成对的

Based on integral transformation, analytical solution for the wave transmission equations in 1-D inhomogeneous media is derived. By dividing the media into layers and considering the continuous conditions between the interfaces, the transfer matrix of amplitude of waves is obtained.

利用积分变换，用解析方法求解了一维非均匀区域的不同性质对弹性波传播时波幅变化的影响；将非均匀区域离散成均匀的薄层，结合相邻层的连续条件，建立了数值解法的波幅传递矩阵。

Any of various annelid worms of the class Polychaeta,including mostly marine worms such as the lugworm,and characterized by fleshy paired appendage s tipped with bristles on each body segment.

多毛目环节动物多毛目中的任一种环节动物蠕虫，主要包括海生蠕虫，如海蚯蚓，特征是其身体的每一节上都长有尖端带刚毛的、多肉的成对附属物

Any of various annelid worms of the class Polychaeta,including mostly marine worms such as the lugworm,and characterized by fleshy paired appendages tipped with bristle s on each body segment.

多毛目环节动物多毛目中的任一种环节动物蠕虫，主要包括海生蠕虫，如海蚯蚓，特征是其身体的每一节上都长有尖端带刚毛的、多肉的成对附属物

The annulation of stilbene compounds were studied. Phenanthrene derivates-interme diates of tylophorine were synthesized by annulation from-2,3-bis(3,4-dimethoxyphen yl)acrylic acid and-2,3-bis(3,4-dimethoxyphenyl) acrylonitrile with phenyliodine diace tate as a friendly and high efficient catalyzer.The route was first reported, whose application foreground would be promising.The catalyzer will be used to study of synthesi- zing a series of new phenanthrenes.

本文还探索了简单类化合物关环反应，并研究出用廉价高效对环境友好的催化剂-二乙酸碘苯成功地将类化合物－3，4-二甲氧基-α-(3，4-二甲氧苯基)-肉桂酸和-2-(3，4-二甲氧苯基)-3-(3，4-二甲氧苯基)-丙烯关环形成相应的菲环衍生物－娃儿藤碱重要中间体，此方法在国内尚属首次，具有重要的应用价值，此外可用此催化剂研究一系列类化合物的关环反应。

For the request of the high resolution ability of X-ray imaging, the inorganic scintillating materials with high effective atomic numbers and high density are studied intensely.

针对X射线高分辨成像的要求，具有较高有效原子序数和较大密度的无机闪烁材料成为当今研究的热点，重点阐述了溶胶－凝胶法制备这类闪烁薄膜的研究现状，并对其今后的发展进行了展望。

The focal hepatic lesions can be easily diagnosed and distinguished according to DWI, ADC value and their changing characteristics.

依据磁共振弥散成像的DWI图像、ADC值及其变化规律，能比较准确的判断肝脏局灶性病变的性质，对其的诊断及鉴别诊断有一定价值。

The focal hepatic lesions can be easily diagnosed and distinguished according to DWI, ADC value and their changing characteristics. So, DWI has an important clinical value in the diagnosis of focal hepatic lesions.

依据磁共振弥散成像的DWI图像、ADC值及其变化规律，能比较准确的判断肝脏局灶性病变的性质，对其的诊断及鉴别诊断有一定价值。

First, the fundamental theory through the activity-based costing is begrimed with, to that the means connotation. The analysis has been underway to the fundamental move of distinguishing feature along with implementation, there was the preliminary comprehension.

首先，从作业成本法的基本理论入手，对该方法的内涵、特点以及实施的基本步骤进行了分析，有了初步的了解。

The general principle of RR STAP is addressed in this paper with the result that the output signal to clutter plus noise ratio will be probably near as or even better than that of full rank STAP. Thereby, the final detection performance of practical airborne phased array radar won't necessarily be degraded when rank reduction is operated properly. There exists two basic types of adaptive processor, one is Direct Form Processor and the other is Generalized Sidelobe Canceler .

降维可以在空域、时域或时空联合域进行，无论在哪个域内进行，都可以等效成对全空时数据矢量施以一个降维变换矩阵Q〓，如果Q〓与数据的特征结构无关，那么这类降维处理器的结构预先也是固定的，如果Q〓与数据的特征结构有关，即STAP在特征子空间内进行，那么所选择的子空间不同，STAP性能也不一样。

Animation, city editor, resemble from the definition 摄 these new chemical elementses in angle will make Need for Speed:The Undercover becomes the big stomach in a hard dish king.

动画 ，城市编者，从定义摄角的这些新的化学 elementses 相似将会制造对速度的需要：秘密者成为难的盘子国王的大胃。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。