基床

The histopathologic observations of corneas after penetrating keratoplasty in dogs: Thestructure of wholly transparent graft was the same as that of host cornea apart from the upperdonor-host junction where there was minimal irregularity of the corneal lamellae. However, thecorneal lamellae at the lower donor-host junction were neat. The graft with its central part beingtransparent only showed poor coaptation with recipient, in which the graft shifted inward and had marked wrinkles and folds in Descemet"s membrane. On the back of Descemet"s membranethere was hyperplastic stromal fibers that thickened the graft and partially adhered to iris.

5犬穿透性角膜移植术后角膜病理组织学观察完全透明的植片与植床结构一致，仅两者对合处上部纤维紊乱，而下方纤维排列整齐；中央透明的植片与植床对合不良，植片向植床方向嵌入，后弹力层皱缩、折叠，植片下方因有来自植床的基质纤维而增厚，部分对合处与虹膜粘连；浑浊的植片有比较完整的上皮层，植片约2／3深度的基质丧失原来纤维整齐排列结构，代以大量成纤维细胞增生。

Methods A lamellar flap was produced in the rabbit cornea with a microkeratome. The flap interface in whole corneas and corneal beds were soaked in the rAAV –EGFP solution for 10 min, BSS solution was applied in the control group. The corneas were harvested at day 1, 3, 14, and 21 after application for the structure analysis of cornea by HE staining. Expression of the transferred gene was monitored by fluorescence stereoscope and laser confocal microscope. Results After 3d of infection with rAAV-EGFP ,slight fluorescence was detected in rabbit cornea by fluorescence stereoscope .

微型角膜刀制作兔角膜基质瓣；转染组用含rAAV－EGFP转染液浸泡角膜瓣和角膜基质床10 min，对照组用等量BSS液浸泡角膜瓣和角膜基质床10 min，不同时间点(1、3、7、14、21d)通过荧光体视镜观察角膜出现EGFP荧光的起始时间及分布情况，收集角膜，其中一半用激光共聚焦显微镜观察、照相，另一半固定后行HE染色。

In addition, the density of composite matrix could be controlled by altering the densifier addition to match the requirement of varying fluid velocity and expansion factor in expanded bed.

复合层析基质的柱层析行为表明：大孔型基质的洗脱峰形明显改善，柱压小，适合于高流速的固定床和扩张床层析；扩张床内可形成稳定的分级分布，符合扩张床吸附要求；可根据具体需要，调节碳化钨添加比例来优化操作流速和床层扩张率。

Base bed top layer ; unbound graded aggregate ; experimental study ; machiner y paving

基床表层；级配碎石；试验研究；机械摊铺

Test results are as follows: Ballastless track structures can effectively improve the dynamic action of train loads on subgrade beds, the measured stresses and acceleration rates are far smaller than those measured with ballasted track structures; axle loads have remarkable influence on dynamic stresses of ballastless track subgrades and have some influence on acceleration responses; speeds of either motor car units or freight trains all have limited effect on dynamic embankment responses; after attenuating over 3 meters high embankment, neither dynamic stresses nor acceleration rates are influential to net cushions at the bottom of column-net structure subgrades

结果表明：采用无砟轨道结构可以有效改善列车荷载对路基基床的动力作用，测得的动应力与加速度值均远小于有砟轨道结构测得的值；列车轴重对无砟轨道路基的动应力影响明显，对加速度响应也有一定影响；无论是动车组还是货物列车，其运行速度对路堤部分的动响应影响均有限；动应力与加速度经3 m 高的路堤后衰减，对桩网结构路基下部的网垫层已基本无影响。

The paper introduces a new technology of explosion to tamp the underwater stone-tossing base of ship outfitting quay.

介绍了用炸药爆炸方法使船用舾装码头水下抛石基床密实的新技术。

A new classical solution to the problem was offered by Shields (1963). His analysis was based on dimensional analysis. The threshold of particles on an originally plane horizontal bed are the tractive stress to and the lift force, see Fig.

一个新的解答这传统问题是由 Shields 在 1963 年提出的，他的分析是基于空间的分析，粒子开始时在水平平面基床是受于牵引力和提升力，参看图 7.5。

The results show that average 450 m2 foundation bed can be leveled a day,at most 600 m2 foundation bed a day.

介绍了基床悬吊刮道GPS定位整平工艺在长江口深水航道治理工程中的应用情况，着重介绍了工作原理、施工准备、施工步骤、技术要求和特殊情况下的施工问题。

900M3 thick granite tile finish (yellow rust litchi-China origin) bush hammered finish c/w 20mm screeding with average 50mm thick cement and sand mortar base; butt and jointed with cement and sand (1:3) mortar pointed in matching colored cement grout and laid on screeded bed

900立方米厚的花岗岩砖饰面（荔枝铁锈黄，中国原产地）剁斧石面，使用20毫米沙浆，平均50毫米厚的水泥砂浆基地；用水泥和沙子（ 1：3 ）砂浆对接和连接，匹配彩色水泥灌浆并浇注在刮平的基床上。

Is love's bed always snow?

爱的基床也总是舞动的冬雪吗？

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。