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Modelling vehicular interactions for heterogeneous traffic flow using cellular automata with position preference

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Journal of Modern Transportation 2017年第3期25卷 163-177页

作者： gaurav pandey K.Ramachandra Rao Dinesh Mohan Department of Civil Engineering and Transportation Research and Injury Prevention Programme Indian Institute of Technology Delhi Shiv Nadar University

This paper proposes and validates a modified cellular automata model for determining interaction rate （i.e. number of car-following/overtaking instances） using traffic flow data measured in the field. The proposed model considers lateral position preference by each vehicle type and introduces a position preference parameter fl in the model which facilitates gradual drifting towards preferred position on road, even if the gap in front is sufficient. Additionally, the model also improves upon the conven- tional model by calculating safe front and back gap dynamically based on speed and deceleration properties of leader and follower vehicles. Sensitivity analysis was carried out to determine the effect of β on vehicular interac- tions and the model was calibrated and validated using interaction rates observed in the field. Paired tests were conducted to determine the determining interaction rates validity of the model in Results of the simulations show that there is a parabolic relationship between area occupancy and interaction rate of different vehicle types. The model performed satisfactorily as the simulated interaction rate between different vehicle types were found to be statistically similar to those observed in field. Also, as expected, the interaction rate between light motor vehicles （LMVs） and heavy motor vehicles （HMVs） were found to be higher than that between LMVs and three wheelers because LMVs and HMVs share the same lane. This could not be done using conventional CA models as lateral movement rules were dictated by only speeds and gaps. So, in conventional models, the vehicles would end up in positions which are not realistic. The position preference parameter introduced in this model motivates vehicles to stay in their preferred positions. This study demonstrates the use of interaction rate as a measure to validate micro- scopic traffic flow models.

关键词： Cellular automata Vehicular interaction ratePosition preference Traffic flow modelling Video-graphic survey

Novel CMS lines in pigeonpea[Cajanus cajan(L.)Millspaugh]derived from cytoplasmic substitutions,and their effective restoration and deployment in hybrid breeding

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The Crop Journal 2017年第1期5卷 89-94页

作者： Abhishek Bohra Rintu Jha Indra Prakash Singh gaurav pandey Shalini Pareek Partha Sarathi Basu Sushil Kumar Chaturvedi Narendra Pratap Singh ICAR Indian Institute of Pulses Research(IIPR)Kanpur 208024India

The availability of stable cytoplasmic male sterile(CMS or A) lines coupled with a robust restoration system(R lines) is an essential prerequisite for efficient hybrid ***-enabled hybrid technology holds immense potential to enhance the long-stagnant productivity of pigeonpea. In the present investigation, cytoplasmic substitutions were made in the nuclear backgrounds of early-maturing pigeonpea varieties or lines. Three new CMS lines(ICPL 88039 A, Pusa 992 A, and DPP 3-2A) resulted from genetic crosses involving cytoplasmic donors from A2(GT 288A) and A4(ICPA 2089) categories. In addition to visual inspection of anthers, pollen-staining techniques and scanning electron microscopy(SEM)analysis were used to confirm pollen sterility. Further, given the relevance of the plant mitochondrial genome to CMS manifestation, 25 mitochondrion-specific DNA markers were assayed on these newly developed A lines and isogenic maintainer(B) lines. DNA polymorphism between Pusa 992 A and Pusa 992 B as revealed by the nad7a_del marker confirmed the successful combination of sterilizing cytoplasm(A4) and nonrestoring nuclear background(Pusa 992). Such cytoplasm-specific DNA markers are required for A2-CMS as well. Further, to assess restoration ability, potential restorers were crossed with these CMS lines, and as a consequence, promising A × R combinations exhibiting 100%pollen fertility could be identified. In parallel, we also analyzed the inheritance patterns underlying fertility restoration using ICPL 88039A-derived F2 and BC1F1populations,and established a monogenic dominant model to explain the phenomenon of A2-CMS restoration. In summary, we report the successful development of new CMS lines and describe their effective deployment in hybrid breeding of pigeonpea.

关键词： Cytoplasm Hybrid Mitochondria Pigeonpea Restorer Sterility

Prevention and treatment of hypoxia-induced colorectal cancer damage in albino Wister rats

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Life Research 2024年第1期7卷 16-23页

作者： Ishrat Jahan Manju pandey Shalini Pal Bushra Jabi Mohd Yaqub Khan gaurav Kaithwas Department of Pharmaceutical Sciences Babasaheb Bhimrao Ambedkar UniversityLucknow 226025 India Institute of Pharmacy Shri Ramswaroop Memorial UniversityBarabanki 225003India School of Pharmaceutical Education&Research Jamia HamdardNew Delhi 110062India Institute of Pharmacy Azad Institute of Pharmacy and ResearchLucknow 226008India

Background:In the early metastasis of colon cancer,cancer cells detach,migrate,and infiltrate surrounding tissues,including lymph vessels and blood *** heterogeneity arises from both tumor cells and distinct *** of blood vessels,creates hypoxic regions within the tumors,fostering cancer stem cell-like properties due to reduced oxygen and nutrient *** hypoxia,tumor cells shift to a glycolytic pathway,producing more lactic acid that acidifies the microenvironment and leads to unstable heart rate variability(HRV)factors,weight disparity,and a higher incidence of aberrant crypt foci(ACF).These hypoxic-induced parameters promote cancer cell invasion,increase radiation resistance,and facilitate cancer cell ***:In this study,we induced hypoxia-preneoplastic colon damage in albino Wister rats by administrating 1,2-dimethyl hydrazine(DMH).After successfully creating a hypoxic environment in albino Wister rats,resulting in preneoplastic colon damage,we randomly allocated Wistar albino rats into seven groups,each containing 8 animals,and conducted a 6-week *** 1-Normal control(administered 1 mM EDTA+saline,2 ml/kg/day,p.o.);group 2-Toxic control(administered DMH,30 mg/kg/week,s.c.);group 3-Standard treatment(DMH,30 mg/kg/week,*** 6 weeks),followed by 5-fluorouracil and Leucovorin(25 mg/kg each on 1^(st),3^(rd),7^(th),and 10^(th) days,*** 6 weeks administration of DMH);group 4-Low dose of P1(DMH,30 mg/kg/week,s.c.+P1,2 mg/kg,i.v.,weekly for 3 weeks);group 5-High dose P1(DMH,30 mg/kg/week,s.c.+P1,4 mg/kg,i.v.,weekly for 3 weeks),group 6-Low dose of P2(DMH,30 mg/kg/week,s.c.,+P2,2 mg/kg,i.v.,weekly for 3 weeks),group 7-High dose of P2(DMH,30 mg/kg/week,s.c.,+P2,4 mg/kg,*** for 3 weeks).Results:DMH-treated rats exhibited alterations in HRV factors,weight disparity,elevated gastric pH,increased total acidity,a higher incidence of ACF,and changes in antioxidant markers(TBARs,SOD,catalase,GSH).Bri

关键词： colon cancer 1,2,4-triazine derivatives oxidative stress hypoxia-induced colon carcinogenesis

Assessment of long-term climate variability and its impact on the decadal growth of horticultural crops in central India

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Ecological Processes 2022年第1期11卷 862-889页

作者： gaurav Sharma Amita Sharma Nishant Kumar Sinha Om Prakash Sharma Ashutosh Singh Ajai Kumar pandey Abhishek Kumar Sudhir Kumar Trivedi Bharti Sao Mukesh Kumar Sahu College of Horticulture and Forestry Rani Lakshmi Bai Central Agricultural UniversityJhansiUttar Pradesh 284003India Department of Environmental Science Rajmata Vijayaraje Scindia Krishi VishwavidyalayaGwaliorMadhya Pradesh 474002India Division of Soil Physics Indian Institute of Soil ScienceBhopalMadhya Pradesh 462038India Department of Floriculture and Landscape Architecture Indira Gandhi Krishi VishwavidyalayaRaipurChhattisgarh 492012India

Background:The impact of climate change on horticultural production is of utmost concern *** such vulnerable region of horticultural importance is the Madhya Pradesh state in the central part of *** is crucial to analyse the long-term trend in climatic variations and its effect on horticultural crop ***,this study focuses on detecting trends in mean annual precipitation and temperature of 115 years for the 15 districts covering all the regions of the state as well as projections of all the Representative Concentration Pathway(RCP)climatic scenarios for 2050 and 2080 of Madhya Pradesh *** decadal(2010–2020)insight into the area and production of horticultural crops is undertaken which will help forecasting the future growth *** a better insight,case study on four horticultural crops is undertaken to assess their decadal growth trend vis-à-vis climate parameters in these 15 ***:The Mann–Kendall test for 1901–2016 and Sen’s slope indicated a non-significant change in long-term trend for precipitation except for increasing change in Khargone and decreasing change in Rewa ***-cant increasing trend of average temperature is obtained for Hoshangabad,Jabalpur,Sagar and Rewa *** Sen’s slope indicated an increase of 0.005 to 0.009℃for maximum temperature and 0.005 to 0.012℃for minimum temperature *** projections of all the RCP climate scenarios for the years 2050 and 2080 indicated non-significant variation in precipitation but an increase in maximum(1.4 to 4.1℃)and minimum(1.45 to 4.65℃)annual *** increasing trend in area and production for horticultural crops is also observed in central India for the study *** is yield increase in all the crops selected in case study except for potato,which recorded a decreased yield between the years 2010–***:The Mann–Kendall test and projections indicate towards climate change with a temperature *** the decad

关键词： Climate change Horticulture Madhya Pradesh Precipitation Temperature Trend analysis

Soil quality assessment across different stands in tropical moist deciduous forests of Nagaland,India

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Journal of Forestry Research 2019年第4期30卷 1479-1485页

作者： gaurav Mishra Rossana Marzaioli Krishna Giri Shailesh pandey Rain Forest Research Institute JorhatAssamIndia Department of Environmental Biological and Pharmaceutical Sciences and TechnologiesSecond University of NaplesCasertaItaly Forest Research Institute DehradunUttarakhandIndia

To analyze the relationship between the management of three forest stand plantations and soil quality in the Dimapur district of the Northeastern Himalayan region,India,three forest soil profiles,covered by different species stands,at three depths were tested for 13 physical and chemical *** four of these variables(electric conductivity,bulk density exchangeable Mg and available P)were included in a minimum data set,after using a varimax rotation algorithm in a principal component analysis,and subsequently used to calculate a soil quality index(SQI).Results showed higher SQIs in the surface layers(0–20 cm depth)than in the deeper *** weighed SQI varied significantly(P<0.05)through the three considered forest sites,with the lowest value at site *** findings reveal that the approach used here is suitable for preliminary screening of the impact of a forestry species on soil,to aid in species selection and improve soil health for afforestation and reforestation projects.

关键词： Forest stand Nagaland Soil quality indicators Soil quality index

Fabrication of AA7005/TiB2-B4C surface composite by friction stir processing: Evaluation of ballistic behaviour

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Defence Technology（防务技术） 2019年第3期15卷 363-368页

作者： Nitinkumar Pol gaurav Verma R.P.pandey T.Shanmugasundaram Research and Development Establishment (Engineers) Pune India Department of Metallurgical & Materials Engg. Defence Institute of Advanced Technology Pune India Armament Research and Development Establishment Pune India

The present work aims to enhance the ballistic resistance of AA7005 alloy by incorporating the TiB2 and B4C ceramic reinforcement particles. Surface composites with different weight fractions of TiB2 and B4C particles were processed by friction stir processing. Micro-hardness and depth of penetration tests were carried out to evaluate the ballistic properties of the surface composites. The surface hardness of the composite was found to be nearly 70 HV higher than base alloy. The depth of penetration of the steel projectile was 20e26mm in the composites as compared to 37mm in the base alloy. Ballistic mass efficiency factor of the surface composite was found to be 1.6 times higher than base alloy. This is mainly attributed to the dispersion strengthening from the reinforcement particles.

关键词： Aluminum alloys Metal matrix composite Ballistic testing Friction stir processing

ZnO、ZnO/ZnS和ZnO/ZnS/α-Fe_2O_3纳米复合材料的光致发光行为及可见光催化活性（英文）

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Transactions of Nonferrous Metals Society of China 2018年第7期28卷 1387-1397页

作者： gaurav HITKARI Sandhya SINGH Gajanan pandey Sophisticated Instrumentation Laboratory Department of Applied Chemistry School for Physical Science Babasaheb Bhimrao Ambedkar University

为了获得用于染料甲基橙(MEO)降解的高效、经济、易得的光催化剂,采用简单的化学合成法在水溶液介质中制备ZnO、ZnO/ZnS和ZnO/ZnS/α-Fe_2O_3纳米复合材料。利用X射线衍射(XRD)和BET技术测定合成材料的物相、结晶度、表面结构和表面行为... 详细信息

为了获得用于染料甲基橙(MEO)降解的高效、经济、易得的光催化剂,采用简单的化学合成法在水溶液介质中制备ZnO、ZnO/ZnS和ZnO/ZnS/α-Fe_2O_3纳米复合材料。利用X射线衍射(XRD)和BET技术测定合成材料的物相、结晶度、表面结构和表面行为。X射线衍射结果表明,ZnO、ZnO/ZnS和ZnO/ZnS/α-Fe2O3纳米材料结晶良好。根据XRD谱中各峰的强度,确定纳米复合材料的组成。BET分析表明,所制备的材料具有介孔行为、Ⅳ型(吸附脱附)曲线和H4型迟滞现象。3种材料中,ZnO/ZnS/α-Fe_2O_3复合材料的比表面积最大。利用紫外-可见光谱分析,测定材料的带隙能,光致发光光谱(PL)则用来确定材料的发射行为和表面缺陷。在PL光谱中,ZnO/ZnS的紫外峰强度比ZnO的低,且ZnO/ZnS/α-Fe_2O_3的紫外峰强度更低。与ZnO相比,ZnO/ZnS的可见发射光谱强度增大,且ZnO/ZnS/α-Fe_2O_3的可见发射光谱强度比ZnO/ZnS的更大。所合成的材料被用作染料甲基橙降解的光催化剂。光降解数据表明,3种染料甲基橙降解的光催化剂中ZnO/ZnS/α-Fe_2O_3是最佳的。紫外光发射峰强度的降低和可见光发射强度的增大导致电子和空穴复合减少,因而使得ZnO/ZnS/α-Fe_2O_3具有最高的光催化活性。

关键词：纳米复合材料 ZnO ZnS α-Fe2O3 煅烧光学性质光催化活性

Utility of trans-vaginal ultrasound in diagnosis and follow-up of non-pregnant sexually active females with lower ureteric calculi

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Asian Journal of Urology 2020年第1期7卷 45-50页

作者： Siddharth pandey Tanica pandey Apul Goel Ajay Aggarwal Deepanshu Sharma Tushar pandey Satya sankhwar gaurav Garg Department of Urology King George’s Medical UniversityLucknowIndia Department of Radiology Raghav Pathlabs and ImagingHaldwaniIndia Department of Pathology Post Graduate Institute of Medical Education and ResearchChandigarhIndia

objective:To assess the utility of trans-vaginal ultrasonography in evaluation of non-pregnant sexually active female patients with lower ureteric ***:A prospective study was done from January 2015 to December 2017 including non-pregnant sexually active females with suspected ureteric ***-abdominal ultrasound was initially done in all *** those patients in whom trans-abdominal ultrasound was inconclusive or there was indirect evidence of lower ureteric calculus in form of ureteral dila-tion but no calculus was evident,trans-vaginal ultrasound was *** patients with ureteric calculi detected on trans-vaginal ultrasound and kept on conservative management were also followed up with trans-vaginal ***-contrast computed tomography was done in patients with inconclusive trans-vaginal ***:As per the study protocol,156 out of the total 468 patients evaluated by trans-abdominal ultrasound were eligible for trans-vaginal ***-vaginal ultrasound was done in 149 patients,as seven patients did not give ***-nine patients were detected with a lower ureteric calculus on trans-vaginal ultrasound and 27 patients had gyne-cologic or other cause for their ***-three patients had an inconclusive trans-vaginal ultrasound of which 36 underwent non-contrast computed tomography,among them only one patient had a lower ureteric *** free status could be easily demonstrated on follow-up trans-vaginal ultrasound.

关键词： Trans-abdominal ultrasound Trans-vaginal ultrasound Lower ureteric calculus Ureteric colic Ureter

Molecular identification of sex in Hippophae rhamnoides L. using isozyme and RAPD markers

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Forestry Studies in China 2010年第2期12卷 62-66页

作者： Amit SHARMA gaurav ZINTA Satender RANA Poonam SHIRKOT Department of Biotechnology Dr. Yashwant Singh Parmar University of Horticulture & Forestry

In many dioecious plants, gender affects economic value, breeding schemes and opportunities for commercial harvests. Hippophae rhamnoides L. is a dioecious plant species in which female genotypes are commercially preferred over male genotypes. Its berries have rich medicinal, nutritional and pharmaceutical properties because of their large amounts of vitamins, essential oils, proteins, fatty acids, free amino acids and flavanoids. Primary limitation for breeding H. rhamnoides L. is its dioecious nature, since gender cannot be identified by traditional methods. Therefore, some reliable and quick methods need to be developed. This commu- nication deals with the development of isozyme and RAPD markers for early sex identification in this dioecious tree. The isozyme analysis was conducted with four enzyme systems, viz. peroxidase, esterase, malate dehydrogenase and catalase. The peroxidase enzyme system produced a female specific sex marker, which successfully differentiated between the staminate and pistillate geno- types ofH. rhamnoides L. Thirty five random decamer primers were used in our study and one male sex linked marker was identified. OPD-20 （5＇-ACTTCGCCAC-3＇） displayed a band at 911 bp that expressed polymorphism between male and female genotypes. The staminate and pistillate genotypes could be distinguished using RAPD marker OPD-209n. These results revealed the immense poten- tial of peroxidase isozyme patterns and RAPD as genetic markers for sex identification in H. rhamnoides L.

关键词： Hippophae rhamnoides L. sex markers isozyme RAPD dioecism