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排序方式: 共有68条查询结果,搜索用时 15 毫秒
21.
A set of mobile devices that employs wireless transmission for communication is termed Mobile Ad hoc Networks (MANETs). Offering better communication services among the users in a centralized organization is the primary objective of the MANET. Due to the features of MANET, this can directly End-to-End Delay (EED) the Quality of Service (QoS). Hence, the implementation of resource management becomes an essential issue in MANETs. This paper focuses on the efficient Resource Allocation (RA) for many types of Traffic Flows (TF) in MANET. In Mobile Ad hoc Networks environments, the main objective of Resource Allocation (RA) is to process consistently available resources among terminals required to address the service requirements of the users. These three categories improve performance metrics by varying transmission rates and simulation time. For solving that problem, the proposed work is divided into Queue Management (QM), Admission Control (AC) and RA. For effective QM, this paper develops a QM model for elastic (EL) and inelastic (IEL) Traffic Flows. This research paper presents an AC mechanism for multiple TF for effective AC. This work presents a Resource Allocation Using Tokens (RAUT) for various priority TF for effective RA. Here, nodes have three cycles which are: Non-Critical Section (NCS), Entry Section (ES) and Critical Section (CS). When a node requires any resources, it sends Resource Request Message (RRM) to the ES. Elastic and inelastic TF priority is determined using Fuzzy Logic (FL). The token holder selects the node from the inelastic queue with high priority for allocating the resources. Using Network Simulator-2 (NS-2), simulations demonstrate that the proposed design increases Packet Delivery Ratio (PDR), decrease Packet Loss Ratio (PLR), minimise the Fairness and reduce the EED. 相似文献
22.
Wireless Personal Communications - In the vast field of E-Commerce and E-Business, the appropriate way of customer analysis is very much important to make a business more successful. In such modes... 相似文献
23.
Kannojia Harindra Kumar Sidhique Aboobackkar Shukla Ambika Shanker Pednekar Jaising Gupta Shalabh Dixit Pradeep 《Microsystem Technologies》2022,28(4):955-964
Microsystem Technologies - Design and fabrication of the through-glass via (TGV) based three-dimensional (3D) spiral inductors in the fused silica substrates by a simpler electrochemical discharge... 相似文献
24.
Rajesh Kumar Ulaganathan Pradip Kumar Roy Swapnil Milind Mhatre Raghavan Chinnambedu Murugesan Wei-Liang Chen Man-Hong Lai Ambika Subramanian Chang-Yu Lin Yu-Ming Chang Stela Canulescu Alex Rozhin Chi-Te Liang Raman Sankar 《Advanced functional materials》2023,33(17):2214078
3D organic-inorganic metal halide perovskites are excellent materials for optoelectronic applications due to their exceptional properties, solution processability, and cost-effectiveness. However, the lack of environmental stability highly restricts them from practical applications. Herein, a stable centimeter-long 2D hybrid perovskite (N-MPDA)[PbBr4] single crystal using divalent N1-methylpropane-1,3-diammonium (N-MPDA) cation as an organic spacer, is reported. The as-grown single crystal exhibits stable optoelectronic performance, low threshold random lasing, and multi-photon luminescence/multi-harmonic generation. A photoconductive device fabricated using (N-MPDA)[PbBr4] single crystal exhibits an excellent photoresponsivity (≈124 AW−1 at 405 nm) that is ≈4 orders of magnitudes higher than that of monovalent organic spacer-assisted 2D perovskites, such as (BA)2PbBr4 and (PEA)2PbBr4, and large specific detectivity (≈1012 Jones). As an optical gain media, the (N-MPDA)[PbBr4] single crystal exhibits a low threshold random lasing (≈6.5 µJ cm−2) with angular dependent narrow linewidth (≈0.1 nm) and high-quality factor (Q ≈ 2673). Based on these results, the outstanding optoelectronic merits of (N-MPDA)[PbBr4] single crystal will offer a high-performance device and act as a dynamic material to construct stable future electronics and optoelectronic-based applications. 相似文献
25.
Flocculation of kaolinite suspensions in water by chitosan 总被引:15,自引:0,他引:15
Flocculation of kaolinite suspensions in water using chitosan was studied in the pH range 5-9 and the turbidity ranging from 10 to 160 NTU. Chitosan, in presence of trace quantities of a substance present in aqueous soil extracts, effectively reduces turbidity due to kaolinite by flocculation and settling. Flocculation efficiency is very sensitive to pH, and reaches a maximum at pH 7.5. The optimal chitosan concentration required to effect flocculation is independent of kaolinite concentration within the range examined. Flocculation is faster at higher concentrations of kaolinite and the flocs are large and settle rapidly. 相似文献
26.
S. C. Raghavendra Syed Khasim M. Revanasiddappa M. V. N. Ambika Prasad A. B. Kulkarni 《Bulletin of Materials Science》2003,26(7):733-739
In situ polymerization of aniline was carried out in the presence of fly ash (FA) to synthesize polyaniline/ fly ash (PANI/FA) composites.
The PANI/FA composites have been synthesized with various compositions (15, 20, 30 and 40 wt%) of FA in PANI. The composites,
thus synthesized have been characterized by infrared spectroscopy and X-ray diffraction. The morphology of these samples was
studied by scanning electron microscopy. Further the a.c. conductivity of these composites have been investigated in the frequency
range 102–106 Hz. The presence of polarons and bipolarons are made responsible for frequency dependence of a.c. conductivity in these composites.
The Cole-Cole plots indicate clear shift in the distribution of relaxation times as the wt% of FA in PANI changes. These composites
show almost symmetric semicircles of Cole-Cole plots indicating the Debye-type relaxation in their polarization response. 相似文献
27.
The PANI/CeO2 composites were synthesized using in situ deposition technique by placing fine graded CeO2 in polymerization mixture of aniline. This is the single step polymerization process for the direct synthesis of emeraldine salt phase of polymer. Low frequency dielectric studies were carried out on pressed pellets of PANI/CeO2 with various concentrations of cerium oxide (10, 20, 30, 40, and 50 wt % of CeO2 in PANI). The results are interpreted in terms of polarons and bipolarons, which are responsible for the dielectric relaxation mechanism and frequency dependence of conductivity. It is found that a.c. measurements at room temperature may well serve as a parallel way to the time consuming d.c. conductivity versus temperature technique, to detect the thermal degradation of the transport properties in conducting polymers. It is observed that the charge motion via creation/annihilation of polarons and bipolarons increases as the weight percentage of the composite is increased. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1403–1405, 2006 相似文献
28.
Mechanism of kaolinite and titanium dioxide flocculation using chitosan--assistance by fulvic acids? 总被引:4,自引:0,他引:4
Flocculation of kaolinite using chitosan alone as flocculant has been reported to be difficult. Detailed investigations in our laboratory have shown that kaolinite can be easily removed from aqueous suspensions by flocculation and settling using chitosan, provided the suspension medium contains traces of dissolved humic substances. The flocculation is also extremely sensitive to the pH of the suspension. Removal of suspended titanium dioxide particles in water by flocculation using chitosan in presence of humic acids is also reported for the first time. A plausible mechanism explaining these observations is proposed in this paper. 相似文献
29.
30.
Majhi Babita Naidu Diwakar Mishra Ambika Prasad Satapathy Suresh Chandra 《Neural computing & applications》2020,32(12):7823-7838
Neural Computing and Applications - Precise measurement or estimation of evaporation losses is extremely important for the development of water resource management strategies and its effective... 相似文献