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71.
Ghinwa El Hajj Sleiman Isabelle Petit Nadine Allanic Sofiane Belhabib Yannick Madec Rmi Deterre 《Polymer Engineering and Science》2019,59(Z2):E387-E396
In this work, Einstein's equation is extended considering a power‐law suspending fluid without any Newtonian approximation. To validate the developed equation, an experimental setup is carried out. Polypropylene (PP) and polyethylene (PE) are injected at different volume fractions. The pressure drops measured in a cylindrical die are analyzed. The results show that the developed relationship allows better prediction of the viscosity of PP/PE blends compared to existing laws. During the recycling of PP, some pollutants are likely to be present in the polymer, mostly PE which tends to form a heterogeneous melt with PP. At low volume fractions, PE disperses mostly as solid spheres in PP due to its higher viscosity, but the viscosity of the PP/PE mixtures is hard to predict. Several studies have derived equivalent viscosity equations for dispersed spherical suspensions in shear‐thinning polymers. Nevertheless, these equations mainly refer to Einstein's equation for suspended spheres in Newtonian fluids. POLYM. ENG. SCI., 59:E387–E396, 2019. © 2019 Society of Plastics Engineers 相似文献
72.
In this paper we present a method for estimating the statistical properties of two well-known edge detectors: the non maxima
suppression and the zero crossing of the Laplacian algorithms. Assuming the data are corrupted by an additive Gaussian noise
we derive the probability density function (pdf) of the detected edge. Thanks to this approach the computed pdf explicitly
depends on the parameters of the edge detector. Experimental results on real images and comparisons with Monte Carlo simulations
are presented in order to characterize the performance of this method. 相似文献
73.
Wireless Networks - Using efficiently the wireless sensor networks based on IEEE 802.15.4/zigbee remains a real challenge for the forest fire detection and monitoring applications. The most... 相似文献
74.
Sid Ahmed Hichame Belkhira Sofiane Boukli Hacene Pascal Lorenz Mohammed Belkheir Marc Gilg Merahi Bouziani 《International Journal of Communication Systems》2019,32(11)
Within ad hoc and wireless sensor networks, communications are accomplished in dynamic environments with a random movement of mobile devices. Thus, routing protocols over these networks are an important concern to offer efficient network scalability, manage topology information, and prolong the network lifetime. Optimized link state routing (OLSR) is one of those routing protocols implemented in ad hoc and wireless sensor networks. Because of its proactive technique, routes between two nodes are established in a very short time, but it can spend a lot of resources for selecting the multipoint relays (MPRs: nodes responsible for routing data) and exchanging topology control information. Thus, nodes playing for a long time a role of MPR within networks implementing such protocol can rapidly exhaust their batteries, which create route failures and affect the network lifetime. Our main approach relies on analyzing this concern by introducing a new criterion that implements a combination between the residual energy of a node and its reachability in order to determine the optimal number of MPRs and sustain the network lifetime. Simulations performed illustrate obviously that our approach is more significant compared with the basic heuristic used by original OLSR to compute the MPR set of a node. 相似文献
75.
Microsystem Technologies - During the last decade, IR MEMS thermopile detectors have become a topic of increasing interest because of their reliable characteristics and excellent cost-performance... 相似文献
76.
Method to estimate uncertainty associated with parcel size in coarse discrete particle simulation 下载免费PDF全文
Coarse grained particle methods significantly reduce the computation cost of large‐scale fluidized bed simulation by lumping many real particles into a computation parcel. This research provides a method to estimate the errors associated with parcel size in large‐scale fluidized bed simulations. This uncertainty is first quantified in small scale domains by comparing results of discrete particle method with that employing coarse parcels of different sizes. Then, this uncertainty is correlated with parcel size and simulation domains consisting of a simple homogeneous cooling system and more complex bubbling and circulating fluidized beds. These correlations allow us to accurately estimate the uncertainty in large‐scale fluidized beds based solely on data obtained in smaller systems. The ability to estimate model‐related uncertainty in larger systems makes this method relevant for industrial applications. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2340–2350, 2018 相似文献
77.
Medjram Sofiane Brethe Jean-François Benali Khairidine 《Multimedia Tools and Applications》2020,79(31-32):22617-22633
Multimedia Tools and Applications - Nowadays, robots are indispensable in industry, especially logistics industry, to replace human employees performing heavy lifting tasks. Introducing robots... 相似文献
78.
79.
The Journal of Supercomputing - Numerical simulation of multi-physical processes requires a lot of processor time, especially when solving ill-conditional linear systems arising in fluid dynamics... 相似文献
80.