中板的

Therefore, combined with the past experiences of the optimization of satellite structures and based on the characteristics of honeycombed sandwich panel which is used a lot in the satellite structure, we propose an equivalent panel modeling method and it can avoid the inconveniences of design variables of honeycombed sandwich panel.

为此，作者结合卫星结构设计方面的经验，并根据卫星结构中大量应用的蜂窝夹层板的特点，提出了等效蜂窝夹层板和考虑板间连接刚度的一整套方案，为建立简单可靠，使用方便的卫星结构有限元模型提供了有效的方法，从而避免了蜂窝夹层板选取设计变量方面的诸多不便。

The major works in this thesis are: The effect of the straight and skew cracks on the vibration properties are studied for the cantilever beam, clamped-clamped rectangular plate, simple-supported rectangular plate and triangular plate. The effect on the natural frequency and vibration mode shapes of the bracket in the presence of cracks is discussed Based on the available index of crack diagnosis, a new index, is proposed.

本文主要的工作有以下几个方面：★研究了工程中常见的悬臂板、四边刚性固定矩形板、四边简支矩形板和三角形板的直裂纹和斜裂纹对振动特性的影响。

The heat transfer plates in the assemblies have spaced apart dimples for maintaining plate spacing and oblique undulations with the undulations on adjacent plates preferably extending at opposite oblique angles.

在组件(40)中的传热板(44，48)具有用以保持板的间距的相分隔开的凹坑(54，56)，该传热板还具有斜向的波纹，在相邻板上的波纹(52)优选地按相反的斜角延伸。

Substituting the dynamic model of a two-dimensional piezoelectricactuator into laminated piezoelectric plates,this paper transforms a problemof the laminated piezoelectric plates into the superimposition of a pureproblem of classical laminated plates and a pure problem of electrostatics,which gives another method for analyzing laminated piezoelectric plates.Themethod has advantages of simplicity,and practicableness.

将二维压电致动器的动力学模型应用于一般压电层合板结构中，本文将一压电层合板问题转化为一纯的经典层合板力学问题和一纯的静电学问题的简单组合，便给出了另一分析压电层合板的方法。

Based on the research production, with three prestressed concrete hollow slabs from the bridge in active service for ten years, this essay studies the ultimate bearing power ,the load-bearing failure mechanism and structure reenforcement measures influence on them, through examination of each performance index, failing load test, theoretical analysis and computing research work.

对预应力混凝土桥梁结构在使用中存在的问题及国内外相关研究发展水平进行了综述，指出目前对旧桥预应力混凝土空心板实际极限承载能力进行相关研究的必要性及其重大意义； 2、对旧桥预应力混凝土空心板的混凝土强度、碳化深度、预应力筋的锈蚀状况以及裂缝状况的检测评定； 3、通过破坏荷载试验，对损伤旧桥预应力混凝土空心板的受力性能进行试验评定； 4、采用在桥面做混凝土叠合层的加固措施，通过破坏荷载试验对加固后的旧桥预应力混凝土空心板的受力性能进行评定； 5、提出在役旧桥预应力混凝土空心板的维护、加固和使用建议。

Different kinds of glass did not have the visibility difference on standard roentgenogram, though the metal compounds used in the tinted, reflective, and mirror glass had made their Hounsfield values higher than plain glass.

虽然色板玻璃、反射玻璃以及镜板玻璃中使用的金属成份使得它们比明板玻璃有较高的断层摄影呈像指数，然而一般的X光摄影多能清楚地显像而没有显著差异。

It can fulfill automatic control on swash plate of

它通过对发动机转速信号、大气总温信号的处理，解算出斜板的理论位置，与斜板的位置传感器信号进行比较，其差值作为控制信号经放大后控制电液伺服阀带动作动筒，使斜板向减小差值的方向运动，从而实现对飞机进气道斜板的自动控制。在这一系统中

The repulsion is to be expected when the two parallel slabs have different electromagnetic properties. By studying different cases containing ordinary materials and metamaterials, we found that the repulsive behavior may possibly appear when the wave impedances, which are used to demonstrate the difference of electric and magnetic properties between two slabs, are smaller and larger than the impedance of vacuum, respectively, and moreover, the greater the difference between two wave impedances, the more easily the repulsive force is obtained.

排斥的Casimir作用力只可能出现在两不同平板的情况中，而通过考察正常材料与特异材料介质的不塑料托盘同组合情况，我们发现板间媒质阻抗的值介于两板的阻抗之间且两板阻抗比与板间媒质的差异越大，Casimir排斥力越容易产生。

According the stiffness of bearing plate, the deformation test of bearing plate method is divided into rigid bearing plate method and flexible bearing plate method. Adaptation range of the two tests are stipulated according to regulations.

承压板法变形试验根据承压板的刚度分为刚性承压板法和柔性承压板法，两种试验方法的适用范围在规程中均有相应的规定。

In this paper, in accordance with Biacob plate-bending theory, analytical solutions of bending problems of rectangular plates are presented.

本文根据符拉索夫平板理论，提出了矩形板弯曲问题的解答格式，应用本文中的(8)和(9)式，可求解通常边界条件下，承受横向均布力q_0以及承受横向均布力和板边法向弯矩等组合荷载共同作用下的矩形中厚板的弯曲问题，而且使这类问题的解析解规律化。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。