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May 23, 2012
Public Building Service Preventive Maintenance
Public Building Service Preventive Maintenance
TOC
A-1 Air Dryer, Refrigerated or Regenerative Desiccant Type
A-2 Unitary, Heating and Cooling Unit Application
A-3 Humidification Systems
A-4 Air Compressor
A-5 Air Conditioning Machine; Split System
A-6 Air-Conditioning Machine Package Unit (Comfort Cooling)
A-7 Air-Conditioning Machine, Package Unit (Special Purpose)
A-8 Air-Conditioning, Window Unit
A-9 Air-Cooled Condenser
A-10 Heat Pumps
A-11 Air Handler Unit
A-12 Glycol Dry Cooler
A-13 Air Conditioning Unit, Ceiling/Wall Mounted
A-15 After-Cooler/Separator
B-1 Battery Charger
B-2 Boiler (Coal, Oil, and Gas)
B-3 Burner, Gas
B-4 Burner, Oil
B-5 Boiler, Electric
B-6 Boiler, Instruments/Controls
B-7 Boiler, Internal Inspection and Hydrostatic Test
B-8 Boiler, External Inspection
C-1 Clocks, Central System
C-2 Remote Air Intake Dampers
C-3 Coils Preheat,...
May 21, 2012
HVAC Components and Systems
HVAC Components and Systems
CONTENTS
Introduction
HVAC Components
Background
Source Components
Distribution Components
Delivery Components
HVAC Systems
Local Systems
Central Systems
All-Air Systems
All-Water Systems
Air-Water Systems
Water-Source Heat Pumps
Application Examples
Single-Family Residence
Branch Bank
Church
Government Office Building
Field Exercises
Summary Listing
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Physical Audio Signal Processing
Physical Audio Signal Processing
JULIUS O. SMITH III
CONTENTS
Physical Signal Modeling Intro
But How Does It Sound?
What is a Model?
Overview of Model Types
Signal Models
Physical Models
All We Need is Newton
Formulations
ODEs
PDEs
Difference Equations (Finite Difference Schemes)
State Space Models
Linear State Space Models
Transfer Functions
Modal Representation
Equivalent Circuits
Impedance Networks
Wave Digital Filters
Digital Waveguide Modeling Elements
General Modeling Procedure
Our Plan
Elementary Physical Modeling Problems
Acoustic Modeling with Delay
Delay Lines
A Software Delay Line
Acoustic Wave Propagation Simulation
Traveling Waves
Damped Traveling Waves
Dispersive Traveling Waves
Converting Propagation Distance to Delay Length
Spherical Waves from a Point Source
Reflection of Spherical or Plane Waves
An Acoustic Echo Simulator
Program for Acoustic Echo Simulation
Lossy Acoustic Propagation
Digital Waveguides
Tapped...
May 20, 2012
Industrial Belt and Drive Preventive Maintenance
Industrial Belt and Drive Preventive Maintenance
TOC
I. Introduction
1. Why preventive maintenance?
2. Components of a good maintenance programme
II. A safe working environment
III. Preventive “routine” maintenance
1. Simple drive inspection
2. Frequency of inspection
3. When to perform preventive maintenance
IV. Drive shutdown and thorough inspection
1. Guard inspection
2. Belt inspection
3. Pulley inspection
4. Check alignment tolerances
5. Check other drive components
6. Check belt tension
7. LASER AT-1 laser alignment device
V. Belt and pulley installation
1. V-belt installation
2. Pulley installation and alignment
3. Synchronous belt installation
VI. Belt identification
1. Industrial belt types
2. Cross-sections and nominal dimensions: V-belts
3. Cross-sections and nominal dimensions: synchronous belts
VII. Belt drive performance...
May 18, 2012
Beginning Vibration Analysis with Basic Fundamentals
Beginning Vibration Analysis with Basic Fundamentals
pdf presentation
CONTENTS
Introduction
Mass & Stiffness
FFT, Frequency Spectrum, Power Spectrum
Time Waveform
Scaling X & Y
Double Trouble
Hertz (Hz)
Relationship with Time
Single Frequency
Multiple Frequencies
Frequency Spectrum
Lines of Resolution
Filter Windows
Using Resolution
Data Sampling Time
Engineering Units (EU)
Acceleration - Velocity
Sensors
Accelerometers
Proximity Probes
Data Collection
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May 15, 2012
Wireless Communications: Signal Processing Perspectives
Wireless Communications: Signal Processing Perspectives
H. V. Poor and G. W. Wornell, eds.
CONTENTS :
1 : Linear Diversity Techniques for Fading Channels
2 : Adaptive Interference Suppression
3 : Equalization of Multiuser Channels
4 : Blind Space-Time Signal Processing
5 : Network Capacity, Power Control, and Effective Bandwidth
6 : Architectural Principles for Multimedia Networks
7 : Multiresolution Joint Source-Channel Coding
8 : Underwater Acoustic Communications
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May 13, 2012
Steam Turbine-Generator Torsional Vibration Interaction with the Electrical Network
Steam Turbine-Generator Torsional Vibration Interaction with the Electrical Network
TOC
1 TORSION OF SHAFTS
Introduction
Torsion and Definitions
Torsional Stresses in a Shaft of Annular Cross Section
Strain
Torsion of Non-Annular Shaft Segments
Shaft Fatigue Cracks Directions in Uniform Shafts due to Torsion
2 TORSIONAL NATURAL FREQUENCIES AND MODE SHAPES
Introduction
Torsional Natural Frequencies and Mode Shapes
Torsional Natural Frequencies
Torsional Mode Shapes of a Simple System
Subsynchronous Torsional Modes of a Turbine-Generator
Supersynchronous Torsional Modes of a Turbine-Generator
3 TORSIONAL FATIGUE
Introduction
Fatigue Characteristics
Fretting Fatigue
4 STEAM TURBINE-GENERATOR TORSIONAL VIBRATION CHARACTERISTICS
Scope and Introduction
Machine Construction
General
Couplings
Four Pole LP Turbine Rotors and Blades
Retaining Rings
Torsional Damping
Shaft Transient Torque Characteristics
Steam Turbine-Generator Sinusoidal Steady-State Response
5 TORSIONAL EVENTS EXPERIENCED BY A TURBINE- GENERATOR
Introduction
Disturbances from the...
May 12, 2012
Computers, Programs and C++ Lecture Notes
Computers, Programs and C++ - Lecture Notes
CONTENTS
Introduction to Computers, Programs and C++
Primitive Data Types and Operations
Selection Statements
Loops
Functions
Arrays
Pointers and C-Strings
Mid-term exam
Recursion
Objects and Classes
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May 11, 2012
Efficient Algorithm for MPEG Compression
Efficient Algorithm for MPEG Compression
TOC
1 Preliminaries
1.1 Digital Video Representation
1.1.1 Color Representation
1.1.2 Digitization
1.1.3 Spatial Sampling
1.1.4 Temporal Sampling
1.1.5 Quantization
1.1.6 Standard Video Data Formats
1.2 A Case for Video Compression
1.3 Spatial Redundancy
1.3.1 Vector Quantization
1.3.2 Block Transform
1.3.3 Discrete Cosine Transform
1.4 Temporal Redundancy
1.4.1 Frame Di erencing
1.4.2 Motion Compensation
1.4.3 Block Matching
1.5 H.261 Standard
1.5.1 Features
1.5.2 Encoder Block Diagram
1.5.3 Hypothetical Reference Decoder
1.5.4 Heuristics for Coding Control
1.5.5 Rate Control
1.6 MPEG-1 and MPEG-2 Standards
1.6.1 Features
1.6.2 Encoder Block Diagram
1.6.3 Layers
1.6.4 Video Bu ering Veri er
1.6.5 Rate Control
1.7 H.263 Standard
1.7.1 Features
1.7.2 Hypothetical Reference Decoder
1.8 Lossy Coding and Rate-Distortion
1.8.1 Classical Rate-Distortion Theory
1.8.2 Operational Rate-Distortion
1.8.3 Budget-Constrained Bit Allocation
1.8.4 Viterbi Algorithm
1.8.5 Lagrange Optimization
2 Lexicographic Bit Allocation Framework
2.1 Perceptual and...
May 10, 2012
Foundation Settlement Analysis
Foundation Settlement Analysis
TOC
1. INtroduction
2. Analysis and Design Methods
2.2 Desirable Attributes of Practical Analysis and Design Methods
2.3 Categories of Analysis and Design Methods
3. Settlement Analysis of Shallow Foundations on Clay
3.1 One-Dimensional versus Three-Dimensional Settlement Analysis
3.2 Effects of Local Yields
3.3 Case Study
3.4 Rate of Settlement
3.5 Creep and Secondary Consolidation
4. Settlement of Shallow Foundations on Sand
4.1 Previous Studies
4.2 Case Study
5. Analysis of Raft and Strip Foundations
5.1 Introduction
5.2 Subgrade Reaction versus Elastic Continuum Soil Models
5.3 The Analysis of a Raft as a Series of Strip Footings
5.4 The Effects of Structure-Foundation-Soil Interaction
6. Settlement of Pile Groups
7. The Pivotal Role...
May 9, 2012
Cost-Effective Manufacturing : Copper Alloy Bearings
Cost-Effective Manufacturing : Copper Alloy Bearings
TOC
1. Introduction
2. Tribological Characteristics of Bearing Materials
General requirements and structure of bearing materials
Copper alloys as bearing materials
3. Classification of Copper Alloy Bearing Materials
(i)Tin bronze
(ii) Phosphor bronze
(iii) Leaded bronze
(iv) Copper-lead
(v) Aluminium bronze
(vi) Gunmetal
(vii) Brass
(viii) Copper-beryllium
4. Classes of Bearings
(i) Externally lubricated bearings
(ii) Oil impregnated porous bearings
(iii) Bearings with built-in solid lubrication
(iv) Rolling element bearings
5. Externally Lubricated Bearings
Lubrication regimes
(i) Hydrodynamic lubrication
(ii) Boundary lubrication
(iii) Hydrostatic lubrication
Copper alloy materials for externally lubricated bearings
Bearing design guidance
(i) Steadily loaded hydrodynamic bearings
Grooved and lubricant feed arrangements
Effect of variations in the design parameters
Design hints
Sources of further information
(ii) Boundary lubricated bearings
Design hints
Sources of further information
(iii)...
May 8, 2012
Energy Simulation in Building Design
Energy Simulation in Building Design - Ppt Lecture Notes
CONTENTS :
Course introduction and terminology
Heat transfer review
Solar radiation
Thermal processes in building elements
Thermal processes in indoor environment
Modeling, Introduction to MathCAD
System of equations, Introduction to eQUEST
Unsteady-state heat transfer
Numerical methods for solving system of equations
System of equations for the wall, zone, building
Linearization of building energy equations
Modeling
HVAC systems
Modeling of HVAC systems
HVAC and eQUEST software
Same notes like for the previous class
Building simulation software
Review for the Midterm Test
Review and available ES software
Final project assignment
Differences between ES software
Interaction of building envelope and HVAC system
Building simulation and...
Combinatorial Algorithms
Combinatorial Algorithms
TOC
1 Introduction
Aims
Highlights
Categories of Usage (Part I)
Structure of the Chapters
The Specifications List
Structure of the "Next" Programs
Structure of the -Random" Programs
Arrays and Specifications
PART 1 COMBINATORIAL FAMILIES
1 Next Subset of an n-Set (NEXSUB/LEXSUB)
(A) The Direct Approach
(B) The Gray Code
Algorithm NEXSUB
(C) Lexicographic Sequencing
Algorithm LEXSUB
Subroutine Specifications (NEXSUB)
Subroutine Specifications (LEXSUB)
Sample Output (NEXSUB)
Sample Output (LEXSUB)
2 Random Subset of an n-Set (RANSUB)
Algorithm RANSUB
3 Next k-Subset of an n-Set (NEXKSB/NXKSRD)
Algorithm NEXKSB (Lexicographic)
Flow Chart NXKSRD
Subroutine Specifications (NEXKSB)
Subroutine Specifications (NXKSRD)
Sample Output (NEXKSB)
Sample Output (NXKSRD)
4 Random k-Subset of an n-Set (RANKSB)
Algorithm RANKSB
Algorithm RKS2
5 Next Composition of n into k Parts (NEXCOM)
Algorithm NEXCOM
6 Random Composition of n into k Parts (RANCOM)
Algorithm RANCOM
7...
May 7, 2012
Breaker Monitoring with Numeric Relays
Breaker Monitoring with Numeric Relays
CONTENTS
Circuit Breaker Designs and Circuit Breaker Wear
- Oil Circuit Breakers
- Air Break Circuit Breakers
- Air Blast Breakers
- Vacuum Breakers
- SF6 Breakers
Concept of Contact Wear: Energy in Breaker Arc
Changing RARC During Fault
Arcing Time vs. Circuit Breaker Mechanism Travel and 52a/b Contact
Circuit Breaker Mechanism Speed Variations
Power Factor Effects on Contact Wear
DC Offset Effects on Breaker Wear
Effects of Multiple Series Breaks
Fast Reclosing Effects on Breaker Wear
Circuit Breaker Duty Monitoring Capabilities of Numeric Relays
Other Breaker Monitoring Functions in Numeric Relays
Relay Recording Capabilities
Conclusion
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May 5, 2012
Premixed Hydrocarbon Stagnation Flames : Experiments and Simulations to Validate Combustion Chemical-Kinetic Models
Premixed Hydrocarbon Stagnation Flames : Experiments and Simulations to Validate Combustion Chemical-Kinetic Models
TOC
1 Introduction
2 Chemical-kinetic models
2.1 List of chemical-kinetic models
2.2 Continuation technique between chemical-kinetic models
3 Non-reacting impinging jets
4 Numerical method
4.1 Stagnation-flame simulations
4.2 Particle-tracking corrections
5 Premixed laminar C3H8- and C3H6-air stagnation flames: experiments and simulations with detailed kinetic models
5.1 Introduction
5.2 Experimental method
5.3 Results and discussion
6 Validation of chemical-kinetic models against CH4-, C2H6-, and C2H4-air stagnationflame experiments and comparative sensitivity analysis
6.1 Validation of C1–C3 kinetic mechanisms against CH4-, C2H6-, and C2H4-air stagnationflame experiments at variable stoichiometry
6.1.1 Flame position: a good surrogate for flame speed in stagnation-flow-stabilized flames
6.1.2 Comparison of predicted flame positions...
