排序方式: 共有122条查询结果,搜索用时 443 毫秒
101.
102.
A. De Roeck J. Ellis C. Grojean S. Heinemeyer K. Jakobs G. Weiglein J. Wells G. Azuelos S. Dawson B. Gripaios T. Han J. Hewett M. Lancaster C. Mariotti F. Moortgat G. Moortgat-Pick G. Polesello S. Riemann M. Schumacher K. Assamagan P. Bechtle M. Carena G. Chachamis K. F. Chen S. De Curtis K. Desch M. Dittmar H. Dreiner M. Dührssen B. Foster M. T. Frandsen A. Giammanco R. Godbole S. Gopalakrishna P. Govoni J. Gunion W. Hollik W. S. Hou G. Isidori A. Juste J. Kalinowski A. Korytov E. Kou S. Kraml M. Krawczyk A. Martin D. Milstead V. Morton-Thurtle K. Moenig B. Mele E. Ozcan M. Pieri T. Plehn L. Reina E. Richter-Was T. Rizzo K. Rolbiecki F. Sannino M. Schram J. Smillie S. Sultansoy J. Tattersall P. Uwer B. Webber P. Wienemann 《The European Physical Journal C - Particles and Fields》2010,66(3-4):525-583
Discoveries at the LHC will soon set the physics agenda for future colliders. This report of a CERN Theory Institute includes the summaries of Working Groups that reviewed the physics goals and prospects of LHC running with 10 to 300 fb?1 of integrated luminosity, of the proposed sLHC luminosity upgrade, of the ILC, of CLIC, of the LHeC and of a muon collider. The four Working Groups considered possible scenarios for the first 10 fb?1 of data at the LHC in which (i) a state with properties that are compatible with a Higgs boson is discovered, (ii) no such state is discovered either because the Higgs properties are such that it is difficult to detect or because no Higgs boson exists, (iii) a missing-energy signal beyond the Standard Model is discovered as in some supersymmetric models, and (iv) some other exotic signature of new physics is discovered. In the contexts of these scenarios, the Working Groups reviewed the capabilities of the future colliders to study in more detail whatever new physics may be discovered by the LHC. Their reports provide the particle physics community with some tools for reviewing the scientific priorities for future colliders after the LHC produces its first harvest of new physics from multi-TeV collisions. 相似文献
103.
104.
105.
Hydrogels based on N,N-dimethylacrylamide (DMAAm), allylthiourea (ATU), and maleic acid (MA) were synthesized by free-radical cross-linking copolymerization in water with N,N-methylene-bis(acrylamide) (BAAm) as the cross-linker, ammonium persulfate (APS) as the initiator, and N,N,N′,N′-tetramethylenediamine (TEMED) as the activator. Since Se(IV) is the most serious interfering element in the electroanalytical (polarographic or voltammetric) determination of lead and cadmium, a new method for their correct determination after selective separation of the interfering ion (selenite) was developed by using poly(N,N-dimethylacrylamide-co-allylthiourea) [P(DMAAm-co-ATU)] hydrogels containing reducing pedant groups like allylthiourea. The proposed method showed good reproducibility and accuracy with relative standard deviations of 8.5 and 3.4% and relative errors of ?6.0 and ?5.4% for the determination of 5.0 × 10?5 M Pb(II) and Cd(II), respectively, next to 3.0 × 10?5 M Se(IV). 相似文献
106.
Measurement of the second-harmonic power generated by a quasi-phase-matched (QPM) grating as a function of the frequency detuning parameter yields the Fourier transform (FT) magnitude of the complex nonlinear coefficient profile along the QPM device. This FT magnitude can be measured by tuning either the wavelength of the fundamental laser beam or the temperature of the QPM grating. However, the measured magnitude of the FT cannot be unambiguously inverted without the FT phase to uniquely recover the complex nonlinear coefficient profile of the QPM grating. As we demonstrate in this work, this ambiguity can be completely eliminated by placing a stronger and thinner nonlinear sample against the input or output of the QPM device of interest and measuring the detuning curve of this composite structure. By construction, the nonlinear profile of this assembly has a sharp peak due to the thinner sample, followed by the weaker, broader profile of the QPM grating, which essentially constitutes a minimum-phase function. Therefore, its FT phase can be calculated uniquely from its measured FT magnitude, for example by applying to the FT amplitude the logarithmic Hilbert transform or an iterative error-reduction algorithm. This processing then enables the full recovery of the complex nonlinear coefficient profile of the QPM device from its measured detuning curve. In this paper, we demonstrate with numerical examples that this powerful new technique can accurately recover the period, envelope, and chirp parameters of any QPM grating. 相似文献
107.
Ozcan Altintas Gurkan Hizal Umit Tunca 《Journal of polymer science. Part A, Polymer chemistry》2006,44(19):5699-5707
Hetero‐arm star ABC‐type terpolymers, poly(methyl methacrylate)‐polystyrene‐poly(tert‐butyl acrylate) (PMMA‐PS‐PtBA) and PMMA‐PS‐poly(ethylene glycol) (PEG), were prepared by using “Click” chemistry strategy. For this, first, PMMA‐b‐PS with alkyne functional group at the junction point was obtained from successive atom transfer radical polymerization (ATRP) and nitroxide‐mediated radical polymerization (NMP) routes. Furthermore, PtBA obtained from ATRP of tBA and commercially available monohydroxyl PEG were efficiently converted to the azide end‐functionalized polymers. As a second step, the alkyne and azide functional polymers were reacted to give the hetero‐arm star polymers in the presence of CuBr/N,N,N′,N″,N″‐pentamethyldiethylenetriamine ( PMDETA) in DMF at room temperature for 24 h. The hetero‐arm star polymers were characterized by 1H NMR, GPC, and DSC. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 5699–5707, 2006 相似文献
108.
Ahmed Nuri Kursunlu Ersin Guler Hakan Dumrul Ozcan Kocyigit Ilkay Hilal Gubbuk 《Applied Surface Science》2009,255(21):8798-8803
In this study, three Schiff base ligands and their complexes were synthesized and characterized by infrared spectroscopy (IR), thermogravimetric analyses (TGA), nuclear magnetic resonance (NMR), elemental analysis and magnetic susceptibility apparatuses. Silica gel was respectively modified with Schiff base derivatives, (E)-2-[(2-chloroethylimino)methyl]phenol, (E)-4-[(2-chloroethylimino)methyl]phenol and N,N′-[1,4-phenilendi(E)methylidene]bis(2-chloroethanamine), after silanization of silica gel by (3-aminopropyl)trimethoxysilane (APTS) by using a suitable method. Characterization of the surface modification was also performed with IR, TGA and elemental analysis. The immobilized surfaces were used for Co(II) and Ni(II) sorption from aqueous solutions and values of sorption were detected by atomic absorption spectrometer (AAS). 相似文献
109.
In this paper we consider a generalization of the so called M/G/ model where M types of sessions enter a buffer. The instantaneous rates of the sessions are functions of the occupancy of an M/G/ system with Weibullian G distributions. In particular we assume that a session of type i transmits r
i
cells per unit time and lasts for a random time with a Weibull distribution given by
x) \sim {\text{e}}^{{\text{ - }}\gamma ix^{\alpha i} } $$
" align="middle" border="0">
, where 0<
i
<1,
i
>0. We show that the complementary buffer occupancy distribution for large buffer size is Weibullian whose parameters can be determined as the solution of a deterministic nonlinear knapsack problem. For
i
<0.5, upper and lower bound factors are determined. When specialized to the homogeneous case, i.e., when all the sessions are identical, the result coincides with a lower bound reported in the literature. 相似文献
110.
The title compound crystallizes triclinically in space group of P1. The C2-COOH and C3-COOH molecular groups are planar. The crystal structure is stabilized by the formation of intermolecular (O-HO) hydrogen bonds. 相似文献