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数据平滑技术主要是用来解决统计语言模型在实际应用中数据稀疏问题,它是语言建模的核心技术,Katz平滑方法是应用最广泛的方法之一.本文对Katz平滑算法作了改进,使之应用于trigger对的平滑,并在汉语-蒙古语机器翻译系统实现了该算法,实验结果表明该技术可以提高翻译效果. 相似文献
43.
基于PowerPoint触发器的交互式课件制作 总被引:1,自引:0,他引:1
使用PowerPoint中的触发器功能可以大大增加了PowerPoint课件的交互性,文章通过三个具体实例,对如何利用PowerPoint触发器制作交互性课件的方法做了介绍。 相似文献
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触发器是一种特殊的存储过程,系统会在执行某些特定的T-SQL语句时自动执行在触发器内部定义的SQL语句,从而保证了数据的安全性和完整性.在图书管理系统后台数据库中定义合适的触发器,可以提高图书数据库的安全性,减轻前台管理系统的运行负担. 相似文献
46.
Multi-frequency vibrations of a system of two isotropic circular plates interconnected by a visco-elastic layer that has non-linear characteristics are considered. The considered physical system should be of interest to many researches from mechanical and civil engineering. The first asymptotic approximation of the solutions describing stationary and no stationary behavior, in the regions around the two coupled resonances, is the principal result of the authors. A series of the amplitude-frequency and phase-frequency curves of the two frequency like vibration regimes are presented. That curves present the evolution of the first asymptotic approximation of solutions for different non-linear harmonics obtained by changing external excitation frequencies through discrete as well as continuous values. System of the partial differential equations of the transversal oscillations of the sandwich double circular plate system with visco-non-linear elastic layer, excited by external, distributed, along plate surfaces, excitation are derived and approximately solved for various initial conditions and external excitation properties. System of differential equations of the first order with respect to the amplitudes and the corresponding number of the phases in the first asymptotic averaged approximation are derived for different corresponding multi-frequency non-linear vibration regimes. These equations are analytically and numerically considered in the light of the stationary and no stationary resonant regimes, as well as the multi-non-linear free and forced mode mutual interactions, number of the resonant jumps. 相似文献
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555定时器的功能模型及其应用 总被引:2,自引:0,他引:2
卢成健 《玉林师范学院学报》2006,27(5):28-31
提出一种用简化模型的形式表示555定时器逻辑功能的方法,运用该方法分析基于555定时器的电路具有形象、直观和便于理解掌握的特点.文中给出了使用该方法分析由555定时器组成的单稳态触发器、多谐振荡器和施密特触发器等实例. 相似文献
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Taichi Kimura Prof. Makoto Ouchi 《Angewandte Chemie (International ed. in English)》2023,62(33):e202305252
In this work, we achieved a triggering degradation of polymers composed of carbon-carbon (C−C) bonded backbone without relying on introduction of labile heteroatom-based bond. The crucial point for the achievement is using vinyl ether (VE) as a comonomer in radical copolymerization of (meth)acrylate for introduction of the carbon-hydrogen (C−H) bonds active for photocatalyzed hydrogen atom transfer (HAT) as triggers in the pendant. Interestingly, methyl methacrylate (MMA)-n-butyl vinyl ether (NBVE) copolymer underwent degradation in acetonitrile in the presence of benzophenone (Ph2CO) under UV irradiation at 80 °C. The degradation did not take place, when any one of UV, Ph2CO, heat, and NBVE unit was removed or HAT-active solvent such as toluene and 1,4-dioxane was used. These control experiments strongly supported the HAT-triggering degradation. Furthermore, the degradation behaviors of the copolymers with other vinyl ethers such as tert-butyl vinyl ether and methyl isopropenyl ether indicated that the C−H bond neighboring to oxygen on the pendant is mainly responsible for the trigger leading to degradation. The HAT-triggering degradation was also demonstrated even with the acrylate-based copolymer. 相似文献
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本文详细讨论了雪崩晶体管各种不同的导通方式,并发现由于雪崩晶体管C—E极间电压变化速率太大时,造成雪崩晶体管导通,论述了产生这种现象的原因,及此现象的存在对超快速电路的影响。 相似文献