缝隙

A novel V-shaped slot antenna with a small right-angle triangle of supplementary slot is presented. The slot clement is fed by an arrow-shaped terminal of a microstrip line printed on the other side of substrate, and its good impedance matching is achieved by adjusting the area of this triangular supplementary slot.

提出了一种新颖的V形微带缝隙天线，地板上开一个直角V形缝隙，在V形缝隙的顶角处附加一个小直角三角形补偿隙，通过改变三角形补偿隙面积的大小可以对天线阻抗匹配进行优化，由基片另一侧的箭形微带线终端对缝隙单元馈电。

The gap method is better than other methods to calculate the infiltration amount of wind through windows and doors gap, but the infiltration characteristic exponent of the gap method is influenced by some factors, such as differential pressure、fluid state、gap width、geometrical shape etc, It's Range of.

相对于其它方法，缝隙法可较准确的计算通过门窗缝隙的渗风量，但是缝隙法中的渗风特性指数受到压差、空气流态、缝宽、缝隙几何形状等因素的影响，变化范围在0.5～1.0之间，工程应用中一般取0.67，这给渗风的计算带来很大误差。

We make the effect width shorter and the effect length longer to decrease the leakage current by the seams in the poly-resistor. There are two kinds of seam in our thesis. One shape is spiral and the other is like a concentric circle.

我们将复晶矽电阻开缝隙，使元件电极看到的复晶矽电阻等效宽度变小或等效长度变大，藉此降低漏电流，本论文有同心圆缝隙及螺旋型缝隙两种结构。

At the early stage of immersion,the corrosion potentials in the crevice shifted towards positive.

在缝隙腐蚀的初期，缝隙内金属腐蚀电位随着缝隙腐蚀的发生逐渐正移。

The crevice corrosion rate of 00Cr25Ni22Mo2 in oxidative medium is much greater than that in reductive medium, but the law for titanium quite the rev erse. There is much effect of temperature on the crevice corrosion rate.

结果表明：在有缝隙的情况下， 00Cr25Ni22Mo2不锈钢在氧化性介质中的缝隙腐蚀速率明显大于在还原性介质中的缝隙腐蚀速率；工业纯钛则恰恰相反。

A calculating method to determine the clearance size of the rudder face along the extension direction of the swept-back wing for airplane is presented, which can be used for calculating the clearance size of the rudder face at limiting deflection angle, and point out that several parameters for determining the caearance is essential .

本文针对某型无人机翼面、舵面设计，首先导出了一种确定后掠翼舵面展向缝隙尺寸的计算方法，使用该方法能够定量地计算舵面在极限偏转角下缝隙的尺寸，并指出决定舵面缝隙大小几个主要参数，为舵面缝隙设计提供了可靠依据。

With oil,gas,water as working fluids,the experiment studies of frictional pressure drop characteristics of oil gas,gas water two phase flow in vertical helically coiled tubes were carried out.

mm中采用两种直接取压方式-缝隙取压和小孔取压，对单相摩擦阻力特性进行了实验研究，并通过改变缝隙宽度，研究缝隙宽度对压降测量偏差的影响。

OBJECTIVE: It is hypothesized that arrhythmia can be treated by changing Cx levels and intervening abnormal GJ channel. Moreover, to explore the effects of bone marrow mesenchyma stem cells on the expression of Cx43 and Cx45 in rats with myocardial infarction.

目的：课题组假设通过改变缝隙连接蛋白水平、干预异常的GJ通道，来尝试治疗心肌梗死后心律失常，为此探讨同种异体骨髓间充质干细胞移植对心肌梗死大鼠缝隙连接蛋白43及缝隙连接蛋白45 mRNA表达的影响。

The characteristics of the three main parts of mono-pulse slotantennas——longitudinal radiating slot, center-inclined slot and magic T using couplingslot, are analyzed. Also the influence of the design parameters, such as the length and width of the slot etc., are analyzed. The engineering curves of design are given, and some beneficial conclusions are gained too. These also give powerful supports for the design of slot antennas.

针对毫米波单脉冲波导缝隙天线的三个主要组成部分——波导宽边辐射纵缝、波导宽边中心斜缝和宽边缝隙耦合魔T的特性及其各项设计参数(如缝隙长度、宽度、半高波导、全高波导等)对性能的影响进行了较为全面、详细的分析，给出了相应的工程设计曲线，得到了一些有益的结论，为高性能波导缝隙阵列天线的设计提供了有力的参考。

In this thesis, the radiation principle and the structure of slot antenna are studied and the impacts on its performance of every structure parameter in a slot antenna design are analyzed. On this foundation, a design plan of planar slot array antennas is proposed. The design has some structural feature as follows:(1) with different dielectric layers and microstrip line structure to guide the electromagnetic wave effectively;(2) the feeding network formed of microstrip line can match with the radiating slots expediently;(3) in order to increase the bandwidth of the antenna, the wider slot and branched feeding microstrip line are adopted to form a double resonance.

本文对缝隙辐射的原理、缝隙天线的结构作了探讨，分析了缝隙天线设计中各结构参数对其性能的影响，并在此基础上提出一种平面型缝隙天线的设计方案，它具有以下的特点：(1)采用分层结构，以不同的介电系数和微带线结构形成对电磁波的有效引导；(2)利用微带线构成馈电网络可以方便地与辐射缝隙进行匹配；(3)增大缝隙的宽度，并利用馈电微带线的枝节形成双谐振，以增加天线的带宽。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。