Along with the social economy change for the better and the technical policy unceasing realization , its technical domain had the new change , the scientific research funds gradually becoming stable kas price ; the partial domains talented person appeared the backflow phenomenon ; the science and technology education integration strategy can carry out ; related legal appearing , the standard scientific research order , attenuated between the scientific research institution contradiction gradually 随着社会经济的好转和科技政策的不断落实,其科技领域有了新的变化,科研经费逐渐稳定;部分领域的人才出现了回流的现象;科教一体化战略得以落实;相关法律的出台,逐步规范了科研秩序,弱化了科研机构之间的矛盾。
When the municipal water supply network stops , the pressure of inlet disappears , first , second level check valves close , at the same time , because the conduit do not supply pressure to the lower cavity of diaphragm of drainage device , the valve flap of the drainage device opens under the force of spring , as well as the pressure between the first , second level check valves , to discharge off the backflow medium between the two check valves , so as to play the role of anti - pollution and isolation , even if the second level check valve occurs leakage , the backflow medium will also be discharged outside , and will not flow into the main network 当市政管网停水，进口压力消失，一、二级止回阀关闭，同时由于导管不再向排污器膜片下腔供给压力，排污器的阀瓣在弹簧力和一、二级止回阀间介质压力作用下而打开，把两止回阀间回流的介质排放掉，这样起到防污隔断作用，即使第二级止回阀出现内漏，回流的介质也会经排污器排到外面，而不会流进主管网。
In this paper , the basic and important parts are studied . for example , the capacity of jet fan in tunnel , the flux distribution and resistance loss in the chimney . this approach is capable of modeling multi - dimensional , time dependent nature of fire in a road tunnel , this paper presents the critical ventilation velocity in various heat release rate and smoke release rate for jingfu highway 以京福高速公路美菰林隧道的结构参数为依据，当隧道内发生火灾时，对隧道烟雾随时间的发展扩散过程进行了动态的模拟与研究，得出了不同的火灾放热率、发烟率的情况下，控制隧道烟雾回流的临界风速这一关键数据，为隧道突发火灾时的紧急通风控制提供参考。
On the other hand , the slow component of df is ascribed to the state qb - the next electron carrier of deoxidized side in ps ii . furthermore , we testified that the third component with lifetime much greater than the time of the registration period ( which is presented as a constant ) , is corresponds to the recombination of p680 + and the backward transport electron from ps i 延迟荧光的衰减动力学依赖于从q回流的电子( electron )与氧化态的p680 ~ + ，其中快相延迟荧光成份源于q _ a ~ -上电子回流与p680 ~ +的复合产生，慢相成份源于q _ b ~ =上电子的回流与p680 ~ +的复合产生。
