查询词典 db

Generally, the cross flow fan operating noise totally about 55 dB, but in the midnight when prominent frequency noise has become extremely annoying. This research attempted to different axial configurative tongue designed to improve penetrating single frequency noise of cross-flow fan.

一般而言，横流扇的运转噪音约55dB左右并不算大，但是在夜深人静时某些特别突出的单频噪音却显得极度恼人，因此本研究尝试以不同之轴向舌端构形设计来改善横流扇之尖锐单频噪音；并将录制之声音以音质参数分析，找出较佳的舌端与叶轮扭转角度搭配。

This research change axial configurative tongue design with aperture or comb shaped ; and adopt laboratory tests to verify its feasibility. The results be proved these different changes can decrease cross-flow fan BPF peak, in particular reduce 8 dB noise effects at specific rpm.

本研究提出改变状轴向舌端构形之设计，采以实验方法来验证其可行性且结果显示具梳状与穿孔形之舌端可有效改善横流扇之声音品质及BPF 基频峰值，在特定转速下可降低8dB之效果。

They consist of a coplanar wave-guide transmission line periodically loaded with 8 - 32 metal bridges, functioning as capacitive switches. Every switching element consists of a thin metallic membrane actuated by applied bias. Remarkable phase shifter performances were observed. 2 lAl0.96 Si0. 04 bridges MEMS Phase shifter reached to 372/3. 5mm under 20V bias at 35 GHz, the with an insertion loss (S21 of about 4 -7 dB...

该文介绍毫米波MEMS相移器的设计，研究低损耗衬底，Au，AlxSi1-x可动膜对下拉电压和传输损耗的影响，测试表明：21桥相位连续可调的分布式压控开关阵列一毫米波相移器在35GHz时，启动电压5V，20V时相移量达到372°/3.5 mm，并能在不同的控制电压下根据要求改变相移量。

Fiber attenuation was measured as 6.84dB/m at 1550 nm by the cutback method.

采用剪断法测得在1550 nm波长下光纤的传输损耗为6.84 dB/m。

Analysis on the current condition of the database access on Traditional Call Center, including advantages and disadvantages of C/S model.

根据呼叫中心的开发思想，结合OCI、DB-Library数据库访问接口的设计理论，研究了现代呼叫中心数据库接口的实现及其技术。

DB. I think that's right.

贝：我觉得是正确的。

In my view, the noise level which does not exceed 38 dB is acceptable, but not more.

在我看来，噪音不超过38分贝，是可以接受的，但并不多。

It would be as simple as it sounds if the DB was empty, but it's not.

这将是像听起来那么简单，如果数据库是空的，但事实并非如此。

It is designed for the content management of DB.

它设计为完成数据库的内容管理。

Next thing you know, my db won't start...

接下来的事情大家都知道，我的数据库将无法启动。。。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。