Relevant bibliographies by topics / Coefficient of quantity proportion

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Coefficient of quantity proportion'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Coefficient of quantity proportion"

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Tu, Qunzi, Yongwen Yang, Hanying Huang, Lu Li, Shanbai Xiong, and Siming Zhao. "Quantity Prediction of Mixed Freshwater Fish Based on Passive Underwater Acoustic Signals." Transactions of the ASABE 63, no. 6 (2020): 1805–11. http://dx.doi.org/10.13031/trans.13495.

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HighlightsThe use of passive underwater acoustic technology to estimate the species and quantity of freshwater fish provides a theoretical basis for effectively estimating the quantity of freshwater aquaculture.Mixed proportion recognition models for breams and crucians were built using probabilistic neural network (PNN) and support vector machine (SVM), and the influences of different super-parameters on the recognition rate were analyzed. The results showed that the classification model established with SVM after equiripple filtering was best.Mixed quantity prediction models for breams and c
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Tilahun, Meseret, Nabi Husein, and Dawit Abate. "Effects of Seed Proportion on Forage Yield of Greenleaf Desmodium (<i>Desmodium intortum)</i> and Guinea Grass (<i>Panicum maximum)</i> Mixture at Adami Tulu Agricultural Research Center." American Journal of BioScience 12, no. 4 (2024): 110–17. http://dx.doi.org/10.11648/j.ajbio.20241204.12.

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Establishing of grass-legume pastures is one of the recognized strategies for enhancing both quantity and quality of feed resources. Therefore, determining the impact of seed proportion on the nutritional qualities and forage yield of combinations of guinea grass and green leaf desmodium is the goal of this study. A Randomized Complete Block Design (RCBD) with three replications was used to arrange five seed proportions of desmodium and guinea grass. Analysis of variance revealed that variations in treatments have significant differences (p<0.05) on panicum heights, desmodium tillers, a
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Yao, Shao Wei, Chang Rui Wang, and Zhen Guo Gao. "The Research on Dense Packing Concrete Mix Proportion." Advanced Materials Research 287-290 (July 2011): 1043–47. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1043.

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According to the postulation on dense packing of aggregates, the paper discusses the dense packing method of various aggregates and its coefficients, and offers the mix proportion design method of concrete. The research results indicate that using method of the mix proportion design based on the theory on dense packing of aggregates, aggregates can play a maximum role, especially the micro-aggregate effect of the fly ash, then the compactness of concrete is raised effectively, the quantity of cement is reduced and the endurance of concrete is improved.
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Li, Weiwen, Yongcong Liu, Jie Li, Longfang Ye, and Qing Huo Liu. "Modal Proportion Analysis in Antenna Characteristic Mode Theory." International Journal of Antennas and Propagation 2019 (February 13, 2019): 1–10. http://dx.doi.org/10.1155/2019/7069230.

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The characteristic mode theory (CMT) can provide physically intuitive guidance for the analysis and design of antenna structures. In CMT applications, the antenna current distribution is decomposed into the superposition of multiple characteristic modes, and the proportion of each current mode is characterized by the modal weighting coefficient (MWC). However, different characteristic currents themselves have different radiation efficiencies reflected by the eigenvalues. Therefore, from the perspective of the contribution to the radiation field, the modal proportion should be more accurately d
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Mu, Jie, Miansong Huang, Xiaoli Hao, Xiaolan Chen, Haijun Yu, and Binbin Wu. "Study on Waterlogging Reduction Effect of LID Facilities in Collapsible Loess Area Based on Coupled 1D and 2D Hydrodynamic Model." Water 14, no. 23 (2022): 3880. http://dx.doi.org/10.3390/w14233880.

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The accurate evaluation method of LID toward the attenuation of urban flood is still a hot issue. This paper focuses on a coupled 1D and 2D hydrodynamic model, investigating the model parameters set in a collapsible loess area, and the changes in the surface runoff, waterlogged area, and drainage network indicators under different rainfall patterns. The results show that the coupled model can effectively simulate the effect of LID facilities under unaltered and retrofitted conditions. It is found that the infiltration parameters in a collapsible loess area are higher than in other eastern citi
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Kayode-Ojo, N., and J. O. Odemerho. "The Particle Size Distribution of Laterite Soil at Ekosodin, Benin City, Nigeria." Journal of Applied Sciences and Environmental Management 27, no. 3 (2023): 519–23. http://dx.doi.org/10.4314/jasem.v27i3.15.

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The laterite soil particle-size distribution provides a preliminary knowledge of the rate of failure and the strength of soil to resist load pressure and subsequent susceptibility to gully erosion. This study was carried out to determine the particle size distribution of laterite soil at Ekosodin, Benin City, Nigeria using appropriate standard methods. This was achieved by collecting a total of twenty soil samples from the gully zone of Ekosodin and carrying out sieve and hydrometer analyses on the recovered soil. The average percentage weight of fines smaller than the following grain diameter
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Han, Shaoyong, Jianli Luo, Letian Zeng, Cuihua Xie, Guan Yang, and Jingchun Zhan. "FROM THE PERSPECTIVE OF EMOTIONAL LABOR AND WORK PRESSURE, THIS PAPER DISCUSSES HOW JOINT ORDERING STRATEGY CAN IMPROVE THE PSYCHOLOGICAL SAFETY OF SUPPLY CHAIN MEMBERS." International Journal of Neuropsychopharmacology 25, Supplement_1 (2022): A34—A35. http://dx.doi.org/10.1093/ijnp/pyac032.048.

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Abstract Background It is of great economic significance to optimize the total cost of supply chain and improve the performance of supply chain. Information sharing can improve supply chain performance. A probabilistic demand system with one seller and one buyer studied by scholars can find that compared with the traditional decentralized system, the quantity coordination strategy can improve the performance of the supply chain. However, supply chain members are reluctant to provide private cost information because their customers may abuse this information, which will seriously affect their p
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Yamaguchi, Yoshiyuki, and Yutaka Asako. "Effect of Partition Wall on Natural Convection Heat Transfer in a Vertical Air Layer." Journal of Heat Transfer 123, no. 3 (2001): 441–49. http://dx.doi.org/10.1115/1.1370515.

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Three-dimensional natural convection heat transfer characteristics in a vertical air layer partitioned into cubical enclosures by partition walls of finite thermal conductivity and finite thickness were obtained numerically. The air layer is differentially heated from each surface. In this work, the analyses were performed using finite thickness and finite conductivity of the partition wall for Ra=104 and 105, and for wide range of the thickness and the conductivity of the partition wall. The results were presented in the form of overall convection and total heat transfer coefficient. From the
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Żórawski, Wojciech, Anna Góral, Medard Makrenek, Dominika Soboń, Anna Trelka, and Marek Bara. "Optimization of Mechanical Properties of Cr3C2-Ni20Cr/Graphite Cold Sprayed Coatings." Materials 14, no. 13 (2021): 3458. http://dx.doi.org/10.3390/ma14133458.

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This study analyzed the mechanical properties of cold-sprayed Cr3C2-25(Ni20Cr) blended with Ni-graphite as a solid lubricant deposited on 7075 aluminum alloy substrate. To optimize the coating properties, different sets of parameters (graphite content in feedstock, process gas composition, spraying distance, and traverse gun speed) were tested in the frame of the Taguchi experiment. The cold-sprayed coatings were evaluated for their chromium carbide and graphite content, hardness, and coefficient of friction. Analysis of the microstructure of the deposited coatings revealed that graphite as a
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Wang, Liang, Mingdong Ji, Kang Wu, Xudong Weng, and Haijun Li. "Design and Performance Evaluation of a Feed Distribution Device in the Small-Scale Pneumatic Conveying Feeder for Recirculating Aquaculture Systems." Fishes 10, no. 6 (2025): 255. https://doi.org/10.3390/fishes10060255.

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Due to its good adaptability, the pneumatic conveying feeder has been widely developed and applied in recirculating aquaculture systems (RASs). Its important performances include the integrity of feed pellets and the feeding accuracy. The aim of this study was to design and evaluate a feed distribution device for a small-scale pneumatic conveying feeder. A cylindrical hopper with a feed capacity of 4 kg and a feed distribution device were designed based on theoretical calculations. The motion and force of feed pellets during the distribution process were studied using the discrete element meth
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Dissertations / Theses on the topic "Coefficient of quantity proportion"

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Воронець, Л. П. "Оптимізаційна модель розподілу навчального часу студентів". Thesis, Довкілля, 2009. http://essuir.sumdu.edu.ua/handle/123456789/60177.

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Подано математичну оптимізаційну модель розподілу навчального часу студентів між лекційними, семінарсько-практичними та лабораторними заняттями<br>The mathematical optimization model of the distribution of teaching time between lectures, seminars, practical and laboratory classes
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Jung, Aekyung. "Interval Estimation for the Correlation Coefficient." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/math_theses/109.

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The correlation coefficient (CC) is a standard measure of the linear association between two random variables. The CC plays a significant role in many quantitative researches. In a bivariate normal distribution, there are many types of interval estimation for CC, such as z-transformation and maximum likelihood estimation based methods. However, when the underlying bivariate distribution is unknown, the construction of confidence intervals for the CC is still not well-developed. In this thesis, we discuss various interval estimation methods for the CC. We propose a generalized confidence interv
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Bassu, Sébastien. ""Métron", entre "logos" et "praxis" dans la philosophie grecque, d'Homère à Aristote." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM3135/document.

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Cette étude porte sur la notion de μέτρον dans l’antiquité grecque d’Homère à Aristote. Le μέτρον désigne la notion de mesure : il traverse à la fois l’histoire des idées et les différents domaines de la réflexion philosophique. Il est question de déterminer la signification et la fonction de la mesure dans la pensée philosophique. Dans un premier temps, l’étude entreprend la détermination de la notion éthique et pratique de la « juste mesure » dans la pensée archaïque, de la poésie archaïque (Homère, Hésiode) aux Sept sages et à la poésie élégiaque (Solon et Théognis). Ensuite, elle entrepren
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Forslind, Fanni. "The Effect of Immigration on Income Distribution : A Comparative Study of Ordinary Least Squares and Beta Regression." Thesis, Uppsala universitet, Statistiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-433098.

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The purpose of this study is to estimate the relationship between income inequality and immigration in Sweden. To do so, data from the data base Kolada with observations from all 290 municipalities in Sweden is used. As a proxy for income distribution the Gini coefficient is used and as a proxy for immigration the share of foreign born of working age is used. The model also controls for income tax, education level and unemployment level. The dependent variable the Gini coefficient is bounded by a unit interval and it is therefore not possible to simply run a linear regression. Such a model cou
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Bassu, Sébastien. ""Métron", entre "logos" et "praxis" dans la philosophie grecque, d'Homère à Aristote." Electronic Thesis or Diss., Aix-Marseille, 2013. http://www.theses.fr/2013AIXM3135.

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Cette étude porte sur la notion de μέτρον dans l’antiquité grecque d’Homère à Aristote. Le μέτρον désigne la notion de mesure : il traverse à la fois l’histoire des idées et les différents domaines de la réflexion philosophique. Il est question de déterminer la signification et la fonction de la mesure dans la pensée philosophique. Dans un premier temps, l’étude entreprend la détermination de la notion éthique et pratique de la « juste mesure » dans la pensée archaïque, de la poésie archaïque (Homère, Hésiode) aux Sept sages et à la poésie élégiaque (Solon et Théognis). Ensuite, elle entrepren
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Jeong, Yoonkyung. "The development of proportional reasoning : equivalence matching with continuous vs. discrete quantity /." 2003. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3108087.

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Lee, Bau-ding, and 李寶錠. "Economic Ordering Quantity Model for Items with Random Imperfect Quality Proportion and related Shortage Consideration." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/s44jwv.

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碩士<br>國立臺灣科技大學<br>工業管理系<br>95<br>Even there are many assumptions and restrictions contained in the traditional EOQ model to make this model simple, the EOQ model is still hard to apply to the real-life situations. For instance, EOQ model considers the receipt of goods with 100% quality guaranteed, but the products may be defected in the production or transportation. These defective products can be regarded as imperfect items; however, EOQ model neglects this practical assumption completely. Salameh and Jaber[19] added the assumption of items with imperfect quality to EOQ model and consider
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Books on the topic "Coefficient of quantity proportion"

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Belli, Silvio. On ratio and proportion: The common properties of quantity. Kim Williams Books, 2002.

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Consortium for Mathematics and Its Applications (U.S.), Chedd-Angier Production Company, American Statistical Association, and Annenberg Media, eds. Against all odds--inside statistics: Disc 3, programs 9-12. Annenberg Media, 2011.

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Renner, Tanya, Tianying Lan, Kimberly M. Farr, et al. Carnivorous plant genomes. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0011.

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Carnivorous plant genome research has focused on members of the Lamiales and Oxalidales; the most complete sequences are for Utricularia gibba and Cephalotus follicularis. The size-limited U. gibba genome highlights the importance of small-scale tandem duplications, which likely play roles in this species’ carnivorous adaptation. Sequencing of the C. follicularis genome detected adaptive changes that may explain the evolution of traits associated with attraction, trapping, digestion, and absorption. Functional consequences of genes putatively missing in the U. gibba genome, yet present in othe
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Kacorzyk, Piotr. Wartość gospodarcza okrywy roślinnej gleby w aspekcie nawożenia oraz zdolności retencyjnej płytki gleby górskiej. Publishing House of the University of Agriculture in Krakow, 2018. http://dx.doi.org/10.15576/978-83-66602-33-5.

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The aim of the study was to assess the impact of method management of mountain soil on the quantity and quality of waste water, and the amount of mineral nutrients it contains. I have analyzed the water, that was moved through the soil profiles of 0-20 cm and 0-40 cm depth. I have also evaluated the floristic composition, the productivity of grassland and arable land, and the use of fertilizers by vegetation and soil chemical properties. I have found that the type of plant cover of the soil had a significant effect on the amount and chemical composition of water moving through the soil profile
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Fuson, Karen C., Aki Murata, and Dor Abrahamson. Using Learning Path Research to Balance Mathematics Education. Edited by Roi Cohen Kadosh and Ann Dowker. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199642342.013.003.

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This chapter is an overview of central research-based perspectives that support teaching-learning for understanding and for fluency. We summarize the Class Learning Path Model that integrates two theoretical foci – a Piagetian focus on learning and a Vygotskiian focus on teaching – and specifies phases in learning that reflect Vygotsky’s assertion about the move from spontaneous to scientific concepts. Major aspects of the model were drawn from national research-based reports. This model connects understanding and fluency with a focus on mathematically important but also accessible methods in
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Skiba, Grzegorz. Fizjologiczne, żywieniowe i genetyczne uwarunkowania właściwości kości rosnących świń. The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 2020. http://dx.doi.org/10.22358/mono_gs_2020.

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Bones are multifunctional passive organs of movement that supports soft tissue and directly attached muscles. They also protect internal organs and are a reserve of calcium, phosphorus and magnesium. Each bone is covered with periosteum, and the adjacent bone surfaces are covered by articular cartilage. Histologically, the bone is an organ composed of many different tissues. The main component is bone tissue (cortical and spongy) composed of a set of bone cells and intercellular substance (mineral and organic), it also contains fat, hematopoietic (bone marrow) and cartilaginous tissue. Bones a
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Book chapters on the topic "Coefficient of quantity proportion"

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Fan, Xiaohui, Dao Su, Ganghua Fu, et al. "Influence of Limonite Proportion on Sinter Quantity and Quality." In 3rd International Symposium on High-Temperature Metallurgical Processing. John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118364987.ch38.

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Xia, Junwu, Chao Luo, and Enlai Xu. "The Mix Proportion Optimization Design of Coal Gangue Pervious Concrete." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-4090-1_34.

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AbstractIn order to improve the strength and permeability of coal gangue pervious concrete, an optimized mix design was conducted. An orthogonal experiment was employed to study the variations of compressive strength and permeability coefficient of coal gangue pervious concrete under the influence of aggregate particle size, water-cement ratio, designed porosity, and dosage of permeable admixture. After obtaining a relatively optimal mix proportion, further discussions were carried out by restricting the values of compressive strength and permeability coefficient to determine the appropriate r
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Xia, Junwu, Zhichun Zhu, Enlai Xu, and Linli Yu. "Study on Permeability Performance and Prediction Model of Coal Gangue Pervious Concrete." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-2417-8_30.

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AbstractTo expand the in-situ utilization of coal gangue in mining area and meet the demand of “sponge city”, the permeability coefficient, total porosity and effective porosity of coal gangue pervious concrete (CGPC) in different mixtures were deeply explored. The results show that the permeability coefficient of CGPC can reach 1.5 ~ 2 mm/s. In general, the permeability coefficient and porosity of CGPC increase as the aggregate particle size and designed porosity increase. Effective porosity is the key factor affecting the permeability coefficient of CGPC. More importantly, the prediction mod
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Chaisaard, Nattasit, Grit Ngowtanasuwan, and Satawat Dougpan. "The Optimal Proportion in Construction Quantity Analysis for Reinforced Concrete Structures of Detached Housing Projects." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4049-3_28.

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Zhao, Shaotang, and Sa Liu. "A Comparative Study on the Difficulty of the Exercises in the Textbooks of the Distributive Law of Multiplication." In Recent Advances in Mathematics Textbook Research and Development. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-8426-4_63.

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AbstractFour levels of the difficulty of the distributive law of multiplication are established (including the operational memory level, the conceptual memory level, the explanatory understanding level and the exploratory understanding level). Based on this, this paper makes a comparative analysis of the exercises of the distributive law of multiplication in the six editions of the textbooks. The conclusions are as follows: The total amount of exercises in different textbooks varies greatly, the amount and proportion of exercises at the same level vary greatly. And in light of that, it is nece
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Sedrique, Zoyem Tedonfack, and Julius Tata Nfor. "Rainfall Variability and Quantity of Water Supply in Bamenda I, Northwest Region of Cameroon." In African Handbook of Climate Change Adaptation. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_139.

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AbstractBamenda I municipality found in the humid tropic is endowed with a dense hydrological network which makes it a water catchment for the entire region. Paradoxically, the region still suffers problems of water shortage. This is due to the spatial and temporal variability in rainfall that greatly affects water supply through its impacts on surface and groundwater. For this reason, we came up with the research topic “Rainfall variability and quantity of water supply in Bamenda 1, Northwest Region of Cameroon.” The objective of this study is to examine the manifestations of rainfall variabi
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Salvadori, Justine, Rossella Varvara, and Richard Huyghe. "Chapter 4. Measuring affix rivalry as a gradient relationship." In Linguistik Aktuell/Linguistics Today. John Benjamins Publishing Company, 2024. http://dx.doi.org/10.1075/la.284.04sal.

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In many languages, affixes can be used to derive words with the same semantic types and can therefore compete in word formation. This paper discusses how to quantitatively assess the competition between derivational affixes based on their semantic similarity. Two possible measures of affix rivalry drawn from studies in ecology are examined: the Sørensen index, which considers the proportion of shared functions between rival affixes; and the Percentage similarity coefficient, which is based on the realization frequency of functions. Two complementary measures (Balanced richness and Balanced abu
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Li, Changhe. "Convective Heat Transfer Coefficient Model Under Nanofluid Minimum Quantity Lubrication Coupled with Cryogenic Air Grinding Ti-6Al-4V." In Thermodynamic Mechanism of MQL Grinding with Nano Bio-lubricant. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6265-5_9.

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Tatsuno, Takahiro, Hiromichi Waki, Waka Nagasawa, Naoto Nihei, Masashi Murakami, and Nobuhito Ohte. "Contribution of Cesium-Bearing Microparticles to Cesium in Soil and River Water of the Takase River Watershed and Their Effect on the Distribution Coefficient." In Agricultural Implications of Fukushima Nuclear Accident (IV). Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-9361-9_19.

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AbstractRadioactive cesium-bearing microparticles (CsMPs) are glassy particles containing large amounts of radioactive cesium (Cs, i.e., 134Cs and 137Cs). Because Cs in CsMPs is covered with insoluble glass, CsMPs may not release Cs into the liquid phase of river water. Previous studies have shown that CsMPs may drive overestimation of Cs transfer between the solid and liquid phases in rivers. In this study, we investigated the contribution of CsMPs to Cs concentrations in forest soil and river water in the Takase River watershed to explore the migration of CsMPs from a forest catchment and th
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Chorapalli, Jnanendra Vijay Kumar, and Soukat Kumar Das. "Sustainable Method for Determining Shear Strength Parameters by Machine Learning." In Lecture Notes in Civil Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-69626-8_120.

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AbstractThe conventional methods for determining the shear strength parameters of soil, namely cohesion (C) and angle of internal friction (φ), involve time-consuming and expensive machinery. Also, the extraction metal ore processing into metal and machine manufacturing involves a high level of carbon emission. During the operation of these machines a large quantity of electricity is generated in thermal power plants, leading to an indirect increase in the carbon footprint, thus suggesting a need for the adoption of more sustainable practices. This study is aimed at reducing net zero emission
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Conference papers on the topic "Coefficient of quantity proportion"

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Li, Yue, Yingpu Chen, Feng Xiong, and Haowei Lei. "Refined Analysis Method for Power Quantity Balance with High Proportion of New Energy." In 2024 5th International Symposium on New Energy and Electrical Technology (ISNEET). IEEE, 2024. https://doi.org/10.1109/isneet64164.2024.10956070.

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Liu, Jian, Chengfang Xiao, and Lingfei Duan. "Using Parameter Calibration and Influence Coefficient Method for Measuring Unbalance Quantity in Hard-Bearing Balancing Machine." In 2024 IEEE 4th International Conference on Information Technology, Big Data and Artificial Intelligence (ICIBA). IEEE, 2024. https://doi.org/10.1109/iciba62489.2024.10868368.

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Seen, Michael, Stefan Mardikus, and Kharisma Sugiana. "Numerical Study of Transient Temperature Distribution in Square Fins for Different Convective Heat Transfer Coefficients." In INTERNATIONAL CONFERENCE ON APPLIED TECHNOLOGY 2024. Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-nq305c.

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Substantial temperature disparities between machine components and their environment frequently impede the attainment of optimal system performance. To alleviate excessive thermal loads, the utilization of fins as cooling elements is a widely adopted approach. This research endeavors to numerically examine the temperature distribution within a square fin subject to varying convective coefficients. Numerical simulations employing the finite difference method were carried out to forecast the temperature distribution within the fin during the cooling process. The simulation outcomes reveal that t
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Shishkov, Toma, Emil Dimitrov, and Ekaterina Filchev. "FOREST SOILS FROM SREDNA GORA MOUNTAIN IN BULGARIA." In 24th SGEM International Multidisciplinary Scientific GeoConference 2024. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/3.1/s13.29.

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The soils from the central part of Sredna Gora Mountain in Bulgaria were studied aiming to establish the occurrence of contemporal soil forming processes occured in the forest ecosystem. Soils were analyzed to determine the carbon content, the soil organic matter composition and the total soil acidity. The precise soil classification based on the detail morphological diagnostic was carried out. The ecological conditions in forest ecosystem determine the mode of humic substances in the studies soils. Soils are characterized with low degree of humification and considerable amount of organic matt
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Dwyer-Joyce, R. S., T. Reddyhoff, and B. Drinkwater. "Ultrasonic Phase and Amplitude and the Measurement of Oil Film Thickness." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63789.

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The reflection of ultrasound at an oil film can be used to determine the film thickness. A thin oil film reflects less ultrasound than a thick film. When the film is thin there is a simple relationship between oil film thickness and the proportion of the wave amplitude reflected. The reflection coefficient is in fact a complex quantity with both magnitude and phase. A model for how both the phase and amplitude vary with oil film thickness (and the properties of the bearing materials) has been developed. It has been shown that both can be used to determine film thickness. Tests have been perfor
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Shi, Lifu, Jing Yao, Tian Yu, Yuanzhi Xu, and Xiaofei Wan. "Structure Matching Design of Lightweight CFRP/Metal-Lined Composite Hydraulic Cylinder." In BATH/ASME 2024 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/fpmc2024-141048.

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Abstract Hydraulic cylinder is the component with the largest proportion of the weight moving with the host equipment in the hydraulic system. Its lightweight design can help reduce the equipment’s weight and improve the load, endurance and maneuvering performance, which has become the design development direction of hydraulic cylinder at present. Carbon Fiber Reinforced Polymer (CFRP), as a new lightweight material, has the advantages of higher specific stiffness/strength, lower thermal expansion coefficient, better corrosion resistance and fatigue resistance compared with aluminum alloy and
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Slavinskas, Stasys, and Paulius Bendziunas. "Experimental study on influence of biofuels on injection characteristics of diesel engine common rail system." In 23rd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2024. http://dx.doi.org/10.22616/erdev.2024.23.tf067.

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The presented work focuses on experimental analyses of the influence of biofuels on the injection characteristics of a common rail injection system. Mineral diesel fuel, neat biodiesel fuel made from rapeseed oil and hydrotreated vegetable oil are addressed. Attention is focused on the injection characteristics which significantly influence the engine characteristics and subsequently the exhaust emissions. The injection rate, and the cycle injection quantity are studied across a range of injection pressures and injector energising duration. The fuel injection rates were measured and analysed u
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Yang, Jing, and Luis San Andrés. "An Analytical Two-Phase Flow Model for Prediction of Leakage in Wet Gas Labyrinth Seals and Pocket Damper Seals. Is Simplicity Still Desired?" In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58958.

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Abstract Current and upcoming two-phase pump and compression systems in subsea production facilities must demonstrate long-term operation and continuous availability. Annular pressure seals, limiting secondary flow, also influence the dynamic stability of turbomachinery. Hence, it becomes paramount to quantify the leakage and dynamic force coefficients of annular seals operating with two-phase flow, a liquid in gas mixture or wet gas. Until now, a simple model for labyrinth seals (LSs) and the more modern pocket damper seals (PDSs) is not available, though these seal types find wide applicatio
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Boas, Gustavo Sampaio Vilas, Isadora Abreu Oliveira, Beatriz Gusmão Oliveira, et al. "Relationship between the quantity of treatments and the incidence of spina bifida in Brazil." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.226.

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Background: Spina bifida is the second leading cause of motor disability in childhood. Therefore, it’s important to know if the therapeutic offer for spina bifida is fulfilling its demand. Objectives: To evaluate the relationship between the number of treatments and the incidence of spina bifida in Brazil, between 2016 and 2019. Design and Setting: Descriptive, retrospective study, with secondary data collected in the Hospital Information System of SUS (SIH / SUS) and the Information System of Live Births (SINASC), between 2016 and 2019, in Brazil. Methods: Variables used: frequency of spina b
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Wilkes, Colin. "Statistical Determination of Natural Gas Superheat Requirements." In 2002 International Joint Power Generation Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ijpgc2002-26036.

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The ASME Fuel Specification B133.7M [1] states that a typical margin of 25 to 30° C (45 to 54° F) of superheat is used for natural gas fuel but offers no basis for the estimate. The purpose of this paper is to propose a method for the safe determination of superheat that is less conservative, yet will meet the six sigma requirement of less than 4 defects (condensate formation) in one million opportunities. A drop in the total temperature of natural gas will be experienced as the gas expands in pressure reducing stations and across control valves. If the temperature falls below the hydrocarbon
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Reports on the topic "Coefficient of quantity proportion"

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Nored and James. PR-015-07603-R01 Effect of Orifice Plate Manufacturing Variations on Orifice Meter Performance - Blinded. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010636.

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An investigation to flow test and measure a large set of orifice plates to determine the proportion of existing orifice plates have measured discharge coefficients outside of the Reader-Harris/Gallagher equation 95% confidence limits. The research determined if the existing tolerance specifications adequately describe the dimensions of an orifice plate required to conform to the Reader-Harris/Gallagher equation calculated discharge coefficient. The testing also underscored the influence of manufacturing variations on orifice plate performance.
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Nored and James. PR-015-07603-R02 Effect of Orifice Plate Manufacturing Variations on Orifice Meter Performance - Unblinded. Pipeline Research Council International, Inc. (PRCI), 2013. http://dx.doi.org/10.55274/r0010829.

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An investigation to flow test and measure a large set of orifice plates to determine the proportion of existing orifice plates have measured discharge coefficients outside of the Reader-Harris/Gallagher equation 95% confidence limits. The research determined if the existing tolerance specifications adequately describe the dimensions of an orifice plate required to conform to the Reader-Harris/Gallagher equation calculated discharge coefficient. The testing also underscored the influence of manufacturing variations on orifice plate performance.
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3

Anchorena, José, and Lucas Ronconi. Entrepreneurship, Entrepreneurial Values, and Public Policy in Argentina. Inter-American Development Bank, 2012. http://dx.doi.org/10.18235/0011404.

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This paper uses datasets from six surveys to describe entrepreneurship in Argentina. While the quantity of entrepreneurship in Argentina is high, its quality is low, given the high proportion of informal and necessity entrepreneurs. Income is found to play a greater role in determining probability of becoming an entrepreneur than parental wealth; entrepreneurship is, however, transmitted inter- generationally. Although it is found that Argentina promotes entrepreneurial values more than most Latin American countries, entrepreneurs face several obstacles. Finally, using panel data based on hous
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De Bortoli, Lisa, and Catherine Underwood. PISA 2022. A closer look at mathematics in Australia. Australian Council for Educational Research, 2025. https://doi.org/10.37517/978-1-74286-786-1.

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The Programme for International Student Assessment (PISA) is an international comparative study that assesses how well 15-year-olds, who have nearly completed compulsory schooling in most participating educational systems, can use their knowledge and skills to meet real-world opportunities and challenges. In each cycle of PISA, students are assessed in the domains of reading, mathematics and science. Each cycle has a domain that is the major focus and for which there is a higher proportion of questions than from the others. Mathematics was the major focus in the 2022 cycle. The mathematics ass
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Goetsch, Arthur L., Yoav Aharoni, Arieh Brosh, et al. Energy Expenditure for Activity in Free Ranging Ruminants: A Nutritional Frontier. United States Department of Agriculture, 2009. http://dx.doi.org/10.32747/2009.7696529.bard.

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Heat production (HP) or energy expenditure for activity (EEa) is of fundamental nutritional importance for livestock because it determines the proportion of ingested nutrients available for productive functions. Previous estimates of EEa are unreliable and vary widely with different indirect methodologies. This leads to erroneous nutritional strategies, especially when intake on pasture does not meet nutritional requirements and supplementation is necessary for acceptable production. Therefore, the objective of this project was to measure EEa in different classes of livestock (beef cattle and
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Ocampo-Gaviria, José Antonio, Roberto Steiner Sampedro, Mauricio Villamizar Villegas, et al. Report of the Board of Directors to the Congress of Colombia - March 2023. Banco de la República de Colombia, 2023. http://dx.doi.org/10.32468/inf-jun-dir-con-rep-eng.03-2023.

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Banco de la República is celebrating its 100th anniversary in 2023. This is a very significant anniversary and one that provides an opportunity to highlight the contribution the Bank has made to the country’s development. Its track record as guarantor of monetary stability has established it as the one independent state institution that generates the greatest confidence among Colombians due to its transparency, management capabilities, and effective compliance with the central banking and cultural responsibilities entrusted to it by the Constitution and the Law. On a date as important as this,
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