39 Result(s)
within
**-Hua Qu
Engineering
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Chapter and Conference Paper
Reflection and Improvement of Staged Fracturing Technology for Coalbed Methane Horizontal Well in Qinshui Basin
L-type single horizontal well has become a new well type for CBM development in the Qinshui Basin. The staged fracturing of horizontal wells has gradually become an important means for increasing production of CB...
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Chapter and Conference Paper
Experimental Study on Migration and Placement Morphology of Proppant Combinations with Different Particle Sizes in Active Water Fracturing
In order to optimize the proportion of proppant with different particle sizes in active water fracturing of coalbed methane wells, a large-scale visual parallel plate fracturing proppant migration simulation d...
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Article
Stabilization technology and corrosion mechanism of rust layer on Q370 weathering steel surface
A newly developed rust layer on Q370qENH weathering steel (sample C) was studied under dry–wet cycle test of 3.5 wt.% NaCl solution and salt spray test, compared with the bare weathering steel (sample A) and t...
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Article
Effect of solution treatment on microstructure and mechanical properties of as-cast Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy
Effect of solution treatment on microstructure and mechanical properties of Al-12Si-4Cu-2Ni-0.8Mg-0.2Gd alloy was investigated. Results show the Si particles become stable and more intermetallic compounds diss...
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Article
Open AccessFire Intumescent, High-Temperature Resistant, Mechanically Flexible Graphene Oxide Network for Exceptional Fire Shielding and Ultra-Fast Fire Warning
Graphene oxide-based hybrid networks were fabricated via introducing multi-amino molecule with triple roles (i.e., cross-linker, fire retardant and reducin...
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Chapter and Conference Paper
Evaluation of Reasonable Productivity of Horizontal Wells in Offshore Carbonate Gas Reservoirs
1 exploration well has been drilled in the target gas field, and coring and production test have been carried out. It is planned to deploy a horizontal well in the high part of the gas reservoir for depletion ...
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Article
Interface characteristics between TiN and matrix and their effect on solidification structure
Heterogeneous nucleation is an effective way to promote the dispersion and precipitation of second-phase particles in steel and refine the grain size of the solidification structure. Not only refining as-cast ...
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Article
Moving target detection based on improved ghost suppression and adaptive visual background extraction
Visual background extraction algorithm (ViBe) uses the first frame image to initialize the background model, which can easily introduce the “ghost”. Because ViBe uses the fixed segmentation threshold to achiev...
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Chapter and Conference Paper
Distributed Database Design and Heterogeneous Data Fusion Method Applied to the Management and Control Platform of Green Building Complex
Ecological green has become the basic national policy in China. Green buildings are springing up in large numbers, but there are few corresponding solutions. In view of the characteristics of various complex d...
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Article
Thermodynamic analysis on tin precipitation behavior in Ti-bearing peritectic steel after magnesium treatment
TiN, which is ubiquitous in Ti-bearing steel, has a critical influence on both the mechanical properties and the welding process of steel, and therefore researche on the precipitation behavior of TiN in molten...
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Article
An improved PSO algorithm for time-optimal trajectory planning of Delta robot in intelligent packaging
With the advancement of the times, robotics technology is also develo** rapidly. Some large enterprises in China use robots to work in manufacturing and handling positions, and also make robots more and more...
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Article
A novel adsorbent of three-dimensional ordered macro/mesoporous carbon for removal of malachite green dye
Three-dimensional ordered macro/mesoporous carbon (3DOM/m-C) with high specific surface area was synthesized by colloid crystal template method with chemical activation by KOH and used as the adsorbent for rem...
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Article
Aluminum, titanium and oxygen control during electroslag remelting of stainless steel based on thermodynamic analysis
Experimental investigation and thermodynamic calculation were carried out to study the effect of slag on alloying elements during electroslag remelting with develo** a thermodynamic model to control titanium...
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Article
Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment
Cementites decomposition of a pearlitic ductile cast iron during graphitization annealing heat treatment was investigated. Fractographies and microstructures of heat treated samples were observed using a scann...
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Article
Refinement and fracture mechanisms of as-cast QT700-6 alloy by alloying method
The as-cast QT700-6 alloy was synthesized with addition of a certain amount of copper, nickel, niobium and stannum elements by alloying method in a medium frequency induction furnace, aiming at improving its s...
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Article
Three-stage approach for dynamic traffic temporal-spatial model
In order to describe the characteristics of dynamic traffic flow and improve the robustness of its multiple applications, a dynamic traffic temporal-spatial model (DTTS) is established. With consideration of t...
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Article
Preparation of U-shaped curved holes by a casting method
A technique to prepare U-shaped curved holes by a direct casting method was introduced, and U-shaped curved holes (with a diameter of 2 mm) with an aspect ratio of 35 were successfully prepared. A formula was ...
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Article
Wear behavior and mechanism of a sliding pair of 0. 1C-3Cr-2W-V nitrided steel rubbing against an aluminum bronze alloy
Wear behavior and mechanism of plasma nitrided steel oscillating against a heat-treated and an untreated aluminum bronze alloy were investigated using an Optimol SRV tribometer. The influence of heat treatment...
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Article
Influence of Cr element on impact fracture process of ductile Ni-resistant alloyed iron at low temperature
In this study, in order to investigate the influence of Cr element on the impact fracture process of ductile Ni-resistant alloyed iron at low temperature, different contents of Cr element were added to ductile...
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Chapter and Conference Paper
A Novel Weighted Average Index Method of Interval Valued Intuitionistic Fuzzy Sets and Its Application to Outsourced Software Project Risk Assessment
A novel weighted average index model of interval valued intuitionistic fuzzy sets (IVIFS) is presented in this paper. By analyzing the interval of membership degree, the interval of non-membership degree and t...
