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drag     
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  阻力
     Calculation of the Drag of Wings with Arbitrary Planform by Use of Network Method at Supersonic and Subsonic Speed
     用网格法计算任意平面形状超、亚音速机翼阻力
短句来源
     DETERMINATION OF THE ROTATION DRAG OF THE SINGLE IDLERS
     单托辊旋转阻力的测定
短句来源
     A Computation Formula for the Satellite Atmospheric Drag Coeffiqient
     卫星大气阻力系数的计算公式
短句来源
     On a Minimization Problem of a Triple Drag Integral
     关于三重阻力积分的极小化问题
短句来源
     A STUDY OF THE INFLUENCE OF DENSITY AND GRAIN-SIZE OF CLOUD OF PARTICLES ON DRAG COEFFICIENT IN GAS-SOLID TWO-PHASE FLOW
     气-固两相流中颗粒群的稠密度及粒度对阻力系数影响的研究
短句来源
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  拖曳
     The main parameters calibrated in the model are dispersion coefficient(a=0.07, b=0.7), roughness length(0.02m), wind drag coefficient(Cwd=3%), and evaporation rate(0.1/d).
     经过率定后确定模型中主要参数值如下:扩散参数a=0.07,扩散参数b=0.7,粗糙长度=0.02m,风拖曳系数Cwd=3%,蒸发率kE=0.1/d。
短句来源
     After many numerical experiments, the product of the drag coefficient and air density is chosen as a constant, i.e. PaCD = 2.5×10~6g/Cm3, while the typhoon radius is chosen as 95km except for typhoon No.
     经多次试验,选定拖曳系数与空气密度之积为一常数pa·CD=2.5×10~(-6)g/cm~3。
短句来源
     Various methods of linearization of nonlinear drag force are introduced in this paper. The methods for direct calculation of zero and second order moment of nonlinear drag force have been developed.
     本文论述了非线性拖曳力的各种线性化方法,导出了非线性拖电力谱零阶矩和二阶矩的直接计算公式,并根据谱的零阶矩和二阶矩,提出了评价线性化方法的判定方法。
短句来源
     By fitting the combined field data and lab data, it is found that f(δ) = AδB,where A = 0.13 , B = -0.27. So with the larger wave steepness, the drag coefficient will increase more slowly with the increasing wind speed.
     通过对实验室风浪槽数据和历史文献数据进行拟合,得出波陡函数f(δ)随波陡δ的变化趋势为f(δ)=Aδ~B,其中A=0.13,B=-0.27,即波陡越大,f(δ)越小,海面拖曳系数随风速变化越慢;
短句来源
     Two-dimensional numerical simulation with a given temperature field and negative buoyancy indicates that:(1) the mantle convection drag force plays an important control role to subducted depth and subducted rate. Its change from 100 MPa to 20 MPa results in decreases of the subducted depth from 231 km to 151 km and subducted rate from 10.79 mm/a to 5.46 mm/a;
     利用考虑温度场和负浮力的二维数值模拟表明:(1)地幔对流拖曳力对俯冲深度和俯冲速度有重要控制作用,从100MPa 到20MPa 的变化将导致俯冲深度由231km 减到151km,速率由10.79mm/a 减到5.46mm/a。
短句来源
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     The results show that the drag coefficient C D is equal to ( am1.54±0.24)×10 -3 in this sea region;
     结果表明:该海域的力系数CD=(1.54±0.24)×10-3;
短句来源
     On Morison Equation's Drag Coefficient C_D
     对莫里森方程中力系数C_D浅析
短句来源
     (2) The drag coefficient;
     (2 )力系数 ;
短句来源
     The correlation used to predict the drag coefficient of multiparticle-fluid systems, which is applicable for Re number Re_m<2×10~5, was given after some modifications were made for the Re number and the drag coefficient of single particle—fluid systems.
     并对单颗粒-流体系统的Re数和粒子的力系数进行修正,给出了一个适用于Re_m<2×10~5的多颗粒-液体系统中粒子力系数的关系式。
短句来源
     CALCULATING DRAG COEFFICIENT OF SPHERICAL PARTICLES DIRECTLY
     球形颗粒力系数的直接计算
短句来源
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  “drag”译为未确定词的双语例句
     The Research of Drag Reduction in Pipe due to Dilute PW-30 Solutions
     PW-30稀溶液的管内减阻研究
短句来源
     An Experimental Study of Drag Reduction Onset by Dilute Macromolecular Polymer Solutions in Pipe Flow
     高分子聚合物稀溶液管内减阻起始的实验研究
短句来源
     Model. Test of Spare Drag Head of 1000M~3 Drag Suction Dredger
     1000方耙吸式挖泥船备用耙头模型试验
短句来源
     High Polymer Used to Reduce Drag and It's application to the Pipeline
     高聚物减阻及其在管道上的应用
短句来源
     An Investigation of the Optimal Parameters of P-type Ge Element in Photon Drag Infrared Detector
     红外光子牵引探测仪中P型锗元件最佳参数的研究
短句来源
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  drag
Formation of a cross-linking complex of dinitrogenase reductase-activating glycohydrolase (DRAG) with membrane proteins from Rho
      
Association of dinitrogenase reductase-activating glycohydrolase (DRAG) with membrane proteins of chromatophores has been investigated.
      
Complex formation was observed both in native chromatophore membrane and in chromatophores treated with 0.5 M NaCl in the presence of homogeneous DRAG and glutaraldehyde in cross-reaction.
      
The molecular weight of the complex was around 200 kD, which is consistent with the association of DRAG with three or more chromatophore membrane proteins.
      
It was demonstrated that ammonium transport protein and P11 protein are possible candidates for association with DRAG in chromatophore membranes.
      
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Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red...

Following a series of experiments conducted in East China Agricultural Re-search Institute (Nanking) during the past years,the "red arsenic",a well-knownraw-drug (containing approximately 90% of As_2O_3,9% of AS_2S_2 and 1% of mis-cellaneous substances),is found to be acceptable as seed disinfectant for the controlof cereal smuts.This raw-drug is not only excellent in effectiveness,but alsoeasily obtainable in this country. Incidence of infection of wheat bunt in the plots receiving 3 different treatments,namely,red arsenic (inoculated seed grains dusted at the rate of 0.05 % by weight),copper carbonate (0.3%),ethyl mercury phosphate (0.05%),during the last 4years,averaged 0.2%,1.4% and 2.7%,respectively against 44.8% in the control.The corresponding figures for the flag smut of wheat were respectively 3.1%,0.8%,5.0% against 20.5%; for the covered smut of barley,0.9%,1.1%,0.9% against1.6%; for the kernel smut of oats,6.8%,3.1%,0.5% against 41.4%.The resultsmake us believe that this native raw-drug is not inferior,in some cases even su-perior,to other fungicides now extensively manufactured and considered efficientin preventing the various cereal smuts.But in the control of the covered smut ofbarley,as we have already shown elsewhere,another native raw-drag,sulphur ismore effective.In the last 3 years,field experiments were carried out to studywhether arsenic gives beneficial effect on the germination of seed and on the yieldof grain.Arsenic was applied as dust to the clean seed wheat following thestandard hot water treatment.Data showed that the number of seedlings in asingle 12-ft.row ranged 368-400 from treated seed as compared with 362-386 fromuntreated seed.Yield of grain also increased 4.7 to 23.6 per cent.It is,there-fore,evident that this fungicidal dust,when properly used,is at least not injuriousto seed wheat.The following points,however,must be borne in mind when thearsenic treatment is put into practice: (1) The dosage should not be higher than0.05 per cent and lower than 0.005 per cent by weight of seed grain.Otherwise, ??it would be either injurious to seed germination or ineffective for disease control.(2) Arsenic can be applied only to thoroughly dried seed grain. Seed wheat con-taining 24% of moisture when treatment was made, lost its vitality in a very fewdays, while that with less than 12% moisture can be stored for one month withoutspoilage. (3) Arsenic reduced germination of seed grain after storage at the highertemperatures. Under laboratory conditions, seeds, treated during hot summer whenthe air temperature ranged between 31 and 35℃, largely lost their germinativecapacity within half a month, but seeds, treated in cooler season when air tempera-ture dropped below 22℃, germinated as untreated ones after being stored for 3months or longer. (4) The relative humidity during storage played the most im-portant role in causing arsenic injury to the seeds. Seeds of wheat containingproper moisture (around 12%) dusted with arsenic at correct rate (0.05% byweight), failed to germinate after being stored for 5 days at temperatures above30℃ under 100% r.b.; but there was little or no injury after a storage period ofover 7 months at 37℃ under 18% r.h. (5) The length of storage period is alsoa factor in causing arsenic injury, and at the same time affecting the efficiency ofthe treatment. Seeds dusted with arsenic at a dosage of 0.05% during mid-summer(July of 1953) retained their germinative capacity within 0.5 month, but no seedsgerminated after 2.5 months' storage. On the other hand, almost complete controlof disease was obtained from thoroughly infested seed grain dusted with 0.0125%of arsenic and stored for 60 days, but similarly treated seeds which were sownimmediately, gave 45.15% infection as compared with 72.77% in the check plot.Consequently, the proper method of using arsenic against cereal smuts is to dustthoroughly dried seed grain at the rate of 0.05-0.0125% by weight and to storetreated seeds under cool (below 25℃) and rather dry (around 80% of r.h.) con-ditions for a period of about one month. According to the results obtained from experiments conducted under bothlaboratory and field conditions, it is found that there is no synergism nor antago-nism between arsenic and such filling materials as ashes, slake lime, talc, charcoalpowder, and calcium phosphate; and that neither soil temperature nor soil moistureact as factors influencing the germination of treated seeds.

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後...

(一)用紅砒粉末作為種子消毒處理藥劑,對於幼苗感染性的小麥腥黑穗、小麥稈黑穗及燕麥堅黑穗等,有極良好的防治效果。但對大麥堅黑穗及條斑病,則不見功。(二)紅砒使用得法,對於麥種絕對無害;而且對於大麥、小麥的清潔種子,有積極的增產作用;惟對於燕麥還未能肯定。(三)紅砒粉末的拌種用量,當以種子重的0.025—0.05%為準簧僦?.005%,仍有殺菌效果。(四)為了增大藥物的容積,使得微量的紅砒粉末能够均勻週到地沾着每一麥粒,可用滑石粉、木灰末、甚至消石灰、草木灰或過磷酸鈣來稀释。(五)麥種拌砒後,須經一定期間的貯藏後播種,方顯出其强大的殺菌防病效果珉S拌隨種,則效果较少。至貯藏期間的久暫,則當因季節和用量等等而異。大致可以一個月為度。(六)紅砒使用不得其法,易起藥害。而藥害有無的關键,主耍在於拌砒後貯藏中的濕度,其次才是温度。如充分乾燥,在酷暑的氣候條件(37℃)下,貯藏7個月,尚??無妨礙。至於播種時的地温土濕,則關係極微。(七)紅砒的藥害與麥種處理當時的含水量有密切關係.含水量多,極為蝛U;含水量在12%以下,即安全無礙。(八)在自然狀况下用紅砒處理麥種,應當避去炎夏季節。又麥種拌砒前,必須充分晒乾。拌砒後,必須貯置高燥處所。

The pharmacological action of the bulb of Lycoris radiata Herb. is commonly known as an emetic and an expectorant. In this report, the authors further investigated the stimulating action on uterus and found Lycoris radiata Herb. acted very much like ergot. Moreover, when the decoction made from 1 gm of this drag was injected intramuscularly into a rooster's breast, the tip of the comb became blue after 1(1/2) hours. The decoction of Lycoris radiata Herb. stimulated the isolated rabbit ileum, and caused...

The pharmacological action of the bulb of Lycoris radiata Herb. is commonly known as an emetic and an expectorant. In this report, the authors further investigated the stimulating action on uterus and found Lycoris radiata Herb. acted very much like ergot. Moreover, when the decoction made from 1 gm of this drag was injected intramuscularly into a rooster's breast, the tip of the comb became blue after 1(1/2) hours. The decoction of Lycoris radiata Herb. stimulated the isolated rabbit ileum, and caused emesis in pigeons. On isolated guinea pig's uterus, the decoction of Lycoris radiata Herb. was not antagonized by benadryl. The authors suggest that it might be a good substitute for ergot preparations.

1、石蒜煎剂与石蒜生物鹼,对豚鼠及兔的子宫,不論离体与在体,都具有明显的兴奋作用,大剂量时可使离体子宫呈現强直性收縮。对大白鼠的未孕子宫則令其节律减少与松弛。在豚鼠子宫上証明,石蒜的兴奋作用不被苯海拉明所对抗。 2、石蒜煎剂能使雄鸡鸡冠呈变色反应。此种变色反应与組織胺所致者不同。 3、石蒜能兴奋家兔离体十二指腸,对鸽具有催吐作用。

Taking consideration of the feedback on the vertical motion due to the drag force and the cooling effect acted on the air by raindrops, a system of differential, equations for the vertical velocity, temperature difference between cloud and environment and the water content is introduced. The solutions are. analysed numerically, for five sets of different, parameters. , From the. analysis the effect of different intensity of precipitation, stratification, initial condition and environment are studied, and...

Taking consideration of the feedback on the vertical motion due to the drag force and the cooling effect acted on the air by raindrops, a system of differential, equations for the vertical velocity, temperature difference between cloud and environment and the water content is introduced. The solutions are. analysed numerically, for five sets of different, parameters. , From the. analysis the effect of different intensity of precipitation, stratification, initial condition and environment are studied, and it is further found that under the influence of precipitation process, the vertical velocity, temperature difference and water content in cloud are reduced very quickly, and the descending motion appeas rapidly first at the cloud base, then spreads upward. Thus, starting from the cloud base, the cloud dissipates rapidly. This resembles the observed process of the dissipation of a precipitating cloud.

本文考虑了降水过程中水滴对空气的拖带作用和降温作用,并考虑到含水量变化时,由于水滴对空气拖带力的变化,而对垂直运动产生的反馈影响,导出了局地积云的运动方程、热力方程和含水量方程,并由此研究在降水过程中云中空气垂直运动、云内外温差和含水量结构的变化。计算结果指出,局地积云在降水过程的影响下,云中空气的垂直运动、云内外温差和含水量都要明显变小,并且很快地由下向上逐渐出现下沉运动,云也由下向上逐渐消散。计算结果与实际观测现象是基本相似的。本文共做了五个不同条件的个例数值计算,并由此分析比较了不同降水强度、不同稳定度、不同云中初始条件和不同云外环境所起的不同作用。

 
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