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过量系数
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  excess coefficient
     The adiabatic temperature (T_(ad)) of reaction 3Mg(l)+B_2O_3(l)=3MgO(s)+2B(s) will decrease with the increase of the excess coefficient of B_2O_3 in the thermal reduction of B_2O_3 with magnesium.
     随B2O3过量系数γ的增加,Mg热还原B2O3反应3Mg(l)+B2O3(l)=3MgO(s)+2B(s)的绝热温度(Tad)降低.
短句来源
     Following optimal operation conditions are found through orthogonal tests: the excess coefficient of added precipitator 1.2~1.3, the pH value at the reaction end 3~4, the reaction time 30min and the reaction temperature 50℃.
     通过正交实验 ,找出了提取草酸的优化操作工艺条件 :沉淀剂的加入过量系数为 1 2~ 1 3 ,反应终点pH值 3~ 4 ,反应时间 30min ,反应温度 50℃。
短句来源
     3. For wet process phosphoric acid (WPA) technology, the optimum conditions are that: Temperature is 75±3℃, the excess coefficient of sulfuric acid is 1.05, liquid to solid ratio 2.5:1, time consumption is 3 hours.
     3.浸出工艺 二水物法萃取P_2O_5最佳工艺条件:温度75±3℃,酸过量系数1.05,固比2.5∶1,反应时间3h。
短句来源
     The result shows that the influence of the conditions of synthesizing nano-carrier Al_2O_3 on apertures distribution of carrier follows the sequence: ageing time, NH_4HCO_3 excess coefficient, reaction temperature, charging-up way, and Al~(3+) concentration.
     结果表明,纳米载体Al2O3的合成条件对其孔径分布的影响顺序依次为陈化时间、NH4HCO3的过量系数、反应温度、加料方式及Al3+浓度.
短句来源
     The experiment results showed that: in acid pickling process, when reaction temperature is 100℃, the leaching time is 2.5h, mixing speed is 400r/min, the sulfuric acid density of solution is 45% and excess coefficient of sulfuric acid is 1.5, recovery rate of iron from hematite is 82.3%.
     实验表明:在酸浸过程中,当反应的温度为100℃,浸出时间为2.5h,搅拌转速为400r/min,溶液硫酸浓度为45%,硫酸过量系数为1.5时,对铁矿中铁回收率可达82.3%。
短句来源
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  excessive coefficient
     The transform ratio of sulfur can reach 83.3% when the sulphuric excessive coefficient is 1.1 and the time is 90 min.
     在加硫磺反应中,当过量系数为1.1和时间为90min时,硫向硫代硫酸钠的转化率能达到83.3%。
短句来源
     When FeSO_4, N_2H_4 and Na_2S with the excessive coefficient of 1.0,2.0,1.0 respectively are used to remove arsenic and antimony, the removal ratio of arsenic are 70.0%,50.0% and 60.0%, separately; the removal of antimony can reach 96.7%, 95.6% and 96.7%, respectively.
     而采用硫酸亚铁、水合肼和硫化钠3种试剂脱除砷和锑,过量系数分别为1.0,2.0和1.0时砷的脱除率分别为70.0%,50.0%和60.0%,锑的脱除率分别为96.7%,95.6%和96.7%;
短句来源
     By inputting a certain amount of brown gas into oil burner and applying it to waste incineration, some distinguish features reached: 1)minimal air excessive coefficient reached: a < 1. 05;
     将一定量的布朗气加入到燃油燃烧器,应用于危险废物焚烧助燃,具有突出的减排效果:1)空气过量系数a<1.05;
     The technological conditions of digesting Hefeng phosphate rock with sulphuric acid were studied. The effect of sulphuric acid excessive coefficient,liquid-solid ratio,agitation speed,reaction temperature,reaction time on P_2O_5 conversion ratio were tested.
     对硫酸间隙分解鹤峰磷矿的工艺条件进行了研究,考察了硫酸过量系数、液固比、搅拌转速、反应温度、反应时间等对P2O5转化率的影响。
短句来源
     CaO2 was synthesized at room temperature from Ca(OH)2 and H2O2 with the addition of stabilizer. The effects of the amount of water added, reaction time,the amount of stabilizer, the excessive coefficient of Ca(OH)2 on the purity and yield of the product were studied, and the optimum process condition was determined. The stability of the products was tested.
     以Ca(OH)2 和H2O2 为原料 ,通过添加稳定剂 ,实现了过氧化钙的常温合成 ,并研究了加水量、反应时间、稳定剂用量、Ca(OH)2 过量系数等因素对产品纯度和产量的影响 ,确定了最佳工艺条件 ,并对该产品的稳定性进行了测试
短句来源
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  excess ratio
     The results showed that TBHQ with purity of 99.1% and recovery more than 70% was synthesized from tert-butyl al-cohol and hydroquinone under atmospheric pressure, when excess ratio of tert-butyl alcohol was 130% and the reaction was catalyzed by 85% H3PO4 for 5-6 hours. Re-crystallization was adapted to purify the synthesis product.
     结果表明,常压下以叔丁醇和对苯二酚为原料合成邻叔丁基对苯二酚,叔丁醇的过量系数为130%时,以85%的浓磷酸为催化剂、在130℃的温度下反应5—6h,采用重结晶法精制工艺,可以制备出纯度为99.1%的邻叔丁基对苯二酚,而且产品收率可达70%以上。
短句来源
     The results showed that TBHQ with purity of 80 % and yield more than 30% was synthesized from tert- butyl alcohol and hydroquinone under atmospheric pressure, when excess ratio of tert - butyl alcohol was 160% and the reaction was catalyzed by 85% H3PO4 for 2. 5 hours under the temperatuer of 130. Recrystallization was adapted to get the fine product.
     结果表明,常压下以叔丁醇的过量系数为160%时,以85%的浓磷酸为催化剂,在130℃的温度下反应2.5 h,采用重结晶法精致工艺,可以制备出纯度为80%的TBHQ,而且产品收率可达30%以上.
短句来源
     The experiment results showed the working temperature, gas pressure and air excess ratio affected the stack performance remarkably. The influences of the hydrogen excess ratio, anode and cathode humidity in the range of 60% to 100% were less.
     实验结果表明:电堆性能受工作温度、气体压力和空气过量系数影响较大,而氢气过量系数以及阴、阳极湿度在60%~100%时对性能的影响较小。
短句来源
  “过量系数”译为未确定词的双语例句
     When the air-staged proportion is 80~90 %, primary zone length is 3~3.5m and excess air coefficient is 1.3-1.5, the comprehensive effect is good.
     当空气分级比在80~90%,一级燃烧区长度在3~3.5m以及空气过量系数为1.3~1.5时,综合效果较好。
短句来源
     When the natural gas proportion is 10~20%, reburning zone length is 2m~4m and excess air coefficient of reburning zone is 0.8~0.9, the comprehensive effect is good.
     当再燃量为10~20%,再燃区长度为2~4m以及再燃区空气过量系数为0.8~0.9时,综合效果较好。
短句来源
     This paper studies the influence of coal volatile compositions (CH 4,C 2H 2 and C 2H 4) and the reburning conditions (excess air and temperature) on NO x reduction in the reburning zone. A simulated flue gas from the first combustion zone consisting of CO 2(16.8%),O 2(1.95%),NO(0.1%) and balance gas N 2 was used.
     以成分为 CO2 =16.8% ,O2 =1.95% ,NO=0 .1%和平衡气体 N2 组成的模拟烟气为对象 ,研究不同挥发分组分 ( CH4,C2 H2 和 C2 H4)作为再燃燃料时 ,再燃工况(空气过量系数和再燃温度 )对 NOx 还原过程和还原率的影响。
短句来源
     The results show that, with silicon-aluminum alloy powder as reductant, when reduction temperature is 1 453 K, reduction time is 2 h, briquetting pressure is 35 MPa, excess reductant is +5%, the magnesium reduction degree can reach 43%, and the purity of the magnesium metal can reach 98%.
     结果表明,以硅铝合金粉为还原剂,在还原温度为1453K、还原时间为2h、制团压力为35MPa、还原剂过量系数为+5%时,金属镁的还原率可达43%,纯度达到98%.
短句来源
     With the gases in a typical primary combustion zone serving as simulation gases the authors have studied the influence of different gaseous fuels (CH 4, C 2H 2 and C 2H 4) and the reburning zone combustion conditions (excess air coefficient and reburning temperature) on NOx reburning process and its reduction.
     本文以典型的一次燃烧区烟气成分为模拟烟气,研究了不同的气体燃料(CH4,C2H2和C2H4)作为再燃燃料时,再燃区燃烧工况(空气过量系数和再燃温度)对NOx再燃过程和NOx还原率的影响。
短句来源
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  excess coefficient
The distributions of the induction (B) vector directions and the estimates of the variance and excess coefficient of the vector components are presented.
      
The effects on ignition length of fractional composition of coal dust, hot air temperature, primary air excess coefficient, degree of mixing of primary and secondary air, and heat fraction of gas in a mixture of fuels are investigated.
      
The excess coefficient of thermal expansion is positive for the four binary systems.
      
  excessive coefficient
A somewhat excessive coefficient of voltage, of up to 10%, enables us to control the conductivity of such a resistor by superimposing on it a transverse control field.
      
  excess ratio
A 92% yield of 2 with 94% enantiomeric excess ratio was attained in phosphate-buffered saline (PBS) (pH 7.5) by using glucose as a nutrient at 37°C for 12 h.
      
Potential impurities such as nitrate, sulfate, nitrite, fluoride, formate, phosphate and oxalate were detected up to an analyte-to-excess ratio (ATER) of 1:3 · 105 using an online two-dimensional isotachophoretic system.
      
We calibrated the colour excess ratio in terms of the central depth of the VBS.
      
In the most Sr-deficient/Bi-excess ratio of 0.55/2.3, the maximum values of Qm were obtained approximately 1013 and 3325 for SBT and SBN, respectively.
      
A measure of the proportion of phylogenetic information contained within the data set (Homoplasy Excess Ratio, or HER) revealed that the character states were significantly non-randomly distributed among the ten taxa (HER = 0.71, p >amp;lt; 0.01).
      
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Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should...

Due to the absence of common understanding among the naval architects,engine-builders and marine engineers,about the definition of marine diesel engine power rating,difficulties aroused by power deficiency in diesel-installations on board were frequently eneountered in service.This paper deals with diesel engine power rating from manufacturing and service point of view.The manufacturers should rate their engines into three ranks:maximum rating,nominal rating and over-nominal rating. The marine engineers should rate their auxiliary engines into two ranks,namely,normal service rating and overload rating,and their main propulsion engines into trial trip rating,maximum service rating and normal service rating.Scientific definifion of these ratings are explained and their empirical relati- ons are also given. The bases of nominal rating are standard ambiant atmospheric conditions and installation condi- tions.The author proposes that standard ambiant atmospheric conditions should be based on the mean conditions in the test shop of the most diesel engine factories throughout the country.However,the naval architects should rate their engines according to the particular conditions of the appointed navigation zone and the kind of service to be attained.Numerical data of ambiant atmospheric conditions and installation conditions proposed are:736mmHg.,20℃,70% humidity,and less than 150 mm WG vacuum in the intake air system,30~300mmHg back pressure in the exbaust system.The calculation method in practice for correcting nominal rating and specific fuel consumption according to the variations of ambiant atmospheric conditions differ largely one another.For non-supercharged diesel engines,new correction formulas according to constant fuel pump rack and constant fuel/air ratio respectively are recommended in the paper.The results of comparison of these proposed fornmlas with others in practice and also with published test data show that the recommended formulas are more reasonable,although the correction is still slighly too high. The ambiant conditions on board differ largely with those in test shop,so the determination of service rating depends upon the specification of ambiant atmospheric conditions in the machinery compartment.Three kinds of standard ambiant conditions in machinery compartment,for high sea,east- south sea and north sea-going ships respectively,are given in this paper.These numerical data are deter- mined by statistical method.In the determination of service rating,the influence of wear,rpm.,insta- bility and power reserve must be considered.Its empirical coefficients are introduced.Generally,the normal service rating for auxiliary engines is about 75~82% of the nominal rating from manufacturer and 70~99% for the main propulsion engines.

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计...

船用柴油机功率的定义在设计、制造和使用各方面缺少统一的理解,以致使用时常常出现柴油机功率满足不了需要的问题。本文提出船用柴油机功率分级应从制造及使用两方面分别加以考虑:从制造方面可分为最大功率、额定功率和超额功率三级;从船上使用方面,驱动发电机的付柴油机可分为持久功率及超额功率两级,而推进用的柴油机则应分为试航功率、最大使用功率和正常使用功率三级。本文给出了上述各种功率的科学定义和经验比例。额定功率的标定基础是标准大气条件和安裝条件,标准大气条件的选择原则应根据国内大部份柴油机车间的条件而定,而使用者別应根据具体航区和船的用途重新标定持久使用功率。本文建议的标准大气条件为736毫米汞柱,20℃和70%湿度,并提出进气系统真空度不超过150毫米水柱、排气背压应为30~100毫米汞柱。目前使用的各种额定功率及耗油率修正计算方法差别较大,本文对非增压柴油机分别按每循环供油量不变及燃烧空气过量系数不变两种情况提出了新的修正计算公式。运用本文介绍的公式计算结果与试验结果,比较表明本文建议的公式比较合理,但仍略偏于保守。船上机仓内的大气条件与工厂条件相差较大,投使用功率的选定应以机仓大气条件为准。作者根据统计提出适合在远洋、东南海及比海航行的三种船舶之标准机仓大气条件;同时推荐了在送定使用功率计算中为考虑磨损、转速不稳性及功率贮备等因素所采用的系数。对于发电用的柴油机船上使用功率一般为额定功率的76~82%,对于推进主机则为70~79%。近年来,在我国船舶上,通常发现由于各方面对船用柴油机功率标定缺少统一妁理解,往往引起柴油机的实际使用功率超出其能力,以致引起柴油机超负荷、螺旋桨转速或发电量达不到设计要求,严重的甚至会引起发动机损坏。柴油机功率按不同大气条件的修正亦常常引起制造厂与验收部门的争执。这些问题虽然在我国有关标准中已作了某些规定,但仍有继续探讨的必要。本文着重对额定功率与使用功率的关系、标准大气条件的确定以及功率和耗油率按大气条件变化的修正等问题提出一些看法。

This investigation deals with niobium extraction process based on the aluminothermic reductionof its pentoxide in an alumina-lined reactor. An improved charging method is adopted and thethermit reaction at roon temperature is initiated by lighting a fuse in the center of the charge.Reduction with 15 per cent of excess of aluminum over stoichiometric requirement and with about270×104 J/kg exothermicity of the charge reaction is found to be acceptable. The tests with 0.2to 1 kg batches of niobium pentoxide has...

This investigation deals with niobium extraction process based on the aluminothermic reductionof its pentoxide in an alumina-lined reactor. An improved charging method is adopted and thethermit reaction at roon temperature is initiated by lighting a fuse in the center of the charge.Reduction with 15 per cent of excess of aluminum over stoichiometric requirement and with about270×104 J/kg exothermicity of the charge reaction is found to be acceptable. The tests with 0.2to 1 kg batches of niobium pentoxide has resulted in high yields of niobium in a massive form.

采用五氧化二铌为原料,铝粉作为还原剂,通过改进装料方式,在三氧化二铝衬里的敞开反应器内,实现了直接室温点火还原。研究了还原剂过量系数、炉料发热量、还原规模对金属产率的影响。当每炉装料1kg、采用铝过量15%、炉料发热量为272×10~4J/kg时,金属产率高达98.5%。

The factors affecting the leaching process of stibnite in ferric chloride solution ware examined. With orthogonal experiments, the optimum leaching was obtained under the conditions: leaching temperature 95℃, leaching time 1.5h, proportion of liquid to solid (L/S) 6:1 and excess coefficient of ferric chloride 1.1. According to their significance to antimony leaching rate, the descending sequence of the above factors is temperature, proportion of liquid to solid, excess coefficient and time.

分析了FeCl_3溶液浸取辉锑矿(Sb_2S_3)的各种影响因素,并用正交试验设计法确定了该浸取工艺的最佳工艺条件:浸取温度95℃,浸取时间1.5 h,液固比6.0,FeCl_3过量系数1.1。影响锑浸取率的显著性顺序为:浸取温度、液固比、FeCl_3过量系数和时间。

 
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