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Record W2360178671

Research on gusts caused by high-speed trains passing through tunnel

2015· article· en· W2360178671 on OpenAlexaff
Jiqiang Niu

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldEngineering
TopicRailway Systems and Energy Efficiency
Canadian institutionsMinistry of Education and Child Care
Fundersnot available
KeywordsTrainMarshallingRailway tunnelEngineeringMarine engineeringAmplitudeSimulationStructural engineeringComputer sciencePhysics
DOInot available

Abstract

fetched live from OpenAlex

By numerical calculation method,train going through tunnel and trains intersecting in the middle of tunnel at different speed( 200,250,300 and 350 km / h) were simulated,and gusts introduced by train was analyzed. Numerical calculation method was modified by the full- scale test data. The results show that,gusts caused by wake of train are the biggest. Gusts in tunnel are significantly influenced by the number of train carriages. Gusts introduced by 16- carriage train are greater than that of 8- carriage train,and the growth reaches70. 49%. It is an approximate linear relationship at nearby side and far side of train between the gusts speed and train speed when train passing through tunnel. While it is no longer linear relationship between gusts speed and variation of train speed when trains crossing in tunnel. The gusts introduced by trains crossing in tunnel is 1. 6times of one introduced by train going through tunnel. Two trains crossing in the middle of the tunnel have a certain influence on the amplitude of gusts. At the nearby side of train,gusts caused by train passing through the tunnel are bigger than that introduced by marshaling train crossing in the tunnel. At the far side of train,gusts caused by train meeting in the tunnel are bigger than that introduced by marshaling train passing through the tunnel.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: Not applicable
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.308
Threshold uncertainty score0.508

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.109
GPT teacher head0.319
Teacher spread0.210 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations3
Published2015
Admission routes1
Has abstractyes

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