High Efficiency WLANs IEEE 802.11ax Performance Evaluation

2018 ◽  
Author(s):  
Zineb Machrouh ◽  
Abdellah Najid
Keyword(s):  
Performance Evaluation ◽  
High Efficiency ◽  
Ieee 802.11Ax

Research and Application of Efficient Operation Technology

2014 ◽  
Vol 1030-1032 ◽  
pp. 1760-1763
Author(s):  
Yan Xia Li ◽  
Zheng Long Shao ◽  
Nai Jia Liu ◽  
Yu Peng
Keyword(s):  
Performance Evaluation ◽  
High Efficiency ◽  
Low Cost ◽  
End Users ◽  
Application Performance ◽  
Efficient Operation ◽  
High Satisfaction ◽  
Virtualization Technology ◽  
Efficient Integration

With the development of information, the number of applications is growing. The questions of cost, support, risk and safety also arise. In order to realize low cost and high efficiency, we have studied the efficient operation technologies, including application isolation technology, virtualization technology, performance evaluation technology, etc. Using these technologies, we have realized efficient integration of operation resources, comprehensive optimization of application performance, and high satisfaction of end users.

Survey and Performance Evaluation of the Upcoming Next Generation WLANs Standard - IEEE 802.11ax

2019 ◽  
Vol 24 (5) ◽  
pp. 1461-1474 ◽  
Author(s):  
Qiao Qu ◽  
Bo Li ◽  
Mao Yang ◽  
Zhongjiang Yan ◽  
Annan Yang ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Next Generation ◽  
Ieee 802.11Ax ◽  
And Performance

Development and Evaluation on Surfactant Used in Chemical Flooding

2011 ◽  
Vol 233-235 ◽  
pp. 298-301
Author(s):  
Qi Cheng Liu ◽  
Yong Jian Liu
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Performance Evaluation ◽  
High Efficiency ◽  
Carbon Number ◽  
Cost Effective ◽  
Structure Characterization ◽  
Chemical Flooding ◽  
Oil Water ◽  
And Performance ◽  
Main Component

Oil component and molecule structures is studied by application of gas chromatogram, infrared spectrum and nuclear magnetic resonance to develop high efficiency and cost effective surfactant used for chemical flooding, HZS surfactant has been developed on basis of relationship between effectiveness and structure of the surfactant. Study on surfactant structure characterization and performance evaluation suggests that oil/water interfacial tension is super low when distribution of carbon number of main component of surfactant is identical to the distribution of main component of oil, and concentration impairment due to surfactant retention on surface of core. Reference can be provided to reservoir selection and surfactant development of other oilfield.

scholarly journals Efficiency analysis of hydrodynamic calculations on GPU and CPU clusters

2016 ◽  
pp. 329-338
Author(s):  
А.В. Сентябов ◽  
А.А. Гаврилов ◽  
М.А. Кривов ◽  
А.А. Дектерев ◽  
М.Н. Притула
Keyword(s):  
Performance Evaluation ◽  
High Efficiency ◽  
Control Volume ◽  
Flow Simulation ◽  
Efficiency Analysis ◽  
Control Volume Method ◽  
Hexahedral Meshes ◽  
Hydrodynamic Calculations ◽  
Volume Method ◽  
New Generation

Рассматривается ускорение параллельных гидродинамических расчетов на кластерах с CPU- и GPU-узлами. Для тестирования используется собственный CFD-код SigmaFlow, портированный для расчетов на графических ускорителях с помощью технологии CUDA. Алгоритм моделирования течения несжимаемой жидкости основан на SIMPLE-подобной процедуре и дискретизации с помощью метода контрольного объема на неструктурированных сетках из тексаэдральных ячеек. Сравнение скорости расчета показывает высокую производительность графических ускорителей нового поколения в GPGPU-расчетах. Speedup of parallel hydrodynamic calculations on clusters with CPUs and GPUs is considered. The CFD SigmaFlow code developed by the authors and ported for GPU by means of CUDA is used in test calculations. The incompressible flow simulation is based on a SIMPLE-like procedure and on a discretization by the control volume method on unstructured hexahedral meshes. The performance evaluation shows a high efficiency of the new generation of GPUs for GPGPU calculations.

scholarly journals Development of a Device to Pulping Fruits of Bocaiuva (Acrocomia aculeate sp.): Intended for the Communities that Practice Sustainable Agriculture or Strativism

2019 ◽  
Vol 11 (2) ◽  
pp. 397
Author(s):  
Carlos Alberto Machado Chuba ◽  
Ramon Eduardo Pereira Silva ◽  
Andrea Cristina dos Santos ◽  
Eliana Janet Sanjinez-Argandoña
Keyword(s):  
Performance Evaluation ◽  
Rural Communities ◽  
Sustainable Agriculture ◽  
Production Rate ◽  
High Efficiency ◽  
Fruit Pulp ◽  
Production Chain ◽  
Biofuel Industry ◽  
Intermittent Operation ◽  
Experimental Bench

Bocaiuva (Acrocomia aculeata) fruit pulp has high potential for food, pharmaceutical and cosmetic applications and in the biofuel industry, however, the main hindrance for these applications is the availability of pulp in sufficient quantity. The pulp of this fruit is usually supplied by rural communities where the processors use manual pulping, which is not only time-consuming but yields product of low quality. Therefore, the objective of this work was to design, fabricate and evaluate the efficiency of an experimental bench device for pulping bocaiuva fruits. The bench device was designed to be compact and easy to operate, consisting of three units (processing, secondary, and peripheral) with intermittent operation and pulping performed by shearing. The performance evaluation of the machine was carried out with fruit dehydrated at 70 ºC and different times of dehydration (6, 12 and 24 hours). The pulp weight was evaluated every 15 seconds during the pulping process period (150 seconds). The highest pulping efficiency (96%) was obtained with fruits that were dehydrated for 24 hours, with a 120-second pulping, which resulted in a production rate of 5.5 kg h-1 This high efficiency makes this mechanized prototype effective for pulping bocaiuva fruits and, thus, it can replace manual pulping, especially in rural communities involved with the bocaiuva production chain.

scholarly journals Fabrication and Performance Evaluation of Cowpea Thresher for Small Scale Cowpea Farm Holders in Nigeria

2018 ◽  
pp. 1-11
Author(s):  
O. W. Muhammed-Bashir ◽  
K. O. Oriola ◽  
B. A. Ogundeji ◽  
M. A. Adesokan
Keyword(s):  
Performance Evaluation ◽  
Study Design ◽  
High Efficiency ◽  
Throughput Capacity ◽  
Small Scale ◽  
Maximum Throughput ◽  
Sieve Size ◽  
Dimension Analysis ◽  
The Mean ◽  
And Performance

Aims: To develop and evaluate an affordable, accessible, easy-to-operate and functional small-scale thresher machine to make cowpea farming a profitable venture. Study Design: Fabrication and performance evaluation. Place and Duration of Study: Premises of DAF Technical Services, Ilorin, Nigeria, between June, 2017 and February, 2018. Methodology: Construction of a cowpea thresher machine was carried out by sizing and marking out the plate with the aid of scriber and cutter. The shaft was smoothened and the various components were welded and assembled with the aid of fasteners. The thresher was made-up of the feeding unit, which provided an opening through which the cowpea was introduced into the machine for threshing. As the various components of the cowpea thresher (threshing drum, the lower concave (screen), the spikes and separating unit) were being assembled, dimension analysis was carried out on two varieties of cowpea grains. This was meant to determine the screen sieve size. Results: Findings from this study indicated the mean cowpea grain threshing efficiencies of 71.40, 66.10, and 63.10% at a different speed of 472, 339, and 283 rpm respectively. The maximum throughput capacity (59.78 kg/hr) was obtained at threshing speed of 472 rpm. This revealed that as the speed decreased the threshing efficiency, the throughput capacity and grain loss also decreased, while damaged grains are negligible. Conclusion: The fabricated cowpea thresher is therefore, a suitable machine with high efficiency to carry out necessary small scale post-harvest operations in cowpea production.

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