研究表明不论是准单色还是多色的部分相干空间光孤子在传输过程中都不是严格稳定的，并且多色光孤子的稳定性受到频率的影响。
The study shows that both kinds of solitons are all unstable, and we find the stability of polychromatic partially coherent optical spatial solitons is affected by light frequency.
目的研究声强和频率对发声稳定性的影响。
Objective To investigate the effects of sound intensity and frequency on phonatory stability.
本文建立了在纵浪上航行船舶的非线性参数激励横摇运动方程，研究了当升沉固有频率接近横摇固有频率时船舶的稳定性。
A nonlinear parametric excitation equation is obtained for ships in longitudinal waves, and the dynamic stability is analyzed when the natural frequency of heave and roll are approximately equal.
从器件的频率和阻尼特性出发，研究了器件的机械特性对热振动噪声和机械稳定性能的影响。
Based on the study of frequency and damping, the effects of mechanical characteristic on thermal vibration noise and m.
在ICPT系统的研究中，频率稳定性和耦合传输功率研究一直是重点和难点。
In the research of ICPT system, frequency stability and coupled transmission power is always important and difficult.
本项研究初步建立了一种转化频率高、稳定性好、通用性较强的甜菜遗传转化技术体系，从而通过植物转基因技术为选育高产、优质、广谱抗病的甜菜品种奠定基础。
A stable and efficient Agrobacterium mediated transformation system has been established which offers a base for high yield, high quality and broad resistance of disease Sugarbeet variety.
本项研究初步建立了一种转化频率高、稳定性好、通用性较强的甜菜遗传转化技术体系，从而通过植物转基因技术为选育高产、优质、广谱抗病的甜菜品种奠定基础。
A stable and efficient Agrobacterium mediated transformation system has been established which offers a base for high yield, high quality and broad resistance of disease Sugarbeet variety.
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