نتایج جستجو برای: tunnel support
تعداد نتایج: 690999 فیلتر نتایج به سال:
Single loop fixation of posterior chamber intraocular lens in the presence of partial capsular support is usually performed by creation of additional scleral flap or tunnel. This extra port may expose the suture holding the intraocular lens or the tucked-in lens haptics to the outside environment thereby increasing the risk of endophthalmitis. We describe a technique of single loop fixation whe...
Dealing with engineering structures that are not easily replaceable requires frequent assessment of the damage state of the construction in order to estimate its durability and reliability. The procedures that allow damage to be detected and identified are broadly defined as Structural Health Monitoring (SHM). In this work, a SHM network has been deployed in a road tunnel that intersects a mass...
Development of a next generation airplane, which cruises near sonic speed, received considerable attention in 2002. To investigate aerodynamic characteristics and validity of CFD codes as a design tool in this new cruise condition, detailed wind tunnel test and CFD validation study was conducted in near sonic regime about the NEXST-1, unpowered supersonic experimental vehicle as a cooperative r...
background: as part of the process of developing a decision aid for carpal tunnel syndrome (cts) according to the ottawa decision support framework, we were interested in the level of ‘decisional conflict’ of hand surgeons and patients with cts. this study addresses the null hypothesis that there is no difference between surgeon and patient decisional conflict with respect to test and treatment...
During the past decade, the Navy has considerably improved its capabilities in aircraft/weapon integration. In 1989 it took more than 400 hours of wind tunnel testing, which cost 1,5000,000, and 20 flights to clear the JSOW from the F-18 to Mach 0.95. This year the MK-83 JDAM was cleared after only 60 hours of wind tunnel testing and five flights to the full F-18 aircraft envelope of Mach 1.3. ...
Erythromycin is a clinically useful antibiotic that binds to an rRNA pocket in the ribosomal exit tunnel. Commonly, resistance to erythromycin is acquired by alterations of rRNA nucleotides that interact with the drug. Mutations in the β hairpin of ribosomal protein uL22, which is rather distal to the erythromycin binding site, also generate resistance to the antibiotic. We have determined the ...
The long-term follow-up of six patients operated on for aorto-left ventricular communication has been reviewed in detail. All had residual aortic regurgitation after the initial repair of the defect. It was severe in four and required repeated reoperation in three with ultimate aortic valve replacement. The failure of early repair to solve the haemodynamic problem has provoked a reconsideration...
This study investigated the vault settlement characteristics of an unsymmetrically loaded tunnel which was excavated by annular excavation via core rock support method. Response surface methodology (RSM) was employed to design the experiments, evaluate the results with the purpose of optimizing the value of design parameters for reducing the vault settlement. The parameters such as horizontal d...
Taking as examples of South Gate tunnel project and Metro Line 2 crossing project in Xi’an, this paper analyses the dynamic response of motor vehicle and train loads acting on a tunnel structure .based on finite element model of three-dimensional dynamics. By comprehensive use of load numerical fixation method and analytic formula method, the vibrating load curves of motor vehicle and subway tr...
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