查询词典 absolute instability

The results show that the quintic nonlinearity plays a role similar to the case of neglecting the group-velocity mismatch in modifying the modulation instability, namely, the positive and negative quintic nonlinearities can still enhance and weaken the modulation instability, respectively.

结果表明，五阶非线性对调制不稳定性的影响与忽略群速度失配的情形是类似的，即正负五阶非线性分别能够增强和减弱调制不稳定性。

This text proceed with the theory of the vibration, utilize typical elastic hinge law analyze structure dynamics characteristic when the blade is quivered to instability, and then use relevant knowledge of blade vibration to simplify the model and the aerodynamic force of the vibration. Through the simplification, we can get the equation of the blade, which is dispersed to its instability. Then VISUAL BASIC procedure is utilized to work out thecharacteristic value of vibration and the vibration frequency. At last comparing the result which is calculated by the above-mentioned theory formulae with the result which is calculated by internationally agreed procedure ANSYS to verify the accuracy of the formula of reduction.

本文从振动理论入手，利用最为典型的弹性铰链法分析叶片发生颤振失稳时的结构动力学特性，然后对振动模型及振动时所受的气动力进行简化，利用简化方程得到叶片发生发散失稳时的振动方程，利用编制的VISUAL BASIC程序解出振动的特征值并得到振动频率，最后分别通过上述的理论公式和国际通用的有限元程序ANSYS对风力机叶片模型进行发散失稳时的频率计算，验证简化公式的准确性。

Foreign capital facilitate the saltant development of regional economy,however,the low efficiency and instability of foreign enterprises lead to the limitation and instability of independent innovation and upgrade of industrial structure in regions where foreign capital is principal part,and the potential of sustainable development in these regions is uncertain.

但由于外资企业投资上的低效率性和游移性，致使以外资为主体经济成分的地区自主创新和产业结构升级具有局限性、不稳定性，其可持续发展潜力与能力也具有不确定性。

The relationship between genetic instability and chromosome instability in Streptomyces has been well studied.

经多年深入研究，已逐步揭示了链霉菌遗传不稳定性和染色体不稳定性的关系。

The strong convective instability and the baroclinic instability in the low level provided the conditions of the torrential rain.

低层强对流不稳定和斜压不稳定为这次大暴雨的发生提供了条件。

2The spine fracture model is a type of instability spine model, it is satisfacted for the test. The new PETF can offer good three-dimensional stabilization to instability fracture spine.it has clinical feasibility . [3]To be a minimally-invasive surgical procedure ,the PETF assistanted microendoscopy can combine decompression and reduction with external fixation for the injuried vertebral colunm without segments fusion.

(1)骨折模型B组是不稳定性骨折模型，满足实验的要求，新型脊柱外固定器能为不稳定性骨折脊柱提供良好的三维稳定，具有临床可行性；(2)轴向压缩实验A组、C组和D组之间的差异均具有显著统计学意义，说明单纯新型脊柱外固定器是一种弹性固定，抗压刚度不够，但新型脊柱外固定器结合PVP术后抗压能力明显，但较正常标本仍有一定的差距，手术后短期内有必要适当腰部支柱保护；(3)新型脊柱外固定器联合MED和PVP术治疗胸腰椎骨折的微创技术能减轻病人的痛苦、达到胸腰椎骨折的治疗目的和效果，并具有非融合性固定的特点，具有较大的临床推广应用价值。

The achievements have been made such as the records revealed by climatic proxies,show the instability of the East Asian monsoon climates and warm phases; a short term warm event and a cold reversal before the termination of the penultimate; cold Henrich fingerprint in lake sediments of the Tibetan Plateau; the instability of oxygen isotope stage 5e and Holocene climates; the spatial variability of East Asian monsoon precipitation during the Younger Dryas and the increased variability of the recent centennial East Asian monsoon precipitation.

发现在倒数第二次冰期结束前一次持续时间非常短暂的气候温暖事件和寒冷回返事件，发现我国青藏高原湖相沉积物中保存了Henrich寒冷事件的烙印、氧同位素阶段5e和全新世的不稳定性，Yonger Dryas东亚季风降水的空间变率以及最近100年东亚季风降水变率增大等。

Although interspinous wiring remains the gold standard for most types of cervical instability, posterior plating also may provide superior fixation in cervical instability.

虽然脊椎椎突后钢丝固定法为广泛所接受用来处理颈椎不稳定的方法，然而在许多的研究报告中显示，后钢板固定术仍然还是优於后钢丝固定术。

Therefore,there exist not only the instability of transactions factors but also the instability of nontrading factors.

因此，它不仅存在交易因素的不稳定性，还有非交易因素的不稳定性。

While Japan contributes the least to export instability, and Japan can obviously smoothen other markets' fluctuation on export instability.

而日本对出口不稳定性的贡献最小，且日本明显能平抑其他市场的波动对出口不稳定性的影响。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。