically involves composing functionality by reusing existing libraries. This task is difficult due to the gap of abstraction levels between user tasks and APIs. In this paper we propose a new concept LibNLI (Library Natural Language Interface) to bridge the gap. LibNLI is a domain-specific language encapsulating APIs into library functions, which is more high-level and instructive than library APIs. In LibNLI, user can reuse libraries with the description of the current programming task. We design an abstract framework NLI2code to illustrate how to build and use LibNLI. The framework combines three components: functional feature summarizes functionality of a library, code pattern maps each functional feature to its implementation, synthesizer creates local variables to complete code patterns into well-typed snippets. The main goal of NLI2code is to show feasibility of reusing libraries with natural language interface and lay out the design space to motivate further related research. We have performed a preliminary evaluation by instantiating this framework in a tool NLI4j to reuse Java libraries. The results affirm its capability to summarize accurate functional features and synthesize correct implementation. LibNLI for the evaluated libraries is published.

关键词： Library reuse code pattern Program synthesis

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：