high silica zeolites with mtw framework topology
synthesis of high-silica aluminosilicate zeolites
Ngày tải lên :
31/05/2014, 02:07
... materials ZSM-39 high- silica ZSM-6 with TMA high- silica mordenite ZSM-12 zeolite PHI zeolite BETA zeolite ZSM-25 ZSM-5 with TPA ZSM-ll ZSM-8 ZSM-48 ZSM-22 HIGH- SILICA ZEOLITES WITH SOLVED STRUCTURE-TYPE ... CHAPTER VII: HIGH- SILICA ZEOLITES WITH MTT FRAMEWORK TOPOLOGY 251 * MTT structure types * Synthesis of MTT and related zeolites * References 251 260 274 CHAPTER VIII A FAMILY OF ZEOLITES WITH DISORDERED ... Influences of silica: alumina ratio Nature of templates * Morphology and sorption capacity * References 275 275 281 281 283 284 289 295 CHAPTER IX : HIGH- SILICA ZEOLITES WITH MTW FRAMEWORK TOPOLOGY...
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Tài liệu High Availability Networking with NetWare 6: NSS 3.0 and Cluster doc
Ngày tải lên :
09/12/2013, 17:15
... NSS mounts any size volume with as little as to 10 megabytes (MB) of memory NSS lets systems with limited resources perform better, while larger systems provide even higher performance NSS provides ... objects without degrading system performance It provides extremely fast access to your data NSS allows volumes to be mounted and repaired in seconds rather than the hours it would take with NetWare’s ... repaired With the traditional NetWare file system, running VRepair could take hours to complete, since the amount of time required to mount a volume is related to the size of the volume With NSS,...
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Tài liệu Beating the High-Rise Hunt with In-Building Wireless doc
Ngày tải lên :
17/01/2014, 11:20
... provided its own cellular signals With strong and uniform signals coming from antennas located in the ceilings of each floor, cell phone users would have clear and highly reliable connections • Minimize ... individual tenant needs Solution • Multi-carrier DAS with single set of electronics • Easy, flexible CATV cabling for hub-antenna connections • High, uniform power output and flexible CATV cabling ... fact, T-Mobile is in discussions with Cousins Properties about adding a base station of its own, since one of the property’s major new tenants has a corporate contract with that carrier and has asked...
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Báo cáo khoa học: Secondary transporters of the 2HCT family contain two homologous domains with inverted membrane topology and trans re-entrant loops docx
Ngày tải lên :
07/03/2014, 17:20
... ST3 with scope subfamily, 77% with scope family, and 11% of the links with scope class (Fig 1, NN) The distribution of the hits between the C-terminal domains was very similar (Fig 1, CC) with ... C-terminal halves of the ST3 sequences score significantly higher than random with 2.6% observed hits and over 30% of hits with pE ‡ In comparison with the OPA family, it should be noted that the ST3 ... functional importance of the region is in line with the high degree of conservation of the amino acid sequence, while the presence of a high proportion of residues with small side chains may reflect the...
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Getting Started with Zend Framework By Rob Allen ppt
Ngày tải lên :
22/03/2014, 10:20
... correctly Getting the Framework Zend Framework can be downloaded from http:/ /framework. zend.com/download in either zip or tar.gz format Directory Structure Whilst Zend Framework doesn’t mandate ... requirements: • PHP 5.1.4 (or higher) • A web server supporting mod_rewrite functionality Tutorial Assumptions I have assumed that you are running PHP 5.1.4 or higher with the Apache web server ... name}Controller.php within the application/controllers directory Again {Controller name} must start with a capital letter and every other letter must be lowercase Each action is a public function within the...
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php architects guide to programming with zend framework
Ngày tải lên :
05/04/2014, 19:27
... Dai (neriodavid@gmail.com) php|architect’s Guide to Programming with Zend Framework php|architect’s Guide to Programming with Zend Framework Contents Copyright ©2007-2008 Calvin Evans – All Rights ... Introducing Zend Framework A Brief History of Zend Framework The Zend Framework Community The Zend Framework License and Intellectual ... is the plethora of frameworks available The chief advantage of using a framework is maintainability - frameworks provide a system and method for organizing code, but each framework is different,...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_1 pot
Ngày tải lên :
21/06/2014, 22:20
... succinctly in his statement: ‘From any standpoint, the material with the best machinability is the one permitting the fastest removal of chips with satisfactory tool life and surface finish.’ This ‘Boulger ... microstructure, heat-treatment, purity, together with many more effects which influence the overall machining operation In Fig 144, this diagram attempts to highlight some of the important factors that ... correlation between the chemical composition test and ‘absolute tests’ has been obtained with accuracies claimed to within 8% For example, the relationship between chemical composition and cutting speed...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_2 docx
Ngày tải lên :
21/06/2014, 22:20
... an uncoated cemented carbide P20, or P10 grade would have been used, since these grades withstand both higher speeds and have better tool wear resistance to that of previously utilised cutting ... texture degrades, with the number of facing-off passes 281 282 Chapter tions For a practical machinability trial employing a ‘Latin square’ , it uses a two-way ANOVA13 table, with a limited amount ... ‘Taguchi-approach’ The main problem with these ‘arrays’ is that in many situations the large number of ‘interactions’ (i.e factors) have been shown to interfere with the overall results – introducing...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_4 pot
Ngày tải lên :
21/06/2014, 22:20
... – creating improved stability at higher speeds, NB An insufficient feedrate in comparison to the insert edge radius produces a less efficient cutting action, with more tool deflection and reduced ... damping capacity Further, machining stability can be increased by utilising tooling with the greatest possible diameter with the minimum of tool overhang By way of a caution concerning chatter frequency, ... deflection 301 stand-off distances, conducive with correct and current operational practices There are several distinct problems involved in the milling high- quality circular interpolated features...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_5 pdf
Ngày tải lên :
21/06/2014, 22:20
... show exasperation by many metrolo- gists’ with this ever-increasing development of such parameters Many researchers and companies were totally disenchanted with their confunsion and plight, so they ... nature of the actual surface condition If this machined workpiece was to be used in a critical and highly-stressed in-service environment, then the user would have a false sense of the component’s ... height What is more, the ‘N-number’ has been used to ascertain the arithmetic roughness ‘Ra’ value – with more being mentioned on this and other parameters shortly The actual ‘N-value’ being just one...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_7 ppt
Ngày tải lên :
21/06/2014, 22:20
... the profile ordinates measured from the lowest valley and above, with notation ‘b’ being given to weighting the profile from the highest peak down Hence, peaks and valleys have accordingly different ... ‘beta-function’ equation above, from: 0→1 to Rp + Rv, or indeed with that of Rt, then substituting σ (i.e the standard deviation of the distribution) with Rq, the beta-function parameters ‘a’ and ‘b’ become: ... any dominant peak, or valley within the assessment length is only raised to a unit power, infers additional stability over the ‘skewness/kurtosis approach’ The problem with this ‘beta-function’...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_8 doc
Ngày tải lên :
21/06/2014, 22:20
... generally on a quantitative basis Today, we are concerned with ‘atomic migration’ within metallic solid solutions Fick produced two laws, with Fick’s 1st Law stating: ‘That the amount (J) of a material ... when high pressures (i.e compression) are exerted on the cutting edge in combination with elevated temperatures Conditions likely to create plastic deformation on the cutting insert are when high ... compacts without coolant Here, the cutting speed was raised by 25% above the optimum, with the feedrate 40% greater than usually specified This ‘abusive machining regime’ , created high flank...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_9 docx
Ngày tải lên :
21/06/2014, 22:20
... machine/labour/overhead costs (Cm); with tooling cost (CT) The zenith of this curve (Fig 177e), represents the highest production rate (Prmax) While the cutting speed (Vq) is associated with the peak of the ... the tool and workpiece, together with micro-fractures and -fissures occur These mechanical phenomena produce measurable cutting and forming forces with very high- frequency acoustic emissions ... material would have to have infinitely high resistance, together with amplifiers that are perfectly free from any form of leakage and ‘non-operate currents’ , with an amplification factor of infinity!...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_10 ppt
Ngày tải lên :
21/06/2014, 22:20
... close correlation with experimental results was obtained when machining synthetic plastics, but a somewhat poor theoretical correlation occurred when steel had been machined with cemented carbide ... the tool/chip interface are exceedingly high, typically when machining commercial grades of medium carbon plain steels these pressures are >3.5 GPa This high normal pressure at the ‘interface’ ... the chip losses contact with the tool’s face, ‘q’ and ‘y’ = are constants The maximum normal stress ‘σfmax’ occurs when ‘x’ equals ‘lf’ , so: σfmax = qlfy or, transposing with respect to ‘q’: q = σfmaxlf–y...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_11 pot
Ngày tải lên :
21/06/2014, 22:20
... cutting/fracture sequence indicated with confirmation of work-hardening having ‘layered scales’ of with cracks and crevices beneath them Conversely, the test specimen machined at high cutting speed (Fig ... component’s surface Residual Stress Deformations For any residual stresses acting within a body (i.e component), they will occur without any external forces, or moments Internal forces form a system that ... speed, with its accompanying amplification of induced temperature effects as ‘speeds’ are increased Moreover, it can also be said, 84 ‘Vickers indentor’ , has a square-based dymond pyramid with...
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Machining of High Strength Steels With Emphasis on Surface Integrity by air force machinability data center_12 pptx
Ngày tải lên :
21/06/2014, 22:20
... workhardening materials having long length-to-diameter ratios (i.e L/D ratios of >12:1) with inadequate coolant supply, creating high levels of friction, this condition being exacerbated by an inefficiency ... individual tooth (i.e with the other teeth removed, hence, acting as ‘Fly-cutter‘), then after 91 By way of comparison of this untempered martensitic ‘whitelayer’ phase, a conventional high- speed steel ... that they are the product of hard, brittle and unstable layers, with tensile residual stresses present These factors, combined with an acute alteration to the bulk substrate, are likely to ‘spall’...
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Báo cáo y học: "Preoperative diastolic function predicts the onset of left ventricular dysfunction following aortic valve replacement in high-risk patients with aortic stenosis" docx
Ngày tải lên :
13/08/2014, 20:22
... observed in 28 out of 30 patients (90%) with low Vp (≤40 cm/sec) as opposed to out of 64 patients with normal-to -high Vp Discussion In this prospective study, 40% of high- risk patients undergoing aortic ... reported within a wide range (37% to 99%) and with considerable inter-reader variability (3% to 21%) [34,35] In agreement with other studies, we could easily determine Vp in all patients without ... mortality was only 10.6% As shown in Table 4, compared with patients without postCPB LV dysfunction, those experiencing LV dysfunction presented higher in-hospital mortality (18.4% vs 3.6%, P = 0.044)...
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Tự học Zend Guide to programming with zend framework 2010
Ngày tải lên :
30/09/2014, 23:12
... at http:/ /framework. zend.com/ The Zend Framework community wiki, at http:/ /framework. zend.com/wiki/ Zend Framework usage statistics, at http:/ /framework. zend.com/about/numbers Zend Framework ... http:/ /framework. zend.com/about/casestudies Zend Framework components, at http:/ /framework. zend.com/about/components The Zend Framework CLI tool, at http:/ /framework. zend.com/manual/en/zend.tool .framework. clitool.html ... documentation—the manual for Zend Framework v1.9 (circa 2009) weighs in at 3.7MB, as compared to the 780KB manual that shipped with Zend Framework v1.0 in 2007 Zend Framework: A Beginner’s Guide...
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