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排序方式: 共有82条查询结果,搜索用时 31 毫秒
1.
Organic polymers were extracted from okra, aloe vera, and hibiscus leaves and used as drag‐reducing additives (DRAs) to enhance the laminar flow in custom‐made microchannels that simulate the human brain vessels. The experiment was conducted using an open‐loop microfluidic system. The flow enhancement performance was evaluated as the function of percentage of flow increment of mucilage additives at different concentrations. Okra mucilage showed greater flow enhancement performance at higher mucilage concentration while both aloe vera and hibiscus mucilage performed better at lower additive concentration. The findings prove the potential of these organic polymers as DRAs to enhance the blood flow. 相似文献
2.
Sauleh Eetemadi William Lewis Kristina Toutanova Hayder Radha 《Machine Translation》2015,29(3-4):189-223
Statistical machine translation has seen significant improvements in quality over the past several years. The single biggest factor in this improvement has been the accumulation of ever larger stores of data. We now find ourselves, however, the victims of our own success, in that it has become increasingly difficult to train on such large sets of data, due to limitations in memory, processing power, and ultimately, speed (i.e. data-to-models takes an inordinate amount of time). Moreover, the training data has a wide quality spectrum. A variety of methods for data cleaning and data selection have been developed to address these issues. Each of these methods employs a search or filtering algorithm to select a subset of the data, given a defined set of feature functions. In this paper we provide a comparative overview of research in this area based on application scenario, feature functions and search method. 相似文献
3.
Abbas Suhad Kareem Hassan Zainab M. Mihsen Hayder Hamied Eesa Mohammed T. Attol Duha Hussien 《SILICON》2020,12(5):1103-1110
Silicon - The silica-ortho-phenylenediamine(RHAOPDA) derived from Rice Husk Ash and o- phenylenediamine (OPDA) were synthesized. The prepared material was characterized by different techniques; N2-... 相似文献
4.
Liezhou Zhong Hayder Ali Zhongxiang Fang Mark L. Wahlqvist Jonathan M. Hodgson Stuart K. Johnson 《International Journal of Food Science & Technology》2020,55(4):1816-1824
The high proportion of seed coat of legume lupins results in big milling lose during kernel flour production, though the seed coat could be value-added as human food. The physicochemical and nutritional properties and antioxidant capacities of seed coats of six Australian sweet lupin cultivars grown at two locations were evaluated. Results showed that genotype, environment and their interaction were significant for seed coat percentage, proximate composition, dietary fibre content, polyphenols and antioxidant capacities. Strong correlations between seed coat lightness and polyphenol content were found. A comparison using multivariate analysis of the seed coat properties showed clear separation based on growing sites. This study indicates the enormous potential of Australian sweet lupin seed coat as an ‘antioxidant dietary fibre’ food source. The results could also benefit to breed varieties with desirable levels of nutrients and phytochemicals. 相似文献
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Mrityunjay Kumar David D. Conger Rodney L. Miller Jiebo Luo Hayder Radha 《Journal of Signal Processing Systems》2011,65(2):159-169
As displays become less expensive and are incorporated into more and more devices, there has been an increased focus on image
resizing techniques to fill an image to an arbitrary screen size. Traditional methods such as cropping or resampling can introduce undesirable losses in information or distortion in perception. Recently, content-aware image retargeting methods
have been proposed (Avidan and Shamir, ACM Trans Graphics 26(3), 2007; Guo et al., IEEE Trans Multimedia 11(5):856–867, 2009; Shamir and Avidan, Commun ACM 52(1), 2009; Simakov et al. 2008; Wolf et al. 2007), which produce exceptional results. In particular, seam carving, proposed by Avidan and Shamir, has gained attention as
an effective solution. However, there are many cases where it can fail. In this paper we propose a distortion-sensitive seam
carving algorithm for content-aware image resizing that improves edge preservation and decreases aliasing artifacts. In the
proposed approach, we use local gradient information along with a thresholding technique to guide the seam selection process
and provide a mechanism to halt seam carving when further processing would introduce unacceptable visual distortion in the
resized image. Furthermore, anti-aliasing filter is used to reduce the aliasing artifacts caused by seam removal. Experiments
have demonstrated superior performance over the current seam carving methods. 相似文献
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Three competing schemes have been proposed for multimedia transport over broadband wireless channels: (a) traditional UDP
(Postel, The User Datagram Protocol, 1980 [1]), (b) semi-cross-layer UDP-Lite (The Lightweight User Datagram Protocol, 2004
[2]), and (c) cross-layer header estimation (Khayam et al., IEEE Transactions on Multimedia 9(2):377–385, 2007 [3]; Khayam
and Radha, IEEE Transactions on Wireless Communications 6(11):3946–3954, 2007 [4]). In all these schemes, corrupted and lost
packets are recovered using FEC at the application layer. In this paper, we analytically and experimentally compare the performances
of these broadband wireless multimedia schemes. First, we derive lower bounds on the excepted FEC redundancy required by ideal
cross-layer header estimation, UDP and UDP-Lite over an arbitrary-order Markov wireless channel. We show that under realistic
wireless channel conditions, the cross-layer header estimation scheme always requires lesser redundancy than UDP and UDP-Lite.
We then propose a practical minimum distance decoding (MDD) header estimation scheme, which is receiver-based, low complexity
and highly accurate. Trace-driven multimedia experiments over wireless LANs demonstrate that MDD header estimation requires
significantly lesser FEC redundancy and renders better video quality than existing schemes. 相似文献
10.
The second order differential equation of interface shear is formulated for fiber-reinforced polymer-strengthened beams using beam theory with a shear deformable adhesive layer. The solution of the boundary value problem is obtained in closed form and is used to derive deflection expressions for different loading conditions. The solution is also extended to analyze partially plated beams. The results converge to the extreme cases of very poorly and perfectly bonded plates and they help identify values of the adhesive shear modulus for effective stiffening. Furthermore, the solution of partially plated beams aids in defining anchorage lengths needed to develop the full or the highest possible composite action at midspan. 相似文献