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Application of endoscopic techniques in orbital blowout fractures

null

《医学前沿（英文）》 2013年第7卷第3期页码 328-332 doi: 10.1007/s11684-013-0271-5

摘要：

Minimally invasive surgical techniques, particularly endoscopic techniques, have revolutionized otolaryngeal surgery. Endoscopic techniques have been gradually applied in orbital surgery through the sinus inferomedial to the orbit and the orbital subperiosteal space. Endoscopic techniques help surgeons observe fractures and soft tissue of the posterior orbit to precisely place implants and protect vital structures through accurate, safe, and minimally invasive approaches. We reviewed the development of endoscopic techniques, the composition of endoscopic systems for orbital surgery, and the problems and developmental prospects of endoscopic techniques for simple orbital wall fracture repair.

关键词： orbital fractures endoscope restoration surgery

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

null

《医学前沿（英文）》 2017年第11卷第3期页码 359-364 doi: 10.1007/s11684-017-0528-5

摘要：

Thyroid-associated orbitopathy (TAO) is an inflammatory autoimmune disorder. The most serious complication of TAO is dysthyroid optic neuropathy (DON), which can lead to permanent vision loss because of volume expansion in the orbital apex. Orbital radiation therapy (ORT) is an anti-inflammatory treatment used in the treatment of active TAO. Clinical studies support radiotherapy as having a modest effect on DON, and early radiotherapy may protect against disease progression to DON. Current studies suggest that radiotherapy is generally safe. However, risks still exist in some cases. The possible effects of radiotherapy on TAO, especially complicated with DON, are reviewed. The effects of radiotherapy on DON are not completely known, and evidence from standardized, prospective, and multicenter clinical trials is still lacking.

关键词： thyroid-associated orbitopathy dysthyroid optic neuropathy orbital radiation therapy

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Hydromechanical model for hydraulic fractures using XFEM

Bo HE

《结构与土木工程前沿（英文）》 2019年第13卷第1期页码 240-249 doi: 10.1007/s11709-018-0490-6

摘要： 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.

关键词： 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

《医学前沿（英文）》 2019年第13卷第5期页码 547-555 doi: 10.1007/s11684-018-0623-2

摘要： Orbital venous malformation (OVM) is a congenital vascular disease. As a common type of vascular malformation in the orbit, OVM may result in vision deterioration and cosmetic defect. Classification of orbital vascular malformations, especially OVMs, is carried out on the basis of different categories, such as angiogenesis, hemodynamics, and locations. Management of OVM is complicated and challenging. Treatment approaches include sclerotherapy, laser therapy, embolization, surgical resection, and radiotherapy. A satisfactory outcome can be achieved only by selecting the appropriate treatment according to lesion characteristics and following the sequential multi-method treatment strategy. This article summarizes the current classification and treatment advances in OVM.

关键词： orbit venous malformation treatment sclerotherapy laser embolization

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工程饱和介质中漩涡光的调制不稳定性 Review

D.G. Pires, N.M. Litchinitser

《工程（英文）》 2022年第17卷第10期页码 31-43 doi: 10.1016/j.eng.2022.04.022

摘要：

光束在水下环境、雾、云或生物组织等混浊介质中的传播在科学和技术中有着越来越重要的应用，包括生物成像、水下和自由空间通信技术。虽然这些应用在传统上依赖于常规的线性偏振高斯光束，但光具有许多未被发掘的自由度，如自旋角动量（SAM）和轨道角动量（OAM）。本文提出了具有“旋转”自由度的复杂光束在工程化非线性胶体介质中的非线性光-物质相互作用。利用变分法和摄动法，我们考虑了非圆柱光学涡旋、椭圆光学涡旋和高阶贝塞尔光束在时间上的积分（HOBBIT），来预测这些光束演化的动力学行为和稳定性。这些结果可应用于许多强散射环境下涉及光透射的情况。

关键词： Optical vortex Orbital angular momentum Modulation instability Turbid media

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大庆油田台肇地区低渗透储层裂缝及其开发对策研究

曾联波,刘洪涛,房宝才,邓海成

《中国工程科学》 2004年第6卷第11期页码 73-79

摘要：

介绍了大庆油田外围典型的低渗透储层——台肇地区葡萄花油层中东西向、南北向、北西向和北东向4组高角度构造裂缝，其发育程度依次由强变弱。受现今地应力影响，近东西向裂缝连通性好，地下张开度和渗透率大，是该区主渗流方向；其次是北西向、北东向裂缝，近南北向裂缝渗透性较差，裂缝发育程度受岩性、层厚、断层、构造应力等因素影响。根据地质条件和油藏数值模拟，认为该区适应于用矩形井网和菱形井网开发，效果比反九点和五点井网好。低渗储层由于裂缝发育，降低了地层破裂压力，注入压力容易超过地层破裂压力，使注入水沿裂缝快速流动，引起水淹水窜，影响水驱效果，在油田注水开发中，应控制注水压力。人工裂缝的分布受现今地应力和天然裂缝控制、转为线性注水、开展动态调配水与脉冲式周期注水、进行注采系统和井网加密调整、选择压裂井与控制压裂规模等开发调整对策。

关键词：裂缝低渗透储层开发对策

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低渗透油田层内爆炸增产技术研究进展

李德聪,陈力,林英松,丁雁生

《中国工程科学》 2010年第12卷第9期页码 52-57

摘要：

系统介绍了层内爆炸增产技术的技术思路、应用前景以及实现该技术所涉及到的一系列关键性技术问题；详细介绍了近年来针对此项技术所开展的一系列研究工作，报告了取得的一些研究成果，并对今后的主要研究工作做了展望。

关键词：低渗透油田爆炸力学层内爆炸安全性模拟试验力学模型

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鄂尔多斯盆地特低渗透砂岩储层裂缝压力敏感性及其开发意义

曾联波,史成恩,王永康,李书恒,万晓龙,崔攀峰

《中国工程科学》 2007年第9卷第11期页码 35-38

摘要：

为了分析特低渗透砂岩储层高角度裂缝的压力敏感性特征，对鄂尔多斯盆地陇东地区延长组特低渗透砂岩储层基质岩样、含天然裂缝岩样和含人造裂缝岩样进行了对比实验。实验结果表明，特低渗透砂岩储层裂缝的压力敏感性十分明显,在无裂缝时基质岩块为中等程度敏感性，含裂缝时为强压力敏感性。裂缝的开度越大，渗透率越高，其压力敏感性越强，裂缝渗透率的恢复程度越小。裂缝的压力敏感性特征对特低渗透砂岩油藏开发具有十分重要的意义。

关键词：裂缝压力敏感性开发意义特低渗透砂岩储层鄂尔多斯盆地