Experimental Study on Load Bearing Characteristics of Steel Fiber Reinforced Concrete Lining in the Soft Surrounding Rock Tunnel by Guang-yao Cui, Jia-suo Qi, Dao-yuan Wang

“…Steel fiber can improve the bearing capacity and deformation capacity of the lining structure so that the failure mode of the lining structure changes from brittle shear failure to ductile bending failure. It is concluded that steel fiber reinforced concrete can improve the toughness of lining. …”
Get full text

TRIPHENYLTIN (IV) GLUTARATES: SYNTHESIS, FT-IR AND MÖSSBAUER STUDIES by MOUHAMADOU SEMBENE BOYE, MOUHAMADOU BIRAME DIOP, MODOU SARR, AMINATA DIASSE-SARR, LIBASSE DIOP, ALAIN WATTIAUX

“…Overall, the spectra studies sheew existence of several caracteristic bands such as υ (C=O), υ (CO2–), υ (Sn–O), υ (Sn–Cl), vibrations of glutarate ions, and the intense doublet showing the presence of phenyl groups. …”
Get full text

Research on the influence of curtain grouting parameters on the stability of tunnel surrounding rock and lining structure under the action of local high water pressure by Lianhui Li, Zonglong Zhang, Changyong Nie, Xuebing Hu, Zongzhi Li, Liang Cheng, Wenfeng Zhang

“…The results show that with the increase of grouting thickness and its ratio of permeability, the maximum flow velocity and flow rate per liner meter in surrounding rock, the bending moments and axial forces, and the horizontal and vertical displacements of the lining structure all exponentially decrease, but safety factors at different positions of the lining structure first rapidly and then slowly increase. …”
Get full text

A Case Study of Cyclic Top Coal Weakening Process Based on Highly Tough Coal Seam with Partings by Zhaopeng Wu, Junhui Wang, Zhijun Wan, Jingyi Cheng, Luchang Xiong, Lizhu Zhao, Xiaogang Liu

“…In the context of highly tough top coal with partings at working face 110501 for fully mechanized top coal caving mining in Yushutian Coal Mine, effects of parting band and high toughness on top coal breaking were studied in terms of mechanism and extent, a multifunctional compound drilling field integrating blast weakening, water injection weakening, and gas extraction was purposefully designed, and a cyclic top coal weakening process for highly tough coal seams with partings was proposed. …”
Get full text

辊压机辊轴快速拆卸复合结构应力分析及应用研究 by 张胜泉, 边汉民, 宋亚杰, 孙学娟

“…It’s difficult to dismantle the reducer and bearings,when maintaining the roller press.So a new structure related to a link construction between the output shaft of the reducer and the axis was designed to replace them quickly.The construction mainly used end face key connection and bolt connection to transfer the torque and bending moment.However when caculating the stress of the structure by hand,it’s difficult to allot the proportion load between the key and bolts.Ansys software was used to analyze the stress of the structure.The quick replacing structure was modeled,meshed,constrained and loaded.Different detailed structure and bolt preload was considered.The analysis result shows that the preload affects composite structure stress the most.Structural change has a certain effect on the composite structure stress.The materials of bolts and key have great influence on the bearing capacity of composite structure.For RP140-65 roller press,the optimum parameters are selected.The preload should be set to 200 kN～ 250 kN.Non-through keyway composite structure makes the key stress lower.Key material should be selected higher performance than 45 steel.Bolts performance class should bet 12.9.After the drawings was designed,the structure was manufactured and put into operation.It’s proved that the structure design is reliable after it has run for five years.This design method can be popularized and applied in the design of roller press.…”
Get full text

The American Landscape: from an Ideological to an Ecological Object in Oxbow Archive by Joel Sternfeld by Helena Lamouliatte

“…American photographer Joel Sternfeld (born 1944) published Oxbow Archive in 2008, a book comprising 77 photographs that were taken over the course of a year and a half, between July 2005 and March 2007, and depicting a place called the East Meadows, located on the East side of the Connecticut river bend. Sternfeld chose the very place that was represented in Thomas Cole’s famous View from Mount Holyoke, Northampton, Massachusetts, after a Thunderstorm—The Oxbow (1836). …”
Get full text

Floquet topological phase transitions in 2D Su–Schrieffer–Heeger model: interplay between time reversal symmetry breaking and dimerization by Adrian Pena, Bogdan Ostahie, Cristian Radu

“…In the absence of light irradiation, we identify a symmetry-protected degeneracy and prove the appearance of a flat band along a specific direction in the momentum space. …”
Get full text

Joint User Scheduling and MU-MIMO Hybrid Beamforming Algorithm for mmWave FDMA Massive MIMO System by Jing Jiang, Deting Kong

“…But for the hybrid beamforming system, the analog beamforming is implemented by the same phase shifts in the entire frequency band, and the wideband phase shifts may not be harmonious with all users scheduled in frequency resources. …”
Get full text

Production of Carbon Quantum Dots Based on Oil Palm Fronds for Polyethylene and Polyethylene Terephthalate Microplastics Detection by Nonni Soraya Sambudi, Maissy Graceline Mulia, Apriliana Cahya Khayrani, Isnaeni, Revathi Raviadaran, Farhana Aziz, Diva Dwira Permana, Randy Suwandi, Kenny Lischer

“…In this study, CQDs were produced with a peak of 291 nm in the UV wavelength range, which indicates the presence of a ?-?* absorption band in the carbon structure of CQDs. The emergence of dominant C=C, O-H and C=O groups in the FTIR test also proves the success of CQDs production through this hydrothermal method. …”
Get full text

Technology and Modeling of Nonclassical Transistor Devices by George V. Angelov, Dimitar N. Nikolov, Marin H. Hristov

“…Technology boosters such as high-k/metal-gate technologies, ultra-thin-body SOI, Ge-on-insulator (GOI), AIII–BV semiconductors, and band-engineered transistor (SiGe or Strained Si-channel) with high-carrier-mobility channels are examined. …”
Get full text

Research on Equivalent Method of Bench Fatigue Tests for Main Reducers by Zou Xihong, Zhou Qing, Yuan Dongmei, Xiao Yukai, Zhou Yuting, He Ping

“…By collecting the actual driving load spectrum of users and the test site, the road condition and road load spectrum of the test site are reconstructed by using rain-flow counting and elite strategy non-dominated sorting genetic algorithm. In order to verify the effectiveness of the equivalent method, the finite element model of the main reducer is established and the static strength analysis is carried out to verify the mesh independence and model validity. …”
Get full text

Achieving a Near-Infrared Absorption by A−DA’D−A Type Isoindigo-Based Small Molecular Acceptors for Organic Photovoltaics by Hui Liu, Yu Wu, Dong-Nai Ye, Na Chen, Xu-Min Huang, Shi-Yong Liu

“…Both URAs, despite the absence of non-covalent conformation locking between CPDT and IID, demonstrated favorable molecular planarity, broad absorption ranges, low band gaps, and high molar absorption coefficients. …”
Get full text

Nonlinear Numerical Modeling of the Wire-Ring Net for Flexible Barriers by Zhixiang Yu, Chun Liu, Liping Guo, Lei Zhao, Shichun Zhao

“…The linear correlation equations for the breaking loads of the one-ring specimens and the puncturing strength of wire-ring nets were established, both of which were related to the number of windings. The wire rings were modeled via an equivalent structure with a single winding and a circular cross section. …”
Get full text

The Performance of Resistance Progressive Collapse Analysis for High-Rise Frame-Shear Structure Based on OpenSees by Qiang Zhang, Yaozhuang Li

“…A finite element model (FEM) of frame-shear structure was constructed using OpenSees program based on the nonlinear flexibility theory and multi-vertical-line theory that considered bending-shear coupling, and its progressive collapse resistance under abnormal conditions was analyzed. …”
Get full text

Experimental investigation on the mechanical behavior� by Tidjani Messas, Djamel Achoura, Abdelaziz Boutrid, Belgacem Mamen

“…Compression and three-point bending tests have been performed on cubic and prismatic samples, respectively. …”
Get full text

Crack path for run-out specimens in fatigue tests: is it belonging to high- or very-high-cycle fatigue regime? by A. Shanyavskiy

“…Nevertheless, it is not clear what kind of fatigue cracking takes or will take place in these specimens. …”
Get full text

Atmospheric Sounding from Fengyun-3C GPS Radio Occultation Observations: First Results and Validation by Shuanggen Jin, Chao Gao, Junhai Li

“…It is found that the effect of the ionospheric correction residual on the phase delay is below 20 mm, which has minimal impact on bending angle estimation and generates differences of about 1 K in the average temperature profile. …”
Get full text

Microscopic and molecular detection of Cytauxzoon spp. in cats in Mosul city, Iraq by Sura S. Aghwan, Enas S. Hussein, Salam A Esmaeel

“…The results indicate that some of the tested samples contain DNA from the Cytauxzoon genus, based on the presence of bands at the expected 1600 bp size. The local genome sequence of Cytauxzoon felis Sesa LC775709.1 is highly similar to sequences found in geographically diverse regions such as Switzerland, Italy, France, and the USA. …”
Get full text

Compact phase shifter using arbitrary length of two coupled transmission lines by Tso‐Jung Chang, Krishna Pande, Ting‐Jui Huang, Heng‐Tung Hsu

“…Our data indicates that insertion loss, multi‐band operation, and miniaturisation are superior to any published data.…”
Get full text

The Impact of Hydrostatic Pressure on the Structural, Mechanical, Thermal, and Optoelectronic Characteristics of the RbV3Sb5 Kagome Compound: Ab initio Approach by Prianka Mondal, Md. Raihan Islam, Mst. Shamima Khanom, Farid Ahmed

“…The structure has no negative‐energy phonon branches under 10 GPa stress. From band structure and density of state analysis, the structure behaves metallically under hydrostatic pressure. …”
Get full text