Article
Engineering, Geological
Quan Zhang, Zhigang Tao, Chun Yang, Shan Guo, Manchao He, Chongyuan Zhang, Huiya Niu, Chao Wang, Shen Wang
Summary: An innovative non-explosive technology called Instantaneous Expansion (IE) was developed for tunneling. Experimental and numerical results showed that IE achieved outstanding directional rock breaking and caused the least damage to the surrounding rock. The tunnel cross-section created by IE was flat and smooth. Compared to conventional blasting (CB) and shaped charge blasting (SCB), IE reduced over/under-excavation area and excavation-induced damage zone, contributing to improved long-term stability of the roadway.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Huihui Geng, Xiaofei Xu, Zhipeng Lai, Quanliang Cao, Liang Li
Summary: A novel non-contacting electromagnetic cold expansion process (SEMCE) was developed to improve the fatigue life of hole component. Numerical simulation and experimental results showed that SEMCE process significantly enhanced the fatigue performance of the specimens by inducing grain refinement and improving surface integrity near the hole.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Chemistry, Multidisciplinary
Jinyang Zhang, Shiquan Lin, Zhong Lin Wang
Summary: We developed a pixeled droplet triboelectric nanogenerator (pixeled droplet-TENG) array with high-density electrode array to measure the charge transfer at a liquid-solid interface when a water drop moves on a hydrophobic surface. We observed that the transferred charges are not uniformly distributed along the path, possibly due to the two-step model of electron transfer and ion adsorbed on the solid surface, forming an electric double layer that shields the net surface charge on the solid surface.
Article
Ecology
Xue Li, Chongyu Ye, Dongming Fang, Qiangfa Zeng, Yanjiang Cai, Huaqiang Du, Tingting Mei, Guomo Zhou
Summary: The explosive growth of new culm of Moso bamboo relies on both previous carbon storage and newly photosynthesized carbohydrates, and the carbon transfer may be coordinated with water transportation between the culms. Before the new culm leafing, there are significant transferred carbohydrates and newly photosynthesized carbohydrates from the attached culm.
FRONTIERS IN FORESTS AND GLOBAL CHANGE
(2022)
Article
Construction & Building Technology
Santosh Reddy Kommidi, Yong-Rak Kim
Summary: This study investigated the feasibility of using dynamic shear rheometer (DSR) to characterize the low temperature behavior of binders. By converting DSR test results to BBR beam deflection and improving prediction methods, it was demonstrated that DSR testing can be a good supplemental or alternative method to BBR.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Mateus M. de Oliveira, Renato R. Aleixo, Denise F. Resende, Leandro R. M. Silva, Rafael S. Salles, Carlos A. Duque, Paulo F. Ribeiro
Summary: This paper examines the dynamic impedance estimation of electrical systems from online measurements, highlighting the challenges and solutions, such as transducer equalization, harmonic synchrophasor estimation, and ICA-based dynamic impedance estimation. Results show that online and adaptive equalization, along with oversampling algorithms, can improve the estimation accuracy.
APPLIED SCIENCES-BASEL
(2021)
Article
Medicine, Legal
Jack B. Reither, Emma Gray, Annalisa Durdle, Xavier A. Conlan, Roland A. H. van Oorschot, Bianca Szkuta
Summary: This study investigates the prevalence and transferability of bDNA on flooring surfaces within occupied houses, finding that DNA collected directly from the floor has more quantity, number of contributors, and likelihood of observing a major contributor compared to that collected from cotton swatches after contacting the floors. The level of reported activity by occupants within areas of the same room is not correlated with the quantity of DNA recovered from the flooring.
FORENSIC SCIENCE INTERNATIONAL
(2021)
Article
Computer Science, Information Systems
Yihang Li, Qingxuan Shi, Jingya Song, Fang Yang
Summary: This paper presents a multi-task learning framework, called the dynamic information transfer network (DITN), for improving pose estimation. By constructing two branches with a shared backbone, the network leverages explicit structural knowledge to localize human joints and bones. Dynamic information transfer is used to refine joint localization using bone information. Experimental results demonstrate the effectiveness of DITN, achieving high performance on datasets with heavily occluded or confusable joint localization.
Article
Physics, Condensed Matter
Shi-Jie Lv, Geng-Xin Yin, Hong-Ling Cui, Hai-Yan Wang
Summary: The new phase of In2Se3 discovered in this study exhibits stable dynamics and an indirect band gap, making it a potential candidate for nonlinear optical crystal applications.
SOLID STATE COMMUNICATIONS
(2021)
Article
Mathematics, Interdisciplinary Applications
Xianjun Wu, Mingqiu Wang, Wenting Hu, Guo-Liang Tian, Tao Li
Summary: When dealing with data containing outliers or heavy-tailed distributions, traditional least squares with penalty function is not suitable. With the development of science and technology, high-dimensional data with strong correlation and redundancy has been generated. Therefore, it is necessary to find an effective variable selection method based on robust techniques to handle collinearity. This paper proposes a penalized M-estimation method based on standard error adjusted adaptive elastic-net, which utilizes M-estimators and their standard errors as weights. The theoretical proof demonstrates the consistency and asymptotic normality of this method. The proposed method reduces dimensionality using multi-step adaptive elastic-net in high-dimensional space and selects variables and estimates parameters using the proposed method. Simulation studies and real data analysis confirm the finite sample performance advantages of the proposed method compared to other commonly used methods.
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY
(2023)
Article
Energy & Fuels
Slawomir Blasiak
Summary: This article introduces a variable-order derivative time fractional model to describe heat transfer in non-contacting mechanical face seals, providing detailed information on heat transfer phenomena during startup. The model was solved numerically, with the objective of comparing results from different heat transfer equations. The mathematical analysis based on fractional differential equations is suitable for developing detailed mathematical models describing physical phenomena.
Article
Materials Science, Ceramics
Qi Song, Zhitao Cheng
Summary: This research investigates the dynamic mechanical properties and fracture behavior of TiB2-SiC/B4C composite ceramics under high strain rates. The results show that these composite ceramics have excellent dynamic compression strength (2750 MPa) and a pronounced strain-rate strengthening effect. The Hugoniot elastic limit is calculated as 18.49 GPa, and the dynamic fracture mechanisms are summarized into three main points: the strengthening effect of in situ second phases, the mixed-inter/transgranular fracture mode for energy absorption, and the role of anchoring effect and thermal expansion coefficient mismatch in energy dissipation and fracture toughness improvement. This work provides a foundation for the application and development of lightweight armor ceramic materials.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Mechanics
Christophe Garnier, Vincent Faucher, Pierre Lamagnere
Summary: This paper discusses the dynamic response of a cylindrical structure under internal pressure and analyzes it by extracting DLF coefficients. The results show that radial and axial displacements are coupled, and the dynamic analysis results are validated for long cylindrical structures, but the differences in axial displacement increase with an increase in the ratio of radius to length in shorter cylindrical structures.
Article
Chemistry, Medicinal
Shubhajit Paul, Yin-Chao Tseng
Summary: The study found that the acoustic-derived elastic modulus can be used to estimate the size of internal defects in tablets, ensuring the robustness of drug products. The model showed that the flaw size is related to the powder mechanical properties and tablet microstructure.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2021)
Article
Mathematics, Interdisciplinary Applications
Yue Mei, Jianwei Deng, Xu Guo, Sevan Goenezen, Stephane Avril
Summary: Regularized virtual fields method (VFM) is proposed to reduce the effects of uncertainty in inverse problem resolution. While successful in accurately detecting stiffness differences, regularization may also introduce unexpected spurious effects in the results.
COMPUTATIONAL MECHANICS
(2021)