In this paper, we propose a new method to estimate the wave height of a specifi c return period based on the Hurst rule and a self-affi ne fractal formula. A detailed description of our proposed model is presented in ...In this paper, we propose a new method to estimate the wave height of a specifi c return period based on the Hurst rule and a self-affi ne fractal formula. A detailed description of our proposed model is presented in this paper. We use the proposed model to analyze wave height data recorded along the coast of Chaolian Island from 1963 to 1989. The results show that the performance of our proposed model in estimating design wave heights is superior to traditional models.展开更多
目的:比较高度公式引导法与胸骨角引导法预测小儿中心静脉导管(CVC)置管深度方法的效果差异。方法:回顾性分析2014年1月至2021年1月接受右颈内静脉导管术205例的儿童资料,使用胸骨角引导(S组)101例,使用高度公式引导(H组)104例。比较两...目的:比较高度公式引导法与胸骨角引导法预测小儿中心静脉导管(CVC)置管深度方法的效果差异。方法:回顾性分析2014年1月至2021年1月接受右颈内静脉导管术205例的儿童资料,使用胸骨角引导(S组)101例,使用高度公式引导(H组)104例。比较两组人口统计学特征、导管尖端到心尖的距离、CVC尖端和心尖的相对位置、术后相关并发症及尖端位置的术后调整。结果:与H组相比,S组的CVC头端到心窝的垂直长度明显浅(-8.93±6.41 mm vs.3.76±13.35 mm,P<0.001),且CVC头端高于心窝的数量更多(98.0%vs.47.1%,P<0.001)。在S组中无患儿需要在术后调整CVC位置,也无并发症发生。H组术后需要调整CVC位置4例,其中与CVC相关的心律失常3例,导管功能障碍1例。结论:胸骨角引导法可能是比高度公式引导法预测小儿中心静脉置管深度更安全的方法。展开更多
基金Supported by the National Natural Science Foundation of China’s“Study on Multi-objective Four-layer Nested Probability Model(MOFLNPM)and its Application to Risk Assessment for Coastal Engineering”(No.51379195)the Shandong Province Natural Science“Study on the Risk Assessments and Statistical Analysis of Marine Engineering based on Multi-target Three-level Nested Statistical Model”(No.ZR2013EEM034)+1 种基金the National Natural Science Foundation of China(No.41476078)the Science Research Program of Zhejiang Province(No.2015C34013)
文摘In this paper, we propose a new method to estimate the wave height of a specifi c return period based on the Hurst rule and a self-affi ne fractal formula. A detailed description of our proposed model is presented in this paper. We use the proposed model to analyze wave height data recorded along the coast of Chaolian Island from 1963 to 1989. The results show that the performance of our proposed model in estimating design wave heights is superior to traditional models.
文摘目的:比较高度公式引导法与胸骨角引导法预测小儿中心静脉导管(CVC)置管深度方法的效果差异。方法:回顾性分析2014年1月至2021年1月接受右颈内静脉导管术205例的儿童资料,使用胸骨角引导(S组)101例,使用高度公式引导(H组)104例。比较两组人口统计学特征、导管尖端到心尖的距离、CVC尖端和心尖的相对位置、术后相关并发症及尖端位置的术后调整。结果:与H组相比,S组的CVC头端到心窝的垂直长度明显浅(-8.93±6.41 mm vs.3.76±13.35 mm,P<0.001),且CVC头端高于心窝的数量更多(98.0%vs.47.1%,P<0.001)。在S组中无患儿需要在术后调整CVC位置,也无并发症发生。H组术后需要调整CVC位置4例,其中与CVC相关的心律失常3例,导管功能障碍1例。结论:胸骨角引导法可能是比高度公式引导法预测小儿中心静脉置管深度更安全的方法。