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排序方式: 共有328条查询结果,搜索用时 46 毫秒
31.
V. V. Belyakov A. I. Chumakov A. Y. Nikiforov V. S. Pershenkov P. K. Skorobogatov A. V. Sogoyan 《Russian Microelectronics》2003,32(2):105-118
A review is presented of an integrated approach to hardness assurance, embracing single-event and global pulsed-ionization effects. The strategy essentially combines numerical and physical simulation in order to obtain reliable data on IC radiation response with minimum expenditure of time and money. The way in which calculations and measurements should be combined depends on the type of IC and the radiation conditions. It is shown that the cost of measurement can be reduced by using laboratory radiation simulators and each form of radiation of interest can be simulated with an agent readily available for the tester. Particular coverage is given to simulation with lasers. 相似文献
32.
VIu Chumakov 《Canadian Metallurgical Quarterly》1996,110(5):73-75
Lymphatic networks of the heart were studied in sheep. Principal scheme of lymphatic networks structural organization in endocardium, myocardium and epicardium of the mammals studied was established to have a series of regularities similar to those in man and animals although possessing specific peculiarities. Lymphomicrocirculatory bed of the heart is composed of interdependent lymphatic networks of endocardium, myocardium and epicardium. Endocardial and epicardial lymphatic networks are plane and single-layered, while myocardial one is spatial. All heart coats lymphatic networks are characterized with local peculiarities (different loop parameters, capillary diameter and density in some areas) which indicates varying drainage and state of metabolism in different heart region. 相似文献
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D. Tillakhodzhaev M. U. Sadykov Yu. Yu. Lazauskas T. A. Sabirov F. P. Chumakov I. Taleikene 《Fibre Chemistry》1987,18(3):233-236
Conclusions Results of this research have shown the efficiency and economic advisability of using the method of reagent treatment of wastewater from the washing division of plants manufacturing triacetate yarns, with the objective of cleaning them up from A-1 lubricant.The economic benefit on introduction of the developed method for cleaning up wastewater from A-1 lubricant will be 351,000 rubles per year at the Kaunas plant and 102,000 rubles per year at the Engels plant.Translated from Khimicheskie Volokna, No. 3, pp. 53–55, May–June, 1986. 相似文献
36.
Method for reconstructing atmospheric optical parameters from the data of polarization lidar sensing
Inversion of polarization lidar sensing data based on the form of the lidar sensing equation with allowance for contributions from multiple-scattering calls for a priori information on the scattering phase matrix. In the present study the parameters of the Stokes vectors for various propagation media, including those with the scattering phase matrices that vary along the measuring range, are investigated. It is demonstrated that, in spaceborne lidar sensing, a simple parameterization of the multiple-scattering contribution is applicable and the polarization signal's characteristics depend mainly on the lidar and depolarization ratios, whereas differences in the angular dependences of the matrix components are no longer determining factors. An algorithm for simultaneous reconstruction of the profiles of the backscattering coefficient and depolarization and lidar ratios in an inhomogeneous medium is suggested. Specific features of the methods are analyzed for the examples of interpretation of lidar signal profiles calculated by the Monte Carlo method and are measured experimentally. 相似文献
37.
1. | Rolling of steel at 1100° and higher leads to austenite grain growth after annealing. |
2. | A recrystallization threshold appears with plastic deformation at temperatures up to 1100°, the range of the recrystallization threshold broadening as the temperature of the preceding plastic deformation decreases. Plastic deformation =20% at 1150° always leads to a jump of austenite grain growth with repeated quenching, and for steel rolled at 1150 and 1200° the region of austenite grain growth broadens to =30–40%. |
3. | At all degrees of deformation at different temperatures the average diameter of austenite grains decreases with decreasing preliminary rolling temperatures and increasing degrees of repeated plastic deformation. This undoubtedly affects the consistency of the properties inherited by high-speed steel during subsequent high-temperature plastic deformation. |
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Yangkun He Gerhard H. Fecher Chenguang Fu Yu Pan Kaustuv Manna Johannes Kroder Ajay Jha Xiao Wang Zhiwei Hu Stefano Agrestini Javier Herrero-Martín Manuel Valvidares Yurii Skourski Walter Schnelle Plamen Stamenov Horst Borrmann Liu Hao Tjeng Rudolf Schaefer Stuart S. P. Parkin John Michael D. Coey Claudia Felser 《Advanced materials (Deerfield Beach, Fla.)》2020,32(45):2004331
The development of high-density magnetic recording media is limited by superparamagnetism in very small ferromagnetic crystals. Hard magnetic materials with strong perpendicular anisotropy offer stability and high recording density. To overcome the difficulty of writing media with a large coercivity, heat-assisted magnetic recording was developed, rapidly heating the media to the Curie temperature Tc before writing, followed by rapid cooling. Requirements are a suitable Tc, coupled with anisotropic thermal conductivity and hard magnetic properties. Here, Rh2CoSb is introduced as a new hard magnet with potential for thin-film magnetic recording. A magnetocrystalline anisotropy of 3.6 MJ m−3 is combined with a saturation magnetization of μ0Ms = 0.52 T at 2 K (2.2 MJ m−3 and 0.44 T at room temperature). The magnetic hardness parameter of 3.7 at room temperature is the highest observed for any rare-earth-free hard magnet. The anisotropy is related to an unquenched orbital moment of 0.42 μB on Co, which is hybridized with neighboring Rh atoms with a large spin–orbit interaction. Moreover, the pronounced temperature dependence of the anisotropy that follows from its Tc of 450 K, together with a thermal conductivity of 20 W m−1 K−1, make Rh2CoSb a candidate for the development of heat-assisted writing with a recording density in excess of 10 Tb in.−2. 相似文献
40.
Dirk H. Ortgies Francisco J. Teran Uéslen Rocha Leonor de la Cueva Gorka Salas David Cabrera Alexander S. Vanetsev Mihkel Rähn Väino Sammelselg Yurii V. Orlovskii Daniel Jaque 《Advanced functional materials》2018,28(11)
Magnetic nanoparticles (M:NPs) are unique agents for in vivo thermal therapies due to their multimodal capacity for efficient heat generation under optical and/or magnetic excitation. Nevertheless, their transfer from laboratory to the clinic is hampered by the absence of thermal feedback and by the influence that external conditions (e.g., agglomeration and biological matrix interactions) have on their heating efficiency. Overcoming these limitations requires, first, the implementation of strategies providing thermal sensing to M:NPs in order to obtain in situ thermal feedback during thermal therapies. At the same time, M:NPs should be modified so that their heating efficiency will be maintained independently of the environment and the added capability for thermometry. In this work, optomagnetic hybrid nanostructures (OMHSs) that simultaneously satisfy these two conditions are presented. Polymeric encapsulation of M:NPs with neodymium‐doped nanoparticles results in a hybrid structure capable of subtissue thermal feedback while making the heating efficiency of M:NPs independent of the medium. The potential application of the OMHSs herein developed for fully controlled thermal therapies is demonstrated by an ex vivo endoscope‐assisted controlled intracoronary heating experiment. 相似文献