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The potential of different artificial neural network (ANN) techniques in daily global solar radiation modeling based on meteorological data 总被引:3,自引:0,他引:3
The main objective of present study is to predict daily global solar radiation (GSR) on a horizontal surface, based on meteorological variables, using different artificial neural network (ANN) techniques. Daily mean air temperature, relative humidity, sunshine hours, evaporation, and wind speed values between 2002 and 2006 for Dezful city in Iran (32°16′N, 48°25′E), are used in this study. In order to consider the effect of each meteorological variable on daily GSR prediction, six following combinations of input variables are considered:
- (I)
- Day of the year, daily mean air temperature and relative humidity as inputs and daily GSR as output.
- (II)
- Day of the year, daily mean air temperature and sunshine hours as inputs and daily GSR as output.
- (III)
- Day of the year, daily mean air temperature, relative humidity and sunshine hours as inputs and daily GSR as output.
- (IV)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours and evaporation as inputs and daily GSR as output.
- (V)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours and wind speed as inputs and daily GSR as output.
- (VI)
- Day of the year, daily mean air temperature, relative humidity, sunshine hours, evaporation and wind speed as inputs and daily GSR as output.
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1 of 5 cards was selected by each S and 2 minutes association to this card was required. GSR response to the selected card was compared to the responses for nonselected cards in 2 groups of Ss. 1 group was motivated to "deceive the operator and withhold responses." The other group was given no special instruction. The hypothesis that Ss who are motivated to deceive will more frequently produce disproportional large skin resistance responses to critical items as opposed to noncritical items than will Ss who have not been so motivated was upheld. Ss who were motivated to deceive were more successfully detected. In addition detection took place at a much greater than chance level in the motivated group, while in the other group it occurred only at chance levels. The degree of autonomic response to significant stimuli appears to be a function of the motivational state of the S. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Significant negative correlations were obtained between scores on Byrne's Repression-Sensitization (R-S) scale and several indices of electrodermal activity in a paradigm in which Ss anticipated the presentation of strong electric shock. These results support the hypothesis that Ss who receive low scores on the R-S scale (repressers) exhibit greater disturbance than do those who receive high scores (sensitizers). Repressers reported a stronger tendency to avoid thinking about impending shock (suppression) than did sensitizers. This reported tendency to use suppression techniques was directly and significantly related to basal skin conductance, non-specific GSR activity, magnitude of anticipatory GSR activity, and the number of sec. by which this activity preceded shock. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
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Despina Papadopoulos 《Architectural Design》2007,77(4):62-67
The omnipresence of the iPod and mobile phone has ensured portable and wearable technologies' highly privileged position in contemporary society. They are at the top of the pile where conspicuous consumption is concerned - you only have to visit an Apple store on a Saturday afternoon to witness the degree to which this highly sought-after gadgetry has become subject to consumer frenzy and speculation. Here, Despina Papadopoulos reviews the particular social and cultural impact of wearable devices. She also welcomes in a new generation of interactive designers who are investigating the human and emotional potential of emergent technologies. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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许娅 《计算机与数字工程》2007,35(3):94-96
根据人们常用的洗牌算法对LFSR进行非线性变换,利用该变换可以改变元素原有的排列顺序,扰乱序列原有的某种规律性和结构性,提高序列的非线性,从而构造出一种新流密码系统。实验结果表明,由该系统产生的密钥序列具有均匀性,相关性小的特点。该密码系统能构被应用于网络安全等领域。 相似文献
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皮肤电信号在产品外观偏好评价中的应用研究 总被引:1,自引:0,他引:1
目的研究皮肤电信号(GSR)与用户对产品外观的情感体验存在的对应关系,验证皮电信号用于检测产品外观的偏好体验的可能性。方法以座椅的不同外观方案为诱发材料,采集被试观看不同外观座椅的皮肤电信号,对信号进行预处理及特征提取,作出相应的数理统计,并与被试的主观问卷进行比较分析。结果观看者观看过程中皮电整体呈现缓慢下降,但对偏好产品会出现皮电实时升高的情况;观看不同座椅时观看者的皮电信号呈现显著性差异;在70%(73.3%)以上的情况下,皮电显著升高的座椅方案与被试主观问卷填写的偏好方案有对应关系。结论在无巨大新异方案的情况下,皮电信号能较好地实时反映观看者的偏好情绪,其主要为一种唤醒程度,对产品外观方案评价具有较好的应用价值。 相似文献
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New sunshine-based models for predicting global solar radiation using PSO (particle swarm optimization) technique 总被引:1,自引:0,他引:1
PSO (particle swarm optimization) technique is applied to estimate monthly average daily GSR (global solar radiation) on horizontal surface for different regions of Iran. To achieve this, five new models were developed as well as six models were chosen from the literature. First, for each city, the empirical coefficients for all models were separately determined using PSO technique. The results indicate that new models which are presented in this study have better performance than existing models in the literature for 10 cities from 17 considered cities in this study. It is also shown that the empirical coefficients found for a given latitude can be generalized to estimate solar radiation in cities at similar latitude. Some case studies are presented to demonstrate this generalization with the result showing good agreement with the measurements. More importantly, these case studies further validate the models developed, and demonstrate the general applicability of the models developed. Finally, the obtained results of PSO technique were compared with the obtained results of SRTs (statistical regression techniques) on Angstrom model for all 17 cities. The results showed that obtained empirical coefficients for Angstrom model based on PSO have more accuracy than SRTs for all 17 cities. 相似文献