Refactoring is an integral part of the modern software development process. Often, the refactoring must be performed at the global level with modifications in a large number of files. Making these ...modifications is a long and painstaking work. However, users rarely employ automated tools for this purpose because they consider them unreliable and difficult to use. In this paper, a new tool for transforming the source code is described. It is based on the intuitively clear specification of transformation rules in the form of short code fragments in C or C++. These rules describe the code before and after the transformation. We believe that, due to the absence of additional abstractions (such as domain-specific languages), this approach can be easily used in practice. Even though the tool uses source code templates, it operates on the level of the abstract syntax tree. This enables the tool to better analyze the code and verify the validity of transformations.
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The results of calculating the adjustment factor for the geometric dispersion of sound velocity
in compact products of square cross section for various ratios of thickness to the side of cross ...section are presented. Using simulation in the ANSYS software environment, it has been shown that as the ratio increases, the main vibration mode transforms, causing the emergence of intrinsic resonance in the compact product. The transformation is from longitudinal waves in compact products of the “pile” type to Lamb waves in compact products of the “plate” type. At the same time, a nonlinear change in the coefficient
occurs in compact products that makes it possible to make a correction for the effect of geometric dispersion. The dispersion dependence of the coefficient
on the ratio of the thickness to the side of the product section has been calculated in compact square cross-section objects.
An experimental study of two efficient receptivity mechanisms of excitation of cross-flow (CF) instability modes is carried out in a boundary layer of a real airfoil section of a swept wing due to: ...(i) action of localized surface vibrations, and (ii) scattering of 2D freestream vortices on them. It is found that the two mechanisms lead to rather efficient excitation of CF-modes both at surface vibration frequency and at combination 'vortex-vibration' frequencies. First estimations of the corresponding localized receptivity coefficients are obtained. Direct comparison of the experimental amplification curves of the excited CF-modes with those calculated based on the linear stability theory (LST) has shown that the experimental data obtained at vibration frequency are in excellent agreement with the LST. At the same time, growth rates of the CF-modes excited at combination frequencies are found to be completely inconsistent with the LST. A possible explanation of this phenomenon via action of a new efficient distributed receptivity mechanism is suggested. This mechanism is associated with scattering of freestream vortices on rather high-amplitude CF-modes excited by surface vibrations.
Abstract
The article discusses possible options for a low-temperature induction heating system (LTIHS) of flat metal products in a traveling electromagnetic field. The problem of calculating eddy ...currents, active and reactive powers induced in a heated flat object, as well as electromagnetic forces acting on the object moving it in a given direction, is posed and solved. A mathematical model has been developed that takes into account the dependence of the influence on the main parameters of the electromagnetic field of the following factors: geometric dimensions of the air gap between the poles of the magnetic circuit and the heated flat body; the longitudinal edge effect caused by the open circuit of the magnetic circuit of the inductor, as well as the transverse edge effect associated with the appearance of the longitudinal components of eddy currents in a heated flat object. The solution of particular problems of LTIHS in one- and two-dimensional formulation allows them to be simplified and to perform calculations for various design variants of induction heating devices with a traveling electromagnetic field, using a one-dimensional model that explicitly takes into account the features of electromagnetic processes in the systems under study.
Cisplatin and its derivatives are widely used chemotherapeutic agents for the treatment of many cancers, including hepatoblastoma, brain tumors, and germ-cell tumors. This therapy contributed to the ...dramatic increase in the survival rate. However, its use is restricted by the high incidence of irreversible ototoxicity associated with cisplatin application (in more than 60% of the children receiving it). Some studies have reported that genetic variants of TPMT (rs 12201199), COMT (rs4646316), and ABCC3 (rs 1051640) are conferring increased risk of developing cisplatin-induced hearing loss. However, in other studies the results were not replicated. In the present study, we replicated the previous studies based on an independent cohort of Russian patients. SNP genotypes for rs 12201199, rs4646316 and rs 1051640 were determined in DNA samples obtained from 16 patients who developed hearing loss and a group of 34 patients whose hearing was retained. The association between TPMT (rs 12201199), COMT (rs4646316), and ABCC3 (rs 1051640) variants and the hearing loss was not observed in our cohort.
Research based on the pulsed neutron experiment method (α-method) of subcriticality monitoring of the spent fuel pool at the Smolensk NPP is presented. The procedure includes stationary and ...nonstationary neutron-physical calculations and measurements of the main characteristics of a subcritical multiplying system, which the spent-fuel pool is. A description of the STEPAN-KhOYaT software specially developed for the computational support of the pulsed experiment is given. The subcriticality for real loads of spent-fuel pools is calculated and measured using the procedure.
The details of the well-known method for representing 1/
f
noise by a sum of stationary processes are presented. Two series of shaping filters are applied in the frequency band specified by the user. ...The relations for the filter parameters are determined. The error in the approximation of the spectrum is considered. An algorithm for modeling fluctuations in the form of a system of first-order stochastic difference equations is proposed. The algorithm is intended to be used in simulation models applied to study the errors of navigation systems.
To improve the outcomes in children with hepatoblastoma.
There were 160 children with focal liver lesions who underwent surgery at the department of liver transplantation in 2008-2019. Patients with ...malignant tumors made up 77% (
=123). Hepatoblastoma (HB) prevailed (86%,
=106). Liver transplantation was performed in 19 (18%) patients with HB. Median follow-up after transplantation was 24.3 months by December 2019. Follow-up period did not exceed 4 years in more than 2/3 of patients.
Overall and disease-free 10-year survival was 87.1% and 82.7%, respectively. Similar values were observed after resections (91.1% and 86.6%). At the same time, actuarial 4-year survival after liver transplantation for HB was 68%.
Improvement of treatment outcomes may be achieved through multidisciplinary interaction ensuring timely drug therapy and liver transplantation.
The possibility of the effective use of the kinetic indentation method in combination with the acoustic emission method for evaluating the fracture toughness of titanium nitride hardening coatings is ...shown. It is established that the occurrence of the first jog on the loading line of the kinetic indentation diagram in “load–indentor displacement–time” coordinates is due to the formation of the first crack in the coating and practically coincides in time with the occurrence of the acoustic emission impulse with an increased energy value. This permits a more accurate and substantiated determination of the critical load, indentation depth of the indentor, and hardness at which the first visible ring crack forms around the impression on the coating surface.
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