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排序方式: 共有76条查询结果,搜索用时 15 毫秒
1.
Rapid depletion of fossil fuel and continuous increase in gasoline prices have stimulated the search of alternative fuels. This paper deals with the prediction of engine performance, emission and combustion characteristics of compression ignition engine fuelled with fish oil biodiesel using artificial neural network (ANN). Experimental investigations are carried out in a single cylinder constant speed direct injection diesel engine under variable load conditions at different injection timings?210, 240 and 270 bTDC. The performance, combustion and emission characteristics are measured using an exhaust gas analyser, smoke meter, piezoelectric pressure transducer and crank angle encoder for different fuel blends and engine load conditions. For training the neural network, feed-forward back propagation algorithm is used. The developed ANN model predicts the performance, combustions and exhaust emissions with a correlation coefficients (R) of 0.97–0.99 and a mean relative error of 0.62–4.826%. The root mean square errors are found to be low. The developed model has found to predict accurately the engine performance, combustion and emission parameters at different injection timings. 相似文献
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M. Shridhar M. Ahmadi M. El-Gabali 《Journal of Visual Communication and Image Representation》1992,3(4)
The main theme of this paper is the derivation of a new algorithm for restoring digitized images degraded by both additive and multiplicative noise sources. In order to keep the derivation sufficiently general, the authors also include degradation caused by blur and a class of nonlinearities. The images under consideration are modeled as Markov random fields, while the additive and multiplicative noise sources are assumed to be Gaussian processes with known means and variances. Blurring of images is accomplished by a shift-invariant point-spread function. Test results with degraded images indicate that the algorithm is effective in restoring images degraded by high levels of additive and multiplicative noise. 相似文献
4.
Zhang Q Willison LN Tripathi P Sathe SK Roux KH Emmett MR Blakney GT Zhang HM Marshall AG 《Analytical chemistry》2011,83(18):7129-7136
The epitopes of a homohexameric food allergen protein, cashew Ana o 2, identified by two monoclonal antibodies, 2B5 and 1F5, were mapped by solution-phase amide backbone H/D exchange (HDX) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) and the results were compared to previous mapping by immunological and mutational analyses. Antibody 2B5 defines a conformational epitope, and 1F5 defines a linear epitope. Intact murine IgG antibodies were incubated with recombinant Ana o 2 (rAna o 2) to form antigen-monoclonal antibody (Ag-mAb) complexes. mAb-complexed and uncomplexed (free) rAna o 2 were then subjected to HDX. HDX instrumentation and automation were optimized to achieve high sequence coverage by protease XIII digestion. The regions protected from H/D exchange upon antibody binding overlap and thus confirm the previously identified epitope-bearing segments: the first extension of HDX monitored by mass spectrometry to a full-length antigen-antibody complex in solution. 相似文献
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Safari R. Narasimhamurthi N. Shridhar M. Ahmadi M. 《IEEE transactions on image processing》1997,6(9):1337-1341
A technique for extracting filled-in information in form documents is presented. The transformation that is required to convert a filled-in form to match the master (blank form) is derived using results from projective geometry. Experimental studies with several forms indicate the proposed technique to be accurate and robust. 相似文献
6.
V Shridhar S Rivard X Wang R Shridhar C Paisley C Mullins L Beirnat M Dugan F Sarkar OJ Miller VK Vaitkevicius DI Smith 《Canadian Metallurgical Quarterly》1997,14(18):2213-2216
The ARP gene encodes a highly conserved arginine-rich protein from chromosomal band 3p21.1. At the cytogenetic level this region is frequently deleted in a variety of different solid tumors, although not in pancreatic cancer. We have reported the presence of a specific mutation (ATG50-->AGG) or deletion of codon 50 of the ARP gene in different tumor types (Shridhar et al., 1996, 1996a). In the present study, we have observed mutations involving codon 50 in 11 of 37 pancreatic tumors. The frequency of codon 50 mutation is roughly the same in pancreatic tumors as in the other types of tumors previously examined. In addition, we have detected mutations at codon 51 in multiple PCR subclones in two other pancreatic tumors. Mutations in the ARP gene are thus commonly observed in pancreatic cancer, as well as many other cancers. 相似文献
7.
Improvements of voltage regulation characteristics of self-excited induction generators (SEIGs) are investigated. Typical results of the sensitivity studies performed are presented and conclusions are drawn to suggest guidelines for design of such generators 相似文献
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Wireless Networks - Recently, the routing protocol for low power and lossy networks (RPL) was standardized and is considered as the default standard for routing over the low power and lossy... 相似文献
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Nono Jean Hubert ;Bikele Mama Desire ;Ghogomu Numbonui Julius ;Younang Elie ;Mbaze Meva'a Luc Leonard ;Lissouck Daniel ;Zobo Mfomo Joseph ;Shridhar Ramchandra Gadre 《化学与化工:英文版》2014,(12):1109-1124
In this article, we have performed B3LYP/6-31+G(d) calculations of geometrical and reaction enthalpies of antioxidant mechanisms for ADPHT 1-4 (3-alkyl-4-phenylacetylamino-lH-1,2,4-triazol-5-ones) and its derivatives: HAT (hydrogen atom transfer), SET-PT (single electron transfer-proton transfer) and SPLET (sequential proton-loss electron transfer) were investigated in gas and solution-phases. Solvent contribution to enthalpies was computed employing integral equation formalism IEF-PCM (integral equation formalism method) method. It turned out that the lowest BDEs (bond dissociation energies) is obtained for C-H bonds due to captodative effect in various media. Results indicate that HAT mechanism represents the most anticipated process in gas-phase from thermodynamic point of view. But, the SPLET represents the thermodynamically preferred reaction pathway in solvents (2-propanol, acetonitrile, DMF (N,N-dimethylformamide) and water). The authors showed that bond dissociation energies, IP (ionization potential) and PA (proton affinity) are sufficient to evaluate the thermodynamically preferred mechanism. 相似文献