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A series of erosion-corrosion test has been done to J55 steel under the influence of current of gas-liquid phase by indoor self-made devices, and the corrosion mechanism of current of gas-liquid phase to oil pipe's inner surface has been got. The results show that oil pipe's inner surface will be corroded fleetly by liquid medium and corrosion products will form on it. But at the same time, the corrosion products or protective layer will be removed from the inner surface of steel pipes under the alternate impact of high speed gas and liquid flow, and on this bare steel surface corrosion film will form again and be removed again. Thus, by these ways the corrosion is exacerbated. Surface erosion-corrosion failure comes into being with the circulation of this process going on.

本文主要在气液两相流作用条件下，通过室内自制装置，对管材钢J55做了系列冲刷-腐蚀试验，结果表明，气液两相流对钢管内表面冲刷－腐蚀的机理是钢管内表面会受到液体介质的快速腐蚀，生成腐蚀产物，同时钢管金属表面不断被具有高流速的气液相交替地冲击，不断地从金属表面脱去保护膜或腐蚀产物，裸露的钢表面又会被介质快速腐蚀形成腐蚀膜后，再被两相流冲掉，如此反复，造成管内金属表面膜的连续破坏，使腐蚀加剧，最终导致钢铁表面的冲刷腐蚀失效。

The short-day effect is recepted by theleaves of M.charantia seedling.The first pair of shield-shaped opposite leavesof balsam pear seedling are slow to short-day effect.while the third and forthpalm-shaped alternate leaves are most sensitive to the photoperiod.

苦瓜幼苗中对短日反应的感受部位是叶片，它的第一对盾形对生真叶对短日的反应比较迟钝，而第三、四片掌状的互生真叶对短日最为敏感。

Cffcd950cBattalion|r : The Engineering Corps will be sending in men to set up a parameter defense network.

Alternate Suggestion：|cffcd950c指挥部|r ：工程部队将会被派到你们所在的区域建立网络防御系统。

It is presumed whether the electron temperature can rise up quickly in the early discharge and fall down rapidly during the discharge afterglow is the key to realize the alternate oscillation of self-terminating and recombination lasers in univalent ions of strontium in experiment.

分析了两种激光交替振荡的发射过程、脉冲宽度特性和粒子数反转机理，认为在放电早期和余辉期电子温度的急剧升高和降低是Sr离子自终止和复合激光实现交替振荡的关键所在。

Just because contemporary university students are in the improving period of the social system alternate, and are also facing the in-depth reformation of the university educational system. Especially the reformation related to university student's vital interests becomes gradually deepening, makes their environments increasingly complicated and various. Talent competition is fierce day by day, the pressures from study, economy, employment, emotion increased generally, and university students' age characteristics, cognitive level, growing environment and limitation of the growing experience exist, these factors cause them unavoidably to suffer various setback tests. University students are in front of a great deal of contradictions and conflicts such as thought and reality, independence and dependence, self-humiliation and self-respect, freedom and discipline, in this case they usually have weak psychological endurance and weak setback resistance.

正是由于当代大学生处于社会新旧体制交替的变革时期，又面临着高校教育体制改革深化，特别是涉及大学生切身利益的各项改革的逐步深入，大学生所面临的各种环境日益复杂多样，人才竞争日益激烈，来自学习、经济、就业、情感等方面的压力普遍增大，加之大学生的年龄特征，认知水平，社会生长环境以及成长经验的局限，导致他们不可避免地要遭受各种挫折的考验，他们在理想与现实、独立与依赖、自尊与自卑、自由与纪律等诸多矛盾和冲突面前，往往表现得心理承受能力弱，耐挫折能力差的弱点。

The alternate strip and equivalent width vertical cultivation of millet and mung bean could make good use of the self-advantage of millet and mung bean, significantly enhance the utilization ability of natural resource in local and improve the physiological progress of millet carried out successfully in vivo, meanwhile it also achieved the purpose of yield increasing and efficiency promoting.

谷子、绿豆分带等宽立体栽培能充分发挥谷豆的自身优势，显著提高对当地自然资源的利用能力，促进谷子体内生理过程顺利进行，从而达到增产高效的目的。

It is shown that the contact interaction enables bottom drillstring to whirl backward, and then an alternate bending stress with higher frequency is produced. So the drillstring fatigue failure could be accelerated. At the same time, a quite strong wallop force of high frequency is produced on the contacting point, and the contacting zone is next to the screw coupling of drill collars. It will easily result in the failure of screw couplings. The research results provide theoretical basis for the prevention of drillstring failure.

研究表明，下部钻柱与井壁的碰摩作用使下部钻柱反向涡动，产生高频的交变弯曲应力，会加速下部钻柱疲劳破坏；下部钻柱与井壁接触点处存在较大的高频冲击力，并且接触区域靠近钻铤螺纹联结处，更容易诱发螺纹联结处失效，该研究成果可为预防钻柱失效提供理论依据。

Finally the numerical results are presented to confirm the effectiveness of Gauss-Seidel parallelized with alternate tiling method,specifically compared with owner-computing and red-black Gauss-Seidel methods,and show that the new parallel iterative method has better parallel efficiency as well as scalability.

许多物理应用问题的求解都归结为求微分方程数值解，其核心是高效地求解线性方程组，GS(Gauss一Seidel)和SOR迭代算法以其高效性和实现简单的特性成为大型线性方程组求解的重要算法，并且常用作非定常迭代算法的高效预条件子，是许多应用软件的核心算法之一。在并行处理系统

A special alternate-art foil version of Avatar of Woe will be given out all weekend at Pro Tour San Diego.

一种特殊的新版闪灾祸化身将在周末的圣地亚哥PT赠送，同时画师rk post会在现场进行签名活动。

Stamens inserted above middle of corolla tube; filaments very short; anthers narrowly oblong or ovate, included, free from pistil head, base rounded; disc scales alternate with ovaries.

雄蕊花冠筒的着生的在中部以上；花丝非常短；花药狭长圆形或卵形，包括，离生的雌蕊头状花序，基部圆形；花盘鳞片互生的具子房。

We will see more and more activist government policies that distinguish economic activities according to the nationality of the actors.

我们将看到越来越多激进的政府政策，这些政策根据企业的国籍来区分经济活动。

If we can prove the independence of an axiomatic system, then we can guarantee the conciseness of this system, ie.

如果能够证明某个一阶谓词系统的独立性，那么就能够保证该系统的建立是精炼的，即没有任何一条公理或推理规则是多余的。