Accurate Network Flow Measurement with Deterministic Admission Policy

2020 ◽  
pp. 68-81
Author(s):  
Hongchao Du ◽  
Rui Wang ◽  
Zhaoyan Shen ◽  
Zhiping Jia
Keyword(s):  
Network Flow ◽  
Flow Measurement ◽  
Admission Policy

scholarly journals Whole-region Tourism Greenway Network Organization Mechanism Based on Gravity Model Flow Measurement

2019 ◽  
Author(s):  
Xue Jiang ◽  
◽  
Tianyu Zhao ◽  
◽  
◽  
...  
Keyword(s):  
Gravity Model ◽  
Network Structure ◽  
Network Flow ◽  
Flow Measurement ◽  
Field Research ◽  
Minimum Cost ◽  
Small Towns ◽  
Ecological Resources ◽  
Model Flow ◽  
Structure Evaluation

The structure and organization of greenway network is the core stone of greenway planning. Generally, the relevant between point elements and line elements in the network is taken as the focus of quantitative structure evaluation. In this study, the evaluation and organization method of greenway network is based on gravity model flow measurement. Ningan city is taken as an example because of its rich tourism resources and ecological resources. The cost distance formula has been improved in the process. Network flow is allocated to each path in the gravitational model to enhance the scientific evaluation. Firstly, the existing greenway network structure is sorted out and summarized. Minimum cost path method is used to form potential greenway network structure. This structure is divided into two parts, one is based on comprehensive elements and the other is based on general elements. The existing structure and potential structure are combined to form a preliminary abstract network structure. Gravity model is used to measure and classify the traffic among abstract network nodes. Two kinds of greenway network structures are compared and analyzed. On this basis, the greenway network is optimized and verified through field research. It provides a basis for the further planning and implementation of the actual greenway network in small towns

Speed Records in Network Flow Measurement on FPGA

2021 ◽  
Author(s):  
Arish Sateesan ◽  
Jo Vliegen ◽  
Simon Scherrer ◽  
Hsu-Chun Hsiao ◽  
Adrian Perrig ◽  
...  
Keyword(s):  
Network Flow ◽  
Flow Measurement

scholarly journals Cost Effective Network Flow Measurement for Software Defined Networks: A Distributed Controller Scenario

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 5182-5198 ◽  
Author(s):  
Hamid Tahaei ◽  
Rosli Bin Salleh ◽  
Mohd Faizal Ab Razak ◽  
Kwangman Ko ◽  
Nor Badrul Anuar
Keyword(s):  
Network Flow ◽  
Flow Measurement ◽  
Cost Effective ◽  
Software Defined Networks ◽  
Distributed Controller ◽  
Effective Network

Power generation scheduling through use of generalised network flow programming

1991 ◽  
Vol 138 (1) ◽  
pp. 39 ◽  
Author(s):  
R.E. Rice ◽  
W.M. Grady ◽  
W.G. Lesso ◽  
A.H. Noyola ◽  
M.E. Connolly
Keyword(s):  
Power Generation ◽  
Network Flow ◽  
Generation Scheduling ◽  
Network Flow Programming

Blast furnace tapping flow measurement

1991 ◽  
Vol 88 (9) ◽  
pp. 905-911
Author(s):  
C.A.A. Jonker ◽  
J. Vermeij
Keyword(s):  
Blast Furnace ◽  
Flow Measurement

Structured methods for improving flow measurement accuracy in pipelines

2020 ◽  
pp. 30-35
Author(s):  
Gurami N. Akhobadze
Keyword(s):  
Flow Measurement ◽  
Measurement Accuracy ◽  
Directional Coupler ◽  
Signal To Noise Ratio ◽  
Scattered Wave ◽  
Orthogonal Polarization ◽  
Flow Sensors ◽  
Information Signal ◽  
Mass Flows ◽  
Processing Device

In the age of digital transformation of production processes in industry and science the development and design of intelligent flow sensors for granular and liquid substances transferring through pipelines becomes more important. With this in view new approaches for improving the accuracy of microwave flowmeters are proposed. Taking into account the characteristics ofelectromagnetic waves propagating through a pipeline, a wave scattered by inhomogeneities of the controlled medium is analyzed. Features of the transformation of the polarized scattered wave limiting the geometric dimensions of the pipeline and optimizing the values of the useful scattered signal are revealed. Expediency of collection of the information signal with orthogonal polarization of the scattered wave and through a directional coupler is substantiated. The method of estimating the measurement accuracy with reference to the signal-to-noise ratio at the input of the processing device is given. The research results can be used in cryogenic machine engineering to measure volume and mass flows of liquid cryogenic products.

Investigation of the influence of the flow structure on the accuracy of flow measurement before a hydrometric structure in an open channel

2020 ◽  
pp. 41-44
Author(s):  
Anatoly Kusher
Keyword(s):  
Velocity Profile ◽  
Flow Velocity ◽  
Water Flow ◽  
Flow Measurement ◽  
Water Discharge ◽  
Critical Depth ◽  
Flow Measurements ◽  
Study Results ◽  
Flow Velocity Profile ◽  
Upstream Flow

The reliability of water flow measurement in irrigational canals depends on the measurement method and design features of the flow-measuring structure and the upstream flow velocity profile. The flow velocity profile is a function of the channel geometry and wall roughness. The article presents the study results of the influence of the upstream flow velocity profile on the discharge measurement accuracy. For this, the physical and numerical modeling of two structures was carried out: a critical depth flume and a hydrometric overfall in a rectangular channel. According to the data of numerical simulation of the critical depth flume with a uniform and parabolic (1/7) velocity profile in the upstream channel, the values of water discharge differ very little from the experimental values in the laboratory model with a similar geometry (δ < 2 %). In contrast to the critical depth flume, a change in the velocity profile only due to an increase in the height of the bottom roughness by 3 mm causes a decrease of the overfall discharge coefficient by 4…5 %. According to the results of the numerical and physical modeling, it was found that an increase of backwater by hydrometric structure reduces the influence of the upstream flow velocity profile and increases the reliability of water flow measurements.

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