目的：评价自制股尺在股动静脉穿刺中的应用效果。方法选取2012年12月—2013年11月收治的100例患者作为观察组,采取自制股尺对患者进行测量计算,再进行股动脉、股静脉穿刺,选取2011年12月—2012年11月收治的100例患者作为对照组,对照组...目的：评价自制股尺在股动静脉穿刺中的应用效果。方法选取2012年12月—2013年11月收治的100例患者作为观察组,采取自制股尺对患者进行测量计算,再进行股动脉、股静脉穿刺,选取2011年12月—2012年11月收治的100例患者作为对照组,对照组未使用自制股尺,直接进行股动脉、股静脉穿刺。比较两组穿刺成功率、患者及患者家属对穿刺情况的满意度。结果观察组股动脉、股静脉穿刺一次成功率分别为92%,90%,分别高于对照组的78%,76%,差异有统计学意义（χ^2=7.686,6.945；P〈0.01）。观察组患者总满意度94%,高于对照组的78%,差异有统计学意义（ Z =-4.237,P〈0.01）。结论自制股尺运用后可提升一次穿刺成功率,并提升患者满意度,具有较高的临床价值。展开更多
In order to determine the effect of twine thickness on the size-selectivity of the driftnet used for the yellow croaker, size-selectivity tests were conducted with three different twine thicknesses(monofi lament diame...In order to determine the effect of twine thickness on the size-selectivity of the driftnet used for the yellow croaker, size-selectivity tests were conducted with three different twine thicknesses(monofi lament diameters of 0.279 mm(number's method; No. 3), 0.321 mm(No. 4), and 0.360 mm(No. 5)) of driftnets for the yellow croaker in the seas around Chooja-do, Jeju Islands. The selectivity curve was estimated by using Kitahara's method. In order to determine the physical properties of the twine used in the experimental fi shing nets, we measured the breaking load, elongation, and stiffness under both dry and wet conditions. In terms of physical properties, the thinnest twine(No. 3) had the strongest breaking strength per unit cross-sectional area, along with good elongation and excellent fl exibility. The thickest twine(No. 5) had the lowest fl exibility. In terms of selectivity, the net of No. 3 twine showed the broadest selection range and, thus, a relatively low selectivity compared with the other nets, while the less fl exible net of No. 5 twine showed the narrowest selectivity range and high selectivity. In addition, it was found that a thicker twine resulted in a smaller haul of small fi sh. Therefore, it can be inferred that the thickness of the twine affects the size of the catch and selectivity, and thus the size composition of the catch as well.展开更多
Price volatility in stock market brings potential profile positions to the traders. How to predict the direction of the stock market or stock price becomes the primary job for traders＇ trading model. We are looking f...Price volatility in stock market brings potential profile positions to the traders. How to predict the direction of the stock market or stock price becomes the primary job for traders＇ trading model. We are looking for the direction of the market in a given timeframe. High-frequency traders will consider the potential profile-out position in millisecond level. Long-term holder will look into month time scale. For most of average traders, the ideal timeframe will be on daily base. In this paper, for a non-news trading day, the author will introduce statistics method to predict the stock prices and bid-ask spread for day trading.展开更多
文摘目的：评价自制股尺在股动静脉穿刺中的应用效果。方法选取2012年12月—2013年11月收治的100例患者作为观察组,采取自制股尺对患者进行测量计算,再进行股动脉、股静脉穿刺,选取2011年12月—2012年11月收治的100例患者作为对照组,对照组未使用自制股尺,直接进行股动脉、股静脉穿刺。比较两组穿刺成功率、患者及患者家属对穿刺情况的满意度。结果观察组股动脉、股静脉穿刺一次成功率分别为92%,90%,分别高于对照组的78%,76%,差异有统计学意义（χ^2=7.686,6.945；P〈0.01）。观察组患者总满意度94%,高于对照组的78%,差异有统计学意义（ Z =-4.237,P〈0.01）。结论自制股尺运用后可提升一次穿刺成功率,并提升患者满意度,具有较高的临床价值。
基金Supported by the National Institute of Fisheries Science(No.R2015041)
文摘In order to determine the effect of twine thickness on the size-selectivity of the driftnet used for the yellow croaker, size-selectivity tests were conducted with three different twine thicknesses(monofi lament diameters of 0.279 mm(number's method; No. 3), 0.321 mm(No. 4), and 0.360 mm(No. 5)) of driftnets for the yellow croaker in the seas around Chooja-do, Jeju Islands. The selectivity curve was estimated by using Kitahara's method. In order to determine the physical properties of the twine used in the experimental fi shing nets, we measured the breaking load, elongation, and stiffness under both dry and wet conditions. In terms of physical properties, the thinnest twine(No. 3) had the strongest breaking strength per unit cross-sectional area, along with good elongation and excellent fl exibility. The thickest twine(No. 5) had the lowest fl exibility. In terms of selectivity, the net of No. 3 twine showed the broadest selection range and, thus, a relatively low selectivity compared with the other nets, while the less fl exible net of No. 5 twine showed the narrowest selectivity range and high selectivity. In addition, it was found that a thicker twine resulted in a smaller haul of small fi sh. Therefore, it can be inferred that the thickness of the twine affects the size of the catch and selectivity, and thus the size composition of the catch as well.
文摘Price volatility in stock market brings potential profile positions to the traders. How to predict the direction of the stock market or stock price becomes the primary job for traders＇ trading model. We are looking for the direction of the market in a given timeframe. High-frequency traders will consider the potential profile-out position in millisecond level. Long-term holder will look into month time scale. For most of average traders, the ideal timeframe will be on daily base. In this paper, for a non-news trading day, the author will introduce statistics method to predict the stock prices and bid-ask spread for day trading.
