一种基于组件的aspect-oriented编程框架

面向方面的编程(AOP:aspect-oriented programming)是一种新的编程技术.它引进了aspect,将影响多个模块的行为封装到一个可重用模块中,允许程序员对横切(crosscutting concerns)进行模块化,从而消除了面向对象编程(OOP:object-oriented programming)引起的代码混乱和分散问题.本文讨论了在服务体模型上实现的一种aspect-oriented编程框架.这个编程框架使用aspect组件,定义了对OOP语言的扩展,可方便将模块化的aspect代码扩展到源程序中,解决了OOP模型在这方面的不足.

Aspect-oriented software reverse engineering

To solve the identification and comprehension problem of crosscutting concerns in existing legacy software system, a framework of aspect-oriented software reveme engineering is proposed. An approach on re-modularizing traversal features of legacy system is presented based on various unified modeling language （UML） diagrams. While modeling crosscutting concerns in UML use case diagrams, the non-functional requirements that affect several use case modules can be enveloped into aspect modules with a stereotype mechanism. The recurring message transmission patterns can be re-modularized as aspects in UML sequence diagrams with UML collaborations. Standard UML activity diagram notations are extended and modified by node fusion and addition, which support the graphical composition operation between crosscutting behaviors and primary business roles of concurrent systems. Case study indicates that travernal features of software system can be extracted and re-modularized from various perspectives in aspect-oriented reverse engineering, which improves comprehensibility and maintainability of legacy systems.

Using UML Behavioral Model to Support Aspect Oriented Model

Aspect oriented software development is an emerging paradigm of software development. The notion of this technique is separation of concerns which means to implement each concern in a single object in object oriented programming but still there are concerns which are distributed on different objects and are called crosscutting concerns while another form is Core concerns are the core functionality provided by the system but crosscutting concerns are the concerns like logging, performance etc. Modeling of aspect oriented software is different from the normal modeling of object-oriented or procedural language software, because aspects don’t have the independent identity or existence and they are tightly coupled to their woven context so it is difficult to model them. The one aim of our research paper is to explore the domain of Modeling of the aspect-oriented software. The goal of this research paper is to give a UML Behavioral modeling techniques in the domain of aspect oriented software development. This technique of generating UML Behavioral Model for aspects will give better understating of separations concerns.

Separation of Fault Tolerance and Non-Functional Concerns: Aspect Oriented Patterns and Evaluation

Dependable computer based systems employing fault tolerance and robust software development techniques demand additional error detection and recovery related tasks. This results in tangling of core functionality with these cross cutting non-functional concerns. In this regard current work identifies these dependability related non-functional and cross-cutting concerns and proposes design and implementation solutions in an aspect oriented framework that modularizes and separates them from core functionality. The degree of separation has been quantified using software metrics. A Lego NXT Robot based case study has been completed to evaluate the proposed design framework.

System Dependence Graph Construction for Aspect Oriented C++

This paper proposes an extended system dependence graph called AspectSDG to represent control and data dependences for AspeetC＋＋ programs, and presents an approach for the construction of AspectSDG. This approach decomposes aspect-oriented programs into three parts： component codes, aspect codes, and weaving codes. It constructs program dependence graphs （PDGs） for each part, and then connects the PDGs at call sites to form the complete AspectSDG. The AspectSDG can deal with advice precedence correctly, and represent the additional dependences caused by aspect codes. Based on this model, we introduce how to compute a static slice of an AspectC＋ ＋ program.

Context-aware BPEL workflow system using aspect-oriented programming

Business process execution language(BPEL)is a most recognized standard workflow language.However,it is difficult to be used in the ubiquitous system computing environment because it is difficult to describe the context information in the selection of the flow through the branch.To solve this problem,we propose a new BPEL workflow system with context-awareness by using aspect-oriented programming(AOP).This system is composed of a BPEL system module and a weaving module using AOP for context-aware.The BPEL system module generates a BPEL workflow program.And the weaving module converts a context-aware mark-up language(CAML)document to the aspect-oriented program that is applied to context-aware code without modification of the existing BPEL document.We also define a new document form that is called CAML,which provides a context-aware that is not available in BPEL.The system can generate a context-aware workflow program.It is developed in a way that inserts context information using AOP to provide context-aware services.

An Embedded Software Modeling and Process by Using Aspect-Oriented Approach

In recent years, mobile devices have become widespread and refined, and they have offered increased convenience in human life. For these reasons, a variety of embedded systems have been designed. Therefore, improving methods for developing of embedded software systematically has become an important issue. Platform-based design is one example of an embedded-system design method that can reduce the design cost via improving a design’s abstraction level. However, platform-based design lacks precise definitions for platforms and design processes. This paper provides an approach that combines the aspects and platform-based design methods for developing embedded software. The approach is built on platform-based design methodology and uses the separating of concerns (SoC) concept to define the aspects and to reduce the crosscutting concerns in embedded system modeling. For aspect issues, we use the extended UML notation with aspects to describe both the static structure and the dynamic structure of the embedded system. We used an example of a digital photo frame system to demonstrate our approach.

Towards Semantic Mutation Testing of Aspect-Oriented Programs

Aspect-oriented programs have received much attention from software testing researchers. Various testing techniques and approaches have been proposed to tackle issues and challenges when testing aspect-oriented programs including traditional mutation testing. In traditional mutation testing of aspect-oriented programs, mutants are generated by making small changes to the syntax of the aspect-oriented language. Recently, a new approach known as semantic mutation testing has been proposed. This approach mutates the semantics of the language in which the program is written. The mutants generated misunderstandings of the language which are different classes of faults. Aspect-oriented programming presents itself with different properties that can be further explored with respect to semantic mutation testing. This paper describes various possible scenarios that semantic mutation testing strategy might have particular value in testing aspect-oriented programs.

一种面向方面编程的图示化分析与实现

图示化地展现面向方面编程的组成、技术架构、编程和测试过程,有助于对AOP思想的理解和技术实现的掌握。以多年实际的教学案例实践,结合UML分析建模技术,使用用例图完成功能需求分析,引入AOP切面的建模分析,建立横切关注方面的立体概念;采用组件图完成技术架构图,进而完成了AOP的技术实现和文件结构图,并详细给出了相关切面织入的测试过程图。探索一种图示化的面向方面的分析与实现过程,解决了面向方面编程认知思想和技术实现的难点。在实际教学中,收到一定效果。

“产出导向法”在大学英语课程思政教学中的应用研究

课程思政和“产出导向法”同为具有中国特色的教学理念,具有良好的融合基础。“产出导向法”在大学英语课程思政教学中应用的可行性,可从教学理念的契合性,教学流程的借鉴性和教学内涵的互补性三个方面进行探讨并构建出“三阶三面三目标”的大学英语课程思政教学模式。

应用型人才培养导向下心理学研究方法课程群批判探究教学模式的构建研究

呼应国家政策导向和社会发展需求,普通本科高校面临从原有以学术性人才培养为目标向聚焦应用型人才培养的多元化办学方向转型,应用心理学专业人才培养需突出其行业实践特点,以人才建设夯实社会心理服务体系构建。在专业课程载体中,研究方法类课程是实现应用型心理学人才培养目标的关键支撑。该文基于解决当前民办普通本科高校心理学研究方法类课程教学“痛点”的思考,构建批判性探究式学习(CIBL)模型,以整合教学理念更新、教学方法创新、教学材料重构、教学资源扩展、教学评价优化以及课程思政挖掘等多层面教改路径,分析CIBL模式支撑应用型心理学人才培养目标的机制,并提出该模式教学效果的检验方案。

融合方面语义和网格标记的多语言意见元组抽取

面向方面的细粒度意见抽取(Aspect-oriented Fine-grained Opinion Extraction,AFOE)任务的目的是以意见对的形式抽取文本评论中的方面和意见词或者再抽取情感极性,形成意见三元组。以往的研究通常以管道方式抽取意见元素,容易出现错误传播的问题,而且大多数只关注方面词和意见词的单个子任务抽取,忽略了不同意见元素之间的相互影响和指示信息,导致意见挖掘任务不完整。此外,面向中文的意见元素抽取任务的研究较少。针对以上问题,文中提出了融合方面语义和网格标记的多语言意见元组抽取模型。首先,使用向内LSTM(Inward-LSTM)和向外LSTM(Outward-LSTM)编码方面词及其对应的上下文信息建立方面和候选意见词的关联,再结合全局信息生成特定方面语义特征的上下文表示,有利于提高下游意见元素抽取的性能。其次,使用网格标记方案的推理策略,利用方面和意见词之间的依赖指示信息进行更准确的抽取,以端到端的方式处理AFOE任务。相比基线模型,对于方面意见对抽取任务,改进的模型在中英文数据集上的F1值提高了0.89%~4.11%,对于三元组抽取任务提高了1.36%~3.11%,实验结果表明,改进的模型能有效地对中英文评论的意见元素进行抽取,性能显著优于基线模型。

面向Aspect的操作系统研究

面向Aspect软件设计是一种新的软件设计思想和技术.分析了近年来操作系统贯穿特性与Aspect概念,构件重构、系统演化与设计,系统安全、性能检测与容错这3个方面的研究成果,指出面向Aspect操作系统研究已经获得了积极的成果.但是,目前的研究缺乏一定的深度和广度,尚没有在操作系统的设计阶段运用AOP(Aspect-Orientedoperating)思想的成果出现.在已有操作系统代码中抽象Aspect的过程中,缺乏完整的工程化和规范化的研究.这些问题的解决有赖于面向Aspect研究的进一步深入.最后,对面向Aspect操作系统研究的前景进行展望,认为有关AOSD(Aspect-Orientedsoftwaredevelopment)的研究有可能对未来操作系统的发展产生重大影响.

面向方面级情感分析的交互式关系图注意力网络

方面级情感分析领域主要采用基于注意力机制的神经网络模型,这类模型忽略了方面词与观点词之间的依存关系和方面词与上下文词之间的距离,导致该类模型情感分类结果不够精确。为了解决上述问题,建立一种交互式关系图注意力网络(RI-GAT)模型。首先,通过长短期记忆(LSTM)网络学习句子的语义特征;然后,将学习的语义特征结合句子的位置信息生成新的特征;最后,在新的特征中提取各方面词和观点词之间的依存关系,实现对句法依存信息和位置信息的高效利用。在Laptop、Restaurant和Twitter数据集上的实验结果表明,相较于次优的动态多通道图卷积网络(DM-GCN),RI-GAT模型分类准确率(Acc)提高了0.67、1.65和1.36个百分点,说明了RI-GAT模型可以更好地建立方面词和意见词之间的联系,使得情感分类更加精确。

最大树法的Aspect挖掘方法

提出一种基于最大树的Aspect挖掘方法,该方法使用Aspect的思想,从动态行为挖掘横切关注点获取运行时方法调用的信息,从而构造方法调用关系数据矩阵,在模糊相似关系的理论基础上,引入相似度构造出对象相似矩阵,并利用最大树方法识别系统中的横切关注点,从而为系统的软件重构和复用提供依据。最后通过实验验证了其有效性,进一步通过与目前具有代表性的挖掘方法进行比较,认为本方法具有实现清晰、效率较高的优点。

一种基于方法调用树的Aspect挖掘方法

Aspect挖掘的目标是识别遗产系统中的横切关注点,为遗产系统的面向方面改造提供支持。基于方法调用树提出一种自动化Aspect挖掘方法,给出方法调用轨迹和方法调用关系的定义,同时给出一致性约束和横切约束。该方法具有比使用动态轨迹的Aspect挖掘方法更高的查全率。

AspectualACME语言切点指示器的形式化描述方法

面向方面软件体系结构描述语言AspectualACME虽引入了切点指示器PCD(Pointcut Designator)的语法成分,但仍未给出其语义的形式化描述。针对这一问题,基于AspectualACME语言抽象语法树,设计了一阶逻辑语言LIAPCD(Logic Language forPCD)。在此基础上提出了AspectualACME语言PCD的形式化描述方法。该方法能精确定义软件体系结构层PCD的语义,可为形式化分析软件体系结构层方面编织提供支持。

结合扇入分析和聚类分析的Aspect挖掘方法

结合扇入分析和聚类分析提出一种新的Aspect挖掘方法,以方法的频繁调用作为横切关注点的外在特征,首先对目标系统进行扇入分析,获取扇入值符合条件的方法集合和调用方法集合,把调用方法看作这些方法的特征属性,构造对象数据矩阵进行聚类分析获得候选Aspect种子集。该方法在保证较高召回率的同时,进一步提高了挖掘的准确率和执行效率。

乡村振兴背景下应用型本科院校大学生“三下乡”社会实践育人创新策略——以山西能源学院为例

乡村振兴战略的提出和实施为高校落实实践育人注入了更多的动力和内涵,以输送应用型人才为目标的地方应用型本科院校具有为乡村振兴战略输送青年人才的责任和使命。以山西能源学院为例,结合学校实际,进一步探索乡村振兴背景下的大学生“三下乡”社会实践育人路径。为实现服务学生成长成才、提升高校育人水平、落实立德树人根本目标,地方应用型本科院校要以“三全育人”为“思想灵魂”、以产教融合为发展路径,更要把“三下乡”社会实践育人视为高校融入国家乡村振兴战略,充分实现为党育人、为国育人的重要“法宝”。

一种使用AspectJ技术的Java契约式编程语言模型

契约式开发方法是一种借鉴了形式化方法的优点而又易于实践的开发方法学,然而Eiffel等传统的契约式编程语言难以学习与推广。本文提供了一种模型,该模型利用面向方面的编程技术,在面向对象程序设计语言基础上,增加了契约式约束检查。并以Java面向对象程序设计语言为例,使用AspectJ技术对Java程序中的接口、类、继承、数据类型、构造器、域、方法、异常增加关注点,进行契约约束检查,最终形成一种易于实践且具有契约式功能的开发语言环境。