材

The objective of this paper was to investigate the possibility of a transverse vibration technique for assessing static bending, tensile and compressive strength of structural lumbers.

共选择了186根尺寸为38 mm 89 mm 3 658 mm的加拿大针叶树商品材云杉-松-冷杉的建筑结构材作为试验材料，探讨采用一种横向振动技术来评估这些规格材的静态抗弯、抗拉和抗压强度的可行性。

Third, drying defects and mechanical performance were determined, and the microstructure of the small-diameter lumber was observed with scan electron microscope. The drying quality of lumbers was assessed too.

第三，本试验对不同干燥方式下小径木锯材的可见干燥缺陷和力学性能进行了测定，同时，采用扫描电镜对干燥后小径木锯材的微观结构变化进行了观察，并对锯材的干燥质量进行了评定。

This paper introduces a production process and technology of the Preserved Flower as follows: the selection and acquisition of flowers, the dehydration and decoloration, the retaining of the shape , the softening of flowers'color, the drying, the processing, the finishing as well as the preservation .

本文从花材的选材与采集、脱水与脱色、花材的护形、花材的软化上色、干燥处理、加工整理与保存等方面阐述了保鲜花的制作流程和技术。

The web perforation can provide space for electrical conduits and bracing. Therefore, it has the meanings and motive for the study of C-shaped section with web openings. The strength of a compression member can be influenced by the section shape, thickness of section, length of member, and support condition.

不过，构材之厚度、加劲与未加劲、是否开孔、上下两端之接合方式，皆会影响受压构材之抗压能力，所以目前先针对C形断面构材的开孔与否及上下两端之接合方式，分别以两种尺寸来讨论，并藉由有限元素分析软体ANSYS 6.0版，来模拟构件受压时，断面的应力分布情形。

The water transport efficiency in ring-porous species vessels is higher than that in diffuse-porous species and none- porous species, but ring-porous species vessels more easily occur embolism.

环孔材树种导管比散孔材导管和无孔材管胞输水效率高，但它比后两者更容易发生空穴和栓塞。

The primary aim of this experment was to make clear the photosynthetic characteristics of eggplant.The photosynthetic charateristics of different varieties, nodes, growth and development stages and the effects of photo, CO2 concentration and temperature on Pn of own-rooted seedlings in eggplant;the photosynthetic charateristics of grafted seedlings that cions were grafted on rootstocks; the effects of low temperature(10/5 ,day/night) and poor light(60mol.m-2.s-1 and l20mol.m-2.s-1) on photosynthetic and other physiological characteristics of own-rooted seedlings in eggplant with four and five leaves were studed.

以茄子自根苗为试材，研究了不同品种、不同叶龄、不同叶位、不同生育期单个叶片的光合特性及环境因子对盛果期功能叶片Pn的影响；以托鲁巴姆、CRP为砧木，二苠茄和快圆茄做接穗所得的茄子嫁接苗为试材，研究了嫁接苗单个叶片光合特性及环境因子对嫁接苗功能叶片Pn的影响；以自根苗幼苗(4-5叶)为试材，研究了低温(10／5℃)弱光60μmol.m~(-2.s~(-1)和120μmol.m~(-2)。s~(-1)对茄子幼苗光合及其它生理特性的影响。

The paper introduced determination on specific heat capacity and thermal conductivity of Hot Pressing ZnS target material by laser flash process;Moreover introduced measuring method for line expansion coefficients and bend strength of HP ZnS target material .

试验证明：热压 ZnS靶材有较好的热导率，在C D-R W的上下介电层应用上为记录层提供了很好的散热效果； ZnS靶材的线膨胀系数较低，有很好的尺寸稳定性； ZnS靶材有一定抗弯强度

The simulation results of the cylinder-block model were given in the article, consistent with that of Middlemen"s. It was shown that the block part could improve the uniformity of the flow distribution. The analysis of the flow field of some materials with different power-law factor in the die designed by Mckelvey was close to that of Mckelvey"s. It was shown that the flow distribution was uniform in the die that can producesheets with 1200mm in width. During the analysis the flow channel was divided into several parts to get the details about the fluid flow in each area. A conclusion was drawn after analyzing the influence of the die pressure on the flow distribution, that the higher pressure is good for the output and bad for the uniformity of the distribution. Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial. The uniformity of the non-block flow channel was so poor that the block in the proper position of the die channel was necessary. The project of the die for the wider sheet was put forth, and the analysis of the fluid flow in the die was shown.

本文模拟了圆柱管缝隙流模型的三维流动场，得到了与Middlemen结论一致的流动均匀性，并通过模拟直观地展示了采用阻尼块可以改善挤出均匀性的现象；分析了多种幂率指数的流体在Mckelvey等人设计的流道模型中的流动分布，得到了与Mckelvey的分析结果接近的压力降和流量偏差；本文建立了1200mm幅宽机头流道的三维有限元模型，并逐个分析各个区域和多个截面的流动分布状况，由此揭示了1200mm幅宽L-型机头流道内的流北京化工大学硕士学位论文动分布基本均匀，并在分析了机头压力对于挤出流动分布的影响后得出结论：较高的机头压力可以获得较大的产量，但是不利于物料均匀分布；模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；模拟了两端进料式圆柱管无阻尼流道的流动均匀性后得到结论：两端进料式无阻尼结构的流动均匀性较差，宽机头中仍然有必要设置阻尼块；确定宽幅机头流道的基本方案，并设计了一种宽幅防水卷材挤出机头流道的结构，通过流动模拟表明该种结构的流动均匀性较好；考察了宽幅机头对于不同厚度片材的挤出适应性，得到结论：当生产不同厚度的片材时，阻尼块高度需要调整。

The book is certainly packed with designes and Wally has combined this with a series of appendix including details of suitable seasonal foliages, possibly more importantly; unsuitable flowers for bridal work, a seasonal calendar of suitable flowers and two pages on techniques – all of which are incredibly useful.

Wally在书中提供了一系列目录，里面包含适合的季节性叶材的细节，这或者是更重要的；一些不适合用在新娘花艺中的花材，适用花材的出现季节一览表，还有两页内容关于技巧方面的----所有这些真的非常有用。

In the process of the design of gas detector, it is usually by the ways of refer to the energy response graphic of the working gas and the material for the chamber to choose the working gas and the material for the chamber.

而在一般的气体辐射监测器的设计中，工作气体及壁材的选取基本上都是通过查阅相关气体及壁材能量响应曲线的工程图表，以确定具体的工作气体及壁材。

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。