排序方式: 共有23条查询结果,搜索用时 15 毫秒
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针对高斯混合模型在蒙古语语音识别声学建模中不能充分描述蒙古语声学特征之间相关性和独立性假设的问题,开展了使用深度神经网络模型进行蒙古语声学模型建模的研究。以深度神经网络为基础,将分类与语音特征内在结构的学习紧密结合进行蒙古语声学特征的提取,构建了DNN-HMM蒙古语声学模型,结合无监督预训练与监督训练调优过程设计了训练算法,在DNN-HMM蒙古语声学模型训练中加入dropout技术避免过拟合现象。最后,在小规模语料库和Kaldi实验平台下,对GMM-HMM和DNN-HMM蒙古语声学模型进行了对比实验。实验结果表明,DNN-HMM蒙古语声学模型的词识别错误率降低了7.5%,句识别错误率降低了13.63%;同时,训练时加入dropout技术可以有效避免DNN-HMM蒙古语声学模型的过拟合现象。 相似文献
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Javier Tuya María Jos Surez‐Cabal Claudio de la Riva 《Software Testing, Verification and Reliability》2010,20(3):237-288
In the field of database applications a considerable part of the business logic is implemented using a semi‐declarative language: the Structured Query Language (SQL). Because of the different semantics of SQL compared with other procedural languages, the conventional coverage criteria for testing are not directly applicable. This paper presents a criterion specifically tailored for SQL queries (SQLFpc). It is based on Masking Modified Condition Decision Coverage (MCDC) or Full Predicate Coverage and takes into account a wide range of the syntax and semantics of SQL, including selection, joining, grouping, aggregations, subqueries, case expressions and null values. The criterion assesses the coverage of the test data in relation to the query that is executed and it is expressed as a set of rules that are automatically generated and efficiently evaluated against a test database. The use of the criterion is illustrated in a case study, which includes complex queries. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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Augusto Cristian Morán Jesús Bertolino Antonia de la Riva Claudio Tuya Javier 《Software Quality Journal》2020,28(3):1147-1171
Software Quality Journal - Continuous integration practice mandates to continuously introduce incremental changes into code, but doing so may introduce new faults too. These faults could be... 相似文献
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中韩日国际会议城市的构建探析 总被引:1,自引:0,他引:1
会议产业,对城市经济发展、产业结构调整和城市资源的整合等,发挥了积极的拉动作用,成为许多国家经营城市的切入点,也成为世界了解城市的窗口、城市走向世界的桥梁.但中韩日三国在会议产业专业化、国际化,以及构建国际会议城市的水平上还比较低,鉴于未来的发展空间巨大,提出可行的完善提高的建议. 相似文献
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斯仁图雅 《计算机测量与控制》2021,29(11):84-87
传统风洞模拟测控系统容易受到测试位置干扰,导致控制效果不佳,针对该问题,提出了基于嵌入式技术的风洞模拟测控系统设计;在系统硬件部分,根据IEEE1588标准,设计总线,在印刷电路板PCB上,确定布线层的层数,避免线路串扰;使用AT91 RM9200驱动模块控制开关,并在系统中嵌入测量仪器和执行机构;在系统软件流程设计过程中,通过嵌入模拟不同湍流特征脉动风场,结合PID算法,设置阈值并计算风洞模拟数据偏差值,通过调节积分控制风洞模拟测控系统的运行;由实验结果可知,该系统静风状态下,与实际情况最大误差为0.01 cm;吹风状态下,与实际距离横向最大相差0.01 cm,纵向相差0.01 cm,具有精准控制效果. 相似文献
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Min Li Houyu Zhu Qing Yuan Tuya Li Minmin Wang Peng Zhang Yilin Zhao Donglin Qin Wenyue Guo Bin Liu Xuan Yang Yunqi Liu Yuan Pan 《Advanced functional materials》2023,33(4):2210867
The modulation effect manifests an encouraging potential to enhance the performance of single-atom catalysts; however, the in-depth study about this effect for the isolated diatomic sites (DASs) remains a great challenge. Herein, a proximity electronic effect (PEE) of Ni/Co DASs is proposed that is anchored in N-doped carbon (N-C) substrate (NiCo DASs/N-C) for synergistic promoting electrocatalytic oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). Benefiting from the PEE of adjacent Ni anchored by four nitrogen (Ni-N4) moiety, NiCo DASs/N-C catalyst exhibits superior ORR and HER activity. In situ characterization results suggest Co anchored by four nitrogen (Co-N4) as main active site for O2 adsorption-activation process, which promotes the formation of key *OOH and the desorption of *OH intermediate to accelerate the multielectron reaction kinetics. Theoretical calculation reveals the adjacent Ni-N4 site as a modulator can effectively adjust the electronic localization of proximity Co-N4 site, promoting the *OH desorption and *H adsorption on Co-N4 site, thereby boosting ORR and HER process significantly. This study opens a new opportunity for rationally regulating the electronic localization of catalytic active centers by proximity single-atom moiety, as well as provides guidance for designing high-efficiency bifunctional electrocatalysts for promising applications. 相似文献
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对内蒙古亿利化学工业有限公司烧碱分厂一次高纯盐酸循环槽爆炸事故进行分析,并介绍了由此进行的工艺改造情况。 相似文献
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Marcos Palacios José García-Fanjul Javier Tuya 《Information and Software Technology》2011,53(3):171-189