High-rate phase association with travel time neural fields.
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The authors' code
Python · 299 lines · 12 KB · MIT
- from torch.utils.data import Dataset, DataLoader
- import numpy as np
- from tqdm import tqdm
- import skfmm
- from obspy import UTCDateTime as UT
- import pandas as pd
- import multiprocessing
- class WaveSpeedDataset(Dataset):
- def __init__(self, V_trains, p_train):
- self.data_wavespeed=np.array(V_trains,dtype=np.float32)
- self.n_wavespeed=len(V_trains)
- self.p_train=np.array(p_train)
- def __len__(self):
- return self.n_wavespeed
- def __getitem__(self, idx):
- image = {'image':self.data_wavespeed[idx],'p': self.p_train}
- return image
- def get_traveling_time_multi(V_list,station_df,config,dx=25,align_station=False):
- station_df=station_df.copy()
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- xx = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- yy = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- zz = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- X, Y, Z = np.meshgrid(xx,yy,zz)
- X=X.transpose(1,0,2)
- Y=Y.transpose(1,0,2)
- Z=Z.transpose(1,0,2)
- if align_station:
- station_df['x(km)'] = station_df['x(km)'].apply(lambda x: xx[np.argmin(np.abs(np.array(xx) - x))])
- station_df['y(km)'] = station_df['y(km)'].apply(lambda x: yy[np.argmin(np.abs(np.array(yy) - x))])
- station_df['z(km)'] = station_df['z(km)'].apply(lambda x: zz[np.argmin(np.abs(np.array(zz) - x))])
- station_locs=np.array([station_df['x(km)'],station_df['y(km)'],station_df['z(km)']]).T
- loc_src_x=station_locs[:,0]
- loc_src_y=station_locs[:,1]
- loc_src_z=station_locs[:,2]
- n_station=len(loc_src_x)
- n_wavespeed=len(V_list)
- travel_time = np.zeros((n_wavespeed,n_station,grid_size_x,grid_size_y,grid_size_z))
- for j in tqdm(range(n_wavespeed)):
- V=V_list[j]
- #V=np.ones_like(X)
- for i in range(n_station):
- phi = ((X-loc_src_x[i])**2+(Y-loc_src_y[i])**2+(Z-loc_src_z[i])**2)
- #print(np.min(phi))
- #phi=phi-np.min(phi)
- phi=phi-0.001
- try:
- tt= skfmm.travel_time(phi,V,order=2,dx=dx)
- except:
- tt = skfmm.travel_time(phi,V,order=1,dx=dx)
- travel_time[j,i,:,:,:]=tt
- return travel_time
- def compute_task(inputs):
- phi,V,dx=inputs
- result = skfmm.travel_time(phi,V,order=2,dx=dx).astype(dtype=np.float16)
- return result
- def get_traveling_time_multi_mp(V_list,station_df,config,dx=25,align_station=False):
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- xx = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- yy = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- zz = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- X, Y, Z = np.meshgrid(xx,yy,zz)
- X=X.transpose(1,0,2)
- Y=Y.transpose(1,0,2)
- Z=Z.transpose(1,0,2)
- if align_station:
- station_df['x(km)'] = station_df['x(km)'].apply(lambda x: xx[np.argmin(np.abs(np.array(xx) - x))])
- station_df['y(km)'] = station_df['y(km)'].apply(lambda x: yy[np.argmin(np.abs(np.array(yy) - x))])
- station_df['z(km)'] = station_df['z(km)'].apply(lambda x: zz[np.argmin(np.abs(np.array(zz) - x))])
- station_locs=np.array([station_df['x(km)'],station_df['y(km)'],station_df['z(km)']]).T
- loc_src_x=station_locs[:,0]
- loc_src_y=station_locs[:,1]
- loc_src_z=station_locs[:,2]
- n_station=len(loc_src_x)
- n_wavespeed=len(V_list)
- data_list=[]
- for j in tqdm(range(n_wavespeed)):
- V=V_list[j]
- #V=np.ones_like(X)
- for i in range(n_station):
- phi = ((X-loc_src_x[i])**2+(Y-loc_src_y[i])**2+(Z-loc_src_z[i])**2)
- #print(np.min(phi))
- #phi=phi-np.min(phi)
- phi=phi-0.001
- # try:
- # tt= skfmm.travel_time(phi,V,order=2,dx=dx)
- # except:
- # tt = skfmm.travel_time(phi,V,order=1,dx=dx)
- data_list.append((phi,V,dx))
- pool = multiprocessing.Pool()
- result_iter = pool.imap(compute_task, data_list)
- result_list = []
- for result in tqdm(result_iter, total=n_wavespeed*n_station):
- result_list.append(result)
- pool.close()
- pool.join()
- result_list=np.array(result_list).astype(np.float16).reshape(n_wavespeed,n_station,grid_size_x,grid_size_y,grid_size_z)
- return result_list
- def add_gaussian_pertubation(x,y,z,sx,sy,sz,A,grid_size):
- Y,X,Z = np.meshgrid(np.linspace(0,1,grid_size), np.linspace(0,1,grid_size),np.linspace(0,1,grid_size))
- temp=(X-x)**2/sx**2+(Y-y)**2/sy**2+(Z-z)**2/sz**2
- temp=np.exp(-temp/2)
- return A*temp/temp.max()
- def gen_station(n_station,config,seed=0):
- np.random.seed(seed)
- dx =config['dx(km)']
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- x = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- y = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- z = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- station_loc=[]
- for i in range(n_station):
- loc=[x[np.random.randint(len(x))],y[np.random.randint(len(y))],0.0]
- #loc=[x[2],y[18],0.0]
- station_loc.append(loc)
- station_df = []
- for i in range(n_station):
- loc=station_loc[i]
- station_df.append({
- "id": 'S.'+str(i)+'.BH',
- "x(km)": loc[0],
- "y(km)": loc[1],
- "z(km)": loc[2]
- })
- station_df=pd.DataFrame(station_df)
- return station_df
- def gen_source(n_source,frequence,config,seed=0,randomtime=False):
- np.random.seed(seed)
- source_loc=[]
- source_loc_lindex=[]
- source_time=[]
- dx =config['dx(km)']
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- x = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- y = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- z = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- Tmax=60/frequence*n_source
- if randomtime:
- Tlist=np.random.rand(n_source)*Tmax
- else:
- Tlist=np.linspace(0,Tmax,n_source)
- for n in range(n_source):
- #idxs=[np.random.randint(len(x)),np.random.randint(len(y)),np.random.randint(len(z))]
- idxs=[np.random.randint(1,len(x)-1),np.random.randint(1,len(y)-1),np.random.randint(11,len(z)-1)] #avoid boundary
- source_loc_lindex.append(idxs)
- source_loc.append([x[idxs[0]],y[idxs[1]],z[idxs[2]]])
- #source_time.append(np.random.rand()*60/frequence*8)
- source_time.append(Tlist[n])
- catalog_df=[]
- for source_index in range(n_source):
- loc=source_loc[source_index]
- catalog_df.append({
- "event_index": source_index,
- "time": np.datetime64(int(1000*source_time[source_index]), 'ms'),
- "x(km)": loc[0],
- "y(km)": loc[1],
- "z(km)": loc[2],
- })
- catalog_df=pd.DataFrame(catalog_df)
- catalog_df['time'] = catalog_df['time'].apply(lambda x: UT(x))
- return source_loc,source_loc_lindex,source_time,catalog_df
- import torch
- class TravelTimeDataset(Dataset):
- def __init__(self,travel_time_list,V_paramter_list,config,station_df):
- self.n_wavespeed=len(V_paramter_list)
- self.n_station=len(station_df)
- self.dx=config['dx(km)']
- self.input_scale=100
- self.out_scale=100
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- x = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- y = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- z = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- X, Y, Z = np.meshgrid(x,y,z)
- X=X.transpose(1,0,2)
- Y=Y.transpose(1,0,2)
- Z=Z.transpose(1,0,2)
- self.X =(X-config['x(km)'][0])/(config['x(km)'][1]-config['x(km)'][0])
- self.Y =(Y-config['y(km)'][0])/(config['y(km)'][1]-config['y(km)'][0])
- self.Z =(Z-config['z(km)'][0])/(config['z(km)'][1]-config['z(km)'][0])
- self.grid_sizes=[grid_size_x,grid_size_y,grid_size_z]
- self.travel_time_list=travel_time_list
- self.n_gt=grid_size_x*grid_size_y*grid_size_z
- self.V_paramter_list=V_paramter_list
- ##station
- print(self.X.shape,self.Y.shape,self.Z.shape)
- print(travel_time_list.shape)
- #self.station_locs=np.array([station_df['x(km)'],station_df['y(km)'],station_df['z(km)']])
- def __len__(self):
- return self.n_wavespeed*self.n_gt
- def __getitem__(self, idx):
- idx_wavespeed,id_= idx//self.n_gt,idx%self.n_gt
- idx,id_= id_//(self.grid_sizes[1]*self.grid_sizes[2]),id_%(self.grid_sizes[1]*self.grid_sizes[2])
- idy,idz= id_//self.grid_sizes[2],id_%self.grid_sizes[2]
- input=np.concatenate([self.V_paramter_list[idx_wavespeed], [self.X[idx,idy,idz]], [self.Y[idx,idy,idz]],[self.Z[idx,idy,idz]]])
- output=self.travel_time_list[idx_wavespeed,:,idx,idy,idz]
- image = {'in':input,'out':output}
- return image
- class TravelTimeDataset_NF(Dataset):
- def __init__(self,travel_time_list,WaveSpeedData,p_list,model_autoencoder,device,config,beta=0):
- self.n_wavespeed=len(WaveSpeedData)
- self.dx=config['dx(km)']
- dx=self.dx
- self.beta=beta
- #ATE_train_loader = torch.utils.data.DataLoader(WaveSpeedData, batch_size=128, shuffle=False)
- model_autoencoder.eval()
- with torch.no_grad():
- data=torch.tensor(WaveSpeedData.data_wavespeed).unsqueeze(1).float().to(device)
- _,emb=model_autoencoder(data)
- p=emb.clone().detach().cpu().squeeze()
- self.z=torch.sigmoid(self.beta*p).numpy()
- self.p_list=p_list
- if self.z.ndim == 1:
- self.z = np.expand_dims(self.z, axis=-1)
- print('z,',self.z[:5])
- grid_size_x= int((config['x(km)'][1]-config['x(km)'][0])/dx+1)
- grid_size_y= int((config['y(km)'][1]-config['y(km)'][0])/dx+1)
- grid_size_z= int((config['z(km)'][1]-config['z(km)'][0])/dx+1)
- x = np.linspace(config['x(km)'][0],config['x(km)'][1],grid_size_x)
- y = np.linspace(config['y(km)'][0],config['y(km)'][1],grid_size_y)
- z = np.linspace(config['z(km)'][0],config['z(km)'][1],grid_size_z)
- X, Y, Z = np.meshgrid(x,y,z)
- X=X.transpose(1,0,2)
- Y=Y.transpose(1,0,2)
- Z=Z.transpose(1,0,2)
- self.X =(X-config['x(km)'][0])/(config['x(km)'][1]-config['x(km)'][0])
- self.Y =(Y-config['y(km)'][0])/(config['y(km)'][1]-config['y(km)'][0])
- self.Z =(Z-config['z(km)'][0])/(config['z(km)'][1]-config['z(km)'][0])
- self.grid_sizes=[grid_size_x,grid_size_y,grid_size_z]
- self.travel_time_list=travel_time_list
- self.n_gt=grid_size_x*grid_size_y*grid_size_z
- #self.V_paramter_list=V_paramter_list
- ##station
- print(self.X.shape,self.Y.shape,self.Z.shape)
- print(travel_time_list.shape)
- #self.station_locs=np.array([station_df['x(km)'],station_df['y(km)'],station_df['z(km)']])
- def __len__(self):
- return self.n_wavespeed*self.n_gt
- def __getitem__(self, idx):
- idx_wavespeed,id_= idx//self.n_gt,idx%self.n_gt
- idx,id_= id_//(self.grid_sizes[1]*self.grid_sizes[2]),id_%(self.grid_sizes[1]*self.grid_sizes[2])
- idy,idz= id_//self.grid_sizes[2],id_%self.grid_sizes[2]
- input=np.concatenate([self.z[idx_wavespeed], [self.X[idx,idy,idz]], [self.Y[idx,idy,idz]],[self.Z[idx,idy,idz]]])
- output=self.travel_time_list[idx_wavespeed,:,idx,idy,idz]
- p=self.p_list[idx_wavespeed]
- image = {'in':input,'out':output,'p':p}
- return image
NF_utils.py at commit 7adf666, under MIT · at the source
Overview
- Department of Mathematics and Computer Science, University of Basel,Basel, Switzerland
- Département d’Informatique, École normale supérieure, PSL University,Paris, France
- Department of Earth Sciences, La Sapienza Università di Roma,Roma, Italy
- Department of Geosciences, Pennsylvania State University,University Park, PA USA
- Simons Chair in Computational and Applied Mathematics and Earth Science, Rice University,Houston, TX USA
- Department of ECE, University of Illinois at Urbana–Champaign,Champaign, IL USA
Abstract
The abstract is not reproduced here: the paper's license (CC BY-NC-ND) does not allow it. Read it in the paper, at the publisher or on Europe PMC.
Repositories
Its files are read in the Code ↔ Paper reader above.
DaDaCheng/phase_association
7adf66667eee66a2d5e34ceb47df584dba8ad1d2, 1 September 2026Availability: 1 check, the latest on 27 September 2026: the link answers
- 27 September 2026: the link answers
11 files
- harpa/
NF_utils.py , Python, 299 lines - harpa/
__init__.py , Python, 1 line - harpa/
harpa.py , Python, 508 lines - harpa/
load_data.py , Python, 234 lines - harpa/
model.py , Python, 312 lines - harpa/
plt_utils.py , Python, 548 lines - harpa/
sgld.py , Python, 75 lines - harpa/
utils.py , Python, 972 lines - setup.py, Python, 22 lines
- LICENSE, License, 21 lines
- README.md, Text, 184 lines
Zenodo 19766525
Availability: 1 check, the latest on 27 September 2026: the link answers (HTTP 200)
- 27 September 2026: the link answers (HTTP 200)
11 files
- harpa/
NF_utils.py , Python, 299 lines - harpa/
__init__.py , Python, 1 line - harpa/
harpa.py , Python, 508 lines - harpa/
load_data.py , Python, 234 lines - harpa/
model.py , Python, 312 lines - harpa/
plt_utils.py , Python, 548 lines - harpa/
sgld.py , Python, 75 lines - harpa/
utils.py , Python, 972 lines - setup.py, Python, 22 lines
- LICENSE, License, 21 lines
- README.md, Text, 182 lines
Code availability statement
The paper has a code availability statement. Its license (CC BY-NC-ND) does not allow reproducing it here; in short, from what the harvester recognized in it:
- it points to the authors' code: DaDaCheng/
phase_association , Zenodo 19766525
Read it in the paper: doi.org/10.1038/s41467-026-74092-y.
Tracing map
Proposed by the machine: these links were found in the paper and verified at the source, without human review. The map will receive a Zenodo DOI once one of the paper's authors has validated it with their ORCID.
What the map holds:
- 2 repositories of the authors' code, each at its verified commit, with its license and how the link was found in the paper;
- 18 scripts, each with its path and the digest of its content;
- no match between paragraphs and code yet;
- neither the text of the paper nor the code itself.
Its JSON (tracing-map.json) is deposited on Zenodo with its DOI once the map is validated.
Data
No dataset and no data link were found in the paper.
Code and data availability statement
The paper has a code and data availability statement. Its license (CC BY-NC-ND) does not allow reproducing it here; in short, from what the harvester recognized in it:
- it points to the authors' code: DaDaCheng/
phase_association , Zenodo 19766525
Read it in the paper: doi.org/10.1038/s41467-026-74092-y.
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The history of this record: each version stored by the harvester or made by a correction of its authors or of the maintainers of its code, and what changed in its facts. The texts of the paper (its abstract, its availability statements) are not part of it; versions that changed only those are not listed.
Version 1, 27 September 2026: the first record
Recorded: type, language, journal, volume, issue, pages, dates, 5 authors, 2 keywords, 2 funders, 29 references.
Cite
This paper
Shi, C., Poggiali, G., Marone, C., de Hoop, M. V., & Dokmanić, I. (2026). High-rate phase association with travel time neural fields. Nature communications, 17(1), 8140. https://
BibTeX
@article{shi2026high,
author = {Shi, Cheng and Poggiali, Giulio and Marone, Chris and de Hoop, Maarten V. and Dokmanić, Ivan},
title = {{High-rate phase association with travel time neural fields}},
journal = {Nature communications},
year = {2026},
month = jun,
volume = {17},
number = {1},
pages = {8140},
publisher = {Nature Publishing Group},
issn = {2041-1723},
doi = {10.1038/
url = {https://
pmid = {42380143},
pmcid = {PMC13457860}
}
RIS
TY - JOUR
AU - Shi, Cheng
AU - Poggiali, Giulio
AU - Marone, Chris
AU - de Hoop, Maarten V.
AU - Dokmanić, Ivan
TI - High-rate phase association with travel time neural fields
T2 - Nature communications
J2 - Nat Commun
PY - 2026
DA - 2026/
VL - 17
IS - 1
SP - 8140
SN - 2041-1723
PB - Nature Publishing Group
DO - 10.1038/
UR - https://
LA - en
ER -
CSL-JSON
{
"id": "10.1038/
"type": "article-journal",
"title": "High-rate phase association with travel time neural fields",
"container-title": "Nature communications",
"author": [
{
"family": "Shi",
"given": "Cheng"
},
{
"family": "Poggiali",
"given": "Giulio"
},
{
"family": "Marone",
"given": "Chris"
},
{
"family": "de Hoop",
"given": "Maarten V."
},
{
"family": "Dokmanić",
"given": "Ivan"
}
],
"container-title-short":
"volume": "17",
"issue": "1",
"page": "8140",
"DOI": "10.1038/
"PMID": "42380143",
"PMCID": "PMC13457860",
"ISSN": "2041-1723",
"publisher": "Nature Publishing Group",
"URL": "https://
"language": "en",
"issued": {
"date-parts": [
[
2026,
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30
]
]
}
}
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