环状的

The CFD method was applied to calculate and simulate the form and action process of the cavitation at the representative character of the cavitation erosion on the surface of the hydraulic turbines.Some argumentation was presented that micro jet impacted the wall with a certain degree when bubble collapsed with the result that the maximal strain of the wall annularly distributed the local of the boundary touching the micro jet.Cavitation was gradual to develop regionally at the mode of chain reaction and di...

针对水轮机叶片表面气蚀的典型特征，利用CFD方法进行仿真计算，模拟气蚀形成和作用过程；根据模拟计算结果提出了新观点：空泡溃灭发生微射流以一定的倾角冲击壁面，壁面材料产生的最大应变在流束边界局部区域，呈环状分布；空泡气蚀在局部区域是渐进的，以"连锁反应"形式扩展，具有一定过流环境的分布特征；典型的冲蚀缺陷形貌是空泡气蚀在不同阶段的产物。

Effected by provenance from the depression northeast and the north, sandstones shaped as semicircle,are distributed in the depression northeast ,and then mudstone and silty argillite as its transition to the southwest. The sequence is classified into two types: alluvial fan-braided river sequence, which was formed by the strong tectonic movement in the lower Jurassic, lake-delta-meander river sequence that generated in the middle and upper Jurassic.

由于受凹陷东北部及北部双向物源的影响，砂岩呈半环状分布于凹陷的东北部，向西南部过渡为泥岩、粉砂质泥岩，研究中把层序结构分两种类型：既早侏罗世强烈构造运动形成的冲积扇-辫状河形的砂泥岩碎屑层序、中晚侏罗世形成的湖泊-三角洲-曲流河形的砂泥岩碎屑层序。

In normal use, there is no such thing as a freestanding bucket: they are contained in bucket brigades. A brigade is a container that may hold any number of buckets in a ring structure. The brigade serves to enable flexible and efficient manipulation of data, and is the unit that gets passed to and from your filter.

在正常使用中，这里没有孤立的bucket：他们被包含在brigade中。brigade是一个容器，包含许多的bucket而组成一个环状结构。brigade用来提供灵活的和有效率的数据操作，也是从你的过滤器中传进和传出的单元。

The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.

本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。

When pH is below 1 0, DNA denaturalization of pEGFPC3 was prominent and there was hardly protection by β-cyclodextrin.

结果 pH 1 0的酸液对pEGFPC3质粒DNA的变性作用最强，pH 1 5～ 2 5的酸液对其有部分变性作用，pH 1 5～ 2 。5范围内β-环状糊精对质粒DNA具有较为明显的保护作用，对于pH 1 0的情况仍不足提供相应的保护。

By means of the K-ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed.

针对杆式泵泵简内的流体流动问题，采用湍流模型的K-ε两方程模型和有限元方法，对在一个抽油循环中阀与活塞在几个特定的位置的流体流动进行了建模与计算，具体分析了处于阀道内和同心环状空间中的原油在上下冲程的运动规律。

In this paper the effects of different additives on room temperature viscosity to instant rice were investigated. The results show that room temperature viscosity reduced after being socked by Glyceryl stearate,β-Cyclodextrin and alcohol.

中文摘 要：研究了不同添加剂对方便米饭冷黏度的影响，结果表明：用乙醇溶液、β-环状糊精溶液、单甘酯溶液等浸泡过的米粒制作的方便米饭的冷黏度与未经处理过的米饭相比有明显的降低。

The TTB-USA we used in our study is the production of IBI corporation, it has two electrode at the tip of a 7F catheter, its tip and ablation temperature can be controlled.

本实验应用的是一种新型的超声球囊导管(through the balloon ultrasound ablation system，TTB-USA)，它将一个换能器安放在7F电极导管顶端，外面用一弹性良好的球囊包裹，在造影的引导下，把带有球囊的导管顶端置放于需消融处，用稀释的造影剂充盈球囊，然后发放超声波产生一个环状损伤，达到阻断电传导的目的。

The results show that the ground state structures of CB(superscript -)(n=1~6) clusters are linear as C clusters due to their isoelectrons. For CB (n=1~6) clusters, the ground state structure of C2B is asymmetric triangle and C6B is C(subscript 2v) symmetry planar monocycle, while the other clusters are linear.

结果表明CB(n=1~6)团簇的基态构型均为线形，这与等电子的C簇合物的结构是一致的；CB(n=1~6)团簇的基态构型中，除C2B为不对称的三角形，C6B为具有C(下标 2v)对称性的环状结构外，其余均为线形结构。

Members of such a Beltway family would have as good a chance as not to pass Ethel Kennedy, Bobby's widow and still the exuberant duchess of Hickory Hill, while driving to work along the Potomac River parkways. And if in the media or a lobbying business (a reasonable likelihood in that neighborhood),he or she would sooner or later sit down with Massachusetts Senator Ted Kennedy or his son, Rhode Island Congressman Patrick Kennedy, now in the House leadership, to make a little political rain.

对这些环状公路圈内家庭的成员而言，循波多马克河林园大道开车上班很有机会与埃瑟尔甘乃迪擦身而过(这位美国王朝的公爵夫人埃瑟尔仍活跃於 Hickory Hill，是罗伯特的遗孀)，他们也可能迟早会与麻州参议员泰德甘乃迪或是他目前位居罗德岛议会领导阶层的众议员儿子派崔克甘乃迪比肩而坐，共同创造一场政治的及时雨。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐