It follows that the latter imposes a crucial constraint on the former , thus leading to the fact that when the amplitude is bigger compared to another critical value , generalized nonlinear subcritical symmetric instability may occur 由此可见，后一条件对前一条件附加了一个很强的约束，当初始扰动振幅大于另一临界值时，容易出现非线性亚临界对称不稳定。
The numerical experiments show that when nondimension parameter 0 . 35 < 0 . 65 , the phenomenon of subcritical instability can exist in two - layer baroclinic atmosphere . the occurrence of subcritical instability is relative to the latitudinal gradient of coriolis parameter 试验结果表明：当无量纲量0 . 35 0 . 65时，斜压两层大气中可能发生亚临界不稳定现象。
( 3 ) the methods of detecting sub - critical propagation of cracks in concrete dams are explored by use of grey system theory , motion stability theory and catastrophe theory , and three criteria for sub - critical crack propagation are given ( 3 )采用灰色系统理论、运动稳定性理论和突变理论，研究了混凝土坝裂缝亚临界扩展识别方法，给出了三个裂缝亚临界扩展判据。
The boiler for phase l projecf is of subcritical parameter intermediate reheat single combustion chamber double u flame balance draft dry bot - tom furnace and controlled circulation , which adopt the technique of stein com - pany of france , and is produced by b w company of spain 电厂锅炉采用法国stein公司技术，西班牙b w公司生产的w型火焰亚临界中间再热控制循环汽包炉。
4 . having experiment of the rainfall from 12ut of 4th to 12ut 5th jul in 2003 with the mesoscale model mm5v3 , the result shows that ( 1 ) the nonlinear subcritical symmetric instability is probably one of the main mechanism of this rainfall 利用mm5v3中尺度模式作2003年7月4日20时至5日20时这场暴雨的数值试验，结果表明： ( 1 )非线性亚临界对称不稳定可能是这场暴雨形成的重要机制之一。
Abstract : the authers has studied the phase cha racteristics and phase equilibri um of sda ( solvent - deasphalting ) of dagang residue - ic4 and dagang residue m ixed w ith some ccdo ( catalytic cracking decant oil ) - ic4 system under subcritical condit ions systematically 文摘:系统地研究了大港渣油-异丁烷体系及混有催化裂化澄清油的大港渣油-异丁烷体系在亚临界条件下，溶剂脱沥青过程的相特性及相平衡。
Turbine is of reactionary single shaft three cylinders with double exhausts subcritical pa - rameter and intermediate reheat , which is the product of abb switzerland . the generator is of static excitation and hydrogen inner cooling type of hydro - gen cooling core with water cooling stator 汽轮发电机组为瑞士abb公司产品，亚临界中间再热三缸双排汽单轴冷凝反动式汽轮机发电机采用静态励磁水氢氢冷却方式。
And mm5v3 mesoscale model is used to similar from 00ut of 22th to 00ut of 23th july in 1998 . the results show that ( l ) the nonlinear subcritical symmetric instability often happens at 200hpa and 500hpa , which can make the atmosphere from linear symmetric stability to instability 用数值模式资料从更小的时间尺度上对非线性亚临界对称不稳定理论进行研究，结果表明： ( 1 )非线性亚临界对称不稳定主要发生在高层200hpa ，中层500hpa也有发生。
This paper had developed a series of mathematical models and algorithm , which can be used for developing the real - time module for any performance boiler training simulator , by researching the 1006t / h sub - critical boiler ( including powder manufacturing apparatus ) of luohuang power plant 本文针对珞璜电厂1006t / h亚临界锅炉系统(包括制粉系统)进行仿真模型及算法研究,建立一套适合的数学模型及算法,可用于该锅炉全工况仿真机实时模块的开发。
Starting from a two - layer nonlinear quasi - geostrophic baroclinic vorticity equation containing ekman friction , a new generalized energy is proposed to act as lyapunov function and thus a new criterion of nonlinear baroclinic subcritical instability containing two inequalities is obtained 从含ekman摩擦的二层非线性准地转斜压涡度方程出发，提出了一种新的广义能量作为lyapunov函数，导出了非线性斜压亚临界稳定性判据。该判据含有两个不等式： ( 1 )
