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Bi-objective optimization models for mitigating traffic congestion in urban road networks

Journal of Traffic and Transportation Engineering(English Edition) 2023年第1期10卷 86-103页

作者： Haritha Chellapilla R.Sivanandan Bhargava rama Chilukuri Chandrasekharan Rajendran Transportation Engineering Division Department of Civil EngineeringIndian Institute of Technology MadrasChennai 600036India Department of Management Studies Indian Institute of Technology MadrasChennai 600036India

Traffic congestion in road transportation networks is a persistent problem in major metropolitan cities around the *** this context,this paper deals with exploiting underutilized road capacities in a network to lower the congestion on overutilized links while simultaneously satisfying the system optimal flow assignment for sustainable *** congestion mitigation strategies are identified based on deviation and relative deviation of link volume from the corresponding ***,four biobjective mathematical programming optimal flow distribution(OFD)models are *** case study results demonstrate that all the proposed models improve system performance and reduce congestion on high volume links by shifting flows to low volumeto-capacity links compared to UE and SO *** the models,the system optimality with minimal sum and maximum absolute relative-deviation models(SO-SAR and SO-MAR)showed superior results for different performance *** SO-SAR model yielded 50%and 30%fewer links at higher link utilization factors than UE and SO models,***,it showed more than 25%improvement in path travel times compared to UE travel time for about 100 paths and resulted in the least network congestion index of1.04 compared to the other OFD and UE ***,the SO-MAR model yielded the least total distance and total system travel time,resulting in lower fuel consumption and emissions,thus contributing to *** proposed models contribute towards efficient transportation infrastructure management and will be of interest to transportation planners and traffic managers.

关键词： Traffic congestion mitigation Sustainability Bi-objective optimization Optimal flow distribution models Urban road networks

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Mobile Home Residents and Hurricane Vulnerability in South Florida:Research Gaps and Challenges

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International Journal of Disaster Risk Science 2016年第4期7卷 436-439页

作者： Shivangi prasad Justin Stoler Department of Geography and Regional Studies University of Miami Department of Public Health Sciences Miller School of MedicineUniversity of Miami Abess Center for Ecosystem Science and Policy University of Miami

In South Florida there are several social and logistical challenges to surveying and advocating for mobile home residents regarding vulnerability to natural hazards such as sea level rise and *** residents have consequently been understudied despite historically exhibiting higher vulnerability and lower *** exploratory study uses a social-ecological framework to highlight individual-,community-,and institutional-level challenges and research gaps encountered when working with mobile home *** observations represent a longer-term opportunity to further refine our understanding of natural hazard vulnerability,build increased resilience among vulnerable populations,and improve health equity in South Florida and beyond.

关键词： Disaster preparedness Mobile homes Social-ecological model Vulnerability

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A novel monocrystalline PV array configuration for enhancing the maximum power under partial shading conditions

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Clean Energy 2023年第4期7卷 783-794页

作者： Sarayu Vunnam M.Vanithasri rama Koteswara Rao Alla Research Scholar Department of Electrical EngineeringAnnamalai UniversityAnnamalai NagarChidambaramTamilnadu-608002India Assistant Professor Department of Electrical and Electronics EngineeringRVR&JC College of EngineeringGunturAndhra Pradesh-522019India Associate Professor Department of Electrical EngineeringAnnamalai UniversityAnnamalai NagarChidambaramTamilnadu-608002India Associate Professor Department of Electrical and Electronics EngineeringRVR&JC College of EngineeringGunturAndhra Pradesh-522019India

Solar photovoltaic(PV)systems have gained importance as a promising renewable energy source in recent *** arrays are prone to variable irradiance levels under partial shading conditions due to non-uniform *** a result,there will be a decrease in the amount of power produced and hotspots will *** overcome these issues,it is essential to select an appropriate PV material and a suitable array *** obtain the maximum output power from a PV array under partial shading conditions,this paper suggests a novel triple-series–parallel ladder topology with monocrystalline PV *** short and wide,long and wide,short and narrow,long and narrow,middle and diagonal shading situations,a 6×6-sized array has been considered and compared with other existing configurations such as total cross-tied,bridge-link,honeycomb,series–parallel and series–parallel *** proposed configuration has an optimal number of cross ties to produce maximum *** has 4 cross ties fewer than a honeycomb,3 cross ties fewer than a bridge link,16 cross ties fewer than a total cross-tied and 7 cross ties fewer than series–parallel cross-tied *** proposed configuration has an improvement in power of 0.1%to 20%compared with other configurations under the considered shading scenarios.

关键词： monocrystalline PV material photo voltaic array series–parallel cross-tied,triple-series–parallel ladder topology

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Synthesis,Mass Spectrometric Studies,and Biological Evaluation of 3,5-Dimethoxyhomophthalic Acid and Related Compounds

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Chemical Research in Chinese Universities 2007年第5期23卷 533-537页

作者： GHULAM Qadeer NASIM Hasan-rama FAN Zhi-jin Department of Chemistry Quaid-I-Azam University Islamabad 45320 Pakistan State Key Laboratory of Elemento-Organic Chemistry Tianjin Key Laboratory of Pesticide Science Nankai University Tianjin 300071 P. R. China

3,5-Dimethoxyhomophthalic acid was synthesized in four steps from 3,5-dimethoxycinnamic acid via a series of reactions including cyclization of 3-（3＇,5＇-dimethoxyphenyl）propionic acid to 5,7-dimethoxy-1-indanone and oxidative decomposition of methyl-2-hydroxy-2-[5,7-dimethyoxy-1-oxo-1H-inden-2（3H）-ylidene]acetate to 3,5-dimethoxyhomophthalic *** synthesized compounds were characterized by elemental analysis,IR,1H NMR,and *** biological evaluation experiments of 3,5-dimthoxyhomophthalic acid and the related synthesized compounds were also carried *** occurring biologically active isocoumarins were prepared in a single step by the condensation of the homophthalic acid with appropriate acid chlorides.

关键词： 3,5-Dimethoxyhomophthalic acid Naturally occurring isocoumarin Biological evaluation

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Test Case Prioritization in Unit and Integration Testing:A Shuffled-Frog-Leaping Approach

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Computers, Materials & Continua 2023年第3期74卷 5369-5387页

作者： Atulya Gupta Rajendra prasad Mahapatra Department of Computer Science and Engineering SRMISTDelhi-NCR CampusGhaziabad201204India

Both unit and integration testing are incredibly crucial for almost any software application because each of them operates a distinct process to examine the *** to resource constraints,when software is subjected to modifications,the drastic increase in the count of test cases forces the testers to opt for a test optimization *** such strategy is test case prioritization(TCP).Existing works have propounded various methodologies that re-order the system-level test cases intending to boost either the fault detection capabilities or the coverage efficacy at the ***,singularity in objective functions and the lack of dissimilitude among the re-ordered test sequences have degraded the cogency of their *** such gaps and scenarios when the meteoric and continuous updations in the software make the intensive unit and integration testing process more fragile,this study has introduced a memetics-inspired methodology for *** proposed structure is first embedded with diverse parameters,and then traditional steps of the shuffled-frog-leaping approach(SFLA)are followed to prioritize the test cases at unit and integration *** 5 standard test functions,a comparative analysis is conducted between the established algorithms and the proposed approach,where the latter enhances the coverage rate and fault detection of re-ordered test *** results related to the mean average percentage of fault detection(APFD)confirmed that the proposed approach exceeds the memetic,basic multi-walk,PSO,and optimized multi-walk by 21.7%,13.99%,12.24%,and 11.51%,respectively.

关键词： Test case prioritization unit testing shuffled frog leaping approach memetic based optimization algorithm integration testing

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Invited Paper: The Audacity of Fiber-Wireless(FiWi) Networks: Revisited for Clouds and Cloudlets

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China Communications 2015年第8期12卷 33-45页

作者： Martin Maier Bhaskar prasad Rimal Optical Zeitgeist Laboratory

There is a growing awareness among industry players of reaping the benefits of mobile-cloud convergence by extending today's unmodified cloud to a decentralized two-level cloud-cloudlet architecture based on emerging mobile-edge computing(MEC) capabilities. In light of future 5G mobile networks moving toward decentralization based on cloudlets, intelligent base stations, and MEC, the inherent distributed processing and storage capabilities of radio-and-fiber(R&F) networks may be exploited for new applications, e.g., cognitive assistance, augmented reality, or cloud robotics. In this paper, we first revisit fiber-wireless(Fi Wi) networks in the context of conventional clouds and emerging cloudlets, thereby highlighting the limitations of conventional radio-overfiber(Ro F) networks such as China Mobile's centralized cloud radio access network(C-RAN) to meet the aforementioned trends. Furthermore, we pay close attention to the specific design challenges of data center networks and revisit our switchless arrayedwaveguide grating(AWG) based network with efficient support of east-west flows and enhanced scalability.

关键词： cloudlet computation offloading east-west flows intelligent base station mobile-cloud convergence mobile dataoffloading mobile-edge computing (MEC) scalability

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Measurement of strong phases, D-D mixing, and CP violation using quantum correlation at charm threshold

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Frontiers of physics 2016年第1期11卷 1-15页

作者： Matteo rama Sezione di Pisa dell'Istituto Nazionale di Fisica Nucleate Pisa Italy

We review the measurements of the D decay strong-phase parameters based on quantum-correlated D^0D^-0 pairs produced in the e^＋e^→（3770） →D^0D^-0 process, and we discuss their role in the measurements of Cabibbo-Kobayashi-Maskawa angle 7 and D-/9 mixing. In addition, we present estimates of the size of quantum-correlated datasets necessary to support the 7 and charm mixing measurements conducted at the LHCb and Belle Ⅱ experiments. Finally, we review the methods for measuring the D-D^- mixing and cP violation parameters at a high-luminosity charm factory, giving sensitivity estimates.

关键词： quantum correlation charm mixing CP violation

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Fault Type Analysis along the San Andreas Fault Zone: A Numerical Approach

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Journal of Mountain Science 2010年第1期7卷 36-44页

作者： Matrika prasad KOIRALA Daigoro HAYASHI Simulation Tectonics Laboratory Faculty of Science University of the Ryukyus

Finite Element (FE) modeling under plane stress condition is used to analyze the fault type variation with depth along and around the San Andreas Fault (SAF) zone. In this simulation elastic rheology was used and was thought justifiable as the variation in depth from 0.5 km to 20 km was considered. Series of calculations were performed with the variation in domain properties. Three types of models were created based on simple geological map of California, namely, 1) single domain model considering whole California as one homogeneous domain, 2) three domains model including the North American plate, Pacific plate, and SAF zone as separate domains, and 3) Four domains model including the three above plus the Garlock Fault zone. Mohr-Coulomb failure criterion and Byerlee's law were used for the calculation of failure state. All the models were driven by displacement boundary condition imposing the fixed North American plate and Pacific plate motion along N34°W vector up to the northern terminus of SAF and N50°E vector motion for the subducting the Gorda and Juan de Fuca plates. Our simulated results revealed that as the depth increased, the fault types were generally normal, and at shallow depth greater strike slip and some thrust faults were formed. It is concluded that SAF may be terminated as normal fault at depth although the surface expression is clearly strike slip.

关键词： Finite Element modeling plane stress fault type analysis San Andreas Fault zone rockdomain properties failure analysis

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Neuroprotective effects of Fructus Chebulae extracts on experimental models of cerebral ischemia

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Journal of Traditional Chinese Medicine 2014年第1期34卷 69-75页

作者： Bhakta prasad Gaire Hocheol Kim Department of Herbal Pharmacology College of Korean MedicineKyung Hee University

OBJECTIVE:To investigate the neuroprotective effects of Fructus Chebulae extract using both in vivo and invitromodels of cerebral ***:As an in vitro model,oxygen glucose deprivation followed by reoxygenation(OGD-R)and hydrogen peroxide(H2O2)induced cellular damage in rat pheochromocytoma(PC12)cells was used to investigate the neuroprotective effects of extract of Fructus Chebulae.3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was used to calculate cell *** in vivo,occlusion of left middle cerebral artery on rats was carried out as a focal cerebral ischemic ***:Fructus Chebulae extract increases the PC12 cell survival against OGD-R and H2O2by 68%and 91.4%*** Chebulae also de-creases the cerebral infarct volume by 39%and extent of hemisphere swelling from 17%in control group to 10%in FructusChebulaetreated ***:Fructus Chebulae,as a traditional medicine,can rescue the neuronal cell death against ischemia related *** possible mechanism for the neuroprotection might be the inhibition of oxidative damages occurring after acute phase of cerebral ischemia.

关键词： Fructus Chebulae Pheochromocytoma Neuroprotection Brain ischemia Middle cerebral artery

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Food security status in rural areas of Mizoram,Northeast India

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Journal of Mountain Science 2017年第4期14卷 795-805页

作者： Vishwambhar prasad SATT Lalrinpuia VANGCHHIA Department of Geography and Resources Management School of Earth SciencesMizoram UniversityAizawl 796004India

Rural areas practice subsistence of the Mizoram state, India agriculture where shifting cultivation dominates the farming systems. As a result, output from crops is very low and thus, the rural areas suffer from food insecurity. This paper analyses food security status in the rural areas of Mizoram and suggests the measures to attain food security. A case study of 16 villages, lying in all the eight districts of Mizoram, was conducted in 2014 and 1527 households （76%） out of total 2010 households were surveyed through purposive random sampling method. Structured questionnaire was constructed and questions on three food security components and 13 indicators were asked. We used Z score technique to calculate data and finally got a composite score of all the components of food security. Our result shows that food availability in the study villages is very less as composite score stands for ***3 whereas food accessibility is comparatively higher, mainly due to availability of fair price shops （mean value is one）, high agricultural working population （40.1%） and high literacy rate （70.6%）. Therefore, its composite score is 0.236. Food stability scores only -0.062 and finally overall food security stands for 0.178, which is inadequate. We have suggested that‘system rice intensification＇, which is already in practice, should be given priority. Adequate irrigation facilities, proper public distribution system, cultivation of fruits and vegetables, value addition in farm products and access to market may achieve food security.

关键词： Food availability Food accessibility Food stability Food security Mizoram

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