摘要的详简度与编写要求

为了促进高校自然科学学报文前摘要编写的规范化和改善其被引用与被收录情况.对部分高校学报的摘要进行随机抽样调查。调查结果表明,摘要的写作普遍存在编写不规范、随意性大、详简度低等现象。其主要原因是作者、审者,尤其是编者不重视,有关标准、规范和教材对摘要的详简度要求不一致,学报的编辑质量评价体系关注不够等。提出更新观念、统一要求、重视评价、提高素质和增大详简度等措施,指出中文摘要以300字左右,一般不超过400字为宜。并对结构式摘要与传统式摘要进行比较.指出结构式摘要的编写形式符合摘要四要素的要求,是传统摘要的格式化

落实主编岗位责任制把好科技期刊质量关

指出执行科技期刊主编岗位责任制的重要性,并提出落实主编岗位责任制,把好科技期刊质量关的主要举措:正确定位,精品战略,队伍建设(作者、审者、编者)

如何评价高校学报的经济效益和社会效益

高校学报不仅有社会效益,也同样有经济效益。学报的经济效益应该是组稿、审稿、复审、编辑加工、排版印刷、发行及交换等一系列工作所产生的经济收益与这一过程所需的经济投入的代数和

Process Control of Integrated and Submerged Membrane Bioreactor

为维持一体式浸没膜生物反应器的稳定运行,采用由继电器、电磁阀和液位控制器等元件所构成自动控制装置,利用液面下降速率的快慢表征膜污染的状况,以液位控制器为核心,将MBR的进水、出水、液控、曝气和反冲5个系统联系为一个统一的整体,其中进水、出水和曝气分别为由时间继电器控制的周期性运行,定时开关各种泵类的运行,使各种泵都有足够的时间散热和停息。2个月的运行实验表明:MBR在该自控装置调控下运行时,反应体系中基本的物化参数,如混合液体积(L)和膜出水通量(m~3/m~2·d)等参数随时间的波动基本符合生化反应所需要的稳定性,同时对各种泵类起到了良好的保护作用In order to obtain a stable performance of Membrane Bioreactor ( MBR) in a long period of operation, an process controller, consisting of time relays, electromagnetic valves, and liquid level controller assembled into an integrated system, was designed for controlling influent, effluent and liquid level, aeration and backwashing. The pumps used in influent, effluent and aeration were periodically operated at a certain interval of time on and off controlled by time relays to have enough time to rest. There are two functions in liquid level controller; one is to balance the influent and effluent approximately to equal by turning on and off the feeding pump; and the other is to startup the backwashing system to eliminate cake layer formed on the membrane surface when effluent rate decreased significantly. During two months operation of MBR in activated sludge process, this process controller showed high ability in controlling the parameters such as reaction volume and, flux of membrane.国家自然科学基金(20077023