26 research outputs found
Kolmogorov type inequalities for the Marchaud fractional derivatives on the real line and the half-line
Get PDFIn this paper we establish some new Kolmogorov type inequalities for the
Marchaud and Hadamard fractional derivatives of functions defined on a real
axis or semi-axis. Simultaneously we solve two related problems: the Stechkin
problem on the best approximation of unbounded operators by bounded ones on a
given class of elements and the problem of optimal recovery of operator on
elements from some class given with prescribed error. Keywords: inequalities
for derivatives, fractional derivatives, approx- imation of unbounded operators
by bounded ones, optimal recovery of operators, ideal lattice.Comment: 3 figure
Applications of Computer Simulation for Hydrodynamics of Multiphase Media in Studying Separation Processes in Mineral Dressing
No full textThe effect of external orienting electric field on dielectric relaxation of segmented polyesters in dilute solution
No full textAcceleration of the convergence of the Laguerre series in the problem of inverting the Laplace transform
No full textPROCESS OF WINNING OF SILVER FROM ITS ALLOYS
Full text linkFIELD: winning of silver with refining of silver alloys with simultaneous increased extraction of noble metal. SUBSTANCE: process includes dissolution of starting alloy in nitric acid in presence of ions of ammonium, separation of slag, treatment of heated solution of silver nitrate with ammonium hydroxide after sorption cleaning through anion-exchange resin, filtration of hydroxides of impurity metals. After electrolysis of silver from solution of silver nitrate electrolyte is returned for dissolution of alloy. EFFECT: single-stage winning of cathode silver, increased degree of extraction of silver without liquid waste and anode residue, refining of silver alloys with content of silver below 95% at commercial scale.Использование: касается получения серебра при аффинаже сплавов серебра с одновременным повышением извлечения благородного металла. Сущность изобретения: способ включает растворение исходного сплава в азотной кислоте в присутствии ионов аммония, отделение шлама, обработку гидроксидом аммония нагретого раствора азотнокислого серебра после сорбционной очистки на анионите, отфильтровывание гидроксидов примесных металлов, а после электролиза серебра из раствора азотнокислого серебра электролит возвращают на растворение сплава. Способ позволяет одностадийно получать катодное серебро, повысить прямое извлечение серебра, исключить жидкие отходы и анодные остатки, в промышленном масштабе вести переработку серебряных сплавов с содержанием серебра меньше 95%
The Kolmogorov and Stechkin problems for classes of functions whose second derivative belongs to the Orlicz space
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