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Mapping Sensitive Vegetation Communities in Mining Eco-space using UAV-LiDAR

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International Journal of Coal Science & Technology 2022年第3期9卷 185-200页

作者： bikram Pratap Banerjee Simit Raval Agriculture Victoria Grains Innovation Park110 Natimuk Road3400 HorshamVICAustralia School of Minerals and Energy Resources Engineering University of New South Wales2052 SydneyNSWAustralia

Near earth sensing from uncrewed aerial vehicles or UAVs has emerged as a potential approach for fne-scale environmental *** systems provide a cost-efective and repeatable means to acquire remotely sensed images in unprecedented spatial detail and a high signal-to-noise *** is increasingly possible to obtain both physiochemical and structural insights into the environment using state-of-art light detection and ranging(LiDAR)sensors integrated onto *** sensitive environments,such as swamp vegetation in longwall mining areas,is essential yet challenging due to their inherent *** practices for monitoring these remote and challenging environments are primarily *** is partly due to an absent framework and challenges of using UAV-based sensor systems in monitoring such sensitive *** research addresses the related challenges in developing a LiDAR system,including a workfow for mapping and potentially monitoring highly heterogeneous and complex *** involves amalgamating several design components,including hardware integration,calibration of sensors,mission planning,and developing a processing chain to generate usable *** also includes the creation of new methodologies and processing routines to establish a pipeline for efcient data retrieval and generation of usable *** designed systems and methods were applied to a peat swamp environment to obtain an accurate geo-spatialised LiDAR point *** of the LiDAR data was tested against ground-based measurements on various aspects,including visual assessment for generation LiDAR metrices maps,canopy height model,and fne-scale mapping.

关键词： Upland swamps Mine surveying Monitoring Environment sustainability Drones and laser scanning

A robust approach to identify roof bolts in 3D point cloud data captured from a mobile laser scanner

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International Journal of Mining Science and Technology 2021年第2期31卷 303-312页

作者： Sarvesh Kumar Singh Simit Raval bikram Banerjee School of Minerals and Energy Resources Engineering University of New South WalesSydneyNSW 2052Australia Agriculture Victoria HorshamVIC 3400Australia

Roof bolts such as rock bolts and cable bolts provide structural support in underground *** assessment of these support structures is critical to maintain roof stability and minimise safety risks in underground *** study proposes a robust workflow to classify roof bolts in 3 D point cloud data and to generate maps of roof bolt density and *** workflow was evaluated for identifying roof bolts in an underground coal mine with suboptimal lighting and global navigation satellite system(GNSS)signals not *** approach is based on supervised classification using the multi-scale Canupo classifier coupled with a random sample consensus(RANSAC)shape detection algorithm to provide robust roof bolt *** issue of sparseness in point cloud data has been addressed through upsampling by using a moving least squares *** accuracy of roof bolt identification was measured by correct identification of roof bolts(true positives),unidentified roof bolts(false negatives),and falsely identified roof bolts(false positives)using correctness,completeness,and quality *** proposed workflow achieved correct identification of 89.27%of the roof bolts present in the test ***,considering the false positives and false negatives,the overall quality metric was reduced to 78.54%.

关键词： Mobile laser scanning Roof bolts Support system planning Roof monitoring Change detection Underground roadways

A review of laser scanning for geological and geotechnical applications in underground mining

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International Journal of Mining Science and Technology 2023年第2期33卷 133-154页

作者： Sarvesh Kumar Singh bikram Pratap Banerjee Simit Raval School of Minerals and Energy Resources Engineering University of New South WalesSydneyNSW 2052Australia Agriculture Victoria Grains Innovation ParkHorshamVIC 3400Australia

Laser scanning can provide timely assessments of mine sites despite adverse challenges in the operational *** there are several published articles on laser scanning,there is a need to review them in the context of underground mining *** this end,a holistic review of laser scanning is presented including progress in 3D scanning systems,data capture/processing techniques and primary applications in underground *** scanning technology has advanced significantly in terms of mobility and mapping,but there are constraints in coherent and consistent data collection at certain mines due to feature deficiency,dynamics,and environmental influences such as dust and *** suggest that laser scanning has matured over the years for change detection,clearance measurements and structure mapping ***,there is scope for improvements in lithology identification,surface parameter measurements,logistic tracking and autonomous *** scanning has the potential to provide real-time solutions but the lack of infrastructure in underground mines for data transfer,geodetic networking and processing capacity remain limiting ***,laser scanners are becoming an integral part of mine automation thanks to their affordability,accuracy and mobility,which should support their widespread usage in years to come.

关键词： Mine automation Point cloud Rock mass characterisation Change detection Data registration Georeferencing

Antioxidant activity and identification of bioactive compounds from leaves of Anthocephalus cadamba by ultra-performance liquid chromatography/electrospray ionization quadrupole time of flight mass spectrometry

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Asian Pacific Journal of Tropical Medicine 2012年第12期5卷 977-985页

作者： Madhu Chandel Upendra Sharma Neeraj Kumar bikram Singh Satwinderjeet Kaur Department of Botanical and Environmental Sciences Guru Nanak Dev UniversityAmritsar-143005 India Natural Plant Products Division CSIR-Institute of Himalyan Bioresource Technology(Council of scientific and Industrial research)PalampurH.P.-176061 India

Objective:To evaluate the antioxidant potential of different extract/fractions of Anthocephalus cadamba（***）（Roxb.） Miq.（Rubiaceae） and study the tentative identification of their active ***:The extract/fractions were screened for antioxidant activity using various in vitro assays *** assay,ABTS assay,superoxide anion radical scavenging assay, reducing power assay and plasmid DNA nicking *** phenolic content of extract/fractions was determined by colorimetric *** ultra-performance LC-electrospray-quadrupoletime of flight mass spectrometry method was used to analyse the active constituents of extract/ fractions of ***:The ethyl acetate fraction was found to be most active fraction in all the assays as compared to other extract/*** IC50 value of ethyl acetate fraction （ETAC fraction） was 21.24μg/mL,1.12μg/mL,9.68μg/mL and S7.81μg/mL in DPPH assay, ABTS assay,reducing power assay and superoxide scavenging assay *** the extract/ fractions also showed the potential to protect the plasmid DNA（pBR322） against the attack of hydroxyl radicals generated by Fenton’s *** bioactive compounds were identified by UPLC-ESI-QTOF-MS,by comparing the mass andλmax with literature ***:The potential of the extract/fractions to scavenge different free radicals in different systems indicated that they may be useful therapeutic agents for treating radical-related pathologic damage.

关键词： Anthocephalus cadamba Antioxidant activity UPLC-ESI-QTOF-MS

Spoil characterisation using UAV-based optical remote sensing in coal mine dumps

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International Journal of Coal Science & Technology 2023年第5期10卷 72-86页

作者： Sureka Thiruchittampalam Sarvesh Kumar Singh bikram Pratap Banerjee Nancy F.Glenn Simit Raval School of Minerals and Energy Resources Engineering University of New South WalesSydneyNSW 2052Australia Agriculture Victoria Grains Innovation Park110 Natimuk RoadHorshamVIC 3400Australia Department of Geosciences Boise State UniversityBoiseIDUSA

The structural integrity of mine dumps is crucial for mining operations to avoid adverse impacts on the triple *** temporal assessments of coal mine dumps are a compliant requirement to ensure design reconciliation as spoil off-loading continues over ***,the conventional in-situ coal spoil characterisation is inefficient,laborious,hazardous,and prone to experts'observation *** this end,this study explores a novel approach to develop automated coal spoil characterisation using unmanned aerial vehicle(UAV)based optical remote *** textural and spectral properties of the high-resolution UAV images were utilised to derive lithology and geotechnical parameters(i.e.,fabric structure and relative density/consistency)in the proposed *** raw images were converted to an orthomosaic using structure from motion aided ***,structural descriptors were computed per pixel to enhance feature modalities of the spoil ***,machine learning algorithms were employed with ground truth from experts as training and testing data to characterise spoil rapidly with minimal human *** characterisation accuracies achieved from the proposed approach manifest a digital solution to address the limitations in the conventional characterisation approach.

关键词： Lithology Fabric structure Consistency/relative density Dimensionality reduction Supervised learning algorithms

Aerosol printing and photonic sintering of bioresorbable zinc nanoparticle ink for transient electronics manufacturing

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Science China(Information Sciences) 2018年第6期61卷 40-49页

作者： bikram Kishore MAHAJAN BrANDon LUDWIG Wan SHOU Xiaowei YU Emmanuel FREGENE Hang XU Heng PAN Xian HUANG Department of Mechanical Engineering Missouri University of Science and Technology Department of Material Science and Engineering Georgia Institute of Technology Department of Biomedical Engineering Tianjin University

Bioresorbable electronics technology can potentially lead to revolutionary applications in healthcare, consumer electronics, and data security. This technology has been demonstrated by various functional devices. However, majority of these devices are realized by CMOS fabrication approaches involving complex and time-consuming processes that are high in cost and low in yield. Printing electronics technology represents a series of printing and post processing techniques that hold promise to make high performance bioresorbable electronics devices. But investigation of printing approaches for bioresorbable electronics is very limited. Here we demonstrate fabrication of conductive bioresorbable patterns using aerosol printing and photonic sintering approaches. Experimental results and simulation reveals that ink compositions, photonic energy, film thickness, and ventilation conditions may influence the effect of photonic sintering. A maximum conductivity of 22321.3 S/m can be achieved using 1 flash with energy of 25.88 J/cm~2 with duration of 2 ms. By combining two cascaded sintering procedures using flash light and laser further improve the conductivity to 34722.2 S/m. The results indicate that aerosol printing and photonic sintering can potentially yield mass fabrication of bioresorbable electronics, leading to prevalence of printable bioresorbable technology in consumer electronics and biomedical devices.

关键词： bioresorbable electronics photonic sintering aerosol printing transient electronics printed electronics zinc nanoparticles

Interacting system NGC 7805/6(Arp 112)and its tidal dwarf galaxy candidate

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Research in Astronomy and Astrophysics 2021年第2期21卷 149-156页

作者： Zhen-Xing Fu Chandreyee Sengupta Ramya Sethuram bikram Pradhan Mridweeka Singh Kuntal Misra TomCScott Yin-Zhe Ma Purple Mountain Observatory(CAS) Nanjing 210034China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Indian Institute of Astrophysics KoramangalaBangalore 560034India Aryabhatta Research Institute of Observational Sciences Manora PeakNainital 263001India Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astrophysics and Space Sciences(IA) Rua das Estrelas4150-762 PortoPortugal School of Chemistry and Physics University of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban4000South Africa NAOC-UKZN Computational Astrophysics Centre(NUCAC) University of KwaZulu-NatalDurban4000South Africa

We present results from our Giant Metrewave Radio Telescope(GMRT)HⅠ,Himalayan Chandra Telescope(HCT)Hα,1 m Sampurnanand Telescope(ST)and 1.3 m Devasthal Fast Optical Telescope(DFOT)deep optical observations of the NGC 7805/6(Arp 112)system to test KUG 2359+311’s tidal dwarf galaxy(TDG)candidacy and explore the properties of the interacting *** GMRT HⅠmap shows no HⅠdetection associated with KUG 2359+311,nor any HⅠtail or bridge-like structure connecting KUG 2359+311 to the NGC 7805/6 *** HCT Hαimage,on the other hand,displays strong detections in KUG 2359+311,with net SFR0.035±0.009 M_(⊙)yr^(-1).The Hαdata constrain the redshift of KUG 2359+311 to 0.00≤z≤0.043,compared to the redshift of NGC 7806 *** detected to date have all been HⅠrich,and displayed HⅠ,ionised gas and stellar tidal debris trails(bridges or tails)linking them to their parent ***,neither our HⅠdata nor our optical imaging,while three magnitudes deeper than SDSS,reveals a tidal trail connecting KUG 2359+311 to NGC 7805/*** of HⅠ,presence of an old stellar population,ongoing star formation and reasonably high SFR compared to normal dwarf galaxies suggest that KUG 2359+311 may not be an Arp 112 *** is most likely a case of a regular gas-rich dwarf galaxy undergoing a morphological transformation after having lost its entire gas content to an interaction with the Arp 112 *** and metallicity from future spectroscopic observations of KUG 2359+311 would help clarify the nature of this enigmatic structure.

关键词： galaxies dwarf-galaxies interactions-galaxies spiral-galaxies star formation-galaxies peculiar-radio lines galaxies

Predicting the Impact of Climate Change on Vulnerable Species in Gandaki River Basin,Central Himalayas

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Journal of Resources and Ecology 2022年第2期13卷 173-185页

作者： Raju RAI ZHANG Yili LIU Linshan Paras bikram SINGH Basanta PAUDEL Bipin Kumar ACHARYA Narendra Raj KHANAL Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Kathmandu Center for Research and Education Chinese Academy of Sciences-Tribhuvan UniversityKathmandu 44613Nepal Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of ScienceGuangzhou 510260China Biodiversity Conservation Society Nepal Lalitpur 44700Nepal Department of Epidemiology School of Public HealthSun Yat-Sen UniversityGuangzhou 510275China

Gandaki River Basin(GRB)is an important part of the central Himalayan region,which provides habitat for numerous wild ***,climatic changes are making the habitat in this basin more *** paper aims to assess the potential impacts of climate change on the spatial distributions of habitat changes for two vulnerable species,Himalayan black bear(Ursus thibetanus laniger)and common leopard(Panthera pardus fusca),using the maximum entropy(Max Ent)species distribution *** occurrence locations were used along with several bioclimatic and topographic variables(elevation,slope and aspect)to fit the model and predict the potential distributions(current and future)of the *** results show that the highly suitable area of Himalayan black bear within the GRB currently encompasses around 1642 km^(2)(5.01%area of the basin),which is predicted to increase by 51 km^(2) in the future(2050).Similarly,the habitat of common leopard is estimated as 3999 km^(2)(12.19%of the GRB area),which is likely to increase to 4806 km^(2) in ***,the habitat of Himalayan black bear is predicted to increase in the eastern part(Baseri,Tatopani and north from Bhainse)and to decrease in the eastern(Somdang,Chhekampar),western(Burtibang and Bobang)and northern(Sangboche,Manang,Chhekampar)parts of the study ***,the habitat of common leopard is projected to decrease particularly in the eastern,western and southern parts of the basin,although it is estimated to be extended in the southeastern(Bhainse),western(Harichaur and northern Sandhikhark)and north-western(Sangboche)parts of the *** determine the habitat impact,the environmental variables such as elevation,Bio 15(precipitation seasonality)and Bio 16(precipitation of wettest quarter)highly contribute to habitat change of Himalayan black bear;while Bio 13(precipitation of wettest month)and Bio 15 are the main contributors for common ***,this study predicted that the suitable habita

关键词： climate change habitat change Himalayan black bear(Ursus thibetanus laniger) common leopard(Panthera pardus fusca) Gandaki River Basin

Monitoring the impact of climate change and human activities on grassland vegetation dynamics in the northeastern Qinghai-Tibet Plateau of China during 2000–2015

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Journal of Arid Land 2019年第5期11卷 637-651页

作者： XIONG Qinli XIAO Yang Marwa Waseem A HALMY Mohammed A DAKHIL LIANG Pinghan LIU Chenggang ZHANG Lin bikram PANDEY PAN Kaiwen Sameh B EL KAFRAWAY CHEN Jun CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China College of Biology and Environmental Sciences Jishou UniversityJishou 416000China Department of Environmental Science Faculty of ScienceAlexandria UniversityAlexandria 21511Egypt University of Chinese Academy of Sciences Beijing 100039China Botany and Microbiology Department Faculty of ScienceHelwan UniversityCairo 11790Egypt School of Government Sun Yat-sen UniversityGuangzhou 510275China CAS Key Laboratory of Tropical Plant Resources and Sustainable Use Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglun 666303China National Authority for Remote Sensing and Space Sciences Cairo 11790Egypt

Climate change and human activities can influence vegetation net primary productivity(NPP), a key component of natural ecosystems. The Qinghai-Tibet Plateau of China, in spite of its significant natural and cultural values, is one of the most susceptible regions to climate change and human disturbances in the world. To assess the impact of climate change and human activities on vegetation dynamics in the grassland ecosystems of the northeastern Qinghai-Tibet Plateau, we applied a time-series trend analysis to normalized difference vegetation index(NDVI) datasets from 2000 to 2015 and compared these spatiotemporal variations with trends in climatic variables over the same time period. The constrained ordination approach(redundancy analysis) was used to determine which climatic variables or human-related factors mostly influenced the variation of NDVI. Furthermore, in order to determine whether current conservation measures and programs are effective in ecological protection and reconstruction, we divided the northeastern Qinghai-Tibet Plateau into two parts: the Three-River Headwater conservation area(TRH zone) in the south and the non-conservation area(NTRH zone) in the north. The results indicated an overall(73.32%) increasing trend of vegetation NPP in grasslands throughout the study area. During the period 2000–2015, NDVI in the TRH and NTRH zones increased at the rates of 0.0015/a and 0.0020/a, respectively. Specifically, precipitation accounted for 9.2% of the total variation in NDVI, while temperature accounted for 13.4%. In addition, variation in vegetation NPP of grasslands responded not only to long-and short-term changes in climate, as conceptualized in non-equilibrium theory, but also to the impact of human activities and their associated perturbations. The redundancy analysis successfully separated the relative contributions of climate change and human activities, of which village population and agricultural gross domestic product were the two most impor

关键词： climate change human activities NDVI variation Qinghai-Tibet Plateau redundancy analysis vegetation net primary productivity