136 research outputs found
ΠΠΈΠΊΡΠΎΡΠ²Π΅ΡΠ΄ΠΎΡΡΡ Π²Π°Π»ΠΈΠΊΠΎΠ² ΠΈΠ· Π±ΡΠΎΠ½Π·Ρ ΠΠ-19Π-01, Π½Π°Π½Π΅ΡΠ΅Π½Π½ΡΡ ΠΊΠ°ΠΊ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠ°Ρ ΠΌΡΠ»ΡΠΈΠΌΠΎΠ΄Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΏΠΎΠΊΡΡΡΠΈΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Π»Π°Π·Π΅ΡΠ½ΠΎΠΉ Π½Π°ΠΏΠ»Π°Π²ΠΊΠΈ
Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²Π° Π»Π°Π·Π΅ΡΠ½ΠΎΠΉ Π½Π°ΠΏΠ»Π°Π²ΠΊΠΈ ΠΈ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ Π»Π°Π·Π΅ΡΠ½ΠΎΠΉ Π½Π°ΠΏΠ»Π°Π²ΠΊΠΈ Π΄Π»Ρ ΡΠΎΠ·Π΄Π°Π½ΠΈΡ ΠΌΡΠ»ΡΡΠΈΠΌΠΎΠ΄Π°Π»ΡΠ½ΡΡ
ΠΏΠΎΠΊΡΡΡΠΈΠΉ ΠΈΠ· ΡΠ°Π·Π½ΠΎΡΠΎΠ΄Π½ΡΡ
ΠΌΠ΅ΡΠ°Π»Π»ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΌΠΈΠΊΡΠΎΡΠ²Π΅ΡΠ΄ΠΎΡΡΠΈ Π² ΠΏΠΎΠΏΠ΅ΡΠ΅ΡΠ½ΠΎΠΌ ΡΠ΅ΡΠ΅Π½ΠΈΠΈ Π½Π°ΠΏΠ»Π°Π²Π»Π΅Π½Π½ΡΡ
Π²Π°Π»ΠΈΠΊΠΎΠ² ΠΈΠ· Π°Π»ΡΠΌΠΈΠ½ΠΈΠ΅Π²ΠΎΠΉ Π±ΡΠΎΠ½Π·Ρ. ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ Π²Π»ΠΈΡΠ½ΠΈΠ΅ ΡΠΊΠΎΡΠΎΡΡΠΈ Π»Π°Π·Π΅ΡΠ½ΠΎΠΉ Π½Π°ΠΏΠ»Π°Π²ΠΊΠΈ Π½Π° ΠΌΠΈΠΊΡΠΎΡΠ²Π΅ΡΠ΄ΠΎΡΡΡ Π² Π½Π°ΠΏΠ»Π°Π²Π»Π΅Π½Π½ΡΡ
Π²Π°Π»ΠΈΠΊΠ°Ρ
.The advantages and the capabilities of laser cladding are analyses for used laser cladding for applying multimodal coatings from heterogeneous metal work materials. Results of microhardness investigations in cross section of cladding tracks from Al-bronze are exhibited. The influence of cladding velocity on microhardness are examined
ΠΠΈΠ½Π°ΠΌΠΈΠΊΠ° ΡΡΠΈΠΊΡΠΈΠΎΠ½Π½ΡΡ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΠΏΡΠΈ ΡΡΠ΅Π½ΠΈΠΈ Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ΅ΠΉ ΡΡΠ°Π»ΠΈ Π°ΡΡΡΠ΅Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΊΠ»Π°ΡΡΠ° 12Π₯18Π10Π’ Ρ ΡΠ»ΡΡΡΠ°ΠΌΠ΅Π»ΠΊΠΎΠ·Π΅ΡΠ½ΠΈΡΡΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠΎΠΉ
Π ΡΠ°Π±ΠΎΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΡΡΠΈΠΊΡΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² ΠΏΡΠΈ ΡΡΠ΅Π½ΠΈΠΈ ΠΎΠ±ΡΠ΅ΠΌΠ½ΡΡ
ΡΠ»ΡΡΡΠ°ΠΌΠ΅Π»ΠΊΠΎΠ·Π΅ΡΠ½ΠΈΡΡΡΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΌΠΎΠ΄Π΅Π»ΡΠ½ΡΡ
ΠΎΠ±ΡΠ°Π·ΡΠΎΠ² ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π»Π°ΡΡ Π½Π΅ΡΠΆΠ°Π²Π΅ΡΡΠ°Ρ ΡΡΠ°Π»Ρ Π°ΡΡΡΠ΅Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΠΊΠ»Π°ΡΡΠ° 12Π₯18Π10Π’ Ρ ΡΠ»ΡΡΡΠ°ΠΌΠ΅Π»ΠΊΠΎΠ·Π΅ΡΠ½ΠΈΡΡΠΎΠΉ ΡΡΡΡΠΊΡΡΡΠΎΠΉ, ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ ABC ΠΏΡΠ΅ΡΡΠΎΠ²Π°Π½ΠΈΡ ΠΈ ΠΏΡΠΎΠΊΠ°ΡΠΊΠΈ. Π ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΡΡΡ
ΠΎΠ³ΠΎ ΡΡΠ΅Π½ΠΈΡ ΡΠΊΠΎΠ»ΡΠΆΠ΅Π½ΠΈΡ ΠΎΡΡΡΠ΅ΡΡΠ²Π»ΡΠ»Π°ΡΡ ΡΠ΅Π³ΠΈΡΡΡΠ°ΡΠΈΡ ΡΠΈΠ³Π½Π°Π»ΠΎΠ² Π²ΠΈΠ±ΡΠΎΡΡΠΊΠΎΡΠ΅Π½ΠΈΠΉ ΠΈ Π°ΠΊΡΡΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΠΌΠΈΡΡΠΈΠΈ
Estimation of field production profiles in case of asphaltene deposition
In this work, we aimed to predict possible field production scenarios in case of asphaltene deposition based on field data as well as recommend remediation and stimulation measures to mitigate the risks of asphaltene deposition in the reservoir. We considered the influence of asphaltene formation in the near-wellbore of producers on the production data without reservoir pressure maintenance system in one of the oil fields. The asphaltene envelope in the reservoir oil was obtained, and the operating conditions of the field were evaluated under the possibility of asphaltene deposition. According to the results of dynamic modeling, the pressure map was plotted and the low-pressure areas in the near-wellbore were shown, which contributes to the aggravation of the problem associated with the asphaltene envelope. Based on the geometrical features of the low-pressure area, the dependence of the permeability reduction in the near-wellbore of the production well on the operating time was obtained using the asphaltene deposition model proposed by Wang and Civan. Based on the Buckley-Leverett theory, the field production profiles were calculated with and without asphaltene deposition. A decrease in the oil rate and consequently, the decrease in cumulative oil production in the field is expected due to the damage formation by solids. Maintenance of the production level will be facilitated by treating the nearwellbore with aromatic solvents and maintaining the reservoir pressure above the asphaltene onset pressure
Particle-particle particle-mesh method for dipolar interactions:on error estimates and efficiency of schemes with analytical differentiation and mesh interlacing
The interlaced and non-interlaced versions of the dipolar particle-particle particle-mesh (P3M) method implemented using the analytic differentiation scheme (AD-P3M) are presented together with their respective error estimates for the calculation of the forces, torques, and energies. Expressions for the optimized lattice Green functions, and for the Madelung self-forces, self-torques and self-energies are given. The applicability of the theoretical error estimates are thoroughly tested and confirmed in several numerical examples. Our results show that the accuracy of the calculations can be improved substantially when the approximate (mesh computed) Madelung self-interactions are subtracted. Furthermore, we show that the interlaced dipolar AD-P3M method delivers a significantly higher accuracy (which corresponds approximately to using a twice finer mesh) than the conventional method, allowing thereby to reduce the mesh size with respect to the non-interlaced version for a given accuracy. In addition, we present similar expressions for the dipolar ik-differentiation interlaced scheme, and we perform a comparison with the AD interlaced scheme. Rough tests for the relative speed of the dipolar P3M method using ik-differentiation and the interlaced/non-interlaced AD schemes show that when FFT computing time is the bottleneck, usually when working at high precisions, the interlaced AD-scheme can be several times faster than the other two schemes. For calculations with a low accuracy requirement, the interlaced version can perform worse than the ik and the non-interlaced AD schemes.All authors are grateful to the DAAD organization for
providing ο¬nancial support. C.H. thanks the DFG for support
through the SimTech center of excellence, the ScaFaCoS collaboration, and the SFB 716, and acknowledges helpful discussions with A. Arnold and M. Pippig.Peer reviewe
ΠΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΠΌΠ΅ΡΠΎΠΏΡΠΈΡΡΠΈΠΉ ΠΏΠΎ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠΎΡΠΈΠ²ΠΎΠΏΠΎΠΆΠ°ΡΠ½ΠΎΠΉ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ Π² ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ ΡΡΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡΡ
Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ Π²Π΅ΡΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡ ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΎΠ½Π½ΡΡ
ΠΈ ΠΏΠ»Π°Π½ΠΈΡΡΡΡΠΈΡ
ΠΌΠ΅ΡΠΎΠΏΡΠΈΡΡΠΈΠΉ ΠΏΠΎ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΏΠΎΠΆΠ°ΡΠ½ΠΎΠΉ Π·Π°ΡΠΈΡΡ Π² ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΡΡΡΠ΅ΠΆΠ΄Π΅Π½ΠΈΡΡ
Π ΠΎΡΡΠΈΠΈ. ΠΏΠΎΡΡΠ΄ΠΎΠΊ ΡΠ°Π±ΠΎΡΡ ΡΡΠΊΠΎΠ²ΠΎΠ΄ΠΈΡΠ΅Π»Π΅ΠΉ ΠΎΠ±ΡΠ°Π·ΠΎΠ²Π°ΡΠ΅Π»ΡΠ½ΡΡ
ΠΎΡΠ³Π°Π½ΠΈΠ·Π°ΡΠΈΠΉ ΠΏΠΎ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΠΉ ΠΆΠΈΠ·Π½Π΅Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΡΡΠ°ΡΠΈΡ
ΡΡ ΠΈ ΠΏΠ΅ΡΡΠΎΠ½Π°Π»Π°.The article considers the whole complex of organizational and planning measures for conducting fire protection in educational institutions of Russia. the order of work of heads of educational organizations to ensure the safe functioning of students and staff
- β¦