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Which may be strange coming from a Science-Fiction writer - But right now, you and me here, put together entirely of atoms , sitting on this round rock with a core of liquid iron, held down by this force that seems to trouble you, called gravity , all the while spinning around the sun at 67,000 miles an hour and whizzing through the milkyway at 600,000 miles an hour in a universe that very well may be chasing its own tail at the speed of light; And admist all this frantic activity, fully cognisant of our own eminent demise - which is our own pretty way of saying we all know we're gonna die - We reach out to one another.

听一个科幻小说作家说这话会觉得挺奇怪的——可是就像现在,我和你,都是由原子组合起来的两个物体,坐在这个铁水核心的圆形岩石上,被这种困扰你许久的动力拉扯着,与此同时我们还在以每小时六万七千里的速度绕着太阳旋转,以每小时六十万里的速度穿梭过银河,而这个巨大的宇宙说不定不过是在用光速追逐着自己尾巴的一个循环。抛开这些疯狂的状况不说,我们还都很清楚自己迟早有一天会寿终就寝——说白了就是我们知道自己早晚会死——尽管如此我们还是张开双臂接纳彼此。

As a result, it shows thatthe static or dynamic subsystem optimum alone is not equal to the system optimum. Three initial value problems met in the optimal design of flying vehicle are studied andconclusions are derived that: orthogonal test method can be adopted to decide the initial valueof static optimization problem, some mathematical techniques can be used to deal with thecostate variables of Maximum Principle and decide the initial value of the costate variable,the indirect method can be used to get the analytical solution under ideal case to guide thechoice of the initial control curve in the direct method. With some numerical examples oftrajectory optimization, it shows that all these methods are useful not only in accelerating theconvergence but also in converging to the global optimum.

针对飞行器优化设计中的三种初始值问题进行了研究,以远程弹道导弹弹道的工程优化为例说明,对于静态优化问题,采用正交试验法选取初始值,不仅可以大大加快收敛的速度,而且更有可能收敛到全局最优解;以气动力辅助变轨问题为例说明,用共态变量的一阶泰勒级数展开可以解决极大值原理中共态变量初值难于确定的问题;以二级弹道导弹的主动段弹道优化为例说明,利用间接法在理想情况下得到的解析解来指导直接法初始控制曲线的选择,将大大有利于提高直接法的收敛速度。

The average desired velocity of the drivers has been assumed to be proportional to the instantaneous velocity by M ndez and Velasco when a alternative model was proposed. Based on this postulate, the desired velocity of a single driver delineates to be proportional to the local instantaneous velocity in this paper, which is a property of aggressive drivers who all want to drive with the maximum velocity. However, the deriver does not occupy this aggressive characteristic all the time.

基于M ndez 和Velasc关于司机平均期望速度与瞬时速度成比例的假设,认为个体司机的期望速度与其局域瞬时速度成比例,期望以更大的速度行驶,然而并非所有的司机都具有这样的进取特性,为了抑制司机这样的进取特性,引入适应性公式来近似表达单个司机期望速度随时间的变化率。

Results show that hydrates dissociation in terms of pore surface is faster than that of particle by particle.

结果表明,水合物以孔隙表面形式分解的速度要快于以粒子-粒子形式分解的速度。

Niping rushed into the operating room and bursted into tears at the same time,she said to all the nurses present there full of emotion,"actually he has stay away from home for 2 hours,he misses his family ,his mother greatly,how he embosom his little child with no more than one year,but now......"

倪萍以最快的速度冲进手术室,以最快的速度从眼中流下两行液体,对全体护士动情的说:"其实……他已经离开家在外面漂泊了2个多小时了,他是多么的想家呀,多么的想他的母亲那,多想抱抱他那未满月的孩子呀,但是现在……"倪萍擦了擦眼泪接对病人道:请您对家里的亲人说上一句话吧!

The pangola grass with different length was throwed by the free body falling method and the passing time was measured using two infrared ray sensors. The calculative terminal velocity V was calculated through the time and distance. The exeperimental terminal velocity V of grass with different length was measured by the floating method.

本研究之目的乃是以盘古拉牧草为研究对象,改变不同长度的牧草茎,首先以自由落体法,利用红外线感测器量测出时间,藉由时间与距离之关系,代入公式得到计算终端速度;其次以浮力法,量测出不同长度的牧草茎之实验终端速度。

The main characteristics include: the quiet Sun corona has a rapid response to the flare heating, within 2 second the corona temperature increases nearly one order of magnitude, but later such increase becomes very slowly; the downward velocity at early stage of impulsive phase is too small to be negnected; chromospheric evaporation made by conduction shows some intensely, the maximum evaporated velocity may be as large as 1000 km/s; the chromospheric condensation appears just when the chromospheric evaporation takes place and its place always coincide with that of transition region in the early stage; the maximum of chromospheric condensation occurs also in the early stage of impulsive phase, at which the density in condensation may be larger two order of magnitude than that of surround and the downward velocity may be as large as 100 km/s; after the maximum of chromospheric condensation, its strongth decreases gradually but its width becomes greater with time and have a tendency to transport into deep chromosphere; the front of chromospheric condensation heats atmosphere obviously and the temperature in the chromospheric condensation is higher than the original case; the downware velocity of transition region may be greater than 100 km/s at the early stage; when the evaporated material collide at the top of loop, the densityand the presure there increase rapidly, which result in the formation of a shock wave; and so on.

在改善色球辐射损失和精确分辨过渡区的基础上,通过联立求解连续性方程、动量方程和能量方程,构造了一维磁限制性耀斑环在热沉积作用下的大气动力学模型,获得了耀斑热模型下脉冲相早期较为细致的大气演化理论图象,其主要特征是:耀斑对宁静日冕的加热相当迅速,仅2秒钟日冕温度增加即达一个量级,之后日冕温度增加缓慢;脉冲相早期日冕向下速度很小,几乎可以忽略,热传导驱动色球蒸发,其过程较为激烈,蒸发极大速度可达到1000km/s;色球压缩区与色球蒸发几乎同时形成,且在早期其位置总是与过渡区位置重合;色球压缩极大发生在脉冲相早期,其时密度可高于周围约2个量级,向下速度可超过100km/s;色球压缩极大后,其强度逐渐减弱,但宽度明显增大,且渐渐脱离过渡区往色球传播;压缩区内物质温度要高于原先的大气温度;过渡区下降在脉冲相早期相当迅速,可超过100km/s;当蒸发物质在环顶高速相碰时,环顶的密度、压力迅速增大,且温度也有所增加,导致形成激波,其波面以每秒上百公里的速度自环顶向下传播;在脉冲相前期,日冕软x辐射对色球的加热作用可以忽略;等。

The results were as follows the change of vitamin C content was a "trial apex"-shape curve, higher in young fruit,incrustation and maturation stages, lower in other periods; the total acid content was the highest in young fruit, after that, it decreased rapidly, maintained lower level, and reached lowest when the fruit matured; the total content of soluble sugar inosculated with the fruit development, it was high when the fruit development was quick, and low when the fruit development was slow; before 59 d after anthesis, the reducing sugar content was high in the total content of soluble sugar and after that ,the nonreducing sugar content was high; before 45 d after anthesis, free amino acid content was obviously correlated with protein content, and they inosculated with the fruit development;4559 d after anthesis, free amino acid content increased quickly, and protein content decreased gradually, this was also the most shaping period of the embryo and endosperm.

结果表明,Vc含量呈&三峰&型曲线,幼果时、硬核后和成熟时较高,其他时期较低;有机酸含量以幼果期最高,以后迅速下降并维持较低水平,果实成熟时含量最低;可溶性总糖含量与果实发育状况基本相吻合,果实发育速度快时含量较高,慢时较低;在谢花后59 d以前,可溶性糖以还原糖为主,之后以非还原糖为主;游离氨基酸和蛋白质含量,在谢花后45 d以前两者呈高度相关,且与果实生长速度相吻合,谢花后4559 d是胚和胚乳的主要形成期,此期游离氨基酸含量迅速增加,蛋白质含量持续下降。西北林学院学报21卷第5期张传来等金光杏梅果实发育期间主要营养成分动态变化研究

That is why some hydrophobic ingredients should be added in order to made floating tablet with ideal floating duration other than decreasing the tableting pressure alone.According to the eroding kinetics, the floating tablet made of HPMC with greater viscosity as K100 MCR and K15 MCR is better than that made of HPMC E 15 LV. The erosion of the tablet made of HPMC E 15LV followed the first order kinetics. 20% of the tablet eroded with 4 hours which is 22 times that of the tablet made of HPMC K 100 MCR. The fast erosion of the tablet made of HPMC E15 LV led to quick buoyancy decrease. The quick swelling of floating tablet made of CMC-Na led to quicker water uptake.

溶蚀动力学表明,以高粘度HPMC K100MCR和K15 MCR制备的漂浮片,其漂浮性能要优于低粘度的HPMC如E15-LV,后者的溶蚀符合一级动力学规律,4小时内片面溶蚀达20%,溶蚀速度比前者大22倍,由于速度太快,漂浮制剂的漂浮力因此会迅速降低;高分子材料CMC-Na制备的漂浮片,虽然遇水后迅速膨胀使体积增大,但是,由于水渗入的速度大于体积膨胀的速度,因此不能产生足够的浮力和维持理想的持续浮力,另外,这种材料制备的漂浮片的溶蚀速度太快,4小时内片面溶蚀达30%,漂浮制剂的漂浮力也因此会迅速降低。

Based on the survey of the traffic flow in Changchun city arteries, the scatter charts of vehicle speed-low data were plotted, the linear regression equations of scatter plots and their boundaries were derived and compared with the curve of Greenshields speed-flow model and the scatter plot of the freeway data, thus the speed-low characteristics in urban arteries were established, being of help for the traffic managers to determine the traffic signal control strategy.

以长春市干线道路的交通流实测数据为依据,绘制了速度流量的散点图,建立了散点图及边界的线性回归方程,并与Greenshields速度流量理论模型曲线、高速公路的速度-流量散点图进行了对比,分析了城市道路的速度-量特性。实际应用表明,该特性分析能为交通管理者确定信号控制策略提供速度流量依据。

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He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州,并在2005年伊瓦尔街,公寓生活。

Droperidol ( potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道,可能是 QT 间期延长的机制。

The Nazi's cruel treatment of the Jews during the Second World War is beneath contempt .

二战期间纳粹对犹太人的暴行极其可鄙。