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Ngày tải lên: 27/03/2014, 01:22

... enter key words which will help you find the information you need. The BBC __________ (www.bbc .co. uk) is particularly recommended for news and information from around the world. Look at the pairs ... True or false: Great Britain is another name for the UK. 4. Is there just one government for the whole of the UK? 5. Who is the Head of State of the UK? 6. Where might you expect to hear Welsh ... from the north coast of Scotland to the south coast of England? 22. How far is it (in miles) across the widest part of the United Kingdom, from the west coast of Wales to the east coast of England? 23....

Ngày tải lên: 08/08/2012, 17:32

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Ngày tải lên: 05/09/2013, 08:40

Ngày tải lên: 05/09/2013, 08:40

Ngày tải lên: 22/10/2013, 15:15

... registry. For this reason it is very often considered a security risk and is not even allowed through firewalls. Consequently, ActiveX controls still can't really be considered either a common ... whose content consists of some HTML code that was typed directly into a text editor and saved as an .htm or .html file. Thus, the author of the page has already completely determined the exact content ... don't need to connect, you can correct this misperception by changing the way that IE looks for pages. To do this, select the Tools | Connections option and select Never dial a connection. Chapter...

Ngày tải lên: 06/11/2013, 00:15

... Standard Code for Information Interchange. A code for represent- ing alphanumeric information. Ascoli Giulio Ascoli (1843–1896), Italian analyst. Ascoli’s theorem Let {f n } be a family of uniformly ... or com- mutative if a · b = b · a for all a, b ∈ G. Abelian theorems (1) Suppose  ∞ n=0 a n x n converges for |x| <Rand for x = R. Then the series converges uniformly on 0 ≤ x ≤ R. (2)Forn ... func- tion of cosine. The arccosine of a number x is a number y whose cosine is x, written as y = cos −1 (x) = arc cos(x), i.e., x = cos(y). arccotangent The inverse trigonometric function of cotangent....

Ngày tải lên: 10/12/2013, 12:15

Ngày tải lên: 10/12/2013, 14:15

Ngày tải lên: 12/12/2013, 20:28

... CHANNEL HYDRAULICS FOR ENGINEERS v 2.3.1. Concept 32 2.3.2. Conditions for maximum discharge 32 2.3.3. Problems of uniform-flow computation 36 2.4. Channel with compound cross-section ... model characteristics; roller x x-component y y-component z z-component 1 upstream flow conditions 2 downstream flow conditions OPEN CHANNEL HYDRAULICS FOR ENGINEERS vii LIST OF ... through open channel 6 1.2. Structure of the course 7 1.2.1. Objectives of the course 7 1.2.2. Historical note for the course 7 1.2.3. Structure of the course 8 1.3. Dimensional analysis 10 1.3.1....

Ngày tải lên: 20/12/2013, 19:15

... the prototype are acted on by corresponding forces. These forces are the force of gravity F g , the pressure force F p , and the viscous resistance force F v . These forces add vectorially in ... them have corresponding forces. Or in other words, dynamic similarity is said to exist between the model and the prototype, if the ratios of the corresponding forces acting at corresponding ... resultant force F R , which will in turn produce an acceleration of the volume of fluid in accordance with Newton’s second law. Rm m m Rp p p F M a F M a  OPEN CHANNEL HYDRAULICS FOR ENGINEERS...

Ngày tải lên: 20/12/2013, 19:15

... Problems of uniform-flow computation The computation of uniform flow may be performed by the use of two equations: the continuity equation and a uniform-flow formula. When the Manning formula is ... be controlled by checks. In hard-surfaced channels, silting is easily controlled if fall for scouring velocity is available. OPEN CHANNEL HYDRAULICS FOR ENGINEERS Chapter 2: UNIFORM ... uniform flow computation: A. to compute the normal discharge: In practical applications, this computation is required for the determination of the capacity of a given channel or for the construction...

Ngày tải lên: 20/12/2013, 19:15

... C h depth E E min E vs h for q = constant OPEN CHANNEL HYDRAULICS FOR ENGINEERS Chapter 3: HYDRAULIC JUMP 64 3.5.4. Energy loss We continue considering that the energy-head ... This force is responsible for change of velocity from V 1 to V 2 . We know that this force is also equal to the change of momentum of the control volume: Force = mass of water flowing per second ... (energy) correction coefficient accounting for using the depth-avegared flow velocity instead of the (full) velocity distribution. For a channel of large slope angle  and velocity distribution coefficient...

Ngày tải lên: 20/12/2013, 19:15

... CHANNEL HYDRAULICS FOR ENGINEERS Chapter 4: NON-UNIFORM FLOW 73 4.1.3. Equation of non-uniform flow Fig. 4.3. Non-uniform flow Consider a non-uniform flow in an ... required for this channel to be OPEN CHANNEL HYDRAULICS FOR ENGINEERS Chapter 4: NON-UNIFORM FLOW 83 4.3.4. Composite flow profiles with various controls Channels with a number of controls ... energy line, as was the case for uniform flow. The following points are made in connection with the above observations. upstream control downstream control control sluice gate rapid...

Ngày tải lên: 20/12/2013, 19:15

... CHANNEL HYDRAULICS FOR ENGINEERS Chapter 5: SPILLWAYS 105 5.5.2. Broad-crested weir discharge formula Consider the section on the weir crest in case of a critical flow condition At this ... 0.623 The more modern formulae of Hegly, 1921, and the Swiss Society of Engineers (SIA), 1924, for rectangular contracted weirs reproduce basically the same idea. These formulae are quoted below: ... smaller than for rectangular weirs, as the cross-sectional area of the notch is small in comparison with the channel cross-section. This condition would ordinarily apply to weirs designed for accurate...

Ngày tải lên: 20/12/2013, 19:15

... face of a dam is sometimes constructed of high-grade concrete, whereas the inner core of the dam wall is constructed of economical low-grade concrete, mixed and compacted in place, i.e. the ... surface contours flow positive waves, i.e. increasing depth and converging contours negative waves, i.e. decreasing depth and diverging contours OPEN CHANNEL HYDRAULICS FOR ENGINEERS ... We can therefore write, using the terms defined in Fig. 6.6,   1 1 2 1 V cos V cos       (6-7) Considering now the velocity components normal to the wave front, the continuity equation...

Ngày tải lên: 20/12/2013, 19:15

... steady uniform flow steady non-uniform flow unsteady non-uniform flow 1 2 h +z Q 1 Q 2 x datum OPEN CHANNEL HYDRAULICS FOR ENGINEERS Chapter 7: UNSTEADY FLOW 136 Continuity: ... Fig. 7.2. Definition sketch for the equation of continuity In Section 1.1.3, Chapter 1, the equation of continuity is written in the form: Q 1 = Q 2 = constant But in this case, the ... depth h and, according to Sergio Montes (1998), their relation /c equals 2 for a rectangular section and /c = 4 for a triangular section, with values comprised between these limits for trapezoidal...

Ngày tải lên: 20/12/2013, 19:15

... discussion, VR technology provides the tools for an enhanced level of interaction in three dimensions with the computer. The need for real-time performance while depicting complex virtual ... this is that the VR technology has become available at an affordable price so as to be considered a viable tool for interactive design and analysis. Mechanical Engineers& apos; Handbook, ... Environment for Computer-Aided Design," in Proceedings of the ACM SIGCHI 1994 Conference: CHI'94 Human Factors in Computing Systems, Boston, WWW URL: http://gummo.stanford.edu/ html/DesignSpace/home.html 29....

Ngày tải lên: 23/01/2014, 07:20