2,559 research outputs found
Resting metabolic rate, body composition, and physical activity in chronic stroke patients- a pilot study
No full text
Evidence in practice: does cardiac rehabilitation improve quality of life for a man with coronary artery disease who received percutaneous transluminal coronary angioplasty with insertion of a stent?
No full textEffects of physical training on functional status in patients with prolonged mechanical ventilation
No full textAdaptive Mesh Refinement Code and The YT project Integration and Application
No full textYT是一個廣泛應用於天文物理模擬以及資料分析的繪圖分析軟體。YT亦是一個設計給高解析度自適性網格模擬程式的整合平台。在我們的研究中，我們利用HDF5 (Hierarchy Data Format 5) 的檔案格式，先設計出我們實驗室的GAMER (daptive mesh refinement code with graphics-processing-unit acceleration自適性網格模擬程式) 對YT的整合接面。 此外在輸入輸出上亦採用平行設計。最後，我們利用YT分析了幾種不同的模擬結果，1)暗物質 2)活躍星系核 3)恆星形成 4)磁流體。YT is a visualization and data analysis software widely used in astrophysics, which provides an integrated platform for various multi-resolution simulation codes. In our study, we first construct our GAMER (adaptive mesh refinement code with graphics-processing-unit acceleration) front-end interface for YT, where HDF5 (Hierarchy Data Format 5) format is adopted to improve parallel data I/O and data portability. Finally, we apply YT to analyze four different simulation data sets: 1) cosmological structure formation of the wave dark matter, and 2) interactive jets from active galactic nucleus (AGNs) 3) star formation 4) magnetic hydrodynamics (MHD).誌謝iii
摘要v
Abstract vii
1 Introduction 1
2 Related works 3
2.1 GAMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Basic introduction to GAMER output Data format . . . . . . . . 3
2.2 The YT Project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 HDF5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 YT + Gamer framework 9
3.1 Construct HDF5 data structure . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 YT datastructure.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 io.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.4 fields.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Tests and Applications 19
4.1 Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.1 1D-Radial Profile . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.1.2 Contour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.3 Mapserver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.1.4 Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1.5 Divergence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.1 ELBDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.2 JET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2.3 Magnetic Hydrodynamics . . . . . . . . . . . . . . . . . . . . . 25
4.2.4 Star Formation . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
YT Instruction Manual 33
5.1 Pictures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.1.1 To plot 1D-profile /2D-Phase-plot . . . . . . . . . . . . . . . . . 33
5.1.2 2D Phase plot . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.1.3 Slice/projection/off-axis . . . . . . . . . . . . . . . . . . . . . . 34
5.1.4 Add vector /contour/ streamlines/grids . . . . . . . . . . . . . . . 35
5.1.5 3D streamlines . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.1.6 Volume rendering . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.1.7 3D-Sketchfab . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.1.8 How to parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Conclusion 39
Bibliography 41
Appendix 43
A GAMER Frontend 43
A.1 datastructure.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
A.2 io.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
A.3 fields.py . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
B GAMER HDF5 5
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