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1.
N S Sergeeva M Iu Vasil'ev T I Kovalenko N V Sokolova G I Avdeev 《Eksperimental?nai?a onkologii?a》1989,11(2):35-37
The indirect immunofluorescent technique was used to study the distribution of the ascitic fluid antigen (AgD) on histological sections from surgical specimens of gastric and colon tumours from proximal to distal lines of resection. AgD was found in gastric tumours exceptionally in the tumour area and in colon cancer--both in the tumour stroma and in surrounding histologically normal mucosa. 相似文献
2.
Shatilov O. F. Kniss V. A. Avdeev A. S. Datsko A. N. Puchkov I. Yu. 《Refractories and Industrial Ceramics》2002,43(1-2):79-80
Improvements in operational performance of the refractory lining of a direct-current electric furnace for cobalt smelting achieved at the Ufaleinikel Joint-Stock Co. in collaboration with the Kombinat Magnezit Joint-Stock Co. are reported. 相似文献
3.
For metal-insulator-semiconductor structures, a technique is described of analyzing the normalized conductance measured as a function of frequency with regard to the random variation of surface potential and the presence of electrically active states inside the insulator. Parameters are selected that are to be used in evaluating the amount by which the conductance-frequency characteristic is broadened. Analytical expressions are derived for the parameters. A method is proposed for separating the respective contributions of the tunneling and fluctuation mechanisms of the broadening. It enables one to evaluate the depth of the electrically active states and the variance of the surface potential when the two factors make comparable contributions to the inhomogeneity of the insulator-semiconductor interface. 相似文献
4.
5.
The electrochemical interaction of acetylene compounds, both with and without -hydrogen, with iron in hydrochloric and sulfuric acids was investigated by potentiostatic voltammetry on a rotating disk electrode and capacitance measurements on a stationary electrode. The tendency of acetylene compounds to electrochemical reduction correlates with their ability to polymerize on iron in acidic solutions. The presence of -hydrogen atom determines the ability of an acetylene compound to polymerize on iron, thus inducing the secondary inhibition. The compound containing no -hydrogen manifests only adsorption mechanism. 相似文献
6.
7.
N. E. Sorokina N. V. Maksimova A. V. Nikitin O. N. Shornikova V. V. Avdeev 《Inorganic Materials》2001,37(6):584-590
The highly oriented pyrolytic graphite–HNO3–H3PO4system was studied by x-ray diffraction and potentiometry at different acid concentrations. The results demonstrate that chemical and electrochemical intercalation in the graphite–98% HNO3–85% H3PO4system yields graphite nitrate, a binary graphite intercalation compound (GIC). H3PO4is shown to have an ambiguous effect on the concentration ranges of different stages of graphite nitrate, shifting them to lower HNO3concentrations as compared to the graphite–HNO3–H2O system. In the graphite–98% HNO3–100% H3PO4system, a stage II ternary GIC is obtained, with an intercalate layer thickness d
i 4.7 Å. Stages II–VI of this GIC were prepared via exchange reaction between graphite nitrate and 100% H3PO4. A mechanism for the formation of the ternary GIC is proposed. The synthesis of the cointercalated GIC is likely to involve two steps: in the first step, graphite nitrate is formed; subsequent reaction in the intercalate layer leads to partial replacement of solvated HNO3by H3PO4molecules. 相似文献
8.
A theoretical evaluation of the potential application of a device with inclined plane for determining the dynamic coefficient
of friction is given. Structural changes in the device that make it possible to increase its precision are proposed. Computational
equations for estimating the resolution of the device are presented.
__________
Translated from Izmeritel’naya Tekhnika, No. 11, pp. 24–26, November, 2007. 相似文献
9.
V. Bidoli M. Casolino G. Furano L. Narici A. Morselli M. P. De Pascale P. Picozza E. Reali R. Sparvoli W. G. Sannita A. M. Gal''per N. R. Vavilov M. G. Korotkov A. V. Popov Yu. V. Ozerov A. M. Khodarovich S. V. Avdeev W. Bonvicini A. Vacchi N. Zampa G. Mazzenga M. Ricci P. Spillantini G. Castellini M. Boezio P. Carlson C. Fuglesang 《Instruments and Experimental Techniques》2001,44(5):623-625
An algorithm for reconstructing the characteristics (charge, mass, and energy) of cosmic-radiation nuclei with 20- to 200-MeV/nucleon energies is described. The detector is a telescope of three two-coordinate planes with two 1-mm-thick iron filters inserted between them. Each plane is composed of two strip silicon detectors with 3.6-mm-wide orthogonally oriented strips, an effective area of 6 × 6 cm2, and a thickness of 380 m. The algorithm for reconstructing the nuclei characteristics is based on the analysis of how the specific ionization losses change as the nuclei pass through the filter material. The results of the Monte Carlo simulation are presented for the energy dependence of the telescope acceptance and the energy deposited in the detectors by different nuclei in view of the detector calibration on the nuclear beams of the accelerator. The mass resolution of the telescope is 30, 12, and 5% for He, N, and Al nuclei, respectively. The energy resolution, which is 20%, is much the same for all nuclei. 相似文献
10.