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Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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1

Шершенюк, Олена, та Микола Прокопенко. "ОСОБЛИВОСТІ ПРОВЕДЕННЯ ЕКОНОМІКО – МАТЕМАТИЧНОГО ДОСЛІДЖЕННЯ ПОТРЕБ СПОЖИВАЧІВ (ПОПИТ) ТА ЗБУТУ ТОВАРІВ (ПРОПОЗИЦІЯ) НА ПРИКЛАДІ РИНКУ ХАРЧОВОЇ ПРОДУКЦІЇ". Проблеми і перспективи розвитку підприємництва, № 27 (14 листопада 2021): 157. http://dx.doi.org/10.30977/ppb.2226-8820.2021.27.157.

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Анотація:
УДК 330.42; JEL Classification: D120 Мета дослідження полягає в розробці напрямів вдосконалення економічних досліджень споживчих запитів (потреб) в діяльності підприємства (фірми) за допомогою сучасних методів економіко - математичних досліджень економічних процесів, а також розробці елементів стратегії збуту продукції. Методика дослідження. Застосовані елементи експертного опитування, аналізу, економіко-математичне моделювання, регресійне моделювання, статистичні та економетричні методи аналізу: абсолютні, середні і відносні величини, індексні, трендові та регресійні факторні моделі, методи варіаційного, дисперсійного, кореляційного аналізу та графічна інтерпретація отриманих результатів. Результати дослідження. Пошук шляхів удосконалення збутової діяльності будь-якого підприємства в сучасних умовах слід розпочинати з визначення споживчих бажань і потреб. Перспективним напрямом удосконалення економічних досліджень споживчих бажань є грамотне управління дослідницькою діяльністю. Основні завдання і цілі — це збір і обробка економічної інформації з подальшою розробкою математичної моделі за допомогою сучасних математико-статистичних методів. Також обґрунтована можливість використання Microsoft Excel з метою рішення практичних завдань визначення параметрів ринкового попиту і пропозиції. Наукова новизна. Наукова новизна отриманих результатів полягає в рішенні ряду теоретичних і практичних проблем визначення чисельних параметрів попиту та пропозиції, розробці напрямів підвищення ефективності економічних досліджень за допомогою сучасних математичних методів. Запропонована методика розрахунку параметрів попиту і пропозиції з допомогою економіко — математичної моделі, реалізованої засобами Microsoft Excel. Практичне значення отриманих результатів. Запропоновані для впровадження результати дослідження можуть бути використані в дослідницькій діяльності будь-якого підприємства сфери виробництва і реалізації продуктів харчування. Практичним ефектом є розрахунок параметрів попиту і пропозиції залежно від споживчих потреб (параметрів товару).
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2

El Mahdy, Cristina Iuliana, Silvana Popescu, Anca Boaru, and Cristin Borda. "Assessing the Chemical Status of Water from Wells Which Supply Farms Located on Romania's territory. Part I." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies 73, no. 2 (November 28, 2016): 135. http://dx.doi.org/10.15835/buasvmcn-asb:12154.

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Анотація:
Aim of this study was to assess the chemical status of water by point of view of the indicators parameters coming from the decentralized system of water supply (wells) and which supply the water of dairy farms performed in 63 wells from the same number of farms from 5 located in: S-E, N-W and central of Romania at the request of farmers. It has been studied the parameters that indicate the status of water acidification: pH (SRISO 10523/97); indicator parameters having as landmark the minimum list of parameters monitored by the laboratories of profile from county public health department: hardness (STAS 3326/76), iron (STAS 3086/68), CCOMn (STAS:3002/85), ammonia (spectrometry), parameters indicative of saline inclusions: chlorides (STAS 3049/88), sulfates (SRISO 10523/97). Characterization of the chemical state of water: good or poor was done after the values that define the worst condition. The limit values for each parameter are compared to those required by the L.107/1996, L.458/2002, 311/2004, O.621/2012. Were recorded values which attesting good quality status for 21 wells:[ 1 Buzău (BZ),12 Cluj (CJ),2 Mureş (MS),6 Sălaj (SJ)] and 42 wells whose water quality status it is poor (6 AB, 5 BZ,17 CJ, 7 MS). Exceeding the limits values were found at the parameters: CCOMn (CJ: 05.29±3.87mgO2/dm3, 10.59±2.04 mgO2/dm3 AB); ammonia: (AB: 0.56±0.08 mg/dm3, MS: 0.51±0.1 mg/dm3), iron (BZ: 0.85±1.05 mg/dm3, CJ: 0.37±0.47 mg/dm3, MS: 0.62±0.57mg/dm3), chlorides (AB: 330.42±208.8 mg/dm3, MS: 243.18±164.8 mg/dm3). Contamination risk score of wells in the studied areas is medium (3 point).
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3

Gómez, María Paula MP, Melania M. Istrate, Patricia P. Peralta, Elisa E. Vera, Jordi J. Perales, Marti Manyalich, Marco M. Zanello, and Mirela M. Busic. "330.2." Transplantation 103 (November 2019): S70. http://dx.doi.org/10.1097/01.tp.0000611952.77640.c7.

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4

Manyalich, Marti, Chloe Balleste, Entela Kondo, Melania Istrate, Wenshi Jiang, Marco Zanello, Patrick Jambou, and Daniel Chevallier. "330.4." Transplantation 103 (November 2019): S71. http://dx.doi.org/10.1097/01.tp.0000611960.79425.d8.

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5

Swanson, LeAnn. "330.10." Transplantation 103 (November 2019): S75. http://dx.doi.org/10.1097/01.tp.0000611984.09921.e3.

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6

Larson, Susan, Kathy Selden, Katie McKee, and Jolynn Ryan. "330.1." Transplantation 103 (November 2019): S69—S70. http://dx.doi.org/10.1097/01.tp.0000611948.00511.02.

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7

Raghuram, Lalitha, Sunil Shroff, and Pallavi Kumar. "330.3." Transplantation 103 (November 2019): S70—S71. http://dx.doi.org/10.1097/01.tp.0000611956.85263.a4.

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8

Seth, Avnish, Jasrita Dhir, Arnab Acharya, Twinkle Singh, and Bhavdeep Singh. "330.5." Transplantation 103 (November 2019): S71—S72. http://dx.doi.org/10.1097/01.tp.0000611964.79425.cd.

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9

Daly, Theresa, Kathy P. Yandle, Robert Norden, Maria Bleil, Gweneth O’Shaughnessy, Richard D. Hasz, and Howard M. Nathan. "330.6." Transplantation 103 (November 2019): S72. http://dx.doi.org/10.1097/01.tp.0000611968.87049.15.

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10

Coll, Alba, Chloë Ballesté, Ricard Valero, David Paredes, Fritz Diekmann, Vicens Torregrosa, Aurora Navarro, et al. "330.7." Transplantation 103 (November 2019): S72—S73. http://dx.doi.org/10.1097/01.tp.0000611972.64178.e0.

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11

Langilao, Salimah, and Maria Theresa Lorenzo-Bad-Ang. "330.8." Transplantation 103 (November 2019): S73—S74. http://dx.doi.org/10.1097/01.tp.0000611976.71802.e4.

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12

Kanvinde, Hemal, Sunil Shroff, Ishwarya Thygarajan, and Sivashankar T S. "330.9." Transplantation 103 (November 2019): S74—S75. http://dx.doi.org/10.1097/01.tp.0000611980.09921.f6.

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13

Sandmann, Christian. "Graph Repair and its Application to Meta-Modeling." Electronic Proceedings in Theoretical Computer Science 330 (December 3, 2020): 13–34. http://dx.doi.org/10.4204/eptcs.330.2.

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14

Duval, Dominique, Rachid Echahed, and Frédéric Prost. "An Algebraic Graph Transformation Approach for RDF and SPARQL." Electronic Proceedings in Theoretical Computer Science 330 (December 3, 2020): 55–70. http://dx.doi.org/10.4204/eptcs.330.4.

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15

Jiang, Yun, Hua Dong Zhang, De Ben Hu, and Xiao Chun Fan. "Stress Analysis of Photo-Elastic Orthotropic Composite Material and Measurement Fringe Value of Shear Material." Applied Mechanics and Materials 330 (June 2013): 12–17. http://dx.doi.org/10.4028/www.scientific.net/amm.330.12.

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Анотація:
Based on the analysis characteristics of orthotropic composite material under antisymmetric force, a new measurement method is established which can independently measure the fringe value of optical shear orthotropic material by pure-shear experiment. Two orthotropic photo-elastic composite material beams with rectangular cross-section which fiber orientation is 0 °, 90 ° respectively are loaded anti-symmetric force, so that the anti-symmetric section is in a pure shear stress state. The fringe value of orthotropic photo-elastic shear composite material is measured . The results agree with three stripe specimens tensile experiment.
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16

LI, Yong Jia, Ting Lei, and Da Jin Yang. "Radionuclide of Process of Carbon Decomposition and Anneal of Liquor after Desilication from Nepheline." Applied Mechanics and Materials 330 (June 2013): 22–26. http://dx.doi.org/10.4028/www.scientific.net/amm.330.22.

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Анотація:
Carbon decomposition of liquor afger desilication from nephine was investigated, aluminium oxide was prepard by anneal of Al (OH)3 separated out from carbon decompositon, and analysis of radionuclide of both above process was performed. The results show decomposition rate of sodium aluminate can be obtained when experiments of carbon decomposition of liquor after desilication using CO2 of hight concentration, and it is beneifit for the crystal growth of Al (OH)3, filtration and separation. Great mass of nuclide exists in the mother solution of carbon decomposition, and few into Al (OH)3, which could be regarded as wiout radioactive contamination. .
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17

Huang, Hui, Ding Yue Chen, Guo Jun Mao, and Hui Chen. "Complete Equipment Inspection Method Based on Risk Assessment and Nondestructive Testing." Applied Mechanics and Materials 330 (June 2013): 242–49. http://dx.doi.org/10.4028/www.scientific.net/amm.330.242.

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Анотація:
Three propylene spherical tanks which have both the same manufacturing parameters and conditions have been assessed based on risk assessment and non-destructive testing technology. One of the spherical tanks is stopped for comprehensive inspection, and the result of inspection verifies the reliability of risk assessment, which is applied to other two unopened propylene spherical tanks. Meanwhile, in order to make overall inspection level meet the requirements of the risk assessment and so reduce spherical tanks assessing risk, ultrasonic diffraction detection (TOFD) with high detection rate and fluorescent magnetic surface detection technology are adopted to ensure comprehensive test meeting the risk assessment requirements, which can also provide significant guidance for future complete equipment inspection.
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18

Rezavand, S. A. M., S. Falah Kordi, and T. Azdast. "Experimental Study on the Effect of Adding Carbon Black Powder on Tensile Strength of LDPE Films under Artificial Weathering Condition." Applied Mechanics and Materials 330 (June 2013): 32–36. http://dx.doi.org/10.4028/www.scientific.net/amm.330.32.

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Анотація:
The properties of plastic parts that used for outdoor applications are changed under weathering conditions. Weathering involves considering the effects of solar radiation, temperature, humidity, pollutants. By adding some additives such as carbon black, TiO2, Hals and Tinuvin, the weathering effect could be decreased. In this study, LDPE films by adding different percentages (0.1, 0.5 and 1%) of carbon black (C.B.) with 0.2 mm thickness were produced by extrusion process. Samples were cut according to ASTM D882 and to accelerate the tests, samples located in accelerated artificial weathering device up to 1400 hour. The device was set at 40°C and humidity of 50%. Required samples for tensile strength test bring out of device at selected period and tensile strength was done by 350 mm/min strain rate. The results show that samples containing carbon black have tensile stress and elongationmore than the clear films. Carbon black absorbs UV light and heat that causing to delay in broken links and destroying the molecular. The optimum percent for tensile stress was 0.5 and for elongation was 1% C.B.
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19

Huang, Wen Zhu, Wen Tao Zhang, Huai Xiang Ma, Fang Li, and Yan Liang Du. "Distributed Feedback Fiber Laser Rosette for Acoustic Emission Detection." Applied Mechanics and Materials 330 (June 2013): 412–17. http://dx.doi.org/10.4028/www.scientific.net/amm.330.412.

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Анотація:
This study aims at providing a practical method in large structure health monitoring. A novel fiber optic rosette based on distributed feedback (DFB) fiber laser for acoustic emission (AE) detection and location is presented. The ultra-narrow line width of the DFB fiber laser will result in high resolution in AE wave detection using a fiber optic interferometric demodulation method. The directivity of the fiber optic rosette is investigated. A rosette with three DFB fiber lasers is tested in the experiment to determine the direction of propagation of AE waves.
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20

Liu, Cui Ling, Xiu Li Dong, Xiao Rong Sun, Jing Zhu Wu, and Sheng Nan Wu. "Experimentation of Detecting the Talc-Containing Wheat Flour in Solution by Near Infrared Spectroscopy." Applied Mechanics and Materials 330 (June 2013): 426–29. http://dx.doi.org/10.4028/www.scientific.net/amm.330.426.

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Анотація:
Do quantitative detection of talc-containing wheat flour using near infrared spectroscopy combined with BP neural network.Confect 50samples by adulterating talc to wheat flour,randomly selected nine samples as the prediction samples, formulated10 talc-free flour samples for qualitative analysis.The results show that:BP neural network combined with NIR for the determination of talc-containing flour is ideal, can be used for talc-containing flour; the result of cluster analysis should that it need to seek better methods for talc-containing wheat flour.
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21

Wang, Qing Mei, and Feng Yan Sun. "Research on the Influence of MPS to the Nuclei Population Density of Copper Electrocrystallization." Applied Mechanics and Materials 330 (June 2013): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amm.330.45.

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Анотація:
In this file, the influence of the concentration of additive MPS on the Nuclei Population Density of copper electrocrystallization on a glass carbon electrode (GCE) with different potentials has been studied. The exponential curve has been used to fit test data. From this function, the most nuclei population density of copper electrocrystallization can be estimated under certain experimental condition. From analysis results, we can see that with different potentials, the nuclei population density has different limitations. When the potential is about-0.8 Volt, the largest value of the limitation of the nuclei population density can be achieved.
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22

Li, Ying Na, Xiao Yong Cao, Tao Xie, Zhen Gang Zhao, Ya Ping Zhou, Chuan Li, Hao Liu, Jian Kun Su, Li Ming Li, and Zhi Lin Zhang. "Strain and Cracks of Tunnel Lining Surveyed by Fiber Bragg Grating Strain Sensors and Ultrasonic Tester." Applied Mechanics and Materials 330 (June 2013): 472–78. http://dx.doi.org/10.4028/www.scientific.net/amm.330.472.

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Анотація:
The cracks have emerged on the second lining of right tunnel for three months after tunneling in the Xin Chang Tunnel. The maximum crack depth is 264.0 mm which is explored by a RS-ST01C type ultrasonic tester. A fiber Bragg grating strain sensor is developed for measuring the surface strain of second lining. By converting the deflection of structure into the strain of displacement telescopic gauge, a fiber Bragg grating is mounted on two ends of gauge where suffers the strain, and as a result its Bragg wavelength will be shifted. The strain sensitivity and temperature sensitivity of the grating sensor are separately 0.677×10-6/ and 0.968×10-5 /°C. Grating sensors are installed on the corresponding linings according to the crack distribution. In an observation period of 51 days, the measurement results indicate that the lining cracks are derived from the tilted pressure of surrounding rock. After a backfill period of 29 days, the tunnel structures are gradually tending to be stability in the following operation period of 429 days.
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23

Saleh, Sama’ila. "Crumb Rubber (CR) as an Alternative Binder to Supplement Bitumen: Nigeria as a Case Study." Applied Mechanics and Materials 330 (June 2013): 49–52. http://dx.doi.org/10.4028/www.scientific.net/amm.330.49.

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Анотація:
This research investigated the suitability of Crumb Rubber (CR) as an alternative binder to supplement bitumen. The emerging trends in the world has challenged researchers to seek means of converting waste to wealth partly because of the environmental concerns they pose and partly because there is a general dearth of raw materials as the stock of the existing ones are fast depleting. In this research, the traditional Marshall Test method was arbitrary used to test 20%, 40%, and 60% CR proportions replacement of bitumen against the control (0% CR). The results were assessed based on the provisions of Asphalt Institute Marshall Criteria to determine the conformity with engineering properties-Stability, Flow, and Void analysis. The results indicated that 40% CR content resulting in Stability - 11.0KN, Flow - 4.3mm and VIM-14.45% trailed those with content 0% CR, but adequate in engineering properties to replace bitumen in asphalt mix. The results meet the criteria of medium class traffic specified by Asphalt Institute (1979).
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24

Qiu, Lei, Shen Fang Yuan, and Tian Xiang Huang. "A Time Reversal Imaging Method without Relying on Transfer Function for Impact and Damage Monitoring of Composite Structures." Applied Mechanics and Materials 330 (June 2013): 542–48. http://dx.doi.org/10.4028/www.scientific.net/amm.330.542.

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Анотація:
Composite structures adopted in aerospace structures have attracted much interest to structural health monitoring (SHM) for localization of impact and damage positions due to their poor impact resistance properties. Propagation mechanism and frequency dispersion characteristics of Lamb wave signals on composite structures are more complicated than that on simple aluminum plates. Recently, much attention has been paid to the research of time reversal focusing method because this method shows a promising advantage to give a focusing image of the structural damage, improve the signal-to-noise ratio and compensate the dispersion of Lamb wave signals. In this paper, aiming at developing a practical method for on-line localization of impact and damage on aircraft composite structures which can take advantage of time reversal focusing and does not rely on the transfer function, a new phase synthesis based time reversal focusing method is proposed. Impact and damage images are given out directly through time reversal focusing based on phase synthesis process of the signals. A SHM demonstration system is built on a composite panel of an aircraft wing box with many bolt holes and stiffeners using the phase synthesis based time reversal focusing method. The demonstration results show that this method can estimate the positions of impact and damage efficiently with a low sensitivity of velocity errors.
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25

Hussain, P., R. Bhagat, and R. Dashwood. "Precursor Preparation for Ti-Al-V-Y Alloy via FFC Cambridge Process." Applied Mechanics and Materials 330 (June 2013): 62–67. http://dx.doi.org/10.4028/www.scientific.net/amm.330.62.

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Анотація:
This paper presents the work done for the preparation of precursor for producing Ti-Al-V-Y alloy via FFC Cambridge process. The aim of the work is also to investigate the uniformity of the phases formed during the pre-processing of the precursor.The importance of the alloy for mechanical and medical applications is well known. Titanium oxide (TiO2), vanadium oxide (V2O5), aluminium oxide (Al2O3) and yttrium oxide (Y2O3) were selected as raw materials for precursor. The expected composition for the new alloy is Ti-6Al-4V-0.5Y. Water was used as a binder for the precursor. The materials were pre-mixed by ball milling for 24 hours and pressed using 13 mm die. The pressed mixtures were then sintered in the furnace at 900°C for 24 hours. The sintered samples were analysed using the optical microscope, electron micrograph with EDX and XRD. The result of the optical micrograph showed that the raw materials were uniformly mixed and well distributed with the presence of porosities. Electron micrograph further verified the morphology of the materials and the elements distribution in the precursor. The overlapping of yttrium and vanadium, Y(VO4) was observed and verified by XRD. The derived formulated precursor was then ready for further work of reduction to Ti-Al-V-Y alloy using FFC Cambridge process.
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26

Daneshmehr, Alireza, D. J. Inman, and A. Mohammadi Fakhar. "Free Vibration Analysis the Cracked FGM Beam under Bending-Torsion Loading, Using GDQ Method." Applied Mechanics and Materials 330 (June 2013): 942–47. http://dx.doi.org/10.4028/www.scientific.net/amm.330.942.

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Анотація:
This paper presents a theoretical investigation of free vibration analysis of a functionally graded beam (FGM) under the bending-torsion loading using a classical elasticity theory. The FG beam is assumed to have an open edge crack. It is assumed that the material properties of the simply-supported cracked beam, vary along the beam thickness following a polynomial distribution in the thickness direction. This analysis is based on the linear fracture mechanics. First of all, governing equations and boundary conditions of the FG beam are derived using Hamilton's principle. The governing equations are solved using generalized differential quadrature (GDQ) method. By applying GDQ method, the governing differential equations convert to a linear system of algebraic equations. Then solving the eigenvalue problem, natural frequencies of the FG beam can be found. The results indicate that natural frequencies in the presence of a crack are affected by the crack ratio and location.
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27

Vijayalakshmi, M., A. S. S. Sekar, M. Sivabharathy, and G. Ganesh Prabhu. "Utilization of Granite Powder Waste in Concrete Production." Defect and Diffusion Forum 330 (September 2012): 49–61. http://dx.doi.org/10.4028/www.scientific.net/ddf.330.49.

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Анотація:
The ornamental granite stone-processing industries of Tamilnadu state produce tons of fine powder wastes during sawing and polishing. It is a non-biodegradable waste that can be easily inhaled by human being and animals and is also harmful to the environment. The main objective of this study is to investigate experimentally the suitability of granite powder (GP) waste as a substitute material for fine/natural aggregate in concrete production. The physical and chemical characterization of the GP waste was also addressed. The experimental parameter was the percentage of granite powder substitution. The cubes and cylinders were prepared using 0%, 5%, 10%, 15%, 20% and 25% of fine/natural aggregate substituted by GP waste. To understand fully the influence of GP waste on the behavior of concrete, several tests such as density, slump cone, split tensile strength, flexural strength; ultra sonic pulse velocity (UPV) and compressive strength tests were performed. The Young’s modulus of elasticity of the concrete was also determined. The GP waste exhibited a very high specific surface value of about 340kg/m2 and chemical analysis results showed that the examined material contains about 77% of silica (SiO2). Experimental results revealed that the rough texture and high specific area of the GP waste significantly decreased the workability of the concrete especially for the substitution level of 20% and 25%. The obtained test results show that the substitution of GP waste up to 15% does not affect the mechanical and fresh concrete properties of the concrete and it was recommended that the replacement of natural sand by GP waste up to 15% of any formulation would be favorable for concrete making.
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28

Westerhausen, Matthias, Sabine Weinrich, and Holger Piotrowski. "Synthese und Struktur des Kalium-tetrakis(triisopropylsilylphosphanyl)indats / Synthesis and Structure o f Potassium Tetrakis(triisopropylsilylphosphanyl)indate." Zeitschrift für Naturforschung B 56, no. 7 (July 1, 2001): 576–80. http://dx.doi.org/10.1515/znb-2001-0703.

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The metalation of triisopropylsilylphosphane with potassium bis(trimethylsilyl)amide yields quantitatively colorless pyrophoric potassium triisopropylsilylphosphanide (1 ) which is insoluble in hydrocarbons. The reaction of 1 with indium(III)chloride in toluene gives potassium tetrakis(triisopropylsilylphosphanyl)indate (2) in a rather poor yield. In the solid state this compound shows the formation of a one-dimensional polymeric chain with the indium as well as the potassium atoms in a distorted tetrahedral environment. The mean In-P and K-P bond lengths are 257.0 and 330.4 pm, respectively.
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29

Courtehoute, Brian, and Detlef Plump. "A Fast Graph Program for Computing Minimum Spanning Trees." Electronic Proceedings in Theoretical Computer Science 330 (December 3, 2020): 163–80. http://dx.doi.org/10.4204/eptcs.330.10.

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30

Wulandari, Gia S., and Detlef Plump. "Verifying Graph Programs with First-Order Logic." Electronic Proceedings in Theoretical Computer Science 330 (December 3, 2020): 181–200. http://dx.doi.org/10.4204/eptcs.330.11.

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31

Hériard Dubreuil, Gilles. "Penser notre humanité comme un patrimoine." Projet 330, no. 5 (2012): 42. http://dx.doi.org/10.3917/pro.330.0042.

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32

Bluhm, Katharina. "Zur Genese des neuen russischen Konservatismus." Russland-Analysen, no. 330 (February 17, 2017): 2–7. http://dx.doi.org/10.31205/ra.330.01.

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33

Machut, Antoine. "La gangrène de l'emploi précaire." Alternatives Économiques N° 330, no. 12 (December 1, 2013): 42. http://dx.doi.org/10.3917/ae.330.0042.

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34

Wan, Zhen Ping, and Yao Chao Li. "Forming Process and Mechanism of Microcapillary Grooves of Miniature Cylindrical Heat Pipe." Advanced Materials Research 328-330 (September 2011): 22–26. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.22.

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Анотація:
Miniature heat pipe is one of promising means of removing high heat flux for electronics cooling in limited available space. How to produce narrow and deep microcapillary grooves is the critical issue in promoting performance of axially grooved miniature heat pipe. In this work, the microcapillary grooves for miniature cylindrical heat pipe was fabricated by using oil-filled high speed spinning method. The forming process of microcapillary grooves was investigated. The influence of technical parameters on characteristics of microcapillary grooves was analyzed and the optimal technical parameters were found out. The experimental results show that drawing speed ranging from 48cm/min to 64cm/min, spinning ball number of 4 and big distance between the end of multi-tooth mandrel and the center of spinning balls within 3.7 mm should be chosen to obtain narrow and deep microcapillary grooves. In addition, the forming mechanism was investigated by observing microstructure of cross-section of microcapillary grooved tubes.
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35

Jing, Tang, Daniel T. Chang, and Chang Hao Zhao. "The MOSFET Model with an Anti-Parallel Diode as a Power Switch." Advanced Materials Research 328-330 (September 2011): 32–35. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.32.

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In practice a MOSFET is anti-parallel with a diode. In the paper there is a method how to build its model. The model applies for the MOSFET works as a power switch. The model consists of two capacitors, a voltage-controlled switch and a diode. There is an example for the model building. The circuits including the model are simulated. The results prove that the electrical data of model equals basically its actual data. The model can help electrical engineers design circuits which uses MOSFET as a power switch. The model built only need the data of its manual. The merit is very suitable for electrical engineers.
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36

Wang, Shi Long, Heng Zhou, Jie Zhou, and Rui Tang. "Study on Single-Hoist Multi-Objective Optimization Rescheduling Problem." Advanced Materials Research 328-330 (September 2011): 41–47. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.41.

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Combining with the actual production case, a multi-objective optimization rescheduling problem about that multiple products with various manufacturing processes in auto-production line aiming at a single hoist production in sequence where a new product is inserted is studied. Mathematical model and algorithm with a new stochastic scheduling method are proposed in fully consideration of the equipment (tank) and constraint of manufacture process. The model and algorithm which have been used in auto-production line of a surface treatment over half a year can meet the practical production requirements.
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37

Ye, Zi Bo, Sheng Guan Qu, Guang Hong Wang, and Wei Xia. "Numerical Analysis on Surface Stress of Rectangle Piston Ring with Chromium Coating." Advanced Materials Research 328-330 (September 2011): 412–15. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.412.

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To investigate surface stress distribution of rectangle piston ring, method of increment loading based on energy variational principle is used to ascertain contact state and solve elastic contact problems by iteration. Calculation results show that the central section of the first sealing surface is subjected to lower stress while two sides higher stress. The theoretical analysis and experimental results indicate that appearance of stress peak on surface is related to movement direction of piston ring. Relatively critical wear regions of piston ring are consistent with finite element analysis results. Wear width of both sides is 0.2mm more or less. The section of maximal stress appears at position near ring groove of the first sealing area.
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38

Mao, Ping Huai, Bing Zhai, and Run Dong Chen. "The Green Design for the Moving Device of the Silt Coal Load Machine." Advanced Materials Research 328-330 (September 2011): 421–25. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.421.

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Nowadays environmental issues facing society is one of the three major problems, the deterioration of the environment for human survival and development is caused a serious threat. The design of moving part of the silt coal loader is confined to traditional design but seldom considering the environmental elements. Through the analysis of the silt coal loader walk part of traditional design pattern characteristics and existing problems, from the angle of impact on environment, puts forward the green design thought. Based on the green design thought, all of the part of the loader should be respectively designed detailed. The design includes material selection, recycling design, disassembling design, etc. The loader can realize the purpose of protecting the environment and saving resources by the green design, according to the requirement of sustainable development. The applications of green design improve the product quality and economize resources, and make products to green environmental requirements.
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39

Qi, Zhao Hui, Bao Hong Sun, and Ling Yan Xu. "Numerical Simulation of Heat Transfer and Fluid Flow in Glass Tank Furnace after Bubbling." Advanced Materials Research 328-330 (September 2011): 426–30. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.426.

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Numerical method to simulate the effect of air bubblers on glass melt flow and heat transfer in glass tank furnace is presented in this paper. The numerical simulation is preformed by using Gambit and Fluent software. Results of numerical simulation for glass melt flow and heat transfer with and without air bubbling technology are compared. The roles of stirring air bubblers installed in different locations played are discussed. The results show that mathematical model established in this paper can better simulate the glass melt circulation and heat transfer in glass tank furance, and air bubbler has a significant effect on glass melt circulation and heat transfer, and the best installation locations should be chosen by calculating in order to make full use of the air bubblers. Air bubbling technology will improve the quality of glass obviously if it is used properly. The results obtained can provide reference for engineering design of glass tank furnaces.
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40

Wang, Chao, Jia Dong Li, Guo Yuan, Zhao Dong Wang, and Guo Dong Wang. "Prediction of Microstructure and Mechanical Properties of Plate in Roller Quenching." Advanced Materials Research 328-330 (September 2011): 462–65. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.462.

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Finite difference equations are used for simulation of plate temperature field in roller quenching, and cooling rate in thickness direction is calculated in this paper. Based on improved Maynier model of steel chemical composition and cooling rate, the microstructure constituents and hardness of 30mm thickness pressure vessel steel 07MnNiMoVDR are predicted and calculated with interpolation method. The experimental verification indicates that the simulation results agree well with the experimental ones.
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41

Huang, Tao, Li Jun Xin, and Zhi Yong Wang. "Study on Fiber Laser Welding for DP780 High Strength Steel." Advanced Materials Research 328-330 (September 2011): 48–53. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.48.

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Welding experiments of DP780 high strength steel plate produced by Baosteel with IPG YLR-6000-ST2 fiber laser have been processed. The influence of welding parameters on welding quality has been investigated. As well as microstructure and mechanical character of welding seam have been analyzed. The results show that the joint appearance of DP780 high strength steel welded with IPG YLR-6000-ST2 fiber laser has good performance and the mechanics property is good without fit-up gap. The microstructure of weld bead is columnar crystals, mainly lath-shaped ferrite, needle-like lower bainite and a small amount of martensite. Heat-affected zone is narrow and the grain grows with little size. The measured micro-hardness values of the sample decrease smoothly from weld center to base metal and there does not have softened zone.
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42

Asifa, Khurram, Hong Li, Li Li, and Shehzad Khurram. "Parametric Study of Welding Temperature Distribution in T-Joint Fillet Weld Using FEM." Advanced Materials Research 328-330 (September 2011): 492–96. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.492.

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This paper presents FE simulation of Arc welding process using nonlinear transient thermal analysis to study the effect of process parameters on temperature distributions in T-joint fillet welds. An APDL (ANSYS Parametric Design Language) program is developed to define moving surface heat source model with Gaussian distribution into simulations by using commercially available FE code ANSYS. The transient temperature distribution in fillet weld during welding process are predicted and subsequently validated with published experimental results. Influence of heat energy input, electrode angle, welding speed and plate thickness on temperature distribution was further explored. The present work provides a basis for prediction of welding residual stresses and distortions in fillet joints.
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43

Li, Chang Zheng, and Yong Lei. "A Computer Aided Testing System for an Aero Turbo-Shaft Engine." Advanced Materials Research 328-330 (September 2011): 542–46. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.542.

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Engine running plays very important roles in a turbo-shaft engine production and maintenance. Traditional computer aided testing is just work as a data acquisition system to measure parameters and control some devices. In this paper, a CAT system is realized based on VXI and virtual instrument technology, which also communicate with the PLC, the ECU and the dynamometer, to provide a centralized information system for a turbo-shaft engine running. Multi-functions are realized to assistant users before, during and after experiments.
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44

Wang, Hu, and Shu Yu Lv. "Research on the Modeling and Simulation of Vehicle R&D Process Based on Petri Net." Advanced Materials Research 328-330 (September 2011): 642–47. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.642.

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Анотація:
To quantitatively analyze the design process of vehicle R&D, and provide the basis for process optimization of research and development design, thus shortening the development cycle of new cars and enhancing the competitiveness of car business. Firstly this paper analyzes the core business of vehicle R&D design, and then apply the theory of Petri nets to build Petri model of vehicle R&D design process, finally apply simulation software to simulate the Petri model, and analyze the key constraints point of the R&D design process, point out the improvement direction of vehicle R&D process.
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45

Umeda, T. "Recent Continuous Casting Technologies of Steel in Japan." Materials Science Forum 329-330 (January 2000): 423–34. http://dx.doi.org/10.4028/www.scientific.net/msf.329-330.423.

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46

Nielsen, Ø., Lars Arnberg, Asbjørn Mo, and H. J. Thevik. "Determination of Mushy Zone Permeability in Equiaxed Al-Cu Alloys." Materials Science Forum 329-330 (January 2000): 43–48. http://dx.doi.org/10.4028/www.scientific.net/msf.329-330.43.

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47

Kuti, I., and András Roósz. "Modelling of Microsegregation of Binary Solid Solutions." Materials Science Forum 329-330 (January 2000): 49–56. http://dx.doi.org/10.4028/www.scientific.net/msf.329-330.49.

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48

Ariyajinno, Nattawut, and Sakdipown Thiansem. "The Optimal Ratio of Mixed Talc Silica and Narathiwat Clay for Cordierite-Mullite Refractories." Key Engineering Materials 766 (April 2018): 223–27. http://dx.doi.org/10.4028/www.scientific.net/kem.766.223.

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In this paper, effects of incorporation of Narathiwat clay (NT), talc and silica on the mechanical properties of cordierite-mullite refractories were investigated. The starting raw materials were mixed in different ratios and fired at 1300 °C for 2 hours. XRD patterns of fired refectories indicated cordierite and mullite phases. The fired samples were studied the firing shrinkage, water absorption, bulk density, apparent porosity and bending strength of the cordierite-mullite refractories. The optimum condition was achieved for the composition of 20% Talc that had shrinkage: 11.78%, water absorption: 4.16%, bulk density: 2.28 g/cm3, apparent porosity: 9.2% and bending strength: 330.82 kg/cm2. The results thus showed that Narathiwat clay, talc and silica was a potential materials for use kiln furniture cordierite-mullite refractories.
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49

Hasan, Monirul, Sujan Kumar Das, Jahid M. M. Islam, Md Abdul Gafur, Enamul Hoque, and Mubarak A. Khan. "Thermal Properties of Carbon Nanotube (CNT) Reinforced Polyvinyl Alcohol (PVA) Composites." International Letters of Chemistry, Physics and Astronomy 17 (September 2013): 59–66. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.17.59.

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Homogeneous Polyvinyl alcohol (PVA)/Carbon nanotube (CNT) composite has been prepared by solution casting method using gum acacia as a surfactant. CNT content in the composite was varied from 5-10% by weight. The thermal properties of PVA/CNT composites were investigated by Thermo Gravimetric/Differential Thermal Analyzer (TG/DTA) and Thermo Mechanical Analyzer (TMA). TG/DTA results showed that higher thermal stability in higher percentage of CNT in the composites. The 10% CNT containing PVA composite exhibit highest onset of melting, glass transition point and offset of melting temperature and the recoded values are 330.4K, 379K and 421.3K respectively. All of the result indicates that the developed PVA/CNT composite might be promising for use in solar cell application
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50

Parihar, D. S., and J. S. Rawat. "SPATIO-TEMPORAL CHANGE IN SNOW COVER AREA USING RS & GIS IN THE GORI GANGA WATERSHED, KUMAUN HIGHER HIMALAYA." International Journal of Advanced Research 9, no. 03 (March 31, 2021): 30–34. http://dx.doi.org/10.21474/ijar01/12550.

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Present research paper is an attempt to examine the dynamics of snow cover by using Normalized Difference Snow Index (NDSI) in Gori Ganga watershed, Kumaun Himalaya, Uttarakhand (India). For the study of snow cover of Landsat satellite imageries of three different time periods like Landsat TM of 1990, Landsat TM of 1999 and Landsat TM 2016 were used. Geographical distribution of snow cover reveals that in 1990 about 30.97% (678.87 km2), in 1999 about 25.77% (564.92 km2) area of the Gori Ganga watershed was under snow cover while in 2016 the snow cover was found only 15.08% (330.44 km2). These data suggest that due to global warming about 348.43 km2 snow cover of Gori Ganga watershed has been converted into non-snow cover area at an average rate 13.40 km2/year during the last 26 years.
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