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1. A novel critical velocity model for the incipient motion of non-spherical particles on cuttings bed in extended reach wells NSTL国家科技图书文献中心

Hu, Wei |  Guan, Ning... -  《Particuology》 - 2025,97 - 193~206 - 共14页

摘要: particles. A balance equation for the threshold Shields |  number, determined by particle driving forces and | Accurately predicting the minimum velocity |  required to initiate particles movement on a cuttings bed |  surface during drilling operations is crucial for
关键词: Cuttings transport |  Critical velocity |  Predictive model |  Particle shape effect |  Experimental study

2. Hypervelocity impact against aluminium Whipple shields in the shatter regime with systematic parameter variation: An experimental and numerical study NSTL国家科技图书文献中心

Rannveig Marie Faerg... |  Lorenzo Olivieri... -  《International journal of impact engineering》 - 2025,195(Jan.) - 105126.1~105126.23 - 共23页

摘要:Aluminium Whipple shields are commonly used to |  of protective shields, experimental studies of HVI |  velocity range, to a high number of smaller fragments and |  AA6061-T6 Whipple shields is performed, where the |  protect spacecraft against hypervelocity impacts (HVIs
关键词: Hypervelocity impact |  Experimental |  Whipple shield |  Aluminium |  Spacecraft shielding

3. (108715)Design of lossy dielectric polymer nanocomposite alternating A-B multilayers for absorption-dominated EMI shielding in the X-band regime NSTL国家科技图书文献中心

Frederik Van Loock |  Pramod Ravichandran... -  《Composites,Part A.Applied science and manufacturing》 - 2025,191 - 1~14 - 共14页

摘要: polymer nanocomposite multilayer shields is explored via | . The A-B multilayer shields comprise of two or more |  performance becomes independent of the number of layers when | The role of permittivity mismatch and of |  individual layer thickness on the electromagnetic
关键词: EMI shielding |  Absorption |  PMMA-CNT nanocomposite |  Multilayer |  Finite element simulation |  X-band regime

4. Radiation Shielding and Spectroscopic Investigations of Newly Produced Co and Ni Based Super Alloys NSTL国家科技图书文献中心

Murat Aygun |  Zeynep Aygun... -  《iranian journal of science》 - 2025,49(2) - 559~573 - 共15页

摘要: number, half-value layer, mean free path, effective |  conductivity, effective electron number, exposure and energy |  atomic number, improves the radiation attenuation |  shields in high temperature applications such as nuclear | With the rise in applications involving high
关键词: CoBSAs |  NiBSA |  Radiation protection characteristics |  Spectroscopic results

5. An investigation of some ionizing radiation interaction parameters with selected composition alloys NSTL国家科技图书文献中心

Abdelmonem, A. M. |  Salaheldin, Ghada... -  《Radiation Physics and Chemistry》 - 2025,226 - 共15页

摘要:), Effective atomic number (Z(eff)), Mean free path (MFP |  as gamma shields was examined using software (Phy_X | The present work examined gamma-ray and |  neutron shielding capabilities of substances, including |  CS(516), SS(403), SS(410), SS(316), SS(316L), SS
关键词: Gamma-ray and neutron interaction |  Alloys |  Radiation shielding |  Software analysis

6. Structural basis and bonding mechanisms for mechanical and thermal properties of rare earth oxides NSTL国家科技图书文献中心

Kaili Chu |  Yanning Zhang... -  《Journal of the American Ceramic Society》 - 2025,108(4) - 20305~ - 共11页

摘要: atomic number owing to the lanthanide contraction |  properties of RE2O3, but also shields light on the | Abstract In this work, we have investigated |  the mechanical and thermal properties of rare earth |  sesquioxides A/B/C‐RE2O3 (RE = La to Lu) by using the first
关键词: first‐principles calculation |  mechanical properties |  P‐V‐L theory |  rare earth oxides |  thermal conductivity

7. Examination of radiation shielding features of Bi 2 O 3 modified Lithium Zinc Silicate glass system NSTL国家科技图书文献中心

Alyami, Jaber |  Sayyed, M. I.... -  《Radiation Physics and Chemistry》 - 2025,226 - 共7页

摘要: effectiveness of the samples as shields will increase with the |  compared the effective atomic number (Z(eff)) for the | In this study, several radiation shielding |  characteristics of Bi2O3 modified Lithium Zinc Silicate glass |  systems were reported using the Phy-X program. The mass
关键词: Radiation shielding glasses |  Half value layer |  Phy-X program

8. Flexible and lightweight radiation shielding sponges consisting of sulfated tungsten oxide and bismuth halide composites NSTL国家科技图书文献中心

Mahalingam, Shanmuga... |  Kang, Seok-Gyu... -  《Journal of industrial and engineering chemistry》 - 2025,142 - 613~621 - 共9页

摘要:-metal shields. This study investigates the development | . The composite leverages the high atomic number and | Lead's high density (density of 11.34 g/cm3 | ) facilitates X-ray attenuation, but its mass and toxicity |  limit applicability. Therefore, it is essential to
关键词: Sulfated |  Tungsten oxide |  Porous structure |  Bismuth iodide |  X-ray shielding

9. The antimony‑doped phosphate glasses system’s optical, radiation‑shielding, and physical properties NSTL国家科技图书文献中心

Gharam A. Alharshan |  Shaaban M. Shaaban... -  《Optical and Quantum Electronics》 - 2025,57(1) - 31.1~31.35 - 共35页

摘要: atomic number, half value layer, tenth value layer |  data was compared to traditional radiation shields | The primary focus of this study is the |  influence of antimony oxide on the radiation-attenuating | , optical, and physical characteristics of the (65-x
关键词: Radiation-shielding properties |  Half value layer |  Antimony oxide |  Optical absorption |  (E_(OPT)) |  NBOs

10. Influence of cnoidal wave-induced seepage force on shields number in shallow water (ID: OE-D-24-02235) NSTL国家科技图书文献中心

Wang Z. |  Pan J.... -  《Ocean engineering》 - 2024,310(Oct.15 Pt.2) - 1.1~1.11 - 共11页

摘要: water. A new modified Shields number was derived |  sand particles by lowering the maximum Shields number |  considerably decrease the maximum Shields number. | ? 2024 Elsevier LtdSediment incipient motion |  in shallow water is a major concern for coastal
关键词: Nonlinear shallow water waves |  Sediment incipient motion |  Seepage force |  Shields number
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