向极的

Li and one of his lemmas toabbreviate the nonnormal Cayley digraph 〓 into the case when 〓 is a dicycle.When 〓 is a dicycle,we give the sufficient and necessary conditions for 〓 to benonnormal and the structure of the corresponding automorphism group Aut.

Li定义的一个图〓，其中N是Aut的一个非平凡极小正规子群，和他的一个引理，把对非正规Cayley有向图Γ的讨论简化到〓是一个有向圈的情况，进而决定了当〓为有向圈时，Γ非正规的充要条件和Aut的结构。

In an LS3PR net, it is verified that there exists a bijective mapping froma strongly connected block of its resource digraph into a strict minimal siphon. In anS3PR net, it is verified that there exists a bijective mapping from a strongly connectedcontributing subdigraph of its contributing resource digraph into a strict minimal siphonin it.

结合Petri网理论和图论，分别给出了LS3PR和S3PR网的资源有向图的概念，分别证明了在资源有向图和有效资源有向图中的强连通块对应LS3PR和S3PR网中的一个严格极小信标的结论。

Because of the particularity of claw pole structure, the axial magnetic field produced by the stator winding is transformed into the diametric one along the circle of air gap.

当定子绕组通电时，电机中产生轴向磁通，爪极的作用就是将定子绕组产生的轴向磁场转化为沿气隙圆周径向排列的磁场，同时将 1对极转化为 P对极[1] 。

The concept of zero-path tracking in homotopy is generalized into minimum-path tracking and a new method for the training of multi-layer perceptron is thus put forward──the homotopic BP algorithm. An analysis is made on the convergence property of the proposed method.

采用同伦BP算法进行多层前向网络的训练高小榕，杨福生（清华大学电机及应用电子工程系北京100084）摘要本文把同伦论中零点路径跟踪的概念推广到多层前向网络能量函数极小点路径的跟踪，从而提出多层前向网络一种新的训练方法──同伦BP算法（包括教师同伦和输入同伦），并且分析了其收敛性质。

Two polar nuclei move to the micropylar end before sperm is released in a gap between the egg cell and central cell and subsequently taking off cytoplasm one after another. The sperm nucleus moving to the egg nucleus runs faster than the one to the polar nuclei. It fuses with the polar nuclei that are moving towards the antipodal cells at the chalazal end.

精子释放前，两极核移向卵细胞的合点端；两精子释放于卵细胞与中央细胞的间隙后，先后脱去细胞质，然后分别移向卵核和极核，移向卵核的精核快于移向极核的精核；精核与两极核在向反足细胞团方向移动的过程中完成雌雄核融合。

Two polar nuclei move to the micropylar end before sperm is released in a gap between the egg cell and central cell and subsequently taking off cytoplasm one after another. The sperm nucleus moving to the egg nucleus runs faster than the one to the polar nuclei. It fuses with the polar nuclei that are moving towards the antipodal cells at the chalazal end, Images showed the fusion process of male and female nuclei and polyspermous fertilization.

精子释放前，两极核移向卵细胞的合点端；两精子释放于卵细胞与中央细胞的间隙后，先后脱去细胞质，然后分别移向卵核和极核，移向卵核的精核快于移向极核的精核；精核与两极核在向反足细胞团方向移动的过程中完成雌雄核融合。

The former shifts equatorward when AE increases, just as the auroral oval does; the latter is divided into two sections: the midnight section shifts poleward when AE increases, while the morning section shifts equatorward.

在亚暴膨胀相，随着AE指数增大，整个极光卵向赤道扩展，而极光电集流带却表现出分段差异的特点：下午—黄昏东向电集流带向低纬移动，晨侧西向电集流带也向赤道移动，而子夜—凌晨西向电集流带则向极移动。

This chapter chooses gradable antonyms as the target and discusses the mark phenomenon of measurement antonyms, evaluable gradable adjectives and unevaluable gradable adjectives.

本章以极性反义词为研究对象，分别探讨了计量反义词、具有评价极向性的形容词和不具评价极向性的形容词中的标记现象。

S Broad asphalt along the main road, followed by the array of more than 30 of its significant interest in large, medium and small Recreation: If the crazy "roller coaster" in the air on the track and came to a series of somersaults, and let you experience a soul-stirring centrifugal, rapid rotation of panic, can be done to stimulate;"fast scooters" in the track km On the fast, as Shirupozhu dive 30 meters high slope, Huer mad to Jixuan, feelings like Cloud Nine fall, as if riding a bull at running back; in particular, the addition of new large-scale projects,"Challenger Tour" Mars will give you the speed of excitement around the world,"wind speed," you over 10 meters in height, during which around and up and down several times before and after the turnover, there is a non-feet under the ultimate experience weightlessness; and the "monster House "is another boost fan, pitch dark, cold wind gusts, desperate calls and setting of zombie ghosts and volatile side of the creeps you scared, scared; 50 meters out to the" Ferris wheel "to let you enjoy the" List Small hills,"the sense of endless;" Liu Yong Jin,"When you enjoy the" drift "Huiguoshenlai no sense, as water spilled from the mountain 10 meters high fly drift down the moment, the heart Has been hanging in the air to the; also hit eyeful of Venus "bumper car"; as the mischievous people Shuaixiang half-empty,"Spider-Star,""rotating aircraft" and "forest mouse car," and so on, you will be able to bring a Although the stimulus was accompanied by tears, but more interest is the doubling of the situation, a test of your willpower.

沿着宽阔的柏油大马路，依次排列着三十多个各显其趣的大、中、小型游乐项目：如疯狂&过山车&在凌空的轨道上急转直下而又接连翻腾，让你经历一场惊心动魄的离心、快速旋转的恐慌，可谓极尽刺激；&快速滑行车&在千米的轨道上风驰电掣，势如破竹般俯冲三十米高坡，忽儿狂转急旋，那感觉仿如九霄云外下坠，又好象骑在蛮牛背上狂奔；特别是新增设的大型项目&挑战者之旅&将带给您火星绕地球的速度快感，&极速风车&，你凌驾十米高空中，其间几度上下左右和前后翻转，真有一种双脚无着下的终极失重体验；而&妖怪屋&又是另番刺激，伸手不见五指，寒风阵阵，绝望的叫声和出没无常的僵尸鬼面，吓得你毛骨悚然，胆战心惊；拔地五十米的&摩天轮&让你享受&一览众山小&的无垠感觉；&激流勇进&，当你优悠的&漂&感还没回过神来的时候，高山泻流水般从十米高处向下飞漂的那一刻，心已悬到半空中了；还有撞到满眼金星的&碰碰车&；恶作剧般把人甩向半空的&星际蜘蛛&、&旋转飞机&和&森林老鼠车&等，都能将你带到一个虽然伴有被刺激后的泪花，但更多的是兴致倍增的境地，考验了你的意志力。

Because of the unique fitting mode of hydraulic drawing, early wrinkles of conical parts (very likely to wrinkle in ordinary deep drawing) fit orderly to punch under the action of counter pressure as the punch moves down ward, thus wrinkle-free parts can be obtained.

由于充液拉深方法独特的贴模方式，使普通拉深方法极易起皱的锥形件成形初期产生的皱随着凸模向下运动在对向液压的作用下顺次贴向凸模，从而可以得到无皱的零件。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。