Literatura académica sobre el tema "Vedchhi Intensive Area Scheme"
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Artículos de revistas sobre el tema "Vedchhi Intensive Area Scheme"
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Ferraz Filho, Antonio Carlos, José Roberto Soares Scolforo, Antonio Donizette de Oliveira y José Márcio de Mello. "Modeling growth and yield of loblolly pinestands under intensive management". Pesquisa Agropecuária Brasileira 50, n.º 8 (agosto de 2015): 707–17. http://dx.doi.org/10.1590/s0100-204x2015000800009.
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Abstract:The objective of this work was to develop and validate a prognosis system for volume yield and basal area of intensively managed loblolly pine (Pinus taeda) stands, using stand and diameter class models compatible in basal area estimates. The data used in the study were obtained from plantations located in northern Uruguay. For model validation without data loss, a three-phase validation scheme was applied: first, the equations were fitted without the validation database; then, model validation was carried out; and, finally, the database was regrouped to recalibrate the parameter values. After the validation and final parameterization of the models, a simulation of the first commercial thinning was carried out. The developed prognosis system was precise and accurate in estimating basal area production per hectare or per diameter classes. There was compatibility in basal area estimates between diameter class and whole stand models, with a mean difference of -0.01 m2ha-1. The validation scheme applied is logic and consistent, since information on the accuracy and precision of the models is obtained without the loss of any information in the estimation of the models' parameters.
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Zhang, Long, Jianhua Hu, Xinzhong Wang, Xiuwei Chai y Lei Zhao. "Collaborative Mining Sequence Optimization for Multiple Stopes under Intensive Mining". Advances in Civil Engineering 2021 (1 de abril de 2021): 1–8. http://dx.doi.org/10.1155/2021/6683157.
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The optimization of a mining sequence not only reduces stress concentration in surrounding rock but also prevents underground debris flows, significantly improving safety. Firstly, the 870–898 m level of the eastern mining area in the Tiaoshuihe phosphate mine was divided into 25 ore blocks, and six different mining sequences were designed for this area. Then, it was calculated that five ore blocks must be processed simultaneously to reach the annual production output. The distances between the five simultaneously mined ore blocks will inevitably affect the efficiency of the equipment for any scheme. So, a collaborative model considering both the area stability and production capacity was established by combining the distance between the centers of the five ore blocks as an index. Differences in stability, deformation, and plastic zone size between the schemes are compared. The calculation results show that a mining scheme with a convex stepped shape produces the best results. These results provide a general method for entropy-based mining sequence optimization and an optimal solution for the Tiaoshuihe phosphate mine.
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Shelef, G., Y. Azov, A. Kanarek, G. Zac y A. Shaw. "The dan region sewerage wastewater treatment and reclamation scheme". Water Science and Technology 30, n.º 9 (1 de noviembre de 1994): 229–38. http://dx.doi.org/10.2166/wst.1994.0486.
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The Greater Tel-Aviv (Dan Region) urban area is composed of seven municipalities producing close to 100 million cubic meters per year (mcmy) of wastewaters, serving a population equivalent of over 1.7 millions. The Dan Region Association of Towns for Sewerage serves the largest population, commercial and tourism center of Israel as well as an important part of its industry. The flow of wastewater in the region is expected to reach some 150 mcmy by the end of this decade due to its intensive growth. Due to the perennial and severe shortage of water, Israel has adopted a national policy of maximizing wastewater reuse, aimed principally at agricultural irrigation of crops without any restrictions (including fruits and vegetables eaten uncooked). The quality requirements for the reclaimed wastewater are quite stringent, due to the fact that a large proportion of the agricultural produce is intended for export to foreign countries. The Dan Region - Third Line scheme is an example of a holistic approach to urban sewerage system integrated with reclamation and agricultural reuse, within an overall policy-making, engineering design, operation, monitoring, surveillance, management, administration and legal framework. It has a combined health, environmental and economical benefit to the urban communities and critical economic and livelihood benefit to the rural community.
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Berkhoff, K. "Groundwater vulnerability assessment to assist the measurement planning of the water framework directive – a practical approach with stakeholders". Hydrology and Earth System Sciences Discussions 4, n.º 3 (25 de mayo de 2007): 1133–51. http://dx.doi.org/10.5194/hessd-4-1133-2007.
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Abstract. An evaluation scheme is presented in this paper which can be used to assess groundwater vulnerability according to the requirements of the European Water Framework Directive (WFD). The evaluation scheme results in a groundwater vulnerability map identifying areas of high, medium and low vulnerability, as necessary for the measurement planning of the WFD. The evaluation scheme is based on the definition of the vulnerability of the Intergovernmental Panel on Climate Change (IPCC). It considers exposure, sensitivity and the adaptive capacity of the region. The adaptive capacity is evaluated in an actors' platform, which was constituted for the region in the PartizipA ("Participative modelling, Actor and Ecosystem Analysis in Regions with Intensive Agriculture") project. As a result of the vulnerability assessment, 21% of the catchment area was classified as being highly vulnerable, whereas 73% has medium vulnerability and 6% has low vulnerability. Thus, a groundwater vulnerability assessment approach is presented, which can be used in practice on a catchment scale for the WFD measurement planning.
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Cholakian, Arineh, Matthias Beekmann, Augustin Colette, Isabelle Coll, Guillaume Siour, Jean Sciare, Nicolas Marchand et al. "Simulation of fine organic aerosols in the western Mediterranean area during the ChArMEx 2013 summer campaign". Atmospheric Chemistry and Physics 18, n.º 10 (25 de mayo de 2018): 7287–312. http://dx.doi.org/10.5194/acp-18-7287-2018.
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Abstract. The simulation of fine organic aerosols with CTMs (chemistry–transport models) in the western Mediterranean basin has not been studied until recently. The ChArMEx (the Chemistry-Aerosol Mediterranean Experiment) SOP 1b (Special Observation Period 1b) intensive field campaign in summer of 2013 gathered a large and comprehensive data set of observations, allowing the study of different aspects of the Mediterranean atmosphere including the formation of organic aerosols (OAs) in 3-D models. In this study, we used the CHIMERE CTM to perform simulations for the duration of the SAFMED (Secondary Aerosol Formation in the MEDiterranean) period (July to August 2013) of this campaign. In particular, we evaluated four schemes for the simulation of OA, including the CHIMERE standard scheme, the VBS (volatility basis set) standard scheme with two parameterizations including aging of biogenic secondary OA, and a modified version of the VBS scheme which includes fragmentation and formation of nonvolatile OA. The results from these four schemes are compared to observations at two stations in the western Mediterranean basin, located on Ersa, Cap Corse (Corsica, France), and at Cap Es Pinar (Mallorca, Spain). These observations include OA mass concentration, PMF (positive matrix factorization) results of different OA fractions, and 14C observations showing the fossil or nonfossil origins of carbonaceous particles. Because of the complex orography of the Ersa site, an original method for calculating an orographic representativeness error (ORE) has been developed. It is concluded that the modified VBS scheme is close to observations in all three aspects mentioned above; the standard VBS scheme without BSOA (biogenic secondary organic aerosol) aging also has a satisfactory performance in simulating the mass concentration of OA, but not for the source origin analysis comparisons. In addition, the OA sources over the western Mediterranean basin are explored. OA shows a major biogenic origin, especially at several hundred meters height from the surface; however over the Gulf of Genoa near the surface, the anthropogenic origin is of similar importance. A general assessment of other species was performed to evaluate the robustness of the simulations for this particular domain before evaluating OA simulation schemes. It is also shown that the Cap Corse site presents important orographic complexity, which makes comparison between model simulations and observations difficult. A method was designed to estimate an orographic representativeness error for species measured at Ersa and yields an uncertainty of between 50 and 85 % for primary pollutants, and around 2–10 % for secondary species.
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de Tapia, Emily McClung, Irma Domínguez Rubio, Jorge Gama Castro, Elizabeth Solleiro y Sergey Sedov. "Radiocarbon Dates from Soil Profiles in the Teotihuacán Valley, Mexico: Indicators of Geomorphological Processes". Radiocarbon 47, n.º 1 (2005): 159–75. http://dx.doi.org/10.1017/s0033822200052279.
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Radiocarbon dates largely obtained from bulk soil samples in 24 soil profiles in the Teotihuacán Valley, Mexico, are reported insofar as they represent a first step towards developing a sequence of soil formation, erosion, vegetation change, and human impact during the Holocene. Limitations of 14C dating in the area are considered, particularly the absence of charcoal in sediments and poor preservation of pollen. A broad temporal scheme is proposed to guide future research in which 4 periods are defined: ∼5000–2000 BP (relative stability with short, intermittent episodes of erosion); ∼2000–1500 BP (erosion-sedimentation, deforestation, and intensive agriculture); ∼1500–1000 BP (relative stability, depopulation, and partial recovery of the landscape); and ∼1000–500 BP (erosion-sedimentation, deforestation, and intensive agriculture).
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Wang, Kun, Pengju Zhang, Jiong Niu, Weifeng Sun, Lun Zhao y Yonggang Ji. "A Performance Evaluation Scheme for Multiple Object Tracking with HFSWR". Sensors 19, n.º 6 (21 de marzo de 2019): 1393. http://dx.doi.org/10.3390/s19061393.
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High-frequency surface wave radar (HFSWR) can detect and continuously track ship objects in real time and beyond the horizon. When ships navigate in a sea area, their motions in a time period form a scenario. The diversity and complexity of the motion scenarios make it difficult to accurately track ships, in which failures such as track fragmentation (TF) are frequently observed. However, it is still unclear how and to what degrees the motions of ships affect the tracking performance, especially which motion patterns can cause tracking failures. This paper addresses this problem and attempts to undertake a first step towards providing an intensive quantitative performance assessment and vulnerability detection scheme for ship-tracking algorithms by proposing an evolutionary and data-mining-based approach. Low-dimensional scenarios in terms of multiple maneuvering ship objects are generated using a grammar-based model. Closed-loop feedback is introduced using evolutionary computation to efficiently collect scenarios that cause more and more tracking performance loss, which provides diversified cases for analysing using data-mining technique to discover indicators of tracking vulnerability. Results on different tracking algorithms show that more cluster and convergence patterns and longer duration of our convoy and cluster patterns in the scenarios can cause severer TF to HFSWR ship tracking.
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Liao, Yangzhe, Quan Yu, Yi Han y Mark Leeson. "Relay-Enabled Task Offloading Management for Wireless Body Area Networks". Applied Sciences 8, n.º 8 (20 de agosto de 2018): 1409. http://dx.doi.org/10.3390/app8081409.
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Inspired by the recent developments of the Internet of Things (IoT) relay and mobile edge computing (MEC), a hospital/home-based medical monitoring framework is proposed, in which the intensive computing tasks from the implanted sensors can be efficiently executed by on-body wearable devices or a coordinator-based MEC (C-MEC). In this paper, we first propose a wireless relay-enabled task offloading mechanism that consists of a network model and a computation model. Moreover, to manage the computation resources among all relays, a task offloading decision model and the best task offloading recipient selection function is given. The performance evaluation considers different computation schemes under the predetermined link quality condition regarding the selected vital quality of service (QoS) metrics. After demonstrating the channel characterization and network topology, the performance evaluation is implemented under different scenarios regarding the network lifetime of all relays, network residual energy status, total number of locally executed packets, path loss (PL), and service delay. The results show that data transmission without the offloading scheme outperforms the offload-based technique regarding network lifetime. Moreover, the high computation capacity scenario achieves better performance regarding PL and the total number of locally executed packets.
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Fiddes, J. y S. Gruber. "TopoSUB: a tool for efficient large area numerical modelling in complex topography at sub-grid scales". Geoscientific Model Development 5, n.º 5 (10 de octubre de 2012): 1245–57. http://dx.doi.org/10.5194/gmd-5-1245-2012.
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Abstract. Mountain regions are highly sensitive to global climate change. However, large scale assessments of mountain environments remain problematic due to the high resolution required of model grids to capture strong lateral variability. To alleviate this, tools are required to bridge the scale gap between gridded climate datasets (climate models and re-analyses) and mountain topography. We address this problem with a sub-grid method. It relies on sampling the most important aspects of land surface heterogeneity through a lumped scheme, allowing for the application of numerical land surface models (LSMs) over large areas in mountain regions or other heterogeneous environments. This is achieved by including the effect of mountain topography on these processes at the sub-grid scale using a multidimensional informed sampling procedure together with a 1-D lumped model that can be driven by gridded climate datasets. This paper provides a description of this sub-grid scheme, TopoSUB, and assesses its performance against a distributed model. We demonstrate the ability of TopoSUB to approximate results simulated by a distributed numerical LSM at around 104 less computations. These significant gains in computing resources allow for: (1) numerical modelling of processes at fine grid resolutions over large areas; (2) efficient statistical descriptions of sub-grid behaviour; (3) a "sub-grid aware" aggregation of simulated variables to coarse grids; and (4) freeing of resources for computationally intensive tasks, e.g., the treatment of uncertainty in the modelling process.
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Enamul Quadir, Md Shahed y John A. Chandy. "Key Generation for Hardware Obfuscation Using Strong PUFs". Cryptography 3, n.º 3 (17 de julio de 2019): 17. http://dx.doi.org/10.3390/cryptography3030017.
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As a result of the increased use of contract foundries, internet protocol (IP) theft, excess production and reverse engineering are major concerns for the electronics and defense industries. Hardware obfuscation and IP locking can be used to make a design secure by replacing a part of the circuit with a key-locked module. In order to ensure each chip has unique keys, previous work has proposed using physical unclonable functions (PUF) to lock the circuit. However, these designs are area intensive. In this work, we propose a strong PUF-based hardware obfuscation scheme to uniquely lock each chip.
Capítulos de libros sobre el tema "Vedchhi Intensive Area Scheme"
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Bertulessi, Luca. "Frequency Synthesizers Based on Fast-Locking Bang-Bang PLL for Cellular Applications". En Special Topics in Information Technology, 27–36. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-62476-7_3.
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AbstractThe fractional-N frequency synthesis based on Digital Phase Locked Loop (DPLLs) has become a conventional design approach for the new radio wireless applications. The advantage of the digitally-intensive design style is the possibility to implement low-power and very accurate digital calibration techniques. Most of these algorithms run in the background tracking PVT variations and either relax or, in some cases, completely remove the performance limitations due to analog impairments. Moreover, the digital loop filter area is practically negligible with respect to the one in analog PLLs. These benefits become even more relevant in the scaled CMOS technology nodes. This chapter identifies the design parameters of a standard DPLL architecture and proposes a novel locking scheme to overcome the intrinsic limitations of the digital frequency synthesizers approach. To prove this new scheme a sub-6 GHz fractional-N synthesizer has been implemented in 65 nm CMOS. The synthesizer has an output frequency from 3.59 GHz to 4.05 GHz. The integrated output jitter is 182fs and the power consumption of 5.28 mW from 1.2 V power supply leads to a FoM of −247.5 dB. This topology exploits a novel locking technique that guarantee a locking time of 5.6 s, for a frequency step of 364 MHz, despite the use of a single bit phase detector.
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Israr, Nauman. "Energy Efficient Communication in Wireless Sensor Networks". En Wireless Sensor Networks and Energy Efficiency, 274–90. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0101-7.ch012.
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Longer life time is the primary goal of interest in Wireless Sensor Networks (WSNs). Communication dominates the power consumption among all the activities in WSNs. The classical sleep and wake up scheduling scheme at the application layer is believed to be one of the best power saving schemes for dense WSNs. These schemes reduce redundant transmissions, and as a result, prolong the network life time. This chapter analyzes the effect of density on inter cluster and intra cluster communication and evaluates a hybrid cross layer scheduling schemes to enhance the life time of the WSNs. In the conventional scheduling schemes at the application layer, all the nodes whose area are covered by their neighbors are put to sleep in order to prolong the life time of the WSNs. The hybrid cross layer scheme in this chapter suggests that instead of putting the redundant nodes to sleep if they are used for some other energy intensive tasks, for example the use of redundant nodes as relay stations in inter cluster communication, will be more energy efficient compare to the conventional application layer scheduling schemes in WSNs. Performance studies in the chapter indicate that the proposed communication strategy is more energy efficient than the conventional communication strategies that employ the sleep/wake up pattern at application layer.
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"Advances in Understanding Landscape Influences on Freshwater Habitats and Biological Assemblages". En Advances in Understanding Landscape Influences on Freshwater Habitats and Biological Assemblages, editado por Lindsey A. Bruckerhoff y Keith B. Gido. American Fisheries Society, 2019. http://dx.doi.org/10.47886/9781934874561.ch9.
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<i>Abstract.</i>—Linking landscape features, both natural and human-altered, to aquatic ecosystem structure and function is a fundamental objective in landscape ecology and freshwater science, but this process is data- and resource-intensive. Quantifying how landscape stressors influence aquatic communities requires balancing logistic and financial constraints with effectively sampling the landscape to capture gradients of interest. There are a variety of ways to balance these constraints, such as using existing data, handpicked site selection, or a statistical site-selection scheme. Poor sampling design reduces statistical power; however, we do not know how differences in site-selection designs influence our ability to measure ecological responses to landscape gradients. We quantified how the distribution of sample sites across landscape gradients affected the measured responses of stream fish assemblages to these gradients at different sample sizes. Specifically, we used randomization tests to compare the variability in the responses of fish assemblage structure (species richness and composition) to catchment area and land use (agricultural land) with manipulated distributions (random, highly skewed, and uniform) of sites across these landscape gradients. Assemblage composition was more sensitive than species richness to sampling design, and we observed less variability in the detected response of assemblage composition when samples were distributed uniformly across landscape gradients, especially when sample sizes were small. Although strong responses to environmental gradients, such as species richness to catchment area, are robust to sampling distributions, large sample size and a uniform distribution of samples might help elucidate more subtle responses to environmental gradients.
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Skrobala, Viktor y Sofiya Marutyak. "PECULIARITIES OF THE TERRITORY OF THE CITY OF LVIV (UKRAINE) AND THEIR INFLUENCE ON THE HYDROLOGICAL REGIME AND EROSION PROCESSES". En European vector of development of the modern scientific researches. Publishing House “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-077-3-28.
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The object of research is the territory of the city of Lviv (Ukraine). Lviv (geographical coordinates: 49N50, 24E00) is the largest city in Western Ukraine, with a population of over 720,000 inhabitants. The city is located in the western part of the Volyn-Podilska Upland, on the line of the Main European Ridge of the Baltic and Black Sea basins. Subject of research is relief parameters (maximum, average and minimum heights, vertical dismemberment and steepness of the surface) and land use characteristics (building intensity, phytocenotic cover). The purpose of research is to study the features of the territory of Lviv from the standpoint of influence on the hydrological regime and erosion processes. Methodology. Peculiarities of the territory of Lviv were studied by processing topographic maps using aerial photography materials and route surveys. Morphometric analysis of the relief was performed on topographic maps of scale 1: 10000 by dividing the map into elementary squares with an area of 0.25 km2. The research covers an area of 100.25 km2 (401 elementary squares). Within the elementary squares, the maximum, average and minimum heights of the territory, the depth of local erosion bases, the average surface steepness, the intensity and nature of construction, and the features of vegetation were determined. Results. The territory of Lviv is characterized by a variety of relief conditions and related nature of surface use. On the basis of morphometric maps of maximum and minimum heights, vertical dismemberment and steepness of the surface, we can distinguish the flat peripheral part of the city and the middle band of elevations. The asymmetry of the territory of Lviv in relation to the watershed causes various potential dangers of erosion processes and related unproductive moisture losses. The intensity of construction increases from the periphery to the center, with the exception of modern multi-storey buildings of the Sykhiv massif and industrial areas in the western part of the city. Low specific weight of waterproof coatings is characterized by the eastern and northern parts of the city with a complex relief. The largest amount of greenery is concentrated in the eastern part of the city (Vysokyi Zamok Park, Shevchenkivskyi grove, Pohulyanka Forest Park, Lychakiv), where surfaces with maximum relative heights predominate. The great variety of the underlying surface on the territory of Lviv causes different conditions for the formation of surface runoff and associated unproductive moisture consumption. The high potential danger of erosion processes is primarily noted by the structural-denudation level of Roztochia, which is characterized by the highest values of surface steepness. Complex relief conditions, intensive anthropogenic impact determine the need for anti-erosion organization of the city and measures aimed at optimizing hydrological processes. Scientific novelty. One of the criteria that characterizes the degree of landscape transformation within the city is the intensity of construction, which is determined by the proportion of watertight areas in the overall balance of the territory. Peculiarities of spatial arrangement of elementary plots with different intensity of construction in combination with relief parameters and land use scheme are determined. Practical significance. Knowing the parameters of the terrain and the peculiarities of land use, it is possible to determine the potential intensity of erosion processes in the territory of Lviv, to assess the level of anthropogenic changes in the hydrological regime.
Actas de conferencias sobre el tema "Vedchhi Intensive Area Scheme"
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Hasdemir, Mehmet y Mine Hasdemir. "Implementation of Environmentally Based Agricultural Land Protection Program in Turkey". En International Conference on Eurasian Economies. Eurasian Economists Association, 2016. http://dx.doi.org/10.36880/c07.01775.
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Agriculture, which includes many aspects like vegetative and animal production by utilization of soil and water resources and enhancement of efficiency and quality, has been considered the most environmentally-friendly sector up to date and meets nutritional demand of one fifth of world population. On the other hand, due to utilization of intensive input for maximization of yield per unit area of land, agriculture has become a sector which may also result negative impacts on the environment. For this reason, environmentally-friendly agricultural policies have started to be implemented in many countries besides the implementation of policies based on increased agricultural production. In this context, Environmentally Based Agricultural Land Protection (ÇATAK) Program has started to be implemented in Turkey since 2006 for protection of soil and water quality, prevention of erosion and mitigation of agriculture-derived negative impacts. The Program is executed by the Ministry of Food and Agriculture. Within this scope, environmentally-friendly practices are being supported by awarding grants to the beneficiary farmers. This study aims to address the extent to which implementation of ÇATAK Program has contributed to land protection based on a review of environmentally-friendly agricultural practices and beneficiary activities. Additionally, the place of environmental subsidy is assessed within the agricultural funding scheme being implemented in Turkey.
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Bohn, Dieter, Karsten Kusterer y Harald Schönenborn. "3-D Numerical Simulation of the Flow Through a Turbine Blade Cascade With Cooling Injection at the Leading Edge". En ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-150.
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High process efficiencies and high power-weight ratios are two major requirements for the economic operation of present day gas turbines. This development leads to extremely high turbine inlet temperatures and adjusted pressure ratios. The permissible hot gas temperature is limited by the material temperature of the blade. Intensive cooling is required to guarantee an economically acceptable life of the components which are in contact with the hot gas. Although film-cooling has been successfully in use for a couple of years along the suction side and pressure side, problems occur in the vicinity of the stagnation point due to high stagnation pressures and opposed momentum fluxes. In this area basic investigations are necessary to achieve a reliable design of the cooled blade. In the present calculations, a code for the coupled simulation of fluid flow and heat transfer in solid bodies is employed. The numerical scheme works on the basis of an implicit finite volume method combined with a multi-block technique. The full, compressible 3-D Navier-Stokes equations are solved within the fluid region and the Fourier equation for beat conduction is solved within the solid body region. An elliptic grid generator is used for the generation of the structured computational grid, which is a combination of various C-type and H-type grids. Results of a 3-D numerical simulation of the flow through a turbine blade cascade with and without cooling ejection at the leading edge through two slots are presented. The results are compared with 2-D numerical simulations and experimental results. It is shown that the distribution of the coolant on the blade surface is influenced by secondary flow phenomena which can not be taken into account by the 2-D simulations. Further coupled simulations with non-adiabatic walls in the leading edge region are performed with realistic temperature ratios and compared to the same case with adiabatic walls. It is shown that in the case of non-adiabatic walls the temperature on the blade wall is significantly lower than in the case of adiabatic walls.