Zobrazeno 1 - 10
of 2 212
pro vyhledávání: '"Zhu Xiaohua"'
Publikováno v:
矿业科学学报, Vol 8, Iss 5, Pp 642-653 (2023)
High-voltage electric pulse(HVEP)drilling has become a new and efficient rock breaking method, which is also the research focus in the field of drilling speed increase. To probe into rock breaking mechanism of high voltage electric pulse, this study
Externí odkaz:
https://doaj.org/article/9139efa5e5b14d1496b1716b3285e996
Publikováno v:
Xibei Gongye Daxue Xuebao, Vol 40, Iss 1, Pp 125-133 (2022)
Aiming at the waveform of missile borne radar is simple and easy to be affected by the repeater jamming in the terminal guidance, an anti-jamming waveform optimization algorithm based on the frequency shift keying(FSK) and phase shift keying(PSK) com
Externí odkaz:
https://doaj.org/article/d5a2a424250f41fd99d56e9f52789608
Publikováno v:
Petroleum, Vol 6, Iss 3, Pp 226-233 (2020)
Intelligent well technology is an oil and gas well optimization completion technology integrated with underground real-time monitoring, data analysis decision-making and remote control of downhole tools. It's of great significance to the transformati
Externí odkaz:
https://doaj.org/article/9fa1f7fe137d4ab7b088b5445a2dcea4
Autor:
Zhao, Ziyi, Zhu, Xiaohua
By Perelman's $\mathcal L$-geodesic theory, we study the blow-down solutions on a noncompact $\kappa$-noncollapsed steady gradient Ricci soliton $(M^n, g)$ $(n\ge 4)$ with nonnegative curvature operator and positive Ricci curvature away from a compac
Externí odkaz:
http://arxiv.org/abs/2404.18494
Autor:
Qin Fang, Dong Liangliang, Tang Shiguo, Lei Qinglong, Zhu Qing, Yang Mei, Zhu Xiaohua, Hong Yukui
Publikováno v:
Advances in Mechanical Engineering, Vol 12 (2020)
Sediments frequently appear at the bottom of oil and gas wells in the bottom of carbonate rocks during completion or production, seriously affecting the productivity. In order to solve the wellbore cleaning problem, this article applies the Bernoulli
Externí odkaz:
https://doaj.org/article/7cf58af44e084164b9fed91e7aa807ba
Autor:
Zhao, Ziyi, Zhu, Xiaohua
Let $(M^n,g)$ $(n\ge 4)$ be a complete noncompact $\kappa$-noncollapsed steady Ricci soliton with $\rm{Rm}\geq 0$ and $\rm{Ric}> 0$ away from a compact set $K$ of $M$. We prove that there is no any $(n-1)$-dimensional compact split limit Ricci flow o
Externí odkaz:
http://arxiv.org/abs/2402.00316
Autor:
Zhao, Ziyi, Zhu, Xiaohua
In the paper, we analysis the asymptotic behavior of noncompact $\kappa$-noncollapsed steady gradient Ricci soliton $(M, g)$ with nonnegative curvature operator away from a compact set $K$ of $M$. In particular, we prove: any $4d$ noncompact $\kappa$
Externí odkaz:
http://arxiv.org/abs/2310.12529
Autor:
Wang, Feng, Zhu, Xiaohua
We prove that the Gromov-Hausdorff limit of K\"ahler-Ricci flow on a $\mathbf G$-spherical Fano manifold $X$ is a $\mathbf G$-spherical $\mathbb Q$-Fano variety $X_{\infty}$, which admits a (singular) K\"ahler-Ricci soliton. Moreover, the $\mathbf G$
Externí odkaz:
http://arxiv.org/abs/2305.05366
Publikováno v:
MATEC Web of Conferences, Vol 208, p 02003 (2018)
In this paper, we consider unimodular waveform optimization for MIMO radar transmit beamforming with prior information on the directions of target and interferences. A phase-only conjugate gradient method is presented to optimize the unimodular wavef
Externí odkaz:
https://doaj.org/article/8b6bd9b865844bb683a7d24ffaa9db6e
Autor:
Zhao, Ziyi, Zhu, Xiaohua
We introduce a new curvature-pinching condition, which is weaker than the positive sectional curvature or PIC1, and then we prove several rigidity results for the rotationally symmetric solutions of steady Ricci solitons, i.e., the Bryant Ricci solit
Externí odkaz:
http://arxiv.org/abs/2212.02889