Speech recognition based on a combination of acousticfeatures with articulatory information

The contributions of the static and dynamic articulatory information to speech recognition were evaluated, and the recognition approaches by combining the articulatory information with acoustic features were discussed. Articulatory movements were observed by the Electromagnetic Articulographic System for reading speech, and the speech signals were recorded simultaneously. First, we conducted several speech recognition experiments by using articulatory features alone, consisting of a number of specific articulatory channels, to evaluate the contribution of each observation point on articulators. Then, the displacement information of articulatory data were combined with acoustic features directly and adopted in speech recognition. The results show that articulatory information provides with additional information for speech recognition which is not encoded in acoustic features. Furthermore, the contribution of the dynamic information of the articulatory data was evaluated by combining them in speech recognition. It is found that the second derivative of articulatory information provided quite larger contribution to speech recognition comparing with the second derivative of acoustical information. At last, the combination methods of articulatory features and acoustic ones were investigated for speech recognition. The basic approach is that the Bayesian Network (BN) is added to each state of HMM, where the articulatory information is represented by the BN as a factor of observed signals during training the model and is marginalized as a hidden variable in recognition stage. Results based on this HMM/BN framework show a better performance than the traditional method.     

三参数Weibull分布定数截尾下形状参数的区间估计

本给出了在定数截尾场合下利用三个次序统计量来构造三参数Weibull分布形状参数精确置信区间的方法，另外本还给出了三参数Weibull分布三个参数的联合置信域。章的最后，给出了Monte-Carlo模拟例子并运用本的方法求解了两个实例。     

给水加热型联合循环的变工况性能

在联合循环改造的各种方案中,给水加热型具有投资少、改动少、耗用优质燃料较少、尤其是简单易行及技术难度小等特点,因此在我国现有的技术经济水平、特别是以煤为主的国情下,有一定应用市场。本文分析比较了多种变工况运行方式的性能及可能出现的问题,并在此基础上提出综合性能较好的运行模式。     

基于光学小波微分预处理的联合变换相关目标识别

提出了一种基于光学小波变换微分预处理的光电混合联合变换相关系统,该系统利用同一光路可实时实现对输入图象的小波变换微分预处理和联合变换相关识别.实验结果表明:该系统能得到很尖锐的互相关峰,可显著提高联合变换相关器的识别能力.     

激励销售与准确预测的薪酬机制设计

由于销售人员具有比厂商更多的销售信息，厂商在制定生产计划时需要参考来自销售人员的市场预测。传统的薪酬机制在引导销售人员如实上报预测量方面存在严重不足。Gonik机制虽然可以部分地弥补这一不足，但仍然要由厂商先提供参考定额和相应奖金数值。本发展了一种不需要厂商提供参考定额值而直接由销售人员自己参与提出定额确定奖金并努力销售的薪酬机制。章论证了它的有效性，并导出了在设计合同参数时，需要注意的一些规则和约束，对实际操作有一定的指导意义。     

销售问题的分解算法

销售问题:一家商店经销某种商品,有一个容量为w件的仓库,每月初订货一次,订货提前时间为0,第i月的订货单价为a_i,售货单价为b_i,a_i>0,b_i>0,i=1,…,n;第1月订货前已有存货c件;0≤c≤w,w>0;第n月末不须存货,试制订出一个从第1月到第n月的购销方案,使总收益最大。为讨论方便,如果某个月售货就假定把当月的总售货量在月底一次售完。     

关于算子组Taylor谱的定义

给出了关于算子组Taylor谱的另一种定义及ε-联合伪谱的定义,并讨论了它的一些性质以及关于交叉交换算子组在这几种定义下的一些结果.     

与两个更新过程有关的某些联合分布

本文讨论的两个时偶问题涉及来一个泊松过程与一个更新过程穿越时间和更新数的联合分布．利用向量马氏过程方法得到了这些联合分布的变换，给出了一个与分布均值有关量的数值结果．     

利用皮秒脉冲激光驱动瞬态X射线激光

报道了利用皮秒激光驱动产生瞬态类镍银X射线激光的实验结果.采用一路脉冲宽度为数百皮秒的激光作为预脉冲，配合另一路皮秒激光作为主脉冲联合驱动平面靶，获得了一定强度的类镍银X射线激光输出，输出能量约为5—10nJ. 关键词： 瞬态X射线激光 长短脉冲联合驱动 皮秒脉冲激光     

Generalized Derivations with Skew Nilpotent Values on Lie Ideals

This article gives characterizations of generalized derivations with skew nilpotent values on noncommutative Lie ideals of a prime ring. The results simultaneously generalize the ones of Herstein, Lee and Carini et al.