The Noise Characteristics Research in Subway Cars

2014 ◽  
Vol 1051 ◽  
pp. 431-434
Author(s):  
Jian Hui Tian ◽  
Lian Jian ◽  
Bing Li
Keyword(s):  
Real Time ◽  
High Frequency ◽  
Noise Spectrum ◽  
Frequency Range ◽  
Noise Characteristics ◽  
Spectrum Distribution ◽  
Spectrum Characteristics ◽  
Relationship Of ◽  
The Relationship

The noise of different points in four sections of Shenzhen subway was tested by this paper. Real-time SPL and noise spectrum distribution curves at bogie were given, while the equivalent SPL curve was also shown. The relationship of subway speed and noise SPL was investigated. The regular of noise spectrum characteristics and SPL was obtained. The results show that the noise SPL increases with the increase of the speed. Looking from the frequency range, the frequency corresponding to larger noise SPL amplitude mainly concentrates in the lower frequency while the subway stopping, the frequency corresponding to larger noise SPL amplitude mainly concentrates in high frequency while the subway running.

High Frequency Response of Beams

1975 ◽  
Vol 42 (4) ◽  
pp. 805-808 ◽  
Author(s):  
R. P. Parker ◽  
V. H. Neubert
Keyword(s):  
Experimental Data ◽  
High Frequency ◽  
Rates Of Convergence ◽  
Series Solutions ◽  
Timoshenko Theory ◽  
High Frequency Response ◽  
Lateral Response ◽  
Mode Solution ◽  
Relationship Of ◽  
The Relationship

In developing the relationship of the normal mode solution for a vibrating rod to the pyrotechnic shock problem, a detailed analysis is presented using the Timoshenko theory to obtain the transient lateral response of a cylindrical rod with free ends to a short duration half sine pulse of either moment or shear applied to one end. Two different series solutions are used and the rates of convergence are compared near the boundary. Results are compared with experimental data.

Reliance on Visual Imagery and its Relation to Mental Rotation

1997 ◽  
Vol 85 (2) ◽  
pp. 431-434 ◽  
Author(s):  
Doris C. Weatherly ◽  
Steven E. Ball ◽  
James R. Stacks
Keyword(s):  
Mental Rotation ◽  
Response Latency ◽  
High Frequency ◽  
Visual Imagery ◽  
Learning Effect ◽  
Low Frequency ◽  
Computer Screen ◽  
The Right ◽  
Relationship Of ◽  
The Relationship

The relationship of habitual use of visual imagery and mental rotation was investigated. Reliance on Visual Imagery scores were used to define subjects as high frequency or low frequency visualizers. During the mental rotation task, subjects indicated if a pair of 2-dimensional stimulus figures displayed on a computer screen were identical or mirror-images. Figures on the right were rotated in relation to those on the left by 0, 60, 120, or 180°. Data supported the prediction that subjects who report high use of imagery would perform the task with greater accuracy ( z=1.97, p<.05) than subjects who reported low use. The imagery groups did not differ in response latency ( z = .91, p<.36). A comparison of performance on Trials 1 to 24 with performance on Trials 115-138 indicated a learning effect in both accuracy ( z = 7.58, p<.01) and latency ( z = 9.72, p<.01) for all subjects.

Study on High Frequency Hydraulic Exciter Based on Rotary Valve Control

2012 ◽  
Vol 490-495 ◽  
pp. 1441-1445 ◽  
Author(s):  
Jian Zhuo Zhang ◽  
Li Zhe Guan ◽  
Kang Kang Li
Keyword(s):  
Mathematical Model ◽  
High Frequency ◽  
Rotary Valve ◽  
Exciting Frequency ◽  
Working Principle ◽  
Relationship Of ◽  
The Mathematical Model ◽  
The Relationship ◽  
Valve Control

A kind of hydraulic exciter based on rotary valve control was studied in this paper, the composition of the exciter and its working principle were introduced, and the mathematical model of the system was established. The characters of the system were simulated using MATLAB. From the results of the simulation, we get the relationship of the amplitude of Vibration oil cylinder between the system’s pressure and the exciting frequency. The results can provide theoretical bases to design the hydraulic exciter.

scholarly journals Design of An Ultra-Thin and Broadband Absorption Materials For Middle-Temperature Applications

2021 ◽  
Author(s):  
Yanmin Jia ◽  
Zhaoning Yang ◽  
Lu Gao ◽  
Wei Ren ◽  
Ruiduan Zhang ◽  
...  
Keyword(s):  
Reflection Loss ◽  
Frequency Selective Surface ◽  
Complex Permeability ◽  
Frequency Range ◽  
Broadband Absorption ◽  
Radar Absorbing Material ◽  
Temperature Environment ◽  
Absorbing Material ◽  
Relationship Of ◽  
The Relationship

Abstract A radar absorbing material (RAM) is designed based on the magnetic ceramic and frequency selective surface (FSS). The phase composition and micromorphology were characterized, respectively. The complex permittivity and complex permeability of magnetic ceramic were tested and studied from 25 ℃ to 500 ℃ temperature. Based on the experimental and simulation results, the changes of reflection loss along with the structure parameters of RAM are analyzed at 500 ℃. The relationship of reflection loss varies with temperature are studied. The analytical results show that the absorption property of the RAM increases with the increase of temperature. An optimal absorption of RAM is obtained at 500℃. When the thickness of RAM is 1.5 mm, the reflection loss lower than -10 dB can be obtained in the frequency range from 8.2 ~ 16 GHz. More than 90% microwave energy can be consumed in the RAM which may be applied in the high temperature environment.

scholarly journals MODERN NEWSPAPER DISCOURSE: DEFENTION OF GENDER AND COMMUNICATION STRATEGIES

2021 ◽  
Vol 5 (3(84)) ◽  
pp. 23-26
Author(s):  
S. Izyumskaya ◽  
L. Chaava
Keyword(s):  
Detailed Analysis ◽  
High Frequency ◽  
Communication Strategies ◽  
Media Presentation ◽  
Newspaper Text ◽  
Communicative Strategy ◽  
Relationship Of ◽  
The Relationship

This article is devoted to one of the most urgent problems– the relationship of the concepts of "gender", "newspaper discourse", "communicative strategy", "media presentation". The focus is on the ways to introduce the concept of "gender" in a modern newspaper text, the consideration of high-frequency strategies and tactics that the authors of the text turn to when including this word. The author convincingly proves that a detailed analysis of the ways of entering the word "gender" helps to better understand the semantics of this concept, to analyze the methods of representation in the space of modern newspaper discourse.

scholarly journals ASSESSMENT OF THE UTILITY OF THE ADVANCED HIMAWARI IMAGER TO DETECT ACTIVE FIRE OVER AUSTRALIA

2016 ◽  
Vol XLI-B8 ◽  
pp. 65-71 ◽  
Author(s):  
B. Hally ◽  
L. Wallace ◽  
K. Reinke ◽  
S. Jones
Keyword(s):  
Real Time ◽  
Land Management ◽  
High Frequency ◽  
Fire Detection ◽  
Japan Meteorological Agency ◽  
Fire Season ◽  
Observation Data ◽  
Detection And Attribution ◽  
Noise Characteristics ◽  
Fire Characteristics

Wildfire detection and attribution is an issue of importance due to the socio-economic impact of fires in Australia. Early detection of fires allows emergency response agencies to make informed decisions in order to minimise loss of life and protect strategic resources in threatened areas. Until recently, the ability of land management authorities to accurately assess fire through satellite observations of Australia was limited to those made by polar orbiting satellites. The launch of the Japan Meteorological Agency (JMA) Himawari-8 satellite, with the 16-band Advanced Himawari Imager (AHI-8) onboard, in October 2014 presents a significant opportunity to improve the timeliness of satellite fire detection across Australia. The near real-time availability of images, at a ten minute frequency, may also provide contextual information (background temperature) leading to improvements in the assessment of fire characteristics. This paper investigates the application of the high frequency observation data supplied by this sensor for fire detection and attribution. As AHI-8 is a new sensor we have performed an analysis of the noise characteristics of the two spectral bands used for fire attribution across various land use types which occur in Australia. Using this information we have adapted existing algorithms, based upon least squares error minimisation and Kalman filtering, which utilise high frequency observations of surface temperature to detect and attribute fire. The fire detection and attribution information provided by these algorithms is then compared to existing satellite based fire products as well as in-situ information provided by land management agencies. These comparisons were made Australia-wide for an entire fire season - including many significant fire events (wildfires and prescribed burns). Preliminary detection results suggest that these methods for fire detection perform comparably to existing fire products and fire incident reporting from relevant fire authorities but with the advantage of being near-real time. Issues remain for detection due to cloud and smoke obscuration, along with validation of the attribution of fire characteristics using these algorithms.

scholarly journals Electronic monitoring and supervision: A comparative perspective

2017 ◽  
Vol 9 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Kristel Beyens
Keyword(s):  
The Netherlands ◽  
Real Time ◽  
Electronic Monitoring ◽  
Comparative Perspective ◽  
Special Issue ◽  
Technological Tool ◽  
Relationship Of ◽  
The Relationship ◽  
Do So

The use of electronic monitoring (EM) has grown rapidly in Europe and elsewhere and is likely to continue to do so. EM is a technological tool that allows to monitor the location of individuals via an electronic ankle tag, to track the movements of individuals either in real time or retrospectively. This special issue of the European Journal of Probation focuses on the relationship of EM with supervision in four jurisdictions (Belgium, Germany, The Netherlands and Scotland) and the question whether EM is mainly used as a stand-alone order or as an integrated measure; that is, alongside other supervisory conditions. It also contains a contribution with an initial round up of Australian experiences with EM.

Self-Actualization as Related to Frequency, Range, and Pattern of Religious Experience

1979 ◽  
Vol 7 (1) ◽  
pp. 39-47 ◽  
Author(s):  
John A. Larsen
Keyword(s):  
Religious Experience ◽  
Personal Data ◽  
Religious Experiences ◽  
Frequency Range ◽  
Validity And Reliability ◽  
Personal Orientation Inventory ◽  
Self Actualization ◽  
Personal Orientation ◽  
Relationship Of ◽  
The Relationship

This study investigated the relationship of frequency, range, and pattern of religious experience to self-actualization. The Religious Experience Measure (REM), a paper and pencil instrument, was constructed to provide measures of Stark's confirming, responsive, ecstatic, and revelational experiences. Validity and reliability studies yielded favorable results. In a classroom setting, the 401 undergraduates who comprised the sample were administered the Personal Data Sheet (PDS), the Personal Orientation Inventory (POI), and the REM. Results showed that high and low self-actualizers alike have religious experiences and that such experiences cannot inherently be viewed as either symptoms of pathology or evidence of positive mental health. However, frequency, range, and pattern are dimensional aspects of religious experience which are differentially related to self-actualization.

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