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In this paper,we discuss the extension of the Dω-order and D*ω-order in partiany or-dered group,obtain the necessary and sufficient condition for an extension of the partial-or-der in partially ordered group to Dω-order and D*ω-order, and the condition for the exten-sion of every partial order in a group to Dω-order.

讨论了偏序群的Dω-序扩展,得到了偏序群的偏序可扩展成为Dω-序的充要条件,以及每一偏序均可扩展成为Dω-序的条件,同时刻划了Dω-序群。

The detailed algorithm on analyzing cracks exploration inside blocks is: enriched approximations which describe singular crack tips fields and discontinuous crack faces are employed under the Partition of Unity theory; the enriched nodes surrounding crack tips or faces are respectively mapped with corresponding enriched degrees of freedom, and the solution of all these degrees of freedom is uniformly proceeded by the implicit iteration algorithm of DDA, then fracture and breakage of DDA blocks can be analyzed. The numeric examples show this algorithm is rational and efficient.

为此建立的无网格法裂纹扩展分析算法,采用满足单位分解条件的特殊增强型函数表达裂纹周围应力场的非连续、奇异特性,将对应的扩展自由度动态映射到裂纹周围的节点上,统一按DDA法隐式迭代方式求解,实现块体裂纹扩展和强度分析,相关算例结果显示该算法是合理有效的。

The direction of crack propagation is victual to the direction of maximum stress if the anisotropy of material is sufficiently weak. Universality of fractal dimension of fractured surface would be easy to appear in this case. On the contrary, the crack propagates along the plane with the lowest surface energy.

当材料结构的各向异性特别显著时,裂纹的扩展沿着比表面能最小的方向扩展,这时,断口分维与材料本身的结构有关,表现为断口分维的特殊性;反之,当材料结构的各向异性特别微弱时,裂纹的扩展垂直于最大应力方向,在这种情况下,材料的断口分维与普适性有关。

It expanded to 106119ha in 1973, descented to 99167ha in 1987, backed up to 112440ha, and attained the max value in history—123170ha in 1998 and descent to 109934ha again in 2001. GIS overlaying analysis shows that, the spatial change of Minqin Oasis had the different characteristics in different stage in the last 50 years: at the end of 50's to the beginning of 70%, oasis expandation Was performed by extension of origin oasis; the atrophia of oasis from the beginning from 70's to the 80's was performed by increasing of non-oasis spot pieces of inner part for oasis; the main performance of keeping on expanding of oasis from late 80's to late 90's is outside extension of Baqu oasis near the upper stream, with increased oasis area in interior of hungriness and increased area of non-cultivation in Huqu oasis in the north. From 1998 to 2001, opening up wideness in interior of hungriness continued, but hnngrinessization of oasis became worse. The oases in the Minqin Basin developed from small to large and back to small in terms of area changes, and from south to north then to south in terms of spatial changes.

绿洲分布图的GIS叠加覆盖分析表明,近50年来民勤绿洲的空间变化在不同阶段有不同的特征:50年代末至70年代初,绿洲扩展主要表现为已有绿洲的外延式扩大;70年代初至80年代后期的绿洲萎缩,主要表现为绿洲内部非绿洲斑块增加;80年代后期至90年代后期的持续扩展,主要表现为靠近上游的坝区绿洲向外围扩展和荒漠腹地绿洲面积的增加,而北部湖区绿洲弃耕面积不断扩大;98年至2001年,绿洲荒漠腹地的开荒还在继续,但湖区的绿洲荒漠化还在进一步加剧。50年来民勤绿洲的发展总体上经历了一个面积由小到大再到小,空间位置上从南而北再向南的迁移过程。

Based on observation data, the development process of the breach of landslide dams due to over topping may divided into 3 modes: vertical erosion, breadthwise extension and regression erosion of dam slope. A mathematical model describing the gradual failure process of the landslide dams is established based on the formula expressing the high intensity erosion obtained from experimental data, which can integrate the 3 modes of breach development process together. The validity of the model is verified by observation data.

根据一般滑坡堰塞坝特点和实际观测到的堰塞坝溃口发展规律建立了一个溃口扩展模式,并将溃口扩展过程归纳为溃口垂直下切、横向扩展和坝坡溯源冲刷3种主要表现形式,采用通过试验资料建立的高强度泥沙冲刷计算公式将这3种表现方式联系在一起,建立了堰塞坝逐渐溃决数学模型,并利用实测溃坝资料验证了模型的可靠性。

Secondly, the paper carries on the destruction processes and the stress distribution situation numerical simulation of the concrete three point bending specimen with bias crack under static load function,, and analyze specimen crack expansion and the destruction mechanism, obtain the reason that the crack expanding flectional way is because the material nonuniformity, in the same time, from the specimen destruction process chart we can see that the crack bias degree has some influence on the crack expansion way.

其次论文对含偏置裂纹的混凝土三点弯曲试件在静态载荷作用下的破坏过程和应力分布情况进行了数值模拟,并对试件的裂纹扩展和破坏机理进行了分析,得出裂纹扩展的曲折性是由于材料不均匀性所引起的,同时从试件的破坏过程图中可以看出,裂纹的偏置程度对裂纹的扩展路径有一定的影响。

On the foundation of successful 16×16 photonic switch module, the architecture of large capacity photonic ATM switch is studied in chapter 4. A new method is proposed, which can reduce hardware cost of the growable ATM switch by introducing pair-input share fanout units before interconnect stage. This new architecture is called pair-inputgroup-interconnect ATM switch.

在研制成功16×16光学交换模块的基础上,第四章研究了大容量光电ATM交换系统的体系结构,提出了一种可有效减少可扩展ATM交换系统中互连机构硬件开销的方法,即在分组互连级前引入双输入共享扩展单元,从而得到了硬件开销较小的双输入分组互连可扩展ATM交换结构。

Hormone level in maturation medium affected cumulus expansion of COC, but cumulus expansion became less dependent on hormone level with time of culture. Porcine immatured oocytes, granulosa cells from small antral follicles and cumulus cells of immatured oocytes secreted cumulus-expansion enabling factors. Granulosa cells from 3-6mm follicles did not produce CEEF, but there was some CEEF in the follicular fluid of this sized follicles.

激素水平对卵丘扩展有影响,但随培养时间的延长,对激素的要求有逐步减少的趋势;猪卵丘扩展不依赖于卵母细胞,卵母细胞核成熟也与卵丘扩展无关;GV期卵母细胞、小腔卵泡内颗粒细胞和成熟卵的卵丘细胞都有较高的分泌CEEF能力;3-6mm卵泡的壁颗粒细胞不能分泌CEEF,但3—6mm卵泡的卵泡液中有CEEF。

Hormone level in maturation medium affected cumulus expansion of COC,but cumulusexpansion became less dependent on hormone level with time of culture.Porcine immaturedoocytes,granulosa cells from small antral follicles and cumulus cells of immatured oocytessecreted cumulus-expansion enabling factors.Granulosa cells from 3-6mm follicles did notproduce CEEF,but there was some CEEF in the follicular fluid of this sized follicles.Sun xingshen, Animal Histology and Embryology

激素水平对卵丘扩展有影响,但随培养时间的延长,对激素的要求有逐步减少的趋势;猪卵丘扩展不依赖于卵母细胞,卵母细胞核成熟也与卵丘扩展无关;GV期卵母细胞、小腔卵泡内颗粒细胞和成熟卵的卵丘细胞都有较高的分泌CEEF能力;3-6mm卵泡的壁颗粒细胞不能分泌CEEF,但3-6mm卵泡的卵泡液中有CEEF。

Hypercube has many advantages, such as smaller diameter, simple routing algorithm, many parallel paths between any two nodes, and fault-tolerance, on the other hand that the Hypercube nodal degree increased logarithmetically to the number of nodes has limited network population. So we propose a constant nodal degree hierarchical topology to remedy the weakness of Hypercube and take advantages of Hypercube most. Given the definition of FCCN we analyse the basic properties including nodal degree , number of links , extensibility and diameter (maximum network communication delay). Also we proposed a simple and self-routing algorithm applied in FCCN. Although the self-routing algorithm is not optimal, but at more than 82% case it can get the shortest path, and the percent is larger and larger increased with network levels. By the self-routing algorithm the internodal distance is calculated to evaluate the network communication delay more clearly. The average internal distance is in order of the cubic root of the network population that is almost same as logarithmetically relation in a few thousands. FCCN is a highly scalable network due to its recursive construction.

首先在比较了基本互连网络的基础上,看到超立体网络的杰出性能,包括网络直径小、寻路算法简单且为自寻路算法、容错能力好等等,但是由于其节点度随网络的规模的增加而按对数关系增长,使得超立体网络的应用规模受到极大限制,所以为了能最大限度利用超立体网络的优点的同时弥补其节点度方面的不足,作者提出了节点度等于常数4的FCCN网络结构,来最多地利用立方体网络的优点;然后在对FCCN网络进行严格的定义后,分析了网络的节点度、链路数、延伸特性、网络的直径(决定网络的最大通讯延迟)等,并提出了适于FCCN网络的简单的自寻路算法,计算自寻路算法可得到最短路径的比例,看到在多于82%以上的情况自寻路算法都是最优的,而且比例随网络层数的增加而增加;应用所提出的自寻路算法计算了可以更加准确反映网络通讯延迟的参数—网络平均节点距离,计算得到此参数与网络大小的立方根成正比,此比例关系在网络的规模在几千节点以内与对数关系的网络几乎一样;FCCN网络是一高度可扩展结构,这是因为FCCN的递归构成方式,使得网络在增加节点时其原有的拓扑结构可以保持不变,不需对网络进行重新设计,为网络的实用扩展提供了条件;理论分析得出FCCN网络是一种高度可扩展高性能网络的结论。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

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