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Application of endoscopic techniques in orbital blowout fractures

Shu Zhang, Yinwei Li, Xianqun Fan

Frontiers of Medicine 2013, Volume 7, Issue 3, Pages 328-332 doi: 10.1007/s11684-013-0271-5

Abstract: Endoscopic techniques have been gradually applied in orbital surgery through the sinus inferomedial tothe orbit and the orbital subperiosteal space.Endoscopic techniques help surgeons observe fractures and soft tissue of the posterior orbit to preciselyWe reviewed the development of endoscopic techniques, the composition of endoscopic systems for orbitalsurgery, and the problems and developmental prospects of endoscopic techniques for simple orbital wall

Keywords： orbital fractures endoscope restoration surgery

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The effect of orbital radiation therapy on thyroid-associated orbitopathy complicated with dysthyroid

Yang Wang, Huifang Zhou, Xianqun Fan

Frontiers of Medicine 2017, Volume 11, Issue 3, Pages 359-364 doi: 10.1007/s11684-017-0528-5

Abstract: optic neuropathy (DON), which can lead to permanent vision loss because of volume expansion in the orbitalOrbital radiation therapy (ORT) is an anti-inflammatory treatment used in the treatment of active TAO

Keywords： thyroid-associated orbitopathy dysthyroid optic neuropathy orbital radiation therapy

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Hydromechanical model for hydraulic fractures using XFEM

Bo HE

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 240-249 doi: 10.1007/s11709-018-0490-6

Abstract: In this study, a hydromechanical model for fluid flow in fractured porous media is presented. We assume viscous fluids and the coupling equations are derived from the mass and momentum balance equations for saturated porous media. The fluid flow through discrete cracks will be modelled by the extended finite element method and an implicit time integration scheme. We also present a consistent linearization of the underlying non-linear discrete equations. They are solved by the Newton-Raphson iteration procedure in combination with a line search. Furthermore, the model is extended to includes crack propagation. Finally, examples are presented to demonstrate the versatility and efficiency of this two-scale hydromechanical model. The results suggest that the presence of the fracture in a deforming, porous media has great impact on the fluid flow and deformation patterns.

Keywords： multi-phase medium porous fracture multi-scale method

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Classification and treatment of orbital venous malformations: an updated review

Tianyuan Li, Renbing Jia, Xianqun Fan

Frontiers of Medicine 2019, Volume 13, Issue 5, Pages 547-555 doi: 10.1007/s11684-018-0623-2

Abstract: Orbital venous malformation (OVM) is a congenital vascular disease.Classification of orbital vascular malformations, especially OVMs, is carried out on the basis of different

Keywords： orbit venous malformation treatment sclerotherapy laser embolization

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Multi-feed multi-mode metasurface for independent orbital angular momentum communication in dual polarization Research Article

Lingjun YANG, Sheng SUN, Wei E.I. SHA, Long LI, Jun HU,sunsheng@ieee.org

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 12, Pages 1776-1790 doi: 10.1631/FITEE.2200471

Abstract: The wavefront control of spin or is widely applied in the optical and radio fields. However, most passive metasurfaces provide limited manipulations, such as the spin-locked wavefront, a static OAM combination, or an uncontrollable OAM energy distribution. We propose a reflection-type to independently generate multi-mode OAM beams with dynamically switchable OAM combinations and spin states, while simultaneously, the energy distribution of carrying OAM modes is controllable. Specifically, four elements are proposed to overcome the spin-locked phase limitation by combining propagation and s. The robustness of these elements is analyzed. By involving the amplitude term and multi-feed technology in the design process, the proposed metasurface can generate OAM beams with a controllable energy distribution over modes and switchable mode combinations. OAM-based radio communication with four independent channels is experimentally demonstrated at 14 GHz by employing a pair of the proposed metasurfaces. The powers of different channels are adjustable by the provided amplitude term, and the maximum crosstalk is -9 dB, proving the effectiveness and practicability of the proposed method.

Keywords： Orbital angular momentum (OAM) Geometric phase Multi-feed metasurface Spin-decoupled metasurface

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Modulational Instability of Optical Vortices in Engineered Saturable Media Review

D.G. Pires, N.M. Litchinitser

Engineering 2022, Volume 17, Issue 10, Pages 31-43 doi: 10.1016/j.eng.2022.04.022

Abstract: many degrees of freedom that are still largely unexplored, such as spin angular momentum (SAM) and orbital

Keywords： Optical vortex Orbital angular momentum Modulation instability Turbid media

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The Study of Fractures and Their Development Countermeasures on Taizhao Low-permeability Reservoir in

Zeng Lianbo,Liu Hongtao,Fang Baocai,Deng Haicheng

Strategic Study of CAE 2004, Volume 6, Issue 11, Pages 73-79

Abstract: in Taizhao area is the typical low-permeability reservoir which developed EW, SN, NW and NE tectonic fracturesThe development degree of above four group fractures in succession die down.are the best, then are NW and NE fractures, and that of SN fractures are the worst.The development degree of fractures are controlled by lithology, thickness, fault and tectonic stressThe artificial fractures are controlled by the modern stress field and natural fractures in fractured

Keywords： fracture low-permeability reservoir development countermeasure

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Advances in the technology of explosion in fracturesused in low permeability reservoirs

Li Decong,Chen Li,Lin Yingsong, Ding Yansheng

Strategic Study of CAE 2010, Volume 12, Issue 9, Pages 52-57

Abstract:

In this paper,the technical idea and the possible applications of this method were briefly introduced. Meanwhile, some related key technical problems were also particularly discussed. A series of research and corresponding advances achieved in recent years were reported in detail. In the end, some suggestion was made for further research.

Keywords： low permeability reservoirs mechanics of explosion explosion in fractures security simulation experiment

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The Pressure Sensitivity of Fractures and Its Development Significance for Extra Low-permeability Sandstone

Zeng Lianbo,Shi Chengen,Wang Yongkang,Li Shuheng,Wan Xiaolong,Cui Panfeng

Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 35-38

Abstract:

In order to analyse the pressure sensitivity feature of high-dip fractures The experiment results indicate quite obvious pressure sensitivity feature of fractures in the The matrix sample without fracture has medium pressure sensitivity and the samples with fractures The pressure sensitivity of fractures is of great significance to the development of the extra

Keywords： fracture pressure sensitivity extra low-permeability sandstone reservoir Ordos basin