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1.
Andreiy A. Gushchin Vladimir I. Grinevich Valeriy Ya. Shulyk Elena Yu. Kvitkova Vladimir V. Rybkin 《Plasma Chemistry and Plasma Processing》2018,38(1):123-134
The processes of degradation of 2,4-dichlorophenol (2,4-DCP) aqueous solutions under the action of atmospheric pressure of DBD in oxygen were studied. The degradation of 2,4-DCP proceeds efficiently, the degree of decomposition reaching 100%. The degradation kinetics of 2,4-DCP obeys a formal first-order kinetic law on concentration of 2,4-DCP. The effective rate constants depend weakly on the experimental conditions and are equal to ~ 2 s?1. Based on experimental data, the energy efficiency of 2,4-DCP decomposition was determined to be in the range of 0.039–0.173 molecules per 100 eV depending on the experimental conditions. The composition of the products was studied by gas chromatography, chromatography-mass spectrometry, UV/visible spectroscopy, fluorescent methods and some chemical methods. The main decomposition products present in the solution were found to be carboxylic acids, aldehydes and chloride ions, whereas carbon dioxide and molecular chlorine appear in the gas. The results obtained are compared with similar data from other advanced oxidation processes (AOP’s) methods. 相似文献
2.
3.
As in the case of soliton PDEs in 2+1 dimensions, the evolutionary form of integrable dispersionless multidimensional PDEs is nonlocal, and the proper choice of integration constants should be the one dictated by the associated inverse scattering transform (IST). Using the recently made rigorous IST for vector fields associated with the so‐called Pavlov equation , in this paper we establish the following. 1. The nonlocal term arising from its evolutionary form corresponds to the asymmetric integral . 2. Smooth and well‐localized initial data evolve in time developing, for , the constraint , where . 3. Because no smooth and well‐localized initial data can satisfy such constraint at , the initial () dynamics of the Pavlov equation cannot be smooth, although, because it was already established, small norm solutions remain regular for all positive times. We expect that the techniques developed in this paper to prove the above results should be successfully used in the study of the nonlocality of other basic examples of integrable dispersionless PDEs in multidimensions. 相似文献
4.
Written in the evolutionary form, the multidimensional integrable dispersionless equations, exactly like the soliton equations in 2+1 dimensions, become nonlocal. In particular, the Pavlov equation is brought to the form vt = vxvy - ?x-1?y[vy + vx2], where the formal integral ?x?1 becomes the asymmetric integral \( - \int_x^\infty {dx'} \). We show that this result could be guessed using an apparently new integral geometry lemma. It states that the integral of a sufficiently general smooth function f(X, Y) over a parabola in the plane (X, Y) can be expressed in terms of the integrals of f(X, Y) over straight lines not intersecting the parabola. We expect that this result can have applications in two-dimensional linear tomography problems with an opaque parabolic obstacle. 相似文献
5.
P. G. Grinevich A. E. Mironov S. P. Novikov 《Theoretical and Mathematical Physics》2010,164(3):1110-1127
We study the manifold of complex Bloch-Floquet eigenfunctions for the zero level of a two-dimensional nonrelativistic Pauli
operator describing the propagation of a charged particle in a periodic magnetic field with zero flux through the elementary
cell and a zero electric field. We study this manifold in full detail for a wide class of algebraic-geometric operators. In
the nonzero flux case, the Pauli operator ground state was found by Aharonov and Casher for fields rapidly decreasing at infinity
and by Dubrovin and Novikov for periodic fields. Algebraic-geometric operators were not previously known for fields with nonzero
flux because the complex continuation of “magnetic” Bloch-Floquet eigenfunctions behaves wildly at infinity. We construct
several nonsingular algebraic-geometric periodic fields (with zero flux through the elementary cell) corresponding to complex
Riemann surfaces of genus zero. For higher genera, we construct periodic operators with interesting magnetic fields and with
the Aharonov-Bohm phenomenon. Algebraic-geometric solutions of genus zero also generate soliton-like nonsingular magnetic
fields whose flux through a disc of radius R is proportional to R (and diverges slowly as R → ∞). In this case, we find the
most interesting ground states in the Hilbert space L
2
(ℝ
2
). 相似文献
6.
7.
K. B. Aleinikova E. N. Zinchenko A. V. Arakcheeva V. V. Grinevich 《Crystallography Reports》2002,47(4):555-558
An amorphous sediment was prepared by the decomposition of potassium oxofluoroniobate K2 ? x Nb4O3(O, F)3F in water. For this sediment, the atomic radial distribution function was analyzed with the use of a fragment model, which allows one to interpret expanded coordination spheres as being formed by first several strongest diffusion maxima. These spheres carry the most reliable information on the structure. It is shown that the amorphous sediment consists of the randomly packed Nb(O,F)6-octahedra with interatomic distances close to those observed in the ordered region in the N-Nb2O5 structure. During decomposition in water, the initial K2 ? x Nb4O3(O, F)3F phase loses KF-layers, whereas Nb6 clusters with metal bonds are destroyed. 相似文献
8.
Grinevich V. I. Ivanova N. V. Kostrov V. V. 《Russian Journal of Applied Chemistry》2003,76(4):561-565
Data on the kinetics of plasma-enhanced and plasma-enhanced catalytic oxidation of carbon(II) oxide with IK-1-6 catalyst are presented. The influence exerted by IK-1-6 catalyst on the conversion of carbon-containing components of the CO-CO2-CH4-SO2-air gas mixture in barrier-discharge plasma is analyzed. 相似文献
9.
Barrier-discharge plasma treatment of real surface water to remove organic pollutants was studied. Plasma treatment decreases the potential toxicity of snowmelt and rainfall runoff containing ammonium and chloride ions, oil products, phenols, and carboxylic acids (as recalculated for CH3COOH). 相似文献
10.
A. G. Bubnov E. Yu. Burova V. I. Grinevich V. V. Rybkin J.-K. Kim H.-S. Choi 《Plasma Chemistry and Plasma Processing》2006,26(1):19-30
This study investigated the processes for the destruction of phenol and its derivatives (resorcin and pyrocatechol) in aqueous
solutions under the action of an oxygen dielectric barrier discharge (DBD) at atmospheric pressure in the presence or absence
of catalysts in the plasma zone. It was shown that the DBD had a high decomposition efficiency for phenol and its derivatives
(up to 99%). Phenol was the most stable and pyrocatechol was the least. In a plasma-catalytic hybrid process, the effective
rate constants for phenol, resorcin and pyrocatechol decomposition were 11, 4 and 2.5 times higher, respectively, than those
for the DBD treatment without catalysts. The process also resulted in a 1.4, 1.6 and 1.2 times higher rate of carboxylic acid
formation for phenol, resorcin and pyrocatechol, respectively. The fractional conversion into the respective carboxylic acids
reached 56% for phenol and 68% for resorcin and pyrocatechol. 相似文献