README.md

metadata

license: mit
language:
  - en
pretty_name: Walnut Storage Timeseries (Indian Conditions)
size_categories:
  - 1M<n<10M
task_categories:
  - time-series-forecasting
tags:
  - food-science
  - walnut
  - rancidity
  - oxidation
  - arrhenius
  - storage
  - india
  - synthetic
  - shelf-life
dataset_info:
  features:
    - name: sequence_id
      dtype: int32
    - name: day
      dtype: int16
    - name: temperature
      dtype: float32
    - name: humidity
      dtype: float32
    - name: moisture
      dtype: float32
    - name: oxygen
      dtype: float32
    - name: peroxide_value
      dtype: float32
    - name: free_fatty_acids
      dtype: float32
    - name: hexanal_level
      dtype: float32
    - name: oxidation_index
      dtype: float32
    - name: rancidity_probability
      dtype: float32
    - name: shelf_life_remaining_days
      dtype: float32
    - name: decay_curve_value
      dtype: float32
  splits:
    - name: train
      num_examples: 5392174
  num_rows: 5392174

Walnut Storage Timeseries Dataset (Indian Conditions)

Synthetic time-series dataset for training walnut rancidity prediction models. Generated using Arrhenius-based lipid oxidation kinetics simulating real Indian storage scenarios.

Dataset Details

Property	Value
Total rows	5,392,174
Total sequences	90,000
Sequence length	30–90 days
Storage duration	0–180 days
Generation method	Arrhenius kinetics + noise

Storage Scenarios

Scenario	Temperature	Humidity	Weight
Cold storage warehouse	2–8 °C	40–60 %	20 %
Hill region (Kashmir / Himachal Pradesh)	5–20 °C	35–65 %	25 %
Ambient warehouse	18–32 °C	50–75 %	30 %
Hot transport (Indian summer)	28–40 °C	55–85 %	25 %

Chemistry Model

Oxidation simulated via Arrhenius kinetics:

k  = A · exp(-Ea / (R · T))       A=1.5e12, Ea=80000 J/mol, R=8.314
PV(t) = PV₀ · exp(k · t)

Rancidity threshold: PV > 5 meq/kg

Columns

Column	Unit	Description
sequence_id	—	Unique storage sequence identifier
day	days	Storage day index
temperature	°C	Daily ambient temperature
humidity	% RH	Relative humidity
moisture	%	Walnut moisture content
oxygen	fraction	Oxygen level (0.18–0.23)
peroxide_value	meq/kg	Primary oxidation marker
free_fatty_acids	%	FFA content
hexanal_level	ppm	Volatile oxidation byproduct
oxidation_index	—	Composite oxidation score
rancidity_probability	[0,1]	sigmoid(PV − 5)
shelf_life_remaining_days	days	Days until PV exceeds 5 meq/kg
decay_curve_value	[0,1]	Normalised PV (PV/10, capped at 1)

Associated Model

Trained model: Arko007/walnut-rancidity-predictor

License

MIT