Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Zhengxiang Lv"'
Publikováno v:
Minerals, Vol 14, Iss 9, p 899 (2024)
The West Lake Sag is abundant in oil and gas reserves, primarily in the Huagang Formation reservoir which serves as the primary source of production. The level of exploration is rather high, but there are still some unresolved issues, such as an uncl
Externí odkaz:
https://doaj.org/article/7ec8074c48164281b30fd61e7b1c576f
Publikováno v:
ACS Omega, Vol 6, Iss 42, Pp 28285-28296 (2021)
Externí odkaz:
https://doaj.org/article/ec09d2794acf4d20bfbe96712719d28b
Publikováno v:
IEEE Access, Vol 8, Pp 148500-148509 (2020)
Estimating reliable signal component and its derivatives from noisy feedback signal is important in control systems. Toward this problem, this article presents a new model-free variable gain sliding mode tracking differentiator for derivative estimat
Externí odkaz:
https://doaj.org/article/a37df7e9392a476d906c45b34a8cff40
Publikováno v:
IEEE Access, Vol 8, Pp 41175-41185 (2020)
Noise reduction is one of the important issues for feedback control systems. Toward this problem, this paper proposes a new sliding mode filter, which is an improvement of Lv et al. ’s parabolic sliding mode filter. The proposed filter employs a fi
Externí odkaz:
https://doaj.org/article/21cde16a60b74b90b50aef5d1a15d93b
Autor:
Xiuzhang Song, Zhengxiang Lv, Chunyan Zang, Peng Hao, Yinjun He, Wei Zhao, Yuanhua Qing, Jie Ren
Publikováno v:
Minerals, Vol 13, Iss 1, p 80 (2023)
Exploring for hydrocarbons in a pyroclastic-affected reservoir is an important research topic. Previous studies have mainly focused on laminated pyroclastic. A large number of dispersed pyroclastic is present in sedimentary rocks, and dispersed volca
Externí odkaz:
https://doaj.org/article/809336fa9a8b40f9a1008563eea44243
Autor:
Maolin Wang, Yuanhua Qing, Zheyuan Liao, Yuefeng Li, Sheng Li, Zhengxiang Lv, Shijun Ni, Jin Fang, Song Tang, Yawen Yang
Publikováno v:
Water, Vol 14, Iss 23, p 3915 (2022)
The paleosedimentary environment and paleoclimate of the Neogene Guantao Formation in the Liaodong sub-uplift of Bohai Bay Basin in China, which is an important oil and gas exploration horizon, are not clear owing to the lack of quantitative analysis
Externí odkaz:
https://doaj.org/article/56b9e4b57e7c4da795dcf32530e3d550
Publikováno v:
IEEE Access, Vol 7, Pp 130236-130245 (2019)
This paper presents a new quick-response sliding mode tracking differentiator (new TD) for feedback control of mechatronic systems. The new TD is an extension of Jin et al.’s sliding mode tracking differentiator (TD-J) by employing an exponential r
Externí odkaz:
https://doaj.org/article/b4c58ec0017c41c4bffb98b49260bd3f
Autor:
Yong Tang, Zhengxiang Lv, Wenjun He, Yuanhua Qing, Xiuzhang Song, Qinming Cao, Yongxin Qian, Tao Zhu, Na Li, Xiang Li
Publikováno v:
Minerals, Vol 12, Iss 8, p 979 (2022)
Through optical microscopic examination, scanning electron microscope analysis, whole rock X-ray diffraction analysis, X-ray fluorescence spectrum analysis, carbon and oxygen isotope analysis, and temperature measurement of fluid inclusions, the char
Externí odkaz:
https://doaj.org/article/d2490d25a3ee4ceb8d48ef8a775bc8af
Publikováno v:
Journal of Natural Gas Geoscience, Vol 3, Iss 5, Pp 243-252 (2018)
The distribution of high-quality reservoirs in Shahejie Formation of the Shijiutuo Uplift, Central Bohai Sea, is the key factor to determine the oil and gas accumulation. Likewise, diagenesis is the key factor to control the development of lacustrine
Externí odkaz:
https://doaj.org/article/f7c66cfa10ac43eb965044e4baf6612c
Publikováno v:
Water, Vol 13, Iss 14, p 1890 (2021)
High-precision in situ δ18O values obtained using secondary ion mass spectrometry (SIMS) for μm-size quartz cement are applied to constrain the origin of the silica in the deep-buried Upper Triassic second member of Xujiahe Formation tight sandston
Externí odkaz:
https://doaj.org/article/3e5c32ffe627451ea7316ce1453382ea