cooling—multistep early and slow cooling with small temperature differences—numerical analysis 82 83
Thermal stresses and temperature control of mass concrete
... the adiabatic temperature rise will increase slowly, and there is enough time for the natural cooling and pipe cooling to reduce the maximum temperature of concrete The maximum temperature rise ... reduced to about 1.0 m Cooling of water pipe with small spacing can greatly reduce the temperature rise caused by the heat of hydration The combination of pipe cooling and precooling of the concrete ... height of cooling area with closely arranged cooling pipes is only 0.1À0.2 the length of the pouring block The range of cooling area with closely arranged cooling pipes is not large, and the cost...
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compaction of roller-compacted concrete
... occur should be removed and the particles redistributed by hand if necessary 5.3—Placement and compaction in dams and related work The transport and placement of RCC in dams and related work should ... drum rollers; and hand-held power tampers Larger equipment is used in open areas for high production where maneuverability is not a concern Smaller-size vibratory rollers and hand-held equipment ... from 20 to 10 s compared with mixtures without the admixture This improved the workability of the mixture and the ease with which the RCC could be consolidated (Hopman and Chambers 1988) Air-entraining...
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report on roller-compacted concrete pavements
... subgrade and base course(s); batching, mixing, and transportation; placing, compaction, and joint construction; and curing and protection 7.2—Subgrade and base course preparation The subgrade and ... fresh and cold joints, sawed joints, and cracks; 2) weathering and raveling; 3) joint sealant damage; 4) patching and utility cuts;* and 5) shattered area Three severity levels — low, medium, and ... dosage rates, and aggregate gradings Air-entrained RCC mix- tures were also placed and compacted in small test sections at WES, and a small section of air-entrained RCC was placed and compacted...
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Design appraisal of steel concrete composite joints
... model the joint for frame global analysis and design The joint modelling with and without joint transformation are demonstrated for specimens tested The conclusions and recommendations for future ... as proposed by Leon and Zandonini (1992) and this worked out to be 1.5m The slab reinforcement ratios for Specimens SCCB1, SCCB2, and SCCB3 were 0.5% (small) , 1.12%(medium) and 1.56%(large) respectively ... redistribution, without the beam flange and web becoming unstable On the other hand, the lack of fit between the column face and beam bottom flange will reduce the connection stiffness and increase...
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CFD for hydrodynamic efficiency and design optimization of key elements of SHP
... the operation and performance of turbines, and can cause dangerous hydropneumatic effects, such as noise and vibrations 1.4 Draft tube and tailrace Another challenge is to understand the hydrodynamic ... intakes, draftubes and tailraces and turbine operation [8, 9] To avoid separated flow zones, with non uniform velocity distribution and to minimize head losses, changes on inlet and outlet walls ... contracting and gives rise to new flow separation and thus to energy losses The formed vortices, which detach and disintegrate towards downstream, cause valve and pipe vibrations and give rise...
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Air port planning design & development of 21st
... demand They reflect the different sectors of air transport demand represented in the respective demand models Causal variables typically used for demand forecasts, their influence on demand, and ... correlation analysis, factor analysis, and linear and nonlinear regression analysis to define suitable predictive variables selected as the independent variables of the model Future demand levels ... air travel and the air transport industry The widespread usage of the Internet has also permitted the rapid and broad publication of standards and recommended practices by the FAA and other regulatory...
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Tài liệu DESIGN creation of artifacts in society ppt
... Milgrom, Paul and John Roberts 1986 “Price and Advertising Signals of Product Quality.”Journal of Political Economy 94: 796 821 Mithen, Steven, “Handaxes: The First Aesthetic Artefacts,” in Voland, Eckart ... is absolute and universal or dependent on context Although the philosophy and psychology of aesthetic judgments is more nuanced today, this basic tension between universal standards and relative ... symmetry attractive in potential mates And in fact, even today, facial symmetry is correlated with reproductive health, and so it is plausible that rapidly detecting and being attracted to facial symmetry...
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GUIDELINE OF THE EUROPEAN CENTRAL BANK pdf
... accounted for and presented in accordance with their substance and economic reality and not merely with their legal form; (b) prudence: the valuation of assets and liabilities and income recognition ... Financial Reporting Standards and related interpretations (SIC-IFRIC interpretations), subsequent amendments to those standards and related interpretations, future standards and related interpretations ... Nominal value Mandatory (a) Nominal value Mandatory The ECB capital share of each NCB in accordance with the Treaty and the respective capital key and contributions in accordance with Article 48.2...
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introduction to the design & analysis of algorithms
... decrease -and- conquer and divide -and- conquer There are several advantages in introducing decrease -and- conquer before divide -and- conquer: Decrease -and- conquer is a simpler strategy than divide -and- conquer ... Fundamentals of the Analysis of Algorithm Efficiency 41 Brute Force and Exhaustive Search 97 Decrease -and- Conquer 131 Divide -and- Conquer 169 Transform -and- Conquer 201 Space and Time Trade-Offs ... recognizes three variations of decreaseand-conquer and three variations of transform -and- conquer It is better aligned with analytical methods for the efficiency analysis (see Appendix B) Design techniques...
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Source: MACHINE DESIGN DATABOOKCHAPTER1PROPERTIES OF ENGINEERING MATERIALSSYMBOLS5;6a Aj Af pot
... or oil Oil Oil K Quenching 823 –923 803–1033 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 823 –933 or 423–473 (depending ... Condition H and T R, Q and S.R R, Q and S.R R, Q and S.R H and T 20 C 15 30 C 15 15 16 20 21 R, Q and S.R R, Q and S.R R, Q and S.R R, Q and S.R R, Q and S.R R, Q and S.R H and T H and T H and T H and ... Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast Chill-cast Sand-cast...
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Mechanism Design Enumeration of Kinematic Structures According to Function pdf
... Dr Freudenstein and his former students’ research results Others are taken from the author’s research in collaboration with professional colleagues, Ting Liu and Roland Maki, and with his former ... component, and tree 2.1.2 Walks and Circuits A sequence of alternating vertices and edges, beginning and ending with a vertex, is call a walk A walk is called a trail if all the edges are distinct and ... and A3 = 7 7 7 6 7 (2.16) Hence, the number of paths of length are: between vertices and 2, between vertices and 3, between vertices and 4, between vertices and 5, and...
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Mechanism Design - Enumeration of Kinematic Structures According to Function P1 pptx
... kinematics known as kinematic analysis and kinematic synthesis Kinematic analysis is the study of relative motions associated with the links of a mechanism or machine and is a critical step toward ... Series B, 89, 153–158 [11] Erdman, A.G and Sandor, G.N., 1991, Mechanism Design: Analysis and Synthesis, Prentice Hall, Upper Saddle River, NJ [12] Freudenstein, F and Dobrjanskyj, L., 1965, On a Theory ... Freudenstein, F and Maki, E.R., 1979, Creation of Mechanisms According to Kinematic Structure and Function, Journal of Environmental and Planning B, 6, 375–391 [14] Freudenstein, F and Maki, E.R., 1 983, ...
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Mechanism Design - Enumeration of Kinematic Structures According to Function P5 pot
... have v c = − = vertices and ec = − = edges There are two contracted graphs with vertices and edges as shown in Figure 5.3 With n2 = 2, ec = 6, and q = 2, Equations (4.19) and (4.20) reduce to b1 ... have v c = − = vertices and ec = − = edges There is only one contracted graph with vertices and edges as shown in Figure 5.2 With n2 = 3, ec = 5, and q = 2, Equations (4.19) and (4.20) reduce to ... vertices and ec = − = edges There is only one contracted graph with vertices and edges as shown in Figure 5.1 © 2001 by CRC Press LLC With n2 = 4, ec = 4, and q = 2, Equations (4.19) and (4.20)...
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Mechanism Design - Enumeration of Kinematic Structures According to Function P6 docx
... (G), and cam pair (Cp ) The pin-in-slot joint can be replaced by prismatic and revolute joints with an intermediate link Both revolute and prismatic joints are one-dof joints, while gear and cam ... obtained [8] Six-Bar Linkages For F = and L = 2, Equations (6.3) and (6.4) yield n = and j = Hence, planar one-dof linkages with two independent loops contain six links and seven joints An examination ... chain with five revolute and two prismatic joints © 2001 by CRC Press LLC FIGURE 6.6 Variable-valve-timing mechanism Eight-Bar Linkages For F = and L = 3, Equations (6.3) and (6.4) reduce to n = and...
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Chapter 8: Advanced Design Techniques and Recent Design Examples of CMOS OP AMPs doc
... ≈ VGSMX7 and VGSMX4 ≈ VGSMX8 ⇒ The current in MB1 and MB4 controls that in MX1 and MX4 and MX7 and MX8 * RBIAS controls the current through MB2 and MB3 ⇒ i.e the current through MX2 and MX3 Characteristics: ... I DM ↑ and I DM ↑⇒ I DM 11 ↑ and I DM12 ↑⇒ VGSM A ↑ VinA + ↓ and ⇒ Vout ↑, i.e VinA1 + ↑⇒ Vout ↓⇒ VinA1 − ↓ (virtual short between + and -) ⇒ VinA − ↓ througt M ⇒ All the bias voltage and current ... pole P2 and P3 becomes the second pole The stability considerations, P3 ≥ Ado P1 or Cc ≥ g m1 c 1c L gm allows a smaller gm2 and larger C L * RdsA ≈ Rc indep of temperature, process , and supply...
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Executive summary PHD thesis in history the policy and guideline of the communist party of vietnam on education and training cooperation with ASEAN countries from 1995 to 2010
... Vietnam and Thailand, the memorandum of understanding on educational cooperation between 23 Vietnam and Thailand was signed on Feb 20th, 2004 Though educational cooperation with Vietnam and Thailand ... Cooperation with Thailand Cooperation on education and training between Vietnam and Thailand are accelerated since 1990 Thailand supports Vietnam mostly in the area of rural and agriculture ... cooperation and experiencesharing with regional countries on education and training Along with the international economic integration process and the accession to the AFTA and the WTO, regional and international...
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Mechanism Design - Enumeration of Kinema Episode 2 Part 8 docx
... Dr Freudenstein and his former students’ research results Others are taken from the author’s research in collaboration with professional colleagues, Ting Liu and Roland Maki, and with his former ... published one book on robot analysis (Robot Analysis: The Mechanics of Serial and Parallel Manipulators, John Wiley & Sons, New York, 1999) and more than 100 journal and © 2001 by CRC Press LLC ... 2.1.2 Walks and Circuits 2.1.3 Connected Graphs, Subgraphs, and Components 2.1.4 Articulation Points, Bridges, and Blocks 2.1.5 Parallel Edges, Slings, and Multigraphs 2.1.6 Directed Graph and Rooted...
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Mechanism Design - Enumeration of Kinema Episode 2 Part 7 pps
... LLC is a single-link and the other is a two-link chain These two limbs, together with the end-effector and the base link, form a planar five-bar linkage A simple combinatorial analysis yields the ... PSS, and SPS are also feasible limb configurations Furthermore, if a cylindric joint is allowed, then UCU and SCS limbs with the cylindric joint axes passing through the centers of the universal and ... mechanism with four joint axes, where rotations of the end-effector about the third and fourth joint axes are coupled by a gear pair attached to links and FIGURE 9.21 A three-dof wrist with four...
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Mechanism Design - Enumeration of Kinema Episode 2 Part 6 doc
... labeled symmetrically with respect to the fixed link as X and Y for the five-link chain, and X, Y , and Z for the seven-link chain Let the degrees of freedom associated with the X, Y , and Z joints be ... dimensional synthesis and design optimization are needed The selection of a promising candidate for detailed analysis and synthesis is dependent on the designer’s experience and creativity We now ... edges e1 , e2 , e5 , and e7 ; circuit consists of edges e2 , e3 , e6 , and e8 ; circuit consists of edges e2 , e4 , e6 , and e9 ; and circuit consists of edges e1 , e4 , e5 , and e10 8.5.4 Detection...
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Mechanism Design - Enumeration of Kinema Episode 2 Part 5 pps
... pair of gears (2 and 3) with their axes of rotation passing through the two center lines “a” and “b;” for the 3–1–4– fundamental circuit, we draw a second pair of gears (3 and 4) with their rotation ... through the center lines “b” and “a;” and for the 4–1–5–4 fundamental circuit, we sketch a third pair of gears (4 and 5) with their axes passing through the center lines “a” and “c,” respectively We ... represents the genetic graph shown in Figure 7.10a, and the elements with a pound sign in the fourth row and fourth column are to be filled with a “1” and a “g.” Using this methodology, the first three...
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