Precision rolling methods for groove-section ring based on different contact and feed mode

Controlling the output current characteristic of the pulsed power system is the important approach to optimize the parameters and to heighten the system efficiency in the Electromagnetic Launching System. For enhancing the system performance, distributed-current-feed style is introduced. A distributed current feeding-in model is established and the characteristic and performance is analyzed. Stimulation depicts:1)adopting the distributed feeding style results in more efficient than the central feeding style ;2)employing the new method of distributed-feed-timing-discharging goes a step further to heighten the muzzle velocity. The new model is meaningful to optimize the structure of the electromagnetic launching system, and is effective to the design of the launcher and current-feeding-in system.

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Electrochemical performance analysis of a PEM water electrolysis with cathode feed mode based on flow passage shape of titanium plates

International Journal of Precision Engineering and Manufacturing ◽

10.1007/s12541-016-0130-9 ◽

2016 ◽

Vol 17 (8) ◽

pp. 1073-1078

Author(s):

Alexandre Tugirumubano ◽

Hee-Jae Shin ◽

Sun-Ho Go ◽

Min-Sang Lee ◽

Lee Ku Kwac ◽

...

Keyword(s):

Performance Analysis ◽

Electrochemical Performance ◽

Water Electrolysis ◽

Flow Passage ◽

Feed Mode

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Hydrodynamic modeling of cavitation in a multistage centrifugal pump during its operation in the constant feed mode with a change in the rotor speed of the pump

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/779/1/012047 ◽

2020 ◽

Vol 779 ◽

pp. 012047

Author(s):

M Kasatkin ◽

A Petrov

Keyword(s):

Centrifugal Pump ◽

Hydrodynamic Modeling ◽

Rotor Speed ◽

Multistage Centrifugal Pump ◽

Feed Mode

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Cutter Path Optimization during High-Speed Machining of Numerical Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.341-342.318 ◽

2011 ◽

Vol 341-342 ◽

pp. 318-322

Author(s):

Yong Xiang Gao

Keyword(s):

High Speed ◽

Numerical Control ◽

Process Efficiency ◽

Feed Speed ◽

High Speed Machining ◽

Cutting Depth ◽

Curvature Variation ◽

Cutter Path ◽

Feed Mode ◽

Path Curvature

During the high-speed machining, cutter path of numerical control needs to satisfy the following requirements. There has no colliding among work pieces, fixtures and so on. The cutter path variation cannot too dramatically and the vibration should in the controlled area during the process. Feed speed can modify with path curvature variation and cutting depth need to be equality. This article will analyze and research in the mode of cutter advanced and retreats, cutter movement mode, cutter feed mode and cutter path of corner treatment during the high-speed process programming that could effective optimize cutter path, process efficiency and quality.

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Design of Window Grille Shape-Based Multiband Antenna for Mobile Terminals

International Journal of Antennas and Propagation ◽

10.1155/2021/6684959 ◽

2021 ◽

Vol 2021 ◽

pp. 1-14

Author(s):

Zhen Yu ◽

Yao Li ◽

Ziheng Lin ◽

Xiaoying Ran

Keyword(s):

Microstrip Antenna ◽

Mobile Terminal ◽

Simulation Software ◽

Navigation Systems ◽

Test Results ◽

Effective Current ◽

Current Path ◽

Plate Shape ◽

Feed Mode ◽

Ground Plate

Combined with the classic Chinese window grille structure, this paper proposes and designs a multiband microstrip antenna that can be used in wireless mobile terminal equipment. The antenna radiator adopts a rectangular bending structure with four loops, which increases the effective current path of the antenna radiator in a limited space, so that the overall antenna is miniaturized. The branch structure of the four-ring phase set increases the current path of the antenna, making the antenna multiband. The electromagnetic simulation software HFSS was used for antenna modeling and parameter optimization, and the influence of the feed structure, feed mode, and ground plate shape on the antenna was compared and analyzed. The test results show that the antenna can cover four bands, 0.85–1.1 GHz, 1.2–1.8 GHz, 2.40–2.7 GHz, and 5.05–6.3 GHz, and produce 6 main frequency points, 0.9 GHz, 1.3 GHz, 1.6 GHz, 2.55 GHz, 5.3 GHz, and 6.05 GHz. The antenna can cover various navigation systems, Bluetooth, WLAN, ISM frequency band, and 5G (5.725–5.825 GHz).

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Prediction and Simulation on the Shear Stress and Mass Transfer in Perfused Bioreactors 11: Effect of Feed Mode and Bioreactor Geometry

2008 Chinese Control and Decision Conference ◽

10.1109/ccdc.2008.4598150 ◽

2008 ◽

Author(s):

Kedian Wang ◽

Xia Dong

Keyword(s):

Mass Transfer ◽

Shear Stress ◽

Feed Mode ◽

Prediction And Simulation

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Study on the Preparation of Calcium Sulfate Whisker by Hydrothermal Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.1369 ◽

2012 ◽

Vol 602-604 ◽

pp. 1369-1372 ◽

Cited By ~ 3

Author(s):

Kang Bi Luo ◽

Hu Ping Li ◽

Yan Xia Tan

Keyword(s):

Hydrothermal Method ◽

Calcium Chloride ◽

Sodium Sulfate ◽

Calcium Sulfate ◽

Sulfate Solution ◽

Solution Concentration ◽

Raw Material ◽

Molar Ratio ◽

Feed Mode ◽

Calcium Sulfate Whiskers

This article took the sodium sulfate and calcium chloride as the raw material and prepared calcium sulfate whiskers by hydrothermal method. The experimental results show that the calcium sulfate precursors are prepared by the reverse feed mode in which the sodium sulfate solution drop into the calcium chloride solution under the solution concentration 0.6 mol/L and the molar ratio of Na2SO4 to CaCl2 at 1:1.8. The precursors were placed in pH=6.12 hydrothermal environments and treated in the autoclave at 140 °C for 4 h to obtain the calcium sulfate whiskers having for the ratio of length to diameter at 97.5 and the better morphology.

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