نتایج جستجو برای: beam spring method
تعداد نتایج: 1769401 فیلتر نتایج به سال:
laser is one of the sources that induce a biological effect in higher plants. the positive effect of laser on some crops has been proved. this research was carried out to study the effect of laser radiation on the accumulation of proline in spring wheat (triticum aestivum cv. kavir) under different nacl treatment levels. semi-coherent red beam, infrared beam and one-second harmonics of neodymiu...
The SPring-8 storage ring is a third generation X-ray source providing brilliant photon beams. Continuous performance improvement realizes small horizontal and vertical beam sizes reaching to respectively 280μm and 4μm in rms at the source point of each standard insertion device (ID) [1]. Especially in a vertical plane, small orbit variation enlarges the vertical beam size and an orbit drift al...
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It was purposed to understand the dynamic response of frame which are subjected to moving point loads. The finite element method and numerical time integration method (New mark method) are employed in the vibration analysis. The effect of the speed of the moving load on the dynamic magnification factor which is defined as the ratio of the maximum dynamic displacement at the corresponding node i...
Recently, researchers' demands for high-quality data collection from protein micro-crystals, which would usually result from crystallization difficulty, have been remarkably growing. In order to collect efficient diffraction data for structure determination from micro-crystals, an expert data collection system providing high signal-to-noise ratio should be essential. A small sized and highly br...
Top-up operation allows SPring-8 to provide highly stable X-ray beams with arbitrary filling patterns. The implementation of top-up operation is described, with a focus on the simultaneous achievement of stability of stored current, beam orbit, purity of an isolated single bunch, and beam injection efficiency. Stored-current fluctuations have been routinely reduced to a level of 10(-3). Stored-...
The control system based on the standard model of the UNIX and VMEbus system has successfully performed accelerator operation with 8GeV electron beams. The software architecture of the control system designed with the client/server scheme has well operated over the distributed computing environment with the FDDI opticalfiber network. The relational database system has been widely used for machi...
1. Abstract This paper concerns with the identification of multiple cracks in a beam by measurements of the damage-induced variations in the static deflection of the beam under a prescribed load condition. Each crack is simulated by an equivalent linear elastic rotational spring connecting the two adjacent segments of the beam. Sufficient conditions on the static measurements which allow for th...
in this paper, nonlinear vibration and instability response of an embedded pipe conveying viscose fluid is investigated. the pipe is considered as a timoshenko beam embedded on an elastic foundation which is simulated by spring constant of the winkler-model and the shear constant of the pasternak-model. the external flow force, acting on the beam in the direction of the flexural displacement is...
We have been developing an electron beam halo monitor as an interlock device for protection of undulator permanent magnets against radiation damage. When permanent magnets are irradiated with a halo part of 8GeV electron beam, magnetic fields undulators are degraded permanently and laser oscillation is weakened. Therefore, the interlock device is required during machine operation. Diamond detec...
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