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Showing 201 - 220 results of 2,364 for search '(( variable friction efficient. ) OR ( variable function (coefficiency. OR efficiency.) ))', query time: 0.15s Refine Results
  1. 201

    Assessment of Cardiac Autonomic Function by Short-Term Sensor-Based and Long-Term Heart Rate Variability Analyses in Individuals with Spinal Cord Injury After Long-Term Table Tenni... by Georgia Vogiatzi, Vasiliki Michou, Nikos Malliaropoulos, Vasileios Tsimaras, Asterios Deligiannis, Evangelia Kouidi

    Published 2024-11-01
    “…Our results indicate that a 6-month table tennis training program is efficient and can improve cardiac ANS activity mainly by increasing sympathovagal balance.…”
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    Article
  2. 202

    Research Progress on Surface Design and Solid-Liquid Composite Lubrication Technology of Friction Pairs in High-Pressure Plunger Pumps by CUI Bin, HOU Shanshan, ZHANG Rui, LI Panpan, LIU Xiaohong, JI Li, LI Hongxuan

    Published 2025-04-01
    “…Plunger pumps, as one of the most critical power components in mechanical hydraulic systems, are widely used in aerospace, construction machinery and other fields due to their advantages of high rotational speed, high pressure, high transmission efficiency, diverse variable displacement mechanisms and high power density.In recent years, with the development of new-generation high-speed, high-pressure, intelligent and long-life mechanical hydraulic systems, more stringent adaptive requirements have been placed on the safety, stability and reliability of plunger pumps.The tribological performance of the three key friction pairs (plunger pair, valve assembly pair and slipper pair) of plunger pump under high-speed and high-pressure conditions is the critical factor limiting the service life of plunger pumps, determining the stability and reliability of mechanical hydraulic systems.This article first introduced the friction and wear problems of the three key friction pairs of plunger pumps and the forms of lubrication failure, and then summarized the surface treatment technologies for improving the friction and wear of the key friction pairs of plunger pumps and compared them.Finally, based on the service conditions and research status of plunger pumps, the issues that needed to be solved for the lubrication of plunger pump friction pairs in the new generation of mechanical design were proposed, and prospected these issues.…”
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  3. 203
  4. 204

    Solutions of Bessel’s Differential Equations by Variable Change Method by Beyalfew Anley, Daba Meshesha Gusu, Tolosa Nigussie

    Published 2024-01-01
    “…In this article, the solutions of Bessel’s differential equations (DEs) by variable change method are formulated. To do so, we have considered the first and second kind of Bessel’s functions which are obtained as solutions of Bessel’s equations and it is used to determine the solutions of the lengthening pendulum (LP). …”
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  5. 205

    Variable-Rate Incremental-Redundancy HARQ for Finite Blocklengths by Yu Fu, Angel Lozano, Hongwen Yang

    Published 2025-01-01
    “…The optimization relies on a finite-blocklength information-theoretical analysis, whereby the block error rate emerges as a function of the channel capacity and the channel dispersion. …”
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  6. 206
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  8. 208

    Bio-optical variability of particulate matter in the Southern Ocean by Juan Li, Juan Li, David Antoine, David Antoine, Yannick Huot

    Published 2024-10-01
    “…Here, we combined field measurements from hydrographic casts from two research voyages and from autonomous profiling floats (BGC-Argo) to examine particulate bio-optical properties and relationships among several ecologically and optically important variables, namely the phytoplankton chlorophyll a concentration (Chl), the particulate absorption coefficient (ap), the particulate backscattering coefficient (bbp), and the particulate organic carbon (POC) concentration. …”
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  9. 209

    Spatial variability of the snow depth on mountain slope in Svalbard by P. A. Chernous, N. I. Osokin, R. A. Chernov

    Published 2018-09-01
    “…The study was carried out to estimate the spatial variability of snow cover depths in avalanche centers of the mountain slopes of Svalbard. …”
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  10. 210

    Variable Selection and Parameter Estimation with the Atan Regularization Method by Yanxin Wang, Li Zhu

    Published 2016-01-01
    “…Many variable selection techniques may be implemented by penalized least squares using various penalty functions. …”
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    Article
  11. 211

    Modular and efficient assembly of CRISPR vectors and construction of an apple gene editing efficiency evaluation system by HOU Feifan, HUANG Chuanmi, HAO Pengbo, CONG Liu, BAI Tuanhui, SHI Jiangli, WANG Miaomiao, LIU Yu, ZHAO Yujie, WAN Ran, SHEN Yawen, ZHANG Hengtao, ZHANG Kunxi, ZHENG Xianbo, JIAO Jian

    Published 2025-08-01
    “…Furthermore, vacuum infiltration mediated transient transformation of apple leaves confirmed PDS gene editing through RT-PCR amplification and Sanger sequencing of target loci, and preliminarily evaluated the editing efficiency of gRNAs targeting the apple PDS gene. The experimental data demonstrated variable editing efficiencies among distinct gRNAs. …”
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  12. 212

    An activity-based parametric cost analysis for upcycling machining chips to produce feedstock for sustainable additive friction stir deposition by Sweta Baruah, Joshua Hoekstra, Tony Schmitz

    Published 2025-07-01
    “…With the growing emphasis on supply chain resilience and efficiency, manufacturers are increasingly exploring sustainable material reuse strategies. …”
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  13. 213

    Energy-Efficient Office Renovation by Minyoung KWON

    Published 2020-01-01
    “… This research aims to develop user-focused design principles for energy-efficient office renovations. The goal of this is to improve the quality and comfort of workspaces without compromising on energy-saving goals. …”
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  14. 214

    Evaluation of remote sensing soil moisture data products with a new approach to analyse footprint mismatch with in-situ measurements by Qiuxia Xie, Li Jia, Massimo Menenti, Qiting Chen, Jingxue Bi, Yonghui Chen, Chunmei Wang, Xinju Yu

    Published 2024-12-01
    “…SMAP L3.0, ASCAT V3.0, ESA/CCI V7.1 and GLDAS V2.2) are vital for applications in hydrology, climate variability, and agriculture. This study uses a new SSM evaluation approach by combining temporal evolution, Coefficient of Variation (CV), Cumulative Distribution Function (CDF), evaluation metrics, and Triple Collocation Analysis (TCA) to assess SSM accuracy and spatial–temporal variability, particularly the impact of footprint mismatch when comparing retrieved SSM with in-situ measurements. …”
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  15. 215
  16. 216

    Exploring the Differential Geometry of Reliability Function: Insights from Lifetime Weibull Distributions Under Neutrosophic Environment by Nada Mohammed Abbas, Ghazi Abdullah, Ahmed Hadi Hussain

    Published 2025-06-01
    “…Also, we discuss the same results in a neutrosophic environment, with neutrosophic variables and coefficients from the neutrosophic real ring R(I), where we get similar results of the original approach. …”
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  17. 217

    Investigation on Free Vibration of Rotating Cylindrical Shells with Variable Thickness by Liu Xiangdong, Hou Xiaoli, Bai Bin, Zeng Maolin

    Published 2023-01-01
    “…In order to improve the performance and efficiency of the rotating cylindrical shell (RCS), one of the effective ways reduces the mass of the RCS. …”
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  18. 218

    The acoustic wave generation by a thin layer with variable temperature by Roman DYBA, Bronisław ŻÓŁTOGÓRSKI

    Published 2015-07-01
    “…It was shown that, in view of the low efficiency of the temperature—pressure conversion, it is necessary to generate large layer temperature changes to obtain the mean values of sound intensity, whereas the maximum of the modulus of the transmittance function of the source occurs even for very thin layers. …”
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  19. 219

    Development of an Artificial Neural Network Model to Predict the Tensile Strength of Friction Stir Welding of Dissimilar Materials Using Cryogenic Processes by Mingoo Cho, Jinsu Gim, Ji Hoon Kim, Sungwook Kang

    Published 2024-10-01
    “…The objective of this study was to develop an artificial neural network (ANN) model for predicting the tensile strength of friction stir welding (FSW) joints between dissimilar materials, with a particular focus on aluminum and copper, using cryogenic processes. …”
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  20. 220

    Soret and dufour impacts on radiative power-law fluid flow via continuously stretchable surface with varying viscosity and thermal conductivity by T. S. Khaleque, A. Hossain, M. D. Shamshuddin, Mohammad Ferdows, S. O. Salawu, Shuyu Sun

    Published 2024-10-01
    “…The uniqueness of this study lies in the consideration of fluid variable thermic conductivity and viscosity, which introduces a higher degree of realism into the analysis. …”
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