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  low
    The Formation Mechanism and Quantitative Evaluating on the Low Resistivity Oil Bed of the Southern Songliao Basin
    松辽盆地南部阻油层形成机理与定量评价
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    A Study of the Percolation Mechanisms with Rock Deformation and the Application for Low Permeability Gas Reservoir
    渗气藏岩石变形渗流机理及应用研究
短句来源
    Mechanism Study on the Main Causes of Forming Low Resistivity Pay
    阻油层的主要成因机理研究
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    Pore Structure of Low Permeability Sand Rock and Fluid Flowing Characteristics
    渗砂岩储层孔隙结构与流体微观渗流特征研究
短句来源
    LABORATORY STUDY ON PETROLEUM SULFONATE SYSTEM WITH LOW INTERFACIAL TENSION
    界面张力石油磺酸盐体系的实验研究
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    Research of Residual Gas of Low-permeability Sandstone
    渗砂岩气藏剩余气分布规律研究
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    Study on the Fine Description Method for Wuerhe Low-permeability & Difficult Recovery Reservoir in Xinjiang Junggar Basin
    新疆准噶尔盆地乌尔禾油田渗难采油藏精细描述方法研究
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    Geo-macromolecular Structure of Organic Matter in Immature Source Rocks and the Mechanism of Immature Petroleum Formation
    熟烃源岩地质有机大分子结构与成烃机理研究
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    THE EFFECT OF PORE STRUCTURE ON WATER DRIVE EFFICIENCY IN THE MALIN OIL FIELD
    马岭渗油藏孔隙结构对水驱油效率的影响
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    EVALUATION OF ADSORPTION AND TRANSPORT COEFFICIENTS OF POROUS CATALYST IN FIXED-BED REACTORS BY TRANSFER FUNCTION METHOD
    传递函数法求取H_2在B-204变催化剂固定床反应器上的吸附和传递系数
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  low
The Balian-Low theorem (BLT) is a key result in time-frequency analysis, originally stated by Balian and, independently, by Low, as: If a Gabor system $\{e^{2\pi imbt} \, g(t-na)\}_{m,n \in \mbox{\bf Z}}$
      
The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number of Minimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.
      
This phenomena is related to the invariant cycles under the transformation We also give a characterization of all low-pass filters for MSF wavelets.
      
The main purpose of this paper is to give a procedure to "mollify" the low-pass filters of a large number ofMinimally Supported Frequency (MSF) wavelets so that the smoother functions obtained in this way are also low-pass filters for an MRA.
      
We also give a characterization of all low-pass filters for MSF wavelets.
      
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After analyzing the effects of flow distribution, mass and heat transfer on the repeatability of the results obtained from the testing trickle bed hydro-ogenation reactor and comparing the configuration of our 100ml reactors with foreign ones, as well as the method of catalyst loading, it is evident that our reactors are lower in both L_B/dp and liguid mass transfer speed, as compared with foreign ones. It is advisable to increase the catalyst loading in the 100ml reactors or to design new reator with relatively...

After analyzing the effects of flow distribution, mass and heat transfer on the repeatability of the results obtained from the testing trickle bed hydro-ogenation reactor and comparing the configuration of our 100ml reactors with foreign ones, as well as the method of catalyst loading, it is evident that our reactors are lower in both L_B/dp and liguid mass transfer speed, as compared with foreign ones. It is advisable to increase the catalyst loading in the 100ml reactors or to design new reator with relatively small diameter. By mixing the catalyst with inert particles, it is also possible to increase L_B/dp or to elimi-nate the effect of temperature gradient, thus improving the repeatability of the results.

分析了反应器内流体分布、传质和传热对实验数据重复性的影响,并对比了国内外反应器的结构特征和催化剂装填方式后,可以看出,国内常用的100毫升滴流加氢反应器的L_B/d_p和液体质量速度均偏.为了克服这种缺点,应增加现有内径25毫米的反应器的直径设计得小一些.用惰性粒子稀释催化剂床层,也可提高L_B/d_p或消除温度梯度的影响,有利于提高数据的重复性.

An analysis is made in the paper of the theoretical basis on which the crude oil of high pour point and high viscosity is transported by low viscous liquid jacket. Such way of transportation s satisfactorily successful on the trial pipeline, and the various factors that affect liquid jacket flow are analysed on the basis of experiment.

本文分析了粘液环输送高凝、高粘原油的理论基础,并在试验管道上成功地实现了高凝原油的粘液环输送。在试验的基础上,分析了影响液环流动的各种因素。

The paper presents the experimental results of synthesizing petroleum sulfo-nate with low interfacial tension, using the fraction oil from the paraffin-base crude oil in Daqing Oilfield.

本文论述了应用大庆石蜡基原油的馏分油合成界面张力石油磺酸盐的实验结果.研究了张力石油磺酸盐的结构、活性剂的平均当量和当量分布、电解质的浓度、助剂的种类和用量等对界面张力体系的影响.得出,随着石油磺酸盐平均当量的增加,最佳含盐量下降.根据大庆油田矿化度的特点,石油磺酸盐的平度均当量为380~450较合适,并且当量分布范围应较宽.在特定的电解质浓度范围内,获得了超界面张力(10~(-2)~10~(-3)”达因/厘米)的活性刑配方.这些配方还显示出随增溶参数增加而界面张力降的特性.当加入醇时,随着醇量的增加,最佳含盐量下降.

 
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