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排序方式: 共有198条查询结果,搜索用时 16 毫秒
41.
42.
Appavu alias Balamurugan Ramasamy Rajaram S. Pramala S. Rajalakshmi C. Jeyendran J. Dinesh Surya Prakash 《Knowledge》2011,24(5):563-569
A novel algorithm named NB+ which is an extended version of the traditional Naïve Bayesian algorithm has been presented in this paper. An exception occurs when there is an equal probability for the class label value in the Naïve Bayesian algorithm. The approach aims to suggest a solution with the help of a partial matching method. Consequently, the classification accuracy has drastically improved. Experimental evaluation has been done on various databases to show that NB+ algorithm outperforms the traditional Naïve Bayesian algorithm. 相似文献
43.
In this experimental investigation, an attempt was made to increase the performance and reduce the emission by adding alkanes such as n-pentane and n-hexane separately at different proportions, such as 4%, 6% and 8% by volume, with diesel. The performance analysis reported that, at full load, the brake thermal efficiency was increased by 3.605%, 3.170%, 4.305%, 4.394%, 5.336% and 6.173% for the blending of 4% n-pentane, 6% n-pentane, 8% n-pentane, 4% n-hexane, 6% n-hexane and 8% n-hexane with diesel, respectively. The emission test concluded that the smoke density was increased by 9.915%, 9.905%, 6.325%, 9.573%, 6.154% and 5.983% for the blending of 4% n-pentane, 6% n-pentane, 8% n-pentane, 4% n-hexane, 6% n-hexane and 8% n-hexane with diesel, respectively. The NOx emission was decreased by 8.265%, 8.674%, 17.430%, 5.401%, 5.810% and 7.529% for the blending of 4% n-pentane, 6% n-pentane, 8% n-pentane, 4% n-hexane, 6% n-hexane and 8% n-hexane with diesel, respectively. 相似文献
44.
R. Balamurugan C. V. Ramakrishnan N. Swaminathan 《Structural and Multidisciplinary Optimization》2011,43(3):381-404
This paper introduces a set of skeleton operators for characterizing topologies evolving in a bit-array represented structural
topology optimization problem. It is shown that the design generally converges to a stable skeleton fairly early in the optimization
process. It is observed that further optimization is more about finding optimal gross shape for the various branches of the
converged skeleton and the bit-array representation is not appropriate. A two-phase approach to topology optimization is proposed
in which the first phase, where bit-array is used to represent the topology, ends with the detection of stabilization of skeleton,
and the second phase proceeds further with the geometry based representation that directly addresses gross variation in shape
of the branches of the converged skeleton. Genetic Algorithm has been used for optimization in both the phases. The efficiency
and effectiveness of the use of skeleton operators and geometric variables for identification of convergence in the first
phase and optimization in the second phase respectively is demonstrated. 相似文献
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46.
Photoisomerization behavior of bisbenzylideneacetone/cycloheptanone and 1,3,4‐oxadiazole containing nematic liquid crystalline polyesters under UV irradiation was investigated. Solubility, carbonyl group absorption band in FTIR, optical microscopy observation, as well as DSC analysis through existence of liquid crystallinity after irradiation were proved this phenomenon. Fluorescence spectra revealed blue‐emission maxima with Stokes shift in the range of 46–49 nm. Band gap energy calculated from absorption spectra are in the range of 3.18–3.41 eV. Structure–property relationships were probed by correlating the spacer length with development of mesophase formation, thermal, and optical properties. Optical property of polymers disclosed photoisomerization processes. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
47.
Titanium and its alloys are widely used as materials for implants, owing to their corrosion resistance, mechanical properties and excellent biocompatibility. However, clinical experience has shown that they are susceptible to localised corrosion in the human body causing the release of metal ions into the tissues surrounding the implants. Several incidences of clinical failures of such devices have demanded the application of biocompatible and corrosion resistant coatings and surface modification of the alloys. Coating metallic implants with bioactive materials is necessary to establish good interfacial bonds between the metal substrate and the bone. Hence, this work aimed at developing a bioglass-apatite (BG-HAP) graded coating on Ti6Al4V titanium alloy through electrophoretic deposition (EPD) technique. The coatings were characterized for their properties such as structural, electrochemical and mechanical stability. The electrochemical corrosion parameters such as corrosion potential (Ecorr) (open circuit potential) and corrosion current density (Icorr) evaluated in simulated body fluid (SBF) have shown significant shifts towards noble direction for the graded bioglass-apatite coated specimens in comparison with uncoated Ti6Al4V alloy. Electrochemical impedance spectroscopic investigations revealed higher polarisation resistance and lower capacitance values for the coated specimens, evidencing the stable nature of the formed coatings. The results obtained in the present work demonstrate the suitability of the electrophoretic technique for the preparation of graded coating on Ti6Al4V substrates. 相似文献
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50.
Balasubramanian Vigneshkumar Srinivasan Radhakrishnan Krishnaswamy Balamurugan 《Lipids》2014,49(6):555-575
Lipopolysaccharide (LPS) is the main surface constituent of Gram-negative bacteria. Lipid A, the hydrophobic moiety, outer monolayer of the outer cell membrane forms the major component of LPS. Immunogenic Lipid A is recognized by the innate immune system through the TLR 4/MD-2 complex. Pseudomonas aeruginosa PAO1, a Gram-negative bacterium is known to cause nosocomial infection and known for its adaptation to adverse environmental conditions. Pseudomonas aeruginosa can infect a broad host spectrum including Caenorhabditis elegans, a simple free living soil nematode. Here, we reveal that PAO1 modifies its Lipid A during the host interaction with C. elegans. The penta-acylated form of Lipid A was identified by using matrix assisted laser desorption ionization–time of flight analysis and the β-(1,6)-linked disaccharide of glucosamine with phosphate groups, 2 and 2′ amide linked fatty acid chain and 3 and 3′ ester linked fatty acids were investigated for the modification using the non destructive 1H NMR, spin–lattice (T 1) relaxation measurement, differential scanning calorimetry. T 1 relaxation measurements showed that the 2 and 2′ amide linked fatty acid chain, –CH in the glucosamine disaccharide of PAO1 lipid A, in an exposed host had a different spin lattice relaxation time compared to an unexposed host and the findings were reconfirmed using in vitro human corneal epithelial cells cell lines. Furthermore, scanning electron microscope and confocal laser scanning microscopy analysis revealed that the P. aeruginosa PAO1 biofilm formation was disturbed in the exposed host condition. The daf-12, daf-16, tol-1, pmk-1, ins-7 and ilys3 immune genes of C. elegans were examined with live bacterial and isolated lipid moiety infection and the expression was found to be highly specific. Overall, the present study revealed that PAO1 modified its 2 and 2′ amide linked fatty acid chain in the lipid A of PAO1 LPS during the exposed host condition. 相似文献