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子图查询是图数据库研究中的一个重要问题,许多方法基于“过滤-验证”策略进行子图查询,算法研究的重点为快速找到有效的特征集.通过对特征模式在数据图集中的嵌入信息进行分析,离线建立基于重叠关系、邻接关系和近邻关系的嵌入关系索引,提出基于嵌入关系的子图查询算法ERSearch.在给定查询图后,利用特征共现关系与特征嵌入关系联合进行过滤操作,并将过滤阶段的嵌入关系比对结果用于验证过程,提高验证效率.在真实及模拟数据上的实验表明,通过与PathIndex等方法的对比,ERSearch算法有效缩减了候选集的规模,能有效提高过滤与验证阶段的执行效率. 相似文献
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RVM(Reference Verification Method)SYNOPSYS基于OpenVera提出的相关验证技术。它的提出使得OpenVera这门验证语言的优越性更好地体现出来。在分析传统功能验证方法缺陷的基础上,介绍了RVM的特点和优势.并重点研究了RVM中所提供的各种新技术和新功能。将RVM用于所搭建的ⅡC总线功能验证平台中,对新的验证平台的覆盖率进行了分析.结果表明使用RVM的验证平台的代码覆盖率和功能覆盖率都明显优于传统的验证平台。 相似文献
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针对民用航空器机载设备适航审定的要求,文中结合海鸥300飞机航电系统与适航审定结合的开发过程,详细论述了通用飞机机载设备适航审定的过程及方法。所介绍的适航审定流程,即审定基础、审定计划和符合性验证等阶段的主要工作内容,尤其是设计符合性验证制造符合性验证方法,具有一定的普适性,可作为我国通用飞机机载设备适航审定的通用方法。 相似文献
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In this letter, we introduce confusion‐based confidence measures for detecting an impostor in speaker recognition, which does not require an alternative hypothesis. Most traditional speaker verification methods are based on a hypothesis test, and their performance depends on the robustness of an alternative hypothesis. Compared with the conventional Gaussian mixture model–universal background model (GMM‐UBM) scheme, our confusion‐based measures show better performance in noise‐corrupted speech. The additional computational requirements for our methods are negligible when used to detect or reject impostors. 相似文献
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《Microelectronics Journal》2014,45(2):167-178
In this work we provide a methodology for the design and verification of a frequency domain equalizer. The performance analysis of the equalizer is conducted using two methods: simulation based verification in Simulink and System Generator and theorem proving techniques in Higher Order Logic. We conduct both floating-point and fixed-point error estimations for the design in Simulink and System Generator, respectively. Then, we use formal error analysis based on the theorem proving to verify an implementation of the frequency domain equalizer based on the Fast LMS algorithm. The formal error analysis and simulation based error estimation of the algorithm intend to show that, when converting from one number domain to another, the algorithm produces the same values with an accepted error margin caused by the round-off error accumulation. This work shows the efficiency of combining simulation and formal verification based methods in verifying complex systems such as the frequency domain equalizer. 相似文献
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属性说明语言在基于断言的硬件验证中的应用 总被引:2,自引:2,他引:0
EDA界的标准化组织Accellera最近确定IBM的sugar语言为标准的属性说明语言,可以用于基于断言验证技术的设计属性说明.文章首先介绍了基于断言验证的基本概念和属性说明语言PSL的用途和属性定义.然后给出了用PSL实现基于断言的硬件验证方法.用一个实例说明了怎样用PSL语言实现基于断言的验证. 相似文献