introduction to basic engineering drawing
Tài liệu The Art Of Animal Drawing - Introduction To Basic Drawing docx
Ngày tải lên :
26/01/2014, 08:20
... see in front of you (or in a photo).
Two great exercises for training your eye to see are contour
drawing and gesture drawing.
PENCILING THE CONTOURS
In contour drawing, pick a starting point ... are with your tools, the better
your drawings will be!
ADDING ON
Unless you already have a drawing table, you will probably want
to purchase a drawing board. It doesn't have to be expensive; ... CHAPTER 1
INTRODUCTION TO
BASIC
DRAWING
Although the age-old art of pencil drawing is the basic foundation
of all the visual arts, its elemental beauty allows it to stand on its
own. And...
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An Introduction to Software Engineering
Ngày tải lên :
14/09/2012, 11:26
... Software Engineering, 7th edition. Chapter 1 Slide 2
Objectives
To introduce software engineering and to explain
its importance
To set out the answers to key questions about
software engineering
... the
customer wants
ã Evolution - changing the software in response to
changing demands.
©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 1 Slide 1
An Introduction to Software
Engineering
âIan ... Software
Engineering)
Software systems that are intended to provide automated
support for software process activities.
CASE systems are often used for method support.
Upper-CASE
ã Tools to support...
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Tài liệu Nhập môn công nghệ học phần mềm - Introduction to Software Engineering pptx
Ngày tải lên :
20/12/2013, 17:15
... SE, 2001 SE-I.38
1.5.2 Hiu sut x lý cao
ã
Hiu sut thi gian tốt (efficiency):
–
Độ phức tạp tính to n thấp (Time
complexity)
–
Thời gian quay vòng ngắn (Turn Around
Time: TAT)
–
Thời gian hồi ... Falt. of
IT
Dept. of SE, 2001 SE-I.42
2.1 Khng hong phn mm l gỡ?
ã
10/1968 ti Hi nghị của NATO các chuyên gia phần mềm đã
đưa ra thuật ngữ “Khủng hoảng phần mềm” (Software
crisis). Qua hàng ... theo thời gian (theo ni s dng)
ã
Hiu ng ln súng trong thay i phn mm
ã
Phn mm vn cha ý tng v sỏng to ca
tỏc gi/nhúm lm ra nú
ã
Cn kh nng t duy nh phõn trong xõy
dng, phỏt trin phn mm
ã
Cú th sao...
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Tài liệu Nhập môn công nghệ học phần mềm - Introduction to Software Engineering - Phần II docx
Ngày tải lên :
20/12/2013, 17:15
... các yêu cầu phần mềm và
thương lượng với khách hàng
Software
Software
Engineering
Engineering
Group
Group
Customer
Customer
Group
Group
HUT, Falt. of
IT
Dept. of SE, 2002 SE-III.27
Finite ... (reference) đến các mẫu khác
Car
Ford
Blue
ID
Automobile
Company
Ford
Tập các thuộc tính của 1 đối tượng dữ liệu được
xác định thông qua ngữ cảnh của bài to n
HUT, Falt. of
IT
Dept. of SE, ... tiết cài đặt (begin by
focusing on the essence of the problem
without regard to implementation
details)
New Tool: Unified Modeling Language (UML)!
HUT, Falt. of
IT
Dept. of SE, 2002...
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Tài liệu Nhập môn công nghệ học phần mềm - Introduction to Software Engineering - Phần IV pdf
Ngày tải lên :
20/12/2013, 17:15
...
IT
Dept. of SE, 2001 SE-V.1
Nhập môn
Công nghệ học Phần mềm
Introduction to Software Engineering
Department of Software Engineering
Faculty of Information Technology
Hanoi University of ...
trng (white box test): HOW ?
ã
Kim th Top-Down hay Bottom-Up
HUT, Falt. of
IT
Dept. of SE, 2001 SE-V.34
Bo trỡ ci tin (tip)
ã
Cũn gi l tỏi k ngh (re -engineering)
ã
Mc ớch: a ra mt thit ... SE-V.20
9.4 K thut kim th mụun
ã
Kim th tớch hp môđun
–
Kiểm thử dưới lên (Bottom-up Test)
–
Kiểm thử trên xuống (Top-down Test)
–
Kiểm thử cột trụ (Big bung Test)
–
Kiểm thử kẹp (Sandwich Test)
...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P1 docx
Ngày tải lên :
26/01/2014, 09:20
...
Semiconductor Devices
1. Semiconductor Devices
1.1 Semiconductors
1.1.1 Current in Conductors and Insulators
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Introduction to Electronic Engineering
6
Designations
Designations
С capacitor
D diode, thyristor
L inductor, choke ... Vodovozov
Introduction to
Electronic Engineering
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P2 pptx
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26/01/2014, 09:20
... conduction by transfer from atom to atom of electrons into available holes. A semiconductor in
which the conduction is due to holes referred to as a p-type semiconductor. Here, p stands for positive ... www.verypdf.com to remove this watermark.
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Introduction to Electronic Engineering
35
Semiconductor Devices
Another optoelectronic device is an optocoupler also ... collector and the base form the other diode. From now on, we refer to these diodes as
the emitter diode (the top one) and the collector diode (the bottom one). Accordingly, a bipolar
transistor...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P3 pdf
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26/01/2014, 09:20
... a cutoff region of the transistor where resistance is
high, and the small collector current is called a collector cutoff current. As usual, a designer never
allows voltage to get close to the ... Split-Merge on www.verypdf.com to remove this watermark.
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Introduction to Electronic Engineering
45
Semiconductor Devices
Darlington transistors. Since the current ... free books at BookBooN.com
Introduction to Electronic Engineering
52
Semiconductor Devices
In its most basic form, the MOSFET looks like a voltage-controlled resistor, the resistance of which...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P4 docx
Ngày tải lên :
26/01/2014, 09:20
... biasing resistors, the collector resistor, the emitter
resistor, and the transistor.
The key to building the more efficient amplifiers is to reduce the unwanted power losses. One way to
reduce ... www.verypdf.com to remove this watermark.
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Introduction to Electronic Engineering
64
Semiconductor Devices
Triac. A triac (bi-directional thyristor, simistor, tetrode ...
Resistors. Resistors come in a variety of sizes, related to the power they can safely dissipate. Color-
coded stripes on a real-world resistor specify its resistance R and tolerance. Larger resistors...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P5 doc
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Introduction to Electronic Engineering
97
Electronic Circuits
different types: hydro, wind, and heat generators, atomic ... and distortion. The resistor R
1
is
another attempt to stabilize the Q point using a negative collector feedback. When the current gain
increases, the collector current reduces the collector ... potential of the left transistor is supported
slightly negative regarding to the ground. Thus, the left transistor is opened. The right transistor shifts
the output voltage to the zero and amplifies...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P6 doc
Ngày tải lên :
26/01/2014, 09:20
... way to open the latch is to reduce the load current to zero. Another way is to apply
a reverse bias trigger to the bottom base instead of a positive one. This will rapidly drive both
transistors ... BookBooN.com
Introduction to Electronic Engineering
111
Electronic Circuits
Differentiators. Fig. 2.39,a illustrates the op amp differentiator or D-regulator. A differentiator is a
circuit ... current drops to zero, Q point sets to the cutoff. Because of this, the collector current
drops to zero. With no current, all the collector supply voltage will appear across the collector-emitter...
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Tài liệu INTRODUCTION TO ELECTRONIC ENGINEERING- P7 doc
Ngày tải lên :
26/01/2014, 09:20
...
resistor of its collector. This change is transferred through the corresponding capacitor to the base of
the other transistor so that the current grows increasingly up to the first transistor ... Download free books at BookBooN.com
Introduction to Electronic Engineering
122
Electronic Circuits
Astable multivibrators. A multivibrator is a rectangle pulse generator with the positive feedback. ... of resistors R
B
and on the capacitors.
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