Test system of laser ultrasonic directional transmission channel characteristics

2021 ◽  
Author(s):  
Peipei Zhang ◽  
Yunjing Guan
Keyword(s):  
Test System ◽  
Transmission Channel ◽  
Laser Ultrasonic ◽  
Channel Characteristics ◽  
Directional Transmission

Multistage blind source separations by wavelet analysis

2014 ◽  
Vol 12 (04) ◽  
pp. 1460004 ◽  
Author(s):  
Ryuichi Ashino ◽  
Takeshi Mandai ◽  
Akira Morimoto
Keyword(s):  
Independent Component Analysis ◽  
Blind Source Separation ◽  
Frequency Analysis ◽  
Time Scale ◽  
Sensor Array ◽  
Information Matrix ◽  
Transmission Channel ◽  
Time Frequency ◽  
Channel Characteristics ◽  
Multiwavelet Transform

The purpose of blind source separation is to separate the original sources from the sensor array, without knowing the transmission channel characteristics. Besides methods based on independent component analysis, several methods based on time-frequency analysis have been proposed. In this paper, a new method of multistage separation is proposed, which improves our formerly proposed methods using the time-scale information matrix based on the continuous multiwavelet transform.

A self-adaptive full asynchronous bi-directional transmission channel for network-on-chips

2010 ◽  
Vol 31 (8) ◽  
pp. 085008
Author(s):  
Guan Xuguang ◽  
Yang Yintang ◽  
Zhu Zhangming ◽  
Zhou Duan
Keyword(s):  
Transmission Channel ◽  
Directional Transmission ◽  
Self Adaptive

Immunogold labeling of CMP-KDO synthetase produced by recombinant E. Coli cells

1987 ◽  
Vol 45 ◽  
pp. 924-925
Author(s):  
F. A. Durum ◽  
R. G. Goldman ◽  
T. J. Bolling ◽  
M. F. Miller
Keyword(s):  
Inclusion Bodies ◽  
Large Scale ◽  
Recombinant Dna ◽  
Test System ◽  
Cell Protein ◽  
Gram Negative Bacteria ◽  
Cytoplasmic Inclusions ◽  
Isolation And Purification ◽  
E Coli ◽  
Low Concentrations

CMP-KDO synthetase (CKS) is an enzyme which plays a key role in the synthesis of LPS, an outer membrane component unique to gram negative bacteria. CKS activates KDO to CMP-KDO for incorporation into LPS. The enzyme is normally present in low concentrations (0.02% of total cell protein) which makes it difficult to perform large scale isolation and purification. Recently, the gene for CKS from E. coli was cloned and various recombinant DNA constructs overproducing CKS several thousandfold (unpublished data) were derived. Interestingly, no cytoplasmic inclusions of overproduced CKS were observed by EM (Fig. 1) which is in contrast to other reports of large proteinaceous inclusion bodies in various overproducing recombinant strains. The present immunocytochemical study was undertaken to localize CKS in these cells.Immune labeling conditions were first optimized using a previously described cell-free test system. Briefly, this involves soaking small blocks of polymerized bovine serum albumin in purified CKS antigen and subjecting them to various fixation, embedding and immunochemical conditions.

Real Ear Sound Pressure Levels Developed by Three Portable Stereo System Earphones

1992 ◽  
Vol 1 (4) ◽  
pp. 52-55 ◽  
Author(s):  
Gail L. MacLean ◽  
Andrew Stuart ◽  
Robert Stenstrom
Keyword(s):  
High Frequency ◽  
Sound Pressure ◽  
Low Frequency ◽  
Test System ◽  
Output Frequency ◽  
Frequency Effects ◽  
Adult Men ◽  
Frequency Responses ◽  
Significant Difference ◽  
Sound Pressure Levels

Differences in real ear sound pressure levels (SPLs) with three portable stereo system (PSS) earphones (supraaural [Sony Model MDR-44], semiaural [Sony Model MDR-A15L], and insert [Sony Model MDR-E225]) were investigated. Twelve adult men served as subjects. Frequency response, high frequency average (HFA) output, peak output, peak output frequency, and overall RMS output for each PSS earphone were obtained with a probe tube microphone system (Fonix 6500 Hearing Aid Test System). Results indicated a significant difference in mean RMS outputs with nonsignificant differences in mean HFA outputs, peak outputs, and peak output frequencies among PSS earphones. Differences in mean overall RMS outputs were attributed to differences in low-frequency effects that were observed among the frequency responses of the three PSS earphones. It is suggested that one cannot assume equivalent real ear SPLs, with equivalent inputs, among different styles of PSS earphones.

Pre-clinical evaluation of a virtual reality neuropsychological test system: Occurence of side effects

2000 ◽  
Author(s):  
Tibor I. Kesztyues ◽  
M. Mehlitz ◽  
E. Schilken ◽  
G. Weniger ◽  
S. Wolf ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Side Effects ◽  
Clinical Evaluation ◽  
Neuropsychological Test ◽  
Test System
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