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The results are presented and compared with the available results of other authors, which shows satisfying agreement. And a submerged body beneath the free surface in accelerated motion is considered; the numerical results of instant wave resistance and free surface elevation are presented and discussed.

对非定常线性兴波问题的求解,第5章作为算法的验证,从较简单的自由面运动潜体的非定常兴波问题入手,首先对无限水深自由面潜体突然加速和渐加速的非定常兴波问题作了计算,给出了非定常兴波波形和非定常兴波阻力随时间的变化曲线,计算结果与其它文献给出的结果进行了比较,其吻合程度令人满意。

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物,其基因体资讯提供植物学研究的重要依据;在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时,阿拉伯芥缘的野生物种自然成了不可或缺的关键;跟阿拉伯芥缘的物种包括A halleri及A lyrata,其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾,与缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽,而A lyrata ssp kamchatica主要分布於东北亚及台湾,与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔,这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构,本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种,两对互为亚种的姊妹群,以阿拉伯芥为外群进行研究,在四个物种完成98个同源基因的分子序列,利用套装软体MCMCcoal来估算祖先物种的遗传变异,亦估算现生物种的核苷酸歧异度,观察到?多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度,显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式,在某些物种配对间邻域种化模式应比异域种化更为可能;在基因树与物种树的比较,98个基因片段的亲缘模式只有28个是与已知物种树一致的,有23个基因其树状图支持{ lyrata} thaliana的型式,藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率,推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有代的单方向基因交流。

In this paper, the law of large numbers of asympotic martingale difference sequence was got by researching the convergence of asymptotic martingale and the Doob s analyse of asymptotic martingale .

研究渐鞅的收敛性及渐鞅的 Doob分解,证明了渐鞅差序列服从大数定

Algorithm application of neural networks.Ⅲ Implementation of neuro-computers. The main contribution of the dissertation can be summarized as follows: 1 Hopf bifurcation of three kind of neural networks are discussed in detail, including type of discrete time delay, type of time delay with weak kernel and strong kernel as well as the proof of existence of bifurcation. Other problems such as asymptotic stability of bifurcation periodic solution, algorithm of determining the bifurcation direction, asymptotic stability and style of periodic solution are also studied. The average time delay is chosen as the bifurcation parameter, phenomena pertinent to system states of the continuous time delay network with strong kernel evolving from stable to oscillating, then back to stable again are observed.

论文的主要创新之处可以归纳如下: 1)针对目前国内外对神经网络的分岔研究较少的情况,论文中详细讨论了带离散时延神经网络、带弱核的连续时延神经网络、带连续分布时延且具有强核的神经网络的Hopf分岔现象,从理论上证明了Hopf分岔的存在性,并研究了分岔周期解的渐稳定性,得到了确定周期解的渐稳定性、分岔方向、周期解的渐形式的算法;用平均时延作为分岔参数,发现带强核的连续时延神经网络中存在着系统的状态由稳定变化到振荡现象,当继续增加平均时延参数时,又从振荡变为稳定这一特殊的动力学现象。

This note is a revision and complement to [1]. The author proved that alonglower half of the curve C_1 in Fig. 11 of [1] not only m/a→∞ but also a→-∞,and that the upper half of C_1 has its asymptotic direction the straight linem=-2a. Thus, we have revised the original estimation, which stated that theupper half of C_1 has asymptotic direction m=-a.

本文是对文[1]的修正和补充,证明了沿着文[1]图11中的分岐曲线C_1的下半支应当由α→-∞,而它的上半支以直线m=-2α为渐方向,从而修正了原来对C_1上半支以m=-α为渐方向的结论,再利用文[1]中原有的知识也就修正了分歧曲线C_2~*的渐方向。

AME (Asymptotic Multiuser Efficiency) is an important factor to evaluate multiuser detector. From this point of view, performance comparison among multistage multiuser detector, decision feedback multiuser detector and linear decorrelating multiuser detector is done here.

评价多用户检测器性能的一个重要的指标就是渐多用户效率,本文第一次从渐多用户效率的角度分析对比了多级多用户检测器、判决反馈多用户检测器和线性解相关检测器的渐多用户效率。

Based on the concepts of asymptotic center point and the asymptotic radius, this paper discusses the existence and the weak convergence of the fixed point in the multi_valued asymptotically nonexpansive mappings.

本文借助于渐中点、渐半径的概念,得到一致凸Banach空间中非空有界闭凸子集上的连续集值渐非扩张映射有不动点。

With nearly 100 various types of mechanical processing equipment Taiwan, C6136, C6140, C630, C7620, and other ordinary lathe dozens of Taiwan, nearly 10 units of CNC lathes, X62, X53, such as horizontal and vertical milling machine nearly 10, Y3150, Y3150E , Y3180 hobbing machine nearly 10, gear-shaping machine 5, M131W, M7130, and other internal and external grinder, broaching machine, planer, slotting machine, spline milling, shaving machine, Heng machine, chamfering machine, and other gear Kinds of gears and gear processing equipment, and the full gear testing, inspection equipment.

拥有各类机械加工设备百台,有C6136、C6140、C630、C7620等普通车床几十台,数控车床10台,X62、X53等卧式、立式铣床10台,有Y3150、Y3150E、Y3180滚齿机10台,刨齿机5台,有M131W、M7130等内外圆磨床,有拉床、刨床、插齿机、花键铣、剃齿机、珩齿机、齿轮倒角机等各种齿轮和齿轮加工设备,另有完整的齿轮检测、检验设备。

Guards Rifle Corps (17, 19, 91 Guards., 251 Rifle Division), 84 Rifle Corps (158, 164, 262 Rifle Division);139 Gun Artillery Brigade, 610 Antitank Artillery Regiment, 555 Mortar Regiment, 54 Guards Mortar Regiment, 621 Antiaircraft Artillery Regiment;28 Guards. Tank Brigade, 735, 957 Self-propelled Gun Regiment;32 Engineer-Sapper Brigade

第5卫步兵军(第17﹑19﹑91卫步兵师,第251步兵师),第84步兵军(第158﹑164﹑262步兵师),第139加农炮兵旅,第610反坦克炮团,第555迫击炮团,第54卫迫击炮团,第621防空炮团,第28卫坦克旅,第735﹑957自行火炮团,第32工程兵旅

Guards Rifle Corps (49, 86 и 109 Guards Rifle Division), 32 Rifle Corps (60 Guards, 295, 416 Rifle Division), 248, 266 Rifle Division 44 Guards Gun Artillery Brigade, 92 Guards Corps Artillery Regiment, 507, 521 Antitank Artillery Regiment, 489 Mortar Regiment, 1617 Antiaircraft Artillery Regiment –61 Engineer-Sapper Brigade

第10卫步兵军(第49﹑86﹑109卫步兵师),第32步兵军(第60卫步兵师,第295﹑416步兵师),第248﹑266步兵师,第44卫加农炮旅,第92卫军属炮兵团,第507﹑521反坦克炮团,第489迫击炮团,第1617防空炮团,第61工程兵旅

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推荐网络例句

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。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?