PHP结合MySQL动态网页程序设计探讨

PHP与小型数据库MySQL配合使用,具有效率高、语法灵活的特点.     

Propagation of Oscillating Chemical Signals through Reaction Networks

Akin to electronic systems that can tune to and process signals of select frequencies, systems/networks of chemical reactions also “propagate” time‐varying concentration inputs in a frequency‐dependent manner. Whereas signals of low frequencies are transmitted, higher frequency inputs are dampened and converted into steady‐concentration outputs. Such behavior is observed in both idealized reaction chains as well as realistic signaling cascades, in the latter case explaining the experimentally observed responses of such cascades to input calcium oscillations. These and other results are supported by numerical simulations within the freely available Kinetix web application we developed to study chemical systems of arbitrary architectures, reaction kinetics, and boundary conditions.     

促进软件开放获取的策略研究

阐述了软件开放获取的定义和意义,介绍了软件开放获取的3种重要途径：自由软件、开源软件和免费软件,分析了当前存在的问题,提出了5种促进软件开放获取的措施。