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From the simulations, we can see the distributions and transmission of strain and stress in model under different loadings, and the results explained the fractures very well. 4. Similarly, a axis FEM model was constructed to simulate the axis fracture, emphasized on the odontoid process. Three kind of odontoid process fracture were analysed on this model, which occurred respectively on the tip, the middle and the fundus. The results gave the best angle to fracture the odontoid process of the axis.

四、建立了枢椎的三维有限元模型,对枢椎齿状突骨折机理进行了理论上的研究,重点针对临床上齿突骨折的三种分类:1、齿突尖骨折;2、齿突腰部骨折;3、齿突基底部骨折,赋予齿状突在状面沿各种角度下受力条件,模拟衰椎前弓、襄椎横韧带以及CZ-3棘间韧带对枢椎造成的暴力破坏,确定了最可能引起齿状突暴力骨折的受力角度。

Similarly, a axis FEM model was constructed to simulate the axis fracture, emphasized on the odontoid process. Three kind of odontoid process fracture were analysed on this model, which occurred respectively on the tip, the middle and the fundus. The results gave the best angle to fracture the odontoid process of the axis.

四、建立了枢椎的三维有限元模型,对枢椎齿状突骨折机理进行了理论上的研究,重点针对临床上齿突骨折的三种分类:1、齿突尖骨折:2、齿突腰部骨折:3、齿突基底部骨折,赋予齿状突在状面沿各种角度下受力条件,模拟寰椎前弓、寰椎横韧带以及C2-3棘间韧带对枢椎造成的暴力破坏,确定了最可能引起齿状突暴力骨折的受力角度。

Results: Scans of 3D-FIESTA sequence combined with post-procession could precisely show labyrinth, nerves and vessels in inner ear and internal auditory canal, as well as the relationship between nerves and vessels around. As to the ability to evaluate nerves in IAC, MPR and VE was superior to MIP; As to the ability to display semicircularesin and cochlea, MIP was the same as double oblique MPR; It was important for VE and oblique sagittal MPR to display the position of foramina nervosa of IAC.

结果:3D-FIESTA序列扫描结合MPR、MIP和VE重组对内耳迷路及内听道内神经及血管显示清晰,能够清晰显示两者之间的关系,MPR和VE重组对神经的显示优于MIP重组,MIP对半规管显示与双斜面MPR并无明显差别,VE和斜状面对于内听道内各神经孔的位置关系具有重要意义。

While surfaced, the Wagner utilizes a Heavy Electron Bolter. When submerged, the Wagner reconfigures its Bolter to fire torpedoes.

当在水面或地面上时,瓦格纳使用重型电子攻击,当下潜的时候,瓦格纳则将其替换成鱼雷。

Methods:The depth of the anterior and posterior rims of foramen magnum and the angle between medulla oblongata and upper spinal cord on midsagittal SE or FSE T1WI were measured in 320normal Chinese individuals and in 36patients with basilar impression.

随机选取320例没有颅颈交界区相关的临床症状及体症,MRI扫描无明显颅骨破坏性病变和颅颈交界区畸形的正常国人和36例颅底凹陷症患者的颅脑MRI图像,于正中状面SE或FSE T_1WI图像上测量枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值。正常人按性别、年龄分16组,每组20例。

Purpose:To determine the normal ranges of the depth of the anterior and posterior rims of foramen occipital magnum and the angle between medulla oblongata and the upper spinal cord on midsagittal MRI in normal Chinese idividuals and patients with basilar impression,to study their clinical significance and to provide normal reference in diagnosing basilar invagination by MRI.

目的:利用颅脑正中状面MRI自旋回波或快速自旋回波T_1WI图像测量颅颈交界区正常的中国人和颅底凹陷症患者枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值,评价其正常值范围,探讨其发育规律及临床意义,为MRI诊断颅底凹陷症提供直接的参考标准。

In this paper the author mainly studies the bows and arr ows of GaoGouli, and presents some personal opinion on deriv ed culture meaning.

本论文以高句丽&弓&为主要研究对象,对其派生出来的&文化内涵&阐明笔者个人的见解。

METHODS: After anaesthetized, rabbits were cut at the skin for 2 cm long at the crossing of skull center and posterior canthus, skull was exposed and periosteum was separated, then a round skull window with diameter of 0.5 cm was drilled at 0.5 cm left or to sagittal suture and 0.5 cm posterior to coronal suture, after that, 35 g/L rose Bengal was slowly injected from ear-edge vein in dosage of 1 mL/kg by once.

兔麻醉后,沿颅骨的中央与眼后角垂直交叉处纵行切开皮肤约2 cm,暴露颅骨,刮离骨膜,在状缝左侧外0.5 cm与冠状缝后0.5 cm处,用钻头直径0.5 cm的颅钻钻透颅骨,造成颅骨圆形洞窗,随即由耳缘静脉按1 mL/kg一次性缓慢注入35g/L四氯四碘荧光素钠盐。约3 min后用冷光源(波长540 nm,功率140 lx)对准颅骨洞窗,连续照射8 min后,缝合皮肤切口。

Methods: Techniques of three dimension cursor based on volume multi-orientation sections were used to identify and localize precisely the cerebral central sulcus on the continuous coronal and sagittal MRI by using a person computer.

应用个人计算机设备,采用计算机辅助的三维定标法,对大脑冠状位、状位MRI上中央进行了识别、定位,并与连续追踪法结果比较。

To get properly oriented, view the MPEG movie ("cine" button, next to the sagittal image) of the entire dataset, and find the central sulcus by first locating the marginal sulcus in the medial parietal lobe.

要正确定位中央沟,可以观看全部数据的MPEG影像点击状面影像旁的&cine&),并首先确定位于顶叶中部的边缘沟的位置。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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