查询词典 algebraic fraction

On the basis of the Washburn principle , the contact angles of various liquids such as deionized water, sodium chloride solution of mass fraction 0.05, ethanol and ethanol-water solution of volume fraction 0.15 on the sediment surface were measured by the JF99A contact angle meter with osmotic pressure method.

根据Washburn原理研制的JF99A型粉体接触角测量仪，是利用渗透压力法测定粉体的接触角。

After analyzing the performance anduncertainty of the DDPM vortex flowmeter in gas-liquid bubble flows, the vortexflowmeter-Venturi tube combinative method using the vortex flowmeter and the Venturi tube as measuring cells was put forward, the measurement model based on thevortex frequency and the Venturi differential pressure was established, and it showsthat the relative errors of this method for the mass flow measurement of bubble flowsare within±5%. Furthermore, the flowrate and volume void fraction of bubble flowswere obtained using a single DDPM vortex flowmeter through the relationshipbetween the frequency and amplitude of the circumferential DDPM signal, and resultsdemonstrate that the relative errors of the flowrate and volume void fraction of bubbleflows are within±5% and±10% respectively, which indicates the broad applicabilityof this method to large numbers of engineering fields.

通过分析管壁差压式涡街流量计在气液泡状流中的性能和不确定度，提出了以涡街流量计和文丘里管作为测量元件的&涡街—文丘里联合法&，建立了以涡街频率和文丘里差压为被测量的测量模型，该方法对气液泡状流质量流量的测量相对误差可达±5％；通过建立涡街周向管壁差压信号频率和幅度与被测流体的关系，使用单个涡街流量计实现了对气液泡状流流量和体积含气率的双参数测量，该方法对气液泡状流流量和体积含气率的测量相对误差分别为±5％和±10％，可以满足大量工业实际应用的要求。

From the point of view of structure,bamboo cell wall ratio,amount of bundle per unit area,fraction of bundle sheath,fraction of vessel increase from the root to the top of the bamboo,while fractionof parenchyma.Single bundle sheath area decreases with the increase of height.Fiber length,fiber width and vessel length increase from the root to the top andget theirs maximum value at the length of 17th node to 23rd node and thendecrease.Fiber length and width ratio slightly decreases while vessel widthincreases with the increase of height.

从构造角度来说，竹材胞壁率、单位面积维管束个数、纤维束比量、输导组织比量从基部到到梢部随着高度增加而增加，而薄壁组织比量、单个维管束纤维束面积随着高度增加而减小；纤维长度、纤维宽度、导管长度从基部到梢部随着高度的增加而增加，在第17竹节到第23竹节达到最大值，而后下降，纤维长宽比随着高度的增加而缓慢下降，导管宽度随着高度增加而一直增加。

Based on the above two experimental studies,we inferred the main combustion characteristic at high altitude which was that the flame radiation coefficient was obviously lower than that in atmospheric region and the mechanism which was due to higher volume fraction of carbon particles than that under atmospheric pressure.To validate this infer,the focus of last experimental study was on the volume fraction of carbon particles in the flame.

前两部分实验研究我们分析得到高原地区的主要燃烧特性是火焰辐射系数明显低于常压地区，其机理是由于火焰中的碳颗粒体积分数高于常压下的，为了验证这一推断，最后一部分实验研究的重点是火焰中碳颗粒的体积分数。

Make use of the master fraction of the Flash manufacture lesson piece, and character elucidation, test an etc., the Robo Demo 4 manufacture the video elucidation of the lesson piece fraction, make use of the Pro 2.1 sounds of the Cool Edit to carry on the edit pass type convert.

利用Flash制作课件的主体部分，以及文字说明、测试题等，Robo Demo 4制作课件的视频说明部分，利用Cool Edit Pro 2.1对声音进行编辑及格式转换。

Maintaining engine operating at constant load and varying the argon fraction in the intake charge, the influence of argon fraction in the intake charge on the performance of a closed cycle diesel engine was studied.

恒定柴油机负载，改变混合进气中氩气的含量，分析了进气混合气中氢气含量对闭式循环柴油机性能的影响。

To implement the high-quality Control for dryness fraction of steam-injection boiler, a control method of dryness fraction is presented.

为了实现注汽锅炉蒸汽干度的高质量控制，提出一种蒸汽干度控制方法。

The statistics of oil field production indicates that the dryness fraction of the steam heat boiler export is about 75% at present .While the dryness fraction of steam of the steamed well mouth is only about 60%, which affects the effect of steam huff and puff and the economy of thermal production.

油田生产统计情况表明，目前热注锅炉出口蒸汽干度一般在75%，而注汽井的井口蒸汽干度仅为60%左右，影响了蒸汽吞吐效果和热采的经济性。

The result shows before the dryness fraction drops to zero landing small changes, when dryness fraction becomes zero, the temperature falls quickly.

以杜84-馆平59水平注汽井测试数据为基础，建立了水平井井筒及油藏动态变化的解释模型。

The neutral/basic fraction was furthermore separated into 4 fractions using silica gel normal phase chromatography, and each fraction was then concentrated and analyzed using gas chromatography-mass spectrometry. In comparison with the pure standards and the retention indices reported in the literature, a total of 302 volatile compounds were identified in Changyu XO brandy, including 30 alcohols, 35 aldehydes and ketones, 20 carboxylic acids, 104 esters, 24 substituted benzenes and derivatives, 14 phenolic derivatives, 14 acetals, 16 furan derivatives, 22 terpenic and norisoprenoidic derivatives and 23 others.

实验先采用液-液萃取方法提取张裕XO级白兰地的挥发性成分，然后将酸性成分与碱性和中性成分分离，再采用柱色谱分离手段将其分离为若干个级分并浓缩，采用气相色谱-质谱、标准品比对、保留指数值比较等方法对分离得到的各级分中的成分进行了鉴定，在白兰地中共鉴定出302种挥发性成分，包括醇30种、醛酮类35种、酸类20种、酯类104种、苯同系物及其衍生物24种、酚类14种、缩醛14种、呋喃类16种、萜烯类22种和其他物质23种。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。