dB

Conclusions According to results obtained and the realistic situation in China, it is appropriate to set the threshold limit of noise exposure at 85 dB ( A)( 8 hours exposure per day).

结论根据研究结果和我国实际情况，噪声标准中接触限值（8h接触）定在85dB（A）为宜。

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DB: People have made this association for a couple of thousand years at least.

DB: 人们把狮子比作“百兽之王”至少有几千年了.

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DB : This is Earth and Sky.

DB: 这里是“地球与天空”频道.

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The Rails front end handles rendering, cache composition, DB querying and synchronous inserts.

Rails前端处理展现，缓存组织，DB查询以及同步插入。

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The data acquisition design for the receiver is discussed and the influence of different sampling rates on the significant digit of ADC is analyzed. The IF oversampling technique and PCI-9820 acquisition card are adopted. The dynamic range of the receiver is larger than ( 75 dB.)

在分析接收系统数据采集方案和不同采样速率对数据采集有效位影响的基础上，采用中频过采样技术采集数据，提出选用PCI-9820采集卡的数据采集方案，其动态范围大于75dB。

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If you want to be extra safe, then you should also make a backup copy of your DB.

要是你想成为分外的安全，那末你也应该让您的数值库的备份打补丁副本。

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This standard may be used for the calibrations of limited temperature diode noise source, solid state noise source and gas discharge noise source. The calibration accuracy for these sources is evaluated to be better than ± 0.1 dB.

本标准用于校准限温二极管噪声源、固态噪声源和气体放电管噪声源，校准精确度优于±0.1dB。

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A prototype adaptive moving target indicator ( MTI) system is developed, built upon DSP chips. It has good adaptive cancellation performance for ground clutter and moving clutter. The measured improvement factor is more than 20 dB in a radar system.

并研制了一种用DSP的自适应MTI系统，该系统对杂波环境有较好的自适应能力，对地杂波及运动杂波有较好的抑制效果，在雷达实测中，改善因子大于20dB。

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A DB-1 wide bore capillary column was used with propanol as the internal standard.

采用DB -1 大口径毛细管柱,以正丙醇为内标.

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Result: The upper confidence interval [ 29.9 dB, 40.0 dB ]; the Lower confidence interval [ 12.5 dB, 16.5 dB ].

结果: 上限置信区间为 [ 29.9dB, 40.0dB ], 下限置信区间为 [ 12.5dB, 16.5dB ].

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From simulation results, the third-order inter-modulation distortion ratio ( IMD3) can be reduced by-10 dB on average when a two-tone signal is input. Finally, the bias-controlled predistorter has been used in OFDM system.

从仿真结果可以总结出，当系统采用双音信号作为输入时，功率放大器输出的三阶互调失真可以平均减少10dB。最后，将二极管偏压控制预失真器应用于OFDM系统中。

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Simulations for bit-error-rate on an additive white gaussian noise channel showed that at the threshold of visibility the required E_b/ N_0 was only 3.4 dB, which is 1.8 dB better than the reference schemes.

在加性高斯白噪声信道下的误码率性能仿真证明：在视觉门限下该方案所需的比特信噪比Eb/N0仅为3.4dB，比参考方案有约1.8dB的增益。

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The biochemical results ( AKP, r-GT , TB, DB ) checked postoperatively turned apparently compared with the preoperative results.

术后AKP 、 r-GT 、 TB 、 DB等生化指标较术前明显下降.

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E . moving any additional information that is relevant into the new db.

大肠杆菌 移动任何附加信息到新的数据库相关.

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B & W products have achieved CE 、 UL 、 DB 、 ROSH and other international approvals.

我公司的产品已取得CE、UL、DB、ROSH等国际认证.

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With optimum recording condition, 58 dB CNR was obtained.

在最佳实验条件下，获得了58dB的信噪比。

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The passenger transport diesel locomotive of DB is installed first with take electronic pilot 3516 B engine.

DB的客运内燃机车是首次装用带电子控制的3516B型发动机.

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They wanted DB to retain its turn-up-and-pay style of rail travel, which German passengers cherish.

他们要 DB 保持它的发动就要付钱的铁路旅行方式, 这个是德国旅客所珍爱的.

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DB can be replaced while the furnace is at operating temperature.

当熔炉内温度在操作范围内时DB型 硅碳棒可以被替换.

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The incidences of average threshold shift more than 15 dB were 11.4% ( 5/ 44 cases) and 33.3% ( 8/ 24 cases) in the control group and the cases before 1995, respectively.

平均骨导听力损失大于15dB的发生率分别为33.3%（8/24例）和11.4%（5/44例），差异显著。

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According to the requirements of the E campus's construction, this paper introduces a method to design a Web Database, and presents a new solution for a network examination system based on Browser/ Web Server/ DB Server ( BWD).

从数字化校园建设的需求出发，介绍了Web数据库技术，提出了基于BWD结构的网络考试系统平台的设计方案。

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DB can be mounted in any orientation.

DB型 硅碳棒可以在任何方向是安装.

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Operation FAILED: Amount of sites to be moved exceeds the capacity of target DB.

操作失败: 要移动的网站数量超过了目标DB的容量.

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The optimized transformer of EPX ( EPO) has less several dB in THD than the transformer of EP when they have the same package size.

选择优化后的EPX（EPO）型磁芯制作的变压器比同等封装尺寸下EP型变压器的谐波失真要低几个dB，或在变压器谐波失真未有太大改变的情况下缩小了变压器的封装尺寸；

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Systematic noise testing of an enclosed plant with various modifications based on in-situ experimental work, and tests on cooling air intake and exhaust systems, etc, in an acoustic laboratory, a noise level of 70 dB ( A) was obtained for the plant.

在一个声学实验室内，对经过多种试验性改进的隔声机组上，进行了系统噪声试验和冷却空气吸入和排出系统等的试验，从此机组测得了70dB（A）的噪声值。

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There are common patterns of construction management in the international projects, such as DBB, DB, CM, EPC and PM etc. For different patterns, the rights and liabilities of the partners are also different.

国际上常见的建设工程项目管理模式有DBB、DB、CM、EPC、PM等，在不同的项目管理模式中，建设各方的权利和责任也不一样。

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DB : And some might say that a lion lives a life " fit for a king. "

DB: 有人可能会说狮子过着 “ 国王般的生活 ”.

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Improvements in the cold-end-to-hot-zone resistance ratio between the original DB and new DB has been dramatic.

DB型硅碳棒的冷端部和发热部的电阻比已经发生了巨大的改进.

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DB has a negative resistance temperature characteristic from room temperature to approximately 1200? F ( 650? C ).

DB型 硅碳棒除在室温至1200? F ( 650? C ) 内存在负阻值.

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A DB-624 quartz capillary column and a FID were used.

采用气相色谱法, DB -624石英毛细管柱,氢火焰离子化检测器(FID),程序升温,检测器温度为300℃.

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