查询词典 pumping-back method

The dynamics of the beam pumping well system can be described in a more realistic way by solving the combined models,and hence a method for studying motion and forces of the beam pumping system driven by different types of motor is provided.

将这些数学模型联立求解，可更真实地描述抽油机井系统的运动规律，从而提供了一种研究不同特性电机驱动下抽油机井的运动和受力的方法。

According to this exact analytical expression,the effect of every part of a beam pumping unit on crank axle torque can be quantitatively studied. This method can be used to analyze all types of beam pumping units.

利用该解析式可以定量地分析游梁式抽油机各部件对曲柄输出轴扭矩的影响，准确地进行游梁式抽油机的平衡分析和设计计算。

ABSTRACT:In order to raise the power factor of distribution system with 1140V for oil-pumping units based on the analyzing the load performance , operation state ,existing problem and influence factor of oil-pumping units ,a reactor controlled reactive power compensation equipment has been developed .And The technology character ,using method and applying example have been introduced in detail

为提高油田采油系统1140V供电系统的功率因数，在对油田抽油机负荷特点和运行状态，以及抽油机电动机无功补偿的存在问题，影响因素等进行详细分析基础上，研制了一种用电抗器控制无功的无功功率动态补偿箱，并详细介绍了补偿箱的技术特点，使用方法和实际应用情况。

Through analysis to the pumping unit's load characteristic, the relationship between the position of the suspension point load's peak value and the oil well's parameters has been obtained and a new method about the transforming of the pumping unit with downward beam balance weight is proposed.

分析常规游梁式抽油机的载荷特性，得出悬点载荷的峰值出现的位置与井况参数的关系，提出一种下偏杠铃抽油机改造方法，依据油井抽汲参数调节下偏杠铃的角度，使其最大力臂与悬点最大载荷对应，提高抽油机的平衡效果。

For sucker rod pumping system, it commonly used the explicit difference method to evaluate a rod pumping performance.

对石油开采中的有杆抽油系统，通常采用显式差分法进行求解。

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无论里根是演员还是总统，[04：35.09]都在80年代留下了无法抹灭的印记。[04：39.15]satellite："卫星"，[04：40.81]在歌词中指的是"orbital satellites轨道卫星"，[04：44.80]这暗指里根时代的 star wars "星球大战"计划，[04：49.21]此计划在克林顿被停止执行）[04：53.80]skinny leather ties：是80年代在欧美国家风行的装束，[04：57.75]男孩们都喜欢戴着细条长的皮质领带，[05：00.89]尤其受到乐队的乐手们的宠爱。

I wonder if I could, Go back to old Hollywood When presidents dropped blonde bombshells Instead of creating their lives to hell The way we're living makes no sense Take me back, take me back To the age of innocence I wanna go back then Take me back, take me back To the age of innocence Back to the age of innocence I wanna get older, don't fight my age Take me back to those simpler days I wonder how it all happened I wanna get older, don't fight my age Don't wanna be the page on the scalpel's blade So please tell me, please tell me What ever happened?

我想如果我能，回到旧好莱坞当总统下降金发弹壳而不是创建自己的生命地狱我们的方式生活是没有意义的带我回家，带我回家无罪的年龄我想回去，然后带我回家，带我回家无罪的年龄回到纯真时代我要变老，不要打我的年龄带我回到那些简单的日子我不知道这一切是如何发生的我要变老，不要打我的年龄不想放在手术刀刀片页所以，请告诉我，请告诉我没有发生什么？

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

The revised Hargraves formula has the best result compared with Penman-Monteith formula, the average relative error is 6%, moreover, Hargaves method requiring the least data in calculating ETo, so this method has the high actual application value; The following are Radiation method and Blaney-Criddle method ; The worst is the Pan method, even after revised, the highest and average relative error is 36% and 10%, respectively. So, in this study, Penman-Monteith method, Radiation method, Blaney-Criddle method and Hargraves method are used except Pan method.

在这四种方法中，修正后的Hargraves方法与彭曼—蒙特斯方法的计算结果符合最好，其平均相对误差为6％，而Hargraves方法需要的气象数据只有计算时段的最高、最低温度，该方法具有较高的实际应用价值；辐射方法和布兰尼—克里德尔方法次之；蒸发皿方法最差，即使在修正后，E601型蒸发皿的最大误差也高达36％，平均为10％，所以在预报系统的研究设计中采用了除蒸发皿方法之外的四种方法。

The primary studying works and characteristics:1 To summarize reinforcing theory of cement mixing pile composite foundation2 To analyze the primary mechanics characters and changing rules of cement mixing pile, based on analysis of test data both indoor and outdoor.3 To discuss siding frictional resistance, ending resistance, ultimate bearing capacity of simple mixing pile and effectiveness factor of grouped piles, loading ratio of soil between piles under cushion cap of grouped piles and stress ratio of pile and soil and so on, and use many computation method and experimentation method to ensure bearing capacity of mixing piles composite foundation.4 To point out and analyze eight sides flaws and problems of the bearing capacity calculation method of mixing pile compositefoundation which ensured by national and normative method/ formula.5 To apply test results of loading tests and a few settlement observation data, use gray theory to predicate ultimate bearing capacity of deep mixing piles, actual example demonstrate engaging between theoretical predicted value and actual value.6 To apply groovy layerwise summation method to discuss entity piles method, double foundation method, equivalent layerwise summation method and consolidation theoretical method and so on, especially by combination of engineering example, use FEM to calculate or discuss the settlement and changing rules of composite foundation.7 To discuss problems of critical length of composite foundation by combination of engineering example and numerical analysis method, and analyze the contrast of critical length between simple pile load and most area load of composite foundation, not only critical length of composite foundation is relative to modulus ratio between piles and soil, but also upside load distribution area of composite foundation.

主要的研究工作与特色为：(1)总结了水泥搅拌桩复合地基的加固原理；(2)在对室内外试验资料进行统计分析的基础上，系统分析了搅拌桩水泥土的主要力学特性及其变化规律；(3)探讨了搅拌单桩的侧摩阻力、端阻力、极限承载力及群桩效率系数、群桩承台下桩间土荷载分担比及桩土应力比等，提出用多种计算方法并结合试验方法来综合确定搅拌桩复合地基的承载力；(4)明确指出和分析了按国家有关规范的方法确定搅拌桩复合地基承载力所存在的八个方面的缺陷与问题；(5)利用过去没有加载至破坏阶段的载荷试验成果和较少的沉降观测数据，尝试了用灰色理论预测深层搅拌桩的极限承载力，实例表明理论预测值与实测值吻合较好；(6)在常规分层总和法的基础上，探讨了复合地基沉降计算的实体墩基法、双层地基法、等效作用分层总和法、固结理论法等，特别是结合工程实例，用有限元数值计算等方法计算和讨论了搅拌桩复合地基的沉降及其变化规律；(7)结合工程实例，用数值分析方法探讨了复合地基临界桩长的问题，指出和分析了单桩荷载下的临界桩长与复合地基大面积荷载下的临界桩长存在很大的差别，复合地基的临界桩长不仅与桩土模量比有关，而且与复合地基上部荷载分布面积有关。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。