The Corresponding Numerical Analysis of Dike Typical Diseases and Electrolog Data

2011 ◽  
Vol 103 ◽  
pp. 246-251
Author(s):  
Qing Ming Zhang ◽  
Shuai Xu ◽  
Yuan Bao Leng
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Steady State ◽  
Flood Control ◽  
Yellow River ◽  
High Density ◽  
Current Transfer ◽  
Electrical Method ◽  
Steady State Current ◽  
River Flood

Dike is an important component of Yellow River flood control system, but its security situation is not optimistic. High-density electrical method is an effective mean of dike typical diseases detection, we use steady-state current transfer analysis of software ANSYS to establish the numerical simulation model to analyze the detection resolution effects of dike typical diseases depth and scale changes on different detection devices of high-density electrical method, establish the correspondence of dike typical disease and electrolog data.

The Corresponding Theory Study of Dike Typical Diseases and Electrolog Data

2011 ◽  
Vol 103 ◽  
pp. 556-562
Author(s):  
Qing Ming Zhang ◽  
Shuai Xu ◽  
Yuan Bao Leng
Keyword(s):  
Control System ◽  
Theoretical Model ◽  
Flood Control ◽  
Yellow River ◽  
High Density ◽  
Electrical Method ◽  
River Flood

Dike is an important component of Yellow River flood control system, but its security situation is not optimistic. High-density electrical method is an effective mean of dike typical diseases detection, we establish theoretical model to analyze the detection resolution effects of depth and scale changes of dike typical diseases on different detection devices of high-density electrical method, establish the correspondence of dike typical diseases and electrolog data.

scholarly journals Steady-state current transfer and scattering theory

2010 ◽  
Vol 133 (5) ◽  
pp. 054105 ◽  
Author(s):  
Vered Ben-Moshe ◽  
Dhurba Rai ◽  
Spiros S. Skourtis ◽  
Abraham Nitzan
Keyword(s):  
Steady State ◽  
Scattering Theory ◽  
Current Transfer ◽  
Steady State Current

1D and 2D Coupled Numerical Model for Flood Control in Middle Reach of Huaihe River

2013 ◽  
Vol 275-277 ◽  
pp. 2659-2668
Author(s):  
Zhen Kun Ma ◽  
Zi Wu Fan ◽  
Ming Zhang ◽  
Yi Lu Su ◽  
Zhi Ling Sun
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
River Basin ◽  
Flood Control ◽  
Flood Forecast ◽  
Huaihe River Basin ◽  
Middle Reach ◽  
Huaihe River ◽  
Flood Regulation ◽  
The Huaihe River

The core technique of flood forecast and pre-warning of a river basin is the numerical simulation of flood process in a complicated flood control system. According to the structural features, flood features, and flood process mechanism of a large and complicated flood control system, a 1D and 2D coupled numerical simulation model was established. The 1D model was used for the trunk river and main branches, and the 2D model was used for flood districts. The coupled 1D and 2D was used to simulate the flood regulation and process in rivers, lakes, flood districts, and floodways. A case study was conducted in the section from the Wangjiaba to Bengbu floodgates in the middle reach of the Huaihe River. The coupled model was employed to synchronously simulate the branch rivers and trunk flood of the river basin and to improve the accuracy of flood simulation, flood forecast, and regulation of the river basin. The parameters of the model for simulating the flood process of the Huaihe River Basin in 2003 were calculated and verified, and the flood process in 2007 was demonstrated. The simulated results show that the flood regulation and process can be accurately simulated by the proposed numerical model, and the accuracy requirements can be satisfied. Finally, the model was applied to the effect analysis of a four-grade emergency flood control plan in the Huaihe River Basin.

scholarly journals Transient Current Density in a Pair of Long Parallel Conductors

2021 ◽  
Vol 11 (15) ◽  
pp. 6920
Author(s):  
Oldřich Coufal
Keyword(s):  
Steady State ◽  
Cross Section ◽  
Current Density ◽  
Circular Cross Section ◽  
Transient Current ◽  
Constant Current ◽  
Voltage Source ◽  
Sinusoidal Voltage ◽  
Steady State Current ◽  
Maximum Current

Two infinitely long parallel conductors of arbitrary cross section connected to a voltage source form a loop. If the source voltage depends on time, then due to induction there is no constant current density in the loop conductors. It is only recently that a method has been published for accurately calculating current density in a group of long parallel conductors. The method has thus far been applied to the calculation of steady-state current density in a loop connected to a sinusoidal voltage source. In the present article, the method is used for an accurate calculation of transient current using transient current density. The transient current is analysed when connecting and short-circuiting the sources of sinusoidal, constant and sawtooth voltages. For circular cross section conductors, the dependences of maximum current density, maximum current and the time of achieving steady state on the source frequency, the distance of the conductors and their resistivity when connecting the source of sinusoidal voltage are examined.

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