维数
- 与 维数 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Then, a series of successful numerical simulations on the finite length inclined positively buoyant jets in uniform cross flows environment are developed. Based on the results from numerical simulations, some qualitative pictures of the complex three -dimensional mean flows are given. In terms of these pictures, the flowing behavior of the buoyant jets and the mechanism of end-vortexes generation are made a study. The change rules of end-vortexes and temperature and dilution on trajectory of jets, horse-hoof shape of buoyant jets on horizontal, the phenomenon of the jets touch wall, and the effects of diffuser length^ densimetric Foroude number % velocity ratio on buoyant jets are also given.
之后对均匀横流环境中的有限长线源型倾斜浮力射流进行了大量的数值计算,根据数值模拟的结果,绘出了一些复杂的三维图,据此探讨了其流动特性及端涡的产生机理,成功模拟了端涡现象及其发展过程,对轨迹线上沿程温度及稀释度的变化规律,倾斜浮力射流的马蹄形结构,浮力射流的贴壁现象,扩散器长度、喷口弗汝德数、流速比等对浮力射流的影响等问题均给出了有价值的结论。
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Inspired by sand roses, the tiny formations that crystallize just below the desert's surface, the building's dozens of disclike forms, intersecting at odd angles and piling up unevenly atop one another, celebrate a delicate beauty in the desert landscape that is invisible to those who have not spent time there.
沙漠玫瑰石是浅埋在沙漠表层下的小结晶体,也是努维尔设计卡达国家博物馆的灵感来源。整个建筑的数怑蚑L状形式以奇特的角度交叉,并以不规则的方式相互堆叠,彷佛在赞叹沙漠景致的精致之美。这也是未在沙漠待过者无缘得见的美。
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Elmy . In addition to the arranged march some of the group converged on an A14 flyover on the outskirts of Ipswich, planting more seeds in the minds of hundreds of unsuspecting motorists.
除了安排一些游行的团体聚集在一个解答14天桥郊外的伊普斯维奇,种植更多的种子的头脑中毫无防备的数百名人士。
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It is shown that such a model can be used to design a nonlinear controller by techniques of norm H(subscript ∞) with the goal of maintaining relative equibalance water level along the open-channel reach.
以节制闸紧急启闭造成的水位波动和渠道物理建模的不确定性为抑制目标,采用泰勒级数和基于泛函估计有限差分法对Saint-Venant方程进行逼近形成了有限维状态方程,在H范数意义下对模型进行求解。
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Some methods aiming at the two problems have been researched. First, the optimal number of ATE site can be calculated based on a cost model of DAT-ATE. Second, the problem of test schedule which is equitant with two-dimensional Bin-Packing problem is presented. Then a TCG denotation satisfied with T-admissible rule is more convenient for combinational optimization. With Simulated annealing algorithm, better test scheduling results can be achieved; but there is no great optimization space because the efficiency of scheduling is greater than 90%. Third, A novel test compression method——Multi-capture testing is proposed to compress the stimuli. And the ATPG results show that MC achieves high compression ratio which is greater than 90% in some large-scale circuits. MISR, widely used in LBIST, is employed to compress the responses. The aliasing analysis demonstrates that the fault coverage reduction is little due to the existence of aliasing. Fourth, an improved TIC (called S-TIC) aiming at structured test is proposed based on ARM's TIC. A MC scheduling algorithm is proposed to compute the SoC test time and combine MC vectors to SoC test vectors. The scheduling results shows that test time is greatly reduced when using the proper scheduling priority.
首先,给出了低成本ATE的成本模型,根据此模型得到最低测试成本时系统级测试调度的基本参数——测试Site数;其次,本文将DAT-Scan方式的SoC测试调度等价为两维BP问题,为有效地求解该问题,将该BP问题表示为TCG图并通过模拟退火算法解决其求解过于复杂的问题,调度的结果表明该方法在测试时间上有一定改善,并指出DAT-Scan测试调度效率已经大于90%,进一步优化的空间较小;第三,本文尝试通过测试压缩来解决激励所需的测试带宽,提出了Multi-capture结构并解决了MC测试过程中的&矢量&退化问题,MC测试的ATPG结果表明其测试压缩率很高(大电路接近90%);第四,在激励获得很高压缩比的情况下,测试响应也需压缩,本文采用LBIST中常用的MISR作为MC测试的响应压缩电路,理论分析和实验结果都证明了MC测试的别名对故障覆盖率影响较小(小于2%),并对两类别名的成因做了具体分析;第五,在MC测试及其响应压缩的基础上,本文改进了ARM公司的测试控制器TIC使之适合于MC测试,为了解决MC测试矢量合成问题,本文抽取了MC测试模型,通过固定优先级的MC测试调度模拟将MC矢量合成为ATE矢量,并模拟出了总的MC测试时间。
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The algorithm uses the six-dimensional Legendre orthogonal coefficients to form a vector for describing the shape of glottal flow derivative.
该方法将声门波导数波形在6维正交勒让德坐标系中的投影构成了描述其形状的特征矢量,并采用基于GMM的概率分类加权转换算法,使每个特征矢量的转换规则可由多个类所对应的规则的线性加权组合得到,可以使转换性能得到较大的提高。
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Since hundreds of years, the French intellectual has been following the Italian formula in regard of the cultural dialectic to write the myth of nation.With the wide-spread patriotism to defend French against English, the theory of gravitational model (「le modèle gravitationnel」)Calvet derives from scientific observations seems exceptionally impassionate.
数百年来,法国知识份子依循义大利模式,在文化的领域书写国家/国族神话;而在一片保卫法语的爱国心声当中,卡维基於客观学理所得到「万有引力模式」(「le modèle gravitationnel」)的看法,显得冷静许多。
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With the guide of non-linear program theory, by using interpolative steps and inexact line search, an improved conjugate gradient method was found, by which the training rate of BP networks increases by tens or hundreds of times. Moreover, the improved method is effective to solve non-linear equations for which Newton's method does not converge owing to the problems of the quadratic derivative and inverse matrix.
通过大量的数值模拟试验发现,在非线性规划理论的指导下采用间插步骤和不精确的一维搜索技术改进的共轭梯度法,是基于梯度和共轭方向的连续搜索算法中最有效的算法,这种算法使BP网络的训练速度提高几十到几百倍,使BP网络的实际应用效果大为改善;而且这种算法对于用牛顿法由于求二阶导数和求逆矩阵等问题难于收敛的非线性方程组的求解也是很有效的。
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And the parameters inversed by using the GA are in agreement with those of real media.
此外,本文最后为了与频率波数分析的结果进行对比,研究了时频分析方法-魏格纳维尔分布,用数值模拟和实验结果分析了层状介质中瑞利波的频散曲线。
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A simple,concise,and rigid method based on the isentropic and adiabatic energy equations to prove the condition of critical flowrate for one dimensional isentropic flow is given in the paper.
给出定常一维等熵流的临界流量发生在喉部马赫数为1时的一种新的证明。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力