| grain boundary | 150 | 11 | 14.9 | 0.011845 | 2004.02908,2004.06192,etc |
| equilibrium point | 95 | 13 | 7.833 | 0.004994 | 2004.03243,2004.05246,etc |
| Fokker-Planck equation | 115 | 16 | 7.6 | 0.004684 | 2004.02683,2004.02791,etc |
| magnetic field line | 59 | 20 | 2.789 | 0.004591 | 2004.01597,2004.03243,etc |
| wave packet | 97 | 20 | 3.053 | 0.004441 | 2004.00380,2004.01533,etc |
| surface tension | 157 | 43 | 3.643 | 0.004353 | 2004.01020,2004.01730,etc |
| edge state | 102 | 13 | 8.417 | 0.004246 | 2004.00887,2004.01051,etc |
| black hole | 36 | 14 | 2.692 | 0.003903 | 2004.00401,2004.01260,etc |
| fine structure | 104 | 28 | 3.778 | 0.003866 | 2004.01443,2004.01530,etc |
| neural network model | 44 | 11 | 3.5 | 0.003854 | 2004.00232,2004.00361,etc |
| network science | 48 | 18 | 2.529 | 0.003763 | 2004.01467,2004.06628,etc |
| inertial range | 128 | 17 | 7.688 | 0.003721 | 2004.00752,2004.02726,etc |
| small particle | 29 | 14 | 2.154 | 0.003352 | 2004.04056,2004.04413,etc |
| conservation law | 90 | 33 | 2.781 | 0.00331 | 2004.01310,2004.02661,etc |
| surface wave | 96 | 16 | 6.333 | 0.003253 | 2004.02260,2004.04110,etc |
| basic reproduction number | 72 | 19 | 3.889 | 0.003194 | 2004.00044,2004.04602,etc |
| exceptional point | 54 | 14 | 4.077 | 0.003194 | 2004.00912,2004.02130,etc |
| group velocity | 101 | 32 | 3.226 | 0.003154 | 2004.00380,2004.00763,etc |
| growth rate | 470 | 72 | 6.606 | 0.003129 | 2004.00559,2004.00752,etc |
| water molecule | 155 | 31 | 5.033 | 0.003111 | 2004.00357,2004.01558,etc |
| periodic orbit | 90 | 11 | 8.9 | 0.00303 | 2004.00127,2004.00887,etc |
| porous medium | 95 | 16 | 6.267 | 0.00299 | 2004.01523,2004.01730,etc |
| decay rate | 86 | 37 | 2.361 | 0.002982 | 2004.00825,2004.01058,etc |
| barrier height | 62 | 12 | 5.182 | 0.002954 | 2004.10962,2004.12256,etc |
| normal mode | 52 | 18 | 3.0 | 0.002884 | 2004.00185,2004.00357,etc |
| output power | 62 | 13 | 5.0 | 0.002866 | 2004.03068,2004.03711,etc |
| energy balance | 71 | 16 | 4.667 | 0.002794 | 2004.00564,2004.02661,etc |
| first Brillouin zone | 39 | 12 | 3.182 | 0.002734 | 2004.02149,2004.05486,etc |
| infected population | 57 | 20 | 2.737 | 0.002729 | 2004.00493,2004.01487,etc |
| time resolution | 126 | 35 | 3.676 | 0.002703 | 2004.00370,2004.00580,etc |
| band gap | 100 | 25 | 4.125 | 0.002688 | 2004.00081,2004.00185,etc |
| dispersion relation | 157 | 41 | 3.9 | 0.002673 | 2004.00185,2004.01270,etc |
| infected case | 35 | 13 | 2.583 | 0.00267 | 2004.00044,2004.00553,etc |
| phase noise | 59 | 14 | 4.231 | 0.002658 | 2004.00763,2004.00824,etc |
| energy barrier | 63 | 21 | 3.1 | 0.002641 | 2004.01148,2004.01276,etc |
| thermal expansion coefficient | 43 | 13 | 3.5 | 0.002585 | 2004.06010,2004.06804,etc |
| proton beam | 46 | 12 | 4.091 | 0.002569 | 2004.01443,2004.01672,etc |
| quantum computer | 61 | 13 | 4.917 | 0.002527 | 2004.04205,2004.07206,etc |
| posterior distribution | 66 | 15 | 3.714 | 0.002457 | 2004.00227,2004.01219,etc |
| photon energy | 114 | 36 | 3.229 | 0.002397 | 2004.00185,2004.00212,etc |
| quality factor | 48 | 14 | 3.308 | 0.002379 | 2004.02754,2004.05700,etc |
| South Korea | 46 | 13 | 3.083 | 0.002371 | 2004.01481,2004.05992,etc |
| degree distribution | 127 | 25 | 5.208 | 0.002363 | 2004.00825,2004.01994,etc |
| infection rate | 79 | 26 | 2.36 | 0.002348 | 2004.00493,2004.00777,etc |
| regularization parameter | 44 | 12 | 3.909 | 0.002336 | 2004.00675,2004.01155,etc |
| electric field | 638 | 171 | 3.741 | 0.00232 | 2004.00040,2004.00185,etc |
| order parameter | 135 | 35 | 3.912 | 0.002315 | 2004.00213,2004.01691,etc |
| liquid film | 79 | 11 | 7.8 | 0.002314 | 2004.07660,2004.09200,etc |
| magnetic field | 946 | 198 | 4.797 | 0.002313 | 2004.00040,2004.00103,etc |
| contact line | 92 | 12 | 8.273 | 0.002311 | 2004.01730,2004.03191,etc |
| beam energy | 36 | 11 | 3.5 | 0.002286 | 2004.01682,2004.04539,etc |
| particle distribution | 42 | 15 | 2.429 | 0.002282 | 2004.02431,2004.03469,etc |
| heat flux | 206 | 34 | 6.212 | 0.002279 | 2004.00564,2004.02882,etc |
| energy surface | 43 | 13 | 3.5 | 0.002277 | 2004.00232,2004.00357,etc |
| current sheet | 33 | 12 | 2.909 | 0.002269 | 2004.01152,2004.02277,etc |
| turbulent transport | 66 | 13 | 5.417 | 0.002266 | 2004.02221,2004.03739,etc |
| optical axis | 67 | 22 | 3.095 | 0.002246 | 2004.00040,2004.00120,etc |
| grid point | 154 | 52 | 3.0 | 0.002235 | 2004.00675,2004.00887,etc |
| gamma ray | 36 | 15 | 2.5 | 0.002215 | 2004.01443,2004.02024,etc |
| correlation length | 36 | 16 | 2.133 | 0.002206 | 2004.05246,2004.07157,etc |
| volume fraction | 67 | 19 | 3.611 | 0.002203 | 2004.00120,2004.00752,etc |
| optical tweezers | 109 | 13 | 9.0 | 0.002153 | 2004.02384,2004.04064,etc |
| force field | 71 | 15 | 4.929 | 0.002146 | 2004.00232,2004.00357,etc |
| diffusion coefficient | 168 | 38 | 4.486 | 0.002145 | 2004.00232,2004.00752,etc |
| scale-free network | 54 | 19 | 2.944 | 0.002118 | 2004.00777,2004.01480,etc |
| bond length | 60 | 11 | 5.9 | 0.002112 | 2004.00357,2004.01058,etc |
| neural network | 358 | 80 | 4.329 | 0.002099 | 2004.00178,2004.00232,etc |
| temporal correlation | 41 | 17 | 2.5 | 0.002094 | 2004.02818,2004.03319,etc |
| oblique incidence | 33 | 12 | 2.909 | 0.002088 | 2004.00882,2004.00953,etc |
| cutoff energy | 33 | 11 | 3.2 | 0.002074 | 2004.00468,2004.00953,etc |
| social medium | 57 | 15 | 4.0 | 0.002073 | 2004.04125,2004.04265,etc |
| refractive index | 147 | 51 | 2.9 | 0.002046 | 2004.00081,2004.00120,etc |
| electron beam | 135 | 27 | 4.115 | 0.002046 | 2004.00212,2004.01443,etc |
| laser power | 75 | 25 | 3.083 | 0.002029 | 2004.00712,2004.01552,etc |
| basis set | 60 | 18 | 3.471 | 0.002022 | 2004.01729,2004.02455,etc |
| wave function | 155 | 41 | 3.775 | 0.002005 | 2004.00388,2004.01443,etc |
| New York City | 44 | 11 | 4.3 | 0.001985 | 2004.04156,2004.10929,etc |
| first moment | 32 | 13 | 2.583 | 0.001984 | 2004.01994,2004.03835,etc |
| triplet state | 77 | 18 | 4.235 | 0.001979 | 2004.00103,2004.01005,etc |
| free surface | 83 | 21 | 4.05 | 0.001976 | 2004.01148,2004.01699,etc |
| angular momentum | 205 | 57 | 3.607 | 0.001975 | 2004.01058,2004.01060,etc |
| electrostatic interaction | 78 | 22 | 3.667 | 0.001965 | 2004.00357,2004.01630,etc |
| electron-hole pair | 48 | 13 | 3.917 | 0.001958 | 2004.00081,2004.00851,etc |
| topological charge | 75 | 15 | 5.214 | 0.001958 | 2004.01533,2004.01943,etc |
| laser pulse | 134 | 36 | 3.8 | 0.001943 | 2004.00380,2004.00953,etc |
| shock wave | 74 | 14 | 5.615 | 0.001919 | 2004.02276,2004.04420,etc |
| turbulent state | 47 | 13 | 3.833 | 0.001913 | 2004.00887,2004.01051,etc |
| optical pulse | 31 | 11 | 3.0 | 0.001908 | 2004.02056,2004.02643,etc |
| non-Hermitian system | 68 | 12 | 5.818 | 0.001897 | 2004.00912,2004.03000,etc |
| free path | 72 | 29 | 2.357 | 0.001897 | 2004.01047,2004.01152,etc |
| quantum state | 122 | 43 | 2.881 | 0.001885 | 2004.00103,2004.01533,etc |
| magnetic reconnection | 47 | 18 | 2.588 | 0.001885 | 2004.00887,2004.01152,etc |
| initial datum | 56 | 17 | 3.062 | 0.001877 | 2004.00044,2004.00896,etc |
| orbital angular momentum | 69 | 23 | 3.091 | 0.00187 | 2004.00040,2004.01390,etc |
| contact network | 37 | 11 | 2.2 | 0.001868 | 2004.03349,2004.04602,etc |
| free energy | 196 | 48 | 4.128 | 0.001865 | 2004.00232,2004.01020,etc |
| thermal equilibrium | 64 | 19 | 3.5 | 0.001864 | 2004.03191,2004.04266,etc |
| unit cell | 219 | 52 | 4.255 | 0.00186 | 2004.00185,2004.00468,etc |
| atmospheric pressure | 49 | 23 | 2.182 | 0.001823 | 2004.01148,2004.01558,etc |
| velocity fluctuation | 42 | 20 | 2.158 | 0.001815 | 2004.00752,2004.01565,etc |
|