The result showed that the strong storm followed by mesoscale squall line was primary cause of strong sandstorm producing, steps and ladders short wave trough of 500 hPa was great criterion triggering system for the mesoscale squall line producing, the essential dynamic condition was provided by distortion field and the mesoscale low pressure of 700 hPa for the strong sandstorm forming and maintaining in mid-west of Hexi Corridor, the deep vertical circulation development condition was basic power that urged squall line to occur and sand dust to curl up, which was provided for the deep convection development by superimposition of lifting movement before ground cold front and ascendant current of secondary circulation in upper air jet entrance region, temperature and the barometric gradient around the cold front was enlarged by enhancement of ground thermal low and temperature diurnalvariation of afternoon, by which essential thermal energy unstable condition was provided for the gale and strong sandstorm eruption, the strong sandstorm appeared in downstream of -200 m^2s^(-2) center of vertical helicity, the vertical helicity had good instruction significance for development of squall line and landing region of sandstorm, the mesoscale squall line occurred in unstable stratification, basic condition of potential energy transforming as kinetic energy was provided by strong unstable stratification for the strong sandstorm forming and developing.
结果表明：中尺度飑线所伴随的强风暴是产生强沙尘暴的主要原因；500 hPa阶梯短波槽是中尺度飑线产生的大尺度触发系统，河西走廊中西部700 hp变形场、中尺度低压为强沙尘暴形成和维持提供了必要的动力条件；地面冷锋前上升运动与高空急流入口区次级环流的上升气流的叠加，为深对流发展提供了深厚的垂直环流发展条件，是促使飑线发生和沙尘卷起的基本动力；地面热低压的加强和午后气温的日变化加大了冷锋前后的温度和气压梯度，为大风、强沙尘暴爆发提供了必要的热力不稳定条件；强沙尘暴出现在垂直螺旋度为－200平方公尺/s^2中心的下游，垂直螺旋度对飑线的发展和沙尘暴的落区具有较好的指示意义；中尺度飑线发生在不稳定层结内，较强的不稳定层结为强沙尘暴形成、发展提供了位能转化为动能的基本条件。
Some important conclusions are presented with a great deal of foundational experiments based on theory of electrochemistry and growth method of electro-deposit.1 Results show that limiting current density of electroforming will be improved from 10~20A/dm2 to 390A/dm2 due to high mass transfer velocity and small diffusion layer thickness.2 Locality of electroforming is determined by electric field distribution and strength. Its closely relevant with voltage. The more voltage is, the higher electric field strength and distribution area. Other parameters of electroforming have an indirect influence on locality through strength and area of electric field.3 Good surface quality can be obtained by selecting optional current density and improving scanning velocity and jet flux.
通过分析射流电铸的电化学机理和电结晶生长方式，并结合大量的基础工艺实验，得出以下结论：1采用射流电铸的方式，由于提高了物质迁移速度和降低了扩散层的厚度，可将电铸的极限电流密度从传统的10～20A／dm~2提高到390A/dm~2以上； 2铸斑的定域性取决于电场的分布形态和电场的强度，它与电压和流场密切相关，电压越大电场越强分布面积越大，其他电铸参数也是通过影响电场的大小和分布来间接地影响定域性的； 3实验还发现要获得较好的表面质量，可提高扫描速度、喷射流量、和选用适当的电流密度。
The effects of voltage, temperature, speed of flow, anode caliber, main salinity on current, current efficiency, settling rate were studied by jet flow electrodeposition watt nickel.
通过射流电沉积瓦特镍电解液研究了电压、电解液温度、射流速度、主盐浓度、阳极喷嘴口径对沉积电流、沉积速率、电流效率的影响。
In the beginning of this paper, the current status and achievements in the research field of Pelton turbine are introduced respectively by means of pipe flow, free jet and bucket flow.
本文在首先介绍了冲击式水轮机内部流动中管内流、自由射流以及水斗绕流等方面的研究现状和进展。
The coal filled polyolefin master batch has been applied to produce the anticorrosive pipe and the wire or cable coating material. In this dissertation, they were studied of ultra-fine jet milling and cyclone classifying of coal, F-C alkylation's surface modification, surface wetting of coal powder, mechanical properties and direct current conductance of coal filled polypropylene composites.
通过对煤进行闭环的超细粉碎分级，脱除部分挥发分、表面化学改性和强制排气式共混，制得了具有广泛用途、成本低廉的黑色煤粉填充聚烯烃母料，将该母料用于热塑性塑料，获得具有较好强度、韧性和优良电绝缘性能的复合材料，并在耐腐蚀管材、电缆料等产品中的初步应用。
So, to play the role of the Vietnamese aggressor they brought in this L-39 Albatross, which is the current standard Soviet bloc military jet trainer, and wasn't operating during the Vietnam war.
因此，要发挥的作用越侵略者，他们带来了这一L - 39信天翁，这是目前的标准苏联集团的军事喷气教练机，而不是操作系统在越南战争中。
Now siqsaq requirements through association to undertake this task, the e-regulatory codes now there are different views, considers it necessary, the current problem is that Jet speed and business card printing and membership card making speed will be synchronized, for a while I talk about the us a Tetra Pack to 50 metres per minute, ink-jet now reaches 60 metres out of sync.
此刻国度质检总局给求经功协会保举来承当这个职分，电子羁系码的题纲此刻还有一些差别的成见，觉得有操纵这个必给，此刻活命的题纲不离是喷墨速率和制卡和会员卡制作速率会有同步，好一阵我讲一下我们怠工利乐包每不合钟给50米，喷墨此刻到达60米差别步。
Its main features: the volume of adjustable water jet nozzle, in accordance with the needs of customers customized different nozzle; over-current components for stainless steel, if the material may also have other requirements; irrigator can also be fitted out fitted dark; reliable and useful.
它主要特点：喷嘴喷水量可调，根据客户的需要订制不同的喷嘴；过流部件为不锈钢材质，如果对材质有其它要求也可；冲洗器即可明装也可暗装；且实用可靠。
The possibility for preparing nanocrystalline materials by jet-electrodeposition technique is also analyzed. Corresponding the research in the article, a set of unsubmerged single circular jets equipment was designed. In chapter 2, jet-electrodeposition was carried out both under direct current condition and pulse current condition. A series of samples for nanocrystalline nickel coating were prepared under different deposition parameters.
在第二章中，采用喷射电沉积技术分别使用直流和脉冲两种波形的电流进行电沉积，改变电沉积工艺参数制备了一系列的纳米晶镍镀层样品，使用X射线衍射、扫描电镜、透射电镜、维氏硬度计等仪器对镀层微观结构和性能进行了分析和表征，主要考察了在直流喷射电沉积和脉冲喷射电沉积方式下，沉积参数如电流密度、电镀液喷射速度等对镀层微观结构和显微硬度的影响。
According to hardware design, control system of equipment is studied which transducer closed-loop control is at the core. The equipment can eject stable and isopiestic pressure water jet, and display the current pressure of water jet real time.
根据硬件设计，研究了设备的控制系统，主要以变频器闭环控制电机为核心，使喷嘴射出稳定、恒压的水流，并实时显示当前的水射流压力。
A good idea to 50 Hz alternating current, and when the paper for more than 100 m/m2, it is recommended that discharge area guniting 0.1MPa of bihend, Jet tube 6~13mm bore diameter, the orifice diameter of 1~1, holespacing is 50~60mm at the width of each cm to 0.49~on air volume 0.66L/min to disperse air ionization, increasing the Elimination of the effects of static electricity.
接流电最坏为50Hz，当纸100m/m2以上时，倡导在充电区喷0.1MPa的压缩氛围，喷气惯内径为6～13mm，喷孔直径为1mm，孔距为50～60mm，每厘米幅宽下风度为0.49～0.66L/min，以不停驱散电即的氛围，调矮打消静电的不败果。
The purpose of this paper is to find the proper character of cooling water and the ways of it pass in and out the jet, which make sure that the anode of plasma ignition jet will not be ruined, to prolong the useful life of the pole, by using the numerical analyze in plasma ignition torch against heat transfer of anode and cooling-water against convection current heat transfer, and process the simulation calculation by using FLUENT soft.
本文通过对等离子体点火炬与阳极传热以及冷却水与对流湍流传热的数值分析，运用FLUENT软件进行模拟计算，找出满足使等离子点火器阳极不被烧蚀的冷却水的合理参数及冷却水进出水方式，来延长电极的使用寿命。
Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively; (2)the pressure is distributed more equality, the transition area is larger.
论文的主要内容包括：(1)简述了阀门研究的现状与发展，在分析与总结国内外流体流动模拟研究的基础上，探讨开展阀门内水流运动数值模拟的意义；(2)对特定型号的射流泵进行了内部流场的数值模拟研究，并与实验数据相比较，验证了应用Fluent进行数值模拟的可行性和可靠性；(3)针对调流阀的特点，对特大口径环喷式流量调节阀进行流场计算，其设计指导思想如下：1、控制旋涡，减小旋涡区，减小涡的强度； 2、控制压力分布，使阀体受力更均匀，改善局部应力状态，提高阀门使用的安全性； 3、最小绝对压力高于水的汽化压力，不产生汽蚀。
Increase an air decontamination system in the foundation in a type machine, principle is air that exhaust fan will through percolation, from the engine room crest of the net sends in to spray to paint the space after filtering, spraying surplus oil fog of the paint creation and varnishing the flavor was taken to spray to paint by the midhty current of air building collections the inside passes water fog decontamination empress that several waters fog of the stainless steel water plank empress spray a jet, from row breeze tube fly to eject.
在A型机的基础上增加一个空气净化系统，原理是抽风机将经过过滤的空气，从机房顶的滤网过滤后送入喷漆空间，喷漆产生的多余油雾及油漆味被强大的气流带到喷漆房收集口内通过不锈钢水帘板后的多个水雾喷头喷出的水雾净化后，由排风管流向面排出。
High temperature and high pressure exhaust is discharged from exhaust hole, and produces periodicity pressure pulsation noise and air current jet noise, at the same time, it excitated other components'vibration and noise, such as vibration and noise of valve plate、shell.
高温高压气体从排气口排出，产生了周期性排气脉动噪声和气流喷注噪声，并且激发出其它部件的振动和噪声，如阀片的振动噪声、外壳的振动噪声。
The air current sound generators at present include the Hartmann whistle, vortex whistle, jet-edge whistle (resonant wedge whistle), single-hole jet rotary valve, multi-hole jet rotary valve, and so on.
目前采用的气流发声器有Hartmann哨、旋涡哨、喷注边棱哨（簧片哨）、单孔喷注旋转阀和多孔喷注旋转阀等等。
By using the same DC arc plasma generator, long laminar plasma jets are generated with lower working-gas flow rates and the laminar jet length increases apparently with increasing working-gas flow rate or arc current;
采用同一个直流等离子体发生器，工作气体流量小时产生出层流等离子体长射流，射流长度随气体流量或弧电流的增加而明显增加；
While short turbulent plasma jets are generated with higher working-gas flow rates and the turbulent jet length is almost independent of the working-gas flow rate or arc current.
工作气体流量大时则产生出湍流等离子体短射流，此时射流长度几乎与工作气体流量或弧电流无关；
The relationship between jet flow rate, current density and cathodic overpotential was studied by measuring cathodic polarization curve in simple sulfate system.
通过阴极极化曲线的测定研究了硫酸盐电解液喷射速度u（流速）对电流密度jc和阴极过电位ηc的影响。
To achieve intelligential precision machining of arbitrary space orbit, a eddy current sensor with waterproof type and no contact is designed in view of sheet metal, and eddy current sensor is applied to water jet cutting robot system.
为了实现空间任意轨迹精细加工的智能化，针对金属板材，设计了防水型、非接触式电涡流传感器，并将其应用于水射流切割机器人系统。