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An environmentally benign method for the synthesis of heteropoly acids H3+nPMo12-nVnO40·xH2O (PMoVn, n = 1-3) was developed by the reaction of an aqueous slurry which contained stoichiometric amounts of MoO3, V2O5 and H3PO4.
      
Development and demonstration plant operation of an opposed multi-burner coal-water slurry gasification technology
      
The ions adsorbed on NSTD can be on-site directly determined with fluorination assisted electrothermal vaporization inductively coupled plasma atomic emission spectrometry (FETV-ICP-AES) without elution through slurry sampling.
      
Slurry sampling followed by electrothermal vaporization (ETV) was used as sample introduction technique in inductively coupled plasma atomic emission spectrometry (ICP-AES) for the direct determination of trace elements in food samples.
      
Determination of lead and cadmium by atomic absorption spectrometry coupled with slurry sampling of carbonized samples: Use of p
      
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Nine adsorbents and 139 solvent systems were studied for the adsorption thin layer chromatographic separation of digitalis glycosides, but only partial separation was ob- tained. Better results were observed with partition thin layer chromatography. The glass plate (18×5cm) was coated with a slurry of 1.3 g kieselguhr, 0.2 g gypsum, and 6.3 ml water, dried for 1 hr at room temperature and 1 hr at 120℃.The plate was then developed with a solution of 1.5 g formamide in 10 ml acetone or sprayed with a 10%...

Nine adsorbents and 139 solvent systems were studied for the adsorption thin layer chromatographic separation of digitalis glycosides, but only partial separation was ob- tained. Better results were observed with partition thin layer chromatography. The glass plate (18×5cm) was coated with a slurry of 1.3 g kieselguhr, 0.2 g gypsum, and 6.3 ml water, dried for 1 hr at room temperature and 1 hr at 120℃.The plate was then developed with a solution of 1.5 g formamide in 10 ml acetone or sprayed with a 10% formamide solution in acetone, in such amount as to make each plate hold 0.8-0.9 g formamide. Suitable amount of glycoside dissolved in chloroform-methanol mixture (1:1) was applied to the plate, and the chromatogram was developed with a formamide-saturated solvent; when the solvent reached the top, the plate was taken out and heated for 20 min at 120℃ to remove formamide, then sprayed with 50% sulphuric acid immediately, the glycosides were seen as differently coloured spots. The following solvent systems gave the best separation: Chloroform-acetone-ethyl acetate-formamide (5:2:3: saturated) ; chloroform-acetone-ethyl acetate-ethanol-formamide (8:2:0.5: 0.5: saturated) ; chloroform-benzene-ethyl acetate-formamide (1:2: 3: saturated) ; chloroform-butylalcohol-formamide (9:1: saturated).

选用了九种吸附剂,加或不加硫酸钙粘合剂,分别制成吸附薄层,先后筛选了139种展开剂系统,希望分离洋地黄叶中12种主要强心甙,但结果只能部分分离,效果不够理想。最后采用了分配薄层层离法,在硅藻土薄层上,以甲酰胺作固定相,成功地分离了各种强心甙,所得色点清晰集中,R_f值距离大.较好的展开剂系统有氯仿-丙酮-醋酸乙酯-甲酰胺(5:2:3:饱和);氯仿-丙酮-醋酸乙酯-乙醇-甲酰胺(8:2:0.5:0.5:饱和);氯仿-笨-醋酸乙酯-甲酰胺(1:2:3:饱和);氯仿-丁醇-甲酰胺(9:1:饱和)等.所用显色剂为50%硫酸,显色后各种强心甙及甙元呈现不同颜色,有助于鉴别.

Sluicing-Siltation is a new method of dam construction developed by the working people of Shensi and Shansi provinces in the course of the regulation of the Yellow River after Liberation since 1949. It has the advantage of getting greater, faster, better and more economical achievements. At present, this method of dam construction has found wide use ill the middle reaches of the Yellow River. In our Graduation Practice we have carried on in an open door way research work relating to the problem of slope stability...

Sluicing-Siltation is a new method of dam construction developed by the working people of Shensi and Shansi provinces in the course of the regulation of the Yellow River after Liberation since 1949. It has the advantage of getting greater, faster, better and more economical achievements. At present, this method of dam construction has found wide use ill the middle reaches of the Yellow River. In our Graduation Practice we have carried on in an open door way research work relating to the problem of slope stability of Sluicing-Siltation dams. We, in cooperation with the concerned units, made observations of Chu-Yu prototype testing dam in the Shansi Province and at the same time carried on laboratory experiments and computational analyses. In this paper, through the comparison of the actually measured data of porewater pressure of the dam body of the testing dam with the results of the theoretical com -putations, it is proved that, by applying the theory of consolidation of saturated soil mass to the analysis of porewater pressure of Sluicing-Siltation dam, results which satisfactorily agree with those of the prototype can be obtained. On this basis, by using an electronic computer we have found the distribution of porewater pressure in the dam body under varied boundary conditions, with various kinds of soil, rates of construction work, dam-slopes and dam-heights. Tables of the average porewater pressure coefficients above different elevations are prepared for use in computations. In the present paper, by using the results of triaxial shear test of the consolidated soil slurry, the characteristics of the value of effective strength parameters c' and φ'of normally consolidated soils are analysed, and practical values of c' and φ' for the hydraulie fill soils ordinarily used in the loess region are suggested. At last, according to the characteristics of hydraulic fill soils, two simplified methods based on the theory of effective stress are recommended for analysing the slope stability.

水坠坝是解放以后陕晋两省劳动人民在治黄中创造的一种新的筑坝方法。具有多、 快、好、省的优点,目前这种筑坝方法已在黄河中游地区普遍推广。 水利系水工2班工农兵学员,在毕业实践中,围绕水坠坝边坡稳定问题,开门搞科 研,与协作单位一起在山西曲峪试验坝进行原型观测,同时进行室内试验和计算分析。 本文通过用试验坝的坝体孔隙水压力实测资料与理论计算进行对比,证明饱和土体 团结理论用于水坠坝的孔隙水压力分析,可以得到符合实际情况的结果。在此基础上, 用电子计算机计算出各类边界条件、各种土质和施工速度、不同坝坡和坝高时坝体的孔 隙水压力分布,并做成各高程以上的平均孔隙水压力系数表,以供计算查用。 文中应用泥浆固结土的三轴抗剪强度试验成果,分析正常固结土的有效强度指标 C'、φ'值的特点,并对黄土地区常用的冲填土料提出实用的C'、φ'值。 最后部分,根据冲填土料的特性,提出两种建立在有效应力原理基础上的简易边坡 稳定分析方法。

Following the work on gas lift reactor (Pachuca tank) for gas-liquid-suspended solid 3-phase reaction, multideck gas lift reactors have been developed. This type of reactor has many unique advantages such as achieving of counter-current operation between gas and slurry, decreasing of gas consumption and small amount of volatile component of liquid required to recovery from the exit gas.

本文发展了多层气提式气、液、固三相反应器。研究了它的溢流管的稳定性,测定了液泛速度,并建立了一个计算液泛速度的经验方程式。 在连续流动的多层气提式反应器中进行了氨性溶液浸取氧化铜矿及碳酸化浸取钢渣提钒的试验。在间歇实验的基础上可以利用CSTR模型模拟连续流动的实验结果。 这种装置已成功地应用于工业性生产试验的设备上。

 
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