夹层

The results show that the surface out-gassing is mainly responsible for the pressure increase, and that at 77K, the base pressure in the Dewar vacuum interlayer can be 5.0×10^(-4)Pa and maintained for a fairly long period of time.

研究结果表明：玻璃钢复合材料放气率是影响夹层真空度的主要因素；在液氮温度下杜瓦夹层动态真空度可达5×10^(-4)Pa，并可长期使用而真空度不变。

In this paper,trial-manufacture and application of sandwich structure on diamond drill bit were studied.

采用冷压成型夹层和加灰热压烧结法制备了一种夹层结构金刚石钻头。

In the current study it is difficult to be certain that the decreased aortic distensibility in aortic dissection were due to structural changes of the aortic wall, or simply reflected dilated aortic dimension and aortic valve regurgitation. Further study is necessary to elucidate the underlying mechanisms for this abnormalities.

本研究用无创的超声技术证明主动脉夹层之升主动脉扩张性明显降低，这对主动脉夹层病因学的进一步深入研究无疑具有重要意义；但其降低是由于血管本身结构异常所致还是继发于血管内径的扩张尚有待进一步深入研究。

Therefore the dispersion curves obtained in the field are primarily consisted of the first mode. For a heterogeneous elastic solid consisting of three homogeneous layers whose interlayer has low velocity, the phase velocity V〓 of the first mode will also close up to the Rayleigh wave velocity of the bottom layer when frequency f→OHz, but V〓 of the first mode will close up to the shear wave velocity of the interlayer when f→∞, and there is a cut-off frequency at high frequency region for the first mode and V〓 close up to the compressional velocity of interlayer when interlayer is liquid.

当三层固体介质中存在软夹层时，若f→OHz，则其基阶模式的相速度V〓→V〓（V〓为最底层介质的瑞利波速度）；若f→∞，其基阶模式V〓→V〓（V〓为中间层介质的横波速度）；若三层介质中存在液体夹层，当f→OHz时，基阶模式V〓→V〓，而基阶模式在高频段存在一个截止频率，截止频率处的瑞利波速度V〓→V〓；由此可判定，野外实测的相速度频散曲线不仅有基阶导波模式，同时还应有高阶导波模式波的存在，接收信号中存在模式间的跳跃，因此频散曲线会产生"之"字形现象。

Based on ANSYS and SYSNOISE software, How the thickness, stiffness, boundary conditions, material density, elastic module and damping factor of viscoelastic structure to affect the sound radiation is discussed in the paper, then some useful conclusions are drawn from them, which will give engineers a guideline to choice the optimization damping.

最后，本文对粘弹性阻尼夹层板结构的声辐射进行了计算，并研究夹层板结构的厚度、加筋方式、边界约束条件、板材、厚度、材料弹性模量、阻尼材料损耗因子、阻尼层密度等参数对声辐射产生的影响并进行比较，得出了一些有益的结论，为最佳阻尼的处理提供了一定的依据。

The principle could be expressed by dissolving upward gradationally to ensure the continuity of the border of solution mined cavern considering of its security and stability.

水溶建腔优化设计原则，就是考虑到溶腔的安全性、稳定性，根据建腔周期的要求、采盐浓度的要求，自底向上分阶段溶蚀，保证溶腔形状的连续性，对于含夹层非均质盐岩地层，应根据夹层状况对水溶建腔的设计参数作相应的调整。

The design, the conformation and the construction of a 5-story base-isolated frame structure in Xinyi City are introduced. The mechanical behavior of a base-isolated frame structure using lead rubber bearings and using non-full-lead rubber bearings is compared and analyzed. This isolated building has been set up.

分析了框架结构采用非满高铅芯夹层橡胶垫基础隔震时的性能，并与采用普通铅芯夹层橡胶垫基础隔震的框架结构进行了对比分析。

Silicalites, predominated by pelitic silicalite, occur in collisional zones and back-arc basins. In the collisional zones, they occur as rock sheet as an important part ofophiolitic mé lange, belonging to ophiolitic mélange type silicalite. In the back-arc or interarc basin, they occur as pelitic silicalite intercalation varying in thickness, characteristic of "silica merl",and belonging to abyssal back-arc basin type or carbonate type silicalite. In the magmatic arc, they occur as intercalation related to volcanic hydrotherm or volcalic exhalation, belonging to volcanic arc type silicalite.

在硅质岩方面：冈底斯构造带侏罗系硅质岩主要属泥质硅质岩，在各个碰撞结合带和弧后盆地中均有产出，主要的产出状态有：①在碰撞结合带中呈岩块产出，构成蛇绿混杂岩的重要组成部分，属蛇绿混杂岩型硅质岩；②在弧后或弧间盆地中呈厚度不等的泥质硅质岩夹层产出，常具"硅灰泥"特征，属弧后深水盆地型硅质岩；③呈夹层状产于弧火山岩系中，属火山热液或火山喷气型硅质岩。

The first, A finite element method to compute the natural frequency of sandwich plates is found.

首先对粘弹性复合夹层结构的固有频率和动力响应进行研究，给出了一种计算粘弹性阻尼夹层板结构动力响应的方法，并编制程序进行求解。

Corrugated board is a kind of sandwich structural materials and it can be studied as an orthotropic sandwich plate.

瓦楞纸板是夹层结构材料中的一种，可以将其作为正交各向异性的夹层板来进行研究。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。