风机自动控制系统的三电一体化设计

主要介绍了热电厂5^#风机计算机控制系统的三电一体化设计思路和设计特点，主要包括仪控设计、计算机控制系统设计、电控设计以及控制功能的实现。     

φ660mm厚板锯电控系统的设计实践

介绍了东轻-山谷机器制造有限公司自主开发的锯切铝合金属板的设备--φ660mm厚板锯的电控系统的硬件组成以及控制原理、操作界面等．供同行设计参考。     

热水供暖系统中锅炉、热水泵、管网的节能设计

文章就区域锅炉房集中供热的管网节能设计中一些问题进行了探讨，指出合理选择锅炉台数和容量，正确选择水泵容量，适当增加保温层厚度，减小允许地最大热损失值是节能设计的几个主要措施。     

底部两层框架——抗震墙砖房抗震设计探讨

根据《建筑抗震设计规范》（GBJ11－89）中有关底层框架－抗震墙砖房的规定,从工程实用的角度出发,探讨了度部两层框架－抗震墙砖房的设计要点,并从过渡层楼板,构造柱的设置、抗震墙的设置、结构形式、抗震墙的构造、钢筋混凝土圈梁、过渡层外纵墙、上部承重砖墙等的构造设计方面提出了抗震构造措施。     

巧妙搭桥,自然衔接——浅析信息技术课堂过渡语设计

课堂教学中的过渡语是十分重要的,包括知识梳理与交流学习这些环节中的过渡语,它实际上也融入了对学生的赞美与评价,将所讲内容的重点、难点及小结融于一体,它也是教师引导学生向更高处攀爬的一架阶梯,一堂课的成功与否很大程度上取决于我们对过渡语的精心设计.     

浅析标志设计中的文化元素——论传统文化与现代标志设计的再反思

中国传统文化的内涵十分丰富,涉及的范围也相当广阔。现代标志设计应吸取传统文化的精髓,形成具有鲜明民族文化特色、历史文化内涵和强烈民族个性的标志设计,这也是标志设计开拓民族设计风格走向世界的一个重要桥梁。本文以＂2008年北京奥运的标志＂为例,对汉字、传统图形、色彩这几种传统文化符号在现代标志设计中的应用略作分析,阐示传统文化与现代标志设计的融合。     

Record keeping in two types of relationships.

Three studies with 109 undergraduates tested the predictions that members of exchange relationships would keep track of individual inputs into joint tasks and members of communal relationships would not. In each study, Ss worked on a task with a partner with whom they (a) desired or had a communal relationship or (b) desired or had an exchange relationship. The task involved locating and circling number sequences in a large matrix. Whether Ss used a pen of the same or of a different color from that used by their partner served as the dependent measure. If partners worked with pens of the same color, individual inputs were obsured. If they worked with different color pens, individual inputs were clear. As predicted, in all 3 studies the proportion of Ss in the exchange conditions who chose a different color pen was significantly greater than 50% and was significantly greater than the proportion of Ss in the communal conditions who chose a different color pen. Also as expected, in no study was this percentage greater than 50% in the communal conditions. When Ss anticipated rather than had an existing communal relationship with the other (Study 1), the proportion of communal Ss choosing a different color pen was significantly lower than 50%. (24 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Listening to one of two synchronous messages.

(This reprinted article originally appeared in the Journal of Experimental Psychology, 1952, Vol 44, 51–55. The following abstract of the original article appeared in PA, Vol 27:4865.) The writer was concerned with the possibility of answering 1 of 2 messages which start at the same point in time, but 1 of which is irrelevant. Groups of Ss were told to respond to messages which came over loud speakers if identified by specified and visual cues. 12 Ss were able to answer less than half of the messages directed to them by an auditory call sign, but their efficiency increased to about 70% when supplied with another unambiguous (visual) cue. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

New method of evaluating sublethal damage to erythrocytes by blood pumps

We recently proposed a new concept, the total destruction time of erythrocytes, to indicate sublethal damage to erythrocytes by blood pumps. In this article, results of additional experiments concerning this new concept are reported. Five paired in vitro hemolysis tests with bovine blood were conducted using a cone-type centrifugal pump (Group A) and an impeller-type pump (Group B). A total pressure head of 100 mm Hg was applied. The factors evaluated were the normalized index of hemolysis and the total destruction time, or the pumping duration, required to raise the level of the plasma-free hemoglobin to 50% of the total hemoglobin. The morphologic change of the erythrocytes also was analyzed. The percentage of crenated cells was calculated from blood smear specimens 1 min after starting the pumps and 2 h before the total destruction time of Group A in each experiment. Although there was no statistical difference in the normalized index of hemolysis between the two groups, the total destruction time of Group A erythrocytes was significantly shorter than that of Group B (18.9 +/- 4.5 h and 33.7 +/- 9.9 h in Group A and Group B, respectively; p < 0.02). The rate of crenated erythrocytes was higher in Group A than in Group B at a point 2 h before the total destruction time of Group A. The total destruction time values seem to define a good method for establishing sublethal traumatic damage to erythrocytes in blood pumps.     

Responses of MT and MST neurons to one and two moving objects in the receptive field

To test the effects of complex visual motion stimuli on the responses of single neurons in the middle temporal visual area (MT) and the medial superior temporal area (MST) of the macaque monkey, we compared the response elicited by one object in motion through the receptive field with the response of two simultaneously presented objects moving in different directions through the receptive field. There was an increased response to a stimulus moving in a direction other than the best direction when it was paired with a stimulus moving in the best direction. This increase was significant for all directions of motion of the non-best stimulus and the magnitude of the difference increased as the difference in the directions of the two stimuli increased. Similarly, there was a decreased response to a stimulus moving in a non-null direction when it was paired with a stimulus moving in the null direction. This decreased response in MT did not reach significance unless the second stimulus added to the null direction moved in the best direction, whereas in MST the decrease was significant when the second stimulus direction differed from the null by 90 degrees or more. Further analysis showed that the two-object responses were better predicted by taking the averaged response of the neuron to the two single-object stimuli than by summation, multiplication, or vector addition of the responses to each of the two single-object stimuli. Neurons in MST showed larger modulations than did neurons in MT with stimuli moving in both the best direction and in the null direction and the average better predicted the two-object response in area MST than in area MT. This indicates that areas MT and MST probably use a similar integrative mechanisms to create their responses to complex moving visual stimuli, but that this mechanism is further refined in MST. These experiments show that neurons in both MT and MST integrate the motion of all directions in their responses to complex moving stimuli. These results with the motion of objects were in sound agreement with those previously reported with the use of random dot patterns for the study of transparent motion in MT and suggest that these neurons use similar computational mechanisms in the processing of object and global motion stimuli.     

Relation of phonological and orthographic processing to early reading: Comparing two approaches to regression-based, reading-level-match designs.

K. E. Stanovich and L. Siegel (see record 81-030191) introduced regression-based logic to the reading-level-match design by statistically matching children with reading disabilities, with and without discrepancies in IQ, to normal-reading children on the basis of grade-adjusted decoding scores. The authors replicated this approach but contrasted it with statistical matches using w scores, which are Rasch-scaled decoding scores based on a common metric regardless of age or grade. No differences were found in cognitive skills between children whose reading performance was discrepant and not discrepant with IQ, regardless of whether age-adjusted decoding scores or w scores were used. Matching on w scores did not result in the phonological and orthographic tradeoffs seen when standardized scores were used. The orthographic-decoding relationship was nonlinear, with little functional relation between the skills at low levels of decoding. These results question the conclusion that orthographic skills are compensatory for reading-disabled children. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of two strategies for analysis of variance in nonorthogonal designs.

Compared the M. I. Appelbaum and E. M. Cramer (see record 1974-28956-001) comparison of models strategy for analysis of data from nonorthogonal designs with the J. E. Overall and D. K. Spiegal (see record 1970-01534-001) Method 1 general linear model analysis. Data were generated by Monte Carlo methods to include known true ANOVA main and interaction effects. In the presence of a true but nonsignificant interaction, estimates of main effect parameters derived from the Method 1 general linear model analysis were significantly closer to the true values. Greater accuracy in estimation of main effects in the presence of a significant interaction was also observed. The danger of letting observed data determine the ANOVA model and the hypotheses to be tested is emphasized. (12 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

进口设备备件国产化工作的几点体会

通过对进口设备备件国产化的工作实践及分析,提出了进口设备备件国产化工作中应遵循的原则和注意的问题。     

Visual discrimination by cats given lesions of visual cortex in one or two stages in infancy or in one stage in adulthood.

Sparing of visual function was studied in cats with bilateral cortical damage to Areas 17 and 18 and most of Area 19. Cats with lesions made in 2 stages, on Postnatal (P) Days 3 and 6, in 1 stage on P6, or in 1 stage in adulthood were compared with sham-operated controls on 10 visual discrimination tasks. On some tasks, both groups of cats that underwent surgery as infants showed considerable sparing of function compared with cats that had surgery as adults; the latter group showed a marked impairment. However, on several of the discriminations, 2-stage lesions permitted almost total sparing of pattern vision, whereas 1-stage lesions made neonatally were almost as debilitating as those incurred in adulthood. The findings suggest that differential behavioral consequences can follow physiological or anatomical changes, or both, that occur within a 4-day neonatal interoperative period. (PsycINFO Database Record (c) 2010 APA, all rights reserved)