目的 比较传统2D胸腔镜和Flex-3D胸腔镜在非小细胞肺癌(NSCLC)患者肺叶切除术中的应用效果。方法 回顾性选取2021年11月—2023年7月在徐州市贾汪区人民医院行肺叶切除术的NSCLC患者83例为研究对象。根据术中胸腔镜使用类型将患者分为Fle...目的 比较传统2D胸腔镜和Flex-3D胸腔镜在非小细胞肺癌(NSCLC)患者肺叶切除术中的应用效果。方法 回顾性选取2021年11月—2023年7月在徐州市贾汪区人民医院行肺叶切除术的NSCLC患者83例为研究对象。根据术中胸腔镜使用类型将患者分为Flex-3D组46例和2D组37例。2D组患者接受传统2D胸腔镜肺叶切除术,Flex-3D组患者接受Flex-3D胸腔镜肺叶切除术。术后15、30 d采用门诊复诊方式进行随访。比较两组围术期指标(手术时间、术中出血量、24 h引流量、引流管留置时间和住院时间)、pTNM分期、淋巴结清扫数量,术后3、15、30 d数字评定量表(NRS)评分,术前及术后15、30 d肺功能指标[用力肺活量(FVC)、第1秒用力呼气容积占预计值的百分比(FEV_(1)%)],术后并发症(肺不张、肺部感染、肺栓塞、心律失常)发生率。结果 Flex-3D组手术时间、引流管留置时间、住院时间短于2D组,术中出血量、24 h引流量少于2D组(P<0.05)。两组pTNM分期、淋巴结清扫数量比较,差异无统计学意义(P>0.05)。手术方法和时间在NRS评分上存在交互作用(P<0.05);手术方法、时间在NRS评分上主效应显著(P<0.05)。Flex-3D组术后15 d NRS评分高于2D组,术后30 d NRS评分低于2D组(P<0.05);两组术后15、30 d NRS评分分别低于本组术后3 d,术后30 d NRS评分分别低于本组术后15 d(P<0.05)。手术方法和时间在FVC、FEV_(1)%上不存在交互作用(P>0.05);手术方法、时间在FVC、FEV_(1)%上主效应显著(P<0.05)。Flex-3D组术后15、30 d FVC、FEV_(1)%高于2D组(P<0.05);两组术后15、30 d FVC、FEV_(1)%分别低于本组术前,术后30 d FVC、FEV_(1)%分别高于本组术后15 d(P<0.05)。两组术后肺不张、肺部感染、肺栓塞、心律失常发生率比较,差异无统计学意义(P>0.05)。结论 与传统2D胸腔镜肺叶切除术相比,Flex-3D胸腔镜肺叶切除术能更有效地缩短NSCLC患者手术时间,减少出血量,进而缩短术后恢复时间,其还能更有效地减轻患者术后30 d疼痛,促进术后肺功能的恢复,且二者的安全性相当。展开更多
Due to the proliferation of underwater vehicles and sensors,underwater wireless optical communication(UWOC)is a key enabler for ocean exploration with a strong reliance on short-range bandwidth-intensive communication...Due to the proliferation of underwater vehicles and sensors,underwater wireless optical communication(UWOC)is a key enabler for ocean exploration with a strong reliance on short-range bandwidth-intensive communications.A stable optical link is of primary importance for UWOC.A compact,low-power,and low-cost acquisition,pointing,and tracking(APT)system is proposed and experimentally demonstrated to realign the optical link within 0.04 s,even when the UWOC transmitter and receiver are in relative motion.The system successfully achieves rapid auto-alignment through a 4 m tap water channel with a relatively large number of bubbles.Furthermore,the required minimum illumination value is measured to be as low as7.1 lx,implying that the proposed APT scheme is robust to dim underwater environments.Meanwhile,mobility experiments are performed to verify the performance of the APT system.The proposed system can rapidly and automatically align moving targets in complex and unstable underwater environments,which can potentially boost the practical applications of UWOC.展开更多
Security is one of the key issues in communications,but it has not attracted much attention in the field of underwater wireless optical communication(UWOC).This Letter proposes a UWOC encryption scheme with orthogonal...Security is one of the key issues in communications,but it has not attracted much attention in the field of underwater wireless optical communication(UWOC).This Letter proposes a UWOC encryption scheme with orthogonal frequency division multiplexing(OFDM)modulation,based on the three-layer chaotic encryption and chaotic discrete Fourier transform(DFT)precoding.The three-layer chaotic encryption processes are bit stream diffusion,in-phase/quadrature encryption,and time-frequency scrambling.With multi-fold data encryption,the scheme can create a keyspace of 9.7×10^(179),effectively resisting brute force attacks and chosen-plaintext attacks.A 3 Gbit/s encrypted OFDM signal is successfully transmitted over a 7 m water channel.展开更多
文摘目的 比较传统2D胸腔镜和Flex-3D胸腔镜在非小细胞肺癌(NSCLC)患者肺叶切除术中的应用效果。方法 回顾性选取2021年11月—2023年7月在徐州市贾汪区人民医院行肺叶切除术的NSCLC患者83例为研究对象。根据术中胸腔镜使用类型将患者分为Flex-3D组46例和2D组37例。2D组患者接受传统2D胸腔镜肺叶切除术,Flex-3D组患者接受Flex-3D胸腔镜肺叶切除术。术后15、30 d采用门诊复诊方式进行随访。比较两组围术期指标(手术时间、术中出血量、24 h引流量、引流管留置时间和住院时间)、pTNM分期、淋巴结清扫数量,术后3、15、30 d数字评定量表(NRS)评分,术前及术后15、30 d肺功能指标[用力肺活量(FVC)、第1秒用力呼气容积占预计值的百分比(FEV_(1)%)],术后并发症(肺不张、肺部感染、肺栓塞、心律失常)发生率。结果 Flex-3D组手术时间、引流管留置时间、住院时间短于2D组,术中出血量、24 h引流量少于2D组(P<0.05)。两组pTNM分期、淋巴结清扫数量比较,差异无统计学意义(P>0.05)。手术方法和时间在NRS评分上存在交互作用(P<0.05);手术方法、时间在NRS评分上主效应显著(P<0.05)。Flex-3D组术后15 d NRS评分高于2D组,术后30 d NRS评分低于2D组(P<0.05);两组术后15、30 d NRS评分分别低于本组术后3 d,术后30 d NRS评分分别低于本组术后15 d(P<0.05)。手术方法和时间在FVC、FEV_(1)%上不存在交互作用(P>0.05);手术方法、时间在FVC、FEV_(1)%上主效应显著(P<0.05)。Flex-3D组术后15、30 d FVC、FEV_(1)%高于2D组(P<0.05);两组术后15、30 d FVC、FEV_(1)%分别低于本组术前,术后30 d FVC、FEV_(1)%分别高于本组术后15 d(P<0.05)。两组术后肺不张、肺部感染、肺栓塞、心律失常发生率比较,差异无统计学意义(P>0.05)。结论 与传统2D胸腔镜肺叶切除术相比,Flex-3D胸腔镜肺叶切除术能更有效地缩短NSCLC患者手术时间,减少出血量,进而缩短术后恢复时间,其还能更有效地减轻患者术后30 d疼痛,促进术后肺功能的恢复,且二者的安全性相当。
基金the National Natural Science Foundation of China(NSFC)(Nos.61971378 and 61671409)National Key Research and DevelopmentProgram of China(Nos.2016YFC1401202,2017YFC0306601,and2017YFC0306100)Strategic Priority Research Program of the ChineseAcademy of Sciences(No.XDA22030208)。
文摘Due to the proliferation of underwater vehicles and sensors,underwater wireless optical communication(UWOC)is a key enabler for ocean exploration with a strong reliance on short-range bandwidth-intensive communications.A stable optical link is of primary importance for UWOC.A compact,low-power,and low-cost acquisition,pointing,and tracking(APT)system is proposed and experimentally demonstrated to realign the optical link within 0.04 s,even when the UWOC transmitter and receiver are in relative motion.The system successfully achieves rapid auto-alignment through a 4 m tap water channel with a relatively large number of bubbles.Furthermore,the required minimum illumination value is measured to be as low as7.1 lx,implying that the proposed APT scheme is robust to dim underwater environments.Meanwhile,mobility experiments are performed to verify the performance of the APT system.The proposed system can rapidly and automatically align moving targets in complex and unstable underwater environments,which can potentially boost the practical applications of UWOC.
基金supported by the National Natural Science Foundation of China(NSFC)(No.61971378)Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA22030208)Zhoushan-Zhejiang University Joint Research Project(No.2019C81081)。
文摘Security is one of the key issues in communications,but it has not attracted much attention in the field of underwater wireless optical communication(UWOC).This Letter proposes a UWOC encryption scheme with orthogonal frequency division multiplexing(OFDM)modulation,based on the three-layer chaotic encryption and chaotic discrete Fourier transform(DFT)precoding.The three-layer chaotic encryption processes are bit stream diffusion,in-phase/quadrature encryption,and time-frequency scrambling.With multi-fold data encryption,the scheme can create a keyspace of 9.7×10^(179),effectively resisting brute force attacks and chosen-plaintext attacks.A 3 Gbit/s encrypted OFDM signal is successfully transmitted over a 7 m water channel.
