形容词 发表于 2025-3-23 11:21:48
Concluding Remarks,uld be added to make the models viable as bases for changing public policy include the age structure of the population, the difference in mortality rates between the first and subsequent vaccinations, and the different exposure risks to various population subgroups.尽责 发表于 2025-3-23 14:34:53
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ed using elementary tech niques. Since all that turns out to be necessary are ex pected values of random variables, the differential-differ ence equatlon descriptions of the stochastic processes are reduced to ordinary differential equations before being solved. Students who have studied stochastic process978-0-8176-3042-3978-1-4684-6719-2即席演说 发表于 2025-3-24 01:54:24
James C. Frauenthal .Lived Citizenship on the Edge of Society .will be of interest to students and scholars across a range of disciplines including social policy and social work. .978-3-319-85557-8978-3-319-55068-8Series ISSN 2947-6100 Series E-ISSN 2947-6119乞丐 发表于 2025-3-24 04:27:51
978-0-8176-3042-3Education Development Center, Inc. 1981冲击力 发表于 2025-3-24 07:07:39
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The Epidemic Initiation Model,ve arrives unnoticed and unknowingly transmits the disease to others; hence initially the epidemic grows out of control. Before too long, however, one or another of the infected individuals shows symptoms and is diagnosed as a carrier of smallpox. Once the disease is discovered, the initial phase of the epidemic is over.低能儿 发表于 2025-3-24 22:18:35
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