A Highly Effective Multiplexing Strategy of VBR Real-Time Stream in Multiple Channels

2011 ◽  
Vol 58-60 ◽  
pp. 233-237 ◽  
Author(s):  
Jian Chen ◽  
Kai Xiong Su ◽  
Xiu Zhi Yang ◽  
Rong Hua Lin
Keyword(s):  
Real Time ◽  
Multiple Channels ◽  
Channel Utilization ◽  
Theoretical Derivation ◽  
Highly Effective

In the demand of compounding transmission with SD and HD programs, based on analyzing two kind of multiplexing models’ characteristic with monopolizing buffer and sharing buffer, it proposes a kind of highly effective multiplexing strategy for multi-channel MPEG-2/AVS real-time stream. As is indicated by theoretical derivation and simulated result, this strategy can multiplex the greatest data quantity, without transmitting loss and with the least resource, thus is more advantageous in raising channel utilization.

Online Real-Time Monitoring System Through Using Adaptive Angular-Velocity VKF Order Tracking

2012 ◽  
Author(s):  
Ting-Chi Yeh ◽  
Min-Chun Pan
Keyword(s):  
Angular Velocity ◽  
Real Time ◽  
Monitoring System ◽  
Condition Monitoring ◽  
Theoretical Derivation ◽  
Periodic Loading ◽  
Order Tracking ◽  
Computation Scheme ◽  
Condition Monitoring System ◽  
Operation Status

When rotary machines are running, acousto-mechanical signals acquired from the machines are able to reveal their operation status and machine conditions. Mechanical systems under periodic loading due to rotary operation usually respond in measurements with a superposition of sinusoids whose frequencies are integer (or fractional integer) multiples of the reference shaft speed. In this study we built an online real-time machine condition monitoring system based on the adaptive angular-velocity Vold-Kalman filtering order tracking (AV2KF_OT) algorithm, which was implemented through a DSP chip module and a user interface coded by the LabVIEW®. This paper briefly introduces the theoretical derivation and numerical implementation of computation scheme. Experimental works justify the effectiveness of applying the developed online real-time condition monitoring system. They are the detection of startup on the fluid-induced instability, whirl, performed by using a journal-bearing rotor test rig.

Ureterolitholapaxy: Our experience

1997 ◽  
Vol 64 (1) ◽  
pp. 46-49
Author(s):  
F. Cauda ◽  
A. De Natale ◽  
F. Alladio ◽  
C. Ferraris ◽  
U. Ferrando
Keyword(s):  
Real Time ◽  
Renal Colic ◽  
Ureteral Stones ◽  
Ureteral Lithiasis ◽  
Highly Effective ◽  
Endoscopic Lithotripsy ◽  
Push Up

The authors report on their experience of treating ureteral stones in 1183 patients with ballistic and electrohydraulic endoscopic lithotripsy. Since the outcome was successful in 95% of cases with few complications (2%), this method is considered highly effective for treating stones in any part of the ureter, with the possibility of resolving renal colic in real-time. In the push-up cases (25% for sub-junctional ureteral lithiasis, 10% other sites) a second treatment was performed with ESWL after positioning a double J catheter.

scholarly journals A Call Admission Control Scheme for Multimedia Support Over IEEE 802.11 Wireless LANs

2012 ◽  
pp. 75-81
Author(s):  
Kauthale S. M.
Keyword(s):  
Real Time ◽  
Ieee 802.11 ◽  
Mac Protocol ◽  
Wireless Lans ◽  
Distributed Coordination ◽  
Channel Utilization ◽  
Time Data ◽  
Optimal Point ◽  
Available Bandwidth ◽  
Call Admission

These days there is an increasing interest for VoIP over wireless LANs. QoS support for real-time services like voice in the IEEE 802.11 WLAN is an important issue. Since IEEE 802.11 uses contention based MAC protocol – the distributed coordination function DCF, it is difficult to support the strict QoS requirements for voice in these networks. In this thesis a call admission scheme called “CAC” is proposed to achieve this goal, without changing the basic channel access mechanism of IEEE 802.11. CAC scheme regulates the arriving traffic in the wireless network to efficiently coordinate the medium among the contending traffic sources so that the network operates at optimal point, supporting the QoS requirements as well as providing better channel utilization. In this proposal, majority of available bandwidth is allocated to voice sources and remaining small amount is allocated for non real-time data traffic. It is expected that the proposed CAC scheme can well support strict QoS requirements, such as high throughput and low delay at the same time achieve a high channel utilization.

A Research of Highly Effective Statistical Multiplexing Strategy

2011 ◽  
Vol 145 ◽  
pp. 505-509
Author(s):  
Jian Chen ◽  
Kai Xiong Su ◽  
Xiu Zhi Yang
Keyword(s):  
Theoretical Analysis ◽  
Real Time ◽  
Data Storage ◽  
Traditional Scheduling ◽  
Statistical Multiplexing ◽  
Weight Factor ◽  
Channel Utilization ◽  
Simulation Test ◽  
Stream Media ◽  
Weight Value

This article combines traditional scheduling algorithms' characteristic with newly multiplexing method for stream media, integrates two kinds of multiplexing models with monopolizing buffer and sharing buffer, and an efficient statistical multiplexing strategy is proposed that is suitable for VBR real-time stream. This multiplexing strategy creates different weight formulas for two buffer levels respectively: in the first level non-loss multiplexing is carried on, and weight factor is calculated by data storage and arrival order from each channel, so who has the largest weight value will be dispatched at top priority; the second level is compatible non-loss with loss multiplexing, and weight equation is established by the importance as well as overflow of data, finally who has the smallest weight value will be dropped firstly. Through theoretical analysis and simulation test, it indicates that this kind of statistical multiplexing strategy which uses least buffer and does less harm to data can carry the maximum transport rate, thus is more advantageous in raising channel utilization.

scholarly journals REMOTE ATTITUDE SENSING BASED ON HIGH-SPEED MUELLER MATRIX ELLIPSOMETRY

2020 ◽  
Vol XLIII-B1-2020 ◽  
pp. 607-614
Author(s):  
S. Zhang ◽  
H. Jiang ◽  
H. Gu ◽  
X. Chen ◽  
S. Liu
Keyword(s):  
Real Time ◽  
High Speed ◽  
Angular Resolution ◽  
Mueller Matrix ◽  
Moving Object ◽  
High Angular Resolution ◽  
High Temporal Resolution ◽  
Theoretical Derivation ◽  
The Real ◽  
Attitude Tracking

Abstract. The attitude metrology of moving objects has always been a hot topic in engineering applications. In this article, a novel optical method based on the high-speed Mueller matrix ellipsometry (MME) is proposed for real-time remote attitude sensing. With the help of an electric level, all the attitude angles of a free-moving object with a birefringent waveplate attached can be simultaneously extracted in real time. Compared with existing ellipsometry-based attitude metrology that can only be used in the transmission mode, the proposed method with the advantages of the high-speed MME can expand the application to both the transmission and reflection modes while maintaining higher accuracy and robustness in an ultra-large measurement range. The basic principle is presented via theoretical derivation, and the change in the Mueller matrix of the birefringent waveplate versus the attitude angles is explored in the simulated experiments. In a series of the dynamic experiments, with the extremely high temporal resolution and accuracy of the high-speed MME, an angular resolution up to 0.00022° and an angular accuracy better than 0.01° are achieved in the real-time attitude tracking of the free-moving object. As an additional benefit, the real-time angular velocity and acceleration of all the attitude angles can be obtained simultaneously. These experimental results demonstrate that the proposed attitude metrology is ready to be applied to the real-time remote attitude sensing with high angular resolution and accuracy.

Efficient channel utilization for real-time video in OVSF-CDMA systems with QoS assurance

2006 ◽  
Vol 5 (6) ◽  
pp. 1382-1391 ◽  
Author(s):  
Jun Xu ◽  
Xeumin Shen ◽  
J.W. Mark ◽  
Jun Cai
Keyword(s):  
Real Time ◽  
Channel Utilization ◽  
Cdma Systems

On-Body Chemo/Bio-Sensing - Opportunities and Challenges

2014 ◽  
Vol 96 ◽  
pp. 78-88
Author(s):  
Giusy Matzeu ◽  
Cormac Fay ◽  
Conor O’Quigley ◽  
Dylan Orpen ◽  
Simon Coleman ◽  
...  
Keyword(s):  
Heart Rate ◽  
Real Time ◽  
Chemical Sensors ◽  
Chemical Sensing ◽  
Body Measurements ◽  
Accurate Data ◽  
Significant Progress ◽  
Sensing Element ◽  
Highly Effective

In recent years, there has been significant progress in a number of sensing technologies related to on-body measurements, such as platforms for monitoring respiration, heart rate, location and movement. In these cases, the sensing element (s) are based on highly effective transducers that are increasingly integrated into garments such that they are becoming innocuous to the user. In contrast, the area of on-body chemical sensing remains highly under-developed. In this paper, we will address the significant challenges that are inhibiting the practical realisation of reliable chemical sensors and biosensors capable of generating accurate data in real time.

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