The US Sate Department has always professed to be a "Judge of Human Rights in the World." Year upon year, it issues country-specific human rights reports, accusing more than 190 countries and regions, includ...The US Sate Department has always professed to be a "Judge of Human Rights in the World." Year upon year, it issues country-specific human rights reports, accusing more than 190 countries and regions, including China, of their human fights conditions. Yet it tums a blind eye to its own. It is just behind the "Statue of Liberty’" that hides serious infringements upon human rights.展开更多
COVID-19 virus has been spreading worldwide for more than a year.At present,the situation of the new crown pneumonia epidemic remains full of tension and uncertainty.It is of concern is that the worst outbreak in the ...COVID-19 virus has been spreading worldwide for more than a year.At present,the situation of the new crown pneumonia epidemic remains full of tension and uncertainty.It is of concern is that the worst outbreak in the world is in the United States.The total number of confirmed new cases of COVID-19 and the total number of new deaths in the United States have entered their second and third cyclical peaks since the White House announced the“Open America Again”guidelines on April 16,2020,and the start of the US presidential election season in August 2020.This paper combines the generalized exponential model(EXPM)with Chebyshev polynomials to develop a special generalized growth model(GGM)to predict the total number of daily new confirmed cases and the total number of new deaths in the United States for three periods under a 14-day sensitivity regression model.In this paper,the US epidemic is divided into three periods from early January 2020 to early January 2021,and three forecasts are made for the three periods.The first two prediction periods have already occurred and the predictions match well with known results,and the third period predicts that the total number of new confirmed cases of COVID-19 and the total number of new deaths in the United States will fall to a minimum level by next July,when the supply of COVID-19 vaccine has already begun.The results suggest that the“Open America Again”policy and the events of the 2020 US presidential election season have contributed to the worsening of the COVID-19 in the United States.展开更多
Purpose: In this contribution, we want to detect the document type profiles of the three prestigious journals Nature, Science, and Proceedings of the National Academy of Sciences of the United States(PNAS) with regard...Purpose: In this contribution, we want to detect the document type profiles of the three prestigious journals Nature, Science, and Proceedings of the National Academy of Sciences of the United States(PNAS) with regard to two levels: journal and country.Design/methodology/approach: Using relative values based on fractional counting, we investigate the distribution of publications across document types at both the journal and country level, and we use(cosine) document type profile similarity values to compare pairs of publication years within countries.Findings: Nature and Science mainly publish Editorial Material, Article, News Item and Letter, whereas the publications of PNAS are heavily concentrated on Article. The shares of Article for Nature and Science are decreasing slightly from 1999 to 2014, while the corresponding shares of Editorial Material are increasing. Most studied countries focus on Article and Letter in Nature, but on Letter in Science and PNAS. The document type profiles of some of the studied countries change to a relatively large extent over publication years.Research limitations: The main limitation of this research concerns the Web of Science classification of publications into document types. Since the analysis of the paper is based on document types of Web of Science, the classification in question is not free from errors, and the accuracy of the analysis might be affected.Practical implications: Results show that Nature and Science are quite diversified with regard to document types. In bibliometric assessments, where publications in Nature and Science play a role, other document types than Article and Review might therefore be taken into account. Originality/value: Results highlight the importance of other document types than Article and Review in Nature and Science. Large differences are also found when comparing the country document type profiles of the three journals with the corresponding profiles in all Web of Science journals.展开更多
文摘The US Sate Department has always professed to be a "Judge of Human Rights in the World." Year upon year, it issues country-specific human rights reports, accusing more than 190 countries and regions, including China, of their human fights conditions. Yet it tums a blind eye to its own. It is just behind the "Statue of Liberty’" that hides serious infringements upon human rights.
文摘COVID-19 virus has been spreading worldwide for more than a year.At present,the situation of the new crown pneumonia epidemic remains full of tension and uncertainty.It is of concern is that the worst outbreak in the world is in the United States.The total number of confirmed new cases of COVID-19 and the total number of new deaths in the United States have entered their second and third cyclical peaks since the White House announced the“Open America Again”guidelines on April 16,2020,and the start of the US presidential election season in August 2020.This paper combines the generalized exponential model(EXPM)with Chebyshev polynomials to develop a special generalized growth model(GGM)to predict the total number of daily new confirmed cases and the total number of new deaths in the United States for three periods under a 14-day sensitivity regression model.In this paper,the US epidemic is divided into three periods from early January 2020 to early January 2021,and three forecasts are made for the three periods.The first two prediction periods have already occurred and the predictions match well with known results,and the third period predicts that the total number of new confirmed cases of COVID-19 and the total number of new deaths in the United States will fall to a minimum level by next July,when the supply of COVID-19 vaccine has already begun.The results suggest that the“Open America Again”policy and the events of the 2020 US presidential election season have contributed to the worsening of the COVID-19 in the United States.
基金supported by the National Natural Science Foundation of China(Grant No.:L1524037)
文摘Purpose: In this contribution, we want to detect the document type profiles of the three prestigious journals Nature, Science, and Proceedings of the National Academy of Sciences of the United States(PNAS) with regard to two levels: journal and country.Design/methodology/approach: Using relative values based on fractional counting, we investigate the distribution of publications across document types at both the journal and country level, and we use(cosine) document type profile similarity values to compare pairs of publication years within countries.Findings: Nature and Science mainly publish Editorial Material, Article, News Item and Letter, whereas the publications of PNAS are heavily concentrated on Article. The shares of Article for Nature and Science are decreasing slightly from 1999 to 2014, while the corresponding shares of Editorial Material are increasing. Most studied countries focus on Article and Letter in Nature, but on Letter in Science and PNAS. The document type profiles of some of the studied countries change to a relatively large extent over publication years.Research limitations: The main limitation of this research concerns the Web of Science classification of publications into document types. Since the analysis of the paper is based on document types of Web of Science, the classification in question is not free from errors, and the accuracy of the analysis might be affected.Practical implications: Results show that Nature and Science are quite diversified with regard to document types. In bibliometric assessments, where publications in Nature and Science play a role, other document types than Article and Review might therefore be taken into account. Originality/value: Results highlight the importance of other document types than Article and Review in Nature and Science. Large differences are also found when comparing the country document type profiles of the three journals with the corresponding profiles in all Web of Science journals.
