使稳定

One simplified hypothesis is that, when the growth cone detected the directional signal, actin will polymerize asymmetrically in the growth cone, so that the filopodia and lamelipodia will extend preferentially to one side, microtubule will further follow and stabilize this growing direction.

一种假说认为，当轴突生长锥探测到方向性的信号时，生长锥内的 actin成分发生不对称聚合，filopodia及lamelipodia向一侧优先延伸，进而轴突内微管也朝同侧延伸，使生长方向进一步稳定下来。

The dorsal fin acts as a keel, giving the dolphin some stability as it swims.

作为龙骨的背鳍，因为它使一些稳定海豚游泳。

Joozone.com Tesla and others, and the subject of his assignment, a common commitment to the invention, thus creating the correct way to modern scientific research. 1877, invented gramophone, which makes him original. 1878, the study began incandescent lamp in the 10 months after many failures, October 21, 1879 in the successful location of incandescence light lights carbon silk, stable location between two days. 1882, in New York pearl Street Block communal fire was the world's second plant, built in New York Urban Electric lighting, a modern electricity system to take shape.

，由他出题目并分派任务，共同致力于一项发明，从而开创了现代科学研究的正确途径。1877年，发明了留声机，这使他名扬四海。1878年，开始白炽灯的研究，在十几个月中经过多次失败后，于1879年10月21日成功地点亮了白炽炭丝灯，稳定地点亮了两整天。1882年，在纽约珍珠街创办世界第二座公用火电厂，建立起纽约市区电灯照明系统，成为现代电力系统的雏形。

To the special request to polish the ashes of the circulation fluidized bed boiler in the thermal power station in Gao Keng,an automatic machine has been designed which can meet the demand of the circulation fluid bed pot fire grate dregs quantity big and continual,which can not only improve the thermal efficiency,operate safely and stably but alleviate the work strength and operating fees.

针对高坑电厂循环流化床锅炉对排渣的特殊要求，设计应用一种自动排渣器，能满足循环流化床锅炉排渣量大且连续的要求，使锅炉既提高热效率，安全稳定运行，又能减轻工人劳动强度，减少运行费用。

Based on the mass action law and basic combustion theory the authors propose the application of a relatively high pulverized coal concentration for use in a pulverized coal-fired boiler in order to enhance the ignition zone flame temperature, thus achieving a more stable combustion.

根据质量作用定律及燃烧基本理论。本文提出采用较高的煤粉锅炉入炉的煤粉浓度以便提高着火区火焰温度，从而使燃烧更加稳定。

FLOAT PNEUMATIC CLAMP: The work piece is held in place by float pneumatic clamp with large holding forcestable feeding characteristics to the X-slide. The integrated swallowtail type carriage is high in rigidity. The clamp is easy to movethe slides run on hardened precision linear guide waysare driven by AC-servo motors.

浮动式气动夹钳：强大的夹持力保证加工板材在X滑架上稳定地进给，全燕尾型滑架完善的刚性使夹钳很容易地在伺服电机的驱动下沿硬化的高精度线性导轨上平稳精确运行。

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory.

本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

In this dissertation the"Penalty"finite element method was employed to compute the velocity of the three-dimensional flow of power-law fluid in a profile die. In order to decrease the needed computer memory and raise the stability of numerical simulation, a set of decoupled methods such as PFEM, pseudo-body force method and transformation of momentum equation to the elliptic equation was developed to establish the general finite element equations to compute the distributions of velocity and viscoelastic stress of the three-dimensional viscoelastic flow of the Phan ThienTanner fluid in a profile die. During numerical simulation of the extrudate swell of the PTT fluid, the flow in the die and out of the die was analyzed separately, which demands less computer memory. The key techniques used in numerical simulation of the three-dimensional extrusion from dies such as decision of boundary conditions, creation of initial velocity field, selection of penalty factor, high Weissenberg number problem , regeneration of the free surface were studied in detail.

中文题名聚合物异型材口模挤出三维流动研究副题名外文题名 Study on three-dimensional flow of polymer melts during the process of profile extrusion from dies 论文作者涂志刚导师柳和生包忠诩教授学科专业材料加工工程研究领域\研究方向学位级别博士学位授予单位南昌大学学位授予日期2001 论文页码总数148页关键词挤出成型聚合物材料挤出口模聚合物异型材馆藏号BSLW /2003 /TQ320 /9 本文建立了求解挤出口模内幂律流体流动速度场的通用三维罚有限元模型；对于非线性粘弹性的Phan Thien-Tanner流体，为了降低模拟计算对计算机硬件的要求，并使模拟计算更加稳定，采用了一种去耦算法，包括罚有限元方法、拟体力方法和动量方程的椭圆类方程转化方法，并建立了求解速度场和粘弹性应力场的总体有限元方程；对于PTT流体的挤出胀大问题，提出了挤出胀大熔体口模内外分离模拟法，这样可以显著降低数值模拟对计算机硬件的要求。

It presents that the theory of fraus omnia corrumpit as theory basement of evasion of law has serious logical paradox and therefore it brings a series of problems in judicial practice. It is neither advantageous in protecting international civil and commercial actors' lawful benefit nor convenient in judicial operation in various countries and causes privity unstable.

指出&欺诈使一切无效&这一法律规避无效论的理论基础存在着重大的逻辑悖论，并由此带来司法实践中一系列的问题，既不利于保护国际民商事当事人的合法权益，也给各国司法带来操作上的困难，从而导致法律关系的不稳定。

Additionally, you should adjust the spacing between the "two", when the book block through fixed plate and activities-boards, rooms, with a slight resistance, milling cutter head back to work, it will not be due to the "two" spacing adjustment is too large to make the book block milling back friction cause occurs fibrillation an edge on the corresponding wear and tear of the medial two Launchpad, which is to ensure that quality milling back to prevent back milling deformation to make the package this consistent instructions.

此外，还应调整好&两板&间距，当书芯通过固定板与活动护板间时，略感有轻微阻力为度，铣背刀盘工作时，就不致于因&两板&间距调得太大，使书芯铣背发生颤动摩擦导致刀口对应的&两板&内侧磨损，这也是保证铣背质量，防止书背铣削变形，促使包本质量稳定的操作要领。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。