查询词典 computation time

In the computation of aerodynamic forces, the present work is based on the work of Morino et al., but the following aspects are improved:(1) In computing the steady transonic aerodynamic load, the steady transonic nonlinear integral equation is solved by relaxation-iteration method in this thesis, instead of solving the time dependent transonic nonlinear integral equation, so that the computing time is saved greatly;(2) The influence coeifficients represented by volume integral are transformed to surface integral by using the Gaussian Theorem, so the analytical form of these coeifficients can be obtained and this leads to be more convenient to analyse and compile computer program;(3) The shock capturing method is used in every time step in present work, no shock moving term is added in the integral equation, so that it is more convenient and simpler to treat.

在气动力计算方面，本文基于Morino等人的工作，作了如下几方面的改进：（1）在计算定常跨音速流场（作为非定常绕流计算的初场）时，本文采用松驰迭代法直接求解跨音速定常非线性积分方程，而不是采用时间相关法求解非定常非线性积分方程，这样大大节省了计算机时；（2）将以体积分形式出现的影响系数化为面积分，并获得解析公式，这样便于分析和编写程序；（3）对运动的激波，本文通过在每一个时间步长上采用激波捕捉法而得到，而不是在积分方程中附加激波运动项，因而处理起来简单方便得多。

By time-varying filtering, we realize the signal selectivity and interference suppression, especially for the signals with time-varying power spectrum. It is shown herein that conventional eigenstructure based methods are lower dimensional special case of the time-frequency subspace fitting method. The closed-form array response estimation algorithms for blind source separation in wireless communication is also developed in the dissertation by exploiting the data structure of second-order statistics of the array output in the presence of multipath. The proposed method achieves array response estimation with little constraint on signal property and propagation environment such as scatters or angular spread. Moreover, the array utilized here can be of arbitrary geometry and even uncalibrated. Since the closed-form solution is obtained, no misconvergency may occur and large amount of computation can be saved. The equivalent feed model and corresponding optimization designation are proposed to realize the downlink multi-user selective transmission. By coherent and non-coherent superposition of the electromagnetical field, multiple beams can be formed using a single array, so that each co-channel user signal is transmitted in each beam and will not interfered with each other. The proposed system scheme implements the digital beamforming and the channel allocation in the base band, therefore is suitable for the utilization of the radio software technology. The feasibility and effectiveness of the proposed model are proved by the RF experiment.

在窄带条件下，GSC－SSF方法还可以提高阵列的虚拟孔径，从而提高估计的性能；可以证明，Cyclic DOA 和SC-SSF方法可看作该方法的特例或近似； 3、提出了二维GSC－SSF方法和宽带谱相关DOA矩阵方法，利用信号的循环平稳特性解决了宽带条件下二维 DOA 估计问题，并具有阵元数少、计算量较小的特点； 4、提出了时频子空间拟合和宽带时频DOA估计算法，将联合时频分析的理论和方法引入到阵列信号的空间谱估计研究中，利用时变滤波实现信号选择性测向和干扰抑制，特别适合于谱时变信号；可以证明传统特征结构法可看作是时频子空间拟合方法的特例； 5、提出了多用户环境下阵列响应的估计方法——CARE方法，该方法对信号结构和传播参数（主要是散射源分布与角度散布）的约束较少，适用于各种几何结构的阵列甚至未校准的阵列，能够直接得到阵列响应的闭式解，因此计算量小、稳健性好，不存在收敛问题； 6、提出了针对多用户下行选择性发送的阵列等效激励模型、优化设计方法及其系统实现方案，通过空间场的相干叠加与非相干叠加使得单一阵列能够形成多个波束，并保证各波束内的用户信号各不相同且相互干扰最小；其系统方案具有在基带实现数字波束成形、信道分配并便于软件无线电实现的特点，其有效性已得到外场实测数据的证实。

According to by the time series estimate power spectral density\'s periodogram law principle,the research adopts five level of orbital power spectra which US Federal railway Administrative bureau FRA proposed;then,through the Fourier inverse transformation,the orbital not smooth time domain samples are obtained, which determine the track irregularity peak-to-peak value and the corresponding wave length; on the basis of the research,the influence of the wheel track dynamic contact force are considered.Based on the orbital roadbed coefficient\'s definition,computation model is established to solve the roadbed equispaced spring constant,and the roadbed uniform spring stiffness is obtained by using the numerical simulation method.Finally,based on the Matlab procedure platform,the computational procedure is established,and the load time interval caused by the moving train acts on the roadbed is obtained.

根据由时间序列估计功率谱密度的周期图法原理，采用美国联邦铁路管理局FRA提出的五级轨道功率谱，通过Fourier逆变换得到轨道不平顺的时域样本，确定了轨道不平顺的幅值及对应的波长，以此为基础考虑轮轨动态接触力的影响；基于轨道路基系数的定义建立了求解路基均布弹簧刚度的计算模型，采用数值模拟得到了路基均布弹簧刚度；最后，基于Matlab程序平台编制了计算程序，得到了运行列车作用到路基上的荷载时程。

Then, David has brought the human Moon's liberator, 5000 are made urgently and turns to a new generation, the most advanced counter-attack class person robot soldier, had this super Assassin's mace, is preparing the investment super nuclear weapon jumbling together all to relax with the entire unification, after all uses the super nuclear weapon on the Moon, although may get quick results instantaneous may solve the problem, but can bring the long-time nucleus pollution to the Moon, because this time cannot be suitable completely on Earth's nucleus pollution government measure on the Moon, eliminates this is the intense detonation, once the computation fault, extremely has the possibility to explode the Moon to surrounds Earth's track, thusCreates the disastrous consequence, these reasons, all are restrict this time Earth humanity to invest the super nuclear weapon the basic reason, these use in coping with raids the planetoid fatal weapon certainly not common nuclear weapon, their detonation equivalent is extremely astonishing, to as a last resort cannot use.

就这样，大卫带来了人类月球的救星，五千名被紧急制造并升级换代，最为先进的反击类人机器人战士，有了这一超级杀手锏，正准备投入超级核武器的混为一谈与全统一全都松了一口气，毕竟在月球上使用超级核武器，虽然可以立竿见影瞬间就可以解决问题，但是会给月球带来长久的核污染，因为此时在地球上的核污染治理措施并不能在月球上完全适用，除此就是强烈的爆炸，一旦计算失误，就极有可能把月球炸离环绕地球的轨道，从而造成灾难性后果，这些原因，都是制约此时地球人类投入超级核武器的根本原因，这些用于对付来袭小行星致命武器绝非一般的核武器，它们的爆炸当量非常惊人，不到万不得已是绝不能使用的。

Sits in the seashore, looks out into the distance, the blue color sea, is tranquil from time to time affably, from time to time surging forward; The deep blue sky, is clear and bright from time to time like the mirror, from time to time the pink clouds fly the volume, the beautiful scene is it may be said that eyes cannot take it all.

坐在海边，极目远眺，蓝色的大海，时而平静舒缓，时而汹涌澎湃；蔚蓝的天空，时而清朗如镜，时而彩云飞卷，可谓美景目不暇接。

Eagles--Last Good Time In Town [00:20.02]1223_dd制作 [00:58.45]I like to go out every now and then [01:02.30]I can't wait to do it again [01:06.19]But I haven't had the time [01:10.81]Lately [01:14.27]I like to step out every once in a while [01:18.89]I kind of like to do it in style [01:22.90]I haven't had the time [01:26.96]Lately [01:31.70]Lately I've been stayin' at home [01:35.60](Stayin' at home, stayin' at home) [01:39.73]Workin' the crosswords, turn off the phone [01:43.85](Turn off the phone, turn off the phone) [01:51.71]And I dream I'm on vacation [01:55.86]'Cause I like the way that sounds [01:59.98]It's a perfect occupation [02:04.27]For me [02:08.90]I don't mind being by myself [02:12.72]If there's no one else around [02:16.69]It's the last good time in town [02:38.59]Well, I could stand up straight, get a real job [02:43.25]Stay up late with the same old mob [02:47.16]But it hasn't crossed my mind [02:51.79]Lately [02:55.97]Put on a suit, work downtown [03:00.12]Then come up when the sun goes down [03:03.88]No, I haven't had the time [03:08.50]Lately [03:12.70]Lately I've been stayin' at home [03:20.37](Stayin' at home, stayin' at home) [03:21.06]Closin' the curtains, play jazz on trombone [03:24.95](Jazz on trombone, jazz on trombone) [03:32.55]And I dream I'm on vacation [03:36.79]No, you won't see me around [03:41.00]It's a perfect situation [03:45.37]For me [03:49.77]I don't mind being by myself [03:53.68]'Cause I know you'll come on down [03:57.59]It's the last good time in town [05:12.71]Lately I've been stayin' at home [05:16.58](Stayin' at home, stayin' at home) [05:20.72]Workin' the crosswords, turn off the phone [05:24.88](Turn off the phone, turn off the phone) [05:32.65]And I dream I'm on vacation [05:36.68]'Cause I like the way that sounds [05:40.96]It's a perfect occupation [05:45.20]For me, yes it is [05:49.85]I don't mind being by myself [05:53.75]If you don't see me around [05:57.75]It's the last good time, last good time in town

钛：最后好时光在城市 [按：1223_dd] [00：00.01]鹰-最后好时光在城 [00：20.02] 1223_dd制作 [00：58.45]我想现在出去，然后每 [01：02.30]我不能等待再次做 [01：06.19]但我没有时间 [01：10.81]最近 [01：14.27]我想退了，而在每一次 [01：18.89]我有点像做有声有色 [01：22.90]我没有时间 [01：26.96]最近 [01：31.70]最近我一直留驻'在家 [01：35.60]（留驻'在家里，留驻'在家） [01：39.73] Workin'的纵横字谜，关掉手机 [01：43.85]（关闭手机关闭，关闭手机） [01：51.71]我的梦想我在我休假 [01：55.86]'原因我很喜欢的声音 [01：59.98]这是一个完美的职业 [02：04.27]对我来说 [02：08.90]我不介意由我正 [02：12.72]如果没有其他人靠近 [02：16.69]这是最后一次在城里好 [02：38.59]嗯，我可以挺直腰杆，得到一份真正的工作 [02：43.25]保持与老暴徒晚 [02：47.16]但一直没有干扰过我 [02：51.79]最近 [02：55.97]关于提起诉讼，把工作市中心 [03：00.12]然后提出时，天黑了 [03：03.88]没有，我没有时间 [03：08.50]最近 [03：12.70]最近我一直留驻'在家 [03：20.37]（留驻'在家里，留驻'在家） [03：21.06] Closin'的窗帘，玩爵士长号 [03：24.95]（爵士乐长号，爵士的长号） [03：32.55]我的梦想我在我休假 [03：36.79]不，你不会看到我周围 [03：41.00]这是一个完美的情况 [03：45.37]对我来说 [03：49.77]我不介意由我正 [03：53.68]'的原因，我知道你会来的下降 [03：57.59]这是最后一次在城里好 [05：12.71]最近我一直留驻'在家 [05：16.58]（留驻'在家里，留驻'在家） [05：20.72] Workin'的纵横字谜，关掉手机 [05：24.88]（关闭手机关闭，关闭手机） [05：32.65]我的梦想我在我休假 [05：36.68]'原因我很喜欢的声音 [05：40.96]这是一个完美的职业 [05：45.20]对我来说，是有 [05：49.85]我不介意由我正 [05：53.75]如果你看不到我周围 [05：57.75]这是最后的好时机，最后在城里的好时机

The numerical results indicated that the mixing time decreases about linearly with increasing current intensity. The mixing time decreases first then increases with increasing current frequency and comes up to its minimum value at 30Hz. Applying the traveling magnetic field to the uptake or downtake when the exciting current intensity is 200 A at 10 Hz, the mixing time can be shortened by 9%~17%. With the operating conditions kept unchanged, shorter mixing time is available if applying the traveling magnetic field to the uptake instead of downtake, and the time can be shortened by 18%~26% if applying the magnetic field to both the uptake and downtake. Moreover, the mixing time decreases with increasing argon blowing flowrate, and the time comes down to its minimum value if the argon blowing flowrate is 1 600 NL/min. After the moment, the mixing time increases with argon blowing flowrate.

计算结果表明：混匀时间随电流强度的增大而减小，并且近似成线性关系；混匀时间随电流频率的增加先减小后增大，并且在30Hz 时达到极小值；在励磁电流强度为200A ，频率为10Hz 的条件下，在上升管或下降管施加行波磁场混匀时间可缩短9%~17%；在相同操作条件下，在上升管处施加行波磁场混匀时间小于在下降管施加行波磁场的混匀时间；同时在上升管和下降管施加行波磁场，混匀时间可缩短18%~26%；混匀时间随吹氩量的增大而减小，在吹氩量为1600NL/min 时混匀时间达到极小值，吹氩量继续增大时，混匀时间反而增大。

Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上，首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选，然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选，在筛选过程中考虑到预报时限长度和轨道摄动影响，引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求，利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性，从而显著地提高了前期轨道筛选的计算效率；最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点，并根据预报计算结果，分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近，推出预计最小相对距离发生时刻相对此刻的时间长度，得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度，这是一个采用变时间步长、快速逼近最小相对距离的过程。

And indeed there will be time For the yellow smoke that slides along the street,Rubbing its back upon the window-panes;There will be time,there will be time To prepare aface to meet the faces that you meet;There will be time to murder and create,And time for all the works and days of hands That lift and drop aquestion on your plate;Time for you and time for me,And time yet for ahundred indecisions,And for ahundred visions and revisions,Before the taking of atoast and tea.

呵，确实地，总会有时间看黄色的烟沿着街滑行，在窗玻璃上擦着它的背；总会有时间，总会有时间装一副面容去会见你去见的脸；总会有时间去暗杀和创新，总会有时间让举起问题又丢进你盘里的双手完成劳作与度过时日；有的是时间。无论你。无论我，还有的是时间犹豫一百遍，或看到一百种幻景再完全改过，在吃一片烤面包和饮茶以前。

Above stage approximate timetable is (established provisionally humanity is born in 5,000,000 ago east Africa a mysterious place), moves primitively the time: In front of 5,000,000 - 2,000,000 ago, settles down primitively the time: 2,000,000 ago - 500,000 years ago, compete barbarically the time: 500,000 years - in 1500, rank smell of blood exploration time 1500 - in 1840, knowledge explosion time: 1840 - 1945, technical restriction time: 1945 - 2200, belief confused time: A.D. 2200-2400 year, human unified time: After 2400, this is human history several most important times; In this long process, has had between the innumerable inferior humanity's size conflict, until now the humanity only then used the innumerable own similar blood to find the road which the final humanity went home!

以上阶段大致时间表是（暂定人类诞生于500万年前非洲东部一个神奇的地点），原始迁徙时代：500万前－200万年前，原始定居时代：200万年前－50万年前，野蛮竞争时代：50万年－公元1500年，血腥探索时代公元1500年－公元1840年，知识爆炸时代：公元1840年－1945年，科技制约时代：1945年－2200年，信仰迷茫时代：公元2200－2400年，人类统一时代：2400年以后，这就是人类历史几个最重要的时代；在这漫长的过程中，发生过无数次人类之间的大小冲突，直到现在人类才用无数自己同类的鲜血找到了最后人类回家的路！

You can get the best service in the first-class cabin, but you pay for it.

在头等舱可以得到最好的服务，但那是你付钱买来的。

It will make the characters of ethnical and local culture eliminated. On the other hand, this tendency stimulates the arousal of the selfconsciousness of ethnical and local culture. The selfconsciousness comes from the recognition, that is the global culture be a combination of kinds of local culture, not a one kind of culture.

民族和地区&的概念从来就是与&全球的概念相伴的，人类文化的全球化趋势同时也促进了民族性和地区性文化意志的勃兴和加强，它们构成了多种文化并存的全球文化体系中的有机组成部分。