跟九州体育一样的网站

      <address id="t1vdd"></address>
    <sub id="t1vdd"><dfn id="t1vdd"></dfn></sub>
    <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

    <form id="t1vdd"><listing id="t1vdd"></listing></form>

    <address id="t1vdd"><listing id="t1vdd"></listing></address>

        <address id="t1vdd"></address>
      <address id="t1vdd"><dfn id="t1vdd"></dfn></address>

      <sub id="t1vdd"><dfn id="t1vdd"><ins id="t1vdd"></ins></dfn></sub>

      <sub id="t1vdd"><var id="t1vdd"><ins id="t1vdd"></ins></var></sub>
      <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

        <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

        <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>
          <address id="t1vdd"><listing id="t1vdd"><mark id="t1vdd"></mark></listing></address>

          <sub id="t1vdd"><dfn id="t1vdd"></dfn></sub>

          <address id="t1vdd"></address>

          <sub id="t1vdd"><var id="t1vdd"><mark id="t1vdd"></mark></var></sub>

            <sub id="t1vdd"><var id="t1vdd"><ins id="t1vdd"></ins></var></sub>

              <address id="t1vdd"><listing id="t1vdd"><menuitem id="t1vdd"></menuitem></listing></address>

              <thead id="t1vdd"><var id="t1vdd"><output id="t1vdd"></output></var></thead>

                    Threshold Dynamics in an SEIRS Model with Latency and Temporary Immunity

                    Publisher:信息发布员Date:2019-12-09Views:10

                    Speaker: Professor Yuan Yuan, from Memorial University of Newfoundland

                    Place: Room 332, No. 3 Building

                    Time: December 20th, 2019, 10:00 am

                      

                    Introduction: A disease transmission model of SEIRS type with distributed delays in latent and temporary immune periods is discussed. With general/particular probability distributions in both of these periods, we address the threshold property of the basic reproduction number R0 and the dynamical properties of the disease-free/endemic equilibrium points present in the model. More speci?cally, we 1). Show the dependence of R0 on the probability distribution in the latent period and the independence of R0 from the distribution of the temporary immunity, 2). Prove that the disease-free equilibrium is always globally asymptotically stable when R0 < 1, and 3). According to the choice of probability functions in the latent and temporary immune periods, establish that the disease always persists when R0 > 1 and an endemic equilibrium exists with di?erent stability properties. In particular, the endemic steady state is at least locally asymptotically stable if the probability distribution in the temporary immunity is a decreasing exponential function when the duration of the latency stage is ?xed or exponentially decreasing. It may become oscillatory under certain conditions when there exists a constant delay in the temporary immunity period. Numerical simulations are given to verify the theoretical predictions.

                     

                        <address id="t1vdd"></address>
                      <sub id="t1vdd"><dfn id="t1vdd"></dfn></sub>
                      <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

                      <form id="t1vdd"><listing id="t1vdd"></listing></form>

                      <address id="t1vdd"><listing id="t1vdd"></listing></address>

                          <address id="t1vdd"></address>
                        <address id="t1vdd"><dfn id="t1vdd"></dfn></address>

                        <sub id="t1vdd"><dfn id="t1vdd"><ins id="t1vdd"></ins></dfn></sub>

                        <sub id="t1vdd"><var id="t1vdd"><ins id="t1vdd"></ins></var></sub>
                        <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

                          <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>

                          <sub id="t1vdd"><dfn id="t1vdd"><mark id="t1vdd"></mark></dfn></sub>
                            <address id="t1vdd"><listing id="t1vdd"><mark id="t1vdd"></mark></listing></address>

                            <sub id="t1vdd"><dfn id="t1vdd"></dfn></sub>

                            <address id="t1vdd"></address>

                            <sub id="t1vdd"><var id="t1vdd"><mark id="t1vdd"></mark></var></sub>

                              <sub id="t1vdd"><var id="t1vdd"><ins id="t1vdd"></ins></var></sub>

                                <address id="t1vdd"><listing id="t1vdd"><menuitem id="t1vdd"></menuitem></listing></address>

                                <thead id="t1vdd"><var id="t1vdd"><output id="t1vdd"></output></var></thead>

                                      9ovs即时比分

                                      澳门星际在线娱乐场88

                                      澳门葡京赌场官方网

                                      乐彩欢迎你

                                      皇冠投注比分

                                      90win比分足球

                                      千赢|国际老虎机手机版

                                      足球贴士推介

                                      乐彩网购彩平台