Transforaminal lumbar interbody fusion for traumatic lumbar spondylolisthesis

To evaluate the clinical outcome, effectiveness and safety of the surgical management of traumatic lumbar spondylolisthesis with transforaminal lumbar interbody fusion (TLIF) with short segmental instrumentation fixation. A retrospective review of a consecutive series of 24 patients with traumatic lumbar spondylolisthesis treated with TLIF procedure was carried out. Intraoperative spinal cord monitoring was used to confirm the peripheral neural function intact during the reduction of the spondylolisthesis. Preoperative clinical and radiographic evaluation of all cases were originally collected prospectively. Data regarding blood loss, operative time, duration of hospital stay, radiographic fusion, instrumentation failure and clinical result were collected and observed at regular follow-up periods. All patients were engaged in high-energy accidents in the lower back and 16 patients had concomitant injuries. The mean operative time was 124 min, mean blood loss was 350 mL, and mean hospital stay was 6.5 days. There were no complications such as incision infection, cerebrospinal fluide (CSF) leakage and nerve root injury and so on. All patients demonstrated a solid lumbar interbody fusion within 4 months, and no evidence of spondylolisthesis correction loss, instrumentation failure and loosing. They all were completely asymptomatic, with normal neurologic findings, and had resumed their previous level of physical activities on the final follow-up. Meticulous clinical examination and careful imaging assessment could assist an early diagonosis in cases of traumatic lumbar spondylolisthesis. Performing open reduction and the TLIF procedure as soon as possible could restore segmental stability and painless function. The TLIF procedure was a safe, effective technique to treat traumatic lumbar spondylolisthesis.     

基于灰度积分投影的安全带佩戴识别方法

为进一步提高安全带佩戴率,针对目前安全带佩戴提示系统存在的不足,提出了一种基于灰度积分投影的安全带佩带识别方法.该方法在对采集到的乘员图像进行预处理得到灰度分配较为均匀图像的基础上,采用全局阚值分割法对图像进行阈值分割得到二值化图,再对二值化图像分别进行垂直和水平灰度积分投影,结合安全带几何特征的先验知识,得到安全带特征点的位置坐标,从而达到安全带佩戴识别的目的.实验结果表明,该方法能有效识别乘员安全带佩戴状况,具有较高的适用性和准确性.     

用PCR-SSCP方法研究子宫颈癌组织中人乳头瘤病毒E_7基因的变异

运用核酸杂交和聚合酶链式反应（ＰＣＲ）对临床确诊的６１份子宫颈癌Ⅱ～Ⅲ期标本进行了人乳头瘤病毒（ＨＰＶ）１６型Ｅ７基因的检测。非同位素地高辛标记探针斑点杂交阳性检出率为４５．９％，ＰＣＲ检测阳性率为５４．１％，两种检测结果证实ＨＰＶ－１６型感染与子宫颈癌的发生密切相关。进一步用灵敏的单链构象多态性分析法（ＳＳＣＰ）对３３例阳性标本进行分析，发现有２７例单链ＤＮＡ迁移率与正常对照有不同，推测均发生了ＤＮＡ序列的改变，提示ＨＰＶ－１６Ｅ７基因的变异在子宫颈癌组织中是较常见的现象，其与子宫颈癌的发生有一定的关系。     

施工企业成本控制分析

成本管理和控制是企业生存和发展的基础与核心，贯穿于工程项目实施全过程。此文从成本控制的内容出发，通过成本测算和预算、材料价格分析，得出成本控制策略与方法。成本控制策略与方法的确定涉及项目的进度、质量、安全、环保等诸多方面，需分部分项予以统筹考虑。     

定子电压定向矢量控制系统在泵站电动机上的研究

采用定子电压定向矢量控制策略在d-q坐标系中建立的数学模型,实现对双馈电机的转速和功率因数控制.并在泵站进行了实验运行.     

无缝线路锁定轨温衰减规律探讨

根据现场实测到的无缝线路锁定轨温衰减情况,找出钢轨上道后锁定轨温的衰减量与通过总重之间的关系,合理地对无缝线路锁定轨温进行调整,加强对无缝线路的管理,保持轨道结构稳定,确保行车安全。     

铁路信号基础知识 第七讲 列控系统的基本概念

介绍列控系统的定义和两大基本要素,列车运行控制模式决定了采用的闭塞方式,从而决定了系统的效能;车地信息传输系统决定了系统的构成和技术水平。     

基于GTM的沥青混合料配合比设计与施工控制

沥青路面的车辙、水损害等早期病害是公路建设中困扰多年的问题,而应用GTM设计的沥青混凝土是解决沥青路面早期病害的有效方法。结合施工实践,介绍GTM设计原理、方法和质量控制要点,为此类工程的施工控制积累一些经验。     

小阻力扣件有荷阻力取值分析

进行有荷载情况下的扣件阻力试验可验证和完善桥上无缝线路扣件纵向阻力取值计算理论。试验表明,有载情况下小阻力扣件的弹性位移值、纵向阻力值均与《送审稿》取值不符;在各级垂向荷载情况下,小阻力扣件的摩阻系数可偏安全取0.20,纵向阻力可采用垂向荷载值与摩阻系数的乘积而得。     

科技引领生态景观大道建设 创新打造未来城市名片

介绍了天津市滨海新区天津大道"绿色、生态、景观、环保、节能、和谐"的设计主题。从该工程的规划、设计,路基处理,路面材料,边沟设置,景观设计等方面阐述了工程的创新思想,并介绍了该工程绿色生态型城市快速路集成技术、城市快速路生态化设计技术集成、天津滨海新区城市快速路软土地基处理等科研课题的内容。