The Electro-Osmotic Device for Extensive Soil Dehydration

2012 ◽  
Vol 170-173 ◽  
pp. 937-940
Author(s):  
Tai Bin Cao
Keyword(s):  
High Frequency ◽  
Flow Measurement ◽  
High Water ◽  
Power Source ◽  
Single Chip ◽  
Osmotic Effect ◽  
The Core ◽  
Switch Mode ◽  
Special Power ◽  
Source Electrode

In order to improve the electro-osmotic effect in high water ratio soil dehydration consolidation, this paper introduced an electro-osmotic installation system for extensive soil draining which were composed by special power source, electrode, vacuum pump and flow measurement device etc. Among those above, the development of special power source was the core of the system, which was mainly introduced in this paper with power electrical technology and single chip SCM technology and constitutive digital high frequency switch mode power source. The system supported a plenty of technological operations. It was available in worksite.

Study on Corrosion of X80 Pipeline Steel in Different Water Content of Soil

2014 ◽  
Vol 1015 ◽  
pp. 655-658
Author(s):  
Shu Zhen Yu ◽  
Guang Jun Xu ◽  
Han Hua Song ◽  
Xun Zhu ◽  
Wen We Lu ◽  
...  
Keyword(s):  
Water Content ◽  
High Frequency ◽  
Pipeline Steel ◽  
Electrochemical Corrosion ◽  
High Water ◽  
High Water Content ◽  
Linear Segment ◽  
X80 Pipeline Steel ◽  
The Third ◽  
In The Beginning

The electrochemical corrosion of X80 pipeline steel in Xinzhou’s soil with different water content is tested and analyzed. The corrosion signal time and frequency domain figure show that the corrosion signal fluctuates all the time in 30 days’ test with low water content (14%). The slope of high-frequency linear segment in the potential PSD is smaller than it is at the beginning. In the soil with the middle water content (18%), the intense wave motion lasts for 15 days. The noise fluctuation only exists before the third days when in the high water content soil (22%). After the third day, linear drift can be observed but no transient peak. The slope of high-frequency linear segment changes obviously compared with the situation in the beginning. And the high-frequency white noise appears.

Relative clauses in Agul from a corpus-based perspective

2020 ◽  
Vol 73 (1) ◽  
pp. 113-158
Author(s):  
Timur Maisak
Keyword(s):  
High Frequency ◽  
Relative Clauses ◽  
High Ratio ◽  
The Other ◽  
The Core ◽  
Text Corpora ◽  
The Asymmetry ◽  
Intransitive Verbs ◽  
Syntactic Restrictions ◽  
Locative Case

AbstractThis paper gives an account of participial clauses in Agul (Lezgic, Nakh-Daghestanian), based on a sample of 858 headed noun-modifying clauses taken from two text corpora, one spoken and one written. Noun-modifying clauses in Agul do not show syntactic restrictions on what can be relativized, and hence they instantiate the type known as GNMCCs, or general noun-modifying clause constructions. As the text counts show, intransitive verbs are more frequent than transitives and experiencer verbs in participial clauses, and among intransitive verbs, locative statives with the roots ‘be’ and ‘stay, remain’ account for half of all the uses. The asymmetry between the different relativization targets is also significant. Among the core arguments, the intransitive subject (S) is the most frequent target, patient (P) occupies second place, and agent (A) is comparatively rare. The preference of S and, in general, of S and P over A also holds true for most other Nakh-Daghestanian languages for which comparable counts are available. At the same time, Agul stands apart from the other languages by its high ratio of non-core relativization which accounts for 42% of all participial clauses. Addressee, arguments and adjuncts encoded with a locative case, as well as more general place and time relativizations show especially high frequency, outnumbering such arguments as experiencers, recipients, and predicative and adnominal possessors. Possible reasons for the high ratio of non-argument relativization are discussed in the paper.

A Novel Full-Automatic Garbage Salvage Ship

2013 ◽  
Vol 791-793 ◽  
pp. 1921-1924
Author(s):  
Ke Ling Luo ◽  
Xu Dong Li ◽  
De Rui Song ◽  
Ping Wang ◽  
Jiao Fu ◽  
...  
Keyword(s):  
Control System ◽  
Obstacle Avoidance ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Power Circuit ◽  
The Core ◽  
Photoelectric Sensor

The garbage salvage ship is made from polystyrene plastic as hull framework and STC89C52 single-chip microcomputer to control the core, and consists of DC gear motor, photoelectric sensor, power circuit and other circuits. The system uses STC89C52 to control the boat to move forward, backward or turn through the I/O port. Tracing is finished by infrared obstacle avoidance sensor E18-D80NK. Working manner of the infrared obstacle avoidance sensor E18-D80NK was introduced and its application scheme based on STC89C52 single-chip microcomputer in the control system of garbage salvage ship was put forward.

scholarly journals Basic Power Inductor Design

2021 ◽  
Author(s):  
Charles R. Sullivan
Keyword(s):  
Design Process ◽  
High Frequency ◽  
Basic Design ◽  
The Core ◽  
Basic Procedure ◽  
Winding Loss ◽  
Saturation Constraint ◽  
Basic Power ◽  
Power Inductor

<p>A basic procedure for designing a power inductor is presented. Many papers and textbook chapters offer more sophisticated methods, but it is harder to find a clear outline of a basic design process. Studying and practicing a basic design process is useful for beginners to understand the fundamental tradeoffs in design and to build intuition. For more advanced work, the basic design process is useful as it avoids relying on assumptions that might not be valid with, for example, high-frequency loss effects that are ignored in the development of some more sophisticated methods, or that constrain other methods to narrow, specific cases.</p> <p>Two options are outlined: starting with a saturation constraint, and then checking the core/winding loss balance; or, starting by optimizing the core/winding loss balance, and then checking the saturation constraint.</p>

scholarly journals MINKOWSKI LOOP ANTENNA FOR 5G MOBILE COMMUNICATION

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Debasish Dash ◽  
Mrunal A Marihal ◽  
Dr. H. V. Kumaraswamy ◽  
Dr K. Sreelakshmi
Keyword(s):  
High Frequency ◽  
System Capacity ◽  
Regular Pattern ◽  
Fractal Structures ◽  
High Frequency Structure Simulator ◽  
The Core ◽  
Fifth Generation ◽  
High System ◽  
4G Lte ◽  
Cellular Technology

5G or fifth generation of cellular technology, is the successor of 4G LTE. It focusses on high date rate, high system capacity cheaper cost. Although it is still a maturing technology, the countries around the world have already stared implementing of on experimented basis. Massive connectivity is at the core of 5G and thus aim to get different components around us connected to each other. The paper focusses on minkowski loops fractal structures till 2nd iteration making a simpler and cheaper antenna for 5G application of cellular technology. The main feature of this antenna is that it occupied the same space as a regular pattern antenna, but offers a far bigger length for radiation. The resonant frequency taken is 30GHz. The substrate taken is RT-Duriod 6006 with dielectric constant 6.45. The antenna has been designed, simulated and analyzed using the software high frequency structure simulator.

Portable Pressure Test System for Brake of Rail Transit

2014 ◽  
Vol 530-531 ◽  
pp. 245-248
Author(s):  
Sen Jie Cui ◽  
Chang Qi Yang
Keyword(s):  
Pressure Sensors ◽  
Power Source ◽  
Test System ◽  
Rail Transit ◽  
Signal Acquisition ◽  
Single Chip ◽  
Pressure Signal ◽  
Whole Process ◽  
Pressure Test ◽  
Acquisition Device

This paper designs a pressure signal acquisition device for brake of rail transit, and establish a framework for the pressure signal test system based on the Single Chip Micyoco (SCM for short) C8051F350. It gives a brief introduction of the whole process for the test system, and emphatically analysis the part of the pressure sensors, the power source, the display and the communication. Lastly, we adjust the factor of the whole test system and assemble the system to test the pressure portably.

Design and Analysis of a Photovoltaic Power System with Bi-Directional Inverter

2013 ◽  
Vol 291-294 ◽  
pp. 9-13
Author(s):  
De Han Luo ◽  
Yu En Wu ◽  
Qiang Li
Keyword(s):  
Power System ◽  
High Frequency ◽  
Current Control ◽  
High Current ◽  
Single Chip ◽  
Current Harmonic ◽  
Grid Connection ◽  
Photovoltaic Power ◽  
Buffer Power ◽  
Analysis Design

This paper presents the analysis, design, and simulation of a photovoltaic power system with bi-directional inverter, which can be controlled with a single-chip microcontroller, such as dsPIC30F4011. The bi-directional inverter can fulfill grid connection and rectification with power factor correction to regulate the dc bus to a certain range of voltages. So, it will no need energy storage elements to buffer power. But the two stage series can cause high current harmonic, so a predictive current control and modulation principle for the bi-directional inverter is designed and operated in high frequency to reduce the current harmonic. Simulation and experimental results have illustrated the discussed features and significantly demonstrated its feasibility, reliability, and stability.

scholarly journals Magnetic Resonance Imaging of Methane Hydrate Formation and Dissociation in Sandstone with Dual Water Saturation

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3231
Author(s):  
Stian Almenningen ◽  
Per Fotland ◽  
Geir Ersland
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Methane Hydrate ◽  
Water Saturation ◽  
High Water ◽  
Growth Patterns ◽  
Resonance Imaging ◽  
Initial Water ◽  
Hydrate Dissociation ◽  
The Core

This paper reports formation and dissociation patterns of methane hydrate in sandstone. Magnetic resonance imaging spatially resolved hydrate growth patterns and liberation of water during dissociation. A stacked core set-up using Bentheim sandstone with dual water saturation was designed to investigate the effect of initial water saturation on hydrate phase transitions. The growth of methane hydrate (P = 8.3 MPa, T = 1–3 °C) was more prominent in high water saturation regions and resulted in a heterogeneous hydrate saturation controlled by the initial water distribution. The change in transverse relaxation time constant, T2, was spatially mapped during growth and showed different response depending on the initial water saturation. T2 decreased significantly during growth in high water saturation regions and remained unchanged during growth in low water saturation regions. Pressure depletion from one end of the core induced a hydrate dissociation front starting at the depletion side and moving through the core as production continued. The final saturation of water after hydrate dissociation was more uniform than the initial water saturation, demonstrating the significant redistribution of water that will take place during methane gas production from a hydrate reservoir.

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