失稳

In the demonstration of centrum rupture fracture and the centrum after skirt bone fragments, CT has the very high specificity and the sensitivity,in the diagnosis, divides, judgment jitter and the neurocanal narrow degree, CT has important diagnosis value.

CT在显示椎体爆裂型骨折及椎体后缘骨碎块上具有很高的特异性和敏感性，对诊断、分型、判断失稳及椎管狭窄程度上有重要的诊断价值。

Galerkin-finite strip method ; destabilization of flutter ; nonconservative forces

Galerkin－有限条法；颤振失稳；非保守力

Both of conventional continuous medium mechanics and noncontiguous medium mechanics, having strong pertinence, can abstract and simplify the rock model in research procedure, in which the rock body lying over the coal face can be considered as a static beam or board to leave out the push changes and the changes of property and load during the stability of overlying rock deformation has lost. Hence the derived profile equation is only the approximate expression of final subsidence of surface after the mining finished, and it is difficult to obtain the dynamic subsidence process of rock body.

传统的连续介质力学和非连续介质力学均具有针对性，在研究过程中将岩体模型抽象简化，将工作面上方的岩体看成是一静止的梁、板，省略了工作面的推进变化及覆岩在变形失稳时的性质和载荷的变化，得出的剖面方程仅是开采结束后地表的最终沉陷近似表达式，难以得到岩体的动态沉陷的过程。

We investigate detailedly the process of the c - type instability for nonparallel boundary layers with three - dimensional disturbances .

文中通过对三维物体的非平行边界层稳定性的研究，确定最不稳定波的扰动参数和最易失稳的流向、展向位置；对三维扰动的非平行非线性边界层稳定性的研究，得到更精确的扰动放大因子值。

The process of evolution, especially that of nonlinear evolution, of C-type instability of laminar-turbulent flow transition in nonparallel boundary layers are studied by means of a newly developed method called parabolic stability equations.

提出用抛物化稳定性方程新方法，研究非平行边界层从层流向湍流转捩的C型失稳的演化过程，特别是非线性演化问题。

One screw penetrated into the occipitoatlantal joint, and the other one slightly breached the ertebral artery grooe but did not injure ertebral artery. None of these 2 screws was associated with clinical sequelae. There were 2 patients who had postoperatie iatrogenic C2–C3 instability on dynamic radiograph, which did not need treatment.

一颗螺钉穿入寰枕关节，另一颗螺钉轻微突破椎动脉沟但是未损伤椎动脉。2颗螺钉均为带来临床后遗症。2个病人在动态影象学观察下出现术后医源性C2-3失稳，但不需要处理。

The present paper deals in detail with the origin, dynamics, geochemistry and physicochemistry of the ore-forming fluids, in combination with the origin of ore-forming matter, gold behaviour in the ore-forming fluids, equilibrium and unstability-precipitation in the course of migration on the basis of mineral composition and mineralization, alteration and ore-controlling factors of the representative gold deposits hosted in the Ailao Mountains ophiolitic melange belt, Yunnan.

笔者通过哀牢山蛇绿混杂岩带典型金矿床的物质组成、成矿规律、蚀变及控矿作用的研究，对哀牢山金矿带的成矿流体来源，成矿流体动力学、地球化学及物理化学性质进行了详细地讨论；对金矿的成矿物质来源，金在成矿流体中的存在形式，迁移过程中平衡、失稳-沉淀等进行了详细地分析和探讨。

Under the loads of upside soil and vehicles, those pipelines buried in soft soil are prone to produce longitudinal bending and overlarge deformation, these two influences will cause pipelines to lose stability and to produce breaks in the weakest parts, which will lead to leakage and even blowout. These accidents will influence normal operation of national economy and peoples daily lives, and bring serious economic and social damages.

埋在软土地基中的管道，受上部覆土荷载及车辆荷载的作用，容易产生纵向弯曲以及过大的变形，致使管道失稳，在最薄弱处产生破裂而导致渗漏甚至爆管事故，影响国民经济和日常生活的正常进行，会带来严重的经济和社会损失。

Through the investigation of three frame specimens with "π"pattern,this paper proves that the instable passibility of the frame column supporting wall would exist on condition that the design code requirements are satisfied, and presents a method used to analyze the elastoplastic stability.

通过对三榀&π&型试件的试验研究，确认RC底层大空间剪力培结构中，框支柱在满足设计规范要求的情况下，仍存在失稳破坏的可能性，并提出了弹塑性稳定性分析方法。

To investigate the dynamic stability of a two-degree-of-freedom manipulator as a system,differential equations of motion for this system were established on the basis of the Lagrange equation,and perturbed differential equations with period coefficients were derived for the period motion of this system by applying the perturbance theory.

为了研究两自由度机械手系统的动力学稳定性，基于拉格朗日方程给出了它的运动微分方程，并用扰动理论确定系统周期运动具有周期系数的扰动微分方程；根据F loquet理论对该系统扰动微分方程的平衡点的稳定性进行了分析，并用数值方法研究了平衡点失稳后的倍周期分岔过程。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。