稳定性

The practically oriented treatment of dynamic structural buckling is undoubtely be hampered by two problems, how to adopte a existed criterion or advance a new criterion of dynamic stability in general sense, and how to develope a simple and appealing algebraic representation in terms of singularity of the tangental stiffness matrix .

实际解决动力稳定问题的进程无疑受碍于怎样选用已有的或发展新的一般意义上的动力稳定性判定准则，以及怎样发展简洁的富有吸引力的切线刚度矩阵奇异性的代数描述方法。

The paper is devoted to the quartic invariant algebraic curves in quadratic system.

本文在给定参数满足一定的条件下，研究了一类二次系统的四次不变代数曲线系统平衡点的稳定性态，并运用Dulac函数法给出了该系统不存在极限环的充分条件，这一研究在同类问题中具有一定的拓展性。

A theory and algorithm are presented for the power system steady state stability probabilistic analysis in this paper .

给出了多机系统静态稳定性概率分析的理论和方法。

Experiment results show that the algorithm is stable and effective.

实验结果表明改进的算法具有较高的稳定性和效率。

Mathematical models algorithmization can realize easily through choosing corresponding models and computer language.

在算法实现过程中，选择数值稳定性高、误差可以控制、计算工作量少和尽可能节省内存空间的算法。

Summary of Background Data. An addition of PSF to the stand-alone ALIF increases

背景资料概要：单独行标准ALIF术时增加PSF可以提高节段的稳定性。

OBJECTIVE: To compare the initial stability of lumbar spine following ALIF, PLIF or TLIF in combination with bilateral pedicle screw fixation.

目的：比较前路椎间融合术、后路椎间融合术、椎间孔入路椎间融合术加用双侧椎弓根螺钉内固定后腰椎即刻稳定性的差异。

The rigidity, stress, and strain of lumbar spine following PLIF were greater than ALIF, but torsion indexes were smaller than ALIF.

后路椎间融合术的刚度明显强于前路椎间融合术，应变和应力也较前路椎间融合术有优势，但是其扭转稳定性却不如前路椎间融合术。

To evaluate the biomechanical stability of lumbar intact specimen, anterior lumbar interbody fixation specimen, ALIF specimen fixed with pedicle screw and ALIF specimen fixed with translaminar facets screw.

目的］ 对腰椎完整标本、单纯腰椎前路椎间融合术、ALIF分别行椎弓根钉固定及经椎板关节突螺钉固定4种状态进行测试，比较生物力学稳定性。

The results showed that, the antibiotic was stable under the condition of high temperature and alkali, but not in acid solution.

结果表明，该菌产生的抗生素在中性和碱性条件下具有极高的热稳定性，但在酸性条件下不稳定。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。