A knowledge representation has been proposed using the state space theory of Artificial Intelligence for Dynamic Programming Model, in which a model can be defined as a six tuple M=(I,G,O,T,D,S). A building block mode...A knowledge representation has been proposed using the state space theory of Artificial Intelligence for Dynamic Programming Model, in which a model can be defined as a six tuple M=(I,G,O,T,D,S). A building block modeling method uses the modules of a six tuple to form a rule based solution model. Moreover, a rule based system has been designed and set up to solve the Dynamic Programming Model. This knowledge based representation can be easily used to express symbolical knowledge and dynamic characteristics for Dynamic Programming Model, and the inference based on the knowledge in the process of solving Dynamic Programming Model can also be conveniently realized in computer.展开更多
随着软件在各个领域的广泛应用,软件漏洞呈不断增长的趋势,基于深度学习的软件漏洞检测方法得到广泛应用;然而,现有的图表示学习方法通常忽略了图中边对软件漏洞检测的影响,并且对边权重的表示过于粗糙。针对该问题,提出一种基于边权重...随着软件在各个领域的广泛应用,软件漏洞呈不断增长的趋势,基于深度学习的软件漏洞检测方法得到广泛应用;然而,现有的图表示学习方法通常忽略了图中边对软件漏洞检测的影响,并且对边权重的表示过于粗糙。针对该问题,提出一种基于边权重的软件漏洞检测方法EWVD(Edge Weight for Vulnerability Detection)。首先,对源代码中的注释、自定义变量名和函数名进行清理和抽象表示;其次,经过对比分析后选择使用Sent2Vec进行嵌入表示;再次,利用连接结构、邻居节点的重要性和Jaccard相似性这3种度量方式,综合计算边权重,从而识别节点间的信息传递能力;最后,利用边权重提升模型对漏洞语句潜在关系的感知能力,从而判断图中边的重要性。实验结果表明,与7种漏洞检测基线方法中的最优基线VulCNN相比,EWVD的准确率提高了1.06个百分点,而假阳性率(FPR)降低了1.11个百分点。可见,EWVD细化了边权重的表示,并且提升了漏洞检测的综合性能。展开更多
Designing technologies is a process that relies on multiple interactions between design and use contexts. These interactions are essential to the development and establishment of technologies. This article seeks to un...Designing technologies is a process that relies on multiple interactions between design and use contexts. These interactions are essential to the development and establishment of technologies. This article seeks to understand the attempts of healthcare organisations to integrate use contexts into the design of healthcare technologies following insights of the theoretical approaches of social learning and user representations. We present a multiple case study of three healthcare technologies involved in improving elderly care practice. These cases were part of a Dutch quality improvement collaborative program, which urged that development of these technologies was not “just” development, but should occur in close collaboration with other parts of the collaborative program, which were more focused on implementation. These cases illustrate different ways to develop technologies in interaction with use contexts and users. Despite the infrastructure of the collaborative program, interactions were not without problems. We conclude by arguing that interactions between design and use are not naturally occurring phenomena, but must be actively organised in order to create effects.展开更多
In this paper,an improved graphic representation for Structured Program Design——N-S-Z (Nassi-Shneiderman-Zhou Diagram)is proposed.It not only preserves the advantages of the conventional graphic and non-graphic repr...In this paper,an improved graphic representation for Structured Program Design——N-S-Z (Nassi-Shneiderman-Zhou Diagram)is proposed.It not only preserves the advantages of the conventional graphic and non-graphic representations,but also adds some new features which will enhance the representa- tive power of the original diagram.展开更多
文摘A knowledge representation has been proposed using the state space theory of Artificial Intelligence for Dynamic Programming Model, in which a model can be defined as a six tuple M=(I,G,O,T,D,S). A building block modeling method uses the modules of a six tuple to form a rule based solution model. Moreover, a rule based system has been designed and set up to solve the Dynamic Programming Model. This knowledge based representation can be easily used to express symbolical knowledge and dynamic characteristics for Dynamic Programming Model, and the inference based on the knowledge in the process of solving Dynamic Programming Model can also be conveniently realized in computer.
文摘随着软件在各个领域的广泛应用,软件漏洞呈不断增长的趋势,基于深度学习的软件漏洞检测方法得到广泛应用;然而,现有的图表示学习方法通常忽略了图中边对软件漏洞检测的影响,并且对边权重的表示过于粗糙。针对该问题,提出一种基于边权重的软件漏洞检测方法EWVD(Edge Weight for Vulnerability Detection)。首先,对源代码中的注释、自定义变量名和函数名进行清理和抽象表示;其次,经过对比分析后选择使用Sent2Vec进行嵌入表示;再次,利用连接结构、邻居节点的重要性和Jaccard相似性这3种度量方式,综合计算边权重,从而识别节点间的信息传递能力;最后,利用边权重提升模型对漏洞语句潜在关系的感知能力,从而判断图中边的重要性。实验结果表明,与7种漏洞检测基线方法中的最优基线VulCNN相比,EWVD的准确率提高了1.06个百分点,而假阳性率(FPR)降低了1.11个百分点。可见,EWVD细化了边权重的表示,并且提升了漏洞检测的综合性能。
文摘Designing technologies is a process that relies on multiple interactions between design and use contexts. These interactions are essential to the development and establishment of technologies. This article seeks to understand the attempts of healthcare organisations to integrate use contexts into the design of healthcare technologies following insights of the theoretical approaches of social learning and user representations. We present a multiple case study of three healthcare technologies involved in improving elderly care practice. These cases were part of a Dutch quality improvement collaborative program, which urged that development of these technologies was not “just” development, but should occur in close collaboration with other parts of the collaborative program, which were more focused on implementation. These cases illustrate different ways to develop technologies in interaction with use contexts and users. Despite the infrastructure of the collaborative program, interactions were not without problems. We conclude by arguing that interactions between design and use are not naturally occurring phenomena, but must be actively organised in order to create effects.
文摘In this paper,an improved graphic representation for Structured Program Design——N-S-Z (Nassi-Shneiderman-Zhou Diagram)is proposed.It not only preserves the advantages of the conventional graphic and non-graphic representations,but also adds some new features which will enhance the representa- tive power of the original diagram.
