Hidden Markov Model
Last edited: August 8, 2025- draw an initial state \(q_1\) from the initial state distribution \(\pi\)
- For each state \(q_{i}\)…
- Drew observe something \(o_{t}\) according to the action distribution of state \(q_{i}\)
- Use transition probability \(a_{i,j}\) to draw a next state \(q_{j}\)
Isolated recognition: train a family of HMMs, one for each word or something. Then, given new data, perform scoring of the HMM onto the features.
components of HMMs
scoring
Given an observation \(o_1, …, o_{T}\) and a model, we compute $P(O | λ)$—the probability of a sequence given a model \(\lambda\)
Hierarchical Multi-Label Clsf. for Vaccine
Last edited: August 8, 2025Misinformation can decline people’s intent to vaccinate.
Data
VaxConcerns Taxonomy: sorting misinformation into a taxonomy which has multiple, hierarchical labels
So, you can classify a label in a bunch of places.
Approaches
Ask an LLM to do one of the following…
One-Shot, Multi-Label
Ignore hierchy, just go do multi label system
multi-pass, hierarchical label
try to predict groups at a time, each pass has a label group as input and needs to produce whether the label is given + sublabels
high chemical activity
Last edited: August 8, 2025a monomer is named active if it recruits its neighbors to make a polymer that can act as an enzyme to catalyze other monomers to become active as well
Hindsight Optimization
Last edited: August 8, 2025If we are tele-operating a robot, we ideally want to minimize cost. We want to estimate a user’s goal via user inputs. Predict the most likely goal + assist for it.
“find a cost function for which user input \(u\) is optimal”.
- system does not know the goal
- the user may not change their goal on a whim
Hindsight Optimization
To solve this, we use QMDP: “select the most optimal actions to estimating cost-to-go assuming full observability”.
history and impact of decision making
Last edited: August 8, 2025history
economics
- utility theory —
psychology
- Pavlov’s salivating togs: biological reinforcement learning
- Alan Turing thought about this regarding
neuroscience
- bio-simulated things
computer science
- how “systems composed of matter can have properties of the mind
engineering
- control theory
maffs
operations research
- WWII logistics optimization
- allocating decisions, etc.
- simplex algorithm
societal impact
- classes can help amplify intention (whether good or evil)
- data-driven methods
