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Methods to Quantitatively Evaluate the Effect of Shale Gas Fracturing Stimulation Based on Least Squares
Published 2025-07-01“…The optimization targeted the perforation friction coefficient <italic>k</italic><sub>perf</sub> as the primary unknown variable. …”
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903
基于modeFRONTIER的离合器碟形弹簧多目标优化设计
Published 2011-01-01“…Based on the analysis of the working characters of disc springs in clutch,the mathematical model of multi-objective optimal design of disc springs is established with unified objective function method,which regards the minimization of the disc spring volume and its average variable quantity of working compress force within the scope of friction lining wear as optimal objectives.The optimization calculation is presented by using the software modeFRONTIER.The results indicate that the relevant performance of disc springs is significantly improved after optimal design,with the objective function values reduced by 36% and 6% respectively.The software modeFRONTIER,with its simplicity and efficient algorithm,solves optimization problems and improves design efficiency.…”
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904
Comparison and System Development of a Two-Coil and Three-Coil Inductive Link for Transcutaneous Power Transfer
Published 2025-01-01“…For devices with a relatively high power consumption and located right under the skin, wireless power transfer through an inductive link is the most reliable method to ensure robust and long-term functionality. However, the efficiency of these inductive links highly depends on the size, location and variable power consumption of the implant. …”
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905
Numerical and Experimental Study of a Hydrodynamic Analysis of the Periodical Fluctuation of Bio-Inspired Banded Fins
Published 2025-02-01“…By using a method of controlling variables, such as wave number, swing angle, and frequency, where only one independent variable is changed at a time while the others remain constant, the impact on thrust coefficient function and the obtained periodic variation laws governing hydrodynamic performance are studied. …”
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906
Analysis Method of Agricultural Total Factor Productivity Based on Stochastic Block Model (SBM) and Machine Learning
Published 2022-01-01“…It uses the SBM direction distance function and the Luenberger productivity index to measure the agricultural efficiency, total factor productivity, and their components. …”
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907
A Bayesian-Weighted Inverse Gaussian Regression Model with Application to Seismological Data
Published 2022-01-01“…In the proposed model, the complementary reciprocal of the location parameter of response variable is considered to be a linear function of the explanatory variables. …”
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908
Theoretical and technical concept of cemented backfill material for flexible enhanced thermal energy storage in coal underground space
Published 2025-04-01“…The research status of backfill mining is analyzed based on the current coal mining technology and the scientific concept of "cemented backfill material for flexible enhanced thermal energy storage (CBM–FETES)" is proposed by integrating the idea of functional filling. The core of CBM–FETES is to ensure the four essential conditions: the suitability of geological conditions, the feasibility of thermal storage and extraction technologies, high efficiency in heat and mass transfer, and the safety and stability of the operational cycle. …”
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909
Multi-objective design optimization of a transonic axial fan stage using sparse active subspaces
Published 2024-12-01“…Active subspace was used to compute the active variables via singular value decomposition and a hybrid polynomial correlated function expansion was used to construct a surrogate model on the active subspace. …”
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910
Analysis of Heat Transfer Performance in a Brayton Cycle Recuperator
Published 2021-02-01“…The characteristic curves of heat transfer rate, effectiveness, convection coefficient and Colburn factor are built for each of the studied geometries in function of the Reynolds number. …”
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911
Performance assessment of water vortex power plant: Effect of material type and blade number
Published 2025-06-01“…These results highlight that increasing the number of blades can enhance the rotation speed but may decrease efficiency, reflecting the importance of balancing design and function to achieve optimal performance.…”
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912
Performance evaluation of atmospheric water generation in different climates using thermoelectric cooling
Published 2025-04-01“…In contrast, the variable voltage mode improves efficiency by 30 %, albeit with a lower water yield. …”
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913
Zoning and Identification of Factors Affecting Illegal Livestock Grazing in Golestan National Park Using Logistic Regression
Published 2025-04-01“…The Aspect factor with a coefficient of 0.0015 was determined to be the least influential independent variable. …”
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914
A novel unified variational finite difference (VFD) solution method for optimal control problems
Published 2025-05-01“…This article is aimed to propose a simple yet efficient unified numerical strategy for solving both linear and non-linear optimal control problems. …”
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915
Techno-economic assessment of low-carbon ammonia as fuel for the maritime sector
Published 2025-06-01“…We incorporate three different cost levels for ammonia and a variable engine efficiency ranging from 35 % to 55 %. …”
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916
High-accuracy solution of pantograph differential equations subject to mixed boundary conditions via shifted Vieta–Lucas polynomials
Published 2025-08-01“…A Galerkin method (GM) is formulated for constant coefficient-type equations, and a spectral collocation method (SCM) is given for variable coefficient cases. …”
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917
Design of Hall power supply based on full bridge half bridge switching digital LLC resonant converter
Published 2025-02-01“…The LLC resonant converter is studied for half bridge full bridge dynamic topology switching and soft start, achieving high efficiency and wide range output. By establishing a fundamental model of LLC resonant converter, analyzing the characteristic curves of frequency and gain, selecting the values of K and Q, variable frequency control output voltage is achieved, and a low peak full bridge half bridge switching mode based on simultaneous frequency conversion and variable duty cycle is designed. …”
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918
Some Iterative Methods Free from Derivatives and Their Basins of Attraction for Nonlinear Equations
Published 2013-01-01“…First, we make the Jain's derivative-free method optimal and subsequently increase its efficiency index from 1.442 to 1.587. Then, a novel three-step computational family of iterative schemes for solving single variable nonlinear equations is given. …”
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919
A toolkit for facilitating markerless integration of expression cassettes in Komagataella phaffii via CRISPR/Cas9
Published 2025-05-01“…The 04576 locus showed the highest integration efficiency, while ROX1 had the highest transformation efficiency. …”
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920
Relación entre comunidad íctica y cobertura vegetal riparia en dos períodos hidrológicos (Eje Cafetero, Colombia)
Published 2011-08-01“…Therewere no significant differences (P>0.05) among the structural variables, the HYPE and the RVC. According to r and r2 the diet of most fish species did not vary as a function of RVC and HYPE; however, according to the CCA diet varies as a function of HYPE but not of RVC. …”
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