The Strategic Control of Multiple Routes in Imitation of Actions.

The aim of this study was to bring to the surface the strategic use of imitative processes in the context of a 2-route model: (a) direct imitation, used in reproducing new, meaningless actions, and (b) imitation based on stored semantic knowledge of familiar meaningful actions. Three experiments were carried out with healthy participants who reproduced meaningful and meaningless actions within an established time limit. The study investigated 3 factors that could potentially affect the selection of processes used for imitation: (a) the composition of the experimental list (blocked or mixed presentation), (b) the presence-absence of instructions (Experiments 1 and 2), and (c) the relative proportions of the stimuli (Experiment 3). Overall, the results suggest that each of these factors influences the selection of imitative strategies in healthy individuals with temporarily reduced capacities, as happens in the case of brain-damaged patients. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

改质沥青生产常见事故处理

分析改质沥青生产中常见的过油不畅、中间槽液下泵损坏、改质釜搅拌器及电机损坏原因 ,提出改进措施 ,取得了良好的效果     

布格曼(Burgmann)干气密封应用与故障诊断

介绍了干气密封的原理、特点,并阐述了合成气压缩机干气密封系统的故障诊断。     

基于雷达散射特征的堤防隐患诊断技术研究

结合堤防隐患的雷达散射特性,研究了不同堤防隐患在雷达波散射效应下的特征表现,分析 了空洞、渗透、松散体、滑坡、裂缝、漏水等堤防隐患的雷达图谱。研究表明:堤防隐患的成像效果 依赖于雷达设备的技术指标、测量参数和操作方法等因素,隐患图像解释的准确性依赖于图像处理技 术。针对不同堤防隐患和设备物理参数,研究雷达波的散射特征,有助于更高精度地解析图像信息, 是解决雷达波干扰多、衰减快、特征弱等问题的有效途径。结合雷达波的形态、波长、振幅、相位等 特征信息,在对散射信号进行解释时采用二维时频分析的瞬态谱,并运用小波分析、Hilbert变换、Z 变换等方法对图像进行去噪、增强、滤波处理,可对堤身探测范围内的隐患性状、分布、形态信息进 行有效诊断。     

Nonequidistant modified predictor-corrector methods for solving systems of differential equations

This paper shows that it is possible to develop nonequidistant predictor-corrector formulae with minimum error bounds for solving systems of differential equations such that the tedious difficulties which arise in practical applications can be overcome. General predictor-corrector formulae with variable steps are constructed. Explicit third order- and fourth order-two points formulae are derived. Also fourth order-three points formulae are represented. Two theorems are given. A flow chart for general nonequidistant predictor-corrector methods using automatic control for the step length is compactly represented for solving systems of differential equations. These methods are recommended to be used widely in practice because of many advantages.     

碱性蓄电池的常见故障现象及预防方法

对碱性蓄电池的多种故障现象进行了描述,并对故障现象提出预防对策.     

热水采暖系统的故障分析与处理

以设计和安装角度分析了造成室内热水采暖系统故障的原因，指出其影响因素是多方面的，在排除故障时应对其逐一分析，并提出一些可行性建议。     

Size constancy in infants: 4-month-olds' responses to physical versus retinal image size.

This study tested whether 4-month-old infants respond primarily to objects' physical or retinal image sizes. In the study's main experiment, infants were habituated to either a 6-cm-diameter disk at a distance of 18 cm or a 10-cm disk at 50 cm. They were then given 2 test trials in which the 6- and 10-cm disks were presented side by side at a distance of 30 cm. For each infant, one test object had a novel physical size but a familiar retinal image size, and the other had a familiar physical size but a novel retinal image size. The infants exhibited a significant looking preference for the object that had a novel physical size. A preliminary experiment found that 4-month-olds' looking preferences are based on novelty, not familiarity, under the conditions of this study. Given this finding, the results suggest that 4-month-old infants attend and respond primarily to physical size, not to retinal image size. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Do infants segment words or recurring contiguous patterns?

Eight experiments tested the hypothesis that infants' word segmentation abilities are reducible to familiar sound-pattern parsing regardless of actual word boundaries. This hypothesis was disconfirmed. in experiments using the headturn preference procedure: 8.5-month-olds did not mis-segment a consonantvowel- consonant (CVQ word (e.g., dice) from passages containing the corresponding phonemic pattern across a word boundary (C#VC#; "cold ice"), but they segmented it when the word was really present ("roll dice"). However, they did not segment the real vowel-consonant (VC) word (ice in "cold ice") until 16 months. Yet, at that age, they still did not false alarm on the straddling CVC word. Thus, infants do not simply respond to recurring phonemic patterns. Instead, they are sensitive to both acoustic and allophonic cues to word boundaries. Moreover, there is a sizable developmental gap between consonant and vowel-initial word segmentation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)