胶粘接法在靖西天然气管线带压堵漏中的应用

靖西管线的实践表明,利用胶结密封技术进行天然气微量泄露的带压堵漏工作,具有经济、快捷、便利等特点,有一定的实用价值。介绍了螺丝、铅丝和导流三种粘接堵漏法的具体工序及作业中应注意的问题。

脊柱损伤患者经椎弓根螺丝固定治疗的临床效果

目的通过对不同组实施不同的手术方案,观察两组临床效果,探讨椎弓根螺丝固定治疗脊柱损伤的优缺点。方法从到该院诊治的2015年1月—2018年7月骨科脊柱患者中随机抽取52例患者,分组时采用随机数字法,比较两种方法的临床效果。结果治疗后治疗组Cobb角为(5.98±1.33)°小于对照组(t=2.882,P<0.05)、伤锥前缘高度压迫率(6.13±1.36)%小于对照组(t=3.528,P<0.05)、VAS评分为(2.89±0.23)分小于对照组(t=3.283,P<0.05);治疗组并发症的发生率为为19.23%低于对照组(χ~2=18.427,P<0.05),螺丝钉松动率为3.85%低于对照组(χ~2=16.325,P<0.05);治疗组住院时间为(7.98±1.99)d低于对照组(t=8.116,P<0.05)、手术出血量为(36.78±5.73)mL低于对照组(t=11.101,P<0.05)和手术时间为(54.15±3.92)min低于对照组(t=5.082,P<0.05)。结论椎弓根螺丝固定法可有效提高临床疗效,减少术后并发症的发生,减少住院、手术时间和手术出血量,是一项值得推广的治疗脊柱损伤的手术方法。

Positioning of Screw Holes Group Based on Digital Camera and Digital Control Drilling

Positioning of screw holes is an important production procedure for steel construction connecting with bolts. In this paper, a new production method is presented, in which the digital camera is used for taking pictures of screw holes and other techniques are advanced. This paper also indicates that the pixels of CCD chip in photogrammetry should be chosen as all geometric units in an image, such as interior elements and all kinds of distortions. The measure can also simplify the camera calibration for determining the size of non-square pixel.