内轴

The above problems are studied in this thesis. First, the implicit NND scheme with mix flux splitting method proposed by Zhang Hanxin that is first order accurate in time and second order in space is modified. The modified scheme keeps the characteristics of fast convergence and is second order accurate both in time and space. It can be capable of simulating the unsteacly flow. Second, the topological method founded by Zhang Hanxin is improved to study the characteristics of vortex near the singular point on its axis and the cross streamlines on the longitudinal section passing the vortex axis. On the basis of topological results, a program which visualises numerical results is made out. It can help us analyse the characteristics of vortex motion.

本文对上述问题做了研究：第一，在数值模拟方面，借助于张涵信提出的NND算法和混合通量法，我们将他建立的时间为一阶、空间为二阶精度的快速隐式算法推广为时间和空间均为二阶精度的算法，这样做保留了原格式收敛快的特点，而且能适用于真实的非定常流态的计算；第二，将张涵信的拓扑分析方法加以推广，研究了涡轴附近及破裂点邻域内流场的空间特征，并以这些拓扑分析结果为指导，研制了一套显示计算结果的软件，这一软件能很好地帮助我们分析流场的计算结果和旋涡演变的特征。

In operation, a annular cutting knife moves forward to cut off the knife anvil (4),and when the annular cutting knife moves backward, it carries off the inner ring of the knife anvil (4), the elastic locking piece (5) is springed back and replaced.

手术时，环形切刀向前运动切断刀砧、后退时把刀砧内圈带走，弹性锁片发生回弹复位，在各种辅助机构的配合下，钉砧环便可以绕着钉砧轴发生翻转。

Each rear car wheel has a separate axle , and there are two side gears splined to the inner ends of the two wheel axle s.

每个后车轮都有一个独立的车桥，两个半轴齿轮用花键与两个车轴的内端相连。

The flowfield numerical simulation of the axisymmetric jet emanating fromthe organ-pipe nozzle is made with the turbulence κ—ε two equations model, providing the basis for improving its cleaning ability.

采用湍流κ-ε二方程模型对风琴管式喷嘴内外流场进行数值模拟，弄清其流场的流动特性（轴向速度、径向速度的分布规律和衰减规律），为提高清除岩屑效率提供依据。

No labeled motoneurons were found in the facial nucleus. Labled motoneurons were ipslaterally abolished after the cranial rootlets of accessory...

悬雍垂肌是疑核内运动神经元的轴突，经副神经延脑根出颅，再经由迷走神经咽支进行支配。

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

Piston-type check valve: valve within the valve seat around the valve pin rotation.

活塞式止回阀：阀瓣围绕阀座内的销轴旋转的止回阀。

Prophylls absent. Leaves alternate, opposite, or whorled, main lateral veins all basal; reticulate veins inconspicuous. Flowers bisexual, very small, often within depressions in rachis, sessile.

先出叶无。叶互生，对生，或轮生，主要侧脉全部基部；网脉不明显花两性，很小，在在轴，无梗里的沮丧内的通常。

In the late globular proembryos, three regions could be identified, i.

在晚球形原胚内可划分出子叶形成区、胚芽原区和下胚轴—胚根原区。

Based on the model calculation,an FAPP ventilation system was madein Beijing Poultry Breeding Company.Through running test and a series ofphysical and chemical characteristic measurement,the distribution of flowspeed in length,and breadth was given.The average temperatureand rel-ative humidity,the amplitude of T and RH per day of 30 days in winter,and instantaneous T and RH in 24 hours wre measured in FAPP house,com-paring house and outside,the result shew that FAPP ventilation system wassuperior to comparing house.The dust concentration and microrganism con-tent were also measured in the rearing piriod of poultry,the value in FAPPhouse was junior to comparing house.

在模拟结果的基础上，设计了一套FAPP通风系统并在北京市种禽公司原种后备场种雏舍进行了实际运行试验和一系列的理化特性参数的测试，试验给出的正压管道式送风舍纵轴方向及横截面上气流速度的分布规律与模拟结果相吻合；通过对FAPP舍、对照舍及舍外冬季30天的逐日平均温湿度、温湿度振幅以及24小时瞬时温湿度的测试分析，显示了FAPP通风系统在冬季通风中明显优于负压通风系统；在雏鸡全周期的饲养过程中还对舍内粉尘与微生物的含量进行了测试，FAPP舍的值明显低于对照舍，这一结果为FAPP通风系统的推广应用提供了实验依据。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。