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排序方式: 共有63条查询结果,搜索用时 15 毫秒
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Jarno Ralli Javier Díaz Sinan Kalkan Norbert Krüger Eduardo Ros 《Machine Vision and Applications》2012,23(1):65-77
We describe a method for resolving ambiguities in low-level disparity calculations in a stereo-vision scheme by using a recurrent
mechanism that we call signal-symbol loop. Due to the local nature of low-level processing it is not always possible to estimate
the correct disparity values produced at this level. Symbolic abstraction of the signal produces robust, high confidence,
multimodal image features which can be used to interpret the scene more accurately and therefore disambiguate low-level interpretations
by biasing the correct disparity. The fusion process is capable of producing more accurate dense disparity maps than the low-
and symbolic-level algorithms can produce independently. Therefore we describe an efficient fusion scheme that allows symbolic-
and low-level cues to complement each other, resulting in a more accurate and dense disparity representation of the scene. 相似文献
33.
Govindaraajan B. Yadhukulakrishnan Sriharsha KarumuriArif Rahman Raman P. SinghA. Kaan Kalkan Sandip P. Harimkar 《Ceramics International》2013
Spark plasma sintering (SPS) of monolithic ZrB2 ultra-high temperature ceramic and 2–6 vol% graphene nanoplates (GNPs) reinforced ZrB2 matrix composites is reported. The SPS at 1900 °C with a uni-axial pressure of 70 MPa and soaking time of 15 min resulted in near-full densification in ZrB2–GNP composites. Systematic investigations on the effect of GNP reinforcement on densification behavior, microstructure, and mechanical properties (microhardness, biaxial flexural strength, and indentation fracture toughness) of the composites are presented. Densification mechanisms, initiated by interfacial reactions, are also proposed based on detailed thermodynamic analysis of possible reactions at the sintering temperature and the analysis of in-process punch displacement profiles. The results show that GNPs can be retained in the ZrB2 matrix composites even with high SPS temperature of 1900 °C and cause toughening of the composites through a range of toughening mechanisms, including GNP pull-out, crack deflection, and crack bridging. 相似文献
34.
One of the most important textile materials, poly(ethylene terephthalate) (PET) fiber, was coated with a semi-conductive polyfuran (PFu) by in situ oxidative polymerization using FeCl3 oxidant in solvent mixture of acetonitrile–chloroform. The effects of polymerization conditions such as volume ratios of acetonitrile/chloroform, monomer concentration, and oxidant/monomer mol ratio were investigated on PFu content (%) of the composites. It was observed that pretreatment of PET in dichloromethane increased PFu content and its coating continuity before polymerization. The highest PFu content (12.0%) was obtained using FeCl3/furan mol ratios of 3.5 in acetonitrile/chloroform mixture (5/1). The density values of the composites with different PFu contents were measured. Composite fibers were also subjected to doping processes with HCl and I2 vapors, separately, and it was observed that the surface resistivity of PFu/PET (1012 Ω/cm2) reached to 53 Ω/cm2 after doping with I2. The structural, thermal, and morphological characterization was performed with FTIR, XRD, TGA, and SEM, respectively. 相似文献
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Hatice Kalkan Yıldırım Erhan Canbay Şahin Öztürk Ozan Aldemir Eser Y. Sözmen 《Food science and biotechnology》2018,27(6):1727-1733
Propolis is a natural product produced by honeybees. It has antioxidant effects as well as antimicrobial, antiseptic, antibacterial, anti-inflammatory and antimutagenic properties. Except these important healthy properties some cytotoxic effects causing allergies also have been reported. In this study have been evaluated changes of phenolic compounds including allergens molecules found in propolis. Before biotransformation, propolis samples were treated with different solvent (ethanol and polyethylene glycol) to facilitate solvation of solid samples. Biotransformation was done by three different strains of Lactobacillus plantarum (10, 8014, ATCC). Results demonstrated the importance of used solvent/treatment for extraction procedure and strains of L. plantrum. The lowest values of main allergens were determined as 321 ng/mL for BCAFE, 320 ng/mL for 1.1 DMAECAFE and 8.02 ng/mL for CAPE. The study is the first work deal with evaluation of bioconversion of propolis by different L. plantarum strains and their effects on phenolic profile. 相似文献
37.
Arkom Palamanit Angelique Musengimana Sugira Somchart Soponronnarit Somkiat Prachayawarakorn Patcharee Tungtrakul Fatih Kalkan 《Drying Technology》2020,38(4):420-433
AbstractThis study investigated the quality and drying kinetics of instant parboiled rice fortified with turmeric (IPRFT) by using hot air (HA) and microwave-assisted hot air (MWHA) drying. The cooked long grain parboiled rice (LGPR) fortified with turmeric was dried with HA at temperatures of 65, 80, 95, and 110?°C. The microwave power density of 0.588 Wg?1 was incorporated for drying with MWHA. Drying was performed until the dried IPRFT reached 16% (d.b.) of moisture content. The quality of the dried IPRFT was evaluated in terms of color, total phenolics content (TPC), total antioxidant capacity (TAC), rehydration ratio, volume expansion ratio, texture and microstructure. The results showed that the incorporation of microwave power with HA drying helped to reduce the drying time by 50% compared to conventional HA drying. A prediction of the moisture ratio by using the Page model provided the best R2 and RMSE in drying kinetics. The drying conditions had small effects on the color, TPC, TAC, and microstructure of the dried IPFRT. The rehydration ratio, volume expansion ratio and texture of the rehydrated IPFRT showed minimal variations from changes in the drying conditions. The TPC and TAC of the dried IPRFT clearly increased compared to the TPC and TAC of the initial LGPR. 相似文献
38.
Selin Kalkan 《Journal of Food Safety》2020,40(1):e12724
In this study, it was aimed to design the time-predicted inactivation model for various growth curves and the growth parameters representing the changes in the inactivation of Staphylococcus aureus in probiotic white cheese. For this purpose, S. aureus were inoculated in the pasteurized milk and the production of probiotic white cheese was performed in five different groups, and then samples were matured for 60 days at 4°C. S. aureus, Lactobacillus rhamnosus, Lactobacillus casei Shirota, and mesophilic starter culture levels of the samples were analyzed on the 1st, 4th, 7th, 10th, 15th, 30th, and 60th days of maturation. The inactivation model evaluation was performed by using the number of microorganisms counted with Fourier modeling method. In determining the model to be applied, the coefficient of determination (R2) and the sum of squared errors (SSE) for the mean number of microorganisms detected via modeling method were used. As conclusions, the number of S. aureus has decreased by approximately 5 logarithmic units at the end of the storage period by using probiotics together with the starter culture. It was determined that the Fourier modeling method is a suitable inactivation model with R2 values of 0.9847–0.9986 and SSE values of 0.094–0.510. 相似文献
39.
Linqi Zhang Sriharsha Karumuri S. Habib Alavi He Bai Sandip P. Harimkar A. Kaan Kalkan 《应用聚合物科学杂志》2019,136(24):47670
In this article, we report a photoprintable nanocomposite synthesized at room temperature in less than 10 s by aggressive mixing of two monomer solutions. Polycondensation occurs in the dispersed phase of the dynamic emulsion, microdroplets, in which the nanofillers are suspended. Hence, the synthesized composite microparticles have a high dispersion and high loading of nanofillers. Specifically, silver nanowire (AgNW)–nylon 66 blends with various Ag weight fractions are synthesized and studied. The poly(vinyl pyrrolidone) (PVP)-functionalized AgNWs (by polyol synthesis) are singly dispersed and tethered to the nylon matrix by PVP with a slight depression of the glass-transition temperature. The Ag–nylon powder melts under low-intensity visible continuous wave laser radiation; this allows convenient photoprinting of the nanocomposite structures. Photoprinting is demonstrated at a radiation intensity of 0.3 kW/cm2 (405 nm laser) and a scan rate of 5 mm/s for a 1.49 wt % Ag content. This enhanced photothermal characteristic of the nanocomposite, which allows printing at low radiation intensities, is attributed to the efficient coupling of light to the AgNW plasmon modes and the high dispersion of nanowires in the polymer. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47670. 相似文献
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