root
76278f5fe1
backend/routers/analyze.py imports services.* (root package), not backend.services.* - so the earlier A1/A2/A3 edits landed in an unused duplicate. Also COPY/mount services/ so the container can start at all (ModuleNotFoundError: No module named services).
323 lines
8.3 KiB
Python
323 lines
8.3 KiB
Python
"""
|
|
Distance calculation service based on search and rescue statistics.
|
|
|
|
Implements distance formulas and prior probabilities based on:
|
|
- PSO EXTREMUM data (400 cases, 2015)
|
|
- Age-based movement speeds
|
|
- Terrain and weather modifiers
|
|
"""
|
|
from typing import Dict
|
|
|
|
|
|
def calculate_max_distance(case_data: dict) -> float:
|
|
"""
|
|
Calculate maximum probable distance using the formula:
|
|
Distance = Time × НормС × СП × СКД × СУ × СУТ × ВВС × ВП
|
|
|
|
Where:
|
|
- Time: elapsed time in hours
|
|
- НормС: base speed by age (km/h)
|
|
- СП: terrain coefficient
|
|
- СКД: coefficient for diagnosis (not implemented yet)
|
|
- СУ: coefficient for urgency (not implemented yet)
|
|
- СУТ: fatigue coefficient (5% reduction per hour)
|
|
- ВВС: time of day coefficient
|
|
- ВП: weather coefficient
|
|
|
|
Args:
|
|
case_data: Dictionary with case information
|
|
- age: age in years
|
|
- elapsed_hours: time elapsed since last seen
|
|
- terrain_primary: terrain type
|
|
- time_of_day: time of day (день/ночь/сумерки)
|
|
- weather: weather conditions
|
|
|
|
Returns:
|
|
Maximum probable distance in kilometers
|
|
"""
|
|
# Extract data
|
|
age = case_data.get('age', 10)
|
|
elapsed_hours = case_data.get('elapsed_hours', 1.0)
|
|
terrain = case_data.get('terrain_primary', 'лес')
|
|
time_of_day = case_data.get('time_of_day', 'день')
|
|
weather = case_data.get('weather', 'нет')
|
|
|
|
# НормС - Base speed by age (km/h)
|
|
base_speed = get_base_speed(age)
|
|
|
|
# СП - Terrain coefficient
|
|
terrain_coef = get_terrain_coefficient(terrain)
|
|
|
|
# СКД - Diagnosis coefficient (placeholder, can be expanded)
|
|
diagnosis_coef = 1.0
|
|
|
|
# СУ - Urgency coefficient (placeholder, can be expanded)
|
|
urgency_coef = 1.0
|
|
|
|
# СУТ - Fatigue coefficient (5% reduction per hour)
|
|
fatigue_coef = max(0.3, 1.0 - (0.05 * elapsed_hours))
|
|
|
|
# ВВС - Time of day coefficient
|
|
time_coef = get_time_of_day_coefficient(time_of_day)
|
|
|
|
# ВП - Weather coefficient
|
|
weather_coef = get_weather_coefficient(weather)
|
|
|
|
# Calculate distance
|
|
distance = (
|
|
elapsed_hours *
|
|
base_speed *
|
|
terrain_coef *
|
|
diagnosis_coef *
|
|
urgency_coef *
|
|
fatigue_coef *
|
|
time_coef *
|
|
weather_coef
|
|
)
|
|
|
|
return round(distance, 2)
|
|
|
|
|
|
def get_base_speed(age: int) -> float:
|
|
"""
|
|
Get base movement speed by age (НормС).
|
|
|
|
Args:
|
|
age: Age in years
|
|
|
|
Returns:
|
|
Base speed in km/h
|
|
"""
|
|
# Скорость смещения потерявшегося ребёнка (не скорость ходьбы)
|
|
# ПСО ЭКСТРЕМУМ: 94% найдены в пределах 3 км
|
|
if age <= 2:
|
|
return 1.0
|
|
elif age <= 5:
|
|
return 2.0
|
|
elif age <= 8:
|
|
return 3.0
|
|
elif age <= 12:
|
|
return 4.0
|
|
elif age <= 15:
|
|
return 5.0
|
|
elif age <= 17:
|
|
return 5.5
|
|
elif age <= 64:
|
|
return 5.0
|
|
else: # 65+
|
|
return 3.0
|
|
|
|
|
|
def get_terrain_coefficient(terrain: str) -> float:
|
|
"""
|
|
Get terrain movement coefficient (СП).
|
|
|
|
Args:
|
|
terrain: Terrain type
|
|
|
|
Returns:
|
|
Terrain coefficient (0.0 - 1.0)
|
|
"""
|
|
if not terrain:
|
|
return 0.5
|
|
terrain_lower = terrain.lower()
|
|
|
|
terrain_map = {
|
|
'лесная дорога': 0.8,
|
|
'сложный лес': 0.25,
|
|
'густой лес': 0.25,
|
|
'простой лес': 0.5,
|
|
'лес': 0.5,
|
|
'дорога': 0.8,
|
|
'тропа': 0.8,
|
|
'болото': 0.2,
|
|
'поле': 0.9,
|
|
'луг': 0.9,
|
|
'город': 1.0,
|
|
'населённый пункт': 1.0,
|
|
'горы': 0.3,
|
|
'овраг': 0.3
|
|
}
|
|
|
|
for key, value in terrain_map.items():
|
|
if key in terrain_lower:
|
|
return value
|
|
|
|
# Default for unknown terrain
|
|
return 0.5
|
|
|
|
|
|
def get_time_of_day_coefficient(time_of_day: str) -> float:
|
|
"""
|
|
Get time of day movement coefficient (ВВС).
|
|
|
|
Args:
|
|
time_of_day: Time of day
|
|
|
|
Returns:
|
|
Time coefficient (0.0 - 1.0)
|
|
"""
|
|
if not time_of_day:
|
|
return 1.0
|
|
time_lower = time_of_day.lower()
|
|
|
|
if 'ночь' in time_lower:
|
|
return 0.5
|
|
elif 'сумерки' in time_lower or 'вечер' in time_lower:
|
|
return 0.5
|
|
else: # день
|
|
return 1.0
|
|
|
|
|
|
def get_weather_coefficient(weather: str) -> float:
|
|
"""
|
|
Get weather movement coefficient (ВП).
|
|
|
|
Args:
|
|
weather: Weather conditions
|
|
|
|
Returns:
|
|
Weather coefficient (0.0 - 1.0)
|
|
"""
|
|
if not weather:
|
|
return 1.0
|
|
weather_lower = weather.lower()
|
|
|
|
if 'ливень' in weather_lower or 'сильный дождь' in weather_lower:
|
|
return 0.6
|
|
elif 'дождь' in weather_lower:
|
|
return 0.8
|
|
elif 'туман' in weather_lower:
|
|
return 0.7
|
|
elif 'снег' in weather_lower or 'метель' in weather_lower:
|
|
return 0.6
|
|
elif 'жара' in weather_lower:
|
|
return 0.8
|
|
else: # нет / ясно
|
|
return 1.0
|
|
|
|
|
|
def get_distance_priors(age_years: int) -> Dict[str, float]:
|
|
"""
|
|
Get prior probabilities for distance zones based on age.
|
|
|
|
Based on PSO EXTREMUM data (400 cases, 2015).
|
|
|
|
Args:
|
|
age_years: Age in years
|
|
|
|
Returns:
|
|
Dictionary with distance zone probabilities
|
|
"""
|
|
if age_years < 8:
|
|
# До 8 лет - дети младшего возраста
|
|
return {
|
|
'0_500m': 0.45,
|
|
'500_1500m': 0.35,
|
|
'1500_2500m': 0.15,
|
|
'2500_3500m': 0.04,
|
|
'3500_plus': 0.01
|
|
}
|
|
elif age_years <= 12:
|
|
# 8-12 лет - дети среднего возраста
|
|
return {
|
|
'0_500m': 0.28,
|
|
'500_1500m': 0.25,
|
|
'1500_2500m': 0.22,
|
|
'2500_3500m': 0.19,
|
|
'3500_5000m': 0.03,
|
|
'5000_plus': 0.03
|
|
}
|
|
elif age_years <= 17:
|
|
# 13-17 лет - подростки
|
|
return {
|
|
'0_500m': 0.15,
|
|
'500_1500m': 0.20,
|
|
'1500_2500m': 0.25,
|
|
'2500_3500m': 0.20,
|
|
'3500_5000m': 0.12,
|
|
'5000_plus': 0.08
|
|
}
|
|
elif age_years <= 64:
|
|
# 18-64 года - взрослые
|
|
return {
|
|
'0_500m': 0.12,
|
|
'500_1500m': 0.18,
|
|
'1500_2500m': 0.22,
|
|
'2500_3500m': 0.20,
|
|
'3500_5000m': 0.15,
|
|
'5000_plus': 0.13
|
|
}
|
|
else:
|
|
# 65+ лет - пожилые
|
|
return {
|
|
'0_500m': 0.35,
|
|
'500_1500m': 0.30,
|
|
'1500_2500m': 0.20,
|
|
'2500_3500m': 0.10,
|
|
'3500_5000m': 0.03,
|
|
'5000_plus': 0.02
|
|
}
|
|
|
|
|
|
def get_distance_zone(distance_km: float) -> str:
|
|
"""
|
|
Get distance zone name for a given distance.
|
|
|
|
Args:
|
|
distance_km: Distance in kilometers
|
|
|
|
Returns:
|
|
Zone name
|
|
"""
|
|
if distance_km < 0.5:
|
|
return '0_500m'
|
|
elif distance_km < 1.5:
|
|
return '500_1500m'
|
|
elif distance_km < 2.5:
|
|
return '1500_2500m'
|
|
elif distance_km < 3.5:
|
|
return '2500_3500m'
|
|
elif distance_km < 5.0:
|
|
return '3500_5000m'
|
|
else:
|
|
return '5000_plus'
|
|
|
|
|
|
def get_distance_statistics(age_years: int, elapsed_hours: float, terrain: str) -> Dict:
|
|
"""
|
|
Get comprehensive distance statistics for a case.
|
|
|
|
Args:
|
|
age_years: Age in years
|
|
elapsed_hours: Time elapsed since last seen
|
|
terrain: Terrain type
|
|
|
|
Returns:
|
|
Dictionary with distance statistics
|
|
"""
|
|
# Calculate max distance
|
|
case_data = {
|
|
'age': age_years,
|
|
'elapsed_hours': elapsed_hours,
|
|
'terrain_primary': terrain,
|
|
'time_of_day': 'день',
|
|
'weather': 'нет'
|
|
}
|
|
max_distance = calculate_max_distance(case_data)
|
|
|
|
# Get priors
|
|
priors = get_distance_priors(age_years)
|
|
|
|
# Get current zone
|
|
current_zone = get_distance_zone(max_distance)
|
|
|
|
return {
|
|
'max_distance_km': max_distance,
|
|
'current_zone': current_zone,
|
|
'zone_probability': priors.get(current_zone, 0.0),
|
|
'all_priors': priors,
|
|
'base_speed_kmh': get_base_speed(age_years),
|
|
'terrain_coefficient': get_terrain_coefficient(terrain)
|
|
}
|