两管的

This article elaborated the construction principle of two pipe jacking methods——Sludge-liquid balance method and air-pressure balance method , introduced the main equipments used, discussed the construction technology and the treatment measures, then summarized and evaluated the construction effects as well as the merits and disadvantages.

本文结合工程实例，论述了顶管施工中泥水平衡顶管法和气压平衡顶管法两种顶管法的施工原理，对其主要设备及作用进行了简单介绍，对顶管施工中技术及问题处理措施进行了详细阐述，并对施工效果和两种顶管法施工中的优缺点进行了总结和评价。

After a simple retrospect of the development and application of the heat pipe, the working elements and the history and the actual state of the investigation inside the thermosyphon, a numerical model based on the previous experimental and theoretical studies is developed to simulate and analyze the process of the flowage and heat transfer in the condensator of the two-phase closed thermosyphon.

本文首先简单回顾了热管的发展及应用情况，介绍了热虹吸管的工作机理及其内部凝结换热的研究历史和发展现状，然后在前人实验和理论研究的基础上提出了本文的研究方向，建立了一个数学模型，对两相闭式热虹吸管冷凝段的流动和传热过程进行了数值模拟和理论分析。

This makes more and more people pay more attention to studies and applications of numerical simulation in thermal recovery. In this research, we have developed a reliable mathematical model for thermal recovery, which takes a full consideration of the effect of viscos, gravitical and capillary forces on the three-phase flow of gas, water and oil, the effect of the temperature on the medium characteristics of liquid and solid, the phase equilibrium of gas-liquid in each component, heat transportation including connection, conduction and radiation as well as heat losses in both the overburn and underlying strata. In the space discreation of the mathematical model, we have proposed a new method based on the improvement of the conventional nine-points difference approximation, which has a higher difference accurancy.

本项研究以热力采油的主要机理为基础，充分考虑在粘性力、重力和毛管力作用下油水气三相流动，考虑温度对各种流体和固体介质物性的影响，考虑每一组分中汽液两相的相平衡，考虑热在地层中的传导、对流和辐射以及上下盖层的热损失，利用热力学第一定律、质量守恒定律和流体迁移定律，建立了正确可靠的注蒸汽数学模型；在对数学模型进行空间离散时，利用控制有限体积积分法，对以往的九点差分近似作了合理的改进，使其具有较高的差分近似精度：结果表明，该公式的近似精度要比以往文献中所给的九点差分近似精度高，可以认为，在油藏数值模拟中，如果遇到非均质情况，使用这种九点差分近似更合理。

A standard expected value model for multi-objective multi-stage transmission planning is presented to realize the transmission optimal planning with the control of line overloading risks. In this model, a constraint of overloading risks is built with expected value and standard deviation of random line active power and two objectives are given as expected value of the average power loss and discount value of the investment cost. By modeling uncertain informations with probability theory, the probabilistic DC power flow is adopted for the correlated calculations among random variables in the planning model.4 A novel multi-objective transmission planning approach that considers transmission investment profit is proposed. Requests for transmission investment profit and social welfare are involved in the proposed planning approach.

以方案总投资费用贴现值和平均网损期望值为目标函数，建立多目标多阶段输电网规划的期望值模型，以线路有功潮流过负荷随机变量的期望值和标准差构建过负荷风险约束，考虑了风险发生概率和严重程度两方面的特征，通过对不确定性信息的概率建模，利用概率直流潮流进行各随机变量的相关计算，实现了控制过负荷风险条件下的输电网优化规划。4提出考虑输电投资收益的多目标输电网规划方法，综合考虑市场参与者对输电投资收益和社会总福利的要求加热管及其对输电网规划的影响。

The characterization of structure of modified MWNTs was carried out by means of fourier-transform infrared spectra,thermal gravimetric analyses and transmission electron microscopy.Photographs of dispers...

并考察了修饰前弱亲油性的纯碳纳米管、酸化后亲水性的碳纳米管和修饰后两亲性碳纳米管这3种碳纳米管在水和氯仿形成的两相体系中的分散情况，观察到所制备的两亲性碳纳米管能够均匀分散在油水两相界面上。

By a survey on the ecotourist"s attributes , motivations, environmental attitudes and behavior tendency , this chapter distinguishes two kind of different ecotourists—soft ecotourists and relatively hard ecotourists, summarizes their characteristics and obtains the enlightenment of the Nature Reserve ecotourism. The fifth chapter, according to the real investigation result, puts forward the proper management suggestions on the basis of ecotourist behavior characteristics, that is, to follow the principle of basing "the material to management and implement the classified management.

本章通过对生态旅游者的属性、生态旅游动机、生态意识及行为倾向的调查，得出存在两种不同类型生态旅游者——一般的和比较严格的生态旅游者，总结其特征并得出对保护区生态旅游的启示；最后第五章根据调查结论，给出基于生态旅游者行为特征的管理建议，提出遵循因&材&施管的原则，应对生态旅游者实行分类管理。

It's dolled up with a snorkel, a constellation of ancillary lights, and huge, 35-inch mudders at each corner, as well as a rigid painted roof and an all-new ARB two-person Simpson II rooftop-mounted tent and touring awning mounted to the cargo rack.

这是dolled了一个管，一个星座的辅助灯光，和巨大的， 35英寸mudders在每个角落，以及严格的画屋顶和一个全新的ARB的两个人的辛普森第二屋顶安装帐篷和旅游雨篷装的货物架。

The flow and heat transfer of HDPE thick wall pipe at die parallel lend and calibration sleeve were analyzed in this paper, also a new method for calculating specific heats from DSC diagrams was put forward at melt-solid two phases model.

本文对HDPE厚壁管的口模定型部分以及后面的冷却定径部分的流动和传热问题进行了分析，建立了数学物理模型。在凝固区两相模型中，提出了求解比热的新的处理方法。

The temperature of flue gas out of air preheater in boiler is normally about 120～180℃, the flue gas enter the absorb tower from the bottom via pre-deduster and is accelerated by venturi tube at the bottom of absorb tower, then is taken to circulating fluid bed. The materials are in the circulating fluid bed, due to the effect of flow, the gas-phase and solid-phase generate fierce turbulence and combination and are fully contacted, then form polymers constantly during the ascending and return downward, while the polymers are constantly disassembled during fierce turbulence and elevated by airflow, which makes the slip velocity between gas and solid reach the tenfold times of single slip velocity.

首先从锅炉的空气预热器出来的烟气温度一般为120～180℃左右，通过预除尘器后从底部进入吸收塔，然后烟气通过吸收塔底部的文丘里管的加速，进入循环流化床，物料在循环流化床里，气固两相由于气流的作用，产生激烈的湍动与混合，充分接触，在上升的过程中，不断形成聚团物向下返回，而聚团物在激烈湍动中又不断解体重新被气流提升，使得气固间的滑移速度高达单颗粒滑移速度的数十倍。

Methods firstly, twenty female wistar rats were divided into 2 groups at random. each rat in des group (a0) was subcutaneously implanted with des encapsulated in silastic tube. each rat in control group (b0) was implanted with blank silastic tube. after 8 weeks, all the animals were sacrificed for weight of the pituitary gland, serum prolactin level, prl-immunoreactive cell count and cyclin d1 expression in prolactinoma.

首先将20只雌性wistar大鼠分为皮下植入含des硅胶管的des组（a0组）及皮下植入空白硅胶管的空白对照组（b0组）。8周后处死所有大鼠，观察并比较两组大鼠的血清prl水平、垂体质量、垂体中prl蛋白分布及细胞周期素d1 （cyclin d1）的表达。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。