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RISS 인기검색어
- 검색키워드
- 저자 : Bakhtiari M. (검색결과 3 건)
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Bakhtiari M.,Najar S. Shaikhzadeh,Etrati S. M.,Toosi Z. Khorram The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.3
High-bulk worsted yams with different shrinkable and non-shrinkable acrylic fibers blend ratios are produced and then single jersey weft knitted fabrics with three different structures and loop lengths are constructed. The physical properties of produced yams and compression properties of produced fabrics at eight pressure values (50, 100, 200, 500, 1000, 1500 and $2000 g/cm^2$) were measured using a conventional fabric thickness tester. Then, weft-knitted fabric compression behavior was analyzed using a two parameters model. It is found that at 40 % shrinkable fibre blending ratio the maximum yam bulk, shrinkage, abrasion resistance and minimum yarn strength are obtained. It is also shown that high-bulk acrylic yarn has the highest elongation at 20 % shrinkable fibre blend ratio. The statistical regression analysis revealed that the compression behavior of acrylic weft-knitted fabrics is highly closed to two parameter model proposed for woven fabrics. It is also shown that for weft-knitted structure, there is an incompressible layer (V') which resists against high compression load. Acrylic weft-knitted fabrics with knit-tuck structure exhibit higher compression rigidity and lower softness than the plain and knit-miss structures. In addition, at 20 % shrinkable fibre blend ratio, the high-bulk acrylic weft-knitted fabrics are highly compressible.
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Cross sections of proton-induced nuclear reactions on bismuth and lead up to 100 MeV
Mokhtari Oranj, L.,Jung, N. S.,Bakhtiari, M.,Lee, A.,Lee, H. S. American Physical Society 2017 Physical review. C Vol.95 No.4
<P>Production cross sections of Bi-209(p, xn)Po-207,Po-206,Po-205,Po-204,Po-203, Bi-209(p, pxn)Bi-207,Bi-206,Bi-205,Bi-204,Bi-203,Bi-202, and Pb-nat(p, xn)Bi-206,Bi-205,Bi-204,Bi-203,Bi-202,Bi-201 reactions weremeasured to fill the gap in the excitation functions up to 100 MeV as well as to figure out the effects of different nuclear properties on proton-induced reactions including heavy nuclei. The targets were arranged in two different stacks consisting ofBi, Pb, Al, Au foils and Pb plates. The proton beam intensity was determined by the activation analysis method using Al-27(p, 3pn)Na-24, Au-197(p, pn)Au-196, and Au-197(p, p3n)Au-194 monitor reactions in parallel as well as the Gafchromic film dosimetry method. The activities of produced radionuclei in the foils were measured by the HPGe spectroscopy system. Over 40 new cross sections were measured in the investigated energy range. A satisfactory agreement was observed between the present experimental data and the previously published data. Excitation functions of mentioned reactions were calculated by using the theoretical model based on the latest version of the TALYS code and compared to the new data as well as with other data in the literature. Additionally, the effects of various combinations of the nuclear input parameters of different level density models, optical model potentials, and gamma-ray strength functions were considered. It was concluded that if certain level density models are used, the calculated cross sections could be comparable to the measured data. Furthermore, the effects of optical model potential and gamma-ray strength functions were considerably lower than that of nuclear level densities.</P>
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Development of ITER-relevant plasma control solutions at DIII-D
Humphreys, D.A.,Ferron, J.R.,Bakhtiari, M.,Blair, J.A.,In, Y.,Jackson, G.L.,Jhang, H.,Johnson, R.D.,Kim, J.S.,LaHaye, R.J.,Leuer, J.A.,Penaflor, B.G.,Schuster, E.,Walker, M.L.,Wang, H.,Welander, A.S. International Atomic Energy Agency 2007 Nuclear fusion Vol.47 No.8
<P>The requirements of the DIII-D physics program have led to the development of many operational control results with direct relevance to ITER. These include new algorithms for robust and sustained stabilization of neoclassical tearing modes with electron cyclotron current drive, model-based controllers for stabilization of the resistive wall mode in the presence of ELMs, coupled linear–nonlinear algorithms to provide good dynamic axisymmetric control while avoiding coil current limits, and adaptation of the DIII-D plasma control system (PCS) to operate next-generation superconducting tokamaks. Development of integrated plasma control (IPC), a systematic approach to model-based design and controller verification, has enabled successful experimental application of high reliability control algorithms requiring a minimum of machine operations time for testing and tuning. The DIII-D PCS hardware and software and its versions adapted for other devices can be connected to IPC simulations to confirm control function prior to experimental use. This capability has been important in control system implementation for tokamaks under construction and is expected to be critical for ITER.</P>
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