Results 31 to 40 of about 3,944,713 (309)
Effect of the Geometric Configuration of the Disc Cutter on the Cutting Behaviour in Tunneling
Applied Sciences, 2022 The disc cutter is a key tool in shield machines that come into direct contact with rock while participating in the removal of rock. Therefore, the reasonable design of the geometric configuration of disc cutters greatly determines the tunnelling ...
Yixin Duan +5 more
doaj +1 more source
A CONTACT INVARIANT IN SUTURED MONOPOLE HOMOLOGY
Forum of Mathematics, Sigma, 2016 We define an invariant of contact 3-manifolds with convex boundary using Kronheimer and Mrowka’s sutured monopole Floer homology theory ( $SHM$ ).
JOHN A. BALDWIN, STEVEN SIVEK
doaj +1 more source
Triangle-Free Planar Graphs and Segment Intersection Graphs
Journal of Graph Algorithms and Applications, 2002 We prove that every triangle-free planar graph is the intersection graph of a set of segments in the plane. Moreover, the segments can be chosen in only three directions (horizontal, vertical and oblique) and in such a way that no two segments cross, i.e.
Natalia de Castro +4 more
doaj +1 more source
Condition analysis of a multicopter carried with passive skid for rough terrain landing
ROBOMECH Journal, 2021 This paper describes the condition analysis of a multicopter carried with a proposed device for rough terrain landing. Based on a multicopter carried with an electrical robot arm for grasping, we proposed a method to determine whether the skid-carried ...
Maozheng Xu, Taku Senoo, Takeshi Takaki
doaj +1 more source
Discussion on application of piece-wise linear weight functions in 2D contact problems
Computer Assisted Methods in Engineering and Science, 2023 Standard higher order finite elements often perform unsatisfactory in contact problems. The major difficulties are caused by uneven distribution of nodal forces resulting in oscillating contact pressures.
Marek Klisiński +2 more
doaj
Study of Break-In Process and its Effects on Piston Skirt Lubrication in Internal Combustion Engines
Lubricants, 2019 The piston skirt is one of the main contributors to the total mechanical loss in internal combustion engines. Usually, the skirt friction experiences a rapid change during the break-in period largely due to the wear of the machine marks or roughness ...
Zhen Meng, Linfeng Zhang, Tian Tian
doaj +1 more source
Poncelet Porisms and Loci of Centers in the Isotropic Plane
MathematicsAny triangle in an isotropic plane has a circumcircle u and incircle i. It turns out that there are infinitely many triangles with the same circumcircle u and incircle i. This one-parameter family of triangles is called a poristic system of triangles. We
Ema Jurkin
doaj +1 more source
Yantu gongcheng xuebao, 2023 The mathematical programming approach of elastoplastic incremental analysis is one of the effective ways to analyze deformation and strength problems in geotechnical engineering and has unique advantages in dealing with the complex problems such as non ...
LIU Fengtao 1, ZHOU Xiwen 2, ZHANG Chengbo 2, DAI Beibing 3, MO Hongyan 1
doaj +1 more source
Underground main pipeline behaviour under a travelling impulse in the form of a triangle
E3S Web of Conferences, 2021 The article presents an analysis of the dynamic response of an underground main pipeline under the action of a longitudinal wave, propagating in soil along the pipe. It is assumed that the elastic pipe has a finite length.
B. Rakhmankulova +3 more
semanticscholar +1 more source