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101.
Changes in stature during physical activity reflect alterations in spinal column length that occur as a result of loading the spine. The shrinkage is associated with loss of intervertebral disc height. This study aimed to measure both the load on the spine during simulations of a round of golf and the physiological responses to carrying golf clubs. Fine measurement of stature was achieved using a computer‐linked stadiometer inclined to 13°. Shrinkage was measured (n = 6) after performance regimens which mimicked (1) the ambulatory activity during golf play, (2) ambulation and skills employed in par performance and (3) ambulation and carriage of clubs. Our observations indicate significant shrinkage associated with golf skills, mean shrinkage after nine holes being 2.53 mm compared to 1.78 mm in the walking condition. The highest shrinkage was observed when the player carried his clubs, the amount of stature loss being 4.76 mm over nine holes. The highest rates of shrinkage occurred over the first three holes. In a second experiment to further examine the effects of carrying the golf clubs, five of the subjects walked on a motor‐driven treadmill at 5 km h‐1 for 5 min. Carrying the clubs caused a 15% increase in VO2 and a 25% rise in VE compared to normal walking. Increases were found also in perceived exertion. The physical and physiological loadings associated with recreational golf were deemed to be light to moderate and do not denote undue strain in occasional practices. 相似文献
102.
Peter H. Wolff 《Reading and writing》2002,15(1-2):179-206
Current research on the etiology ofdevelopmental dyslexia is generally informed byeither of two major hypotheses. One of theseassumes that the phonological processing ofconsonants and vowels at a segmental levelidentifies the core deficit in developmentaldyslexia and that it cannot be reduced todomain-general deficits of temporal informationprocessing. The other hypothesis holds thatphonological processing deficits aresymptomatic of an underlying, domain-generaldysfunction; and that at least some dyslexiasubtypes are causally related to domain generaldeficits of temporal information processing forauditory and visual stimuli. This report startsfrom the assumption that the terms temporal information processing andphonological processing as applied in currentdyslexia research, are frequently conflated. Further, it assumes that the conflated termsmust be decomposed into their concretebehavioral referents before the causalsignificance of either can be investigatedsystematically.The studies to be summarized in thisreport represents one step toward suchdecomposition. The findings indicated thatduring a motor sequencing task, dyslexicstudents anticipated the signal of anisochronic pacing metronome by intervals thatwere two or three times as long as those ofage matched normal readers or normal adults.These group differences were significant whenparticipants tapped with the preferred indexfinger alone or with both fingers in unison.Dyslexic students also took significantlylonger than normal readers did to recalibratetheir tapping responses when the metronome ratewas experimentally changed in the middle of atrial.In addition, dyslexic students, bycontrast to normal readers, had inordinatedifficulty reproducing simple motor rhythms byfinger tapping, and similar difficultyreproducing the appropriate speech rhythm oflinguistically neutral nonsense syllables.These difficulties were exaggerated whenparticipants had to synchronize theirperformance to an external pacing metronome.The implications of the findings for temporalinformation processing deficits on one hand,and impaired phonological processing on theother, are discussed. 相似文献
103.
《Information processing & management》2023,60(4):103358
Stock forecasting has always been challenging as the stock market is affected by a combination of factors. Temporal Convolutional Network (TCN) based on convolutional structure has been widely used in time series prediction in recent years, but the dilated causal convolution structure leaves it unable to effectively learn the dependencies between data at different time points. This paper proposes a method for stock ranking prediction. To enhance the ability of TCN to handle dependencies within series, we first develop a channel-time dual attention module (CTAM). In conjunction with TCN to process complex historical stock price data, CTAM can adaptively learn the importance of multiple price nature series of stocks and model the dependencies between the data at different times. On the other hand, due to the market industry rotation, some stocks with specific industry attributes may become market preference for a period time. To apply the industry attributes to the stock prediction, we construct an industry-stock Pearson correlation matrix and extract a vector that fully characterizes the industry attributes of stocks from it through a matrix factorization algorithm. Furthermore, the historical market preference is modeled according to the industry attribute of the stocks to generate the dynamic correlation between stocks and market preference, and this correlation is combined with the historical price features extracted by TCN for stock ranking prediction. We conduct experiments on three datasets of 950 constituent stocks of the Shanghai Stock Exchange Index, 750 constituent stocks of the Shenzhen Stock Exchange 1000 Index and 486 stocks of the S&P500 to demonstrate the effectiveness of the proposed method. On the Shanghai Stock Exchange Index dataset, the Investment Return Ratio (IRR) obtained by using the predict results of our method to guide the exchange reached 1.416, and the Sharpe Ratio (SR) reached 2.346. On the Shenzhen Stock Exchange Index dataset, the IRR reached 1.434 and the Sharpe ratio reached 2.317. On the S&P500, the IRR reached 1.491 and the Sharpe ratio reached 2.031. 相似文献
104.
气候变化背景下辽宁省气候资源变化特征分析 总被引：11，自引：0，他引：11
采用辽宁省54个气象台站建站以来的气温、降水、积温、风速、日照、蒸发等9个气象要素年资料,分析了近半个世纪辽宁省气候资源变化的空间、时间特征,以及其变化对农业和气象能源的影响.结果表明:辽宁省各地的气温、积温普遍为增高趋势,降水、风速、日照、蒸发普遍为减少倾向;气温、积温、日照、蒸发等均具有突变性和阶段性特征,风速、最低气温无显著突变性,而是存在明显的趋势性;从长远看,气候资源变化对辽宁省农业生产和生态环境的影响是弊大于利;虽然观测表明风速有下降趋势,但不能说明风能资源蕴藏量有下降趋势,需要今后进一步关注,但太阳能资源有一定的减少倾向;辽西地区易发展太阳能资源开发利用项目. 相似文献
105.
上海地区太阳总辐射及其时空分布特征 总被引：2，自引：0，他引：2
根据上海地区徐家汇站1961年-1990年月太阳总辐射量与月日照百分率、月平均总云量、月相对湿度、月浮尘烟霾总数等气象要素,运用太阳总辐射气候学计算原理,选定上海地区不同太阳总辐射的气候学计算公式,并用选定的公式计算出1991年-2008年宝山月太阳总辐射量值.然后根据宝山站计算值与实测值的最小误差(6.3%)确定适合上海地区月太阳总辐射的气候学计算公式.最后依据确定的气候学计算公式推算上海地区各气象站1961年-2008年累年各月太阳总辐射量,并分析上海地区太阳总辐射的时空变化特征,结果表明:上海地区7月总辐射量最多,其次是8月和5月,6月正午太阳高度角虽最大,但天空遮蔽度比5月、7月、8月大,因此总辐射量比5月、7月、8月要少.因上海地区地域面积小,太阳总辐射的空间分布略有差异.太阳总辐射量的空间分布差异为:年东北部及南部沿海地区最多;春季东北部最多;夏季南部沿海最多;秋冬季北部最多;7月~8月差异略为明显,其它月差异较小. 相似文献
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