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The results indicated that CHCl3 was optimum reagent and the reaction temperature was better controlled at 10~15℃. Dinitrogen tetraoxide and nitric acidhad a detrimental effect on the yield and purity of 1,2-propanediol dinitrate. When the concentrations of dinitrogen tetroxide and nitric acid were below 1.00% and 5.53% respectively, these detrimental effects could be neglected. Under the optimum conditions, the yields and the purity of 1,2-propanediol dinitrate were 99.01% and 95.89%, respectively.
同时考察了反应溶剂、反应温度、N_2O_5中N_2O_4和HNO_3杂质对1,2-丙二醇二硝酸酯收率和纯度的影响,结果表明,适宜的溶剂是CHCl3;适宜的反应温度为10~15℃;在适宜条件下,1,2-丙二醇二硝酸酯的收率和纯度可分别达到99.01%和95.89%;N_2O_4和HNO_3对产物的收率和纯度均有不利影响,但当N_2O_5中N_2O_4含量小于1.00%,HNO_3含量小于5.53%时,对产物收率和纯度的影响不大。
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A method of multi-level fuzzy synthetical evaluation of effects of human errors on inspection quality is presented and the corresponding theoretical model of inspection quality and probability of detection are set up by using fuzzy set theory. The problem of human errors effect on inspection quality is solved successfully.
由于在实际的检测中,人对检测质量的影响包含了许多模糊不确定的因素,因此,在这部分分析中,运用模糊数学的基本理论,对平台结构检测中人的各种因素对检测质量的影响,进行了多级模糊综合评估,对不同等级的检测人员分别建立了相应的检测质量及探测概率分析的理论模型,较为成功地解决了人的失误对检测影响的问题。
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Among the influencing factors, thermodynamic property, temperature and velocity of the feed can affect mass transfer coefficient significantly, pH of the wastewater is a significant influencing factor for the treatment of high strength ammonia wastewater.
膜吸收法的影响因素众多,其中料液的热力学性能、温度和流速对传质系数的影响较大;在高氨氮废水的处理中,料液的pH是显著性影响因素。
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1St, foreword main point: A, about Earth's internal heat circulation as well as successional variation process three important times: Birth time, lifeless time, until has the life time; B, the earth interior stone fruits archery target thermonuclear reaction, causes the earth interior material convection and the Earth revolve production as well as terrestrial magnetic field production three between relations; C, also has in has the life time, the vital activity to the entire internal heat circulation influence as well as to the earth's atmosphere influence; D, has the life time, in the stratum the coal and the petroleum, the natural gas and so on the fixed energy storage which as a result of energies and so on zoology and botany absorption transformation sunlight forms, to Earth internal heat circulation influence as well as with earth's crust each kind of movement relation, such as: The plate movement, the volcanic earthquake, the orogenesis, the Earth moves the fierce degree the periodic phenomenon and so on.
前言要点: A 、关于地球的内热循环以及演变过程的三个重要时期:诞生时期,无生命时期,直至有生命时期; B 、地球内部核物质的热核反应,引起的地球内部物质对流与地球旋转的产生以及地球磁场的产生三者之间的关系; C 、还有在有生命时期,生命活动对整个内热循环的影响以及对地球大气的影响; D 、有生命时期,地层中煤与石油、天然气等由于动植物吸收转化太阳光等能量而形成的固定能量存储,对地球内热循环的影响以及与地壳各种运动的联系,诸如:板块运动,火山地震,造山运动,地球活动剧烈程度的周期性现象等。
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Heating billet temperature cannot be detected in the hearth. Only by detecting temperatures of the stove side or hearth with estimation from mere experience could lead to great error on the measurement of billet temperature and affect the quality of post-processing accordingly; Overheating also exists in the heating process, and the quality of product is sway by overheating oxidation. Though infrared thermoscope is used to detect the temperature of billet when it is taken out of the stove, precision is still affected because of the oxide layer on the surface.
燃气与空气的配气量比例,一般通过人工调节,未实现按加热条件自动动态调节;无法在炉膛内检测被加热钢材的温度,只能通过检测炉壁或炉膛温度,再凭经验估计钢材温度,结果是钢板温度误差大,影响后续加工质量;钢材加热存在表面过烧现象,有时表面烧损、氧化严重,影响产品质量;尽管钢材出炉时,可用红外线测温仪来进行钢材表面温度检测,但因钢材表面存在氧化层,也影响钢材温度检测精度。
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The inactivation efficiencies of spark gap switch pulse source and thyratron pulse source matched with reactors were compared. In addition, the effects of humic acids on both PEF and NTP inactivation were studied. The results revealed that the NTP was more prone to be affected by organic compound.
其次,以饮用水为研究对象,系统的考察了PEF和NTP消毒时,单脉冲能量的影响和连续流条件下的杀菌效果,比较了火花隙开关电源和闸流管开关电源与反应器匹配的杀菌效果,研究了天然水体中存在的腐殖酸对PEF和NTP杀菌效果的影响,结果表明水中的有机物对NTP杀菌的影响很大。
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The effect of different factors such as the effect of different loads of traffic lane、 the form of lateral brace、 non-orientedly conservative loadings of the hanger and tie bar etc is discussed. The different coefficients of stability of changing these factors are given, so that the factors that are vital to the stability of arches are found.
分别考虑了不同荷载条件、不同风撑形式、吊杆和立柱的保向力、拱肋和横撑的刚度以及拱脚的边界条件等对青干河大桥成桥阶段空间稳定性的影响,并列出了这些影响因素的改变对稳定安全系数的影响。
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This thesis conclude 4 parts: 1 、 The change and effecting factors of plasma adiponectin level in old subjects with abnormal glucose tolerance; 2、 The distribution of adiponectin receptors in Wistar rat; 3、 The effect of fat-fed and pioglitazone on mRNA expression of adiponectin with its receptors...
本研究共包括以下四部分内容:1、老年糖耐量异常人群中脂联素的改变及其影响因素;2、脂联素受体mRNA在Wistar大鼠体内的分布;3、高脂饲养以及吡格列酮对大鼠脂肪组织脂联素及其受体表达的影响;4、吡格列酮对不同浓度脂肪酸培养的HepG2细胞脂联素受体mRNA表达的影响。
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The result of this Structural Equation Model shows money attitude and risk tolerance scale, using saving as an independent variable showed that there was no significant influence among them; using debt as the independent variable, the power/Prestige factor has significant influence. In other words, people who tend to see money as the solution to problems are more likely to borrow. In addition, Power/Prestige factor (people who tend to see money as the solution of problems), Retention/Time factor (people tend to perceive that they budget their money.) and high risk tolerance factor has significant influence on investing.
实证结果显示,金钱态度与风险容忍度对储蓄与否均无显著影响,金钱态度中的权力/名望对借贷者行为有影响:倾向将金钱视为解决所有问题的方法的人较易有借贷行为;此外,金钱态度中的权力/名望、保留/时间二项因素以及风险容忍度对投资行为有显著影响:越将金钱视为解决问题的方法以及金钱时间观念重的人,也就是意识到将来老年生活或是未来金钱来源者,以及对於风险容忍度高的人倾向从事投资。
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The results show that the conversion of toluene is effected by the temperature and resid...
研究结果表明,甲苯转化率受温度和停留时间的影响较大,尤以温度影响更为明显;主产物选择性受温度和停留时间的影响较小,但停留时间延长,会加剧苯甲醛向苯甲酸转化。
- 推荐网络例句
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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.
Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。
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I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.
我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。
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The shamrock is the symbol of Ireland and of St.
三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。