向后

The analysis indicates that the mean intensity distribution on the receiver plane is closely related to the ratio of the lateral correlation length to the surface root mean square height.

研究了粗糙目标对相干光场的散射，导出了在接收平面上光场的自相关函数、光强度的分布和光强度的二阶矩，在分析粗糙目标对激光脉冲后向散射的基础上，提出了后向散射光强度与目标均方根高度和相关长度的关系，阐明了粗糙目标的后向散射机理。

A self-drilling anchor (10) for use in a friable material (1) comprises a body (12) having an axis (13), a flanged rear end (14), a drilling front end (16) and a generally cylindrical portion (18) therebetween having an outer surface (20) with a thread (22) disposed thereon, wherein the body forks, beginning at a predetermined distance from the flanged rear end, into a first leg (24) and a second leg (26), the first leg extending forwardly into a drilling tip (28) and having a generally rearward facing shoulder (30) angled obtusely outwardly with respect to the axis, wherein the body (12) has an axial bore (32) for receiving an elongate fastener (2), the axial bore (32) extending substantially through the flanged end (14) and the generally cylindrical portion (18) and leading to the generally rearward facing shoulder (30), wherein the anchor (10) has a drilling mode wherein the second leg (26) nests behind the generally rearward facing shoulder (30) of the first leg (24), and an anchoring mode wherein the legs are pivoted apart from one another.

一种用于易碎材料(1)中的自攻螺钉(10)，包括：主体(12)，其具有中心轴(13)、带有凸缘的后端部(14)、用于钻孔的前端部(16)和位于所述后端部和前端部之间的通常为圆柱状的部分(18)，所述圆柱状部分(18)的外表面(20)上布置有螺纹(22)，其中主体从距离带有凸缘的后端部的预定的距离处开始分叉为第一腿(24)和第二腿(26)，第一腿向前伸入钻孔尖端(28)，并且具有相对于中心轴向外成钝角的通常面向后的肩部(30)，主体(12)具有容纳细长状紧固件(2)的轴向孔(32)，轴向孔(32)基本延伸穿过带有凸缘的端部(14)和通常为圆柱状的部分(18)，并且通向通常面向后的肩部(30)，螺钉(10)具有钻孔状态和固定状态，在钻孔状态，第二腿(26)套在第一腿(24)的通常面向后的肩部(30)之后，并且在固定状态，腿彼此转动分离。

Each subject performed three different PA glide techniques (PA glide with the thumb unsupported, PA glide with digital support and the PA glide with IP supported by the index) on a force plate while interphalangeal, metacarpophalangeal and carpometacarpal joints kinematics were tracked by a motion analysis system. The joint angles, maximum thumb-tip force, surface EMG activities of 8 thumb muscles and the Beighton score of each subject were recorded for analyses.

每位受试者在六轴力版上表现3 种不同的后前向滑动徒手技巧(不支撑后前向滑动，四根手指支撑之后前向滑动，大拇指指间关节支撑之后前向滑动)，藉由动作分析系统同步收取IP 关节、MCP 关节及CMC 关节动力学资料，每个大拇指关节角度、指尖的力量、8 块大姆指肌肉的表面肌电图以及每位受试者的柔软度分数。

By analyzing in detail the structural evolutionary history, from Mesozoic to Cenozoic, of different rift belts in western, northern, central and eastern Africa, the authors think that the Mellit area was on the northwestern shoulder of the South Sudan Rift. The rotation of the Mellit block toward northwest was the outward rotation of the northwestern shoulder of the South Sudan Rift during the rifting phase, and the rotation toward southeast was the inward rotation of the rift shoulder during the post-rift thermal sag episode.

经过详细分析非洲大陆西部、北部、中部和东部中新生代裂谷带的构造演化史后发现：Mellit地块实际上位于南苏丹裂谷带的西北裂谷肩上，该地块自晚白垩世初期至中新世初期，向NW方向倾斜是南苏丹裂谷带于裂谷化阶段造成的裂谷肩块体的向外旋转；该地块自中新世以来向SE方向倾斜是南苏丹裂谷带在后裂谷热沉降阶段造成的裂谷肩块体的向内旋转。

Kalamaili suture zone is an important plate boundary in north Xinjiang, and there are plenty of Neopaleozoic volcanic rocks around itThese volcanic rocks are enriched in LILEs and relatively depleted in HFSEs, and they are also characterized by high Nb, Zr, TiO2 contents and Zr/Y, Nb/Y ratios, and depleted SrNd isotopesThe characteristics of these volcanic rocks suggest that they were produced in postcollisional periodThe postcollisional volcanic rocks around Kalamaili suture zone become younger from west to east, which indicates that this suture zone entered postcollisional period gradually from west to east, and reflects that the Kalamaili Ocean had been closed gradually from west to eastAs to the Kalamaili suture zone in postcollisional period, the lithosphere extended and thinned, and the asthenosphere materials upwelled and melted partially, and intensive mantle convection occurred, leading to a plenty of mantlederived magmas underplating the suture zoneThe lithospheric mantle metasomatized by fluid in subduction period melted partially under decompression and high temperature, the resulting melts contaminated the underplating asthenospheric materials, and the erupted lavas became the Neopaleozoic postcollisional volcanic rocks

卡拉麦里缝合带是北疆的一条重要界线，沿该带广泛发育晚古生代火山岩。这些火山岩具有LILE相对富集、HFSE相对亏损的特征，且具有较高的Nb、Zr、TiO2含量和Zr/Y、Nb/Y比值，SrNd同位素主要表现出亏损的特征。综合分析表明，这些火山岩形成于后碰撞期。对卡拉麦里缝合带而言，从西向东后碰撞火山岩的时代逐渐变新，表明该缝合带从西向东逐渐演化进入后碰撞期，这从侧面反映了卡拉麦里洋盆是从西向东逐渐关闭的。对卡拉麦里缝合带而言，在后碰撞期，岩石圈伸展减薄，软流圈地幔物质上涌并发生部分熔融，加上地幔对流作用强烈，使得缝合带下产生了大规模的幔源岩浆底垫；先前在洋壳消减期被流体交代提取过的岩石圈地幔也在低压高温下发生部分熔融，形成的熔体混染了底垫的软流圈物质并喷发，形成了晚古生代的后碰撞期火山岩。

This article studied differences in postpartum fatigue and birth outcomes between women who pushed immediately and those who delayed pushing during the second stage of labor. Data were collected from primiparous women in their 38th to 42nd gestational week who did not receive epidural analgesia during labor and were free of complications during pregnancy. Using a quasi-experimental design, 72 participants selected by convenient sampling were assigned based on individual participant's preference to either an experimental or control group. For the experimental group, pushing was delayed until the point after full cervical dilation at which the mother felt a strong physical pushing reflex, the fetal head had both descended to at least the +1 level in the pelvis and turned to the occiput anterior position, and uterine contractions were at least 30 mmHg. For the control group, the physician instructed mothers to begin pushing after full cervical dilation at the point when the fetal head was in the occiput anterior position and uterine contractions were at least 30 mmHg.

本研究目的在探讨初产妇女第二产程立即用力与延迟用力对产后疲惫及生产结果的影响，收案对象为怀孕38-42周初产妇女、待产期间未施打硬脊膜外麻醉，且怀孕期间无任何合并症，於待产期间向其解释研究目的及收案方法后予以收案，采类实验设计法，以方便取样并依个案之意愿分派於实验组及控制组，实验组於子宫颈完全扩张后等到强烈想用力的感觉、胎头位到达坐骨棘连线下1公分以下、胎头位置转到枕前位、子宫收缩规律强度至少30mmHg才教导向下用力；控制组於子宫颈完全扩张后即教导向下用力，共收案72位。

The results show that the tilted rough ground generates cross polarization in the scattered signal, and reduces the copolarized signal.

计算结果表明，对于水平粗糙地面，相干叠加近似在高频和低频时同极化散射系数都有明显的后向增强现象，树的独立散射近似在高频段也有后向增强现象，这是由于枝干与地面以及枝干之间散射场在后向相干引起的明显增强。

Hereby, on behalf of 630 thousand Dujiangyan people, we express our greatest respect to leaders of all levels, cadres and masses on the front line, soldiers and officers from the Chinese Army, healthcare staff, pressmen, scientific and technological workers, engineering constructers, social workers, and volunteers, non-communist party members, members of Chinese Federation of Industry and Commerce, and all those who joined us in the quake-relief and post-quake reconstruction, especially to the 19 million Shanghai people!

在此，我谨代表知恩感恩的63万都江堰人民，向领导都江堰市抗震救灾和灾后重建的各级领导，向奋战在抗震救灾和灾后重建第一线的广大干部群众，解放军指战员、武警官兵、民兵预备役人员和公安干警，向医疗卫生工作者、新闻工作者、科技工作者、工程建设者、社会工作者和志愿者，向各民主党派、工商联和无党派人士以及所有参加抗震救灾和灾后重建的社会各界人士，向1900万上海人民致以最崇高的敬意！

That is, the business card printing and membership card making thousands of pieces of paper, in particular domestic uncoated paper or book paper occurs paper wool, paper powder in the rubber roller, imprinted on the edge of the paper and paper Mao superdirective (direction to bite or to drag-and-shoot direction), the not equal to the linear speed of the roller, only in the cylinder lining after business card printing and membership card when, in the rubber roller paper coated maoba non-directional well, then this data is only lining is the best, that is, until you reach the drum running as business card printing and membership card making ink plates and blankets, as well as on the status of the delivery is the best.

即制卡和会员卡制作几千张纸(出格是舶来胶版纸或书刊纸)后不离会不入现纸毛、纸粉粘在橡皮滚筒上，若痕迹边际的纸粉、纸毛有不圆向性(向咬口不圆向或向拖梢不圆向)，则表明不有到达滚筒线速度不不等，只有在滚筒包衬后制卡和会员卡制作时，在橡皮滚筒上纸粉纸毛堆得不有有不圆向性，那么这栽包衬数据才是最恶的，亦即滚筒调动到了运转最恶环境，制卡和会员卡制作历程洋油不朱在印版、橡皮布以及纸张上的传达是最恶的环境。

The results calculated show that the major contributions for the backscattering cross section come possibly from average cloud diameter, clear-air and humidity turbulence and also from distributions of cloud particles, especially, at higher frequencies.

再分析了云的后向散射机理，计算了西安地区云的后向散射截面；表明影响云的后向散射截面的主要因素为云滴平均半径、大气湿度湍流及云粒子分布，在较高频率时更显著。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。