| 1. | The convergence of air at the lower levels and divergence aloft imply a vertical circulation which is schematically shown in the following cross - sectional diagram
下面是热带气旋的垂直环流示意图，图中可看到低层的空气辐合及高层的空气辐散。 |
| 2. | In this paper , the noninterference movement condition of the cages of vertical circulation parking equipment is established , and the method for the chain transmission system design according to the condition is presented
摘要建立了垂直循环式停车设备托架运动不干涉条件，提出了根据托架运动不干涉条件设计停车设备链传动系统的方法。 |
| 3. | Vertically , tidal mixing had a direct impact on the distributions of nutrients and phytoplankton . nutrients and phytoplankton were well mixed vertically by tidal mixing . the vertical circulation structure at the center of the yellow sea cold water mass is still not so clear
心爪一j刁、流纤i构尚刁二卜分行x楚，夏平夕h …冲水厂卜心的上下流纠构及海汁仍千卜叫。 |
| 4. | It provided not only continuously vapor but also the heat energy and momentum , and induced several meso - scale vertical circulations , in the meantime , it was helpful to maintains the strong upward motion in the rain area
通过诊断分析发现：低空急流提供了源源不断的水汽，同时也向雨区提供了主要的热量和动量，还激发出多个中尺度的垂直环流，使降水具有一定的中尺度特征。 |
| 5. | The basic requirements include good cyclonic inflow i . e . for the northern hemisphere , inward spiralling in an anti - clockwise sense at the lower levels for the initial spin - up process , and good outflow channels at the upper levels for effective ventilation . the convergence of air at the lower levels and divergence aloft imply a vertical circulation which is schematically shown in the following cross - sectional diagram
热带气旋的诞生及发展的基本条件是：在大气低层必须有充份的气旋式气流辐合（在北半球，沿反时针方向螺旋形地流入） ，在大气高层要提供足够的气流外溢通道，这样才可以建立有效的通风机制。 |
| 6. | Whether in the aspect of total rain days or total rainfall amount in a year , ya ' an is always an extreme range , which has been called " ya - an - tian - lou " in chinese . the predicted average physical structures in the raining process are as follows : ( l ) positive vortex and convergent center in the lower and middle troposphere and negative vortex and divergent center in upper troposphere ; ( 2 ) the superposition of the low layer zonal - vertical circulation and the up layer zonal - vertical circulation forms a strong upward current
从6种不同方案对暴雨过程预报的实验看，不同的边界层参数化方案对雨带特征的模拟都具有一定的能力，同时模式模拟的降水对参数化方案的选取是敏感的，不同的参数化方案模拟出的降水范围和雨量分布有所差异，主要表现在降雨量中心强度及雨区分布上。 |
| 7. | By combining with the simulation result of the vertical circulation structure , we propose that the factors induced the distribution difference of calanus sinicus and chlorophyll - a concentration not only include the grazing activities , vertical circulation structure at the fronts also plays an important role . the circulation of bohai sea in spring is examined to provide a reliable physical environment for biological model
首次抽出黄海海洋锋区的垂向环流结构有利于中华哲水蚤在锋区的聚集，叶绿素a浓度高值区偏离锋区也与锋区上升流结构密切相关，模型研究中首先对渤海环流的物理机制进行了研究。 |
| 8. | The contrast analysis for the vertical distribution feature of the simulated physical quantities such as vorticity , divergence , vertical velocity . spiral degree etc suggests that there are a good disposal among the various physical quantities fields in the different stage during the period of sandstorm development , and reveals that the dynamic mechanism of the forming , developing , decreasing of the sandstorm weather and trigger and indication effects of the micro - mesoscale systems and secondary vertical circulation to the occurring and developing of sandstorm in northwest area
对涡度、散度、垂直速度、螺旋度等物理量的水平和垂直分布特征进行对比分析，发现各物理量场在沙尘暴发展的不同时期有着很好的配置，揭示出西北地区沙尘暴天气的形成、发展、消弱的物理机制和中小尺度系统、次级垂直环流对沙尘暴天气发生发展的触发和指示作用。沙尘暴区上空螺旋度垂直分布为高层负值，低层正值，螺旋度大小的演变与沙尘暴的出现有一定的对应关系。 |
| 9. | Second , we discuss the influence of environmental referance potential temperture and thermal wind on mesoscale symmetric instability . we find the expression of disturbance stream function and criterion of symmetric instability by analytical method and conclude that change caused by environmental referance potential temperture with height and thermal wind make critical richardson number and disturbance critical half - wave length of symmetric instability larger , that is to say , they benefit the occurance of symmetric instability . third , we study nonlinear perturbation analysis of mesoscale vertical circulation and evolution equation by means of f - plane . non - hydrostatic balance and filiter model
第二，讨论了环境位温与热成风因子对中尺度对称不稳定的影响。运用解析的方法求出了扰动流函数的表达式和对称不稳定的判据，发现环境参考位温随高度的变化与热成风因子使得对称不稳定临界理查逊数及扰动的临界半波长都变大，这有利于对称不稳定的发生。第三，采用f平面、非静力平衡、滤声波模式，讨论了中尺度垂直环流非线性摄动分析及演变方程。 |
| 10. | By analyzing the abundance distribution of the calanus sinicus at the fronts in the two surveys , we try to find the direct dominant physical processes . and on the basis of that , provide a simple coupled physical and biological model and apply it in the bohai sea . the position of the tidal fronts and vertical circulation structure near the fronts are examined using the blumberg & mellor 3d nonlinear numerical coastal circulation model incorporating with mellor & yamada level 2 . 5 turbulent closure model
论文基于目前国际上普遍使用的blumberg & melior三维非线性环流模型( ecom )并结合mellor & yamada的21 / 2阶湍封闭模型，采用blumberg & mellor改进的半隐式数值差分格式，首先对黄海海洋锋位置及其锋区环流特征、形成锋的主要动力机制等进行了研究。 |
