尾下的

We discuss asymptotically best linear unbiased estimators of the Logistic population based on selected order statistics and give the formula of computing the ABLUE, the variance and the covariance of the ABLUE in limit, and properties of the ABLUE, and so on. We give the optimum chosen of spacing which is the ABLUE with maximum asymptotic relative efficiency based on complete sample when selected order statistics number is less than 10, and obtain its maximum asymptotic relative efficiency.

讨论基于Logistic总体Ⅱ型截尾样本的若干个样本分位数的总体分布参数的近似最佳线性无偏估计；给出了该近似最佳线性无偏估计的计算公式，估计方差与协方差的极限表达式及估计量的大样本性质等；给出了全样本，样本分位点个数固定，但不超过10情形下，使上述近似最佳线性无偏估计有最大相对联合估计效率时，样本分位数选取法及最大相对联合估计效率；为大样本情形下，该近似最佳线性无偏估计的应用提供了理论依据。

The low-dimensional Galerkin method is generalized to solve the flow around arbi-trarily translating circular cylinder.Active control problems of wakes behind circularcylinders are numerically investigated by only small number of modes.The in-line andtransverse oscillation of a circular cylinder with proper frequency produce Karman vor-tex street successfully in some subcritical regime,vhereas the transverse oscillation of acircular cylinder with 1.8 times the natural shedding frequency can effectively suppressthe Karman vortex street at a slightly supercritical Re.

将低维Galerkin方法推广至可以求解任意平移运动圆柱的绕流问题，用较少的模数值研究了圆柱尾迹的主动控制问题，在亚临界Re数下圆柱以适当的频率沿流向和横向振动均成功地激发出Karman涡街；而在略高于临界Re数下圆柱以1.8倍自然脱涡频率沿横向振动明显地抑制了Karman涡街；再现了超临界Re数横向及流向振动圆柱绕流的频率锁定等复杂非线性现象。

For such ship form with a stern of complex geometric shape, the flow field changes rapidly.

文中利用商业软件FLUENT，在不考虑兴波影响下，对各航速下的双尾船粘性流场进行数值模拟。

While it is randomly grabbing around with rage, the dragon god flits to the proximity of its feet and inserts four inverse claws into the skin of it (there are three straight claws and one inverse claw to form a whole dragon claw).

天魔出招越来越是混乱急躁，雷鞭如雨般向龙神击去，但龙神在其中滑溜地穿梭，很快又一爪抓瞎了它好几只眼，然后一尾打在它另外几只眼上，趁它愤怒乱抓之时，飞到了它足部附近，将四支倒爪刺入天魔外皮(每只龙爪有三支正爪一支倒爪)，然后一边绕著它飞，一边往上升，於是天魔身上就被抓出四道螺旋状的深深爪痕，等飞到天魔头部，龙神放开四爪，随著一声长啸往九天之上翔去，瞬时天魔头顶就出现一个直通九天的大洞，从洞中吹下的虚空旋风将天魔皮肉从爪痕处撕裂，重归暗云，从天空落下

N this paper.a method for calculating the natural frequency and eigenmode of power turbine's tower.the wind effect and displacement response of the tower along wind direction. and the wind effect and displacement response produced by the tail vortex across wind direction is introduced. The response caused by wind turbine's rotation is discussed.

阐述了风力机塔架的固有频率和固有振型、顺风向下塔架的风效应和位移响应、横风向塔架在尾涡激励下的风效应和位移响应以及由风轮旋转而引起的位移响应。

Any of several small, short-tailed birds of the family Sittidae, having a long sharp bill and known for climbing down trees headfirst.

币鸟一种体形小而尾短的鸟，有长而尖的喙，以头朝下向下爬树而闻名

First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in UG software. The elastic contact problem is analyzed in finite element method and is used to the parameters' distribution and contact stress of the joint are obtained on the base of ANSYS code. With the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high/low cycle complex load is proposed. The proposed model and the approach were verified by experiments.

本文介绍了微动损伤的机理和微动疲劳寿命的研究方法；利用UG软件对燕尾榫联接结构创建了参数化实体模型；基于ANSYS软件平台求解弹性接触问题，获得了榫联接结构接触应力及接触状态量的分布；在已有微动疲劳寿命预测模型的基础上，引入载荷频率影响因子，对低周、高低周复合载荷作用下的燕尾榫联接结构进行了微动疲劳寿命的预测，与试验结果对比表明采用本文提出的方法预测榫联接结构的微动疲劳寿命是有效的。

Aerodynamic performance is increased through the use of body under covers, a deflector under the front bumper, front strakes, the optimum inclination of the tailgate and an effective rear spoiler.

增加了气动性能，通过使用下涵盖的身体，下，前保险杠导流板，前strakes，尾门的最佳倾角和有效的后扰流板。

In this paper, the commercial software FLUENT is used to calculate the viscous flow field around a ship with Twin-skeg, without taking into account the impact of wave-making resistance.

文中利用商业软件FLUENT，在不考虑兴波影响下，对各航速下的双尾船粘性流场进行数值模拟。

The marine stern tube bearing is a special structure andcomplicated load sliding bearing, which is always under foullubricative state in real work, and always produces bad abrasion toget premature invalidation.

船舶尾管轴承是一种受力复杂、结构特殊的滑动轴承，它在实际工作中处于极其恶劣的润滑状态下，常常产生严重的磨损而导致尾轴承的过早失效，这对船舶安全航行和营运经济效益带来很大的影响。

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。