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| 1 | An updated estimation of the risk of transmission of the novel coronavirus(2019-nCov)显示文摘The basic reproduction number of an infectious agent is the average number of infections one case can generate over the course of the infectious period,in a naïve,uninfected population.It is well-known that the estimation of this number may vary due to several methodological issues,including different assumptions and choice of parameters,utilized models,used datasets and estimation period.With the spreading of the novel coronavirus(2019-nCoV)infection,the reproduction number has been found to vary,reflecting the dynamics of transmission of the coronavirus outbreak as well as the case reporting rate.Due to significant variations in the control strategies,which have been changing over time,and thanks to the introduction of detection technologies that have been rapidly improved,enabling to shorten the time from infection/symptoms onset to diagnosis,leading to faster confirmation of the new coronavirus cases,our previous estimations on the transmission risk of the 2019-nCoV need to be revised.By using time-dependent contact and diagnose rates,we refit our previously proposed dynamics transmission model to the data available until January 29th,2020 and re-estimated the effective daily reproduction ratio that better quantifies the evolution of the interventions.We estimated when the effective daily reproduction ratio has fallen below 1 and when the epidemics will peak.Our updated findings suggest that the best measure is persistent and strict self-isolation.The epidemics will continue to grow,and can peak soon with the peak time depending highly on the public health interventions practically implemented. | Biao Tang Nicola Luigi Bragazzi Qian Li Sanyi Tang Yanni Xiao Jianhong Wu | 2020 | Infectious Disease Modelling2020，5，1： | 54 |
| 2 | Swarm intelligence optimization and its application in geophysical data inversion显示文摘复杂地球物理的数据的倒置总是解决多参数,非线性、多模式的优化问题。寻找最佳的倒置答案类似于当寻找食物时,在象鸟和蚂蚁那样的群观察的社会行为。在这篇文章,首先,粒子群优化算法详细被描述,并且蚂蚁殖民地算法改善了。然后,方法被用于地球物理的倒置问题的三种不同类型:(1 ) 对噪音敏感的一个线性问题,(2 ) 线性、非线性的问题的同步倒置,并且(3 ) 一个非线性的问题。结果验证他们的可行性和效率。与常规基因算法相比并且退火模仿,他们有更高的集中速度和精确性的优点。与伪相比 -- 牛顿方法和 Levenberg-Marquardt 方法,他们与克服局部地最佳的答案的能力更好工作。 | Yuan Sanyi Wang Shangxu Tian Nan | 2009 | Applied Geophysics2009，6，2： | 29 |
| 3 | THE EFFECTS OF TIMING OF PULSE SPRAYING AND RELEASING PERIODS ON DYNAMICS OF GENERALIZED PREDATOR-PREY MODEL显示文摘 | CHANGTONG LI SANYI TANG | 2012 | International Journal of Biomathematics2012，5，1： | 11 |
| 4 | A local f-x Cadzow method for noise reduction of seismic data obtained in complex formations显示文摘A noise-reduction method with sliding windows in the frequency-space (f-x) domain,called the local f-x Cadzow noise-reduction method,is presented in this paper.This method is based on the assumption that the signal in each window is linearly predictable in the spatial direction while the random noise is not.For each Toeplitz matrix constructed by constant frequency slice,a singular value decomposition (SVD) is applied to separate signal from noise.To avoid edge artifacts caused by zero percent overlap between windows and to remove more noise,an appropriate overlap is adopted.Besides flat and dipping events,this method can enhance curved and conflicting events.However,it is not suitable for seismic data that contains big spikes or null traces.It is also compared with the SVD,f-x deconvolution,and Cadzow method without windows.The comparison results show that the local Cadzow method performs well in removing random noise and preserving signal.In addition,a real data example proves that it is a potential noise-reduction technique for seismic data obtained in areas of complex formations. | Yuan Sanyi Wang Shangxu | 2011 | Petroleum Science2011，8，3： | 7 |
| 5 | PERMANENCE AND PERIODIC SOLUTION IN AN INTEGRODIFFERENTIAL SYSTEM WITH DISCRETE DIFFUSION显示文摘Dynamical characteristics of an integrodifferential modelling competitive sys-tem with diffusion are investigated.In particular,we derive sufficient conditions for the permanence of species,existence of an attracting periodic solution to the periodic system.The results of Wang Ke in 1994 and 1998 are improved and extended. | XIAO Yanni CHEN Lansun TANG Sanyi (Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China) | 2003 | Journal of Systems Science & Complexity2003，16，1： | 5 |
| 6 | Phase spectrum estimation of the seismic wavelet based on a criterion function显示文摘Phase spectrum estimation of the seismic wavelet is an important issue in high-resolution seismic data processing and interpretation. On the basis of two patterns of constant-phase rotation and root transform for wavelet phase spectrum variation, we introduce six sparse criteria, including Lu's improved kurtosis criterion, the parsimony criterion, exponential transform criterion, Sech criterion, Cauchy criterion, and the modified Cauchy criterion, to phase spectrum estimation of the seismic wavelet, obtaining an equivalent effect to the kurtosis criterion. Through numerical experiments, we find that when the reflectivity is not a sparse sequence, the estimated phase spectrum of the seismic wavelet based on the criterion function will deviate from the true value. In order to eliminate the influence of non-sparse reflectivity series in a single trace, we apply the method to the multi-trace seismogram, improving the accuracy of seismic wavelet phase spectrum estimation. | Yu Yongcai Wang Shangxu Yuan Sanyi Qi Pengfei | 2012 | Petroleum Science2012，9，2： | 4 |
| 7 | Threshold conditions for integrated pest management models with pesticides that have residual effects显示文摘 | Sanyi Tang Juhua Liang Yuanshun Tan Robert A. Cheke | 2013 | Journal of Mathematical Biology2013，，1： | 2 |
| 8 | Dynamics of infection with non-linear incidence in a simple vaccination model 显示文摘 | Xiao Yanni Tang Sanyi | 2010 | Non- linear Anal RWA2010，11，5： | 1 |
| 9 | Density -dependent birth rate, birth pulse and their population dynamic and consequences显示文摘 | Tang Sanyi Chen Lansun | 2002 | J Math boil2002，44，： | 1 |
| 10 | Global qualitative analysis for a ratio-dependent predator-prey model with delay显示文摘 | Tang sanyi Chen lansun | 2002 | J Math Anal Appl2002，266，： | 1 |
| 11 | Toluene-insoluble frac- tion from thermal cracking of Athabasca gas oil: Formation of a liquid-in oil emulsion that wets hydrophobic dispersed solids显示文摘 | Sanyi W Keng C Murray R G | 1998 | Fuel1998，77，14： | 1 |
| 12 | Design,Synthe- sis,and antimicrobial activity of 6 - O - substituted ketolides ac- tive against resistant respiratory tract pathugens显示文摘 | Yat Sun Or Richard F Clark Sanyi Wang | 2000 | J Med Chem2000，43，6： | 1 |
| 13 | Extinction an Persistence in Discrete Noncooperative Systems with Age-Structure and Diffusion 显示文摘 | Tang SanYi Xiao YanNi | 2001 | Mathematical and Computer Modelling2001，33，8： | 1 |
| 14 | Linearized Oscillations in Nonlinear Delay Difference Equations | Sanyi Tang Department of Computer and Mathematics,Hubei Institute for Nationalities,Enshi 445000,P.R.ChinaYanni Xiao Institute of Mathematics,Academia Sinica,Beijing 100080,P.R.China E-mail:xyn@math03.math.ac.cnJufang Chen Department of Mathematics,Shanxi Normal University,Xi’an 710062,P.R.China | 1999 | Acta Mathematica Sinica,English Series1999，15，4： | 1 |
| 15 | On line reactive power compensation schemes for unbalanced three phase four wire distribution feeders显示文摘 | LEE Sanyi | 1993 | IEEE Trans on Power Delivery1993，18，4： | 1 |
| 16 | State-dependent impulsive models of integrated pest management (IPM) strategies and their dynamic consequences显示文摘 | Sanyi Tang Robert A. Cheke | 2005 | Journal of Mathematical Biology2005，，3： | 1 |
| 17 | Integrated pest management models and their dynamical behaviour显示文摘 | Sanyi Tang Yanni Xiao Lansun Chen | 2005 | Bulletin of Mathematical Biology2005，67，1： | 1 |
| 18 | Density-dependent birth rate,birth pulses and their population dynamic consequences显示文摘 | Sanyi Tang Lansun Chen | 2002 | J Math Biol2002，44，： | 1 |
| 19 | Models for integrated pest control and their biological implications显示文摘 | Sanyi Tang Robert A. Cheke | 2008 | Mathematical Biosciences2008，，1： | 1 |
| 20 | Media coverage and hospital notifications: correlation analy-sis and optimal media impact duration to manage a pandemic 显示文摘 | YAN Qinling TANG Sanyi GABRIELE S | 2016 | J Theoret Biol2016，390，： | 1 |
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