نتایج جستجو برای: structure borne noise
تعداد نتایج: 1769229 فیلتر نتایج به سال:
The oscillatory pressure disturbance created by the refrigerant flow through pipes and components is one of the main sources of noise in household refrigerators. This type of excitation is transferred to the pipes and the vibratory energy travels through the structure reaching the cabinet from which it radiates as sound energy. In order to obtain a better understanding of this type of noise a h...
As a light source for the space gravitational wave detector DECIGO/DPF, we have developed space-borne frequency-stabilized lasers. The light source was an Yb-doped fiber laser with the wavelength of 1030nm. The frequency of the Yb-fiber laser was stabilized in reference to the saturated absorption of iodine molecules so as to suppress the frequency noise down to 1 Hz/rtHz at 1s. We will report ...
in new management approaches, in the organizations with inflexible structure, existing of red tapes and interruptions caused by limitations and also non-compliance with environmental changes, create demotivation among staff. with regard to the influence of job motivational potential and its relationship to the type of organizational structure( enabling and dissuasive), the goal of this research...
One recurring challenge in many areas of modern physics which analyze complex and vast data sets is to use automated methods to distinguish between structure and noise in the data. A particular challenge is to ensure that these methods are based on some well-understood principles, rather than on an ad hoc procedure. In this paper we discuss how a mechanism for automated theory building that nat...
Background: Some pregnant women are exposed to occupational noise, a risk factor for the development of the auditory system. The auditory system is one of the areas in embryonic development in which noise might induce aberrant development. Noise can change the gene expression pattern of an embryo and thereby modify the physiology of the auditory system. Therefore, noise can change the molecular...
Over the last few years, customer demands regarding acoustic performance, along with the tightening of legal regulations on noise emission levels and human exposure to noise, have made the noise and vibration properties into important design criteria for agricultural machinery cabins. In this framework, both experimental analysis procedures for prototype testing as well as reliable numerical pr...
Anthropogenic noise is a widespread and growing form of sensory pollution associated with the expansion of human infrastructure. One specific source of constant and intense noise is that produced by compressors used for the extraction and transportation of natural gas. Terrestrial arthropods play a central role in many ecosystems, and given that numerous species rely upon airborne sounds and su...
China is planning to construct a new space-borne gravitational-wave (GW) observatory, the TianQin project, in which spaceborne telescope an important component laser interferometry. The aimed transmit beams between spacecrafts for measurement of displacements proof-masses long arms. should have ultra-small wavefront deviation minimize noise caused by pointing error, ultra-stable structure optic...
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