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排序方式: 共有138条查询结果,搜索用时 9 毫秒
61.
Filiz Gurtuna Cosmin Petra Florian A. Potra Olena Shevchenko Adrian Vancea 《Computational Optimization and Applications》2011,48(3):453-485
We present a new corrector-predictor method for solving sufficient linear complementarity problems for which a sufficiently centered feasible starting point is available. In contrast with its predictor-corrector counterpart proposed by Miao, the method does not depend on the handicap κ of the problem. The method has \(O((1+\kappa)\sqrt{n}L)\)-iteration complexity, the same as Miao’s method, but our error estimates are sightly better. The algorithm is quadratically convergent for problems having a strictly complementary solution. We also present a family of infeasible higher order corrector-predictor methods that are superlinearly convergent even in the absence of strict complementarity. The algorithms of this class are globally convergent for general positive starting points. They have \(O((1+\kappa)\sqrt{n}L)\)-iteration complexity for feasible, or “almost feasible”, starting points and O((1+κ)2 nL)-iteration complexity for “sufficiently large” infeasible starting points. 相似文献
62.
Polyacrylamide (PAAm)–sodium alginate (SA) composite was prepared with different amounts of SA varying in the range between 0.06% and 2% (w/v). The PAAm–SA composite was characterized by the steady-state fluorescence technique. Pyranine was added as a fluoroprobe for monitoring the polymerization. It was observed that pyranine molecules bind to AAm and SA chains upon the initiation of the polymerization. Thus, the fluorescence spectra of the bonded pyranines shift to the shorter wavelengths. Fluorescence spectra from the bonded pyranines allowed us to monitor the sol–gel phase transition, and to test the universality of the sol–gel transition as a function of SA contents. Observations around the critical point show that the gel fraction exponent, β, and the weight average degree of polymerization exponent, γ, agreed with the percolation result for (<0.25% (w/v)) SA contents. However, classical results were produced at (<2% (w/v)) SA contents. 相似文献
63.
64.
Natural convection heat transfer in an inclined fin attached square enclosure is studied both experimentally and numerically.
Bottom wall of enclosure has higher temperature than that of top wall while vertical walls are adiabatic. Inclined fin has
also adiabatic boundary conditions. Numerical solutions have been done by writing a computer code in Fortran platform and
results are compared with Fluent commercial code and experimental method. Governing parameters are Rayleigh numbers (8.105 ≤ Ra ≤ 4 × 106) and inclination angle (30° ≤ and ≤ 120°). The temperature measurements are done by using thermocouples distributed uniformly
at the wall of the enclosure. Remarkably good agreement is obtained between the predicted results and experimental data. A
correlation is also developed including all effective parameters on heat transfer and fluid flow. It was observed that heat
transfer can be controlled by attaching an inclined fin onto wall. 相似文献
65.
Filiz Ta?can 《Applied mathematics and computation》2009,215(8):3134-3139
In this paper, we establish exact solutions for (2 + 1)-dimensional nonlinear evolution equations. The sine-cosine method is used to construct exact periodic and soliton solutions of (2 + 1)-dimensional nonlinear evolution equations. Many new families of exact traveling wave solutions of the (2 + 1)-dimensional Boussinesq, breaking soliton and BKP equations are successfully obtained. These solutions may be important of significance for the explanation of some practical physical problems. It is shown that the sine-cosine method provides a powerful mathematical tool for solving a great many nonlinear partial differential equations in mathematical physics. 相似文献
66.
Filiz Ertu?ral Ekber Guliyev Ali Kuliev Zemine Yildirim 《Central European Journal of Physics》2009,7(4):731-737
In this study, the result of calculations using rotational, translational and Galilean invariant quasiparticle random-phase
approximation is presented for the low-lying dipole excitations in the even-even 160Gd nucleus. Calculations are carried out for both ΔK=1 and ΔK=0 branches. The analysis shows that the main part of spin-1 states, observed at energy 2.4–4 MeV in 160Gd, have M1 character and are interpreted as main fragments of the scissors mode. The calculations indicate the presence of
a few prominent negativeparity dipole ΔK=1 states in the investigated energy region, in agreement with experiment.
相似文献
67.
The need for routine and immediate healthcare monitoring has inspired “near-patient testing” or in other words “point-of-care testing (POCT)”. Therefore, POCT can be defined as laboratory tests that are performed at the patient's bedside or in the immediate vicinity of the incident. Among many POCTs, nucleic acid-based testing has attracted enormous attention for the diagnosis of important genetic, inherited and infectious diseases such as cancer and coronavirus. In this review, we outline the integration of nucleic acids into the remarkable electrochemical point-of-care diagnostics including microfluidic, paper and smartphone-based approaches, CRISPR/Cas and liquid biopsy related systems and DNA damage monitoring. 相似文献
68.
Synthesis of chalcone‐containing methacrylate‐based hydrogen bonded side chain liquid crystalline polymer and its dielectric properties
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Burak Korkmaz Yesim Hepuzer Gursel Nimet Yilmaz Canli Zeynep Güven Özdemir Mustafa Okutan Bahire Filiz Senkal 《先进技术聚合物》2017,28(11):1351-1356
In this work, a new methacrylate‐based hydrogen bonded side chain liquid crystalline polymer having chalcone moieties (HBCP) was prepared from poly(4‐(3‐(pyridin‐4‐yl)acryloyl) phenyl methacrylate) and 11‐(4‐cyanobiphenyl‐4(‐oxy) undekan‐1‐ol (LC11)) by molecular self‐assembly processes via hydrogen bond formation between nitrogen of the HBCP and hydroxyl group of the LC11. The formation of H bond was confirmed by using Fourier transform infrared (FTIR) spectroscopy. The phase transition temperatures and liquid crystalline phases of the HBCP were examined by DSC and POM measurements. The dielectric properties of HBCP have been determined by impedance analyzer within the frequency interval of 100 Hz–15 MHz. According to Cole–Cole plot, the equivalent circuit of the LC system has been found as a capacitor in parallel with a resistor. The resonance frequency, fr, of the R–C circuit has also been calculated as 1.59 MHz by phase angle versus frequency curve. The dielectric relaxation type of HBCP has been determined as nearly‐Debye type because the absorption coefficient, α, equals to 0.01655. From the conductivity point of view, HBCP displays dc conductivity at the low and high frequency regions that correspond to 100 Hz–12 kHz and 3.3 MHz–15 MHz, respectively. On the other hand, it has been revealed that the ac conductivity of the LC system investigated obeys Super Linear Power Law (SLPL) at the intermediate frequency domain. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
69.
Synthetic lubricating oils based on renewable sources, excluding petroleum, have a great importance among all of the lubricating
oil alternatives that are included in the research field about clean and environmentally friendly lubricating oil technologies.
One of the environmentally friendly lubricating oils is a vegetable oil-based product. In this study, the esterification product
of oleic acid with a fraction of molasses fusel oil as a lubricating oil candidate was determined according to the American
Society for Testing and Materials (ASTM) standard tests. The results indicate that the ester product can be used as an environmental
friendly lubricating oil or lubricating oil additive. 相似文献
70.
A new polymeric resin with glucose sulfonamide functions has been prepared for the extraction of boric acid. This poly (styryl sulfonamide) based resin has been demonstrated to be an efficient sorbent for the removal of boron. The resin had a boron loading capacity of 2.365 mmol.g−1 and showed reasonably rapid sorption ability. Splitting of sorbed boron can be achieved by simple acid leaching (2M H2SO4). 相似文献