Introduction and Overview | p. 1 |
Why Networks? | p. 1 |
Examples of Networks | p. 3 |
Technological Networks | p. 3 |
Social Networks | p. 5 |
Biological Networks | p. 7 |
Information Networks | p. 9 |
About this Book | p. 11 |
Preliminaries | p. 15 |
Background on Graphs | p. 15 |
Basic Definitions and Concepts | p. 16 |
Families of Graphs | p. 18 |
Graphs and Matrix Algebra | p. 20 |
Graph Data Structures and Algorithms | p. 21 |
Background in Probability and Statistics | p. 24 |
Probability | p. 25 |
Principles of Statistical Inference | p. 31 |
Methods of Statistical Inference: Tutorials | p. 32 |
Statistical Analysis of Network Data: Prelude | p. 42 |
Additional Related Topics and Reading | p. 45 |
Exercises | p. 45 |
Mapping Networks | p. 49 |
Introduction | p. 49 |
Collecting Relational Network Data | p. 50 |
Measurement of System Elements and Interactions | p. 51 |
Enumerated, Partial, and Sampled Data | p. 54 |
Constructing Network Graph Representations | p. 56 |
Visualizing Network Graphs | p. 58 |
Elements of Graph Visualization | p. 58 |
Methods of Graph Visualization | p. 60 |
Case Studies | p. 63 |
Mapping 'Science' | p. 65 |
Mapping the Internet | p. 68 |
Mapping Dynamic Networks | p. 74 |
Additional Related Topics and Reading | p. 76 |
Exercises | p. 77 |
Descriptive Analysis of Network Graph Characteristics | p. 79 |
Introduction | p. 79 |
Vertex and Edge Characteristics | p. 80 |
Degree | p. 80 |
Centrality | p. 80 |
Characterizing Network Cohesion | p. 94 |
Local Density | p. 94 |
Connectivity | p. 97 |
Graph Partitioning | p. 102 |
Assortativity and Mixing | p. 111 |
Case Study: Analysis of an Epileptic Seizure | p. 114 |
Characterizing Dynamic Network Graphs | p. 116 |
Additional Related Topics and Reading | p. 119 |
Exercise | p. 120 |
Sampling and Estimation in Network Graphs | p. 123 |
Introduction | p. 123 |
Background on Statistical Sampling Theory | p. 126 |
Horvitz-Thompson Estimation for Totals | p. 126 |
Estimation of Group Size | p. 129 |
Common Network Graph Sampling Designs | p. 131 |
Induced and Incident Subgraph Sampling | p. 131 |
Star and Snowball Sampling | p. 133 |
Link Tracing | p. 136 |
Estimation of Totals in Network Graphs | p. 137 |
Vertex Totals | p. 137 |
Totals on Vertex Pairs | p. 138 |
Totals of Higher Order | p. 141 |
Effects of Design, Measurement, and Total | p. 143 |
Estimation of Network Group Size | p. 145 |
Other Network Graph Estimation Problems | p. 149 |
Additional Related Topics and Reading | p. 151 |
Exercises | p. 151 |
Models for Network Graphs | p. 153 |
Introduction | p. 153 |
Random Graph Models | p. 154 |
Classical Random Graph Models | p. 156 |
Generalized Random Graph Models | p. 158 |
Simulating Random Graph Models | p. 159 |
Statistical Application of Random Graph Models | p. 162 |
Small-World Models | p. 169 |
The Watts-Strogatz Model | p. 169 |
Other Small-World Network Models | p. 171 |
Network Growth Models | p. 172 |
Preferential Attachment Models | p. 173 |
Copying Models | p. 176 |
Fitting Network Growth Models | p. 178 |
Exponential Random Graph Models | p. 180 |
Model Specification | p. 180 |
Fitting Exponential Random Graph Models | p. 185 |
Goodness-of-Fit and Model Degeneracy | p. 187 |
Case Study: Modeling Collaboration Among Lawyers | p. 188 |
Challenges in Modeling Network Graphs | p. 191 |
Additional Related Topics and Reading | p. 193 |
Exercises | p. 195 |
Network Topology Inference | p. 197 |
Introduction | p. 197 |
Link Prediction | p. 199 |
Informal Scoring Methods | p. 201 |
Probabilistic Classification Methods | p. 202 |
Case Study: Predicting Lawyer Collaboration | p. 205 |
Inference of Association Networks | p. 207 |
Correlation Networks | p. 209 |
Partial Correlation Networks | p. 212 |
Gaussian Graphical Model Networks | p. 216 |
Case Study: Inferring Genetic Regulatory Interactions | p. 220 |
Tomographic Network Topology Inference | p. 223 |
Tomographic Inference of Tree Topologies | p. 225 |
Methods Based on Hierarchical Clustering | p. 228 |
Likelihood-based Methods | p. 231 |
Summarizing Collections of Trees | p. 234 |
Case Study: Computer Network Topology Identification | p. 236 |
Additional Related Topics and Reading | p. 241 |
Exercises | p. 242 |
Modeling and Prediction for Processes on Network Graphs | p. 245 |
Introduction | p. 245 |
Nearest Neighbor Prediction | p. 246 |
Markov Random Fields | p. 249 |
Markov Random Field Models | p. 249 |
Inference and Prediction for Markov Random Fields | p. 252 |
Related Probabilistic Models | p. 256 |
Kernel-based Regression | p. 257 |
Kernel Regression on Graphs | p. 258 |
Designing Kernels on Graphs | p. 262 |
Case Study: Predicting Protein Function | p. 266 |
Modeling and Prediction for Dynamic Processes | p. 271 |
Epidemic Processes: An Illustration | p. 272 |
Other Dynamic Processes | p. 280 |
Additional Related Topics and Reading | p. 281 |
Exercises | p. 282 |
Analysis of Network Flow Data | p. 285 |
Introduction | p. 285 |
Gravity Models | p. 287 |
Model Specification | p. 288 |
Inference for Gravity Models | p. 292 |
Traffic Matrix Estimation | p. 297 |
Static Methods | p. 298 |
Dynamic Methods | p. 306 |
Case Study: Internet Traffic Matrix Estimation | p. 310 |
Estimation of Network Flow Costs | p. 316 |
Link Costs from End-to-end Measurements | p. 317 |
Path Costs from End-to-end Measurements | p. 321 |
Additional Related Topics and Reading | p. 328 |
Exercises | p. 330 |
Graphical Models | p. 333 |
Introduction | p. 333 |
Defining Graphical Models | p. 334 |
Directed Graphical Models | p. 335 |
Undirected Graphical Models | p. 339 |
Inference for Graphical Models | p. 342 |
Additional Related Topics and Reading | p. 344 |
Glossary of Notation | p. 345 |
References | p. 347 |
Author Index | p. 373 |
Subject Index | p. 381 |
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