BACKGROUND Thoracolumbar fractures are generally combined with spinal cord injury to varying degrees,which may cause deterioration of the patients’condition and increase the difficulty of clinical treatment.At presen...BACKGROUND Thoracolumbar fractures are generally combined with spinal cord injury to varying degrees,which may cause deterioration of the patients’condition and increase the difficulty of clinical treatment.At present,anterior or combined anterior-posterior surgery is preferred for severe thoracolumbar fractures.AIM To investigate the effectiveness and postoperative rehabilitation of one-stage combined anterior-posterior surgery for severe thoracolumbar fractures with spinal cord injury.METHODS One-hundred-and-twenty patients who received surgery for severe thoracolumbar fractures with spinal cord injury at our hospital from February 2018 to February 2020 were randomly enrolled.They were randomly divided into group 1(one-stage combined anterior-posterior surgery,n=60)and group 2(onestage anterior-approach surgery,n=60).Treatment efficacy was compared between the two groups.RESULTS Blood loss was greater and the operation time was longer in group 1 than in group 2,and the differences were statistically significant(P<0.05).Incision length,intraoperative X-rays,and length of hospital stay were not significantly different between the two groups(P>0.05).Preoperative function of the affected vertebrae was not significantly different between the two groups(P>0.05).In each group,the patients showed significant improvement after surgery.The anterior vertebral height ratio and the posterior vertebral height ratio in group 1 after surgery were significantly higher than those in group 2.The Cobb angle after surgery was significantly lower in group 1 than in group 2(P<0.05).The canal-occupying ratio of the affected vertebrae was not significantly different between the two groups(P>0.05).Before surgery,there was no significant difference in the quality of life scores between the two groups(P>0.05).The above indicators were significantly improved after surgery compared with before surgery in each group.In addition,these indicators were markedly better in group 1 than in group 2 after surgery(P<0.05 for each).CONCLUSION One-stage combined anterior-posterior surgery effectively improves the function of the affected vertebrae and the life quality of patients with severe thoracolumbar fractures and spinal cord injury.This surgical approach is worthy of popularization in clinical use.展开更多
快速准确识别出周围车辆的换道意图对高级自动驾驶辅助系统的决策支持和安全预防具有重要意义。针对现有方法未能充分考虑车辆之间的交互作用以及轨迹数据的前后依赖性问题,提出一种基于多模型融合的换道意图识别框架。该换道意图识别...快速准确识别出周围车辆的换道意图对高级自动驾驶辅助系统的决策支持和安全预防具有重要意义。针对现有方法未能充分考虑车辆之间的交互作用以及轨迹数据的前后依赖性问题,提出一种基于多模型融合的换道意图识别框架。该换道意图识别框架主要包括输入处理与换道意图识别两部分。输入处理部分对车辆轨迹数据进行清洗、贴标、切片以及one-hot编码。换道意图识别部分则具体提出BiLSTM-F(BiLSTM-fusion)模型,在该模型中将注意力机制(attention mechanism)引入双向长短期记忆网络(BiLSTM),对输入处理部分的输出信息进行权重划分,使模型能将注意力更加集中于对换道意图影响较大的特征信息上,最后引入条件随机场(conditional random field),充分学习输入数据的前后依赖性并快速找出全局最优的换道意图。实验中使用公开数据集NGSIM进行训练并评估,验证结果表明该模型的准确率最高能达到97.19%,并且可在车辆到达换道点前2 s识别车辆的换道意图,准确率为94.16%。与基线换道意图识别模型相比,所提出模型的准确率、损失、F1值和稳定性均优于基线模型。展开更多
文摘BACKGROUND Thoracolumbar fractures are generally combined with spinal cord injury to varying degrees,which may cause deterioration of the patients’condition and increase the difficulty of clinical treatment.At present,anterior or combined anterior-posterior surgery is preferred for severe thoracolumbar fractures.AIM To investigate the effectiveness and postoperative rehabilitation of one-stage combined anterior-posterior surgery for severe thoracolumbar fractures with spinal cord injury.METHODS One-hundred-and-twenty patients who received surgery for severe thoracolumbar fractures with spinal cord injury at our hospital from February 2018 to February 2020 were randomly enrolled.They were randomly divided into group 1(one-stage combined anterior-posterior surgery,n=60)and group 2(onestage anterior-approach surgery,n=60).Treatment efficacy was compared between the two groups.RESULTS Blood loss was greater and the operation time was longer in group 1 than in group 2,and the differences were statistically significant(P<0.05).Incision length,intraoperative X-rays,and length of hospital stay were not significantly different between the two groups(P>0.05).Preoperative function of the affected vertebrae was not significantly different between the two groups(P>0.05).In each group,the patients showed significant improvement after surgery.The anterior vertebral height ratio and the posterior vertebral height ratio in group 1 after surgery were significantly higher than those in group 2.The Cobb angle after surgery was significantly lower in group 1 than in group 2(P<0.05).The canal-occupying ratio of the affected vertebrae was not significantly different between the two groups(P>0.05).Before surgery,there was no significant difference in the quality of life scores between the two groups(P>0.05).The above indicators were significantly improved after surgery compared with before surgery in each group.In addition,these indicators were markedly better in group 1 than in group 2 after surgery(P<0.05 for each).CONCLUSION One-stage combined anterior-posterior surgery effectively improves the function of the affected vertebrae and the life quality of patients with severe thoracolumbar fractures and spinal cord injury.This surgical approach is worthy of popularization in clinical use.
文摘快速准确识别出周围车辆的换道意图对高级自动驾驶辅助系统的决策支持和安全预防具有重要意义。针对现有方法未能充分考虑车辆之间的交互作用以及轨迹数据的前后依赖性问题,提出一种基于多模型融合的换道意图识别框架。该换道意图识别框架主要包括输入处理与换道意图识别两部分。输入处理部分对车辆轨迹数据进行清洗、贴标、切片以及one-hot编码。换道意图识别部分则具体提出BiLSTM-F(BiLSTM-fusion)模型,在该模型中将注意力机制(attention mechanism)引入双向长短期记忆网络(BiLSTM),对输入处理部分的输出信息进行权重划分,使模型能将注意力更加集中于对换道意图影响较大的特征信息上,最后引入条件随机场(conditional random field),充分学习输入数据的前后依赖性并快速找出全局最优的换道意图。实验中使用公开数据集NGSIM进行训练并评估,验证结果表明该模型的准确率最高能达到97.19%,并且可在车辆到达换道点前2 s识别车辆的换道意图,准确率为94.16%。与基线换道意图识别模型相比,所提出模型的准确率、损失、F1值和稳定性均优于基线模型。
