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Showing 4,541 - 4,560 results of 15,724 for search 'determined (coefficiency OR efficient) (method OR methods)', query time: 0.33s Refine Results
  1. 4541

    Determination of chlorinated paraffins in PM2.5 by QuEChERS combined with ultra-high performance liquid chromatography-quadrupole/orbitrap high resolution mass spectrometry by Wenyan YAN, Chao WANG, Juan LIU, Yibin SUN, Wen GU, Yifu LU, Ke FANG, Yi WAN, Song TANG

    Published 2024-10-01
    “…Simultaneous extraction and determination of SCCPs, MCCPs, and LCCPs in PM2.5 could provide technical support for their environmental monitoring and human health risk assessment.ObjectiveTo establish a method based on QUEChERS pretreatment method in conjunction with ultra-performance liquid chromatography-quadrupole/orbitrap high resolution mass spectrometry for simultaneously determining the levels of SCCPs, MCCPs, and LCCPs in PM2.5. …”
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  2. 4542
  3. 4543
  4. 4544

    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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  5. 4545
  6. 4546

    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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  7. 4547

    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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  8. 4548
  9. 4549

    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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  10. 4550
  11. 4551
  12. 4552

    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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  13. 4553

    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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  14. 4554

    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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  15. 4555

    Monetary revenues as a major indicator of the living standards of the population of Russia by E. N. Grishina, I. P. Lapteva, L. N. Trusova

    Published 2019-07-01
    “…Along with traditional statistical methods,  the study  also used  the  method  of assessing structural  differences,  the method  of index  analysis  of the differentiation  of the population  by monetary  income at both the Federal and regional levels. …”
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  16. 4556

    Thermal expansion of (MnIn<sub>2</sub>S<sub>4</sub>)<sub>1-x</sub>•(AgIn<sub>5</sub>S<sub>8</sub>)<sub>x</sub> solid solutions by Chan Bin Tkhan, I. V. Bodnar

    Published 2019-06-01
    “…The thermal expansion of single crystals of solid solutions (MnIn2S4)1–х•(AgIn5S8)х was measured by the dilatometric method in the temperature range 80–450 K. The coefficients of thermal expansion are determined and their concentration dependences at different temperatures are constructed. …”
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  17. 4557

    Determination of correlation between cytokines IL 6, IL8, IL10, IL12, IL17 and severity of hepatocellular carcinoma in patients having hepatitis C by Ishtiaq Ahmad, Hamidullah, Ashraf, Murad Ali, Manzoor Hussain, Rehman Ud Din

    Published 2024-11-01
    “… Objective: To determine the correlation between the levels of interleukins 6, 8, 10, 12 and 17 and the severity of hepatocellular carcinoma in patients positive for hepatitis C. …”
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  18. 4558

    ELASTIC CHARACTERISTICS OF BRUSH PILE ON THE MUNICIPAL MACHINE WORKING EQUIPMENT by S. D. Ignatov, S. I. Tsekhosh

    Published 2019-03-01
    “…Moreover, the authors discuss the factors affecting the quality of the road surface cleaning and the brush pile resource.Materials and methods. The research presents the results of the interaction process of the BWB pile with the cleaned surface of the roadway. …”
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  19. 4559

    Optimization of friction and electrical resistance performance in graphite-copper electrical contacts using Taguchi-based grey relational analysis by Bekhouche Djamel, Bouchoucha Ali, Zaidi Hamid

    Published 2024-01-01
    “…A gray relational grade obtained from gray relational analysis was employed to assess the performance characteristic in the Taguchi mixed L18 (2 1 x 3 2) method. The Taguchi design method determined the optimal control factors that affect the friction coefficient and electrical resistance. …”
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  20. 4560

    DIFFUSION-WEIGHTED MAGNETIC RESONANCE IMAGING IN THE DIAGNOSIS OF INTERVERTEBRAL DISC DEGENERATION IN THE LUMBOSACRAL SPINE by V. A. Byval’tsev, I. A. Stepanov, A. A. Kalinin, E. G. Belykh

    Published 2017-01-01
    “…Objective: to quantify the degree of degeneration of intervertebral discs (IVDs), by constructing functional diffusion-weighted imaging (DWI) maps, and to determine a correlation between the measured diffusion coefficient (DC) values and IVD changes on T1- and T2-weighted images. …”
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