research on the hysteretic behavior of high strength concrete filled steel tubular members under compression and bending
Fire resistance of ultra high strength concrete filled steel tubular columns
... the conventional concrete with more sustainable non -concrete alternatives such as steel, or to use higher strength concrete Regarding concrete, the production of ultra -high strength concrete (UHSC) ... because the concrete can absorb the heat from the steel tube whereas the steel tube can prevent the concrete from spalling Due to the retarded temperature elevation of the steel tube by infilled concrete, ... design, guidelines on high strength steel and concrete on CFST is not available The present research aims to extend the design codes by investigating the behaviors of these high strength materials...
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Báo cáo "On the asymptotic behavior of delay differential equations and its relationship with C0 - semigoup " potx
... First of all, we investigate an extention of the conditions for stable (see [12]) of solution of delay linear diffirential equation under nonlinear perturbation We recall that, the conditions (5), ... satisfies the hypothesis of theorem (2.3) then the solution of Eq.(12) in the case µ = is asymptotic equivalence to the solution of Eq.(12) in the case µ = Ackowledgments This paper is based on the ... given at the Conference on Mathematics, Mechanics, and Informatics, Hanoi, 7/10/2006, on the occasion of 50th Anniversary of Department of Mathematics, Mechanics and Informatics, Vietnam National...
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báo cáo hóa học:" The influence of a weight-bearing platform on the mechanical behavior of two Ilizarov ring fixators: tensioned wires vs. half-pins" pdf
... construction, the transfixion of soft tissue by the tensioned wires or the transfixion of the hindfoot within the frame Efforts have been made to simplify both the application and configuration ... to the anatomical conditions, and the tibiae were mounted eccentrically in the sagittal plane to mimic the soft tissues of the calf At the site of the osteotomy, the distance between the bone and ... wire on the top side and one on the bottom side of the ring They were attached to the ring with slotted bolts and tensioned to 1080 Nm with the standard tensioning device that is part of the Ilizarov...
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Báo cáo hóa học: " Effects of crystallization and dopant concentration on the emission behavior of TiO2: Eu nanophosphors" potx
... through the creation of dopant levels near the valence band of TiO2 on Fe+3 ion incorporation Therefore, the relative shift of the absorption edge of the semiconductor depends strongly on the difference ... with the increase of doping concentration The reason of such bandgap energy increment has been proposed as the gradual movement of the conduction band of TiO2 above the first excited state of Eu+3 ... between the ionic radius of the dopant and the host cations, as well as on the chemical nature of the dopants To evaluate the bandgap energy of the nanoparticles associated to their direct transition,...
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Báo cáo toán học: "On the Asymptotic Behavior of Solutions of a Nonlinear Difference Equation with Bounded Multiple Delay" pptx
... Dinh Cong Huong 164 is the oscillation of solutions of the difference equation xn+1 − xn + pn xn−m = 0, n∈N in [1]; the positive periodic solutions of nonlinear delay functional difference equations ... least one positive periodic solution Theorem If either (2.3) (2.4) On the Asymptotic Behavior of Solutions of a Nonlinear = and = ∞ and 169 =∞ (2.5) =0 (2.6) or then (2.1) has at least one positive ... solution of (2.1) and M = max−m j xj We prove that xn M for M for all k n Then by the all n Indeed using induction assume that xk difference equation (2.1) On the Asymptotic Behavior of Solutions of...
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Báo cáo toán học: "A Note on the Asymptotic Behavior of the Heights in b-Tries for b Large" ppt
... understood by viewing the problem as first fixing k and b, and then varying n (cf Section 4) Theorem For b → ∞ the distribution of the height of b-tries has the following asymptotic expansions: (a) b, k ... distribution Derivation of Results We establish the five parts of Theorem Since the analysis involves a routine use of the saddle point method (cf [1, 12]), we only give the main points of the calculations ... evaluate the first integral exactly and use Laplace’s method on the second integral Now f (u) < for u ≥ A/b and the major contribution to the second integral is from the lower endpoint Obtaining the...
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Experimental and numerical studies on the viscoelastic behavior of living cells
... investigate the Chapter Literature review 17 contribution of the cell membrane and spectrin network to the large deformation of red cells On the other hand, the continuum modeling approach treats the ... contribute to a more accurate evaluation of the viscoelastic properties of cells and better understanding of the biological response of cells to mechanical stimuli To fulfill the objectives, the ... static structure It undergoes constant remodeling and is capable of moving and contracting due to the action of motor proteins and the dynamic assembly and disassembly of the cytoskeletal polymers...
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RESEARCH ON THE GENETIC DIVERSITY OF SOME SOYBEAN VARIETIES THAT ARE RESISTANT TO RUST DISEASE IN DIFFERENT WAYS
... change as infection occurs The change of the content of these proteins is related to the disease process or other physiological responses of plants by the consequences of infection Chromatography ... basic components in the leaves, in which protein have photosynthetic function with the highest proportion of 29%, then the energy metabolism proteins of photosynthesis cycle (17%), and the proteins ... explore further research on the role and function of the protein changes of soybean varieties in order to understand the mechanism of infection, as well as rust leaf disease resistance of soybean...
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Báo cáo lâm nghiệp: "Interactive effects of irradiance and water availability on the photosynthetic performance of Picea sitchensis seedlings: implications for seedling establishment under different management practices" ppt
... CO2 concentrations, under both water limited and waterlogged conditions [9, 27] Photosynthesis would also be inhibited due to the increased participation of competing pathways and consumption of ... where Ci is the internal CO2 concentration, Γ * is the CO2 compensation point in the absence of mitochondrial respiration and Rd is mitochondrial respiration in the light The values for Γ * for Sitka ... (Fig 2) 3.4 The effect of water logging on photosynthesis and leaf conductance in exposed and shaded plants The reduction in Amax in exposed and shaded seedlings under waterlogged conditions was...
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guide to quality control and testing of high-strength concrete
... compressive -strength test results are more sensitive to testing conditions as the strength of the concrete increases The quality of high- strength concrete is controlled by the quality and uniformity of the ... because a higher degree of control is maintained in the production and testing of high- strength concrete Continual review of the field results and the maintenance of records in the form of control ... progression to the use of the higher -strength concrete This guide details those measures 1.2—Objectives The cement and concrete industry’s interest in highstrength concrete prompted the American Concrete...
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A study on the pragmatic features of collocation used in advertising hair care products in english and vietnamese
... intended features of these collocations - To collect and systematize some theoretical background for 1.7 the study of collocations Chapter consists of the rationale the justification the and pragmatic ... collocations will be a contribution to the that they are performing when they speak The big disadvantage is understanding and using collocation of the learners that all these very human concepts ... “hair”, “tóc” and their proper adjectives and the equivalents based on the findings Chapter is the conclusion of what has been found and - What are the similarities and differences of these discussed...
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Flexural strength ductility performance of flanged beam sections cast of high strength concrete (p 29 43)
... including the concrete grade, the tension and compression steel yield strengths and the tension and compression steel area ratios on the flexural ductility of rectangular beam sections have been ... smaller, the degree of the beam section being under- reinforced is higher and the degree of the beam section being over-reinforced is lower Therefore, at the same tension steel area, the degree of the ... heavier On the other hand, design options and require the use of a high- strength concrete but the resulting beam section would have a smaller sectional area and therefore would be lighter The choice...
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Research for Agricultural Sciences:" Effect of high temperature fluidized drying and tempering on head rice yield and mechanical strength of Vietnamese rice varieties " doc
... force of the rice kernel Colour determination The objective of the color measurement was to evaluate the effect of high temperature drying and tempering on the whiteness of the rice It was undertaken ... temperature and tempering duration as reflected by the lowest number of fissured kernel after the completion of drying followed by tempering To study the mechanical strength of the rice kernels under ... system that the head rice yield was also highly dependent on settings and length of operation of the rice mill We had to make many repetitions of experiments and readjustments to the milling...
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An action research on the use of continuous feedback to improve the first year students' pronunciation at the english department, college of foreign languages, vietnam national university, hanoi part 1
... minutes per week d There was no pronunciation lesson but the teacher taught the pronunciation of new words and corrected students’ pronunciation mistakes during the lesson (If yes, how long approximately? ... in the dictionary, what did you often do? a looked at its meaning only b looked at its pronunciation and meaning, then pronounced it in mind c looked at its pronunciation and meaning, then pronounced ... SATISFACTION Over the years, the development of different theories of management and different approached to organization has affected the way we view motivation In the 19th century, the writer...
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An action research on the use of continuous feedback to improve the first year students' pronunciation at the english department, college of foreign languages, vietnam national university, hanoi part 2
... classified in terms of: (1) The height of the bulk of the tongue in the mouth (2) The front/back position of the tongue in the mouth (3) The degree of lip-rounding (4) The length of vowels (Roach, ... reflection of what the researcher had found out about the pronunciation problems of the students The decision of focusing on the English consonant sounds that most of the students made to teach and ... due to the limitation of time, the researcher only focused on English consonant sounds - To justify the effect of continuous feedback on students’ pronunciation 1.4 Research questions With the above...
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RESEARCH ON THE CHANGE OF 2-AP AND OTHER VOLATILE COMPOUNDS IN PROCESSING BUN FROM RICE
... extraction of the 2-AP high concentration materials like Pandan leaf (Phan Phuoc Hien, 2011) Based on the two methods we studied for extraction and quantitative analysis of 2-AP in the pandan leaf and ... as internal standard Duration of extraction was 30 minutes from apparition of the first drop of water in the bottom of the condensed tube Volatile compound extracts were then concentrated to ... Ministry of Agriculture and Rural development (MARD) Vietnam Phan Phuoc Hien, Truong Thi Bich Lieu (2011) Research on the extraction and utilization of 2-AP from Pandanus’leaf as the standard for...
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AN ACTION RESEARCH ON THE EFFECTS OF PRE WRITING ACTIVITIES ON THE GRADE – 11 NON – MAJOR ENGLISH STUDENTS’ MOTIVATION IN WRIT
... Development and Conclusion Part 1: Introduction presents the rationale, the research questions, the method of study, the research procedure, the scope of the study, the significance of the study and the ... employs the following methods: Data is collected by means of three sets of questionnaires, one on the teachers and the others on the students in pre – improvement stage and post – improvement one The ... advice and suggestions on the research of how pre – writing activities affect to students’ writing performance and on the completion of my research I also owe my sincere thanks to all of the students...
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AN ACTION RESEARCH ON THE APPLICATION OF COOPERATIVE LEARNING TO TEACHING SPEAKING TO THE SECOND YEAR SUDENTS AT THE DEPARTMENT OF ENGLISH, GIA LAI TEACHERS' TRAINING COLLEGE
... test of the second semester The test keeps the same format and criteria as the previous tests they had in the two semesters of the first year and the first semester of the second year and most of ... into highly structured paragraphs Spoken language, on the other hand, consists of short, often fragmentary utterances, in a range of pronunciations There is often a great deal of repetition and ... to the study, the statement of the problem, the scope, objectives and research questions as well as the methods and design of the study Part B, including three chapters, reports on the main contents...
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