高速密度流 的英文怎麼說

中文拼音 [gāosùmìdùliú]
高速密度流 英文
high-velocity density current
  • 高 : Ⅰ形容詞1 （從下向上距離大; 離地面遠） tall; high 2 （在一般標準或平均程度之上; 等級在上的） above...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 高速 : （高速度） high speed; high velocity （hv）; high rate; swift; fast; express; high-speed
  1. The method of obtaining high concentration of na2feo4 solution by quick electrolysis mainly contains four aspects : adoption of either a diaphragm or an ionic membrane electrolytic cell in which a thin anodic cell lying between the two cathodes, ( 2 ) using an iron anode that has larger specific surface area, ( 3 ) keeping suitable concentration of naoh in the anodic cell, adoption of lower current density and higher electrolyzing speed. the practical technique parameters follow a s below : the naoh solution of 14 - 16mol / l, the temperature of 303 - 308k, the surface anodic current density of 300a / m2, the unit electrolyzing speed of efficiency larger than 6. 0a / l

    快速電解獲取高濃度na _ 2feo _ 4溶液的方法，主要包括四個方面：採用兩陰極室夾一厚度較小的陽極室的隔膜（或離子膜）電解槽；使用比表面積較大的鐵網陽極；保持陽極室中有適宜濃度的濃naoh溶液；採用較低的電流密度和較高的電解速度。具體工藝參數是： 14 16mol / lnaoh溶液、溫度303 308k 、表觀陽極電流密度300a m ~ 2 、有效單位電解速度6 . 0a / l 。
  2. Finally, because high - speed power solenoid valve is one of the most important executive parts in the electronic control diesel engine and the performances of diesel engine are strongly related to the solenoid valve, the response performance of the solenoid valve is investigated. the response performance of the solenoid is influenced by many factors, such as driving voltage, electric driving unit etc. in order to have high excitation voltage and in low maintaining voltage, a high - low voltage electric driving unit is designed, and in order to make the solenoid valve close more rapidly, an active free - wheeling circuit and a bootstrapping circuit are designed in the electric driving unit, too. in the high - low electric driving unit, high voltage and low voltage are supplied by the dc - dc device and by the accumulator respectively

    高速強力電磁閥的響應性能除了與閥本身的結構和材料有關外，與驅動電壓、驅動電路的設計密切相關，本文通過分析，首先開發出一種高低壓驅動電路，高壓電源是山升壓式dc - dc原理獲取的，低壓由蓄電池本身提供，實現高壓強激和低壓維持的功能，電路中採用有源續流電柴汕機中卜軌知介系統的設訓及其七川j敝略的叭究路進行續流，加誣了電磁閥的關閉速度；採用自舉吐路，降低了場效應管對驅動電壓的要求。
  3. Current density and electroplating velocity has line relation, but the increscent multiple of electroplating velocity is smaller than that of current density. which indicate that current efficiency decreases with the increase of current density at alcb + lialh4 system. at l - 5a / dm aluminum coating is dense and uniform, especially at 2. 5a / dm

    電流密度與電鍍速度兩者近似成直線關系，但電鍍速度增大的倍數比電流密度增大的倍數要小，說明在alcl _ 3 + lialh _ 4體系中隨著電流密度的提高，電流效率逐漸降低。
  4. With the development of power electronics technology and devices in recent years, instead of using the industrial frequency transformer to boost voltage, dc / dc high frequency converter achieves the function. the system has higher power density and conversion efficiency, and the size, weight, ac noise of which has been greatly reduced

    近年來，隨著電力電子技術與器件的迅速發展，使用dc dc高頻變換技術代替工頻升壓，系統具有較高的功率密度與轉換效率，裝置體積、重量與交流噪聲大大減小。
  5. And experimental study on the heat transfer performance and pressure drop characteristic of the process of bubbling evaporative cooling are carried. as there are so little attention and studies on the process bubbling evaporative cooling about heat transfer in the world at present, this paper mainly deals with the effects of the different bare tower velocity, weir height, heat flux density and plate perforation geometries on the heat transfer coefficient and the pressure drop of the process of air flowing

    由於目前國內外對鼓泡蒸發冷卻過程在換熱方面的關注和研究較少，本文對不同空塔速度、不同堰高、不同熱流密度、多孔板的不同幾何尺寸對換熱系數及空氣流動過程阻力的影響進行了實驗研究及理論分析，總結了本實驗條件下換熱及阻力的實驗關聯式。
  6. Development of electromechanical actuation system for flight control is one of the most important technologies in the path to all - electric airplane

    摘要飛行控制中機電作動系統的發展是全電飛機的重要技術之一，而高速大功率密度的無刷直流電動機是其中的關鍵部件。
  7. The flow characteristics, distributions of current density and chemical components, and the performance of these two different designs are calculated and compared. the flow and mass transport characteristics are analyzed in detail, which indicate that strong forced convection is produced in the interdigitated flow field, which consist of dead - end gas channel that force the gases through the porous electrodes. results of comparison show that forced convection induced by the interdigitated flow field in the diffusion layer effectively enhances mass transport of reactants and products, thus leading to a higher cell performance and the limiting current density

    在傳統流道設計的pemfc中，反應物從流道到催化層的供應和生成物從催化層到流道的排出主要是以擴散為主，而在交叉梳狀流道設計中，以流動帶動的對流傳遞則占據了主導地位，而且這種以對流為主的傳遞機理大大提高了反應物和產物傳遞速率，從而有效地改善了電池的極限電流密度和極化性能等特性。
  8. The tests were conducted in the hypersonic low density wind tunnel at nominal test conditions of mach 16, stagnation temperature 923k, stagnation pressure 1. 40mpa and 7. 30mpa. heat - transfer data were obtained on a hemisphere model, a sharp cone and a big blunt cone respectively by means of infrared thermal mapping techniques, that of a 0. 5mm thickness blunt cone by virtues of thermocouples. furth ermore, heat - transfer on all those models was calculated with the theoretical method

    最後在名義m _ = 16 、 t _ 0 = 923k 、 p _ 0 = 1 . 40mpa及7 . 30mpa的高超聲速低密度風洞中，利用紅外熱圖技術獲得了半球圓柱、尖錐、大鈍頭三個模型表面熱流分佈，利用薄壁法技術得到了一壁厚為0 . 5mm的鈍錐模型表面的熱流分佈，並通過工程理論方法計算了模型表面的氣動熱，把理論計算結果與上述試驗結果比較，幾者符合得較好。
  9. According the key factors we find, we bring forward a new conception : multilevel suppressor and design a new high performance suppressor whose ion - exchange membrane has bigger areas and using three electrodes including one cathode ( anode ) and two anodes ( cathode ), at the same time we fill the suppression compartment with one kind of ion exchange resin which has moderate exchange capacity. according to our experiment ' s results, we find the new type suppressor has quite high working current efficiency and suppressing capacity. in most cases, the suppressor ' s current efficiency is over 90 % ; the suppressor can transform the naoh ( concentration : 200mmol / l, flow rate : i. oml / min, conductance : over 10000 i - i s cm " ) to pure water ( conductance : 8. 9 it s cm in chapter 3, the high performance suppressor is applied in determination some trace - amounts ions in plating solution, sewage. in this chapter, we also have a research on the gradient ion chromatography

    第二章首先以xyz - 1型電化學抑制柱為例，分析了電化學抑制柱的抑制過程得出影響抑制容量的主要因素主要是抑制柱的電流效率和離子交換膜的極限電流密度，因此採用中等交換能力的離子交換樹脂作為抑制室的填料以提高電流效率，在通常情況下電流效率可達到90以上；在選用同種離子交換膜的前提下，可通過增加離子交換膜的有效面積達到提高極限電流的目的從而提高抑制柱的抑制容量，因此提出了多級抑制的概念並據此研製了共電極式高容量電化學抑制柱，該抑制柱最高可將流速為1 . 0ml / min ，濃度為200mmol / l電導率超過10000 s ? cm ~ （ - 1 ）氫氧化鈉溶液抑制為電導率低至8 . 9 s ? cm ~ （ - 1 ）的純水，並且具有穩定性高、分析結果準確等優點。
  10. The x - ray diffraction, scanning electronic microscope and the squid were used to characterize the properties of the mgb2 core in mgb2 / fe tapes and wires. the effect of the proportion of mg, b and sic as well as the sintering parameters on the phase formation, microstructure and the critical current densities of mgb2 / fe tapes and wires was discussed in details. the results showed that the high purity of mgb2 core could be synthesized by both the traditional vacuum sintering and the sparking plasma sintering and the vacuum sintering environment restrained the oxidation of mg effectively

    相對于傳統真空燒結， sps燒結方式成相速度快、樣品晶粒細小均勻、 mgb2超導芯緻密性好、晶間連接優良，因而sps燒結樣品的臨界電流密度明顯高於傳統真空燒結樣品，其中未摻雜的帶材樣品經過sps800 ， 15分鐘燒結后，自場下的臨界電流密度jc值在10k時達到8 . 64 105a / cm2 ，而且隨著測量溫度和外加磁場的增加， sps燒結樣品的臨界電流密度下降率比傳統真空燒結樣品緩慢，在20k ，自場時為5 . 97 105a / cm2 ， 20k ， 3t時，臨界電流密度值仍大於104a / cm2 。
  11. The paper works out the ice crystal spectrum distributing in the different macroscopic and micro - backgroud of the cloud ( ie, the thickness, the temperature and the supersaturation with respect to ice of the nucleation layer ). this paper also works out the amount of catalyst which is allowed in the cloud nucleation layer according to the different quantity of the supercooled water, the density of the supersaturation of the vapor with respect to ice. simultaneously, the paper discusses the i nfluence of remaining time when seeding artificial ice nucleus in the different ascending - velocity and altitude, and elicits the proper seeding altitude of the catalyst

    以此解為依據，得出了不同均流時，人工引入冰核在核化層存留時間，再以此時間作為人工冰核凝華增長時間，求出不同的雲宏微觀背景（如核化層厚度、溫度、冰面過飽和度等）下的冰晶譜分佈，經和實際資料比對符合相當好。進而求出核化層中不同過冷水量、冰面過飽和水汽密度下雲核化層可允許的催化用量。同時討論了不同升速，不同高度引入人工冰核時對其存留時間的影響。
  12. By stirring water with the impeller, splash water to the air evenly and widely, strengthen the pond water ' s flowing circulation, make pond water dissolve into oxygen and death of fish, shrimp and eel, raise the breeding density, quicken the growth so to achieve high and stable yields

    通過葉輪攪水，把水均勻而彌散地潑向空間，加強池水流動循環，使池水溶入氧而稀釋和排出有害物質，增加水中的溶氧量，改善水質，防止魚蝦鰻浮頭死亡，提高養殖密度，加速生長，從而達到高產穩產。
  13. From the viewpoint of macro dynamic characteristics of freeway traffic flow, this paper classifies the freeway, gives a nonlinear macro dynamic traffic flow model of freeway using density and speed as state variables and then identifies the parameters by using searching approach step by step, finally gives an identification instance

    摘要從高速公路交通流的宏觀特性和動態特性出發，對高速公路進行了兩級分段，以車流密度和車流速度作為狀態變量，給出了高速公路非線性的宏觀動態交通流模型，進而採用直接搜索法對模型中的參數進行了分段辨識，並給出了辨識實例。
  14. In the hipib strengthening experiments, samples of high - speed steel ( w6mo5cr4v2 ) were irradiated by abstract hipib ( cn + = 30 %, h + = 70 %, ion energy 250 kev, ion current density 60 - 180a / cm2, pulse duration 80 - 100 ns ). microstructure investigation and properties characterization of the treated hss samples were carried out to investigate the effect of current density and pulse number of incident hipib on the surface modification treatment. the physical mechanism of the hipib - solid interaction was established based on the experiments

    在hipib轟擊材料表面方面，本文選擇成分由c ~ （ n + ） （ 30 ）和h ~ + （ 70 ）組成、加速電壓為250kv 、脈沖寬度為80 100ns的hipib對高速鋼（ w6mo5cr4v2 ）進行表面輻照處理，研究離子束流密度和脈沖次數對高速鋼微觀結構和宏觀性能的影響，探討了hipib與材料表面相互作用的物理機制。
  15. 6 ), the process that h20 is adsorbed on the electrode surface and the hydroxyl group is formed to oxidize the co may be the rate - determining step ; in the region iil ( logi > l. 6 ), all of the tafel curves show a curvature until the current densities reach the peak value, indicative of a possible limiting current. the effect of rare earth elements on methanol electro - oxidation has not been reported in literatures

    在低極化區（ logi 1 . 3 ） ，甲醇發生脫氫反應並形成反應中間體，其中co成為未被氧化的毒物，此過程成為速率限制步驟；在更高的極化區（ 1 . 3 logi 1 . 6 ） ， h _ 2o吸附在電極表面並解離生成[ oh ] ，促進了co的氧化，此為此階段速率控制步驟：在第3個極化區（ 10gi 1 . 6 ） ， tafel曲線發生彎曲，電流密度也最終達到峰值。
  16. Three kinds of inflows with different combination of temperature and salinity are studied. results show that difference of diffusion between temperature and salinity have little effect on mean flow fields. but significant effects will arise when components are distinct in contribution to water density

    成果分析指出了溫鹽共同作用引起的高雷諾數紊動浮力流動受溫度和鹽度的分子擴散速率差異的影響很小：但是因各組分對環境水體密度影響差異會造成不同的浮力流動特徵。
  17. The position of the trajectory depends on the ratio of bead - to - fluid density, the ratio of bead - to - disc radius and the reynolds number which describes the operating conditions of the stirred media mill. by means of the beads motion in the calculation domain, the influence of different comminution operation parameters on comminution results is discussed. those parameters mainly include the beads size, beads density, stirrer angular speed and liquid density and viscosity etc. those parameters are optimized so that the comminution results are improved

    通過研究研磨介質在計算域內的運動來探索不同的粉磨技術參數對粉碎效果的影響，這些粉磨技術參數主要包括磨介尺寸、磨介密度、攪拌盤速度、液流密度及粘度等；通過優化這些參數來達到提高攪拌盤式攪拌磨粉磨效果的目的。
  18. With the increasing of weir height, the pressure drop increases. and it is independent of bare tower velocity and plate dimension. the correlation before was corrected as follows : pl 3911z this paper analyzed the heat transfer coefficient between the outer wall of heat tubes and cooling water

    堰高越高，換熱系數越大；在鼓泡范圍內，空塔速度越大，換熱系數越大；在本實驗條件下，熱流密度在10kw / m2附近換熱系數達到最大值。
  19. Put up the cold experiment of the three - phase fluidized bed with multiple orifice balls, research on the influence of the superficial gas velocity, the filler static height and the liquid density on the resistance character and the desulfurized efficiency, summarize the virtue of multiple orifice balls

    摘要對多孔球為填料的三相流化床進行冷態試驗研究，研究不同工況下氣體空塔流速、填料靜止高度、噴淋密度等因素對流化床阻力特性和脫硫效率的影響。
  20. Abstract : recrystallized in multiple solvent consisting of ethanol, low - carbon alcohol and water, antioxidant1010 was refined, and the main factors of affecting crystalliza tion including solvent, water et. al. were studied in the laboratory, and individua l delta - form crystals of antioxidant1010 with good stability, fast drying speed, hi gh purity, heavy bulk density, good flowability, low volatility was obtained

    文摘:在乙醇、低級醇a和水三元混合溶劑中，通過對抗氧劑1010粗品的重結晶精製研究，制備得到了純度高、堆密度大、流動性好、揮發份低、質量穩定、乾燥速度快的型抗氧劑1010 。
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