| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T119 |
0-37 |
Sentence |
denotes |
Exponential growth and detection rate |
| T120 |
38-113 |
Sentence |
denotes |
The observed F(x) fit the exponential model of Eq. 4 well with R2 = 0.9778. |
| T121 |
114-211 |
Sentence |
denotes |
The estimated α =1.1070, representing the first person who was infected and ignited the epidemic. |
| T122 |
212-266 |
Sentence |
denotes |
The estimated β =0.1716, representing the growth rate. |
| T123 |
267-359 |
Sentence |
denotes |
Using this estimated growth rate, it takes only 4 days for the diagnosed COVID-19 to double. |
| T124 |
360-514 |
Sentence |
denotes |
Figure 3 presents the daily detection rates, estimated with the fitted exponential model from day one of the epidemic to the last day of the study period. |
| T125 |
515-671 |
Sentence |
denotes |
Based on findings in this figure and data from Figs. 1 and 2, we divided the COVID-19 epidemic during the first two months of the epidemic into five phases. |
| T126 |
672-844 |
Sentence |
denotes |
Fig. 3 Estimated daily detection rate Pi of COVID-19 (2019-nCoV) infection before, during and after declaration of the outbreak, the first 2 months of the Epidemic in China |
| T127 |
845-885 |
Sentence |
denotes |
Phase 1 was from December 8 to 25, 2019. |
| T128 |
886-986 |
Sentence |
denotes |
During this period, the detection rate Pi was high overall, with fluctuations around and above 100%. |
| T129 |
987-1090 |
Sentence |
denotes |
This was corresponding to the early period after the first suspected case was identified and diagnosed. |
| T130 |
1091-1174 |
Sentence |
denotes |
Phase 2 was from December 26, 2019 to January 8, 2020, covering the New Year’s Day. |
| T131 |
1175-1303 |
Sentence |
denotes |
The detection rate Pi fluctuated at around 50% with the lowest of 17% on December 31, 2019 and the highest of 108% on January 8. |
| T132 |
1304-1466 |
Sentence |
denotes |
Phase 3 was from January 8 to 20, 2020, and it was featured with a progressive decline in the estimated Pi from 105% on January 8, 2020 to 1% on January 20, 2020. |
| T133 |
1467-1630 |
Sentence |
denotes |
This progressive declining period was the time for the Chinese to prepare for the traditional Chinese New Year’s with the longest and highest level of celebration. |
| T134 |
1631-1718 |
Sentence |
denotes |
Unfortunately, the COVID-19 as an outbreak was silently stepping in during this period. |
| T135 |
1719-1885 |
Sentence |
denotes |
Phase 4 was from January 20 to 27, 2020 with the estimated Pi increased from 1% on January 20, 2020 to surpass 100%, and reached the peak of 170% on January 27, 2020. |
| T136 |
1886-2052 |
Sentence |
denotes |
This period was corresponding to the initiation and progressive intensifying of the massive intervention organized and coordinated by the Central Government of China. |
| T137 |
2053-2203 |
Sentence |
denotes |
Phase 5 started from January 27, 2020 to the end of the study period, corresponding to the sustained massive national efforts, plus frequent emphases. |
| T138 |
2204-2440 |
Sentence |
denotes |
Different from the previous four phases, reductions in the estimated Pi during this phase were not an indication of under-detection but an indication of declines in the epidemic reflected by the detected and confirmed cases of COVID-19. |
| T139 |
2441-2550 |
Sentence |
denotes |
This is because the model predicted Pi did not consider any interventions but natural growth of the epidemic. |
| T140 |
2551-2565 |
Sentence |
denotes |
Based on Figs. |
| T141 |
2566-3110 |
Sentence |
denotes |
2 and 3 (Phase 4 and 5), three pieces of information can be derived: (1) The epidemic was highly sensitive to external interventions, supporting the nonlinear and chaotic characters revealed by the long latent period in the first three phases; (2) the massive national efforts were highly effective in detecting the detectable COVID-19; (3) signal for the COVID-19 in China to decline appeared on January 21 in 2020, 14 days before the start of eventual declines on February 4, as indicated by F ′ ′ (x) and F ′ (x) in Fig. 2 and Pi in Fig. 3. |
