Application of Graph Theory in Grain and Oil Deployment

Author(s): Guangshu Xu, Zilong Song

The deployment of grain and oil is related to the daily needs of people and the stability of society. In this paper, we take the shortest path problem and the minimum cost maximum flow problem in graph theory as the theoretical basis. Through the establishment of distance matrix between the reserves station and the deployment warehouse or between reserve station and reserve station, we use the Continue reading

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Sigma-Point Filters in Robotic Applications

Author(s): Mohammad Al-Shabi


Sigma-Points for n = 2 [31].
Sigma-Points for n = 2 [31].
Sigma-Point Kalman Filters (SPKFs) are popular estimation techniques for high nonlinear system applications. The benefits of using SPKFs include (but not limited to) the following: the easiness of linearizing the nonlinear matrices statistically without the need to use the Jacobian matrices, the ability to handle more uncertainties than the Extended Kalman Filter (EKF), the ability to handle different types of noise, having less computational time than the Particle Filter (PF) and most of the adaptive techniques which makes it suitable for online applications Continue reading

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A Model for Measuring Geographic Information Systems Success

Author(s):Khalid A. Eldrandaly, Soaad M. Naguib, Mohammed M. Hassan

Geographic Information Systems (GIS) have become a fact of our life as they are being used by more people and organizations for more complex decision problems than ever before. The use of GIS can achieve valuable benefits for individuals, organizations and society; however, the achievement of these benefits depends on the success of GIS. While information systems (IS) success models have received much attention among researchers, there is a general scarcity of research conducted to measure the GIS success. This paper proposes a success model for measuring GIS Continue reading

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Associations of Jet Streams with Tornado Outbreaks in the North America

Author(s):Igor G. Zurbenko, Mingzeng Sun

28143826b20oJet streams, a current of fast winds located about seven miles up near the tropopause, are major weather driving factors in the mid-latitudes. Using the Modern-Era Retrospective Analysis for Research and Applications (MERRA) reanalysis data resources for the period 1979 to 1988, we defined the latitudinal distribution of daily wind maxima by month, and analyzed latitudinal distribution of the highest daily wind speed at the selected longitude in the 19th week of the year. We showed the typical diving pattern Continue reading

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Catastrophic Debrisflow in Dariali (Georgia) in the Year 2014

Author(s): George Gaprindashvili, Merab Gaprindashvili


Debrisflow source area.
Debrisflow source area.

River Tergi, Aragvi and Asa-Arghuni, which occupy significant area of mountainous region of central Caucasus, by its geographic location, strategic meaning, peculiarities of natural landscape and infrastructural objects (Trans-Caucasian highway, gas pipeline, water supply of the capital, Gudauri ski-mountainous complex) minerals, historic-ethnographic monuments, opportunities for development of mountainous tourism and mountaineering, where more important engineering projects are being planned; all the above give perspective Continue reading

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Simulating Ocean and Tidal Current Power Plants with Homer

Author(s):Andrea Fischer, Jones S. Silva, Alexandre Beluco, Luiz Emílio B. Almeida

The oceans can provide us with several direct sources of renewable energy, such as wave energy, energy from currents and energy in thermal gradients among other energy resources. The uses of these resources have not yet reached technical and economic maturity, but they have experienced significant advances in recent years. In this process, tools for feasibility analysis of hybrid systems including Continue reading

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The Application Research on DOI in the Digital Publication of Chinese Sci-Tech Journals

Author(s): Ting Dai

DOI, Digital Object Identifier, has been pervasively applied in digital information resources overseas and becomes an international standard, while in China it’s still on the initial stage. This article discusses the application of DOI in the digital publication of Chinese sci-tech journals, and analyzes the problems, such as inadequate attention, lack of engagement, unsatisfactory application and so on, as well as the countermeasures. Giving the lifting effects of DOI on the digitalizing and networking Continue reading

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A Simulation of Signal Collisions over the North Atlantic for a Spaceborne ADS-B Receiver Using Aloha Protocol

Author(s):Richard Van Der Pryt, Ron Vincent


CanX-7 ADS-B receiver reception coverage (circle) with −103 dBm sensitivity at 800 km altitude (AGI STK Software).
CanX-7 ADS-B receiver reception coverage (circle) with −103
dBm sensitivity at 800 km altitude (AGI STK Software).

Automatic Dependent Surveillance-Broadcast (ADS-B) is an air traffic surveillance system in which aircraft broadcast GPS position, velocity and status on 1090 MHz at random intervals between 0.4 and 0.6 seconds. ADS-B networks for air traffic monitoring have been implemented worldwide, but ground stations cannot be installed in oceanic regions, leaving these areas uncovered. A solution for tracking aircraft over the ocean is through the monitoring of ADS-B signals by using spaceborne receivers. The Royal Military College of Canada has developed an ADS-B receiver that is scheduled to fly as a technology demonstrator on the Canadian Advanced Nanospace eXperiment-7 (CanX-7) nanosatellite. The payload will collect ADS-B data over the North Continue reading

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Petroleum Patent Used Such Monitoring Technological Like Innovation Process of Drilling Fluids with Xanthan Gum —World Panorama

Author(s):Marco Antonio Martins de Oliveira, Cheila Gonçalves Mothé, Leandra Guimarães de Oliveira


Scientific publications of drilling fluid with xanthan by country: 1974-2014
Scientific publications of drilling fluid with xanthan by country: 1974-2014

This paper aims to discuss the importance of patenting and publishing as an instrument of incentive to technological innovation in the petroleum chemistry area. The present study has examined the publications and the patent applications published from 1974 to 2014. A technological monitoring methodology for patents in drilling fluid with xanthan gum has been compared using profiles of patent application in the world, with emphasis on Industrial Property Continue reading

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Cats Infected by Feline Leukemia Virus—Morpho-Quantitative Evaluation of the Thymus

Author(s): Flávia Azevedo Cavalcanti de Melo, Anna Clara dos Santos, Kaique Nogueira, André Rodrigues da Cunha Barreto-Vianna, Eduardo Maurício Mendes de Lima

The feline leukemia virus (FeLV) is a complex disease that affects mainly the immune and hematological systems of cats. And because the thymus was closely associated with the immune system, the aim of this study was to quantify the morphological changes in the thymus of naturally infected and uninfected animals. Thymus morphological changes were evaluated by quantifying the following parameters: thymocytes, fat tissue, thymic corpuscles, connective tissue, and type I and III collagen. Continue reading

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