SUN Da-peng BAO Wei-bin, WU Hao and LI Yu-cheng （ In this paper the 0-1 combined BEM is adopted to subdivide the computational domain boundary, and to discretize the Green＇s integral expression based on Laplace equ...SUN Da-peng BAO Wei-bin, WU Hao and LI Yu-cheng （ In this paper the 0-1 combined BEM is adopted to subdivide the computational domain boundary, and to discretize the Green＇s integral expression based on Laplace equation. The FEM is used to subdivide the wave surface and deduce the surface equation which satisfies the nonlinear boundary conditions on the surface. The equations with potential function and wave surface height as an unknown quantity by application of Taylor expansion approach can be solved by iteration within the time step. In m-time iteration within the computational process of time step （n-1）At to nat, the results of the previous iteration are taken as the initial value of the two-order unknown terms in the present iteration. Thus, an improved tracking mode of nonlinear wave surface is estabIished, and numerical results of wave tank test indicate that this mode is improved obviously and is more precise than the previous numerical model which ignored the two-order unknown terms of wave surface location and velocity potential function in comparison with the theoretical values.展开更多
Muscle-in-vein conduits are used alternatively to nerve grafts for bridging nerve defects. The purpose of this study was to examine short- and long-term regeneration results after digital nerve reconstruction with mus...Muscle-in-vein conduits are used alternatively to nerve grafts for bridging nerve defects. The purpose of this study was to examine short- and long-term regeneration results after digital nerve reconstruction with muscle-in-vein conduits. Static and moving two-point discriminations and Semmes-Weinstein Monofilaments were used to evaluate sensory recovery 6–12 months and 14–35 months after repair of digital nerves with muscle-in-vein in 7 cases. Both follow-ups were performed after clinical signs of progressing regeneration disappeared. In 4 of 7 cases, a further recovery of both two-point discriminations and in another case of only the static two-point discrimination of 1–3 mm could be found between the short-term and long-term follow-up examination. Moreover, a late recovery of both two-point discriminations was demonstrated in another case. Four of 7 cases showed a sensory improvement by one Semmes-Weinstein Monofilaments. This pilot study suggests that sensory recovery still takes place even when clinical signs of progressing regeneration disappear.展开更多
不同海区的近岸海浪浪高具有明显差异性。针对当前大部分时间序列预测模型缺乏对不同地区(多源)浪高预测的适应性难题,提出了一种基于局部加权回归的多周期趋势分解(Seasonal and Trend decomposition using Loess,STL)和两级融合策略...不同海区的近岸海浪浪高具有明显差异性。针对当前大部分时间序列预测模型缺乏对不同地区(多源)浪高预测的适应性难题,提出了一种基于局部加权回归的多周期趋势分解(Seasonal and Trend decomposition using Loess,STL)和两级融合策略的浪高预测模型,简称为MSTL-WH(Multiple STL-Wave Height)。结合多源近岸浪高时间序列的多周期性、非线性和非平稳性的特点,首先利用周期图法提取多源近岸浪高数据集中的4个主要周期,并基于主要周期进行多次STL分解,将复杂的原始浪高序列分解为周期项、趋势项和余项;然后利用长短期记忆网络(Long Short Term Memory,LSTM)并结合两级融合策略,搭建近岸浪高预测网络;最后使用自注意力机制重新调整权重并输出未来12 h的浪高值。通过与当前主流时间序列预测方法对比,验证了所提方法在多源近岸浪高序列预测中具有较好的实用性和更低的预测误差。展开更多
The objective of this paper is to calculate the third virial coefficient in Hartree approximation, Hartree-Fock approximation and the MontrollWard contribution of plasma byusing the Green’s function technique in term...The objective of this paper is to calculate the third virial coefficient in Hartree approximation, Hartree-Fock approximation and the MontrollWard contribution of plasma byusing the Green’s function technique in terms of the interaction parameter , and used the result to calculate the quantum thermodynamic functions for one and two component plasma in the case of , where is the thermal De Broglie wave-length. We compared our results with others.展开更多
指数和C(m,n,r,s;q)的高次幂均值计算与上界估计方面的研究与诸多数论问题联系密切,例如华林问题等。设p为奇素数,关注参数n=1,指数幂r=4,s=2条件下的一类二项指数和的四次幂均值计算问题。利用解析方法,借助Dirichlet特征的奇偶性、正...指数和C(m,n,r,s;q)的高次幂均值计算与上界估计方面的研究与诸多数论问题联系密切,例如华林问题等。设p为奇素数,关注参数n=1,指数幂r=4,s=2条件下的一类二项指数和的四次幂均值计算问题。利用解析方法,借助Dirichlet特征的奇偶性、正交性及特征和的性质,研究了形如C(m,1,4,2;p)的二项指数和的四次均值计算,给出了在素数p≡3 mod 4情况下上述二项指数和的一个精确的计算公式。同时,对于此类研究内容,该文也提出了一些有待解决的公开问题。展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 50921001)
文摘SUN Da-peng BAO Wei-bin, WU Hao and LI Yu-cheng （ In this paper the 0-1 combined BEM is adopted to subdivide the computational domain boundary, and to discretize the Green＇s integral expression based on Laplace equation. The FEM is used to subdivide the wave surface and deduce the surface equation which satisfies the nonlinear boundary conditions on the surface. The equations with potential function and wave surface height as an unknown quantity by application of Taylor expansion approach can be solved by iteration within the time step. In m-time iteration within the computational process of time step （n-1）At to nat, the results of the previous iteration are taken as the initial value of the two-order unknown terms in the present iteration. Thus, an improved tracking mode of nonlinear wave surface is estabIished, and numerical results of wave tank test indicate that this mode is improved obviously and is more precise than the previous numerical model which ignored the two-order unknown terms of wave surface location and velocity potential function in comparison with the theoretical values.
文摘Muscle-in-vein conduits are used alternatively to nerve grafts for bridging nerve defects. The purpose of this study was to examine short- and long-term regeneration results after digital nerve reconstruction with muscle-in-vein conduits. Static and moving two-point discriminations and Semmes-Weinstein Monofilaments were used to evaluate sensory recovery 6–12 months and 14–35 months after repair of digital nerves with muscle-in-vein in 7 cases. Both follow-ups were performed after clinical signs of progressing regeneration disappeared. In 4 of 7 cases, a further recovery of both two-point discriminations and in another case of only the static two-point discrimination of 1–3 mm could be found between the short-term and long-term follow-up examination. Moreover, a late recovery of both two-point discriminations was demonstrated in another case. Four of 7 cases showed a sensory improvement by one Semmes-Weinstein Monofilaments. This pilot study suggests that sensory recovery still takes place even when clinical signs of progressing regeneration disappear.
文摘不同海区的近岸海浪浪高具有明显差异性。针对当前大部分时间序列预测模型缺乏对不同地区(多源)浪高预测的适应性难题,提出了一种基于局部加权回归的多周期趋势分解(Seasonal and Trend decomposition using Loess,STL)和两级融合策略的浪高预测模型,简称为MSTL-WH(Multiple STL-Wave Height)。结合多源近岸浪高时间序列的多周期性、非线性和非平稳性的特点,首先利用周期图法提取多源近岸浪高数据集中的4个主要周期,并基于主要周期进行多次STL分解,将复杂的原始浪高序列分解为周期项、趋势项和余项;然后利用长短期记忆网络(Long Short Term Memory,LSTM)并结合两级融合策略,搭建近岸浪高预测网络;最后使用自注意力机制重新调整权重并输出未来12 h的浪高值。通过与当前主流时间序列预测方法对比,验证了所提方法在多源近岸浪高序列预测中具有较好的实用性和更低的预测误差。
文摘The objective of this paper is to calculate the third virial coefficient in Hartree approximation, Hartree-Fock approximation and the MontrollWard contribution of plasma byusing the Green’s function technique in terms of the interaction parameter , and used the result to calculate the quantum thermodynamic functions for one and two component plasma in the case of , where is the thermal De Broglie wave-length. We compared our results with others.
文摘指数和C(m,n,r,s;q)的高次幂均值计算与上界估计方面的研究与诸多数论问题联系密切,例如华林问题等。设p为奇素数,关注参数n=1,指数幂r=4,s=2条件下的一类二项指数和的四次幂均值计算问题。利用解析方法,借助Dirichlet特征的奇偶性、正交性及特征和的性质,研究了形如C(m,1,4,2;p)的二项指数和的四次均值计算,给出了在素数p≡3 mod 4情况下上述二项指数和的一个精确的计算公式。同时,对于此类研究内容,该文也提出了一些有待解决的公开问题。
