亚临界对称不稳定,subcritical symmetric instability
1)subcritical symmetric instability亚临界对称不稳定
1.Results show that:(1)The rainstorm process can be divided into two periods,nonlinearsubcritical symmetric instability might be the main mechanism.对7月5日20时—12日08时淮河流域、安徽中北部的降水过程诊断分析,并利用WRF模式对7月6日08时—7日20时安徽中部的暴雨过程进行数值模拟,结果表明:(1)7月5日20时—12日08时降水过程可分为2大段,非线性亚临界对称不稳定可能是该时段强降水形成的重要机制;(2)u和v两分量扰动增强均超前于暴雨的增强,并对强暴雨的发生有指示作用;非地转作用达最强和冷暖空气达最强分别对强暴雨发生也有12或24 h的指示作用;(3)得到降水强度、高低空急流及其扰动风场这5者极大值的时空配置;(4)得到暴雨前期,高低层涡度场和散度场的时空配置特征。
2.The results show that (1)this precipitation process can be divided into three periods and the nonlinearsubcritical symmetric instability is the main mechanism;(2)the increase of rainfall has a close relation with the increase of the disturbance wind which can often be found before the increase of rainfall,.对1998年7月20日00时—8月1日12时这段梅雨暴雨过程进行诊断分析,并利用MM5V3中尺度模式作梅雨暴雨的数值试验,结果表明:(1)本次梅雨暴雨分为3大段过程,非线性亚临界对称不稳定可能是3段梅雨暴雨形成的重要机制;(2)扰动风场增长与降水增长关系密切,扰动风场的增长会超前于降水的增长,非线性亚临界对称不稳定的增强可能使降水增强;(3)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。
英文短句/例句
1.The nonlinear subcritical symmetric instability belongs to mesoscale dynamics.非线性亚临界对称不稳定属于中尺度非线性动力学范畴。
2.The Statistic and Diagnostic Analysis of MeiYu Storm Rainfall and the Fringe Study of Subcritical Symmetric Instability;梅雨暴雨的统计诊断分析和亚临界对称不稳定的初步研究
3.Analysis of Spatial-Temporal Structures and Nonlinear Subcritical Symmetric Instability in a Heavy Rainstorm in North Jiangsu一次梅雨期苏北大暴雨的时空结构及其非线性亚临界对称不稳定
4.Analysis of Spatial-Temporal Structures and Nonlinear Subcritical Symmetric Instability in a Heavy Rainstorm in North Jiangsu;一次梅雨期苏北大暴雨的时空结构分析与非线性亚临界对称不稳定
5.Diagnosis and Numerical Simulation of Nonlinear Subcritical Symmetric Instability Function in a Rainstorm Process;一次暴雨过程中非线性亚临界对称不稳定机制的诊断分析和数值模拟
6.A Theory on General Nonlinear Subcritical Moist Symmetrical Instability and Numerical Simulation;广义非线性亚临界湿对称不稳定的理论研究和数值模拟
7.Thermal Stability of BPA and DMT in Supercritical/Subcritical Fluid;超/亚临界流体中BPA和DMT的热稳定性研究
8.Not only important to the Chinese economy, a stable Renminbi also played positive role in stabilizing the Asian and the world economic development.这不仅对保持国内经济稳定起了重要作用，而且对稳定亚洲乃至世界经济也发挥了积极作用。
9.Asymmetric Information,Institutional Holding and the Price Volatility信息不对称、机构持股与价格稳定性
10.Absotute Stability of the Critical Case of a Class of Nonlinear Control Systems一类非线性控制系统临界情形的绝对稳定性
11.half-symmtric unstable resonator半对称非稳定谐振腔
12.The friction factor has a little effect on bucking critical load.摩擦系数的改变对临界失稳载荷的影响不大。
13.Axisymmetric Pulsational Instabilities in Weakly Magnetized and Isothermal Accretion Disks弱磁化等温薄吸积盘的轴对称脉动不稳定性
14.The Axisymmetric Pulsational Instability in Weakly Magnetized Accretion Disks with Viscosity含粘滞的弱磁化吸积盘的轴对称脉动不稳定性
15.Research on Linear and Nonlinear Mesoscale Symmetric Instability Theory;线性和非线性中尺度对称不稳定性研究
16.Analysis of critical flow velocities of pipe conveying fluid under relaxation of boundary conditions固定约束松动对输流管道稳定性和临界流速的影响
17.Experimental Study of the Two-phase Flow Pressure Drop Instability in Vertical Parallel Inner Threaded Tubes of a 600 MW Supercritical CFB(Circulating Fluidized Bed)600MW超临界CFB垂直并联内螺纹管两相流压力降不稳定试验研究
18.Clinical Research on Diagonosis of Unstable Angina with Intravascular Ultrasound血管内超声对不稳定性心绞痛患者的临床研究
相关短句/例句
symmetric subcritical instability对称亚临界不稳定
3)Subcritical instability亚临界不稳定
1.A two layer quasi geostrophic model forced by surface friction and radiative relaxation is used to study numerically the phenomenon of subcritical instability in baroclinic atmosphere.利用一个由表面摩擦和辐射张弛强迫驱动的斜压准地转两层模式作数值试验 ,来研究斜压大气中的亚临界不稳定现象。
4)baroclinic subcritical instability斜压亚临界不稳定
1.First using analytical method, we obtained the nonlinearbaroclinic subcritical instability criterion and symmetric subcritical instability criterion.本文利用解析方法导得了大气中非线性斜压亚临界稳定性判据和对称亚临界稳定性判据；并分别用数值试验方法分析了斜压亚临界不稳定的影响因素以及亚临界对称不稳定在一场暴雨过程中所起的作用，提出了产生暴雨的新的物理机制。
5)Symmetry instability对称不稳定
1.In this paper, a modified symmetry instability criterion for thermal wind non equilibrium basic flow is deduced by using two dimensional liner equations with Boussinesq approximation of moist air.从湿大气的绝热、无粘、包辛内斯克近似的二维线性化方程组出发 ,考虑基本气流热成风不平衡 ,在经典的对称不稳定理论基础上推导出修正了的对称不稳定判据 ,发现基流热成风不平衡在一定条件下有利于对称不稳定发展。
6)Symmetric instability对称不稳定
1.Advances in synoptic analysis and application of symmetric instability theory对称不稳定理论的天气分析与预报应用研究进展
2.The results show that the existence of the maximum of inertial stability in the left front of the low level jet is favorable to the accumulation of moist thermal energy and that the conditional symmetric instability or convective instability can be expected in this region.通过对低空西南急流左前方和高空偏北大风轴右后方的惯性稳定性和对称稳定性的理论分析和实例计算 ,表明 :低空急流左前方惯性稳定度大值区的存在 ,有利于低层湿热能量的积累 ,使低层倾斜对流的不稳定发展更多期望于条件性对称不稳定或对流不稳定 ;高空偏北大风轴 (西风急流 )的存在 ,是其右后方 (右侧 )出现对称不稳定的有利条件 ,高空相对容易出现干对称不稳定 ;惯性稳定性的作用 ,使低层的倾斜对流更偏向于垂直方向 ,有利于对流发展 ,使高层的倾斜对流更偏向于水平方向 ,有利于高层辐散。
3.The dynamic stability of meso-scale symmetric perturbation is discussed in terms of two-dimensional fluid-dynamics equations under anelastic approximation,which obtains the criterion of symmetric instability in an adiabatic case.采用滞弹性近似下的二维流体动力学方程组 ,讨论了中尺度对称扰动的动力稳定性 ,得到其绝热情况下对称不稳定的判据条件。
延伸阅读
对称与非对称反映客观事物在结构、功能、时空上的特殊联系的范畴。对称指事物以一定的中介进行某种变化时出现的不变性，非对称指事物以一定的中介进行某种变化时出现的可变性。在自然界中普遍存在，形式多样。对称有空间对称(包括形象对称和结构对称)、时间对称、概念对称等。
