查询词典 vortex ring

In some species, the leading edge vortex spirals out towards the tip of the wing, while in others there appears to be no spanwise movement of the vortex.

在一些物种，前缘涡的螺旋出对小机翼，而在其他国家似乎没有展运动的旋涡。

This source term model helps to predict the velocity and vortex fields in consistent with a full gridded vane vortex, hut the grid number reduces by 65%.

源项模型可以得到与全网格数值模拟基本一致的诱导速度场和涡量场，而网格量减少了65%。

WIG craft ; wingtip vortex ; downwash angle ; induced drag ; numerical simulation ; ideal vortex model

地效飞行器；翼尖涡；下洗角；诱导阻力；数值模拟；理想涡模型

The semi-simple ring and semi-prime ring. Using properties of zero-divisors, regular elements and diaphysis elements , we obtain some results on the commutativity of Kthe semi-simple ring and semi-prime ring as follows:Let R be aKO|..

the半单纯环、半质环以及任意环的研究，利用零因子、正则元及骨干元的性质以及稠密性定理等相关知识，得到了关于Ko|。。

Soc _RR is a injective left R-module.(4) Soc _RR is a left self-injective ring.|Theorem 4.2.9 Let R be a commutative notherian ring, then the following are equivalent:(1) R is a FS-ring.(2) R is a PS-ring.(3) Every minimal ideal of R is injective.(4) Every minimal ideal of R is p-injective.

定理4.2.9若R是交换的Noethe(来源：Aae0eBe0C论文网www.abclunwen.com)r环，则以下条件等价：R是FS-环；R是PS-环；R的每个极小理想都是内射的；R的每个极小理想都是p-内射的；R是IS-环；R的每个极小理想都是投射的；R的每个极小理想都是平坦的。

Using properties of zero-divisors, regular elements and subdirectly irreducible ring , we obtain some results on the commutativity of semi-prime ring and Jacobson semi-simple ring as follows 1 Let R be a semi-prime ring ,a∈R and 2a is not zero-divisor,If R satisfies one of the conditions in this paper , then R is commutative.

在某些特殊环的交换性方面取得了进一步的结果，并得到了一些新的结论，主要有一设R 为半质环，a∈R ，且2a 为非零因子，如果R 满足论文中八个条件之一，则可以证明环R 为交换环。

As one of the first manufacturers of bearing steel ring in China, the company is mainly engaged in such products as bearing steel ring for cotton spinning, nut, retaining ring, cotter pin, closing ring and flat pad etc.

经试验证明，"衰退钢领"内跑道的几何形态无显著变化，表面具备足够硬度，精抛光后（钢领可达到▽10-▽11级），上车使用效果非常好，可连续抛光使用能达到钢领使用寿命3-5年以上。

The pigment in colored cotton fibers was extracted by methanol at room temperature. The results of color reactions HCl-Mg reaction, NaBH4 reaction, NaOH reaction, FeCl3 reaction and Pb(Ac2 reaction of the pigment extractive showed that the pigment extracted by methanol was flavone or flavonol with two adjacent hydroxide groups (Table 2, Fig. 1). The results of UV spectral analysis further proved that the pigment extracted by methanol from brown fiber belonged to flavone with two adjacent hydroxide groups in B ring, and that from the green fiber contained not only flavone but also flavonols with two adjacent hydroxide groups both in A ring and B ring and indican replaced a hydroxide group at 3-site of A ring Fig.

通过盐酸－镁粉反应、四氢硼钠还原反应、碱反应、醋酸铅反应、氯化铁反应和紫外光谱吸收的分析表明，甲醇室温提取的棕色棉纤维色素可能是黄酮类化合物，B环上带有邻二酚羟基；甲醇室温提取的绿色棉纤维色素除黄酮类化合物外，还含有3-位羟基被糖甙化的黄酮醇类化合物，A、B环上都带有邻二酚羟基。

Type PG-NC NON-Crystallized ring is a new product developed by our corporation Adopting a mordent advanced technology melting the race surface of the ring and then cooling rapidly, makes the race surface of the ring into non-rcystallized metal structure, The property of PG-NC-NON-Crystallized ring is better than that of the ordinary rings.

PC-NC型非晶态钢领是我们公司研制的新一代产品。钢领采用高新技术，用激光融熔急冷改性处理工艺，使钢领工作表面具有非晶态金属结构。

Through comparing the ring and polynomial ring to power series, the defition and theorem of the ring and polynomial ring can be extended into power series.

通过对比环、多项式环与幂级数环，将环、多项式环中的性质推广到幂级数环中。

World War II: Battle of Saipan - Americans take Saipan.

1944年的今天，美国在塞班战役中拿下塞班岛。

When the scorner, the rejecter of truth, has become presumptuous; when the routine of work in the various money-making lines is carried on without regard to principle; when the student is eagerly seeking knowledge of everything but his Bible, Christ comes as a thief.{DA 635.3

当讥诮和拒绝真理的人，到了任意妄为时，当追求财利者罔顾按道义经营谋利时，当学人正在兢兢业业地研究各种知识，而单把圣经丢在一边时，基督要像贼一样来临。