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In the Northern Hemisphere, locate Polaris in the sky and Point the Polar axis of the mount in the direction of Polaris.

在北半球,从天空中找到北极星并使赤道仪的极轴望远镜指向北极星的方向。

In order to investigate the effect of IFN-γon the expression of TNF-αin the hypothala- mus-pituitary-ovary axisof RU486-induced aborted SD rats, RU486 was used to establish the abortion model, then the aborted rats were administrated with different doses of IFN-γintraperitoneal injection, the method of immunohistochemical ultrasensitive SP was us- ed to study the variation of positive TNF-αcells in hypothalamus, pituitary, ovary and uterus in normal pregnant group A, aborted model group B and three different doses of IFN-γgroup C,D,E. The main goal of this research was to study whether the low dose of IFN-γcould have a protective function to pregnancy and the mechanism of its function so as to provide morph- ologic basis for the scientific using of IFN-γin the process of animal abortion control.

为探讨IFN-γ对流产大鼠下丘脑-垂体-卵巢轴(hypothalamus-pituitary- ovary-axis,HPOA )TNF-α表达的影响,本试验用米非司酮(RU486)建立SD大鼠流产模型,通过腹腔注射不同剂量IFN-γ,采用超敏感免疫组织化学SP法(链霉素抗生物素—过氧化物酶法),观察了孕13天(d13)SD大鼠正常妊娠A组、流产模型B组、不同剂量IFN-γC、D、E组下丘脑、垂体、卵巢、子宫TNF-α的表达变化,探讨低剂量IFN-γ对妊娠是否有保护作用及其作用机制,期望能为在妊娠过程中如何科学应用IFN-γ防止动物流产提供形态学依据。

The effect of an axial applied potential gradient on the ion distribution of sodium chlorine solution confined in cylindrical nanotubes is investigated with a molecular dynamics simulation model.

用分子动力学模拟的方法,研究了轴向外加电场强度对圆柱形纳米管道中NaCl溶液离子径向密度分布的影响。

With the deformation increasing, failure in the hollow specimen starts from the hole wall for the minor principal stress; and the bearing capacity drops off.

利用中晶和细晶两种人理岩的不同内径孔道大理岩试样,在内孔压力为0时进行常规三轴压缩试验,分析试样内非均匀应力分布对试样承载能力和变形特性的影响。

Vesic's solutions to cavity expansion that include cylindrical cavity expansion and spherical cavity expansion are introduced. Then cylindrical cavity expansion theory is applied to study compaction effect of pile driving in saturated soil. Based on the results of conventional triaxial tests, a trilinear curve model is used to simulate stress-strain curve of strain-softening materials. Meanwhile, trilinear curves are also used to simulate curves of volumetric strain, minor principal strain and major principal strain. By using elasto-plastic theory, analytical solutions to cylindrical cavity expansion in strain-softening soil are presented. According to the mechanism of statically pressed pile driving, compaction effect of pile tip can be viewed as hemispheric cavity expansion. Therefore spherical cavity expansion theory is applied to obtain the solutions to stress, strain, displacement fields and final pressure. Resistance force of pile tip is calculated to estimate static pressure.

介绍了Vesic关于圆孔扩张问题的解答,其中包括柱形孔扩张问题和球形孔扩张问题,并应用柱形孔扩张理论分析了饱和软土中的沉桩挤土效应问题;在常规三轴试验成果的基础上,采用三折线模型模拟具有应变软化性质的岩土材料的应力应变关系曲线,分析了在应变软化土体中沉桩时桩周土的位移场、应力场和应变场的变化,得到了解析解答;分析了静压桩的沉桩机理,并利用球形孔扩张理论,视桩端处的挤土为半个球形孔的扩张,分析了桩端处土的位移场、应力场和应变场的变化,并根据最终扩张压力计算出沉桩时的桩端阻力,可作为压桩力的估算。

The interference effects on wind loads of two prismatic cylinders arranged in a line were studied in this paper.

本文研究了在大气边界层气流中同轴双方柱气动力载荷的相互干扰,讨论了这种干扰与风向角和间距比之间的关系。

Four-hole plate provides the strongest torsion fixation and quincunx shaped nail provides the strongest bending fixation.

4种内固定器中四孔钢板抗轴向扭转性能最好,梅花钉的三点弯曲刚度最强,对于胫骨骨折,Ender钉和矩形钉可以提供较好的稳定作用。

Rachis of inflorescences covered with scalelike trichomes; leaf blade secondary veins 6-10 on each side of midvein

为鳞片状的毛状体所覆盖的花序轴;叶片次脉6-10在中脉两边各 86 Lithocarpus mairei 光叶柯

Owing to the poor adaptation deformation capability of unsaturated loess, it's difficult to obtain data of dynamic characteristics tests with better precision and better regularity under condition of routine dynamic triaxial tests.

由于适应变形的能力较差,非饱和黄土在常规动三轴试验中一般难于得到较为准确和具有较好规律性的试验结果。

It was in doubt for long time whether the static-excitation could be used to improve Subsynchronous Resonance condition in a certain power system with serial compensation.

汽轮发电机采用静止励磁方式使轴系缩短并减少了一个质块,是否可以去掉有危害性的扭振频率,而扩大串补系统中次同步谐振安全运行区范围的问题为工程技术人员所关心。

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They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性,但我大喊,并在他们的方向扔石头让他们过的线索,远离我,以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。

Store this product in a sealed, lightproof, dry and cool place.

密封,遮光,置阴凉干燥处。