成层的

The result from the three simulation model continues that two step synthesis method is one effective ray tracing method.Because it can accurately persue the least travel time of ray fast and have very strong antinoise nature, so it can be used to the complex medium tomography analysis.

通过构造的数值模型验证了改进算法，表明该算法是一种有效的射线追踪方法，能快速准确的追踪射线的最小走时数据并且具有很强的抗噪性，可以应用到复杂介质的层析成像中。

In this paper, Plate Girder Element and Virtual Laminated Element were used to analyze P.

中文题名预应力混凝土斜拉桥施工控制研究副题名外文题名 Construction control study of P.C.cable-stayed bridge 论文作者施笃铮导师徐兴项贻强教授学科专业结构工程研究领域\研究方向学位级别博士学位授予单位浙江大学学位授予日期2002 论文页码总数123页关键词预应力混凝土斜拉桥施工控制斜拉桥桥梁施工馆藏号BSLW /2002 /U448 /36 本文用平面杆系理论和空间虚拟层合单元法，在对预应力混凝土斜拉桥整桥结构进行分析的基础上，用正装迭代法对该斜拉桥进行分阶段施工仿真分析；又通过建立有约束的非线性优化模型，对预应力混凝土斜拉桥的施工控制参数（初始张拉索力和立模标高）及成桥状态进行优化，进而建立预应力混凝土斜拉桥施工控制系统。

Objective To investigate the relationship between upper airway CT measurements and apnea hypopnea indexes of patients with obstructive sleep apnea hypopnea syndrome. Methods The pharynxes of 42 patients with OSAHS were scanned by CT during normal respiration and deep inspiration.

目的 应用多层螺旋CT对阻塞性睡眠呼吸暂停低通气综合征患者的上气道成像，探讨上气道各平面的测量参数与睡眠呼吸暂停低通气指数的相关性。

R ESULT S: Strong specific staining for Smad1,4,5 was detected in the odont oblasts of normal and carious teeth. Weaker staining was observed in the u nderlying cell-rich layer and pulp core.

结果：Smad1，4，5在正常和龋坏牙髓的成牙本质细胞层呈强阳性表达，在下方的富细胞区及牙髓中心部位为阳性或弱阳性表达，炎症牙髓浸润的炎细胞中Smad1，4，5呈强阳性表达。

T his restricts the transition of reaction gas and causes bubble formation at the interface.

氧化产物与基体形成的致密层减缓了纤维的进一步氧化，并阻碍氧化气体的排除，在界面形成大量气泡。

Electrostatic potential and velocity of water molecules across the channel are also calculated in continuum theory for comparison.

模拟结果显示，双电层内的静电势大体上成线性下降，偏离了连续性理论的预测曲线；分子动力学方法所得到的流速值要比与连续性理论预测结果低50%。

Through analysis on the structure of valence electron shell,the atom radius,the bonding orbital and other important parameters,this paper discusses the irregularity in the second circle of nonmetal elements and the irregular courses.

本文通过对第二周期元素价电子层结构、原子半径、成键轨道及其重要参数的分析，讨论了第二周期非金属元素的不规则现象，并且分析了产生这些不规则性的原因。

ABSTRACT The process tomography is a new detecting technique, which is very important in two-component measurement.

过程层析成象是一项新的两相流检测技术，对于相关的科研和设计工作以及生产过程的安全高效运行均具有重要意义。

Produced with imported raw materials and advanced technology, this product can rapidly clear the wax layer of new cars.

用先进技术用进口原料精制而成，能快速清除新车的蜡层，不损伤漆面，便于后续的抛光或上光，尽显新车的亮丽色彩。

At some branches, double cheeseburgers are being sold with one slice of cheese instead of two, and renamed "double hamburger with cheese."

有些麦当劳的双层汉堡减少了一层奶酪，并把它的名字改成了&带奶酪的双层汉堡&。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失