影响因子(Impact Factors)是衡量一个学术刊物地位的主要因素。它是建立在科学引文（Science Cited index）基础上的一种统计结果。其主要依据就是一定时期（一般为2年）内某种学术刊物所载论文被引用次数与该刊物所载论文数的一个比例，比例越高，表明该刊所载论文被引用次数越多，从而说明该刊所载论文的影响较大，质量较好，水平较高，因而该刊的质量自然也高。比如Cell，其影响因子值约40左右，而中国科学则为0.2左右。当然，这只是评价一个学术刊物的几种综合指标之一，但其影响力却较大。SCI生命科学[屏蔽]影响因子如下：
CELL                                                     40.481
ANNUAL REVIEW OF CELL BIOLOGY               30.548
NATURE GENETICS                                   28.543
NATURE                                                   27.074
IMMUNOLOGY TODAY                                 25.228
NEW ENGLAND JOURNAL OF MEDICINE           22.412
SCIENCE                                                 21.911
TRENDS IN NEUROSCIENCES                       19.972
GENES & DEVELOPMENT                             18.793
LANCET                                                   17.490
TRENDS IN BIOCHEMICAL SCIENCES             17.217
NEURON                                                 16.619
IMMUNITY                                                 15.354
JOURNAL OF EXPERIMENTAL MEDICINE           15.126
BRAIN RESEARCH REVIEWS                         13.962
EMBO JOURNAL                                         13.505
FEDERATION PROCEEDINGS 13.404
TRENDS IN CELL BIOLOGY 12.748
JOURNAL OF CELL BIOLOGY 12.480
ANNUAL REVIEW OF PHYSIOLOGY 12.059
ARCHIVES OF GENERAL PSYCHIATRY 11.155
PNAS 10.520
MOLECULAR AND CELLULAR BIOLOGY 10.498
TRENDS IN GENETICS 10.446
JOURNAL OF THE NATIONAL CANCER INSTITUTE 10.165
ANNALS OF INTERNAL MEDICINE 9.920
MOLECULAR BIOLOGY OF THE CELL 9.376
AMERICAN JOURNAL OF HUMAN GENETICS 9.262
DEVELOPMENT 9.162
REVIEWS OF PHYSIOLOGY BIOCHEMISTRY AND PHARMACOLOGY 8.833
CIRCULATION 8.822
CURRENT OPINION IN IMMUNOLOGY 8.792
JOURNAL OF CLINICAL INVESTIGATION 8.788
HUMAN GENE THERAPY 8.728
BLOOD 8.569
CANCER RESEARCH 8.206
JOURNAL OF NEUROSCIENCE 8.205
GASTROENTEROLOGY 8.203
GENE THERAPY 8.063
CIRCULATION RESEARCH 8.002
ONCOGENE 7.991
PROTEIN PROFILE 7.600
JOURNAL OF IMMUNOLOGY 7.412
JOURNAL OF BIOLOGICAL CHEMISTRY 7.385
CURRENT OPINION IN STRUCTURAL BIOLOGY 7.376
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH 6.983
JOURNAL OF CLINICAL ONCOLOGY 6.922
ANNALS OF NEUROLOGY 6.699
MOLECULAR PHARMACOLOGY 6.580
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM 6.555
JOURNAL OF THE AMERICAN SOCIETY OF NEPHROLOGY 6.551
AMERICAN REVIEW OF RESPIRATORY DISEASE 6.421
AMERICAN JOURNAL OF PATHOLOGY 6.334
JOURNAL OF VIROLOGY 6.033
EUROPEAN JOURNAL OF IMMUNOLOGY 6.015
IMMUNOLOGICAL REVIEWS 5.946
JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY 5.831
JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY 5.793
SEMINARS IN CANCER BIOLOGY 5.607
BIOESSAYS 5.576
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY 5.533
HEPATOLOGY 5.392
PROGRESS IN BIOPHYSICS & MOLECULAR BIOLOGY 5.379
JOURNAL OF MOLECULAR BIOLOGY 5.346
INTERNATIONAL REVIEW OF CYTOLOGY-A SURVEY OF CELL BIOLOGY 5.292
HUMAN MOLECULAR GENETICS 5.273
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 5.263
QUARTERLY REVIEWS OF BIOPHYSICS 5.211
PROTEINS-STRUCTURE FUNCTION AND GENETICS 5.162
BIOCHEMISTRY 5.144
MOLECULAR MICROBIOLOGY 5.024
PHARMACOGENETICS 4.988
HYPERTENSION 4.981
ADVANCES IN SECOND MESSENGER AND PHOSPHOPROTEIN RESEARCH 4.972
EUROPEAN JOURNAL OF NEUROSCIENCE 4.921
JOURNAL OF NEUROCHEMISTRY 4.852
JOURNAL OF CELL SCIENCE 4.827
GLIA 4.809
PROTEIN SCIENCE 4.806
GENES CHROMOSOMES & CANCER 4.764
DEVELOPMENTAL BIOLOGY 4.752
LABORATORY INVESTIGATION 4.751
BRITISH JOURNAL OF PHARMACOLOGY 4.739
ENDOCRINOLOGY 4.736
NEUROLOGY 4.633
JOURNAL OF PATHOLOGY 4.617
ANALYTICAL CHEMISTRY 4.509
GENETICS 4.509
PHARMACOLOGY & THERAPEUTICS 4.469
THROMBOSIS AND HAEMOSTASIS 4.464
ANNALS OF SURGERY 4.440
CURRENT BIOLOGY 4.406
JOURNAL OF LIPID RESEARCH 4.340
TRENDS IN CARDIOVASCULAR MEDICINE 4.338
INTERNATIONAL IMMUNOLOGY 4.333
JOURNAL OF PHYSIOLOGY-LONDON 4.327
NEUROSCIENCE 4.288
NUCLEIC ACIDS RESEARCH 4.235
CELL GROWTH & DIFFERENTIATION 4.179
ARCHIVES OF INTERNAL MEDICINE 4.166
BIOCHEMICAL JOURNAL 4.159
FREE RADICAL BIOLOGY AND MEDICINE 4.089
GENOMICS 4.089
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY 4.029
AMERICAN JOURNAL OF RESPIRATORY CELL AND MOLECULAR BIOLOGY 4.014
JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM 4.002
KIDNEY INTERNATIONAL 3.995
JOURNAL OF NUCLEAR MEDICINE 3.960
DRUGS 3.903
JOURNAL OF BACTERIOLOGY 3.903
VIROLOGY 3.901
RADIOLOGY 3.899
FEBS LETTERS 3.842
DNA AND CELL BIOLOGY 3.788
INFECTION AND IMMUNITY 3.721
JOURNAL OF INVESTIGATIVE DERMATOLOGY 3.681
JOURNAL OF LEUKOCYTE BIOLOGY 3.639
JOURNAL OF NEUROIMMUNOLOGY 3.639
CANCER GENE THERAPY 3.607
TRENDS IN BIOTECHNOLOGY 3.606
JOURNAL OF COMPARATIVE NEUROLOGY 3.584
JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS 3.582
JOURNAL OF MOLECULAR EVOLUTION 3.519
RECEPTORS & CHANNELS 3.516
JOURNAL OF ALLERGY 3.508
CYTOGENETICS AND CELL GENETICS 3.502
CARDIOVASCULAR RESEARCH 3.494
EXPERIMENTAL HEMATOLOGY 3.458
EUROPEAN JOURNAL OF BIOCHEMISTRY 3.451
BRITISH JOURNAL OF CANCER 3.449
HUMAN MUTATION 3.439
JOURNAL OF HISTOCHEMISTRY & CYTOCHEMISTRY 3.427
CELL CALCIUM 3.419
JOURNAL OF GENERAL VIROLOGY 3.410
INTERNATIONAL JOURNAL OF CANCER 3.403
JOURNAL OF NEUROSCIENCE RESEARCH 3.377
HIPPOCAMPUS 3.341
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY 3.251
AMERICAN JOURNAL OF PHYSIOLOGY 3.244
EUROPEAN JOURNAL OF HUMAN GENETICS 3.205
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS 3.179
CLINICAL CHEMISTRY 3.169
CARCINOGENESIS 3.153
BIOLOGY OF REPRODUCTION 3.123
CANCER TREATMENT REVIEWS 3.106
PLANT MOLECULAR BIOLOGY 3.089
JOURNAL OF CELLULAR BIOCHEMISTRY 3.075
JOURNAL OF CELLULAR PHYSIOLOGY 3.049
MOLECULAR & GENERAL GENETICS 2.976
MOLECULAR BIOLOGY REPORTS 2.932
ATHEROSCLEROSIS 2.880
BREAST CANCER RESEARCH AND TREATMENT 2.879
CANCER 2.864
JOURNAL OF MEMBRANE BIOLOGY 2.844
CYTOKINE 2.836
IMMUNOLOGY 2.832
TRANSPLANTATION 2.829
CHROMOSOMA 2.825
EUROPEAN JOURNAL OF CELL BIOLOGY 2.802
GROWTH FACTORS 2.802
PCR-METHODS AND APPLICATIONS 2.783
JOURNAL OF MOLECULAR AND CELLULAR CARDIOLOGY 2.780
ARCHIVES OF BIOCHEMISTRY 2.767
ELECTROPHORESIS 2.730
JOURNAL OF MOLECULAR ENDOCRINOLOGY 2.727
MAMMALIAN GENOME 2.714
TOXICOLOGY AND APPLIED PHARMACOLOGY 2.703
JOURNAL OF MEDICAL GENETICS 2.701
BRAIN RESEARCH 2.687
NEUROENDOCRINOLOGY 2.684
CLINICAL AND EXPERIMENTAL IMMUNOLOGY 2.680
PFLUGERS ARCHIV FUR DIE GESAMTE PHYSIOLOGIE DES MENSCHEN UND DER TIERE 2.646
EUROPEAN JOURNAL OF PHARMACOLOGY 2.637
BRITISH JOURNAL OF HAEMATOLOGY 2.616
EUROPEAN CYTOKINE NETWORK 2.604
DEMENTIA 2.594
DEVELOPMENTAL GENETICS 2.577
NEUROREPORT 2.570
CYTOMETRY 2.552
HUMAN GENETICS 2.551
ACTA NEUROPATHOLOGICA 2.546
JOURNAL OF IMMUNOTHERAPY 2.520
BIOCHIMICA ET BIOPHYSICA ACTA 2.500
JOURNAL OF APPLIED CRYSTALLOGRAPHY 2.497
FREE RADICAL RESEARCH 2.468
TRANSGENIC RESEARCH 2.466
THEORETICAL AND APPLIED GENETICS 2.452
BIOCHEMICAL PHARMACOLOGY 2.447
BIOLOGICAL REVIEWS OF THE CAMBRIDGE PHILOSOPHICAL SOCIETY 2.429
LEUKEMIA 2.350
HISTOCHEMIE 2.348
JOURNAL OF VASCULAR SURGERY 2.348
LIFE SCIENCES 2.345
CLINICAL & EXPERIMENTAL METASTASIS 2.330
MOLECULAR IMMUNOLOGY 2.330
DIFFERENTIATION 2.329
JOURNAL OF HYPERTENSION 2.318
NEUROSCIENCE LETTERS 2.318
BIOPOLYMERS 2.307
BIOTECHNIQUES 2.305
JOURNAL OF CHROMATOGRAPHY A 2.296
JOURNAL OF AUTONOMIC PHARMACOLOGY 2.286
EUROPEAN RESPIRATORY JOURNAL 2.275
IMMUNOBIOLOGY 2.270
SCIENTIFIC AMERICAN 2.265
TETRAHEDRON LETTERS 2.257
ANNALS OF ONCOLOGY 2.256
JOURNAL OF LABORATORY AND CLINICAL MEDICINE 2.255
DEVELOPMENTAL BRAIN RESEARCH 2.246
JOURNAL OF RHEUMATOLOGY 2.239
AMERICAN JOURNAL OF CARDIOLOGY 2.238
NEUROCHEMISTRY INTERNATIONAL 2.236
CELL AND TISSUE RESEARCH 2.204
EUROPEAN JOURNAL OF CLINICAL INVESTIGATION 2.174
CURRENT GENETICS 2.171
BONE AND MINERAL 2.162
VIRUS RESEARCH 2.161
GENE 2.160
PHYSICAL REVIEW E 2.159
TETRAHEDRON 2.147
MEDICAL MICROBIOLOGY AND IMMUNOLOGY 2.145
VISUAL NEUROSCIENCE 2.137
EUROPEAN JOURNAL OF CANCER 2.095
SEMINARS IN HEMATOLOGY 2.095
JOURNAL OF CHEMICAL NEUROANATOMY 2.092
PEPTIDES 2.092
CLINICAL IMMUNOLOGY AND IMMUNOPATHOLOGY 2.088
CLINICAL SCIENCE AND MOLECULAR MEDICINE 2.070
GENOME 2.069
SURGERY 2.063
NEWS IN PHYSIOLOGICAL SCIENCES 2.052
AMERICAN JOURNAL OF KIDNEY DISEASES 2.048
JOURNAL OF AUTOIMMUNITY 2.044
BONE MARROW TRANSPLANTATION 2.041
BIOSENSORS & BIOELECTRONICS 2.033
BRITISH HEART JOURNAL 2.031
BRITISH JOURNAL OF ANAESTHESIA 2.025
JOURNAL OF STRUCTURAL BIOLOGY 2.020
YEAST 2.000
ANALYTICAL BIOCHEMISTRY 1.996
EXPERIMENTAL BRAIN RESEARCH 1.967
MEDICAL PHYSICS 1.902
JOURNAL OF IMMUNOLOGICAL METHODS 1.901
EPILEPSY RESEARCH 1.897
NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY 1.889
ANALYTICA CHIMICA ACTA 1.887
AMERICAN JOURNAL OF HYPERTENSION 1.880
BIOLOGICAL CHEMISTRY HOPPE-SEYLER 1.860
CANCER SURVEYS 1.857
EUROPEAN BIOPHYSICS JOURNAL 1.857
ONCOLOGY 1.857
RESEARCH IN MICROBIOLOGY 1.857
BRITISH JOURNAL OF SURGERY 1.842
AMERICAN JOURNAL OF MEDICAL GENETICS 1.836
NEUROMUSCULAR DISORDERS 1.818
GANN 1.805
STEM CELLS 1.803
ANATOMY AND EMBRYOLOGY 1.801
ARCHIV FUR MIKROBIOLOGIE 1.801
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS 1.771
ANTIVIRAL CHEMISTRY & CHEMOTHERAPY 1.767
JOURNAL OF STEROID BIOCHEMISTRY AND MOLECULAR BIOLOGY 1.739
BIOCHIMIE 1.735
JOURNAL OF ELECTROANALYTICAL CHEMISTRY 1.735
JOURNAL OF CARDIOVASCULAR PHARMACOLOGY 1.709
CANCER IMMUNOLOGY IMMUNOTHERAPY 1.702
PSYCHONEUROENDOCRINOLOGY 1.699
BIOPHYSICAL CHEMISTRY 1.696
EUROPEAN HEART JOURNAL 1.682
MAGNETIC RESONANCE IMAGING 1.672
COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 1.669
COMPUTER APPLICATIONS IN THE BIOSCIENCES 1.668
INTERNATIONAL JOURNAL OF DEVELOPMENTAL NEUROSCIENCE 1.648
INFLAMMATION 1.643
ANALYST 1.641
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1 1.641
MOLECULAR AND CELLULAR BIOCHEMISTRY 1.625
SEMINARS IN ONCOLOGY 1.608
NEUROPEPTIDES 1.601
MOLECULAR NEUROBIOLOGY 1.600
CANCER CHEMOTHERAPY AND PHARMACOLOGY 1.598
COMPUTER PHYSICS COMMUNICATIONS 1.598
METHODS IN ENZYMOLOGY 1.586
NEUROCHEMICAL RESEARCH 1.577
AMERICAN JOURNAL OF HEMATOLOGY 1.568
ANNALS OF THORACIC SURGERY 1.568
SEMINARS IN NEPHROLOGY 1.533
APPLIED SPECTROSCOPY 1.531
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS 1.528
CARBOHYDRATE RESEARCH 1.506
PROTEIN EXPRESSION AND PURIFICATION 1.497
ACTA PHYSIOLOGICA SCANDINAVICA 1.496
PURE AND APPLIED CHEMISTRY 1.495
JOURNAL OF CONTROLLED RELEASE 1.483
JOURNAL OF VIROLOGICAL METHODS 1.464
JOURNAL OF CANCER RESEARCH AND CLINICAL ONCOLOGY 1.459
DISEASES OF THE COLON & RECTUM 1.450
CLINICAL NEPHROLOGY 1.441
NATURAL IMMUNITY 1.431
NEPHROLOGY DIALYSIS TRANSPLANTATION 1.424
INTERNATIONAL JOURNAL OF PROTEIN RESEARCH 1.410
JOURNAL OF INORGANIC BIOCHEMISTRY 1.399
STEROIDS 1.396
THERIOGENOLOGY 1.395
JOURNAL OF LIPID MEDIATORS AND CELL SIGNALLING 1.393
JOURNAL OF CRYSTAL GROWTH 1.390
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 1.363
ONCOLOGY RESEARCH 1.361
INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 1.356
PRENATAL DIAGNOSIS 1.355
ENDOSCOPY 1.354
SENSORS AND ACTUATORS B-CHEMICAL 1.333
FIBRINOLYSIS 1.329
BIOELECTROCHEMISTRY AND BIOENERGETICS 1.324
RESEARCH IN IMMUNOLOGY 1.321
MACROMOLECULAR THEORY AND SIMULATIONS 1.312
HUMAN HEREDITY 1.302
BULLETIN OF MATHEMATICAL BIOLOGY 1.300
BULLETIN OF MATHEMATICAL BIOLOGY 1.300
NUCLEOSIDES & NUCLEOTIDES 1.293
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY 1.291
AMERICAN HEART JOURNAL 1.290
LASERS IN SURGERY AND MEDICINE 1.288
REGULATORY PEPTIDES 1.288
CANCER INVESTIGATION 1.282
BIOCHEMICAL SOCIETY TRANSACTIONS 1.275
ELECTROANALYSIS 1.266
WORLD JOURNAL OF SURGERY 1.262
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL 1.261
AUTOIMMUNITY 1.257
JOURNAL OF CHROMATOGRAPHY B-BIOMEDICAL APPLICATIONS 1.255
DOMESTIC ANIMAL ENDOCRINOLOGY 1.254
ARCHIV FUR TOXIKOLOGIE 1.249
IMMUNOLOGY AND CELL BIOLOGY 1.242
RESEARCH IN VIROLOGY 1.231
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 1.226
CANCER LETTERS 1.219
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES 1.205
JOURNAL OF BIOTECHNOLOGY 1.203
ANNALS OF HEMATOLOGY 1.182
MECHANISMS OF AGEING AND DEVELOPMENT 1.182
LEUKEMIA RESEARCH 1.179
PLANT SCIENCE 1.179
JOURNAL OF DAIRY SCIENCE 1.161
IMMUNOPHARMACOLOGY 1.157
MOLECULAR AND CHEMICAL NEUROPATHOLOGY 1.151
JOURNAL OF PHARMACEUTICAL SCIENCES 1.148
JOURNAL OF PLANT PHYSIOLOGY 1.142
VIBRATIONAL SPECTROSCOPY 1.138
EXPERIMENTAL GERONTOLOGY 1.124
INTERNATIONAL JOURNAL OF ONCOLOGY 1.110
ANALYTICAL CELLULAR PATHOLOGY 1.103
CLINICA CHIMICA ACTA 1.101
PROGRESS IN HISTOCHEMISTRY AND CYTOCHEMISTRY 1.087
EXPERIMENTAL NEPHROLOGY 1.085
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY 1.065
JOURNAL DE PHYSIOLOGIE 1.062
FEMS IMMUNOLOGY AND MEDICAL MICROBIOLOGY 1.056
XENOBIOTICA 1.052
JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTAL 1.048
JOURNAL OF PROTEIN CHEMISTRY 1.027
RENAL PHYSIOLOGY AND BIOCHEMISTRY 1.012
CLINICAL GENETICS 1.000

貌似是科学部分的
工程类的,比如计算机的,最高的Jounal of ACM,才2.236吧

我只知道对某个人的论文的引用得越多表示这个人在那个领域地位越牛B