查询词典 absolute instability

It has been well documented that the fibular collateral ligament is the primary varus stabilizer of the knee.8,10 Consequently, isolated FCL injuries can elicit abnormal varus knee instability that can lead to functional limitations, a varus thrust gait pattern, and the potential development of medial meniscal tears or medial compartment arthritis over time due to the increased compressive forces at the medial tibiofemoral compartment.16,23,30 In addition, it has been demonstrated that varus instability, primarily due to a deficient FCL from an untreated posterolateral knee injury, causes a significant increase in force on both anterior cruciate and posterior cruciate ligament reconstruction grafts.11,21,22 Therefore, a reconstruction technique to address nonrepairable acute or chronic isolated FCL tears is important to address these pathologic abnormalities.

已经证实腓侧副韧带是防止膝关节内翻的主要稳定结构[8，10]。因此，FCL离断伤可以引起异常的膝关节内翻不稳定，从而导致功能受限、膝内摆步态和潜在发展为内侧半月板撕裂或由于在增加胫股关节间隙的压力会随时间推移发生内侧间室关节炎[16， 23， 30]。此外，已经证实了主要由膝关节后外侧损伤后未经治疗导致FCL功能缺陷引起的膝内翻不稳可以引起前交叉韧带和后交叉韧带重建移植物受力明显[11，21，22]。因此，认为不可修复的急性或慢性FCL离断撕裂伤的重建技术对这些病理异常非常重要。

No doubt the socialisation of most financial intermediation would be costly as regards dynamism and innovation, but if the risk of instability is too great and the cost of instability too high, then that may be a cost worth paying.

有一个存在已久的主张认为，接受存款的私有银行机构根本没有理由存在，因为若没有存款担保和/或由纳税人买单的最后贷款设施的话，这些机构就无法安全存在。

No doubt the socialisation of most financial intermediation would be costly as regards dynamism and innovation, but if the risk of instability is too great and the cost of instability too high, then that may be a cost worth paying.

有关金融中介不能委托于私营部门的主张，现在可扩展到基于资本市场的、交易导向型的金融资本主义新形式了。

Numerical simulations are conduced for the deformation, instability and failure of aluminum honeycombs with different relative density. The meso-mechanisms of instability and failure are analyzed.

数值模拟了不同相对密度范围的铝蜂窝结构的变形、失稳和破坏现象，分析了结构失稳和破坏的细观力学机制。

The real tangential velocity fluctuation indicated that there existed an instability of swirling flow in the cyclone.This instability resulted in the rotation center of the swirling flow deviating from the geometric center of the cyclone,which produced the quasi-periodic oscillation of swirling flow and gave the real tangential velocity fluctuation.

瞬时切向速度的变化反映了旋风分离器内旋转流的不稳定性，这种不稳定性导致了旋风分离器内旋转流的旋转中心与几何中心不重合，旋转中心围绕着几何中心摆动，由此造成了瞬时切向速度随时间的类周期的波动变化。

By analyzing surrounding rock instability caused by tunnel excavation, surrounding rock instability of deep-buried tunnels is considered as a sudden failure phenomenon, which possesses nonlinearity and discontinuity obviously and shows the uncertainty of mechanical deformation property, nonlinearity of constitutive relationship and catastrophe of failure process.

在分析隧道开挖引起围岩失稳基础上，认为深埋隧道围岩的失稳是一种突发破坏现象，具有明显的非线性和不连续性质，主要表现在力学变形性质的不确定性、本构关系的非线性和破坏过程中的突变性。

The following exciting results are derived: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer, Unified Power Flow Controller and Static Var Compensator as well as using real parameter values of power systems in simulation , the SNB surface and the HB surface on the boundary of small signal stability region will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability, so that a power system with mass shunt compensators is easily subjected to the oscillatory instability.

同时发现：1 系统中的慢速励磁，在某些情况下会与并联补偿电容器组产生负阻尼现象而显著降低系统的动态性能，大大增加系统出现振荡失稳的可能性；2 在采用较多并联电容器组补偿的电力系统中，更容易出现振荡型失稳。

The following exciting results are revealed: 1 When considering the influence of some nonlinear elements such as hard-limit of exciters, the effects of some devices such as Power System Stabilizer and Static Var Compensator which can introduce positive damping in power system, the reasonability of system parameter values in simulation, the SNB surface and HB surface on the boundary of SSSR will turn close to each other and even coalesce together; 2 Under some conditions, coupling between slow exciters and shunt capacitors will bring negative damping in power system dynamics, which increases the possibility of oscillatory instability. So the power system with mass shunt compensators is easily subjected to the oscillatory instability. In recent years, chaotic phenomena of power system have been reported many times. Some simulation studies even found chaos existing inside the power system SSSR. In this dissertation, chaotic phenomena in power systems are thoroughly studied in order to make clear the relation of chaos and SSSR. The following results are derived: 1 Based on Li-Yorke Theorem and their definition on the chaos, the existence of chaos in power system is verified; 2 Three possible routes of causing chaos in power system are found and deeply investigated. They are route of cascading period doubling, route of directly initial energizing and route of torus bifurcation (or quasi-periodicity). The latter two routes are investigated for the first time in power system stability studies; 3 When the stability conditions of chaos are broken, it is found they can lead to voltage collapse, angle divergence, or voltage collapse with angle divergence simultaneously.

针对在电力系统小扰动稳定区域内可能存在混沌吸引域的有关报道，本文深入研究了电力系统混沌现象的出现途径和与系统失稳模式之间的关系：1利用Li-Yorke定理和Li-Yorke的混沌定义，从理论上证明了电力系统混沌现象的存在性；2发现了电力系统中导致混沌出现的三种可能途径：倍周期分岔导致混沌、初始能量直接激发混沌和经由环面分岔导致混沌，并对后两种新发现的途径进行了较为细致的研究；3发现了混沌极限环破裂导致电压崩溃、角度失稳以及电压崩溃和角度失稳同时出现的现象，其中混沌极限环破裂导致系统角度失稳和电压崩溃及角度失稳同时出现的现象均属首次报道；4证明由微分-代数方程描述的系统模型，其小扰动稳定域的边界只包含HB、SNB和SIB三种分岔界面，在SSSR的内部和边界上，均不可能存在会导致混沌的点，从而将混沌现象排除在小扰动稳定域的研究之外，简化了后者的研究工作。

In fact, the process of fuel breakup and atomization is a kind of instability phenomenon of the liquid jet. In order to increasing the oil surface area and promoting efficient combustion, the instability process of the jet is always used to make the fuel atomization in engineering.

燃油的分裂与雾化过程实际上是液体射流的一种失稳现象，在工程上常常利用射流的这种失稳过程来实现燃油的雾化，以增加燃油的表面积提高燃烧效率。

A cusp catastrophe model is presented to describe the behavior of sliding along one deep incompetent structural plane of a gravity dam foundation, and the sufficient conditions leading to instability are discussed. It is found that the instability of sliding relies mainly on the stiffness ratio k, the homogeneity index of the medium m and the geometry-mechanic parameter ξ and that the reliability of the traditional limit analysis method is deficient.

通过建立的模型分析，发现坝基滑动失稳主要取决于软弱面上复杂弹脆性介质和应变软化介质在应变软化拐点处的刚度比k、材料的均匀性指标m及几何－力学参数ξ；并给出了发生突变失稳的充分力学判据，指出传统的刚体极限平衡分析法存在一定的缺陷。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。