Selected journals with Impact Factor indexed .
Acta Clinica Croatica
Impact factor: 0.421 (2013). Subjects: Medicine (General).
Acta Dermatovenerologica Croatica
Impact factor: 0.581 (2013). Subjects: All aspects of the diagnosis and management of skin and venereal diseases.
Acta Nature
Impact factor: 0.872 (2013). Subjects: Molecular biology, biochemistry, biomedical disciplines, and biotechnology.
Acta Neurobiologiae Experimentalis
Impact factor: 2.244 (2013). Subjects: All aspects of neuroscience.
Acta Orthopaedica et Traumatologica Turcica
Annals of Indian Academy of Neurology
Impact factor: 0.624 (2013). Subjects: Neurology, neuropsychiatry, and neuroimaging.
Annals of Thoracic Medicine
Impact factor: 1.338 (2013). Subjects: Pulmonology, thoracic surgery, critical care medicine, respiratory therapy, transplantation, sleep medicine, related basic medical sciences, and more.
Archives of Cardiovascular Diseases
Impact factor: 1.662 (2013). Subjects: Cardiovascular medicine.
Archives of Iranian Medicine
Impact factor: 1.22. Subjects: .
Australian Family Physician
Impact factor: 0.71. Subjects: .
Australian Journal of Advanced Nursing
Impact factor: 0.34. Subjects: .
Basic and Clinical Neuroscience (BCN)
Impact factor: . Subjects: Developmental, molecular, cellular, system, computational, behavioral, cognitive, and clinical neuroscience.
Biochemia Medica
Impact factor: 1.873. Subjects: .
Blood Transfusion
Impact factor: 1.858. Subjects: .
Bratislava Medical Journal
Impact factor: 0.345. Subjects: Biomedical sciences and clinical medicine.
Brazilian Journal of Infectious Diseases
Impact factor: 1.036. Subjects: .
Central European Journal of Public Health
Impact factor: 0.00. Subjects: All spheres of public health.
Cleveland Clinic Journal of Medicine
Impact factor: 3.37 (2013). Subjects: Internal medicine and cardiology.
Clinics and Research in Hepatology and Gastroenterology
Impact factor: 1.983 (2013). Subjects: .
Croatian Medical Journal
Impact factor: 1.373 (2013). Subject: Medicine (General).
Deutsches Ärzteblatt International
Impact factor: 3.542. Subject: Medicine (General).
Environmental Health Perspectives (EHP)
Impact factor: 7.26. Subjects: Public health and environmental sciences.
EuroIntervention
Impact factor: 3.173. Subjects: .
Note: This journal is free, but you will have to register to access the contents.
Folia Biologica
Impact factor: 1.219. Subjects: .
Functional Neurology
Impact factor: 1.518. Subjects: Neurosciences.
Hellenic Journal of Cardiology
Impact factor: 1.227. Subjects: .
Hormones
Impact factor: 2.43. Subjects: Clinical and basic endocrinology and metabolism.
Image Analysis & Stereology
Impact factor: 0.639. Subjects: .
Indian Journal of Biochemistry and Biophysics
Impact factor: 1.026. Subjects: .
Indian Journal of Cancer
Impact factor: 1.131. Subject: All the specialties of oncology.
Indian Journal of Dermatology, Venereology, and Leprology
Impact factor: 1.325 (2013). Subjects: Dermatology, venereology, and leprology.
Indian Journal of Experimental Biology
Impact factor: 1.195. Subjects: Cell biology, molecular biology, genetic engineering, endocrinology, reproductive biology, immunology, developmental biology, comparative physiology, radiation biology, chronobiology, microbiology, pharmacology, toxicology and other biological fields including instrumentation and methodology.
Indian Journal of Medical Research
Impact factor: 2.061. Subject: Biomedical research.
Indian Journal of Ophthalmology
Impact factor: 0.927 (2013). Subjects: Ophthalmology and vision science.
Indian Journal of Orthopaedics
Impact factor: 0.624 (2013). Subjects: Orthopaedics, and traumatology.
Indian Journal of Pathologists and Microbiologists
Impact factor: 0.642 (2013). Subjects: Morbid anatomy, pathology, cytology, hematology, and medical microbiology.
Indian Journal of Pharmacology
Impact factor: 0.679 (2013). Subjects: Clinical and experimental pharmacology.
International Braz J Urol: official journal of the Brazilian Society of Urology
Impact factor: 0.742. Subjects: Urology.
International Journal of Shoulder Surgery
Impact factor: 0.513 (2013). Subjects: Basic science, diagnostic and therapeutic aspects of disorders of the shoulder girdle.
Iranian Journal of Kidney Diseases
Impact factor: 0.94. Subjects: .
Iranian Journal of Neurology
Impact factor: . Subjects: .
Iranian Journal of Pharmaceutical Research
Impact factor: 0.540. Subjects: Pharmacy, materia medica, medicine (General), and health sciences.
Jornal de Pediatria
Impact factor: 1.154. Subjects: Various areas in the field of pediatrics.
Journal of Anthropological Sciences
Impact factor: 1.798. Subjects: All aspects of evolutionary anthropology.
Journal of Applied Oral Science
Impact factor: 0.797. Subjects: .
Journal of Biomedical Science
Impact factor: 2.46. Subject: All fundamental and molecular aspects of basic medical sciences.
Journal of Cancer Research and Therapeutics
Impact factor: 0.761. Subjects: Basic and clinical sciences in oncology including radiation oncology.
Journal of Cytology
Impact factor: 0.413 (2013). Subjects: All aspects of diagnostic cytology, including fine needle aspiration cytology, gynecological and non-gynecological cytology.
Journal of Gastrointestinal and Liver Diseases
Impact factor: 1.849 (2013). Subject: Gastroenterology and hepatology.
Journal of Headache and Pain
Impact factor: 2.779. Subject: Pathology.
Journal of Health, Population and Nutrition
Impact factor: 1.12. Subject: Preference is given to articles dealing with issues of developing countries.
Journal of Medical Biochemistry
Impact factor: 1.084. Subjects: .
Journal of Minimal Access Surgery
Impact factor: 1.374 (2013). Subjects: Minimal access surgery.
Journal of Musculoskeletal and Neuronal Interactions
Impact factor: 2.45. Subject: Pathophysiology and treatment of musculoskeletal disorders.
Journal of Nutritional Science and Vitaminology
Impact factor: 0.992. Subjects: All branches of nutritional science, food science and vitaminology.
Journal of Occupational Health
Impact factor: 1.55. Subject: Internal medicine.
Journal of Pharmacological Science
Impact factor: 2.08. Subject: Therapeutics.
Journal of Physiotherapy
Impact factor: 4.00. Subjects: Physiotherapy.
Journal of Postgraduate Medicine
Impact factor: 1.589. Subjects: Clinical medicine, surgery, pharmaceutical and basic medical sciences with emphasis on health problems and solutions relating to clinicians.
Journal of Visceral Surgery
Impact factor: 1.167. Subjects: .
Malaysian Journal of Nutrition
Impact factor: 0.00. Subjects: Nutrition.
MEMORIAS
Impact factor: 1.363. Subjects: .
Muscle, Ligament and Tendons Journal
Impact factor: 0.00. Subjects: All aspects of clinical and basic research studies related to musculoskeletal, ligament, tendon, public health, exercise physiology and kinesiology issues.
Neurology India
Impact factor: 1.084 (2013). Subjects: Neurology, neurosurgery, neuropsychiatry, neuropathology, neuro-oncology, and neuro-pharmaceutics.
Noise and Health
Impact factor: 1.430 (2013). Subjects: Auditory and non-auditory effects of occupational, environmental, and leisure noise.
Pharmacognosy Magazine
Impact factor: 1.159 (2013). Subjects: Medicinal plant research and development.
Preventing Chronic Disease
Impact factor: 1.585. Subject: Chronic disease prevention.
Puerto Rico Health Sciences Journal
Impact factor: 0.667. Subject: The scope of the journal includes a range of medical, dental, public health, pharmaceutical and biosocial sciences research.
Psychiatria Danubina
Impact factor: 0.633. Subjects: Psychiatry.
São Paulo Medical Journal
Impact factor: 0.588. Subjects: Clinical health science (internal medicine, gynecology and obstetrics, mental health, surgery, pediatrics and public health).
Saudi Journal of Gastroenterology
Impact factor: 1.221 (2013). Subjects: All aspects of digestive diseases, including the prevention, diagnosis and management and related genetics, pathophysiology, and epidemiology as relevant to gastrointestinal and hepatobiliary disorders.
Saudi Journal of Kidney Diseases and Transplantation
Impact factor: 0.00. Subjects: Kidney diseases, urinary tract, renal replacement therapies, and transplantation.
Scandinavian Journal of Surgery
Impact factor: 1.169. Subjects: .
Texas Heart Institute Journal
Impact factor: 0.674. Subjects: Cardiovascular diseases.
Translational Gastroenterology and Hepatology
Subjects: Gastroenterology and hepatology.
Urology Journal
Impact factor: 0.56. Subjects: Urology and nephrology.
Faculty list of Chinese Universities
/in Chinese Government Scholarship, Scholarships /by support serviceIf your dream is to study Masters or PhD in China on a full scholarship then you need to get an acceptance letter from your department professor. Below is the list of Chinese University departments and their faculty members email to help you gain an acceptance letter.
A to Z procedure for Chinese Government Scholarship
/in Chinese Government Scholarship, Scholarships /by support serviceChinese University Program is a full scholarship for designated Chinese universities and certain provincial education offices in specific provinces or autonomous regions to recruit outstanding international students for graduate studies in China. It only supports graduate students.
I Supporting Categories, Duration and Instruction Language
1. Supporting Category. This scholarship only supports graduate and PhD students.
2. Duration. This scholarship only supports master’s students for no more than 3 academic years or doctoral students for no more than 4 academic years. The scholarship covers both major study and Chinese language/preparatory study, as specified in the Admission Letter.
3. Instruction Language
Scholarship students can register for either Chinese-taught program or English-taught program if applicable. (Program Searchcan help you find the program and university you’re interested in by visiting http://www.csc.edu.cn/studyinchina or http://www.campuschina.org).
All applicants are requested to provide their language proficiency certificates for the scholarship applications. Applicants for Chinese-taught programs must provide a valid Chinese Proficiency Test (HSK) certificate. Undergraduate or non-degree (general scholar & senior scholar) candidates should have achieved HSK Level III or above; Postgraduate candidates should have achieved HSK Level IV or above. Applicants for English-taught programs should provide valid English Proficiency Test (IELTS or TOFEL) certificates.
II Scholarship Coverage
The Chinese University Program provides a full scholarship which covers tuition waiver, accommodation, stipend, and comprehensive medical insurance. Please refer to Introduction to CGS—Coverage and Standardfor details of each item.
III Where and When to Apply
Where to Apply
Apply to the designated Chinese universities undertaking program.
When to Apply
You need to apply between early January and early April. Please consult the Chinese universities for the specific deadline of each year.
IV Eligibility
1. Applicants must be a citizen of a country other than the People’s Republic of China, and be in good health
2. The requirements for applicants’ degree and age are that applicants must:
be a high school graduate and no more than 25 when applying for the undergraduate programs;
be a bachelor’s degree holder and no more than 35 when applying for the master’s programs;
be a master’s degree holder and no more than 40 when applying for the doctoral programs.
V Application Procedure
Step 1 – Apply directly to your target university.
Step 2 – Complete the online application procedure at CGS Information Management System for International Students(Visit http://www.csc.edu.cn/studyinchina or http://www.campuschina.org and click “Application Online” to log in), submit online the completed Application Form for Chinese Government Scholarship, and print a hard copy. Please consult your target university for the Instructions of the CGS Information Management System for International Students and Agency Number.
Step 3 – Submit all your application documents to your target university before the deadline.
NOTE
Only applications of recommended candidates from designated Chinese universities will be considered by CSC.
VI Application Documents
a) Application Form for Chinese Government Scholarship (in Chinese or English).
b) Copy of Passport Home Page: Applicant shall submit a clear scanned copy of his/her ordinary passport with validity later than March 1, 2022. If the validity of the current passport does not meet the requirement, please apply for a new passport before submitting the application. For applicants who cannot apply for passports before submitting their applications due to objective reasons, with the permission of dispatching authorities, they may submit scanned copy of identity certificates or official documents containing the applicants’ “English name, Gender, Nationality, Date of Birth” and other information.
c) Notarized highest diploma: Prospective diploma winners must submit official proof of student status by their current school. Documents in languages other than Chinese or English must be attached with notarized Chinese or English translations.
d) Academic transcripts: Transcripts in languages other than Chinese or English must be attached with notarized Chinese or English translations.
e) A Study Plan or Research Proposal in Chinese or English. (A minimum of 200 words for undergraduates, 500 words for non-degree students, and 800 words for postgraduates.)
f) Recommendation letters: Applicants for graduate programs or senior scholar programs must submit two letters of recommendation in Chinese or English from professors or associate professors.
g) Applicants for music studies are requested to submit their own works. Applicants for fine arts programs must submit their own works which include two sketches, two color paintings and two other works.
h) Applicants under the age of 18 should submit the valid documents of their legal guardians in China.
i) Applicants planning to stay in China for more than 6 months must submit a photocopy of the Foreigner Physical Examination Form completed in English (the original copy should be kept by the applicant. The form is designed by the Chinese quarantine authority and can be obtained from the dispatching authority. The physical examinations must cover all the items listed in the Foreigner Physical Examination Form. Incomplete records or those without the signature of the attending physician, the official stamp of the hospital or a sealed photograph of the applicants are invalid. Please select the appropriate time to take physical examination as the result is valid for only 6 months.
j) Non-criminal record report. The applicant shall submit a valid certificate of Non-Criminal Record issued by the local public security authority, usually issued within 6 months prior to the submission date of the application.
Please submit the following documents if applicable
k) Pre-admission Letter from Chinese Government Scholarship universities.
l) Language qualification certificate. e.g., HSK certificates, IELTS or TOFEL report.
Reminder: All uploaded supporting documents must be clear, authentic and valid. Applicants are recommended to use professional device to scan the relevant documents. Applicants shall bear the consequences caused by unclear or unidentifiable uploaded materials.
VII Scholarship Confirmation
1. University reviews the application documents and decides the nominated candidates.
2. Nominated candidates will get Chinese Government Scholarships to study in China with approval of the CSC.
3. CSC reserves the rights to decide the host university for scholarship recipients with multiple offers. Each scholarship recipient—even when admitted by multiple universities—will be granted no more than one scholarship.
4. The CSC reviews eligibility and qualifications of nominated candidates, approves the List of Scholarship Recipients, and sends the admission documents to universities before June 30th. University sends the admission documents (List of Scholarship Recipients, Admission Letter and Visa Application Form for Study in China (JW201)) to scholarship recipients
5. Scholarship recipients shall not allowed to change their host university, field of study, or duration of study stipulated on the Admission Letter after their coming to China.
6. Scholarship will not be reserved if scholarship recipient cannot register before the registration deadline.
VIII List of the 289 Designated Chinese Universities
http://expertresearchservice.com/index.php/2021/02/08/chinese-universities-agency-number-for-chinese-government-scholarship/ ,http://www.csc.edu.cn/studyinchina or http://www.campuschina.org
ExpertResearchService also providing services for Chinese Government Scholarship, to get our services kindly contact us.
OPEN ACCESS JOURNALS WITHOUT PUBLICATION FEES
/in Expert Research Service /by support serviceSelected journals with Impact Factor indexed .
Acta Clinica Croatica
Impact factor: 0.421 (2013). Subjects: Medicine (General).
Acta Dermatovenerologica Croatica
Impact factor: 0.581 (2013). Subjects: All aspects of the diagnosis and management of skin and venereal diseases.
Acta Nature
Impact factor: 0.872 (2013). Subjects: Molecular biology, biochemistry, biomedical disciplines, and biotechnology.
Acta Neurobiologiae Experimentalis
Impact factor: 2.244 (2013). Subjects: All aspects of neuroscience.
Acta Orthopaedica et Traumatologica Turcica
Annals of Indian Academy of Neurology
Impact factor: 0.624 (2013). Subjects: Neurology, neuropsychiatry, and neuroimaging.
Annals of Thoracic Medicine
Impact factor: 1.338 (2013). Subjects: Pulmonology, thoracic surgery, critical care medicine, respiratory therapy, transplantation, sleep medicine, related basic medical sciences, and more.
Archives of Cardiovascular Diseases
Impact factor: 1.662 (2013). Subjects: Cardiovascular medicine.
Archives of Iranian Medicine
Impact factor: 1.22. Subjects: .
Australian Family Physician
Impact factor: 0.71. Subjects: .
Australian Journal of Advanced Nursing
Impact factor: 0.34. Subjects: .
Basic and Clinical Neuroscience (BCN)
Impact factor: . Subjects: Developmental, molecular, cellular, system, computational, behavioral, cognitive, and clinical neuroscience.
Biochemia Medica
Impact factor: 1.873. Subjects: .
Blood Transfusion
Impact factor: 1.858. Subjects: .
Bratislava Medical Journal
Impact factor: 0.345. Subjects: Biomedical sciences and clinical medicine.
Brazilian Journal of Infectious Diseases
Impact factor: 1.036. Subjects: .
Central European Journal of Public Health
Impact factor: 0.00. Subjects: All spheres of public health.
Cleveland Clinic Journal of Medicine
Impact factor: 3.37 (2013). Subjects: Internal medicine and cardiology.
Clinics and Research in Hepatology and Gastroenterology
Impact factor: 1.983 (2013). Subjects: .
Croatian Medical Journal
Impact factor: 1.373 (2013). Subject: Medicine (General).
Deutsches Ärzteblatt International
Impact factor: 3.542. Subject: Medicine (General).
Environmental Health Perspectives (EHP)
Impact factor: 7.26. Subjects: Public health and environmental sciences.
EuroIntervention
Impact factor: 3.173. Subjects: .
Note: This journal is free, but you will have to register to access the contents.
Folia Biologica
Impact factor: 1.219. Subjects: .
Functional Neurology
Impact factor: 1.518. Subjects: Neurosciences.
Hellenic Journal of Cardiology
Impact factor: 1.227. Subjects: .
Hormones
Impact factor: 2.43. Subjects: Clinical and basic endocrinology and metabolism.
Image Analysis & Stereology
Impact factor: 0.639. Subjects: .
Indian Journal of Biochemistry and Biophysics
Impact factor: 1.026. Subjects: .
Indian Journal of Cancer
Impact factor: 1.131. Subject: All the specialties of oncology.
Indian Journal of Dermatology, Venereology, and Leprology
Impact factor: 1.325 (2013). Subjects: Dermatology, venereology, and leprology.
Indian Journal of Experimental Biology
Impact factor: 1.195. Subjects: Cell biology, molecular biology, genetic engineering, endocrinology, reproductive biology, immunology, developmental biology, comparative physiology, radiation biology, chronobiology, microbiology, pharmacology, toxicology and other biological fields including instrumentation and methodology.
Indian Journal of Medical Research
Impact factor: 2.061. Subject: Biomedical research.
Indian Journal of Ophthalmology
Impact factor: 0.927 (2013). Subjects: Ophthalmology and vision science.
Indian Journal of Orthopaedics
Impact factor: 0.624 (2013). Subjects: Orthopaedics, and traumatology.
Indian Journal of Pathologists and Microbiologists
Impact factor: 0.642 (2013). Subjects: Morbid anatomy, pathology, cytology, hematology, and medical microbiology.
Indian Journal of Pharmacology
Impact factor: 0.679 (2013). Subjects: Clinical and experimental pharmacology.
International Braz J Urol: official journal of the Brazilian Society of Urology
Impact factor: 0.742. Subjects: Urology.
International Journal of Shoulder Surgery
Impact factor: 0.513 (2013). Subjects: Basic science, diagnostic and therapeutic aspects of disorders of the shoulder girdle.
Iranian Journal of Kidney Diseases
Impact factor: 0.94. Subjects: .
Iranian Journal of Neurology
Impact factor: . Subjects: .
Iranian Journal of Pharmaceutical Research
Impact factor: 0.540. Subjects: Pharmacy, materia medica, medicine (General), and health sciences.
Jornal de Pediatria
Impact factor: 1.154. Subjects: Various areas in the field of pediatrics.
Journal of Anthropological Sciences
Impact factor: 1.798. Subjects: All aspects of evolutionary anthropology.
Journal of Applied Oral Science
Impact factor: 0.797. Subjects: .
Journal of Biomedical Science
Impact factor: 2.46. Subject: All fundamental and molecular aspects of basic medical sciences.
Journal of Cancer Research and Therapeutics
Impact factor: 0.761. Subjects: Basic and clinical sciences in oncology including radiation oncology.
Journal of Cytology
Impact factor: 0.413 (2013). Subjects: All aspects of diagnostic cytology, including fine needle aspiration cytology, gynecological and non-gynecological cytology.
Journal of Gastrointestinal and Liver Diseases
Impact factor: 1.849 (2013). Subject: Gastroenterology and hepatology.
Journal of Headache and Pain
Impact factor: 2.779. Subject: Pathology.
Journal of Health, Population and Nutrition
Impact factor: 1.12. Subject: Preference is given to articles dealing with issues of developing countries.
Journal of Medical Biochemistry
Impact factor: 1.084. Subjects: .
Journal of Minimal Access Surgery
Impact factor: 1.374 (2013). Subjects: Minimal access surgery.
Journal of Musculoskeletal and Neuronal Interactions
Impact factor: 2.45. Subject: Pathophysiology and treatment of musculoskeletal disorders.
Journal of Nutritional Science and Vitaminology
Impact factor: 0.992. Subjects: All branches of nutritional science, food science and vitaminology.
Journal of Occupational Health
Impact factor: 1.55. Subject: Internal medicine.
Journal of Pharmacological Science
Impact factor: 2.08. Subject: Therapeutics.
Journal of Physiotherapy
Impact factor: 4.00. Subjects: Physiotherapy.
Journal of Postgraduate Medicine
Impact factor: 1.589. Subjects: Clinical medicine, surgery, pharmaceutical and basic medical sciences with emphasis on health problems and solutions relating to clinicians.
Journal of Visceral Surgery
Impact factor: 1.167. Subjects: .
Malaysian Journal of Nutrition
Impact factor: 0.00. Subjects: Nutrition.
MEMORIAS
Impact factor: 1.363. Subjects: .
Muscle, Ligament and Tendons Journal
Impact factor: 0.00. Subjects: All aspects of clinical and basic research studies related to musculoskeletal, ligament, tendon, public health, exercise physiology and kinesiology issues.
Neurology India
Impact factor: 1.084 (2013). Subjects: Neurology, neurosurgery, neuropsychiatry, neuropathology, neuro-oncology, and neuro-pharmaceutics.
Noise and Health
Impact factor: 1.430 (2013). Subjects: Auditory and non-auditory effects of occupational, environmental, and leisure noise.
Pharmacognosy Magazine
Impact factor: 1.159 (2013). Subjects: Medicinal plant research and development.
Preventing Chronic Disease
Impact factor: 1.585. Subject: Chronic disease prevention.
Puerto Rico Health Sciences Journal
Impact factor: 0.667. Subject: The scope of the journal includes a range of medical, dental, public health, pharmaceutical and biosocial sciences research.
Psychiatria Danubina
Impact factor: 0.633. Subjects: Psychiatry.
São Paulo Medical Journal
Impact factor: 0.588. Subjects: Clinical health science (internal medicine, gynecology and obstetrics, mental health, surgery, pediatrics and public health).
Saudi Journal of Gastroenterology
Impact factor: 1.221 (2013). Subjects: All aspects of digestive diseases, including the prevention, diagnosis and management and related genetics, pathophysiology, and epidemiology as relevant to gastrointestinal and hepatobiliary disorders.
Saudi Journal of Kidney Diseases and Transplantation
Impact factor: 0.00. Subjects: Kidney diseases, urinary tract, renal replacement therapies, and transplantation.
Scandinavian Journal of Surgery
Impact factor: 1.169. Subjects: .
Texas Heart Institute Journal
Impact factor: 0.674. Subjects: Cardiovascular diseases.
Translational Gastroenterology and Hepatology
Subjects: Gastroenterology and hepatology.
Urology Journal
Impact factor: 0.56. Subjects: Urology and nephrology.
Detailed steps to publish journal articles:
/in Expert Research Service, Proofreading Material /by support serviceFor those who publish a paper for the first time, they don’t know what materials need to be prepared, how to publish it, and they don’t know where to start. In fact, publishing a paper is very simple, it only takes a few simple steps, I believe you will understand soon.
What is regression?
/in Expert Research Service /by support serviceConcept
Regression analysis is a mathematical model. When the dependent variable and the independent variable have a linear relationship, it is a special linear model.
The simplest case is one- variable linear regression , which consists of an independent variable and a dependent variable that are roughly linearly related; the model is Y=a+bX+ε (X is the independent variable, Y is the dependent variable, and ε is the random error ) .
It is usually assumed that the mean value of random error is 0, and the variance is σ^2 (σ^2﹥0, σ^2 has nothing to do with the value of X). If it is further assumed that random errors follow a normal distribution , it is called a normal linear model. Generally, if there are k independent variables and 1 dependent variable, the value of the dependent variable is divided into two parts: one part is affected by the independent variable, that is, expressed as its function, the function form is known and contains unknown parameters; the other part is Other unconsidered factors and random influence, namely random error.
When the function is a linear function with unknown parameters, it is called a linear regression analysis model; when the function is a nonlinear function with unknown parameters , it is called a nonlinear regression analysis model. When the number of independent variables is greater than 1, it is called multiple regression, and when the number of dependent variables is greater than 1, it is called multiple regression.
Regression analysis content
The main contents of regression analysis are as follows:
① Starting from a set of data, determine the quantitative relationship between certain variables; that is, establish a mathematical model and estimate unknown parameters. Usually the least square method is used .
②Test the trustworthiness of these relations.
③In the relationship between multiple independent variables affecting one dependent variable, judge whether the independent variable’s influence is significant, and select the significant influence into the model, and eliminate the insignificant variables. Stepwise regression , forward regression and backward regression are usually used .
④ Predict or control a certain process by using the required relationship.
The application of regression analysis is very extensive, and the use of statistical software packages can make various algorithms more convenient.
Regression type
The main types of regression are: linear regression, curvilinear regression, binary logistic regression, and multiple logistic regression.
Types of Data analysis
/in Expert Research Service /by support serviceIn the field of statistics , some people divide data analysis into descriptive statistical analysis, exploratory data analysis, and confirmatory data analysis; among them, exploratory data analysis focuses on discovering new features in the data, while confirmatory data analysis is Focus on the verification or falsification of existing assumptions.
Exploratory data analysis
Exploratory data analysis refers to a method of analyzing data in order to form a worthy hypothesis test, which is a supplement to traditional statistical hypothesis testing methods. This method is named by the famous American statistician John Tukey.
Qualitative data analysis
Qualitative data analysis, also known as “qualitative data analysis”, “qualitative research” or “qualitative research data analysis”, refers to the analysis of non-numerical data (or data) such as words, photos, and observations.
Offline data analysis
Offline data analysis is used for more complex and time-consuming data analysis and processing. It is generally built on cloud computing platforms, such as the open source HDFS file system and MapReduce computing framework. The Hadoop cluster consists of hundreds or even thousands of servers, storing several petabytes or even dozens of petabytes of data. Thousands of offline data analysis jobs are running every day, and each job handles hundreds of MB to hundreds of TB or more. The running time is minutes, hours, days or even longer.
Online data analysis
Online data analysis is also called online analysis and processing , which is used to process users’ online requests. It requires relatively high response time (usually no more than a few seconds). Compared with offline data analysis, online data analysis can process user requests in real time, allowing users to change the constraints and restrictions of analysis at any time. Compared with offline data analysis, the amount of data that can be processed by online data analysis is much smaller, but with the development of technology, current online analysis systems have been able to process tens of millions or even hundreds of millions of records in real time. The traditional online data analysis system is built on a data warehouse with a relational database as the core, while the online big data analysis system is built on the NoSQL system of the cloud-computing platform. If there is no online analysis and processing of big data, there will be no way to store and index a huge number of Internet webpages, there will not be today’s efficient search engines, nor will there be microblogs, blogs, and social networks based on big data processing. And so on.
What are the impact factors of academic journals and what are the determining factors?
/in Expert Research Service, Proofreading Material /by support serviceThe impact factor (IF) of journals is a quantitative indicator of the influence of journals. That is an average of each published papers are cited number, it is actually published in a certain number of times a year all of the source is cited journal published two years ago in the journal, with the previous two years the number of journal papers published full source Ratio.
Impact factor is not the most objective criterion for evaluating the influence of journals. Generally speaking, the higher the impact factor, the greater the influence of the journal.
For some comprehensive or major research fields, the citation rate is relatively high because of the wide range of research fields. For example, journals of biology and chemistry are generally more likely to have a higher influence.
Although the impact factor can characterize the academic quality to a certain extent, the relationship between the impact factor and academic quality is not linearly proportional . For example, it cannot be said that a journal with an impact factor of 5.0 is definitely better than a journal with an impact factor of 2.0. It does not have the function of accurately and quantitatively evaluating academic quality.
Some domestic scientific research institutions often use cumulative impact factors or individual impact factors as quantitative standards when conducting research performance evaluations. Some researchers may not be promoted to titles or award bonuses due to a 0.1 point difference in impact factors. This approach is absolutely absolute Is not desirable.
From the calculation formula, although the impact factor is only directly related to the number of citations and the number of papers, in fact, it is closely related to many factors. There are five main factors that determine the size of the impact factor:
(1) Thesis factor . Such as the publication time lag of the paper, the length of the paper, the type and the number of collaborators, etc. Publications with a shorter publication time lag are easier to obtain a higher impact factor. If the publication period of the publication is long, a considerable part of the citations are not counted due to the aging of the literature (more than 2 years), that is, they are not involved in the calculation of the impact factor, thereby reducing the impact factor.
A large amount of statistical data shows that if the published paper is a hot topic, and the length of the paper is short and published quickly, the citation rate will quickly reach a peak, which will cause the impact factor of the journal to rise rapidly, and then rapidly decline; publish complete research papers The journals have been cited for a long time, and the impact factor has been increased for a long time. There are also data showing that the average number of authors of a paper is significantly positively correlated with the total citation frequency of the paper.
(2) Journal factors. Such as journal size (number of papers published), type, etc. When calculating the impact factor, the number of published papers only counts the number of papers, newsletters, and reviews, but does not count reviews, letters, newsletters, and other frequently cited articles. Based on empirical judgment, the number of journals published is closely related to the impact factor and the total frequency of citations.
In most cases, journals with a small number of papers are likely to get high impact factors, and the impact factors of these journals will fluctuate greatly from year to year; while journals with a large number of papers and a long history of publication tend to get higher Total citation frequency.
In addition, it is also closely related to other citation indicators such as: the annual index, the half-life of journal citations, the number of regional distribution, the ratio of funded papers, and the scope and circulation of journals. The size and structure of journals will cause different impact factors of journals. Generally speaking, the larger the scale of the same type of journals, the larger the impact factors of these journals in general; the more “hot” topics or “hot” professional articles contained in the journals, the more they are always cited. The higher the frequency, the greater the impact factor of such journals.
(3) Subject factors. For example, the number of journals in different disciplines, the average number of references, the half-life of citations, etc. will all have an impact on the journal’s impact factor and total citation frequency. The impact factor and total citation frequency of journals are based on the relationship between the citations of the paper and the number of citations.
The number of citations in a subject depends on two main factors: the first is the development characteristics of each subject; the second is the proportion of the journals of the subject in the source journals of the database. Generally speaking, the more source journals of a discipline, the greater the total citation frequency and impact factor of the discipline journal. These two factors determine the imbalance of the subject impact factor and the total citation frequency distribution.
In addition, the impact factor is also affected by the professional social coverage of the subject involved in the journal. If a sci-tech journal has a very small professional social coverage and there are few similar journals, then its impact factor is not It may be very high.
Because different disciplines have different internal scientific research rules, the situations in which the scientific research results of others need to be cited are different when doing research. These differences will affect the size of the impact factor in at least two aspects. On the one hand, the difference is how much other people’s work needs to be cited, and the other is the time of cite others’ work. Since the impact factor is generally calculated only based on the literature cited in the journals in the past two years, it can be seen that the ranking results based on the distribution of citation years in the past two years are also consistent with the ranking results of the journals by using the impact factor method. It also shows that the impact factor cannot correctly reflect the influence of journals in different disciplines.
Due to historical reasons, the construction and development of different disciplines in a country are not balanced, even in different branches of the same discipline. Some disciplines are small in scale, but there are many researchers engaged in this discipline, and the capital investment in this discipline is also large, and there are more related discipline magazines, which will form a scale advantage. And often those smaller-scale disciplines do not have this scale advantage, so the impact factor and total citation frequency of such journals will not be high.
In terms of the development speed of the subject scale, different subjects are divided into “cold” and “hot”. “Hot” subjects have developed rapidly due to the needs of the times. Articles of this subject will have a high citation rate during the period of rapid development of their scale; while “unpopular” subjects are just the opposite. However, this distinction between “cold” and “hot” is often not due to the development needs of science itself, but is often caused by economic, social and other non-scientific factors.
There are also some disciplines that contain many popular topics. Although these “hot” topics have high citation rates, they do not have much scientific value. According to the above analysis, it can be considered that this kind of difference in the citation rate of papers caused only by the size of the subject and the speed of development, or the difference in the size of the impact factors of related journals and institutions, resulting in the importance of The difference in ranking is not caused by the development of the scientific wooden body, but by some other economic, historical and social non-scientific factors. Therefore, this kind of evaluation of small-scale or “cold” major disciplines is extremely What is unfair is also unreasonable.
(4) Retrieval system factors , Such as the sources of journals participating in the statistics, the statistical scope of citation entries, etc. For a specific publication, in the retrieval systems of China and foreign countries, due to the large differences in the composition of the journal groups included in it, the calculated impact factor values are quite different, and the same publication has a large difference in the retrieval systems of different languages. Significantly different impact factors and total citations.
(5) The influence of celebrity effect . Celebrity effect is often manifested as: On the one hand, people often cite celebrity articles to increase the authority of their articles, even when there are other documents that are more suitable for their articles; On the one hand, articles signed with celebrity names or articles recommended by celebrities are easily published in so-called high-end magazines, and are therefore easily included in SCI or CSCD. Sometimes the articles do not have celebrity scientific research results, but in order to be able to The names of celebrities are signed in the publications, so excessive emphasis on the citation or inclusion situation will bring artificial bias to the total citation frequency and impact factor of the article.
Chinese Universities Agency number for Chinese government scholarship
/in Chinese Government Scholarship, Scholarships /by support serviceChinese Universities Agency Numbers list:
Chinese Universities Without Application Fee For CSC 2021
/in Chinese Government Scholarship, Scholarships /by support servicePolicies can be changed each year. For further inquiries directly contact to iso.
ANSO international awards for Young Talents in China
/in Chinese Government Scholarship, Scholarships /by support serviceBrief Description
Organization: Alliance of International Science Organizations (ANSO)
Course Level: Master and PhD
Award: RMB 6000
Access Mode: Online
Number of Awards: Up to 500
Nationality: International
The award can be taken in China
Eligibility
Eligible Countries: International students (non-Chinese citizens) are eligible to apply for the grant.
Acceptable Course or Subjects: Master 207and PhD degree will be awarded in any subject offered by the university
Admissible Criteria: To be eligible, the applicants must meet all the following criteria:
Not hold Chinese citizenship
Be proficient in English or Chinese
For master’s program applicants: be born after 1 January 1991 (inclusive)
For PhD program applicants: be born after 1 January 1986 (inclusive)
Meet the admission criteria for international students of USTC/UCAS
Not take up other assignments during the period of his/her scholarship.
http://www.fellowship.cas.cn/dms/aonline/1958.jhtml?fbclid=IwAR04FzGNn-mdet7mpAaEAWtLJvuhJY4gD1tv-qAcblKhjlLaQEIGSME3YkA