向

From the angle of a beam-forming, the cross- range focusing principle of the synthetic-aperture radar based on nonsinusoidal waves is studied. The expressions of antenna pattern for both rectangular signa l and Gaussian signal are presented. Compared with the conventional narrow bandw idth SAR whose cross-rang resolution is determined by the carrier frequency, th e cross-range resolution of the nonsinusoidal SAR is affected by the signal ban dwidth.

为研究非正弦波SAR的方位向分辨力，从波束形成的角度分析了非正弦波SAR的方位向聚焦原理，导出了基于矩形脉冲和高斯脉冲的合成孔径天线阵列方向图表达式，并与常规窄带SAR进行比较，指出影响非正弦波SAR方位向分辨力的主要因素为合成孔径长度和信号带宽，而与信号载频无关。

The rocks were probably situated in the followup obduction of split upper crust cover of the Yangtze Plate onto the North China Plate in or after the subduction of the Yangtze Plates continental materials towards the North China Plate,or were placed by southward thrusting when ultrahighpressure metamorphic rocks underpinned.

通过露头的构造地质分析，推断本套地层是在扬子板块陆壳物质向华北板块下深俯冲过程期间或其后扬子板块陆壳上部盖层继续向华北板块仰冲就位的，在超高压变质岩折返时经历了由北向南的逆冲。

Not only is the present Yangtze craton constrained by regional compressional stress field but also its cold and dense lithospheric root is descended into the deep mantle by negative buoyancy, Which further strengthens inward obduction of orogenic belts surrounding it. For examples, Longmen shan mountain, Huaying shan and Bamian shan mountains override onto western margin and eastern part of Sichuan basin, respectively.

现今的扬子克拉通不仅受大区域挤压应力场背景制约，同时其冷而致密的巨厚岩石圈根正在向深部地幔下拽，从而进一步加剧了四周造山带向盆地的逆冲作用，龙门山、华蓥山和八面山分别向川西盆地和川东逆冲就是例证。

In general, our primary culture performed better in myogenic differentiation, while the externally obtained cells were superior in the odontogenic/osteogenic and chondrogenic differentiation pathways.

原代培养的 hDPSCs 成肌分化能力强，而冻存的细胞牙向/骨向、软骨向分化能力强。

However, hair follicle stem cells prefer hair destiny in vivo, unless the injury of epidimal or sytogland occurs. In 1990, Cosarelis et al. proposed "The Bulge activated hypothesis", they think the signal moleculars emit from the dermal papillar induce the downward migration and differentiation of hair follicle stem cells.

然而，体内正常情况下毛囊干细胞首先向毛发谱系定向分化，只有在表皮或皮脂腺受到损伤时，它们才进行程序重组而向表皮或皮脂腺方向分化。1990年，Cosarelis等提出毛囊的&隆突激活假说&，认为来源于毛乳头的信号因子触发了毛囊干细胞向下迁移并分化，从而维持了毛发周期的正常循环。

The time to peak systolic longitudinal strain and the time to peak systolic radial strain were derived from the LV apical views , and to peak systolic circumferential strain was derived from the parasternal short axis. The standard deviation for time to peak longitudinal、circumferential and radial strain in the 18 segments (LS-SD18、CS-SD18、RS-SD18) and the maximal temporal difference of any two segments(LS-dif、CS-dif、RS-dif)were calculated as a strain-derived dyssynchrony index.

方法16例慢性心衰患者，获取心尖长轴观测量各节段收缩期纵向应变达峰时间，径向应变达峰时间，胸骨旁短轴观测环向应变达峰时间，计算CRT术后1个月、术后3个月18节段纵向、环向、径向应变达峰时间标准差(LS-SD18、CS-SD18、RS-SD18)、左室各节段收缩期纵向、环向、径向应变达峰时间最大差值(LS-dif、CS-dif、RS-dif)作为应变非同步指标。

From the pith to the bark, vessel-elements proportion increased to the 9th ring, reaching the maximum, and then decreased; fiber proportion increased fluctuate, contrary to the ray proportion; and the parenchym proportion is in degression in juvenile wood, and increase by degrees in mature wood.

组织比量径向变异表现为从髓心向树皮方向，导管比量先增加至第9轮达最大值，以后降低；纤维比量呈波动性递增特点，与射线比量相反；枫杨轴向薄壁细胞比量径向变异主要表现为幼龄材由髓心向树皮方向递减，到成熟材以后又开始递增。

In scales toward the extremes of the keyboard the upper arm uses small, pendulumlike motions while the body moves forward; in scales toward the center it will stay out at all times, away from the body as far as necessary while the body leans backward.

向键盘两端走向的音阶弹奏不太利用上臂，当身体向前运动时有点钟摆式的动作；音阶走向键盘中心弹奏时，上臂一直向外伸出，当身体向后倾斜时，上臂需要尽可能远离身体。

The26 year-old, whose performance at Old Trafford was marred by a seriesof complaints to referee Howard Webb, has escaped disciplinary actionfor petulantly kicking the penalty spot before Wayne Rooney's savedkick, despite Webb confirming to the Football Association that he wouldhave booked Torres had he seen the incident.

在上周比赛中托雷斯曾数次向主裁韦伯提出抗议。因为抗议主裁点球判罚而怒踢草皮的行为虽被免于责罚，韦伯赛后却向英足协表示原本该向托出示黄牌。

Root,immunoassay of ELISA(enzyme linked immunosorbent assay) was employed to determine IAA concentration in root tip, unilateral application of agar block containing IAA on root tip was carried out to investigate the effect of exogenous IAA on phototropic response.

为了研究生长素在水稻根负向光性反应中的作用，用含有IAA的琼脂块贴附在种子根的根尖表面观测IAA对根的生长效应，用ELISA法测定根尖的IAA含量，并对种子根弯曲部分进行半薄切片，结果表明：(1)种子根的生长方向既受光的调控也受外施的IAA的调控，根尖向贴有含IAA琼脂块的一侧弯曲生长；(2 )不定根在光照 1.5h后，背光侧的IAA含量明显大于向光侧；(3)种子根尖发生弯曲生长是伸长区的细胞不均等生长所致。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。