查询词典 directed line segment

Through simulation of the real process of thomcolumbar burst fracture and use of modem dynamics techniques, the present study was (1) to investigate the kinetic relationship between structural damage and impact energy absorption and dynamics mechanism of thoracolumbar burst fracture by quantitative analysis of various injured segments;(2) to explore the instability mechanism of L1 vertebral burst fracture and its injury threshold by three-dimensional analysis of the injured segment with stereophotogrammetry in combination of transient physical parameters, anatomy and image;(3) to explore the corresponding relationships between impact energy, geometry parameters and biomechanics by geometry and biomechanical analysis of thoracolumbar burst fracture, which may provide an objective standard for evaluation of spinal injury severity and experimental evidence for adoption of biomechanical treatment in clinic;(4) to evaluate the fixation effect of different instruments and the effect of intervertebral bone graft on segment fixation by analysis of the threedimensional stability of different internal fixation instruments and their decompression of the spinal canal, which may provide experimental evidence for therapeutical selection for thoracolumbar burst fracture in future; and finally to investigate the effect of various instrument fixation on dynamical characteristics by comparison and quantitative analysis of frequency and amplitude responses, which may provide certain theories and experimental evidence for application of vibration test to judge the stability of the spine.

本研究从胸腰段脊柱爆裂骨折发生的实际过程出发，以现代动力学检测及计算机多通道高性能数据采集分析系统等高新技术为基础，实时量化分析损伤节段的工程参数，揭示了结构破坏与能量吸收的变化规律，探讨了胸腰段脊柱爆裂骨折的瞬态损伤机制；利用三维立体摄像技术，对不同损伤程度的节段进行三维运动分析，结合瞬态物理参数、影像学和病理解剖，明确了〓椎体爆裂骨折的失稳机制及损伤阈值；通过对胸腰椎爆裂骨折的几何学变化及生物力学分析，明确了撞击能量与几何参数、几何参数与生物力学的相应关系，为评判脊柱损伤程度提供了客观标准，为治疗中采取适宜的生物力学方法提供了实验依据；通过对比分析不同内固定器械的三维稳定性和对椎管的减压作用，评价不同器械的复位固定作用，同时比较椎体间植骨对节段固定作用的影响，为今后临床胸腰段脊柱爆裂骨折的治疗选择提供依据；利用振动测试与分析技术，比较及量化分析了不同致伤状况的频幅响应特征，比较分析了各种器械固定对动力学特性的影响，为今后临床建立基于振动测试与分析技术判断脊柱稳定性的诊断方法，提供了一定的理论和实验依据。

Methods: We operated on ten adult cadaver heads(20 sides)fixed in 10% formalin by mimicking the approach combined transmastoid and middle cranial fossa under surgical microscope,exposed the facial nerve from cerebellopontine angle segment to stylomastoid foramen, the different segment and anatomic landmarks of facial nerve and its surroundings were observed and measured.

对 10 列(20 侧)10%福尔马林固定的成人头颅湿标本模拟经乳突联合颅中窝径路暴露面神经从桥延沟到茎乳孔全程，对面神经各段及其毗邻结构进行观测。

The tremie is connected with special bayonet fittings, with the inner diameter of 25cm and segment length of 3m except for the bottom segment 6m.

导管采用专用的卡口式导管，导管内径25cm，分节长3m，最下节长6m。

Methods: 7 calf lumbar spine specimens (T13~S2) were biomechanically tested under pure moment of 10Nm loading with Tenor pedicle screw system as the fixation device. Range of motion and intradiscal pressure were measured in all unfused segments and compared among the control group, the single-segment-fixed group (L45) and the double-segment-fixed group (L3~L5), and the correlation analysis and comparison between the increments of kinematic index and intradiscal pressure were performed.

取7具小牛腰段脊柱标本(T13~S2)，以Tenor椎弓根螺钉系统作为固定器械，在10Nm纯力矩加载下进行生物力学测定，测定各活动节段的运动范围和椎间盘内压，比较完整对照组、L45单间隙固定组和L3~L5双间隙固定组间上述指标的变化，并对运动学指标和椎间盘内压增量进行相关分析和比较。

Methods Seven calf lumar spine specimens(T13~S2) were biomechanically tested under pure moment of 10Nm loading with Tenor pedicle screw system as the fixation device. Range of motion and intradiscal pressure were measured in all unfused segments and compared among the control group, the single-segment-fixed group (L4/5) and the double-segment-fixed group (L3~L5), and the correlation analysis was performed.

取7具小牛腰段脊柱标本(T13-S2)，以Tenor椎弓根螺钉系统作为固定器械，在10Nm纯力矩加载下进行生物力学测定，测定各活动节段的运动范围和间盘内压，比较完整对照组、L4／5单节段固定组和L3～L5双节段固定组间上述指标的变化，并进行相关分析。

2DRG co-cultured with sciatic nerve undergoing Wallerian degeneration for 14days in vivo in serum free DMEM/F12,1sciatic nerve segment was added into co-culture system at the first moment,the axons were strong and straight and could adhered to each other,and the number of axons dramatically reduced compared with that of DRG cultured alone in serum free medium.2DRG cultured in serum free DMEM/F12for 4days,then the sciatic nerve segment was added into the culture system for 3days,the axons became straight and part of them adhered to each other.

分别在无血清和有血清的条件下将新生鼠的背根神经节和体内变性14天的大鼠坐骨神经段进行联合培养作为实验组，并以在相应条件下单独培养的DRG的轴突的生长情况作为对照组来观察比较轴突的生长情况。

These descriptors initialise our code segment, data and stack segments and the video segment in order to access the video memory.

这些描述符初始化我们的代码段，数据段和堆栈段，还有用来处理显存的显示段。

Because the lengths in femurs are quite different in different patients,besides noises,the upper segment and lower segment of the femur influence the design of t...

但是在术前模型中由于获得的股骨段的长度不一样，除受噪声点干扰外，股骨本身的上段切片以及下段髁部切片对基轴线的确定也有很大的影响。

This work designs a stream-based mail proxy which processes the mail segment by segment without the storage of the entire mail and interleaves the MIME parsing, decoding, decompression and virus scanning.

我们实作了一个以串流为基础的邮件代理伺服器，它以交错执行分析MIME、解码、解压缩、扫毒等步骤达到部分地处理邮件而不是先将整封存起来。

Results:The main radiological manifestations of the interface of peripheral cancerized gastric ulcer are: Small segment with prominent, regular margin, clubbed plica, slim plicae reaching the margin of the niche or margin of the small segment of are prominent. The radiological presentations of gastric cancerized ulcers are mainly tortuous large plicea and slim striped plicae, and the pathologic changes under microscope are mainly chronic superficial gastritis.

结果：胃溃疡癌变溃疡病灶与周围交界面主要X线表现为小段弧形隆起，边缘较规则，杵状皱襞、纤细皱襞可达溃疡龛影的边缘或小段弧形隆起的边缘；溃疡旁X线表现以迂曲粗大皱襞及纤细条纹状皱襞为主，病理镜下改变是以慢性浅表性胃炎为主。

Anna: No, I've got a hangover.

不是，我昨晚宿醉了。

We head into the mountains in Su's new Land Cruiser, stop for lunch at a scenic restaurant and then hang around drinking beer and eating fruit as two of his employees attempt to lure the birds with a tape recording of the fowl's mating call.

我们坐上苏的巡逻车向山顶出发，在一家风景优美的餐馆吃了中饭。然后我们喝着啤酒吃着水果四处逛。