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21.
M.?FouchierEmail author E.?Pargon L.?Azarnouche K.?Menguelti O.?Joubert T.?Cardolaccia Y.?C.?Bae 《Applied Physics A: Materials Science & Processing》2011,105(2):399-405
193 nm photoresists which are methacrylate-based polymers are very sensitive to vacuum ultra violet (VUV) light (100 nm<λ<200 nm) generated by plasmas used for pattern transfer technologies. Upon plasma treatment the physical properties of the
polymers can be deeply modified. To better understand the chemical changes involved, the absorption coefficient of a commercial
193 nm photoresist has been measured in the 120–280 nm wavelength range using a home built experimental set-up. The different
contributions to the absorption were identified by also measuring the spectra of model polymers and simpler polymer chains.
This knowledge was then used to identify the chemical changes in the photoresist upon heating up to 240°C. 相似文献
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Prestianni A Joubert L Chagnes A Cote G Adamo C 《Physical chemistry chemical physics : PCCP》2011,13(43):19371-19377
Density functional theory calculations were performed on uranyl complexed with nitrate and monoamide ligands (L) [UO(2)(NO(3))(2)·2L]. The obtained results show that the complex stability is mainly governed by two factors: (i) the maximization of the polarizability of the coordinating ligand and (ii) the minimization of the steric hindrance effects. Furthermore, the electrostatic interaction between ligands and uranium(vi) was found to be a crucial parameter for the complex stability. These results pave the way to the definition of (quantitative) property/structure relationships for the in silico screening of monoamide ligands with improved extraction efficiency of uranium(vi) in nitrate acidic solution. 相似文献
26.
Radovan erný Jean‐Marc Joubert Yaroslav Filinchuk Yves Feutelais 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(5):i63-i65
The crystal structure of Tl2Te, dithallium telluride, has been determined by single‐crystal X‐ray diffraction. The analysis of the structure shows that this compound is the first known representative of a new crystal structure type. The structural relationship with the related Tl5Te3 phase is discussed. 相似文献
27.
Laboratoire de Physico-Chimie des Matériaux Luminescents; Université Claude Bernard Lyon 1, URA CRS 442; 43, bd du 11 novembre
1918, bat. 205; 69622 Villeurbanne CEDEX, FRANCE. Published in Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 4, pp. 126–137,
July–August, 1995. 相似文献
28.
C. Joubert A. Michel L. Choplin P. Cassagnau 《Journal of Polymer Science.Polymer Physics》2003,41(15):1779-1790
A viscoelastic approach of the compression set test is addressed in this work. This test measures the ability of rubber compounds to retain elastic properties after prolonged action of compressive stresses. Elastic properties were tested by recording the normal stress under a constant deformation of 25% with a laboratory rheometer. Considering the Boltzmann superposition principle, compression set data were modeled from the relaxation of Young's modulus, described by a Maxwell spectrum plus a constant E∞ defining the elastic properties at the long times. This approach was developed with the copolymer of ethylene and vinyl acetate (EVA) networks crosslinked by radical chemistry and by an exchange reaction between acetate groups and silane compounds as crosslinking agents. Regarding the recovery of the elastic properties, radical chemistry provided better results than the exchange reaction for the identical crosslinking density of the network. Then, the Curro–Pincus molecular approach was developed to understand the influence of the microstructure of the EVA network on the elastic properties. The difference of the elastic properties between the two networks crosslinked by two different chemistry means was accounted for by considering the probability of having a dangling end of n units for a random crosslinking process. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1779–1790, 2003 相似文献
29.
Mamar Rekhis Ourida Ouamerali Laurent Joubert Vincent Tognetti Carlo Adamo 《Journal of Molecular Structure》2008,863(1-3):79-83
HOMO and LUMO (FMOs) play important role in the optical properties of meridianal isomer of tris(8-hydroxyquinolino)aluminum (mer-Alq3) and its derivatives. The frontier molecular orbitals (FMOs) also play a vital role in the process of charge transport. It is urgent to find the reason of FMO distribution pattern among the ligands. The structures of mer-Alq3 and its “CH”/N substituted derivatives have been optimized at the B3LYP/6-31G* level. Energy decomposition analysis has been performed at the B3LYP/DZP level. The results of energy-partitioning analysis of ground states are discussed. It has been explained that HOMOs are on A-ligands due to weaker electrostatic interaction energy between La-AlLbLc fragments while LUMOs are on B-ligands due to weaker orbital interaction energy between Lb-AlLaLc fragments. 相似文献
30.
In the B2O3? MO? MS (M = Mg, Mn, Fe, Co, Zn, Cd) systems six ternary phases have been isolated, four of them having the structure of the cubic variety of the boracite, Mg3B7O13Cl, and two the structure of the sodalite, Na4(SiAlO4)3Cl. Some properties of the new phases have been investigated. 相似文献