Results 31 to 40 of about 169 (124)
Journal of Paleontology, 2022 Antiarch placoderm fishes were an abundant component of the Middle Paleozoic vertebrate assemblages. Despite a large number of known taxa and specimens, the morphology and function of the skeletal elements of their jaws is inadequately known.
Isakhodzayev, Farkhad +5 more
core +2 more sources
Mathematical Problems in Engineering, 2018 A composite structure, including concrete antiarches and bolts, was designed to control the floor heave. This semiclosed structure may reinforce the floor and the two bottom corners of the roadway. Then, based on some relative assumptions, we established a model for this structure.
Wenxiang Zheng, Yanlin Zhao, Qingwei Bu
openaire +2 more sources
A new antiarch placoderm from the Emsian (Early Devonian) of Wuding, Yunnan, China
Alcheringa: An Australasian Journal of Palaeontology, 2017 Wufengshania magniforaminis, a new genus and species of the Euantiarcha (Placodermi: Antiarcha), is described from the late Emsian (Early Devonian) of Wuding, Yunnan, southwestern China.
Liantao Jia +7 more
core +2 more sources
, 2001 FIG. 15. — Bothriolepis traudscholdi Jaekel, 1927; A, head-shield PIN 330/113 in dorsal view; B, head-shield, anterior part of AMD, left ADL, AVL, CD1 and CV1 PIN 2917/45 in lateral view; C, head-shield, anterior part of AMD, both ADL, right AVL and ...
Lukševičs, Erwin
core +3 more sources
Structure and function of the pectoral joint and operculum in antiarchs, Devonian placoderm fishes
, 1992 Volume: 35Start Page: 443End Page ...
Young, Gavin C., Zhang, Guorui
core +3 more sources
Records of the Australian Museum, 1992 Volume: 44Start Page: 319End Page ...
Gavin C. Young +7 more
core +2 more sources
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 To improve the efficient and precise seeding of potatoes, a novel combination vacuum and spoon belt metering device was designed. The overall structure and working principle of vacuum and spoon belt metering devices were illustrated and analyzed.
Zhang Wanzhi +6 more
wiley +1 more source
Postfire Safety Investigation on Prestressed RPC Beams after Exposure to Elevated Temperatures
Advances in Materials Science and Engineering, Volume 2020, Issue 1, 2020., 2020 Since the postfire safety of prestressed RPC beams after exposure to elevated temperatures needs to be studied and proved, this paper prepares eight smart prestressed RPC beams with intelligent sensors built in to monitor the internal temperature, force, and strain. The residual bearing tests after fire are carried out. The failure process of the beams
Yan Kai +5 more
wiley +1 more source
Stability Mechanism and Repair Method of U‐Shaped Steel Reverse Arch Support in Soft Floor Roadway
Advances in Civil Engineering, Volume 2020, Issue 1, 2020., 2020 This paper is aimed at the inverted arch support instability of track roadway with mining level +1100 m in Liuyuanzi Coal Mine. By means of field investigation, theoretical analysis, numerical calculation, and engineering practice, the instability reasons of inverted arch structure are expounded, the mechanical mechanism of instability of inverted arch
Chao Wang +4 more
wiley +1 more source