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右心声学造影与RoPE量表在PFO相关隐源性卒中患者中的相关性及初步诊断 认领 引用
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作者 李书涛 张义和 《临床医学进展》 2026年第6期1681-1688,共8页
目的:初步探索经胸右心声学造影(cTTE)分流等级与反常栓塞风险(RoPE)量表在卵圆孔未闭(PFO)相关性隐源性卒中(CS)患者中的相关性,评估二者联合诊断的临床价值。方法:回顾性纳入2023年1月至2025年1月延安大学附属医院心脑血管医院收治的8... 目的:初步探索经胸右心声学造影(cTTE)分流等级与反常栓塞风险(RoPE)量表在卵圆孔未闭(PFO)相关性隐源性卒中(CS)患者中的相关性,评估二者联合诊断的临床价值。方法:回顾性纳入2023年1月至2025年1月延安大学附属医院心脑血管医院收治的86例CS患者,根据辅助检查结果分为PFO-CS组(41例)与非PFO-CS组(45例)。收集两组患者临床资料,采用cTTE评估右向左分流(RLS)等级,计算RoPE评分,分析两组指标差异、cTTE与RoPE评分的相关性。结果:① PFO-CS组RoPE评分[(6.12 ± 0.98)分]、皮层梗死率(70.7%)显著高于非PFO-CS组[(3.36 ± 1.19)分、31.1%] (t = 11.588,χ2 = = 13.471,P均χ2 = 6.744, P P < 0.001);④ 年龄、皮层梗死、无高血压病史、无吸烟史等指标是PFO相关CS发生的重要影响因素。结论:cTTE分流等级与RoPE评分在PFO相关CS患者中呈显著正相关;Valsalva动作可显著提升RLS检出率。 展开更多
关键词 隐源性卒中 卵圆孔未闭 经胸右心声学造影 RoPE量表
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Reconnection of magnetic flux ropes driven by two-color Laguerre–Gaussian laser pulses in plasma 认领 引用
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作者 Yin-Hong Liu Su-Ming Weng Zheng-Ming Sheng 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2025年第4期24-34,共11页
The generation and reconnection of magneticflux ropes in a plasma irradiated by two Laguerre–Gaussian laser pulses with different frequen-cies and opposite topological charges are investigated numerically by particle-... The generation and reconnection of magneticflux ropes in a plasma irradiated by two Laguerre–Gaussian laser pulses with different frequen-cies and opposite topological charges are investigated numerically by particle-in-cell simulations.It is shown that twisted plasma currents and hence magneticflux ropes can be effectively generated as long as the laser frequency difference matches the electron plasma frequency.More importantly,subsequent reconnection of magneticflux ropes can occur.Typical signatures of magnetic reconnection,such as magnetic island formation and plasma heating,are identified in the reconnection of magneticflux ropes.Notably,it is found that a strong axial magneticfield can be generated on the axis,owing to the azimuthal current induced during the reconnection of the ropes.This indicates that in the reconnection of magneticflux ropes,the energy can be transferred not only from the magneticfield to the plasma but also from the plasma current back to the magneticfield.This work opens a new avenue to the study of magneticflux ropes,which helps in understanding magnetic topology changes,and resultant magnetic energy dissipation,plasma heating,and particle acceleration found in solarflares,and magnetic confinement fusion devices. 展开更多
关键词 twisted plasma currents laguerre gaussian laser pulses magnetic islands electron plasma frequency Laguerre Gaussian laser pulses magnetic ux ropes magnetic flux ropes plasma reconnection
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Damage Detection of X-ray Image of Conveyor Belts with Steel Rope Cores Based on Improved FCOS Algorithm 认领 引用 被引量：1
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作者 WANG Baomin DING Hewei +1 位作者 TENG Fei LIU Hongqin 《Journal of Shanghai Jiaotong university(Science)》 EI 2025年第2期309-318,共10页
Aimed at the long and narrow geometric features and poor generalization ability of the damage detection in conveyor belts with steel rope cores using the X-ray image,a detection method of damage X-ray image is propose... Aimed at the long and narrow geometric features and poor generalization ability of the damage detection in conveyor belts with steel rope cores using the X-ray image,a detection method of damage X-ray image is proposed based on the improved fully convolutional one-stage object detection(FCOS)algorithm.The regression performance of bounding boxes was optimized by introducing the complete intersection over union loss function into the improved algorithm.The feature fusion network structure is modified by adding adaptive fusion paths to the feature fusion network structure,which makes full use of the features of accurate localization and semantics of multi-scale feature fusion networks.Finally,the network structure was trained and validated by using the X-ray image dataset of damages in conveyor belts with steel rope cores provided by a flaw detection equipment manufacturer.In addition,the data enhancement methods such as rotating,mirroring,and scaling,were employed to enrich the image dataset so that the model is adequately trained.Experimental results showed that the improved FCOS algorithm promoted the precision rate and the recall rate by 20.9%and 14.8%respectively,compared with the original algorithm.Meanwhile,compared with Fast R-CNN,Faster R-CNN,SSD,and YOLOv3,the improved FCOS algorithm has obvious advantages;detection precision rate and recall rate of the modified network reached 95.8%and 97.0%respectively.Furthermore,it demonstrated a higher detection accuracy without affecting the speed.The results of this work have some reference significance for the automatic identification and detection of steel core conveyor belt damage. 展开更多
关键词 conveyer belts with steel rope cores damage X-ray image image detection improved fully convo-lutional one-stage object detection(FCOS)algorithm
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A new rope-sheave traction contact force model incorporating complex geometric features developed through parameter identification methods 认领 引用
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作者 Yunting HAN Hui HU +1 位作者 Haoran SUN Xi SHI 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2025年第10期1983-2006,共24页
The complex geometrical features of mechanical components significantly influence contact interactions and system dynamics.However,directly modeling contact forces on surfaces with intricate geometries presents consid... The complex geometrical features of mechanical components significantly influence contact interactions and system dynamics.However,directly modeling contact forces on surfaces with intricate geometries presents considerable challenges.This study focuses on the helically twisted wire rope-sheave contact and proposes a contact force model that incorporates complex geometric features through a parameter identification approach.The model's impact on contact forces and system dynamics is thoroughly investigated.Leveraging a point contact model and an elliptic integral approximation,a loss function is formulated using the finite element(FE)contact model results as the reference data.Geometric parameters are subsequently determined by optimizing this loss function via a genetic algorithm(GA).The findings reveal that the contact stiffness increases with the wire rope pitch length,the radius of principal curvature,and the elliptic eccentricity of the contact zone.The proposed contact force model is integrated into a rigid-flexible coupled dynamics model,developed by the absolute node coordinate formulation,to examine the effects of contact geometry on system dynamics.The results demonstrate that the variations in wire rope geometry alter the contact stiffness,which in turn affects dynamic rope tension through frictional energy dissipation.The enhanced model's predictions exhibit superior alignment with the experimental data,thereby validating the methodology.This approach provides new insights for deducing the contact geometry from kinetic parameters and monitoring the performance degradation of mechanical components. 展开更多
关键词 complex contact geometry contact force modeling parameter identification helical wire rope rigid-flexible couple dynamics modeling
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Wire Rope Inspection Robots:A Review 认领 引用
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作者 SUN Bowen YANG Jianhua +3 位作者 LI Baofeng LI Shangyuan WANG Liang XU Zhongqi 《Journal of Shanghai Jiaotong university(Science)》 EI 2025年第6期1144-1161,共18页
Wire rope inspection robot is an important tool for wire rope condition monitoring and maintenance,which can accurately locate and judge the damage of wire rope.In addition,the wire rope inspection robot can also be u... Wire rope inspection robot is an important tool for wire rope condition monitoring and maintenance,which can accurately locate and judge the damage of wire rope.In addition,the wire rope inspection robot can also be used for cable inspection.First,the crawling structure and crawling mode of the wire rope inspection robot are reviewed,and the characteristics and existing problems of each crawling mode are analyzed separately.Next,the drive mode of the wire rope inspection robot is discussed,the types of commonly used motors are introduced,and the advantages and disadvantages of drive motors and the control modes are compared.Then,the method and principle of the non-destructive detection of the wire rope inspection robot are expounded,and the commonly used detection methods and existing deficiencies are compared.After that,the types of communication modes are compared and analyzed,and the types of wireless communication modes are also introduced.Finally,the current difficult problems of the wire rope inspection robot are summarized,and the future development trend of the wire rope inspection robot is prospected. 展开更多
关键词 wire rope cable non-destructive detection inspection robot
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A Brief Discussion on the Development of Non- Destructive Testing Technology for Steel Wire Rope 认领 引用
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作者 Yang Gao Jun Yang +2 位作者 Baohua Qiao Chen Qian Qifu Zhang 《Journal of Electronic Research and Application》 2025年第4期1-7,共7页
In heavy-duty long-distance transmission scenarios,steel wire ropes are widely used due to their unique advantages,and their safety is very important,which has also led to the rapid development of non-destructive test... In heavy-duty long-distance transmission scenarios,steel wire ropes are widely used due to their unique advantages,and their safety is very important,which has also led to the rapid development of non-destructive testing technology for steel wire ropes.The non-destructive testing technology for steel wire ropes is influenced by various factors such as its own structure and external working environment,and the testing process is relatively complex.Multiple testing methods and related types of sensors have also emerged.The electromagnetic detection method is currently the most effective method,but it also has its limitations in development and has not yet fully achieved the expected detection goals.In order to completely replace manual inspection work with the development of non-destructive testing technology for steel wire ropes,more in-depth research and long-term accumulation are still needed. 展开更多
关键词 Wire rope Non-destructive testing Electromagnetic detection method
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TightRope钢板与锁骨钩钢板内固定术治疗RockwoodⅢ型肩锁关节脱位疗效比较 认领 引用 被引量：25
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作者 王天刚 高义斌 +2 位作者 魏艳辉 高志成 邵锋 《新乡医学院学报》 CAS 2020年第4期378-381,共4页
目的比较Tight Rope钢板与锁骨钩钢板内固定术治疗RockwoodⅢ型肩锁关节脱位的临床效果。方法选择2014年6月至2018年3月于新乡医学院第三附属医院采用Tight Rope钢板内固定治疗的20例RockwoodⅢ型肩锁关节脱位患者为观察组,另选择2007年... 目的比较Tight Rope钢板与锁骨钩钢板内固定术治疗RockwoodⅢ型肩锁关节脱位的临床效果。方法选择2014年6月至2018年3月于新乡医学院第三附属医院采用Tight Rope钢板内固定治疗的20例RockwoodⅢ型肩锁关节脱位患者为观察组,另选择2007年5月至2012年3月采用锁骨钩钢板内固定治疗的23例RockwoodⅢ型肩锁关节脱位患者为对照组;对2组患者手术时间、术中失血量、术后住院时间、术后并发症进行比较;术前及术后6个月,采用视觉模拟评分法(VAS)评估2组患者肩关节疼痛情况,采用Constant评分系统和自我评分系统(SSV)评估患者肩关节功能;术后12个月,采用Karlsson标准评估2组患者临床疗效。结果2组患者手术时间比较差异无统计学意义(P>0.05);与对照组比较,观察组患者术中出血量少,术后住院时间短(P0.05);2组患者术后6个月VAS评分显著低于术前,Constant评分和SSV评分显著高于术前(P<0.05);术后6个月,观察组患者VAS评分显著低于对照组,Constant评分和SSV评分显著高于对照组(P<0.05)。术后12个月,观察组和对照组患者治疗效果优良率分别为95.00%(19/20)、69.57%(16/23),观察组患者治疗效果优良率明显高于对照组(χ^2=4.570,P<0.05)。观察组和对照组患者术后并发症发生率分别为5.00%(1/20)、39.13%(9/23),观察组患者并发症发生率低于对照组(χ^2=6.982,P<0.05)。结论与锁骨钩钢板内固定比较,Tight Rope钢板内固定治疗RockwooddⅢ型肩锁关节脱位可以减少术中出血量,更有利于术后肩关节功能恢复,降低并发症发生率。 展开更多
关键词 肩锁关节脱位 Tight Rope钢板 锁骨钩钢板
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Dynamic design of a nonlinear energy sink with NiTiNOL-steel wire ropes based on nonlinear output frequency response functions 认领 引用 被引量：11
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作者 Yewei ZHANG Kefan XU +3 位作者 Jian ZANG Zhiyu NI Yunpeng ZHU Liqun CHEN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2019年第12期1791-1804,共14页
A novel vibration isolation device called the nonlinear energy sink(NES)with NiTiNOL-steel wire ropes(NiTi-ST)is applied to a whole-spacecraft system.The NiTi-ST is used to describe the damping of the NES,which is cou... A novel vibration isolation device called the nonlinear energy sink(NES)with NiTiNOL-steel wire ropes(NiTi-ST)is applied to a whole-spacecraft system.The NiTi-ST is used to describe the damping of the NES,which is coupled with the modified Bouc-Wen model of hysteresis.The NES with NiTi-ST vibration reduction principle uses the irreversibility of targeted energy transfer(TET)to concentrate the energy locally on the nonlinear oscillator,and then dissipates it through damping in the NES with NiTi-ST.The generalized vibration transmissibility,obtained by the root mean square treatment of the harmonic response of the nonlinear output frequency response functions(NOFRFs),is first used as the evaluation index to analyze the whole-spacecraft system in the future.An optimization analysis of the impact of system responses is performed using different parameters of NES with NiTi-ST based on the transmissibility of NOFRFs.Finally,the effects of vibration suppression by varying the parameters of NiTi-ST are analyzed from the perspective of energy absorption.The results indicate that NES with NiTi-ST can reduce excessive vibration of the whole-spacecraft system,without changing its natural frequency.Moreover,the NES with NiTi-ST can be directly used in practical engineering applications. 展开更多
关键词 nonlinear energy sink(NES) vibration isolation NiTiNOL-steel wire rope (NiTi-ST) nonlinear output frequency response function(NOFRF) root mean square transmissibility
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FEASIBILITY AND EXPERIMENT ANALYSIS OF FOUR-ROPES FRICTION HOIST WITHOUT ROPE GROOVES CUTTING 认领 引用
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作者 王广丰 张国忠 +2 位作者 佟刚 李文华 华青松 《Journal of Coal Science & Engineering(China)》 2000年第2期56-59,共4页
Based on theoretical analysis and experiment, when the difference between the ropes length is ensured, the radius difference between the rope grooves and the difference of the rope strain of a double rope friction hoi... Based on theoretical analysis and experiment, when the difference between the ropes length is ensured, the radius difference between the rope grooves and the difference of the rope strain of a double rope friction hoist will decrease with the increasing of hoisting times. Then the rope grooves cutting are not needed. If the connection form of the ropes or the structure of the frictional wheel of a four ropes friction hoist are changed into as a double ropes hoists, the hoist rope grooves will not need to be cut as well, and the working time will be saved and the service life of the rope lining will be lengthened also. 展开更多
关键词 friction hoist without rope grooves cutting abrasion of the rope lining service life of the rope lining
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锁定钢板联合TightRope系统内固定治疗Neer ⅡB型锁骨远端骨折 认领 引用 被引量：13
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作者 白晓东 邢更彦 +2 位作者 姜川 王明新 王振宇 《中国骨与关节损伤杂志》 2017年第7期752-753,共2页
目的观察锁骨远端解剖型锁定钢板联合Tight Rope系统内固定治疗Neer ⅡB型锁骨远端骨折的临床疗效。方法回顾性分析自2012-07—2015-07采用锁骨远端解剖型锁定钢板联合Tight Rope系统内固定治疗的31例Neer ⅡB型锁骨远端骨折。结果本组... 目的观察锁骨远端解剖型锁定钢板联合Tight Rope系统内固定治疗Neer ⅡB型锁骨远端骨折的临床疗效。方法回顾性分析自2012-07—2015-07采用锁骨远端解剖型锁定钢板联合Tight Rope系统内固定治疗的31例Neer ⅡB型锁骨远端骨折。结果本组均获得随访1~4年,平均2.6年。骨折愈合时间平均9.5(8~12)周。末次随访时肩关节功能Constant评分平均96.6(90~100)分,其中疼痛平均13.0(10~15)分,活动范围平均19.5(15~20)分,主动运动平均40.6(38~42)分,肌肉力量平均23.5(22~25)分。按照修正的肩关节MSRS评分评定疗效:优29例,良1例,可1例,优良率为96.8%。结论锁骨远端解剖型锁定钢板联合Tight Rope系统内固定治疗Neer ⅡB型锁骨远端骨折疗效满意,术后并发症少,肩关节功能恢复良好。 展开更多
关键词 Neer ⅡB型锁骨远端骨折 喙锁韧带 Tight Rope系统 锁定钢板 内固定
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Dynamic behavior of bridge-erecting machine subjected to moving mass suspended by wire ropes 认领 引用 被引量：4
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作者 Shaopu YANG Xueqian FANG +1 位作者 Jianchao ZHANG Dujuan WANG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2016年第6期741-748,共8页
The dynamic behavior of a bridge-erecting machine, carrying a moving mass suspended by a wire rope, is investigated. The bridge-erecting machine is modelled by a simply supported uniform beam, and a massless equivale... The dynamic behavior of a bridge-erecting machine, carrying a moving mass suspended by a wire rope, is investigated. The bridge-erecting machine is modelled by a simply supported uniform beam, and a massless equivalent ＂spring-damper＂ system with an effective spring constant and an effective damping coefficient is used to model the moving mass suspended by the wire rope. The suddenly applied load is represented by a unitary Dirac Delta function. With the expansion method, a simple closed-form solution for the equation of motion with the replaced spring-damper-mass system is formulated. The characters of the rope are included in the derivation of the differential equation of motion for the system. The numerical examples show that the effects of the damping coefficient and the spring constant of the rope on the deflection have significant variations with the loading frequency. The effects of the damping coefficient and the spring constant under different beam lengths are also examined. The obtained results validate the presented approach, and provide significant references in the design process of bridgeerecting machines. 展开更多
关键词 bridge-erecting machine wire rope dynamic behavior equivalent ＂spring-damper＂ system
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空心钉与Tight Rope内固定Lisfranc损伤的比较 认领 引用 被引量：10
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作者 于斌 李卫兵 +2 位作者 孙金川 黄笑蕾 孔庆迎 《中国矫形外科杂志》 CAS CSCD 北大核心 2020年第12期1072-1076,共5页
[目的]比较空心钉与Tight Rope内固定治疗lisfranc损伤的临床疗效。[方法]回顾性分析2013年7月~2018年7月本院收治的33例Lisfranc复合体损伤的患者。其中空心钉组19例,Tight Rope组14例,比较两组围手术期、随访与影像资料。[结果]两组... [目的]比较空心钉与Tight Rope内固定治疗lisfranc损伤的临床疗效。[方法]回顾性分析2013年7月~2018年7月本院收治的33例Lisfranc复合体损伤的患者。其中空心钉组19例,Tight Rope组14例,比较两组围手术期、随访与影像资料。[结果]两组患者均顺利完成手术,两组手术时间的差异无统计学意义(P>0.05)。空心钉组2例、Tight Rope组1例切口愈合不良,给予清创换药3周后愈合。空心钉组3例、Tight Rope组2例术后患者足背部局部浅感觉减退,经神经营养治疗术后2~3个月症状消退。33例患者均获随访,时间24~28个月,平均(25.39±1.93)个月。随术后时间推移,两组患者的VAS评分显著减少,而AOFAS评分显著增加(P0.05)。至末次随访时,跖跗关节退变征象空心钉组为7例,Tight Rope组为1例。第1、2跖跗关节不稳征象空心钉组为8例,Tight Rope组为2例,两组差异均有统计学意义(P<0.05)。[结论] Tight Rope修复Lisfranc损伤的临床效果优于空心钉固定。 展开更多
关键词 足 Lisfranc损伤 内固定 Tight-Rope 空心钉
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Distribution of wire deformation within strands of wire ropes 认领 引用 被引量：19
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作者 MA Jun GE Shi-rong ZHANG De-kun 《Journal of China University of Mining and Technology》 2008年第3期475-478,共4页
Using ANSYS software, we developed a modeling program for several kinds of wire ropes with metal cores and built a geometric model for the 6×19 IWS wire rope. Through proper grid partitioning, a finite element mo... Using ANSYS software, we developed a modeling program for several kinds of wire ropes with metal cores and built a geometric model for the 6×19 IWS wire rope. Through proper grid partitioning, a finite element model for calculating the deforma-tion of wire rope was obtained. Completely constraining one end of the wire rope and applying an axial force to the other end, we established the boundary conditions for solving the model. In addition, we numerically simulated the stress and deformation of the wire, obtaining the deformation distribution of each wire within the wire rope under different laying directions. At the end, a tensile test of the 6×19 IWS wire rope was carried out and the results of simulation and experiment compared. 展开更多
关键词 wire rope model deformation finite element
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双尾TightRope系统治疗Rockwood Ⅲ型肩锁关节脱位的临床研究 认领 引用 被引量：6
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作者 王雨辰 王晖 +5 位作者 吴国明 刘百伟 鄂远 俞伟忠 刘延辉 李云峰 《中国骨与关节损伤杂志》 2017年第7期756-757,共2页
目的评估双尾Tight Rope系统内固定治疗Rockwood Ⅲ型肩锁关节脱位的临床疗效,并与Endobutton系统相比较。方法回顾性分析自2013-04—2015-05行喙锁韧带重建术的30例新鲜Rockwood Ⅲ型肩锁关节脱位,14例采用双尾Tight Rope系统内固定(Ti... 目的评估双尾Tight Rope系统内固定治疗Rockwood Ⅲ型肩锁关节脱位的临床疗效,并与Endobutton系统相比较。方法回顾性分析自2013-04—2015-05行喙锁韧带重建术的30例新鲜Rockwood Ⅲ型肩锁关节脱位,14例采用双尾Tight Rope系统内固定(Tight Rope组),16例采用Endobutton系统内固定(Endobutton组)。结果 30例均获得14~32(21.29±4.34)个月随访。Tight Rope组在切口长度、手术时间、术中出血量方面均优于Endobutton组,差异有统计学意义(P0.05)。Tight Rope组未见复位丢失,Endobutton组2例复位丢失,但2组差异无统计学意义(P>0.05)。结论双尾Tight Rope系统治疗Rockwood Ⅲ型肩锁关节脱位对于缩短手术时间、减小手术创伤、简化手术步骤具有较好的临床应用价值。 展开更多
关键词 Rockwood Ⅲ型肩锁关节脱位 Tight Rope系统 Endobutton系统 喙锁韧带重建术
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Aeroelastic Properties and Nonlinear Vibration Control of a Simply-Supported Lattice Sandwich Beam Embedded with Nitinol-Steel Wire Ropes 认领 引用 被引量：3
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作者 Yewei Zhang Xichao Chen +1 位作者 Donghui Li Jian Zang 《Acta Mechanica Solida Sinica》 SCIE EI CSCD 2022年第5期755-764,共10页
As a novel vibration absorber,Nitinol-steel wire rope(NiTi-ST)has rarely been studied on vibration suppression for lattice sandwich beams in supersonic airflow.In this paper,NiTi-ST with nonlinear stiffness and hyster... As a novel vibration absorber,Nitinol-steel wire rope(NiTi-ST)has rarely been studied on vibration suppression for lattice sandwich beams in supersonic airflow.In this paper,NiTi-ST with nonlinear stiffness and hysteretic damping is embedded in a lattice sandwich beam to control the beam's vibration.The nonlinear restoring and hysteretic damping force of NiTi-ST are treated as polynomials.The dynamic equation is established based on Hamilton's principle.The amplitude responses of the beam with different NiTi-ST configurations are calculated.The vibration-suppression effects and energy dissipation of lattice sandwich beam with different NiTi-ST configurations under different air velocities are also compared.The frequency-domain and time-domain methods are used to analyze the structural aeroelastic properties.Simulation results show that the use of NiTi-ST can significantly suppress excessive vibration of a lattice sandwich beam in supersonic airflow. 展开更多
关键词 Lattice sandwich beam Nonlinear vibration control Nitinol-steel wire rope Supersonic airflow
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关节镜下单束六股自体腘绳肌腱联合TightRope钢板解剖重建前交叉韧带的近期疗效 认领 引用 被引量：4
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作者 谭红略 代朋乙 袁延浩 《中国修复重建外科杂志》 CAS CSCD 北大核心 2016年第6期695-699,共5页
目的探讨关节镜下单束6股自体腘绳肌腱联合Tight Rope钢板解剖重建前交叉韧带(anterior cruciate ligament,ACL)的疗效。方法 2014年9月-2015年8月,收治24例ACL断裂患者,采用关节镜下单束6股自体腘绳肌腱通过Tight Rope钢板固定进行重... 目的探讨关节镜下单束6股自体腘绳肌腱联合Tight Rope钢板解剖重建前交叉韧带(anterior cruciate ligament,ACL)的疗效。方法 2014年9月-2015年8月,收治24例ACL断裂患者,采用关节镜下单束6股自体腘绳肌腱通过Tight Rope钢板固定进行重建。男16例,女8例;年龄18~54岁,平均36.2岁。致伤原因:运动伤15例,交通事故伤4例,扭伤5例。受伤至手术时间18 d^8个月,平均3.9个月。前抽屉试验、Lachman试验、轴移试验均为阳性。术前国际膝关节评分委员会(IKDC)评分为(38.69±3.85)分。Lysholm评分为(36.45±7.85)分。结果术后切口均Ⅰ期愈合,无感染、下肢深静脉血栓形成和血管、神经损伤等并发症发生。MRI显示重建韧带形态及位置满意。患者均获随访,随访时间6~16个月,平均12个月。末次随访时,Lysholm评分为(81.31±7.58)分,IKDC评分为(79.62±5.39)分,均较术前显著提高(P<0.05)。前抽屉试验阴性17例、Ⅰ度阳性7例,Lachman试验阴性20例、Ⅰ度阳性4例,轴移试验阴性21例、Ⅰ度阳性3例,与术前比较差异均有统计学意义(P<0.05)。结论关节镜下单束6股自体腘绳肌腱联合Tight Rope钢板解剖重建ACL操作简便,近期疗效满意。 展开更多
关键词 关节镜 前交叉韧带 腘绳肌腱 TightRope钢板
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Key technique of a detection sensor for coal mine wire ropes 认领 引用 被引量：5
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作者 WANG Hong-yao XU Zhao +4 位作者 HUA Gang TIAN Jie ZHOU Bing-bing LU Yan-hong CHEN Feng-jun 《Mining Science and Technology》 2009年第2期170-175,共6页
Wire ropes,employed extensively in coal mine hoists and transportation systems are subject to damage due to wear,corrosion and fatigue.The extent of damage and the carrying capacity of ropes are closely related to the... Wire ropes,employed extensively in coal mine hoists and transportation systems are subject to damage due to wear,corrosion and fatigue.The extent of damage and the carrying capacity of ropes are closely related to the sense of safety by staff and equipments.Magnetic flux leakage detection method(MFL),as an effective method,is these days widely used in detection of broken strands of wire ropes.In order to improve the accuracy of detection of flaws in wire ropes by magnetic flux leakage(MFL),the effect of the distance between a sensor and the surface of a wire rope(i.e.,lift-off) on detection by magnetic flux leakage was in-vestigated.An analysis of the main principles for the choice of lift-off is described by us and a new method that improves the structure of the detector is proposed from the point of view of the design of a magnetic circuit,to restrain the impact of fluctuations of sensor lift-off.The effect of this kind of method is validated by simulation and computation.The results show that the detection sensitivity is markedly increased by this method.Furthermore,the signal-to-noise ratio(SNR) can be increased by over 28%.This method will lend itself to offer reliable scientific information to optimize the structure of excitation devices and improve the accuracy of MFL detection. 展开更多
关键词 coal mine wire rope magnetic flux leakage detection lift-off
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ISAR MOTION COMPENSATION USING ROPE 认领 引用 被引量：6
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作者 汪玲 朱兆达 《Transactions of Nanjing University of Aeronautics and Astronautics》 2004年第1期64-68,共5页
Motion compensation is a key step for inverse synthetic aperture radar (ISAR) imaging. Many algorithms have been proposed. The rank one phase estimation (ROPE) algorithm is a good estimator for phase error widely used... Motion compensation is a key step for inverse synthetic aperture radar (ISAR) imaging. Many algorithms have been proposed. The rank one phase estimation (ROPE) algorithm is a good estimator for phase error widely used in SAR. The ROPE algorithm is used in ISAR phase compensation and the concrete implementation steps are presented. Subsequently, the performance of ROPE is analyzed. For ISAR data that fit the ROPE algorithm model, an excellent compensation effect can be obtained with high computation efficiency. Finally, ISAR real data are processed with ROPE and its imaging result is compared with that obtained by the modified Doppler centroid tracking (MDCT) method, which is a robust and good estimator in ISAR phase compensation. 展开更多
关键词 inverse synthetic aperture radar (ISAR) motion compensation phase compensation rank one phase estimation (ROPE)
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The finite element modeling of spiral ropes 认领 引用 被引量：7
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作者 Juan Wu 《International Journal of Coal Science & Technology》 CAS 2014年第3期346-355,共10页
Accurate understanding the behavior of spiral rope is complicated due to their complex geometry and complex contact conditions between the wires.This study proposed the finite element models of spiral ropes subjected ... Accurate understanding the behavior of spiral rope is complicated due to their complex geometry and complex contact conditions between the wires.This study proposed the finite element models of spiral ropes subjected to tensile loads.The parametric equations developed in this paper were implemented for geometric modeling of ropes.The 3D geometric models with different twisting manner,equal diameters of wires were generated in details by using Pro/ENGINEER software.The results of the present finite element analysis were on an acceptable level of accuracy as compared with those of theoretical and experimental data.Further development is ongoing to analysis the equivalent stresses induced by twisting manner of cables.The twisting manner of wires was important to spiral ropes in the three wire layers and the outer twisting manner of wires should be contrary to that of the second layer,no matter what is the first twisting manner of wires. 展开更多
关键词 Open spiral ropes Finite element method Tensile force
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Theoretical coupling longitudinal-transverse model and experimental verification of transverse vibration of rope for multi-rope friction hoisting system 认领 引用 被引量：4
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作者 Juan Wu Ziming Kou 《International Journal of Coal Science & Technology》 EI CAS 2016年第1期77-84,共8页
Using the mass of time-varying length balance rope focused on the hoisting conveyance, the coupling longi- tudinal-transverse model of mine friction hoist was established by using of the Hamilton＇s principle. The mod... Using the mass of time-varying length balance rope focused on the hoisting conveyance, the coupling longi- tudinal-transverse model of mine friction hoist was established by using of the Hamilton＇s principle. The modified Galerkin＇s method was used to discretize partial differential Eqs. The mine hoisting system was used to the example to analysis the relation between the load, velocity and transverse vibration of rope. The in situ tests were illustrated to evaluate the proposed mathematical model. The results showed that the modeling method can well represent the transverse vibration of rope. 展开更多
关键词 Hoisting system Vibration Rope Longitudinal-transverse Coupling
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