longitudinal and torsional vibration of uniform beams
Tài liệu BALL SCREW DRIVE SYSTEMS: EVALUATION OF AXIAL AND TORSIONAL DEFORMATIONS docx
Ngày tải lên :
13/12/2013, 01:16
... RFERENCES Erkorkmaz, K and Kamalazadeh, A., High Bandwidth Control of Ball Screw Drives, Annals of the CIRP vol 55/1, 2006 Ginsberg, J H., Mechanical and Structural Vibrations Theory and Applications, ... Wide bandwidth control of high-speed milling machine of feed drives, PhD dissertation, University of Florida, 1999 Varanasi, K K and Nayfeh, S A, Modeling, Identification, and Control of Ballscrew ... coefficients of these elements All the above equations depend on the displacement fields u(x,t) and θ(x,t) that must be formulated A rigorous treatment of vibrations of continua requires the solution of...
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Báo cáo " Calculation of dispersion relation and real atomic vibration of fcc crystals containing dopant atom using effective potential " pot
Ngày tải lên :
14/03/2014, 13:20
... ) Here the vibrations of dopants Ni and Al are localized at l = 0, and the mass of dopant atom Al is smaller than the one of Cu, then the amplitude changes of the atomic vibration of Cu are smaller ... by Ni Fig 2a shows the calculated atomic vibration u2 (l = 2) of Cu and its phase shift for Cu doped by Ni or by Al atom The vibrations of dopants Ni and Al are localized at q = Here we consider ... ωmax ), and the mass difference between Al and Cu is larger than the one between Ni and Cu, then their phase shift is larger Fig 2b shows the calculated amplitude changes of vibration of Cu atoms...
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Báo cáo khoa học: "Viterbi Training for PCFGs: Hardness Results and Competitiveness of Uniform Initialization" doc
Ngày tải lên :
17/03/2014, 00:20
... of the rules VYr → y and VYr → 1−y ¯ to and VYr → y and VYr → − y to The rest ¯ of the weights for Sφj → Sφj−1 Aj are set to This assignment of rule probabilities results in a Viterbi parse of ... Casacuberta and de la Higuera, 2000; Lyngsø and Pederson, 2002; Udupa and Maji, 2006; McDonald and Satta, 2007; DeNero and Klein, 2008, inter alia) Of special relevance to this paper is Abe and Warmuth ... appearance of both rules of the form VYr → and VYr → cannot occur because all rules that appear in the Viterbi parse tree have probability For any r, an appearance of rules of the form VYr → and VYr...
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synthesis, growth mechanism and room-temperature blue luminescence emission of uniform wo3 nanosheets with w as starting material
Ngày tải lên :
20/03/2014, 13:08
... with the XRD result Fig 2a and b shows the FESEM image and TEM image of the as-synthesized WO3 nanosheets Uniform WO3 nanosheets with a thickness of $80 nm and length of $500 nm can be observed ... oxidation of W using hydrogen peroxide (H2O2) [35,36] In a typical synthesis, 6.5 g of W powder was dissolved into a mixed solution of 40.0 mL of H2O2 and 4.0 mL of H2O with an ice-water bath and stirring ... spaces are 0.385 and 0.376 nm in the 2D plane of a single nanosheet, which correspond to the plane distances of (0 2) and (0 0) planes, respectively And the angle between the (0 2) and (0 0) plane...
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Determinants of General Health Status and Specific Diseases of Elderly Women and Men: A Longitudinal Analysis for Western and Eastern Germany doc
Ngày tải lên :
22/03/2014, 13:20
... urgency; abruptness of gesture and speech; overcommitment to vocation or profession; and excesses of drive and hostility” and is known to be closely related to heart diseases We measured and classified ... presence of hypertension and that of diseases of the digestive system were associated with higher odds of suffering diseases of the circulatory system An increased likelihood of having diseases of ... presence of other diseases of the circulatory system, diseases of the musculoskeletal system and connective tissue and the presence of diseases of the genitourinary system Further, the presence of...
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báo cáo sinh học:" Profile and professional expectations of medical students in Mozambique: a longitudinal study" doc
Ngày tải lên :
18/06/2014, 17:20
... Academic Performance as predictor of Performance in the Medical School: A case study at the College of Medicine of the University of Lagos Nigerian Journal of Health and Biomedical sciences 2002, ... attitude and predictor of performance in Anatomy Afr J Med Med Sci 1992, 21:41-45 Olaleye SB, Salami HA: Predictor of academic performance in the preclinical sciences: effects of age, sex and mode of ... et al.: Profile and professional expectations of medical students in Mozambique: a longitudinal study Human Resources for Health 2010 8:21 Submit your next manuscript to BioMed Central and take...
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báo cáo hóa học: " Hydration status and physiological workload of UAE construction workers: A prospective longitudinal observational study" pptx
Ngày tải lên :
20/06/2014, 00:20
... integrated measure of the dry bulb, wet bulb, wind speed and radiant heat From these variables, and taking into consideration the type of clothing worn and acclimatisation state of the worker, the ... engaged in the construction of a large concrete water feature outside of a multi-story office building The nature of the work precluded any provision of shade other than that offered by the nearby ... the end of each shift and the data used to calculate mean and maximum working heart rates as well as percentage of cardiac Page of 10 (page number not for citation purposes) Journal of Occupational...
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Family of Uniform Strain Tetrahedral Elements and a Method for Connecting Dissimilar Finite Element Meshes ppt
Ngày tải lên :
27/06/2014, 14:20
... deleting every third column and rows 3, 5, 6, 9, 11 and 12 of the matrix on the right hand side of Eq (57) In addition, one sets SZz= 1, Syz=0 and Szz =0 Simpo PDF Merge and Split Unregistered Version ... al., SAND98-0756, March 1998 Two basic issues addressed by the papers are: (1) the performance of alternative tetrahedral elements with uniform strain and enhanced uniform strain formulations, and ... performance of the ten-node element is signi~icantly bet ter than that of the four-node element Plots of E&v and EVOl ersus a for v = 0.499 are shown in Figures and Setting Q = O v for the eight and...
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Báo cáo toán học: "A Paintability Version of the Combinatorial Nullstellensatz, and List Colorings of k-partite k-uniform Hypergraphs" pps
Ngày tải lên :
08/08/2014, 12:23
... generalize Alon and Tarsi’s results about list colorability of bipartite graphs (2-partite 2 -uniform hypergraphs) to k-partite k -uniform hypergraphs Ramamurthi and West asked at the end of their paper ... analog of Alon and Tarsi’s result In the course of the described development Alon and Tarsi found the so called Polynomial Method and the Combinatorial Nullstellensatz [Al2, Scha1], which is of fundamental ... concept of list colorings This generalization is based on a different point of view Instead of assigning color lists Lv of size ℓv to the vertices v of a (hyper)graph, we assign sets of vertices...
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Báo cáo y học: "Genetic polymorphisms in PTPN22, PADI-4, and CTLA-4 and risk for rheumatoid arthritis in two longitudinal cohort studies: evidence of gene-environment interactions with heavy cigarette smoking" potx
Ngày tải lên :
09/08/2014, 10:23
... duration and intensity of exposure [30-35] Case-control studies conducted in Sweden, Holland, and North America have identified an interaction between presence of the HLA-SE alleles and cigarette ... cases and controls in these analyses were Caucasian, and the mean (± standard deviation) number of ACR criteria for the classification of RA was (± 1) [43] Table shows the characteristics of the ... (A slightly higher frequency of NHS cheek cell DNA samples could not be HLA genotyped: 3% of cases and controls, as compared with 0% to 2% of NHS and NHSII case and control DNA samples from blood.)...
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Báo cáo y học: "The loss of health status in rheumatoid arthritis and the effect of biologic therapy: a longitudinal observational study" pot
Ngày tải lên :
12/08/2014, 11:23
... generalizability, of the results of randomized trials is often low [16,17] Health status and functional status are central components of RA outcomes They are meaningful to patients and form the basis of cost-effectiveness ... (0.730, 0.749) Variable Effect of biologic therapy on annual rates of progression of disability, loss of health status, and costs in patients prior to and after the start of biologic therapy in RA ... its pattern of loss is similar to that of PCS and EQ-5D These data can be summed up as follows: on average, loss of health status occurs immediately, at the onset of RA, and most of the further...
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Cracking mode and shear strength of lightweight concrete beams
Ngày tải lên :
10/09/2015, 15:48
... CRACKING MODE AND SHEAR STRENGTH OF LIGHTWEIGHT CONCRETE BEAMS KUM YUNG JUAN (B.Eng (Hons.) Malaya) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CIVIL AND ENVIRONMENTAL ... SB and SX1 series beams 102 Figure 3-22 Crack pattern after physical failure of SB C50 and SB C70 series beams 103 Figure 3-23 Cracking patterns after physical failure of SXB and ... British Standard Institute’s “Structural Use of Concrete: Code of Practice for Design and Construction, BS 8110 : 1997”, and Eurocode 2: “Design of Concrete Structures” provides for the design of shear...
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Strengthening of RC beams and frames by external prestressing
Ngày tải lên :
14/09/2015, 08:50
... outside of concrete sections and prestressed longitudinally along the beam axis Some of the advantages of this method are: Light weight of the system, as the weight of tendons, anchors and deviators ... methods of strengthening, and not add much load to the structure; Easy installation and less interruption on the normal usage of the structure; and Possibility of re-stressing and replacement of tendons ... The flexural response of the frames was not affected by the tendon profile, in terms of beams deflections at service load level ix List of Notations LIST OF NOTATIONS a depth of equivalent rectangular...
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Effect of beam size and FRP thickness on interfacial shear stress concentration and failure mode of FRP strengthened beams
Ngày tải lên :
05/10/2015, 19:02
... strength of concrete Ga Shear modulus of adhesive hc Depth of beam I Second moment of area Itr Second moment of area of transformed cracked FRP section vi Itr,conc Second moment of area of transformed ... Series A, B and C beams 39 Figure 3.3 Reinforcement of Series A, B and C 39 Figure 3.4 Series A, B and C beams 40 Figure 3.5 Typical Series A beams test setup 40 Figure 3.6 Typical Series B beams test ... 2.16 and Ec,Ea Elastic modulus of concrete and adhesive, respectively Ga Shear modulus Ic,,Ifrp Second moment of area of concrete and FRP, respectively bfrp Width of the FRP Ac,Afrp Area of concrete...
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VIBRATION OF FUNCTIONALLY GRADED SANDWICH BEAMS EXCITED BY a MOVING h ARMONIC POINT LOAD DAO ĐỘNG của dầm SANDWICH có cơ TÍNH BIẾN THIÊN CHỊU KÍCH ĐỘNG của lực điều hòa DI ĐỘNG
Ngày tải lên :
08/06/2016, 13:00
... quasi-3D theory for vibration and buckling of functionally graded sandwich beams, Composite Structures, 2015, Vol 119, p 1-12 [5] Şimşek, M., & Kocatürk, T., Free and forced vibration of a functionally ... deflection parameter and the moving speed of FG sandwich beam with various values of index n and h c /h ratio In order to examine the effect of the material distribution and the core thickness ... the fundamental frequency of the beam, and ρ m and E m are the mass density and Young’s modulus of the core material, respectively The effect of the material index n and the core thickness to...
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09 Physical and Chemical Characteristics of DDGS revisions.
Ngày tải lên :
08/08/2012, 10:03
... Chemical Characteristics of DDGS Particle Size, Bulk Density and pH Particle size and particle size uniformity of feed ingredients are important considerations of livestock and poultry nutritionists ... during transport and handling – particle and ingredient segregation (separation) occurs when particles of different sizes and bulk densities are blended together and transported or handled Pellet ... (lightness of color) and b* (yellowness of color), with an increase in a* (redness of color) Similar results were also reported by Ganesan et al (2005) Table The Effect of the Rate of Solubles...
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Web Mining and Knowledge Discovery of Usage Patterns
Ngày tải lên :
31/08/2012, 16:46
... modeling of Web objects (products, service, pages etc) and subjects (users), categorization of objects and subjects, mapping between and across objects and/ or subjects, and determination of the set of ... semantics, and the support of navigation [2] J Borges and M Levene Data mining of user navigation patterns In Proceedings of the WEBKDD’99 Workshop on Web Usage Analysis and User Profiling, August ... types of data: data on the Web (content), Web log data (usage) and Web structure data The authors of [5] classified the data type as content data, structure data, usage data, and user profile...
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Static and Dynamic Analysis of Space frames
Ngày tải lên :
06/09/2012, 15:18
... result list of load cases, superposition files and influence lines 3.64 Version 8.38.03 • • • • Use of combination codes “SupOrX” and “SupAndX” for superposition files corrected New command “PLSCFAC” ... to choose between E- and Fformat of the written values Information about units added to the plot file of the action PlInfl, screen plot Results/ PlInfl and to the list file of the action DoList/Influence ... new program release! 1.2 Unit dependency of Import/Export of RM2000 Export and Import of RM2000 database is now UNIT dependent! In this case: • • Import of PARTIAL project, created by RM2000 Version...
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Static and Dynamic Analysis of Spaceframes
Ngày tải lên :
06/09/2012, 15:55
... Disclaimer and Copyright Disclaimer Much time and effort have gone into the development and documentation of RM2000 and GP2000 The programs have been thoroughly tested and used The user accepts and ... the two load sets and the two loading cases (e.g.: L.C is a UDL of 10kN/m from Elem to Elem 20 and L.C is a Settlement of 0.001m at the beginning of element 1200.) Choose AddCon and insert the ‘Additional ... the program and the documentation remain with TDV Austria Use of the program and the documentation is restricted to the licensed users Unlicensed use of the program or reproduction of the documentation...
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