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基于深度学习的代码生成方法研究进展

软件学报 2024年第2期35卷 604-628页

作者：杨泽洲陈思榕高翠芸李振昊李戈吕荣聪哈尔滨工业大学(深圳)计算机科学与技术学院广东深圳518055 华为技术有限公司广东深圳518129 北京大学信息科学技术学院北京100871 香港中文大学计算机与工程系中国香港99907

关注根据自然语言描述生成相关代码片段的代码生成(code generation)任务.在软件开发过程中,开发人员常常会面临两种情形.一种是通用功能的实现,需要开发人员编写大量重复且技术含量较低的代码;另一种是依赖于特定任务要求,需要开发人... 详细信息

关注根据自然语言描述生成相关代码片段的代码生成(code generation)任务.在软件开发过程中,开发人员常常会面临两种情形.一种是通用功能的实现,需要开发人员编写大量重复且技术含量较低的代码;另一种是依赖于特定任务要求,需要开发人员查询文档或使用其他工具才能完成的代码编写工作.代码生成作为最直接辅助开发人员完成编码的工作受到学术界和工业界的广泛关注.让机器理解用户需求,自行完成程序编写也一直是软件工程领域重点关注的问题之一.近年来,随着深度学习在软件工程领域任务中的不断发展,尤其是预训练模型的引入使得代码生成任务取得了十分优异的性能.系统梳理当前基于深度学习的代码生成相关工作,并将目前基于深度学习的代码生成方法分为3类:基于代码特征的方法、结合检索的方法以及结合后处理的方法.第1类是指使用深度学习算法利用代码特征进行代码生成的方法,第2类和第3类方法依托于第1类方法进行改进.依次对每一类方法的已有研究成果进行系统的梳理、分析与总结.除此之外,汇总并分析已有的代码生成工作中常用的语料库与评估方法,以便于后续研究进行实验设计.最后,对代码生成方法研究进展进行总结,并针对未来值得关注的研究方向进行展望.

关键词：代码生成深度学习代码检索后处理机器翻译

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Service fault tolerance for highly reliable service-oriented systems: an overview

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Science China(Information Sciences) 2015年第5期58卷 7-18页

作者： ZHENG ZiBin LYU Michael Rung tsong WANG HuaiMin Shenzhen Research Institute The Chinese University of Hong Kong National Laboratory for Parallel & Distributed Processing National University of Defense Technology

Service-oriented systems are widely-employed in e-business, e-government, finance, management systems, and so on. Service fault tolerance is one of the most important techniques for building highly reliable service-oriented systems. In this paper, we provide an overview of various service fault tolerance techniques,including sections on fault tolerance strategy design, fault tolerance strategy selection, and Byzantine fault tolerance. In the first section, we introduce the design of static and dynamic fault tolerance strategies, as well as the major problems when designing fault tolerance strategies. After that, based on various fault tolerance strategies, in the second section, we identify significant components from a complex service-oriented system, and investigate algorithms for optimal fault tolerance strategy selection. Finally, in the third section, we discuss a special type of service fault tolerance techniques, i.e., the Byzantine fault tolerance.

关键词： fault tolerance software reliability Web service SOA

Out of sight, out of mind: a distance-aware forgetting strategy for adaptive random testing

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Science China(Information Sciences) 2017年第9期60卷 78-98页

作者： Chengying MAO tsong Yueh CHEN Fei-Ching KUO School of Software and Communication Engineering Jiangxi University of Finance and Economics Department of Computer Science and Software Engineering Swinburne University of Technology

Adaptive random testing(ART) achieves better failure-detection effectiveness than random testing by increasing the diversity of test cases. However, the intention of ensuring even spread of test cases inevitably causes an overhead problem. Although two basic forgetting strategies(i.e. random forgetting and consecutive retention) were proposed to reduce the computation cost of ART, they only considered the temporal distribution of test cases. In the paper, we presented a distance-aware forgetting strategy for the fixed size candidate set version of ART(DF-FSCS), in which the spatial distribution of test cases is taken into consideration. For a given candidate, the test cases out of its "sight" are ignored to reduce the distance computation cost. At the same time, the dynamic adjustment for partitioning and the second-round forgetting are adopted to ensure the linear complexity of DF-FSCS algorithm. Both simulation analysis and empirical study are employed to investigate the efficiency and effectiveness of DF-FSCS. The experimental results show that DF-FSCS significantly outperforms the classical ART algorithm FSCS-ART in efficiency, and has comparable failure-detection effectiveness. Compared with two basic forgetting methods, DF-FSCS is better in both efficiency and effectiveness. In contrast with a typical linear-time ART algorithm RBCVT-Fast, our algorithm requires less computational overhead and exhibits the similar failure-detection capability. In addition, DF-FSCS has more reliable performance than RBCVT-Fast in detecting failures for the programs with high-dimensional input domain.

关键词： adaptive random testing software testing test cases computational overhead diversity

SRC-3/AIB1:transcriptional coactivator in oncogenesis

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Acta Pharmacologica Sinica 2006年第4期27卷 387-394页

作者： Sophia Y TSAI Ming-jer TSAI Department of Molecular and Cellular Biology Department of Molecular and Cellular Biology Prostate SPOREBaylor College of MedicineOne Baylor PlazaHouston.Texas 77030USA

Steroid receptor coactivator-3(SRC-3,also known as NCoA3,AIB1,p/CIP,RAC3,ACTR,and TRAM 1),localized on a frequently amplified region,20q 12,has beenassociated with multiple cancers,including breast,gastric and prostate *** SRC-3 has been implicated as an oncogene,compelling evidence hasonly recently emerged implicating it as a causal factor in the genesis of ***,we summarize recent evidence that indicates aberrant SRC-3 ex-pression is important in hormone-sensitive and -insensitive human cancers.

关键词： SRC-3/AIB1 oncogene mouse model cancer signal transduction

Metamorphic testing as a test case selection strategy

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Science China(Information Sciences) 2016年第5期59卷 24-25页

作者： Dave TOWEY Yunwei DONG Chang-Ai SUN tsong Yueh CHEN School of Computer Science The University of Nottingham Ningbo China School of Computer Science and Engineering Northwestern Polytechnical University School of Computer and Communication Engineering University of Science and Technology Beijing Department of Computer Science and Software Engineering Swinburne University of Technology

Software testing is a well-known and popular approach to ensuring quality *** involves execution of the software under test(SUT),in an attempt to either offer some degree of confidence that the software is relatively bug free,or to actually uncover bugs or problems(called failures).Software testing has been studied for many years,and has generated a large body of approaches,methods,and techniques[1].An assumption underlying many of these approaches,however,is

关键词： Oracle Metamorphic testing as a test case selection strategy MT test case

A revisit of three studies related to random testing

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Science China(Information Sciences) 2015年第5期58卷 49-57页

作者： CHEN tsong Yueh KUO Fei-Ching TOWEY Dave ZHOU Zhi Quan Department of Computer Science and Software Engineering Swinburne University of Technology School of Computer Science The University of Nottingham Ningbo China School of Computer Science and Software Engineering University of Wollongong

Software testing is an approach that ensures the quality of software through execution, with a goal being to reveal failures and other problems as quickly as possible. Test case selection is a fundamental issue in software testing, and has generated a large body of research, especially with regards to the effectiveness of random testing(RT), where test cases are randomly selected from the software’s input domain. In this paper, we revisit three of our previous studies. The first study investigated a sufficient condition for partition testing(PT)to outperform RT, and was motivated by various controversial and conflicting results suggesting that sometimes PT performed better than RT, and sometimes the opposite. The second study aimed at enhancing RT itself, and was motivated by the fact that RT continues to be a fundamental and popular testing technique. This second study enhanced RT fault detection effectiveness by making use of the common observation that failure-causing inputs tend to cluster together, and resulted in a new family of RT techniques: adaptive random testing(ART),which is random testing with an even spread of test cases across the input domain. Following the successful use of failure-causing region contiguity insights to develop ART, we conducted a third study on how to make use of other characteristics of failure-causing inputs to develop more effective test case selection strategies. This third study revealed how best to approach testing strategies when certain characteristics of the failure-causing inputs are known, and produced some interesting and important results. In revisiting these three previous studies, we explore their unexpected commonalities, and identify diversity as a key concept underlying their *** observation further prompted us to examine whether or not such a concept plays a role in other areas of software testing, and our conclusion is that, yes, diversity appears to be one of the most important concepts in the fie

关键词： adaptive random testing diversity metamorphic testing proportional sampling strategy random testing software testing

Control of reactive dividing wall column for selective hydrogenation and separation of C3 stream

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1213-1228页

作者： Xing Qian Shengkun Jia Yiqing Luo Xigang Yuan Kuo-tsong Yu School of Chemical Engineering and Technology Chemical Engineering Research Center Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) State Key Laboratory of Chemical Engineering Tianjin University

In our previous work, the reactive dividing wall column(RDWC) was proposed and proved to be effective for selective hydrogenation and separation of C3 stream. In the present paper, the dynamics and control of the proposed RDWC are investigated. Four control structures including composition and temperature controls are proposed. The feed forward controllers are employed in the four control strategies to shorten the dynamic response time, reduce the maximum deviations and offer an immediate adjustment. The control structures are compared by applying them into the RDWC system with 20% disturbances in both the feed flow rate and the feed compositions, and the results are discussed.

关键词： Process control C3 stream selective hydrogenation Reactive dividing wall column

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Updates on the treatment and outcomes of dual chronic hepatitis C and B virus infection

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World Journal of Gastroenterology 2014年第11期20卷 2955-2961页

作者： Chun-Jen Liu Pei-jer Chen Graduate Institute of Clinical Medicine Department of Internal Medicineand Hepatitis Research CenterNational Taiwan University College of Medicine and National Taiwan University Hospital

Dual hepatitis C virus(HCV)/hepatitis B virus(HBV)infection is found in HBV or HCV endemic areas,and in specific populations exhibiting a high risk of parenteral viral *** observations have revealed that HCV/HBV dually infected patients demonstrate a higher risk of liver disease progression compared with HBV or HCV monoinfected *** viral activity responsible for liver disease progression can be determined by examining the viral loads of HCV and HBV and by conducting liver biopsy *** trials have confirmed that the combination therapy of peginterferon alpha-2a or 2b and ribavirin for dual hepatitis patients with HCV dominance appears to be as effective and safe as it is in patients with HCV ***,approximately 60% of dually infected patients with inactive hepatitis B before treatment develop HBV reactivation after the clearance of the *** clinical significance of this HBV reactivation and the strategy to prevent and treat this event should be ***,approximately 30%of dually infected patients lost hepatitis B surface antigen(HBsAg)within 5 years after the start of peginterferonbased therapy,and 40%of them harbored occult HBV *** underlying mechanisms of their accelerating HBsAg seroclearance and the development of occult HBV await further ***,the optimal treatment strategies for dually infected patients who are seropositive for the hepatitis B e antigen must be ***,the advent of new direct-acting antiviral-based anti-HCV therapy may change the optimal therapies for patients with dual hepatitis in the near future,which warrants further clinical trials.

关键词： Dual infection Hepatitis B virus Hepatitis C virus Interferon Pegylated interferon Ribavirin Sustained virological response Hepatitis B surface antigen clearance

Modifying and Reducing Numerical Dissipation in A Two-Dimensional Central-Upwind Scheme

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Advances in Applied Mathematics and Mechanics 2012年第3期4卷 340-353页

作者： Chi-jer Yu Chii-Tung Liu Department of Applied Mathematics National Chiao Tung University1001 University RoadHsinchu 300Taiwan Department of Computer Science and Information Engineering Chaoyang University of Technology168 Jifong E.Rd.Wufong Township Taichung County 41349Taiwan

This study presents a modification of the central-upwind Kurganov scheme for approximating the solution of the 2D Euler *** prototype,extended from a 1D model,reduces substantially less dissipation than *** problem arises from over-restriction of some slope limiters,which keep slopes between interfaces of cells to be *** study reports the defect and presents a re-derived optimal *** experiments highlight the significance of this formula,especially in long-time,large-scale simulations.

关键词： Hyperbolic systems of conservation laws Godunov-type finite-volume methods central-upwind scheme Kurganov numerical dissipation anti-diffusion