Results 51 to 60 of about 29,239 (203)
Journal of Field Robotics, EarlyView.ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand +3 more
wiley +1 more source
, 2014 The aim of the research was to improve the fundamental understanding of mechanical behaviour of ballast and study the effect of tamping on ballast. The experiments were carried out on scaled railway ballast to eliminate the difficulties associated with ...
Aingaran, S.
core +1 more source
Experimental study on influences of scale effect on mechanical properties of railway ballast
Yantu gongcheng xuebao, 2018 For the purpose of studying the effects of particle size distribution (PSD) and scale effect on strength and deformation characteristics of the ballast, a series of triaxial shear tests based on 1/4 scaled ballast as well as full ballast are carried out ...
YAO Xin-kai , BIAN Jiang , WANG Xu-dong
doaj +1 more source
River Research and Applications, EarlyView.ABSTRACT In France, it is estimated that shads (Alosa spp.) have lost 69% of their historical range, mainly due to disrupted river connectivity. After an absence of one century, signs of their return in the Seine River have been recorded over the past two decades: adult and juvenile specimens have been caught by anglers or recorded at video‐counting ...
Céline Le Pichon +5 more
wiley +1 more source
Ballast particle behavior under varying conditions using tri-axial inertial sensors
, 2021 Zarembski, Allan M.Maintaining ballast condition is an important aspect of maintaining a healthy track infrastructure system. Cyclic train loading over sections of track naturally degrades the ballast which must maintain a proper layer thickness and ...
Palese, Michael E.
core +1 more source
Journal of Traffic and Transportation Engineering (English ed. Online)Railway ballast is easily contaminated by different fouling material and the fouled ballast always causes the deterioration of railway track. Many previous studies focused on the effect of a certain kind of fouling material on ballast performance, but ...
Xu Zhang +4 more
doaj +1 more source
Applied Rheology, 2015 An elasto-visco-plastic model of the Cauchy stress is proposed for gluing solution of railway ballast, with an asymptotic timedependent viscosity accounting for the anti-thixotropic and shear-thickening features.
Fang Chung +4 more
doaj +1 more source
Analysis of mesoscopic mechanical dynamic characteristics of ballast bed with under sleeper pads
Railway Engineering Science, 2023 The meso-dynamical behaviour of a high-speed rail ballast bed with under sleeper pads (USPs) was studied. The geometrically irregular refined discrete element model of the ballast particles was constructed using 3D scanning techniques, and the 3D dynamic
Xiong Yang +5 more
doaj +1 more source
steel research international, EarlyView.Hydrochar‐mill‐scale briquettes with varying C/O molar ratios (0.07–0.90) have been tested at 1650 °C to evaluate their slag foaming performance for electric arc furnace application. All seven briquette recipes developed succeed in promoting slag foaming.
Yu‐Chiao Lu +3 more
wiley +1 more source
Preview of Ballast Water Treatment System Market Status
Naše More (Dubrovnik), 2017 The International Convention for the Control and Management of Ships’ Ballast Water and Sediments was adopted in February 2004 and it was ratified by a sufficient number of countries in September 2016.
Nermin Hasanspahić, Damir Zec
doaj +1 more source