板层

Initial random imperfections of composite panels are assumed to be Gaussian random fields and simulated numerically from their mean and autocovariance functions. Lindstedt-Poincare's perturbation technique is employed to solve the resulting nonlinear equation in the vibration analysis of imperfect composite panels. Monte Carlo analyses are performed for detailed numerical calculations.

层板之随机性几何缺陷以高斯随机场来描述，并利用其平均值函数及自方差函数来做数值的模拟；以Lindstedt-Poincare微扰方法来处理缺陷复合层板之非线性运动方程式，并使用蒙地卡罗法来做详细的数值分析。

Our process capability: Plates: FR4, High TG FR4, high CTI FR4, high frequency materials, halogen-free materials, aluminum and other low-rise Materials :2-20 layer of finished copper thickness :0.5-5 OZ finished thickness: 0.2 -6.0mm Minimum line width: 3mil Minimum line spacing: 3mil smallest shape tolerances:+/-0.1mm minimum finished diameter: 0.1mm maximum thickness aperture ratio: 12:1 wide minimum solder bridge: 4mil characters minimum line width: 5mil Minimum height of characters: 30mil Solder Mask Color: Green, black, blue, white, yellow, purple characters such as color: white, yellow, black and other surface processes: spray tin, lead-free HASL, Electroless gold plating Shuijin, OSP, chemical Shen tin, silver and other chemicals Shen Process: Goldfinger, blue gum, Blind-via/Buried-via, characteristic impedance control, rigid-flexible combination of reliability testing such as: Open / Short testing, impedance testing, solderability testing, thermal shock testing, metallographic analysis of micro-slice curvature Isoptera: 0.7% flame retardant Level: 94V-0

我们公司的制程能力：板材：FR4、高TG FR4、高CTI FR4、高频材料、无卤素材料、铝基材料等层数：2-20层成品铜厚：0.5-5 OZ成品板厚：0.2-6.0mm最小线宽：3mil最小线间距：3mil最小外形公差：+/-0.1mm最小成品孔径：0.1mm最大板厚孔径比：12：1最小阻焊桥宽：4mil最小字符线宽：5mil最小字符高度：30mil阻焊颜色：绿色、黑色、蓝色、白色、黄色、紫色等字符颜色：白色、黄色、黑色等表面工艺：喷锡，无铅喷锡、化学沉金、电镀水金、OSP、化学沉锡、化学沉银等其它工艺：金手指、蓝胶、盲埋孔、特性阻抗控制、刚柔结合等可靠性测试：开/短路测试、阻抗测试、可焊性测试、热冲击测试、金相微切片分析等翅曲度：≤0.7%阻燃等级：94V-0

The reactor shield is an important part of CEFR, which is welded by two columniation shells, eight armor plates, five concrete plates and eight stiffening ribs.

屏蔽罩是屏蔽罩是CEFR的重要组成部分，由内柱壳、外柱壳、8层钢板、5层混凝土板及8块辐射状肋板焊接组成的封闭式罩形结构。

This is very important to whether the strength analysis or the design of composite laminates is carried.

这无论对层板的强度分析，还是对层板的设计，都是至关重要的。

The excessive use of paper and Board have quantitative and qualitative filter paper filter paper, filter paper, non-concenrated heatsealing-tea, chromatography concenrated, concenrated, industrial oil filter paper velcanized, J-140 oil filter paper, WJ-140 oil filter paper, J-85 oil filter paper, concenrated, diesel 5um fine C-170 diesel concenrated, diesel, filter-concenrated velcanized WC-150-paper, HM－180 aviation fuel filter paper, concenrated, concenrated, J－180 cotton gum gum concenrated M－150 cotton, non-leaching 530 concenrated, heatsealing concenrated, tea-K-120 air concenrated, concenrated, K-280 air K-80 air concenrated, 1＃ concenrated, concenrated, no. 2, no. 1, no. 2, micro-micro-concenrated, concenrated, 3＃ concenrated, 01Service, micro-luftfilter paper, 02 luftfilter paper, no. 03 luftfilter paper, 04, 05 luftfilter paper, luftfilter paper, S-06, luftfilter paper, desert air concenrated concenrated, MH-530, concenrated, C-180 1.5th-reliable gold cotton concenrated diesel concenrated, NC－220, concenrated, beer wrinkles 220 filter paper, in addition to the gingivalis concenrated, glass fiber filter paper, milk filter paper, jungsoo paper, mtastasis filter paper, precision grinder concenrated concenrated, hydraulic oil, activated carbon filter paper, activated carbon for radioactive gas concenrated CA、doped etrieve concenrated WG-59, corrugated paper, oil and gas separation and filtration of filter paper, slot filter paper, smoke meters with a filter paper, lead filter paper, high-temperature air filter paper, ion-exchange resin concenrated, concenrated, cationresin fiber is not removing bacteria-pingment shimian filter plate, pingment removing bacteria-net filter plate, pingment removing bacteria-net filter plate, concenrated SI wrinkles, high efficiency filter Corrugating medium, 69-gas mask filter paper, 69-clean air concenrated, 49-clean air concenrated, 0.1um concenrated, the rituals associated with high efficiency air wrapping paper, three concenrated.

过虑用纸和纸板有定量滤纸、定性滤纸、滤芯纸板、非热封型茶叶滤纸、色层分析滤纸、工业滤纸、机油滤纸原纸、J-140机油滤纸、WJ-140机油滤纸、J-85机油滤纸、5um细柴油滤纸、C-170柴油滤纸、柴油滤纸原纸、滤油纸、WC-150燃油滤纸、HM－180航空滤纸、J－180棉胶滤纸、M－150棉胶滤纸、未浸530滤纸、热封型茶叶滤纸、K-120空气滤纸、K-280空气滤纸、K-80空气滤纸、1号滤纸、 2号滤纸、1号微滤纸、2号微滤纸、3号微滤纸、01号空气过滤纸、02号空气过滤纸、03号空气过滤纸、04号空气过滤纸、05号空气过滤纸、S-06 号空气过滤纸、沙漠空气滤纸、MH-530滤纸、1.5棉机滤纸、C-180金子棉柴油滤纸、NC－220滤纸、皱纹220滤纸、啤酒过滤纸、除菌滤纸、玻璃纤维过滤纸、牛奶过滤纸、净水纸、癌细胞过滤纸、精密磨床用滤纸、液压油滤纸、活性炭滤纸、放射性气体测定专用活性炭滤纸、含合成纤维滤纸、无波纹板 WG-59过滤纸、油气分离过滤纸、缝隙过滤纸、烟度计用滤纸、铅烟过滤纸、耐高温空气过滤纸、离子交换树脂填充滤纸、阳离子交换纤维滤纸、未涂膜除菌型石棉滤板、涂膜除菌型液净滤板、未涂膜除菌型液净滤板、SI皱纹滤纸、高效滤清器瓦楞原纸、69型防毒面具过滤纸、69型净化空气滤纸、49型净化空气滤纸、0.1um高效空气滤纸、泡茶包装纸、三滤纸。

Based on the classic composites laminates theory,the stiffness matrix and the equivalent damping matrix of the laminates which can be described by elastic constants and damping constants were determined.

根据经典层板理论分别推导出了显含弹性常数和显含阻尼系数的纤维增强复合材料层板的刚度矩阵和等效阻尼矩阵。

In order to satisfy the special request in aero field, zero expansion coefficient is perfect.

应用遗传算法对层合板的泊松比进行优化设计的结果进一步证明了层合板具有特殊泊松比这一特殊的性能和设计的可操作性。

In the study of moisture absorption and desorption in composites, Fick s law is often used to describe the diffusion process of water in the composites.

在研究复合材料层合板的吸湿和退湿过程中，常常采用菲克定理来描述水分在层合板中的扩散过程。

The influence of initial imperfections on the stability ofcomposite laminated plates was studied by solving the nonlinear governing equations for laminated plates with elastical restraints subject to in-plane loading using the energy variational principle and nonlinear geometric equations incorporating the initial imperfection. The governing equations were solved using generalized Fourier series to obtain the effect of the non-uniform order term.

为深入研究初始缺陷对复合材料层板稳定性的影响，利用能量变分原理和考虑初始缺陷的非线性几何方程，建立了具有弹性约束的层合板在面内载荷作用下的非线性稳定性控制方程组，运用广义傅立叶级数法对其进行求解，并进一步获得了影响非线性稳定性控制方程组的性质的非齐次项。

Results show that glass fiber cloth laminate exhibited improved mechanical properties, which can be maintained even at high temperature of 150℃, with respect to conventional phenolic laminate.

结果表明，玻璃纤维布层压板的力学性能比普通酚醛树脂层压板有明显提高，在大于150℃高温下其性能仍能较好保持。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。