vậy m apos d 49 06 nm
Tài liệu EXCERPT: Positively M.A.D. docx
Ngày tải lên :
14/02/2014, 00:20
... commiserated, and asked what I could to help.We agreed I would publish my next book with him Then I called Peter Block and Marvin Weisbord and told them what had happened to Steve They too moved ... exceptionally dedicated and talented editorial, design, and marketing team.” You can hear the loyalty in David’s words Do you know how valuable that is? And, you are already experiencing my third example: ... become a committed community This year, they decided to contribute to the world by writing this book and offering the “POSITIVELY M. A .D. ” conference held November 6, 2004 Do you know of many...
- 23
- 264
- 0
dce2008Chương 3 K thu t mã hóa tín hi uBKTP.HCMD D D Dli li li liu s , tín hi u s u s , tín hi u tương t u tương t , tín hi u s u tương t , tín hi u tương t.dce2008Tín hi u analog• Ba đ c đi m chính c a tín hi u analog bao g m– Biên đ (A ppt
Ngày tải lên :
15/03/2014, 22:20
... “B00V” Data Communication and Computer Networks ©2008, Dr Dinh Duc Anh Vu 22 dce 2008 B8ZS HDB3 Data Communication and Computer Networks ©2008, Dr Dinh Duc Anh Vu 23 dce 2008 Bài t p Data Communication ... Đi u ch Delta: Delta Modulation (DM) Data Communication and Computer Networks Analog → Digital PCM DM ©2008, Dr Dinh Duc Anh Vu 37 dce 2008 Đi u ch xung m (PCM) • Lý thuy t l y m u – “N u tín ... 1.76 (dB) – M i bit d ng th m cho lư ng t hóa s tăng SNR 6dB Data Communication and Computer Networks ©2008, Dr Dinh Duc Anh Vu 40 dce 2008 Đi u ch xung m (PCM) Data Communication and Computer...
- 57
- 266
- 0
quantum groups and noncommutative spaces - persps. on quantum geometry - m. marcolli, d. parashar (teubner, 2011) ww
Ngày tải lên :
03/05/2014, 17:52
... U(A, meven ) and U(A, modd ), respectively, on D0 (A, meven , modd ) odd even defined by having (Uαβ ) ∈ U(A, modd ) and (Uαβ ) ∈ U(A, meven ) act on γ α δ (M β ; M β ; Nαβ ) ∈ D0 (A, meven , modd ... (4.17) D0 (A, meven , modd ) := b b α,β∈A γ∈A γ=α Mnγ modd ×nα meven (C) γβ αβ × sl(nα ) ⊗ Mmodd ×meven (C) × αβ αβ b δ∈A Mmodd nδ ×meven nβ (C), αδ αβ and identify ULR (Heven ) and ULR (Hodd ) ... bimodeven : MS (Z≥0 ) × MS (Z≥0 ) → Bimodeven (A) defined by bimodeven := C −1 ◦ (bimod × bimod) is an isomorphism of monoids Just as in the odd case, we will find it convenient to denote (bimodeven...
- 250
- 439
- 0
k. tra kì II (M.TRẬN + Đ.ÁN)
Ngày tải lên :
07/07/2014, 08:00
... ứng .D ng quỳ t m cho vào ống nghi m: Ống nghi m l m quỳ t m chuyển sang xanh NaOH Ba(OH)2,l m quỳ t m chuyển sang đỏ HCl,H 2SO4,HNO3.Ống không l m quỳ đổi m u NaCl 0,25đ D ng nh m l m quỳ t m hoá xanh ... Chỉ d ng quỳ t m hóa chất khác nhận biết dung d ch đựng bình nhãn sau:NaOH;Ba(OH)2;NaCl;HCl;HNO3;H2SO4 Câu3: Quỳ dung d ch muối AgNO3 Trích m u từ bình cho ống nghi m, đánh số thứ tự tương ứng .D ng ... đổ vào nh m l m quỳ t m hoá đỏ Thấy xuất kết tủa trắng chất cho vào Ba(OH)2 ,còn chất ba ống nghi m H2SO4 Phương trình: Ba(OH)2 + H2SO4 ->BaSO4 +2H2O 0,5đ Và nhận NaOH 0,25đ Cho dung d ch AgNO3...
- 2
- 234
- 0
bài thu hoạch và đăng ký thực hiên 2 chuyên đề học tập và lam theo tấm gương đ HCM
Ngày tải lên :
11/07/2014, 15:00
... nhân d n Phục vụ nhân d n phải quan t m, ch m lo m t đời sống nhân d n, t m cách thoả m n nhu cầu, lợi ích nhân d n Phải tôn trọng quyền l m chủ nhân d n xác đònh d n m l m việc Phục vụ nhân d n ... Nam Sự nghiệp cách m ng Người ln gắn bó chặt chẽ với nghiệp cách m ng Đảng, với vận m nh giai cấp cơng nhân, nhân d n lao động tồn thể d n tộc Việt Nam + Thắng lợi cách m ng Việt Nam 80 n m qua ... nghĩa chiến lược bản, lâu d i thực tiễn trước m t cơng tác xây d ng Đảng + Xây d ng Đảng ln ln nhi m vụ quan trọng nghiệp cách m ng Đảng Đảng phải sạch, vững m nh, có t m cao trí tuệ, sức chiến...
- 5
- 532
- 1
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 1 pptx
Ngày tải lên :
11/08/2014, 02:22
... pure metals at room temperature Pure metal Structure Unit cell dimensions (nm) a Aluminium Beryllium Cadmium Chromium Cobalt Copper Gold Hafnium Indium Iridium Iron Lanthanum Lead Magnesium Manganese ... aluminium-based metals Metal Typical composition (w t%) 1000 Series unalloyed Al 2000 Series major additive Cu 3000 Series major additive Mn 5000 Series major additive Mg 6000 Series major additives ... composite materials 277 D Designing with metals, ceramics, polymers and composites 27 Design with materials 289 the design-limiting properties of metals, ceramics, polymers and composites; design...
- 23
- 389
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 2 pot
Ngày tải lên :
11/08/2014, 02:22
... phase diagram for the copper-antimony system is shown on the next page The phase diagram contains the intermetallic compound marked “X” on the diagram Determine the chemical formula of this compound ... outside with your hands for a minute!) liquid and be pumped away And for ordinary castings “degassing” chemicals are added which react with the dissolved gases to form gaseous compounds that bubble ... some aluminium sheet in a dish of molten gallium and watch the individual grains of aluminium come apart as the gallium whizzes down the boundary The second phase can, of course, form complete...
- 27
- 342
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 3 ppsx
Ngày tải lên :
11/08/2014, 02:22
... standard laboratory equipment and is mounted on an ordinary transmission light microscope In order to predict the speed of the process we must find out how quickly individual atoms or molecules diffuse ... the interface is cooled to 35°C the speed is about 0.6 mm min−1 At 30°C the speed is 2.3 mm min−1 And the maximum growth speed, of 3.7 mm min−1, is obtained at an interface temperature of 24°C (see ... calculate driving forces in materials processes? A good example to begin with is solidification – most metals are melted or solidified during manufacture, and we have already looked at two case studies...
- 27
- 383
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 4 docx
Ngày tải lên :
11/08/2014, 02:22
... be watched The casting “material” used is ammonium chloride solution, made up by heating water to 50°C and adding ammonium chloride crystals until the solution just becomes saturated The solution ... is then warmed up to 75°C and poured into the cold mould When the solution touches the cold metal it cools very rapidly and becomes highly supersaturated Ammonium chloride nuclei form heterogeneously ... iodide The most celebrated ice nucleating catalyst, produced by the microorganism Pseudomonas syringae, is capable of forming nuclei at undetectably small undercoolings The organism is commonly...
- 27
- 336
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 7 doc
Ngày tải lên :
11/08/2014, 02:22
... 16.2 mm, or less 14.4 Aluminium sheet is to be rolled according to the following parameters: sheet width 300 mm, starting thickness mm, reduced thickness 0.8 mm, yield strength 100 MPa, maximum ... carbide) are now under development and may have important high-temperature application in the next decade The examples are summarised in Table 15.6 Time exponent n Fracture toughness (MPa m1 /2) Melting ... and minerals, including ice As with metals, the number of different ceramics is vast But there is no need to remember them all: the generic ceramics listed below (and which you should remember)...
- 27
- 296
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 8 ppsx
Ngày tải lên :
11/08/2014, 02:22
... shaped clay is dried and fired, one component in it melts and spreads round the other components, bonding them together Low-grade ceramics – stone, and certain refractories – are simply mined and ... Modulus-of-rupture tests were done on samples of ceramic with dimensions l = 100 mm, b = d = 10 mm The median value of σ r (i.e σ r for Ps = 0.5) was 300 MPa The ceramic is to be used for components ... for an elastic beam it is related to the maximum moment in the beam, Mr , by 182 Engineering Materials σr = Mr bd (17.2) where d is the depth and b the width of the beam You might think that σr...
- 27
- 347
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 9 ppsx
Ngày tải lên :
11/08/2014, 02:22
... polyesters (both widely used as matrix materials for fibre-reinforced polymers) and the formaldehyde-based plastics (widely used for moulding and hard surfacing) Other formaldehyde plastics, which ... (Chapter 27) Most polymers are made from oil; the technology needed to make them from coal is still poorly developed But one should not assume that dependence on oil makes the polymer industry specially ... Further reading J M Illston, J M Dinwoodie, and A A Smith, Concrete, Timber and Metals, Van Nostrand, 1979 D D Double and A Hellawell, “The solidification of Portland cement”, Scientific American, 237(1),...
- 27
- 283
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 10 potx
Ngày tải lên :
11/08/2014, 02:22
... general: similar polymers should have similar normalised diagrams.) The diagram is divided, like the modulus diagram, into fields corresponding to the five strength-limiting processes described earlier ... allowing them to be formed by injection moulding, vacuum forming, blow moulding and compression moulding Thermosets, on the other hand, are heated, formed and cured simultaneously, usually by compression ... into monomer units; others (PE, for instance) randomly degrade into many products It is commercially important that no decomposition takes place during hightemperature moulding, so a maximum safe...
- 27
- 285
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 11 pot
Ngày tải lên :
11/08/2014, 02:22
... mm Special topic: wood 277 Chapter 26 Special topic: wood Introduction Wood is the oldest and still most widely used of structural materials Its documented use in buildings and ships spans more ... timber into board such as laminated plywood, chipboard and fibre-building board Summary: wood compared to other materials The mechanical properties of wood (a structural material of first importance ... Mechanics of Wood and Wood Composites, Van Nostrand Reinhold, 1982 J M Dinwoodie, Timber, its Nature and Behaviour, Van Nostrand Reinhold, 1981 B A Meylan and B G Butterfield, The Three-dimensional...
- 27
- 277
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 12 ppsx
Ngày tải lên :
11/08/2014, 02:22
... and R Morrell, Design with Non-Ductile Materials, Applied Science Publishers, 1982 D W Richardson, Modern Ceramic Engineering, Marcel Dekker, 1982 (d) Polymers DuPont Design Handbooks, DuPont de ... deflection of the end discs Using the standard beam-bending formula of d2 y M = dx EI (28.5) 302 Engineering Materials we can write dy dy = − B dx A dx Setting lm M ∫ EI dx (28.6) dy ... shaft-plate weld (Fig 28.4) We can calculate the maximum stress from the standard formula σmax = Mc I (28.1) where the bending moment M is given by M = Fx (28.2) and the second moment of area of...
- 27
- 248
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 13 pdf
Ngày tải lên :
11/08/2014, 02:22
... the same method Reminder One-component systems Binary (A + B) systems Ternary (A + B + C) systems Quaternary (A + B + C + D) systems independent independent independent independent and XD variables ... a fibre volume fraction of 0.13 If the wooden soundboard is mm thick the replacement composite must be 1.98 mm thick with a cardboard core of 1.25 mm Background reading M F Ashby and D R H Jones, ... around 0.2 Mg m 3 To match the mass of the sandwich to that of the spruce soundboard we must then have 0.39dw = 1.25 (d2 − d1 ) + 0. 2d1 (28.32) dw = 3.2 1d2 − 2.6 9d1 (28.33) or Fig 28.22 Sandwich-type...
- 27
- 290
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 14 ppsx
Ngày tải lên :
11/08/2014, 02:22
... Engineering Materials 2.5 (a) (b) (c) (d) Tin-rich solid plus lead-rich solid Liquid plus tin-rich solid Lead-rich solid only Liquid only 2.6 (a) Liquid plus lead-rich solid between and (b) Lead-rich ... boundary which limits the bottom of the liquid field is called the liquidus line The other boundary of the two-phase liquid–solid field is called the solidus line The liquidus lines start from the ... proper composition, the inside (which solidified first) does not The inside is purer than the outside; there is a composition gradient in each (Pb) grain, from the middle to the outside This gradient...
- 27
- 224
- 0
Engineering Materials Vol II (microstructures_ processing_ design) 2nd ed. - M. Ashby_ D. Jones (1999) WW Part 15 doc
Ngày tải lên :
11/08/2014, 02:22
... (mm4) ratio of Csolid/Cliquid on phase diagram (dimensionless) Boltzmann’s constant (J K−1) shear yield strength (MPa) fracture toughness (MPa m1 /2) liquid phase Symbols and formulae Symbol Meaning(units) ... Meaning(units) m m M MF MS n p Pf PS q Q r* R T Te Tg Tm ∆T ν V V WA Wf XA α γ δ ε εf ε ss η ν ρ σ σc σr σ TS σy mass (kg) Weibull modulus (dimensionless) bending moment (N m) martensite finish temperature ... 225 woods 278 Decomposition of polymers 246 Degree of polymerisation 228 Dendrites 65, 92, 352 Density of ceramics and glasses 164 foams 272 metals 12 polymers 224 woods 278 Design-limiting properties...
- 14
- 330
- 0