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| 1 | Analyses of Lattice Traffic Flow Model on a Gradient Highway显示文摘The optimal current difference lattice hydrodynamic model is extended to investigate the traffic flow dynamics on a unidirectional single lane gradient highway. The effect of slope on uphill/downhill highway is examined through linear stability analysis and shown that the slope significantly affects the stability region on the phase diagram.Using nonlinear stability analysis, the Burgers, Korteweg-deVries(KdV) and modified Korteweg-deVries(mKdV) equations are derived in stable, metastable and unstable region, respectively. The effect of reaction coefficient is examined and concluded that it plays an important role in suppressing the traffic jams on a gradient highway. The theoretical findings have been verified through numerical simulation which confirm that the slope on a gradient highway significantly influence the traffic dynamics and traffic jam can be suppressed efficiently by considering the optimal current difference effect in the new lattice model. | Arvind Kumar Gupta Sapna Sharma Poonam Redhu | 2014 | Communications in Theoretical Physics2014，61，9： | 5 |
| 2 | Nonlinear analysis of traffic jams in an anisotropic continuum model显示文摘This paper presents our study of the nonlinear stability of a new anisotropic continuum traffic flow model in which the dimensionless parameter or anisotropic factor controls the non-isotropic character and diffusive influence.In order to establish traffic flow stability criterion or to know the critical parameters that lead,on one hand,to a stable response to perturbations or disturbances or,on the other hand,to an unstable response and therefore to a possible congestion,a nonlinear stability criterion is derived by using a wavefront expansion technique.The stability criterion is illustrated by numerical results using the finite difference method for two different values of anisotropic parameter.It is also been observed that the newly derived stability results are consistent with previously reported results obtained using approximate linearisation methods.Moreover,the stability criterion derived in this paper can provide more refined information from the perspective of the capability to reproduce nonlinear traffic flow behaviors observed in real traffic than previously established methodologies. | Arvind Kumar Gupta Sapna Sharma | 2010 | Chinese Physics B2010，19，11： | 3 |
| 3 | Analysis of the wave properties of a new two-lane continuum model with the coupling effect显示文摘A multilane extension of the single-lane anisotropic continuum model (GK model) developed by Gupta and Katiyar for traffic flow is discussed with the consideration of the coupling effect between the vehicles of different lanes in the instantaneous traffic situation and the lane-changing effect.The conditions for securing the linear stability of the new model are presented.The shock and the rarefaction waves,the local cluster effect and the phase transition are investigated through simulation experiments with the new model and are found to be consistent with the diverse nonlinear dynamical phenomena observed in a real traffic flow.The analysis also focuses on empirically observed twolane phenomena,such as lane usage inversion and the density dependence of the number of lane changes.It is shown that single-lane dynamics can be extended to multilane cases without changing the basic properties of the single-lane model.The results show that the new multilane model is capable of explaining some particular traffic phenomena and is in accordance with real traffic flow. | Arvind Kumar Gupta Sapna Sharma | 2012 | Chinese Physics B2012，21，1： | 2 |
| 4 | Review on Phytochemistry,Biology and Nano Formulations of Manilkara hexandra:An Update显示文摘Background:Manilkara hexandra(Roxb.)dubard is an evergreen tree species that belongs to the Sapotaceae family which has been used in traditional system of medicines since ages in South Asia,especially in Western and Central India.Objective:This review aims to include a thorough report on phytochemicals found in the various sections of the plant,which are responsible for their medicinal properties in turn.Method:All the informations in this article were collated from selected research papers from online database such as PubMed,Web of Science and Scopus.Results:An audit of its literature shows extracts from this plant and bio transformed products possess different activities such as antibacterial,anti-inflammatory,antiulcer,aphrodisiac,immuno-stimulation activity,arthritic activity,and free radical scavenging activity.Apart from therapeutic indications,the products obtained such as edible and nutritious fruit,valuable wood,latex,and bark,are cost effective and are a source of living for local people.The varieties of chemical compounds have been isolated from this species,including sterols,sugar,terpenoids,anthraquinone glycoside,cardiac glycoside,saponin and tannins,etc.Worldwide the large occurrence of this underutilized species offers an incentive to use this plant at crucial levels in the treatment of various ailments.Conclusion:This review attempts to systematically collate the scattered knowledge on M.hexandra,for its botan-ical elements,phytochemistry,ethnopharmacology,and biological activities,to assess the range of variation among natural populations in opening research areas,and to identify elite cultivars for popularization among farmers/tribal for conservation and sustainable use on conducting field improvement studies. | Sushil Kumar Chaudhary Abhinav Sharma Shiveena Bhatia Sapna Kumari Anju Goyal Kajal Nagpal Prerna Sharma Ajmer Singh Grewal Madhukar Garg | 2023 | Clinical Complementary Medicine and Pharmacology2023，3，1： | 0 |
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