This paper provides and proves the existence theorem of analytical solution about two order nonlinear Bernoullis equation by using combinatorial technique of dominant series.
运用强级数组合技巧给出并证明了二阶非线性Ｂｅｒｎｏｕｌｉ方程解析解的存在定
Through the spot measurement of the pump and downstream pipeline noise,and analyzing the spectrum analysis curve of sound pressure level and sound intensity level,this paper offers basis for the fundamental reason study of high vibration and noise,and puts forward t.
通过对泵及下游管线噪声进行现场测量,以及对各测点声压级谱分析曲线和声强级谱分析曲线的分析,为研究其振动和噪声高的根本原因、提出合适的改造方案提供依据。
There are also instruments known as noise meters which measure this level directly.
还有一些可以直接测出声强级的仪器，叫做噪声计。
Acoustics--Determination of sound power levels of noise sources using sound intensity--Part 2: Measurement by scanning
GB/T16404.2-1999声学声强法测定噪声源的声功率级第2部分：扫描测量
Acoustics--Determination of sound power levels of noise sources using sound intensity--Part 1: Measurement at discrete points
GB/T16404-1996声学声强法测定噪声源的声功率级第1部分:离散点上的测量
Cranks up the sound on the stereo.
使立体声的声音增强
According to range image noise, combining intensity image with multilevel median filtering is used for actual ladar image.
根据距离像噪声来源,采用结合强度像的多级中值滤波对实际的雷达图像进行了去噪处理。
There was no vulgar bullying, no bravado of any sort, no choleric hectoring…
没有低级庸俗的恃强欺弱，没有任何形式的虚张声势，没有怒气冲冲的威胁恐吓…
"Noise" cannot be measured in the same way because it refers to the psychological effect of sound and its level of "intensity" depends on the situation.
这是因为噪音所指的是声音的心理效果，其强度级别依照具体情况而定。
A. Athletic Fish-Eye Seat Base is the upgrade of enhanced rubber seat with superficial flinty processing, non-loudness.
竞技鱼眼上座，是在强化橡胶上座的再一次升级，表面硬质加工处理，不易产生声响。
To raise in condition, rank, or esteem.
提高地位，级别，声望
measured noise level [MNL]
量度所得的噪音声级
passive advanced sonobuoy
被动式高级声呐浮标
Integrating-averaging sound level meters
GB/T17181-1997积分平均声级计
A-weighted equivalent continuous sound pressure leve
Ａ加权等效连续声压级
Conclusion The workplace can be classified by equivalent consecutive sound level A.
结论噪声作业可以用等效连续A声级来进行分级。
Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using a reference sound source
GB/T16538-1996声学声压法测定噪声源声功率级使用标准声源简易法
Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic and semi-anechoic rooms
GB/T6882-1986声学噪声源声功率级的测定消声室和半消声室精密法
Measurement of sound pressure level for sound signal appliances by seagoing vessel
GB/T12303-1990海船声号器具的声压级测量
" Electric,sonic properties and measuring methods for sound level meters"
GB/T3785-1983声级计的电、声性能及测试方法
