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21.
Thierry Pinheiro Moreira Mauricio Lisboa Perez Rafael de Oliveira Werneck Eduardo Valle 《Multimedia Tools and Applications》2017,76(14):15325-15340
A pet that goes missing is among many people’s worst fears: a moment of distraction is enough for a dog or a cat wandering off from home. Some measures help matching lost animals to their owners; but automated visual recognition is one that — although convenient, highly available, and low-cost — is surprisingly overlooked. In this paper, we inaugurate that promising avenue by pursuing face recognition for dogs. We contrast four ready-to-use human facial recognizers (EigenFaces, FisherFaces, LBPH, and a Sparse method) to two original solutions based upon convolutional neural networks: BARK (inspired in architecture-optimized networks employed for human facial recognition) and WOOF (based upon off-the-shelf OverFeat features). Human facial recognizers perform poorly for dogs (up to 60.5 % accuracy), showing that dog facial recognition is not a trivial extension of human facial recognition. The convolutional network solutions work much better, with BARK attaining up to 81.1 % accuracy, and WOOF, 89.4 %. The tests were conducted in two datasets: Flickr-dog, with 42 dogs of two breeds (pugs and huskies); and Snoopybook, with 18 mongrel dogs. 相似文献
22.
Willian Tsuyoshi Kume Eslaine Patrícia de Jesus Porto Elaine Cristina de Lara Spada Douglas Ramalho Lisboa Fernando Ferrari Frutuoso Stachack Ailton José Terezo Thaís Hernandes Katiuchia Pereira Takeuchi Maísa Pavani dos Santos Elias Bibiana Mozzaquatro Gai Nair Honda Kawashita Suélem Aparecida de França Lemes 《Journal of Food Biochemistry》2021,45(8):e13834
23.
24.
Within the Bayesian approach to the training of multi-layer perceptrons for classification problems, the interpretation of
the outputs as posterior probabilities of class-membership requires us to integrate out (marginalise) the network function
over the distribution of network weights. MacKay [1] suggests an approximation of such an analytically intractable integral,
in which the integration is over the network output preactivations. The network predictions can be over-optimistic if this
process of marginalisation is ignored. This study attempts to assess the effect of marginalisation, with the approximation
mentioned above, on two Bayesian neural network models: one with a single regularisation term; and another giving way to a
process known as Automatic Relevance Determination (ARD), with multiple regularisation terms. A real-world classification problem, concerning the discrimination of online purchasers
and non-purchasers using Internet’s WWW users’ opinions, is the test-bed for this assessment. 相似文献
25.
Liana Barachisio Lisboa Vinicius Cardoso Garcia Daniel Lucrédio Eduardo Santana de Almeida Silvio Romero de Lemos Meira Renata Pontin de Mattos Fortes 《Information and Software Technology》2010,52(1):1-13
The domain analysis process is used to identify and document common and variable characteristics of systems in a specific domain. In order to achieve an effective result, it is necessary to collect, organize and analyze several sources of information about different applications in this domain. Consequently, this process involves distinct phases and activities and also needs to identify which artifacts, arising from these activities, have to be traceable and consistent. In this context, performing a domain analysis process without tool support increases the risks of failure, but the used tool should support the complete process and not just a part of it. This article presents a systematic review of domain analysis tools that aims at finding out how the available tools offer support to the process. As a result, the review identified that these tools are usually focused on supporting only one process and there are still gaps in the complete process support. Furthermore, the results can provide insights for new research in the domain engineering area for investigating and defining new tools, and the study also aids in the identification of companies’ needs for a domain analysis tool. 相似文献
26.
Anti‐obesogenic effects of calcium prevent changes in the GLP‐1 profile in adult rats primed by early weaning 下载免费PDF全文
27.
Lismeri Wuicik Merfort Mateus de Oliveira Lisboa Luciane Regina Cavalli Carmem Maria Sales Bonfim 《International journal of molecular sciences》2022,23(22)
Fanconi Anemia (FA) is a disease characterized by genomic instability, increased sensitivity to DNA cross-linking agents, and the presence of clonal chromosomal abnormalities. This genomic instability can compromise the bone marrow (BM) and confer a high cancer risk to the patients, particularly in the development of Myelodysplastic Syndrome (MDS) and Acute Myeloid Leukemia (AML). The diagnosis of FA patients is complex and cannot be based only on clinical features at presentation. The gold standard diagnostic assay for these patients is cytogenetic analysis, revealing chromosomal breaks induced by DNA cross-linking agents. Clonal chromosome abnormalities, such as the ones involving chromosomes 1q, 3q, and 7, are also common features in FA patients and are associated with progressive BM failure and/or a pre-leukemia condition. In this review, we discuss the cytogenetic methods and their application in diagnosis, stratification of the patients into distinct prognostic groups, and the clinical follow-up of FA patients. These methods have been invaluable for the understanding of FA pathogenesis and identifying novel disease biomarkers. Additional evidence is required to determine the association of these biomarkers with prognosis and cancer risk, and their potential as druggable targets for FA therapy. 相似文献
28.
A cholesterol-rich nanoemulsion (LDE) that mimics the composition of low-density lipoprotein (LDL) acquires apoE in the plasma
and is taken-up by the cells by LDL receptors. In this study, to verify whether free cholesterol (FC) and the cholesteryl
ester (CE) components of LDL are taken-up differently by the vessels. LDE labeled with 3H-cholesterol and 14C-cholesteryl oleate was injected into 20 coronary artery disease patients 24 h before a scheduled myocardial coronary artery
bypass grafting. The plasma kinetics of both radiolabels was determined from plasma samples collected over 24 h, and fragments
of vessels discarded during surgery were collected and analyzed for radioactivity. LDE FC was removed faster than CE. The
radioactive counting of LDE CE was greater than that of LDE FC in the blood, but the uptake of FC was markedly greater than
that of CE in all fragments: fivefold greater in the aorta (p = 0.04), fourfold greater in the internal thoracic artery (p = 0.03), tenfold greater in the saphenous vein (p = 0.01) and threefold in the radial artery (p = 0.05). In conclusion, the greater removal from plasma of FC compared with CE and the remarkably greater vessel tissue uptake
of FC compared with CE suggests that, in the plasma, FC dissociates from the nanoemulsion particles and precipitates in the
vessels. Considering LDE as an artificial nanoemulsion model for LDL, our results suggest that dissociation of FC from lipoprotein
particles and deposition in the vessel wall may play a role as an independent mechanism in atherogenesis. 相似文献
29.
Melo-Silveira RF Fidelis GP Costa MS Telles CB Dantas-Santos N de Oliveira Elias S Ribeiro VB Barth AL Macedo AJ Leite EL Rocha HA 《International journal of molecular sciences》2012,13(1):409-426
Xylan is one of most abundant polymer after cellulose. However, its potential has yet to be completely recognized. Corn cobs contain a considerable reservoir of xylan. The aim of this work was to study some of the biological activities of xylan obtained from corn cobs after alkaline extraction enhanced by ultrasonication. Physical chemistry and infrared analyses showed 130 kDa heteroxylan containing mainly xylose:arabinose: galactose:glucose (5.0:1.5:2.0:1.2). Xylan obtained exhibited total antioxidant activity corresponding to 48.5 mg of ascorbic acid equivalent/g of xylan. Furthermore, xylan displayed high ferric chelating activity (70%) at 2 mg/mL. Xylan also showed anticoagulant activity in aPTT test. In antimicrobial assay, the polysaccharide significantly inhibited bacterial growth of Klebsiella pneumoniae. In a test with normal and tumor human cells, after 72 h, only HeLa tumor cell proliferation was inhibited (p < 0.05) in a dose-dependent manner by xylan, reaching saturation at around 2 mg/mL, whereas 3T3 normal cell proliferation was not affected. The results suggest that it has potential clinical applications as antioxidant, anticoagulant, antimicrobial and antiproliferative compounds. 相似文献
30.
Marian Mazeto de Aro Amilton Cesar dos Santos Erick Eduardo da Silveira Antnio Francisco da Silva Lisboa Neto Moacir Franco de Oliveira Antnio Chaves de Assis Neto 《Microscopy research and technique》2019,82(6):696-708
This research describes for the first time the complete morphology of the digestive apparatus of rock cavies. Dissection, light microscopy, and scanning electron microscopy were performed. The oral cavity has: the hard palate without palatine wrinkles and the soft palate; the tongue composed by striated musculature, with presence of vallate, foliated, and fungiform papillae with taste buds and filiform papillae with mechanical function; and, 20 teeth of the hypsodonts type. Esophagus, stomach, small intestine (duodenum, jejunum, and ileum), and the large intestine (cecum, colon, and rectum) are found. The anus is present at the end of the alimentary channel. Organs of digestive tube are composed by four tunics: mucosa, submucosa, muscular, and serosa. The duodenum, jejunum and ileum have villi. Jejunum, ileum and cecum present Lieberkühn crypts. The cecum has mucous glands. Colon and rectum are folded and have goblet cells. Anus presents sebaceous glands. As associated glands it is found the liver with six lobes and gallbladder; a lobulated pancreas; and a pair of each major salivary gland (parotid, mandibular, and sublingual). Parotid glands have serous acini and mandibular and sublingual glands have mucous acini. Pancreas has adenomers. The liver has hepatocytes and portal vein, hepatic artery, and bile duct (portal triad), separated by sinusoids. It is concluded that the digestive apparatus of the rock cavy has variations in the dentition, lingual papillae, and acini of the salivary glands when compared to other rodents. Other variations refer to the well‐developed cecum characteristic of herbivorous behavior. 相似文献