励磁系统中全控整流电路异常波形分析

现代同步发电机励磁调节器中大多数采用三相全控整流电路，可控硅整流电路输出电压波形直接影响着发电机的励磁效果。对三相全控整流电路正常、桥臂断开、脉冲丢失等情况下的波形进行分析后，给出了监视和保护措施。     

ICAST用于小区污水回用处理及自控与监测系统设计

设计了间歇／循环活性污泥技术(ICAST)用于小区生活污水就地回用处理及自动控制运行与监测水质的系统．以出水达到中水回用标准为目标，依据进水水质水量和ICAST生化反应池内溶解氧(DO)值，通过电磁流量计、水位继电器、电磁阀、PLC控制器等与计算机联接，自动设定各工艺阶段的运行参数，经济、安全、可靠地实现了污水回用处理运行和水质监测的自动化．     

锅炉水中氯离子的自动测定系统研究

介绍了电厂锅炉水中氯离子的测定原理与检测系统，从而完成氯离子的自动测定．本系统可以连续在线监测锅炉供水的氯离子浓度等，为锅炉的安全生产与自动控制提供了条件，采用改进后的PH计作为在线氯离子计，以代替原来的人工检测，整个系统检测数据可靠，有效地提高氯离子检测的准确性．     

井下泵房自动监控改造

通过使用双单片机和嵌入式以太网芯片RTL8019AS,完成井下水泵房的自动监控的同时实现了远程控制和数据共享,为老矿井改造提供了一定的参考价值。     

核心词自动分阶的一种计算模型——以纳西族玛丽玛萨话为例

核心词分阶是判定同源关系的必要步骤.基于大规模语音对应数据库,我们提出并讨论一种算法模型,该模型计算核心词的核心程度,自动调整高阶核心词集和低阶核心词集,使得两阶词集在已知为同源关系的语言中,其分布与已知为接触关系的语言显著不同,即通过算法调整核心词集,使得有阶分布的显著性增加.这个算法模型的基本思路分为两个密切相关的部分:核心程度算法和两阶核心词调整算法.     

期刊互联网审稿刍议

审稿作为出刊过程中很重要的一个环节,实行互联网审稿将是必然的发展趋势.因为互联网审稿相比于传统审稿更具优势.但目前要实现互联网审稿,尚存在一些问题.因此,要想尽一切办法,克服一切困难,争取早日实现自动化办刊的目标.     

基于微机的联网自动报警系统及其软件开发技术

分析了以685数字报警接收主机为中心组成的联网自动报警系统。介绍了自行设计的系统软件的主要特点,以及用Visual Basic和ACCESS开发的基于微机的联网自动报警软件系统的关键技术。     

Evaluating Stimulus-Stimulus Pairing and Direct Reinforcement in the Establishment of an Echoic Repertoire of Children Diagnosed with Autism

Many children with autism do not imitate adult vocalizations, an important skill in learning to talk. Pairing adult vocalizations with preferred stimuli has been shown to increase free-operant vocalizations but effects are temporary; thus, direct reinforcement may be necessary to establish durable vocal behaviors. In Experiment 1, directly reinforced echoic responses did not increase following stimulus-stimulus pairings in three children with autism. Similarly, pairings did not increase free-operant vocalizations in Experiment 2, a replication of Miguel et al. (2002). Experiment 3 demonstrated that shaping increased vowel frequency for one participant. Results suggest that variables are yet to be delineated that influence effectiveness of a stimulus-stimulus pairing procedure on vocalization frequency and acquisition of a verbal operant following such pairings.     

Modelling childhood malnutrition in Zambia: an adaptive Bayesian splines approach

Nutritional status of a child is an important determinant factor of his/her health and survival. Evaluation of child nutritional status is usually based on three anthropometric indices of height-for-age (stunting), weight-for-height (wasting) and weight-for-age (underweight). This paper is a case study that focuses on a new approach of estimating nonlinear effects. It models the dependence of probability of underweight children in Zambia on some covariates, some of which are metrical whose effects are assumed to be nonlinear and estimated nonparametrically through a Bayesian B-spline basis function approach with adaptive knot selection using the data set from the 1992 Zambia Demographic and Health Survey (ZDHS). For all the unknown functions, the number and location of knots as well as the unknown coefficients of the basis functions are estimated simultaneously using reversible jump Markov chain Monte Carlo (RJMCMC) techniques.     

用朗金土压力理论探讨沉井在砂砾石地层中的有效纠偏

本文就沉井在砂砾石地层中,试用朗金土压力理论,提出在井墙外垒积土堆或捣挖沟槽的方法,促使井墙两侧土压力在瞬间发生交替变化,并产生有效反向差值,迫使沉井强行纠偏,平稳下沉,从而,拓宽沉井施工新技术。