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1.
P. B. Lovyrev A. I. Lavrov V. A. Babkin A. N. Aminov S. M. Melekhin Yu. P. Kazantsev P. M. Korol’kov 《Metallurgist》2006,50(3-4):152-157
Specifications require that all the welds in 12-m-diam. decomposers with a capacity of 3600 m3 be subjected to high-temperature tempering before going into service in order to alleviate the stresses from the welding
operation. Specialists at the organizations VNIIPTkhimnefteapparatury and VNIImontazhspetsstroi have proposed out-of-furnace
volumetric (complete) of the assembled decomposer with the use of special heaters. The use of this heating method has shortened
assembly operations while providing the welds with a highquality heat treatment and reducing the stresses overall (including
welding stresses, stresses from assembly of the decomposer, etc.) The technology ensures uniform heating of the housing of
the decomposer and provides for close control over the process. The experience gained in heat-treating decomposers can also
be used in the construction of other containers that come into contact with corrosive media.
__________
Translated from Metallurg, No. 3, pp. 61–64, March, 2006. 相似文献
2.
The software in information systems used by engineering personnel at metallurgical enterprises is considered. Such software operates automated workstations, support systems for decision making, information and modeling systems, expert systems, and so on. Typically, the software takes the form of desktop applications written in high-level programming languages (Visual C#, Visual Basic, etc.). The analysis of technological information from the enterprise’s database-management server entails the solution of programming problems, systems of differential equations, and mathematical-physics problems, for example. Such problems are unsolvable by the standard general-purpose programming languages. Therefore, the development of information and modeling systems requires access to outside software, such as Microsoft Excel and MATLAB. Interaction with Microsoft Excel depends on COM Interop technology, which requires the installation of Microsoft Office on each client computer. Interaction with MATLAB requires the preliminary assembly of a library in MATLAB Compiler and its connection to the program. MATLAB Runtime freeware must be installed on the client computer. However, desktop applications using Windows Forms do not meet the requirements of industrial information systems in terms of functionality, accessibility, and cross-platform compatibility. Accordingly, new technologies must be found for the creation of information systems. The best approach is the construction of web applications based on the ASP.NET MVC framework, which permits the transfer of mathematical libraries and modules for interaction with Microsoft Excel and MATLAB from Windows Forms, without modification. The structure of the web application employed in the development of information-system software is described. The web page employed has the following functional regions: the logo and title of the current page, the session-status menu, the function menu, group operations, notifications, and the working area. 相似文献
3.
V. V. Lavrov N. A. Spirin I. A. Gurin V. Yu. Rybolovlev A. V. Krasnobaev 《Steel in Translation》2017,47(8):538-543
Experience shows that the successful introduction of automated information systems at metallurgical enterprises largely depends on the technology and software selected. In the present work, the basic technology and software options available are briefly outlined. The starting point is Agile development, which is based on iterative procedures, the dynamic formation of user requirements, and their implementation through constant dialog within working groups consisting of various specialists (users, analysts, programmers, and testers). Iteration corresponds to relatively brief development times (as a rule, months), after which the user is given the next tested version of the software, with new functional properties. The list of additional functional properties in each new version represents user priorities and is drawn from the overall list of requirements before each iteration begins. In each iteration, the following procedures are completed in sequence: verification of the computational algorithm (with the introduction of new variables, where necessary); functional modeling of the system; improvement of subsystem structure; conceptual modeling of the database; generation of a model of the database; loading of the test data in the database; creation of the functional diagrams in the mathematical library; implementation of the subsystem’s client software; testing and debugging of the software; and the development of reference documentation. The Atlassian JIRA system is used to control individual tasks and monitor their overall realization within the process of collective software development. The Atlassian Bitbucket platform provides remote storage for code storage and control of the software version. On the basis of up-to-date approaches to software development, systems that are functional, reliable, east to use, expandable, and integrable may be created. Such systems are characterized by minimum risk and acceptable cost. 相似文献
4.
S. D. Lavrov A. P. Shestakova E. D. Mishina Yu. R. Efimenkov A. S. Sigov 《Semiconductors》2018,52(6):771-775
A design for a high-sensitivity photodetector with a single layer of MoS2 transition-metal dichalcogenide used as the basic functional element is proposed and the process of its fabrication is presented step by step. Quality evaluation and the selection of functional MoS2 flakes is based on the results of combined optical characterization. The main operating characteristics of the fabricated device are investigated and a photosensitivity of 1.4 mA/W is demonstrated. A difference of this device in comparison with existing analogues is its high photosensitivity at low operating voltages (in the range of ±3 V). 相似文献
5.
Using the results of experiments with rock salt samples under various loading regimes as an example, the regularities of the Kaiser effect formation and manifestation in rocks with plastic properties are investigated. 相似文献
6.
M. V. Budantsev R. A. Lavrov A. G. Pogosov E. Yu. Zhdanov D. A. Pokhabov 《Semiconductors》2011,45(2):203-207
Extraordinary piecewise parabolic behavior of the magnetoresistance has been experimentally detected in the two-dimensional
electron gas with a dense triangular lattice of antidots, where commensurability magnetoresistance oscillations are suppressed.
The magnetic field range of 0–0.6 T can be divided into three wide regions, in each of which the magnetoresistance is described
by parabolic dependences with high accuracy (comparable to the experimental accuracy) and the transition regions between adjacent
regions are much narrower than the regions themselves. In the region corresponding to the weakest magnetic fields, the parabolic
behavior becomes almost linear. The observed behavior is reproducible as the electron gas density changes, which results in
a change in the resistance by more than an order of magnitude. Possible physical mechanisms responsible for the observed behavior,
including so-called “memory effects,” are discussed. 相似文献
7.
8.
A reference model is considered for a magnetic field intended for checking programs and algorithms defining the electromagnetic
field in an electromagnetic flowmeter measurement channel.
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Translated from Izmeritel’naya Tekhnika, No. 4, pp. 39–41, April, 2007. 相似文献
9.
A novel method for preparing a batch of silicate glasses containing crystalline quartz, glass formers, modifiers, intermediates, and auxiliary components, including the physicochemical activation of high-melting batch components with the use of alkali metal hydroxides, is developed. The optimal technological parameters are determined and the general scheme for obtaining an agglomerate by the proposed method is presented. It is found that moisturizing the activated components of a glass batch with a KOH solution having a minimal concentration of 0.5% strengthens the agglomerate of the glass batch in comparison with moisturizing by water. 相似文献
10.
V. A. Afanas’ev N. A. Bilyk A. F. Voskoboinik Yu. N. Kuzyaev K. L. Lavrov Yu. A. Pozdeev V. P. Khanin Yu. V. Khomutinin 《Chemical and Petroleum Engineering》2006,42(3-4):165-166
Brief tests of methods of reliability assessment and designing of tests of mechanical structures, applying static, impact,
heat, and vibration loads, including those based on a small volume of tests, are given. The methods are provided with PC software.
__________
Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, 42, No. 3, p. 39, March, 2006. 相似文献