3 ) the upper air stream circumstances along with strong ssw event mainly was separated to three kinds : the northern advance of aleutian high pressure , the northern advance of north atlantic high pressure , the northern advance of aleutian high pressure and north atlantic high pressure at the same time . their final effect was to make polar region vortex collapse and to increase polar region temperature 3 )伴随强ssw事件的高空环流形势主要有3种：阿留申高压北进，北大西洋高压北进，北大西洋高压和阿留申高压共同北进，它们的最终效果是使极涡崩溃、极区增温。
On the basis of looking up a lot of referenced works , the phenomenon that lateral jet injected into the external air stream surrounding an intercepting missile is analyzed . the effects of jet interaction on forces and moments are described by interaction amplification factor , and the algorithm to calculate the interaction amplification factor is presented , then the motion model and the dynamics model of interceptor are established according to the previous analysis 根据大量参考文献的结论，分析了侧向喷流射入拦截弹外流的流场特征，以干扰放大因子来描述干扰效应对力和力矩的影响，给出了放大因子的计算方法，进一步建立了喷流侧向力和空气动力作用下的导弹运动学和动力学模型。
In the swirl , air stream at the periphery tend to have higher temperature compared to that in the center . by means of a separating plate , the airflow is separated into streams of hot and cold air . each stream of air then emerges from a particular end of the tube , named the cold and hot end accordingly 气体在热端管的流动过程中，外层气流温度升高，内层返流温度降低，高温气流从热端阀流出，低温气体通过冷孔板流出，从而将进涡流管的气流分离为冷热两股温度不同的气流。
Starting from the frozen food and refrigeration principles and using comparative analysis method , we get conclusions that in the blow - frozen device , the open - mode , cold - quantity reclaim , low - press , direct - cooling air , absorbing - heat air cycle have the most significant reductions in food freeze dry cost , food hygiene , devices delicate , organizating air stream , non - electrical heat , high efficiency and safe refrigeration etc . the cold - cumulating and dryness tin is the equipment which applys the store - release characteristic of cold - cumulating stuff , ensures the higher efficiency of open - mode cold - quantity reclaim low - press direct - cooling air , shoulders conveyance of the saturated and frozen air to frozen storeroom to reduce dry cost of food and dry the cycling air to ensure safe and reliable 从食品冷冻和制冷原理入手,用对比分析方式得到了在吹风式冻结装置中,开式回冷低压直接冷却吸热循环空气制冷机具有最大幅度降低食品冻结干耗、确保食品冷冻安全、系统简单、冻结库小巧、气流易于组织、无电机热量、效率较高和制冷安全等结论。蓄冷干燥器是通过蓄冷材料的蓄?释冷特性,来保证开式回冷低压直接冷却吸热循环空气制冷机具有较高的效率,同时蓄冷干燥器还担负着输送饱和低温空气至冻结库以降低食品冻结干耗和干燥循环空气以确保整机安全可靠工作的主要设备。
The disadvantage is that the coefficient of heat transfer is iow and the utilization factor is poor and the drying time so long . moreover because of the defect of structure , it can not be in conformity with the requirements of " gmp " . in order to overcome the shortcoming , we edsigned and developed the penetrating air stream box type drier on the basis of absorbing abroad advanced technology 在传统的水平流厢式干燥器中，气流只在物料表面流过，其缺点是传热系数低、热利用率差、物料干燥时间长且由于结构的缺陷，无法完全符合“ gmp ”药品生产规范。为了克服以上缺点。
In 1999 , the dipole existed in between the okhotsk high and the depression in the north of northeast china , thus the okhotsk high became active and maintained , the subh was located to an area quite further south than usual . the high persisted in the east region of nw china , the cold air flowed to the mid - lower reaches of the yangtze river along the high . in the east region of nw china , air steam under troposphere was strong sinking motion , and formatted the negative vorticity region , the vapour flux divergence was divgence . lt was apparently that the rain could n ' t occur in the eastern portin of nw china . in 2000 year , okhotsk high was very weak or did n ' t exist in , there was high in the east asia - japan , the subh is located to an area further north than usual . in the east region of nw china , the trough maintained , air stream under troposphere was strong ascending motion , the cycolonic circulation was prevailing , the vapour flux divergence was intensive convergences the rain easy happened in the east areas of northwest china 4多梅雨1999年鄂霍茨克海阻塞高压与我国东北北部低压形成偶极子，使得阻塞高压稳定少动，西太副高位置偏南，西北地区东部持续受高压控制，冷空气沿此高压流经长江中下游地区上空；在西北地区东部对流层中下层气流下沉运动较强，呈反气旋涡度，水汽通量散度辐散，不利于西北地区东部降水。空梅雨2000年相反，鄂霍茨克海高压减弱甚至不存在，东亚-日本为高压，西太副高位置偏西偏北，西北地区东部处于西风槽中，对流层中下层气流上升运动增强，盛行低压环流，水汽通量散度强烈辐合，有利于降水生成。
