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Showing 4,621 - 4,640 results of 15,724 for search 'determined (coefficient OR efficient) (method OR methods)', query time: 0.37s Refine Results
  1. 4621

    Evaluating the performance of Moroccan social incubators: an SFA analysis of youth platforms under the national initiative for human development by Younes El Maaqili, Mariam Tlemcani Mhandez, Abdessamad Ouchen

    Published 2025-06-01
    “…Research methodology – Based on a sample of 40 NIHD youth platforms, the stochastic frontier analysis (SFA) method was applied to measure their technical efficiency (TE), and then the  determinants of the TE obtained were analysed by a regression using the Tobit model.  …”
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  2. 4622
  3. 4623

    Application of novel oligomeric Co(II) complexes of 4,4′-bipyridine and 1,10-phenanthroline modified glassy carbon electrode for differential pulse voltammetric determination of ci... by Mezgebu Biresaw, Adane Kassa, Getinet Tamiru Tigineh, Atakilt Abebe

    Published 2025-02-01
    “…The recovery results for tablet and urine samples ranged from 99.44 % to 99.95 % and 99.25 % to 100.51 %, respectively, with interference recovery showing an error of less than 4.73 %. When it came to determining CPF in tablet formulations and human urine samples, the new approach outperformed recently published voltammetric methods. …”
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  4. 4624

    INCREASING CENTRIFUGAL PUMP PERFORMANCE by S. V. Mikhaylova, I. A. Pogrebnaya

    Published 2019-08-01
    “…Objectives Investigate the prospect of improving the quality of centrifugal pumps in oil production.Method The method is based on energy-efficient installations for high-yield wells - the steps of the Borets-Weatherford installations and the Borets PC stages.Result The main hydraulic characteristics of electric centrifugal pumps with the use of energy-efficient stages with the recommended feed range have been developed. …”
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  5. 4625

    Presenting a model for determining the level of technological complexity of research and development activities in knowledge-based companies (case study: companies based in Golesta... by Gholamali shahmoradi, Taghi Torabi, Reza Radfar, Mohammadhasan Cheraghali

    Published 2025-03-01
    “…Research and development activities make it possible for knowledge-based companies to adapt to the changes and fluctuations in the market through efficient methods, offer new products and achieve sustainable competitive advantages. …”
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    Article
  6. 4626

    EVALUATION OF SUBSOIL MASSIF STABILITY TAKING INTO ACCOUNT THE IRREGULARITY OF CONSTITUENT ROCKS ON THE BASIS OF A RANDOM SIZE AND FUNCTION MODEL by M. O. Allaev

    Published 2017-03-01
    “…The use of the random function model when solving the problem of forecasting the stability of the massif enables the evaluation of such important parameters of the safe development of the landslide process as probability of occurrence, i.e. the decrease below the permissible level of the safety coefficient, and the time period of development, so as to maintain the safety status of the massif.A method for determining the cost of maintaining the necessary stability or reliability coefficient value at a time when their calculated values are less than the respective permissible values is shown. …”
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  7. 4627
  8. 4628

    Simultaneous Component Analysis of <i>Akebia quinata</i> Seeds (Lardizabalaceae) by Ultra-Performance Liquid Chromatography–Tandem Mass Spectrometry for Quality and Cytotoxicity As... by Chang-Seob Seo, Jaemoo Chun, Kwang Hoon Song

    Published 2025-02-01
    “…The separation of the eight analytes was performed in an Acquity UPLC BEH C<sub>18</sub> reversed-phase analytical column. The method was validated with respect to linearity (coefficient of determination ≥ 0.994), recovery (90.32–108.18%; relative standard deviation (RSD) < 10.0%), and precision (RSD < 10%). …”
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    Article
  9. 4629

    Predicting the critical drainage induced by soil seepage failure during pumping in foundation pit construction by Fuwei JIANG, Shujun TANG, Xiaofei DENG, Zhenchao LI, Fawang ZHANG, Hongyuan YIN

    Published 2025-01-01
    “…However, the critical pumping quantity is a key parameter for pumping safety in foundation pit construction and there is no effective method to calculate or test this parameter. Based on Darcy’s law and the equivalent infinitesimal formula, and the formula for calculating the permeability coefficient of pumping tests recommended by the specification for borehole pumping test of hydropower projects (NB/T 35103—2017), this study deduced the expressions of critical pumping quantity of the seepage failure under four conditions, including submersible incomplete hole, submersible integral hole, confined water incomplete hole and confined water integral hole. …”
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  10. 4630

    Distribution of Heterogeneous, Highly Impure Soy Material in a Deep Air Channel by M. N. Moskovskiy, S. I. Borzenko

    Published 2023-12-01
    “…(Research purpose) The research aims to determine the optimal efficiency of separating heterogeneous bulk mixtures in a vertically ascending air channel. …”
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    Article
  11. 4631

    Prevalence and determinants of HIV among reproductive-age women (15–49 years) in Africa from 2010 to 2019: a multilevel analysis of demographic and health survey data by Alemu Gedefie, Amare Muche, Anissa Mohammed, Aznamariam Ayres, Dagnachew Melak, Eyob Tilahun Abeje, Fekade Demeke Bayou, Fekadeselassie Belege Getaneh, Lakew Asmare, Abel Endawkie

    Published 2025-01-01
    “…Thus, the aim of this study was to identify the determinants of HIV among reproductive-age women in Africa.MethodsThis study was conducted among reproductive-age women in Africa, based on secondary data obtained from the Demographic Health Survey (DHS) conducted between 2010 and 2019. …”
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  12. 4632

    Evaluating Material Parameter Influence on Drapability Using VStitcher by Malin Schiller, Soraya Flohr, Jeanne Marisol Delmas, Anja Krüger, Anne-Marie Miene, Patrizia Zimmermann, Lena Wolf, Miriam Seffers, Michelle-Sophie Ruchay-Drammeh, Ulrike Reinhardt, Lilia Sabantina

    Published 2025-01-01
    “…A drape test is used as a validation method and the drape coefficient is calculated. Depending on the material and parameter settings, drape coefficients between 0.1 and 10% and between 0.7 and 70% are determined. …”
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  13. 4633
  14. 4634
  15. 4635

    Development of silver-doped carbon dots sensor derived from lignin for dual-mode fluorometric and spectrophotometric determination of valsartan in a bulk powder and a commercial pr... by Fatemah Aldakhil, Nawal A. Alarfaj, Salma A. Al-Tamimi, Maha F. El-Tohamy

    Published 2024-12-01
    “…The nano sensor efficiently assessed the presence of VAL in pharmaceutical tablets and produced a favorable outcome with the mean of recovery of 98.91 % and 99.76 % with relative standard deviation (RSD%) of 0.79 and 0.78 for the fluorometric and spectrophotometric methods, respectively.…”
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  16. 4636

    Areas of energy advantage for flowsheets of separation modes for mixtures containing components with similar volatilities by M. E. Peshekhontseva, M. A. Maevskiy, I. S. Gaganov, A. V. Frolkova

    Published 2020-07-01
    “…The direct and indirect distillation modes can become competitive when the point of the original composition is located near single K-surfaces or in a region with a different ratio of distribution coefficients. Sharp distillation is not suitable for the separation of a mixture containing a pair of components exhibiting relative unity volatility with medium boiling points.Methods. …”
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  17. 4637

    Benchmarking the efficiency of distribution warehouses using a four-phase integrated PCA-DEA-improved fuzzy SWARA-CoCoSo model for sustainable distribution by Song Meijing, Andrejić Milan, Pajić Vukašin, Chatterjee Prasenjit, Ma’arof Muhammad Izzat Nor

    Published 2024-12-01
    “…IMF SWARA is applied to determine criteria weights, while the CoCoSo method is employed in the last phase for ranking efficient warehouses. …”
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  18. 4638

    SURFACE OSCILLATIONS IN OPEN RESONATORS WITH CURVILINEAR REFLECTORS by I. K. Kuzmychov, O. S. Lukash, O. B. Senkevych, O. V. Gribovsky

    Published 2025-03-01
    “…The electric field structures of considered oscillation types were measured using the probe-induced perturbation method. The resonant transmission coefficients of the open oscillating systems and the physical phenomena within them were experimentally studied with the aid of well-known microwave measurement techniques. …”
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  19. 4639

    Study on Semi-Rigid Joint Performance and Stability Bearing Capacity of Disc-Type Steel Pipe Support by Fankui Zeng, Guoxin Zou, Meng Ji, Jianhua Zhang

    Published 2025-06-01
    “…Numerical simulation and analytical correction method were employed to determine the effective length correction coefficient <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi mathvariant="sans-serif">μ</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></semantics></math></inline-formula> under various erection parameters while accounting for joint semi-rigidity. …”
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  20. 4640