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1.
Saeed Javanmardi Mohammad Shojafar Shahdad Shariatmadari Jemal H. Abawajy Mukesh Singhal 《The Journal of supercomputing》2014,69(2):955-975
A web operating system is an operating system that users can access from any hardware at any location. A peer-to-peer (P2P) grid uses P2P communication for resource management and communication between nodes in a grid and manages resources locally in each cluster, and this provides a proper architecture for a web operating system. Use of semantic technology in web operating systems is an emerging field that improves the management and discovery of resources and services. In this paper, we propose PGSW-OS (P2P grid semantic Web OS), a model based on a P2P grid architecture and semantic technology to improve resource management in a web operating system through resource discovery with the aid of semantic features. Our approach integrates distributed hash tables (DHTs) and semantic overlay networks to enable semantic-based resource management by advertising resources in the DHT based upon their annotations to enable semantic-based resource matchmaking. Our model includes ontologies and virtual organizations. Our technique decreases the computational complexity of searching in a web operating system environment. We perform a simulation study using the Gridsim simulator, and our experiments show that our model provides enhanced utilization of resources, better search expressiveness, scalability, and precision. 相似文献
2.
In this work, the effects of three ionic liquids(ILs), namely, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium dicyanamide and tetraethyl-ammonium chloride, on methane hydrate formation and dissociation kinetic parameters were studied. The kinetic parameters including the initial rate of hydrate formation, hydrate stability at atmospheric pressure and hydrate storage capacity were evaluated. The experimental measurements were performed in an initial pressure range of 3.5-7.1 MPa. It was found that both of ILs with imidazolium-based cation increase the initial methane hydrate formation rate while the IL with ammonium-based cation leads to a decrease in the initial methane hydrate formation rate. It was also interpreted from the results that all of the three studied ILs decrease methane hydrate stability at atmospheric pressure and increase methane hydrate storage capacity. Finally, both of ILs with imidazolium-based cations were found to have higher impacts on decreasing hydrate stability at atmospheric pressure and increasing the methane hydrate storage capacity than the applied IL with ammonium-based cation. 相似文献
3.
Javanmardi F. Wakabayashi G. Minuchehr A. Zolfaghari A. Rashid M.M. Matoba M. 《IEEE transactions on nuclear science》2001,48(6):2321-2323
Readout responses for the inclined strips in position-sensitive detectors have been studied using theoretical predictions and experimental results. Inclined strips are almost along the displacement direction of incident particles. Rotating conventional strips to near horizontal strips decreases the number of strips by a tangential factor for long-length position sensing. In addition to the channel reduction, the inclined strips modify about 10% in the readout linearity compared to the long-length zigzag patterns. There is resolution degradation because of the inherent high sensitivity of these strips to the avalanche size (about 8% of the detector full length). Double peak responses were observed for sensing the positions of the incident particles. Our theoretical predictions and experimental results are discussed in this paper 相似文献
4.
In this work, the effects of three ionic liquids (ILs), namely, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium dicyanamide and tetraethyl-ammonium chloride, on methane hydrate formation and dissociation kinetic parameters were studied. The kinetic parameters including the initial rate of hydrate formation, hydrate stability at atmospheric pressure and hydrate storage capacity were evaluated. The experimental measurements were performed in an initial pressure range of 3.5–7.1 MPa. It was found that both of ILs with imidazolium-based cation increase the initial methane hydrate formation rate while the IL with ammonium-based cation leads to a decrease in the initial methane hydrate formation rate. It was also interpreted from the results that all of the three studied ILs decrease methane hydrate stability at atmospheric pressure and increase methane hydrate storage capacity. Finally, both of ILs with imidazolium-based cations were found to have higher impacts on decreasing hydrate stability at atmospheric pressure and increasing the methane hydrate storage capacity than the applied IL with ammonium-based cation. 相似文献
5.
Javanmardi Abdol Karim Yaghoubyan S. Hadi BagheriFard Karamollah Nejatian Samad Parvin Hamid 《The Journal of supercomputing》2021,77(6):5289-5318
The Journal of Supercomputing - Job scheduling in Hadoop has been thus far investigated in several studies. However, some challenges including minimum share (min-share), heterogeneous cluster,... 相似文献
6.
In this article a numerical solution of non-isothermal helical flow for the thermodependent Herschel-Bulkley fluids has been presented. The consistency term (μ0) in comparison to other properties is more temperature dependent; therefore an exponential function in the form of μ0 = exp(-bT) is considered. The governing equations are solved for two different physical situations; constant temperature walls and for a case of constant heat flux using the implicit finite difference method. The results from numerical solution are compared with results of first law of thermodynamics and a good agreement is noticed. 相似文献
7.
Hevea leaf boundary identification based on morphological transformation and edge detection 总被引:1,自引:0,他引:1
S.?T.?AnjomshoaeEmail author M.?S.?M. Rahim A.?Javanmardi 《Pattern Recognition and Image Analysis》2015,25(2):291-294
Hevea (Rubber tree) leaf characteristics have not been utilized yet for automation systems to classify different clones. However rubber tree leaves have some features that can be used to differentiate the clones. The rubber tree leaf is in the class of palmate leaves which means three leaflets are joined at one mutual base. This unique feature gives different positions of the leaflets whether the leaves are overlapping or separated that it can distinguish a particular clone from all other clones. This paper focuses on the position of leaflets in order to identify leaf boundaries. The proposed framework is producing satisfactory results to identify the rubber tree leaf boundaries. 相似文献
8.
Javanmardi Abdol Karim Yaghoubyan S. Hadi Bagherifard Karamollah Nejatian Samad Parvin Hamid 《The Journal of supercomputing》2021,77(1):1-22
The Journal of Supercomputing - A significant amount of research in the field of job scheduling is carried out in Hadoop. However, there is still need for research to overcome some challenges... 相似文献
9.
A new thermodynamic model for calculating the hydrate formation temperature of different hydrate formers in aqueous solutions of both electrolytes and a single alcohol has been presented. This method uses a generalization of the Aasberg‐Petersen model for water activity. For calculation of water activity in the presence of electrolytes, the effect of alcohols was taken into account without using any new fitting parameters. The results are in good agreement with published experimental data. Calculated values of the hydrate formation temperature in the presence of alcohols and electrolytes are compared with those obtained by other existing models. The average absolute error of hydrate formation temperature for 524 available experimental data points is about 0.87 K. 相似文献
10.
Shima Jafarzadeh Khadije Abdolmaleki Fardin Javanmardi Milad Hadidi Amin Mousavi Khaneghah 《International Journal of Food Science & Technology》2022,57(4):2159-2170
There are numerous strategies to control the growth of mycotoxigenic fungi and reduce mycotoxins in food, including physical, chemical and biological treatments. However, consumers prefer organic food and natural inhibitors because they are biodegradable and safe for human and animal health. This review summarises the current advances in plant-based compounds to mitigate contamination of food products by mycotoxigenic fungi and their toxins. In addition, a clear understanding of the roles of plant-based extracts in food products, their mechanisms of action and challenges and perspectives in mycotoxin degradation are presented. Essential oils and plant-based extracts are complex mixtures of major and minor chemical compounds with antimicrobial and antioxidant properties. In general, the mechanisms of antifungal activity of plant-based compounds are attributed to the reduction of the ergosterol content, disruption of cell membrane integrity, enhancing of membrane ion leakage and permeability, disruption to the organisation of mitochondrial structure, interference in enzymatic reactions of cell wall synthesis, disturbance of oxidative balance, inhibition of carbohydrate metabolism, suppression of mycotoxin biosynthetic genes and alterations in the molecular structure of mycotoxins. 相似文献