无限小的
3.Forsaking the conception of cause, mathematics seeks law, that is, properties common to all unknown, infinitesimal quantities.
4.England philosopher Alfred North Whitehead said:"however detailed you give the student,the detail is almost infinitely small.If he indeed meets the detail,he may have used what has forgot what you have taught him.The really helpful practice is to understand certain general principles,then there is a completely practice of the application of these principles in definite situation."
5.Abstract: On the basis of performances of the piezoelectric actuators and sensors,the characteristics of beam with highly distributed piezoelectric sensors and actuators and a feedback conditioning system are analyzed,and the dynamic differential equation is also derived.A finite element model of the intelligent beam has been formulated to derive the differential equation.Having obtained the basic theories of the intelligent beam,both the first mode and the second mode of the cantilever beam and the simple supported beam are analyzed and calculated to determine the appropriate criteria for placing the actuator.Characteristics related to the location for the actuator placement are also developed and illustrated.The choice of actuator location is on the assumption that the actuator and sensor have no length,so the location of actuator that has length is also studied.
6.The main purpose of this dissertation is to study the problems of symmetries and conserved quantities of controllable nonholonomic systems and mechanico-electrical dynamical systems, based on the invariance of the Hamilton action under the infinitesimal Lie group transformation.
7.Thus his realization extends from the infinitely small to the infinitely great, and from annu (the atom or speck) to atma (or spirit) his knowledge is perfected.
8.In other words, whether Alibaba, Baidu, Allyes, no one can refuse an unlimited extension of the regal point, Ali and her mother is a response to this market opening up new routes, and network CEO cornfield ants that Ali mother positioning can attack and defend, the main aim is Baidu, right Baidu Union is not a small impact.
9.Abstract:Selective mechanisms exist in organism and biosphere,which select the cells with less DNA injuy and reproduces them.There are two models;Mechanisms 1 and Mechanisms 2,represented respectively b bacteria and mechanolytes of human beings.Cells with Mechanisms 1(e.g. bacteria,generative cells,cancer cells)can reproduce infinitely,while somatic cells can not.There are deep-going reasons behind the two categories of selective mechanisms.The canceration of the cells is a degenerating process from Mechanisms 2 to Mechanisms 1.
