气流

Conditions for maintenance of reticulate dune morphology under modern flow environment include enough space for the development of secondary ridges on the primary ridges in order that the overall pattern can not be modified by the subdominant winds, and sufficient amount of sand supply for the secondary ridges that can withstand the dominant winds.

在背风坡，因原始气流方向、强度和沙丘背风坡形态等的不同出现弱的反向气流，相对强的附体未偏向流和附体偏向流等三种特征次生气流，它们控制着背风坡表面过程、沙丘移动性质、内部层理类型和产状。

Roll cloud heading inland over Shark Bay, Western Australia: A roll cloud is a horizontal tubular formation that forms in the cold downdraughts that spread out ahead of an approaching storm

澳大利亚西部鲨鱼湾上空的滚轴云，正向内陆翻卷而来。滚轴云是水平的管形状云，当暴风雨逼近时，寒冷的乡下气流扩展开来就会形成滚轴云。滚轴云是非常危险的，曾测量到滚轴云产生的上升气流和下沉气流速度每分钟超过1500米。

The mesoscale cyclonical feature in the surface stream near the coastal areas is not apparent while the typhoon approaching the main land. The surface southeast current of typhoon is divided into an east current and a southeast current, making for confluence of local currents and convection.

当台风移近大陆时，靠近沿海地区的地面流场中尺度涡旋特征并不明显，主要表现在台风近地面偏东南气流出现分支，形成偏东与偏东南气流，有利于在沿海地区形成局部气流汇合并引起或增强对流。

The results show that the Reynolds stresses of the flow near the wall at the exit are abviously nonisotropic and the flow fluctuation transport downstream with the flow speed.

结果表明埋入式进气道出口近壁区气流的雷诺应力呈明显的各向异性，其上游的气流脉动是按气流平均速度向下游传输的。

It is revealed that both the roasting and cooling air flow run radially at inlets and then run slantingly upwards or downwards into roasting-preheating zone inside IVAC. And the gas flow in the whole soaking zone is weakened. There are possibly three gas flow patterns in PSF, which are mainly dependent on the ratio of inflow, i.e., the greater the ratio is, the higher the downward roasting air flowrate and the lower the upward air flowrate will be. The critical ratio of inflow mainly depends on the constructional parameters and packed bed conditions of PSF.

结果表明：焙烧风和冷却风在进口处呈放射状，之后斜向上或斜向下分别流入焙烧-预热带和导风墙内；整个均热带内气流较为薄弱；炉内存在三种气流分流的可能，流入风量比是决定气流分流的最主要因素，其中，流入风量比增加，焙烧风下行趋势增大，而冷却风上行趋势减小；临界流入风量比主要取决于结构参数和料层情况。

The results showed that the flow reattachment distance in the lee side of various dune models are ranged from 4.8H to 10.8H depending on different stoss slopes, the maximum of flow reattachment distance was found in the lee side of the transverse dune with a 15° stoss slope angle.

实验结果表明，当来流风速垂直于沙丘脊线时，沙丘背风侧的气流重附距离介于4.8H～10.8H之间，最大重附距离出现在迎风坡坡度为15 的沙丘背风侧；沙丘迎风坡坡度是控制背风侧气流重附距离的主要因素，而自由风速对气流重附距离的控制作用较小。

For strong convective weather , it classified all historical sample events into 4 weather patterns (like northwest , trough area ,west wind and southwest current), established 4 characteristic fields of 400hPa height of HLAFS , then according to the principle of the pattern match calculate and compare the real-time HLAFS forecast products-2-using the similar method inside the big and small key areas , establish forecast equation , finally gain conclusion .To duststrom weather, the historical samples were sorted into duststrom and severe duststrom types in 5 regions (they are whole area, west, central, middle-west and middle-east of Inner Mongolia ),moreover set up different sample databases about ECMWF fields (including 500hPa height, 850hPatemperature and sea-level pressure).In order to making duststrom forecast at different time level , we first filtered the real-time data by FAX data ,and then used the method of similar range degree to compare the historical data to the actual data of ECMWF .To precipitation weather ,they were divided into 2 types that suit or unsuit airplane artificial precipitation stimulation in line with their emergence time and district .The appropriate weather physical factors come from T106 were chosen to establish the artificial precipitation stimulation prediction model . In the actual application , we can get prediction result as long as use the real-time forecast data of T213 in the prediction model .

针对强对流天气将历史样本天气分为西北气流型、槽区型、西风气流型和西南气流型等4个类型，并建立其HLAFS资料400hPa四种特征场，按照模板匹配的原理，用相似分析方法在大、小两个关键区中对实时HLAFS预报产品进行计算、比较，再建立预报方程，得出结论；对沙尘暴天气将其按区域分为全区、西部、中部、中西部以及中东部5类，再按强弱分别分为强和一般2类，建立ECMWF的3个场(500hPa高度场、850hPa温度场和海平面气压场)的历史资料库，在用传真资料消空之后，用相似离度方法计算实时ECMWF资料，做出不同时次的预报；对降水天气按出现时间和区域分为适合和不适合飞机增雨作业2类，选择T106资料中恰当的气象物理量因子，用BP神经网络算法建立人工增雨降水预报模型，实际应用中将实时T213相关预报资料代入预报模型即可。

This is the socalled thin layer penetrating air drying process. The critical thickness of wet silkworm chrysalises is about 27~35 mm. In the thin layer penetrating gas drying process of silkworm chrysalises, the temperature of drying medium is subject to that at which the protein can withstand and the flow rate is subject to the allowable leakage of air from the media layer; c. For the surface convective drying process of stripe porous media e.

对于粒状多孔介质的穿流气流干燥过程，当物料厚度小于某一临界厚度时，厚度的变化对干燥过程无明显影响，即所谓薄层穿透气流干燥过程，就蚕蛹而言，临界厚度约为27~35mm；在蚕蛹薄层穿流气流干燥过程中，介质温度应以蛋白质所能承受的温度为限，流速应以穿流料层时不发生漏风现象为限；c。

The Somali jet is rapidly enhanced two pentads prior to the onset of SCSSM, thus accelerating the eastward extension of the westerly over the Bay of Bengal and leading to the eastward retreat of the western Pacific subtropical high . At the same time, the rapid enhancement of SCS CEF can also result in the northward march of WPSH and the onset of SCSSM. The earlier establishment and stronger southerlies correspond to the earlier onset time of SCSSM, and vice versa. Both composite and correlation analyses show that the 150hPa Asia-Australia CEF in boreal spring has important influences on EASM.

相关分析和合成分析的结果还显示，春季150hPa亚澳越赤道气流对东亚夏季风有重要影响：当春季该气流偏弱时，北半球夏季西太平洋副高强度偏强，位置偏南偏西，南亚高压强度也偏强，这样的环流背景使江淮流域6—7月降水偏多，华南华北降水偏少；反之，当春季该气流偏强时，夏季西太副高强度偏弱，位置偏北偏东，南亚高压强度也偏弱，江淮流域夏季降水偏少，华南华北降水偏多。

Model QS-350 This machine is of horizontal disc type airflow crusher, and the whole crushing process is comprised of air compressor, air storage tank, air freezer and drier, model QS-350 airflow crusher, cyclone catcher and dust collector is ejected into the crushing chamber by means of high speed ejection flow formed by high pressure air through charging ejector, and the crushing nozzle outside ejects high speed air flow into the crushing chamber at a certain direction, making the material severely collided and frictionated therebetween and thus crushed.

QS-350型为水平圆盘式气流粉碎机，整个粉碎流程由空压机、储气罐、空气冷冻干燥机、QS350型气流粉碎机主机、旋风捕集袋及吸尘器等组成。该机是靠高压气体通过加料喷射器所形成的高速射流，使粉碎原料被射人粉碎室，粉碎室外围的粉碎喷嘴，有方向性的向粉碎室喷射高速气流，使物料间产生激烈的碰撞，摩擦而获得粉碎。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。