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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,...

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May 21, 2012

HVAC Components and Systems

by @ 10:28 pm. Filed under Mechanical engineering
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 Download    :    Read More »

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...

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May 20, 2012

Industrial Belt and Drive Preventive Maintenance

by @ 5:06 pm. Filed under Mechanical engineering
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...

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May 18, 2012

Beginning Vibration Analysis with Basic Fundamentals

by @ 4:18 pm. Filed under Mechanical engineering, physics
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 Download    :   Read More »

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 Download   :   Read More »

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...

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May 12, 2012

Computers, Programs and C++ Lecture Notes

by @ 9:17 am. Filed under Computer/IT
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 Download   :   Read More »

May 11, 2012

Efficient Algorithm for MPEG Compression

by @ 5:30 pm. Filed under Computer/IT
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...

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May 10, 2012

Foundation Settlement Analysis

by @ 5:23 pm. Filed under civil engineering
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...

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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)...

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May 8, 2012

Energy Simulation in Building Design

by @ 7:06 pm. Filed under civil engineering, Mechanical engineering
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...

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Combinatorial Algorithms

by @ 5:25 pm. Filed under Computer/IT
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...

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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 Download    :    Read More »

May 5, 2012

Premixed Hydrocarbon Stagnation Flames : Experiments and Simulations to Validate Combustion Chemical-Kinetic Models

by @ 11:23 am. Filed under Chemistry
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...

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