壁内的

Although the flow in the vaneless nozzle is three-dimensionat, it is two-dimensional in viscous sub-layer.

通过对喷嘴出口湍流流场的分析，认为三维湍流边界层的粘性底层内流动仍是二维的，因此可以采用可靠的二维壁面律。

For internal high pressure forming of a hollow part with big difference on section perimeter, the problems of axial feeding and preforming are necessary to be solved to produce qualified parts with more uniform thickness distribution.

截面周长差较大的空心零件的内高压成形需要解决膨胀区的轴向补料问题和预成形问题，才能获得壁厚分布较为均匀的合格零件。

So far, most research about vectored nozzles is numerical simulations of internal flow field and manuverbility. However, research about their infrared properties, especially systematically research about spectral properties is very sparce.

目前国际上对矢量喷管内流场的数值计算，矢量喷管的机动性能的研究比较多，然而对矢量喷管红外辐射特性的研究非常少，特别是系统地研究矢量喷管壁面和出口平面的光谱辐射特性方面的工作特别少。

Regarding to model 1, firstly analyzes and studies principle as well as formation of detonation wave, the internal flow field structure of the detonation chamber. Then study the flow field structure near the outdoor of the detonation chamber, backflow process of the dilatation wave after detonation wave reach the outdoor and the change of thrust wall pressure and so on.

对于模型1，首先分析研究爆震波在爆震室内形成传播机理和爆震室的内流场结构，然后研究爆震波传出爆震管以后爆震管出口处的流场结构，膨胀波的回传过程以及推力壁压力随时间的变化等。

There are many problems in the carling forming and unloading processes such as expand and shrink of U section wall, the torsion of U section and the warp of carling head.

针对纵梁冲压成形及卸载后发生的U型截面侧壁的外扩、内缩、扭转以及纵向端头翘曲等问题，首先分析了纵梁的成形及回弹变形机理，利用仿真分析软件KMAS进行了数值模拟并采用半解析、半实验方法研究了纵梁底面翘曲，找出模具结构的最佳方案。

There are many problems in the carling forming and unloading processes such as expand and shrink of U section wall, the torsion of U section and the warp of carling head. These problems are concerned by the carling factories and do not solved for a long time. The mechanism of the carling forming and spring back is analyzed. The carling forming and spring back processes are simulated by KMAS software. The warp of carling underside is researched by half analytic and half experiment method and the best scheme is found by this method.

针对纵梁冲压成形及卸载后发生的U型截面侧壁的外扩、内缩、扭转以及纵向端头翘曲等问题，首先分析了纵梁的成形及回弹变形机理，利用仿真分析软件KMAS进行了数值模拟并采用半解析、半实验方法研究了纵梁底面翘曲，找出模具结构的最佳方案。

Methods Marrow-derived mesenchymal stem cells were isolated and purified from mouse femoral bone and shinbones using differential adherent methods. Cells at the third passage were induced by 20% FBS in conditioned medium, conditioned medium alone, 20% FBS or 10% FBS alone respectively. Mouse aortic smooth muscle cells were cultured as the positive control. Levels of mRNA and protein expression of myoeardin and several smooth muscle cells marker genes were determined by immumofluorescenee, RT-PCR and Western blot before and 3, 7, 10, 14d after the induction. The presence of smooth muscle myofilaments was detected by using transmission electron microscope.

采用伞骨髓贴壁法分离骨髓问充质干细胞，CM联合20%FBS诱导骨髓间充质干细胞，同时设立持续10%FBS、单20%FBS及单CM诱导下的骨髓间充质十细胞对照组和SMC阳性对照组，分别于诱导前及诱导3、7、10和14 d时观察细胞形态的变化，并在相应的时间点用免疫荧光法、逆转录聚合酶链反应法、Western blot半定量分析法榆测myocardin以及SMC表面各种标志基因的表达变化，用透射电镜检测诱导后细胞内肌丝存在以此来证实诱导分化成功。

The infection of rhizobia to rice was a dynamic process beginning with surface colonization of the rhizoplane (especially at lateral root emergence), followed by endophytic colonization within roots, and then ascending endophytic migration into the stem base, leaf sheath, and leaves where they developed high populations.

同时，根瘤菌还可以沿植物的表面从根到地上部分迁移。在植物的生殖生长阶段，内生根瘤菌仍然保持活动性，可以进入烟草子房的子房壁、胎座和胚珠内，暗示根瘤菌通过种子向子代垂直传播的可能性。

Based on it, the computation method of steam temperature deviation of superheaters and reheaters and the inversion method of their wall metallic temperature in furnace are deduced, and applied in several boilers.

本文通过对过热器和再热器烟气侧对流与辐射复合换热过程的分析，建立了过热器和再热器各受热管段烟气侧局部传热的物理数学模型，导出了适用于大型电站锅炉过热器和再热器的出口汽温计算及炉内管壁金属温度的反演方法。

To reveal aft end internal flow feature of a solid rocket motor with submerged nozzle, a two dimension cold flow test model with rectangular channel was designed The cold gas simulation was based on geometric similarity and aerodynamic analogy Mean and fluctuating velocity field was measured using phase doppler particle analyzer It showed that the flow separates at upstream of the submerged nozzle and reattaches on the tip of the nozzle nose A relatively steady recirculation zone formed in...

为了揭示含潜入喷管的固体火箭发动机尾部流动特征，按照几何相近和气动相似原则设计了通道为矩形的二维冷流实验模型，利用相位多普勒粒子分析仪对燃烧室尾部气流的时均速度和湍流脉动速度进行了测量。实验结果表明气流在潜入喷管入口上游发生分离，再附点位于喷管前端部外侧，背壁空腔内形成一个较为稳定的回流区，流场的轴向和横向湍流强度都比较大

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％。