Tài liệu Fundamentals of Electrical Contacts doc

... application of electrical contacts. For example, the era of the information highway and the development of the integrated circuit have created new challenges in the use of electrical contacts. The use of ... HEAVY- AND MEDIUM-DUTY CONTACTS Electrical Machines. Because sliding contacts of electrical machines, apparatuses, and transport pick-offs require substantial co...

Ngày tải lên: 18/02/2014, 22:20

... display) Fundamentals of Digital Electronics 10-6 © National Instruments Corporation Lab 10 Seven-Segment Digital Displays Notes © National Instruments Corporation 11-1 Fundamentals of Digital ... period of time. This timing period is the reciprocal of the Baud rate, the frequency of data transmission measured in bits per second. For example, a 300 Baud data rate has a timing...

Ngày tải lên: 13/12/2013, 01:15

Ngày tải lên: 20/12/2013, 17:15

... cost/performance trade-offs than those using current costs. The caption of Figure 1.3 discusses some of the long-term trends in DRAM cost. FIGURE 1.3 Prices of four generations of DRAMs over time ... instruction formats, and a large number of registers. Figure 2.30 shows the ratio of the number of instructions executed, the ratio of CPIs, and the ratio of performance measu...

Ngày tải lên: 22/12/2013, 10:16

... Types of Protection for Hazardous Areas 254 10.5.1 Type of protection ‘d’ 255 10.5.2 Type of protection ‘e’ 256 10.5.3 Type of protection ‘i’ 256 10.5.4 Type of protection ‘m’ 257 10.5.5 Type of ... 257 10.5.6 Type of protection ‘o’ 258 10.5.7 Type of protection ‘p’ 258 10.5.8 Type of protection ‘q’ 259 10.5.9 Type of protection ‘s’ 259 10.5.10 Type of protection ‘de’ 25...

Ngày tải lên: 18/02/2014, 22:20

... For example, the concept of Social Security number appears twice in the EMPLOYEE relation of Figure 3.5: once in the role of the employee’s SSN, and once in the role of the super- visor’s SSN. ... designate Dno to be a foreign key of EMPLOYEE referencing the DEPARTMENT relation. This means that a value of Dno in any tuple t 1 of the EMPLOYEE relation must match a value of 3.2...

Ngày tải lên: 20/02/2014, 05:21

Ngày tải lên: 22/02/2014, 06:20

... pressure of 50 cm H 2 O, static 4. How to Use Modes - 101 - or plateau pressure of 40 cm H 2 O, mean pressure of 28 cm H 2 O, and PEEP of 10 cm H 2 O. We know that compliance is the ratio of volume ... exponential decay waveform (often mistakenly called a “decelerating” waveform), and it is characteristic of passive emptying of the lungs (exhalation). If the equation of...

Ngày tải lên: 22/02/2014, 09:20

... At the end of this lesson, the student should be able to understand • Elements of force system at a beam section. • Superposition of axial and bending stresses. • Transformation of plane stresses; ... section X-X, Q the first moment of area, I the moment of inertia, t the width at which transverse shear is calculated, J the polar moment of inertia and r the radius of...

Ngày tải lên: 25/12/2013, 23:18

... torque of 5 KN-m. The material has a yield point of 350 MPa. Find the required diameter using (a) Maximum shear stress theory (b) Maximum distortion energy theory Take a factor of safety of 2.5. ... Summary of this Lesson Different types of loading and criterion for design of machine parts subjected to static loading based on different failure theories have been demonstra...

Ngày tải lên: 25/12/2013, 23:18