Petrochemical wastewater treatment with a pilot-scale bioaugmented biological treatment system

In solving the deterioration of biological treatment system treating petrochemical wastewater under low temperatures, bioaugmentation technology was adopted by delivering engineering bacteria into a pilot-scale two-stage anoxic-oxic (A/O) process based on previous lab-scale study. Experimental results showed that when the concentrations of COD and NH4 -N of the influent were 370~910 mg/L and 10~70 mg/L, the corresponding average concentrations of those of effluent were about 80 mg/L and 8 mg/L respectively, which was better than the Level I criteria of the Integrated Wastewater Discharge Standard (GB8978-1996). According to GC-MS analysis of the effluents from both the wastewater treatment plant (WWTP) and the pilot system, there were 68 kinds of persistent organic pollutants in the WWTP effluent, while there were only 32 in that of the pilot system. In addition, the amount of the organics in the effluent of the pilot system reduced by almost 50% compared to that of the WWTP. As a whole, after bioaugmentation, the organic removal efficiency of the wastewater treatment system obviously in- creased.     

农村教师大面积培训的成功实践

将社会公益价值与城乡教育均衡发展、与农村教师专业发展需求有效结合,北京市启动了“绿色耕耘”京郊义务教育骨干教师培训与发展行动,由此促生了教师培训的战略调整、战术创新、格局变化与管理跟进。本文通过农村教师大面积培训的实践验证与成果延伸,从理论与实践的结合上,阐述了“新农村、新教师、新培训”营造农村教师专业发展的和谐生态的经验。     

Non-formation of vacuum states for Navier-Stokes equations with density-dependent viscosity

We consider the Cauchy problem, free boundary problem and piston problem for one-dimensional compressible Navier-Stokes equations with density-dependent viscosity. Using the reduction to absurdity method, we prove that the weak solutions to these systems do not exhibit vacuum states, provided that no vacuum states are present initially. The essential re- quirements on the solutions are that the mass and energy of the fluid are locally integrable at each time, and the Lloc1-norm of the velocity gradient is locally integrable in time.     

从阜阳"毒奶粉"事件看我国食品安全监管的薄弱环节

阜阳“毒奶粉”事件暴露出了我国食品安全监管的薄弱环节,主要表现为:食品安全卫生立法严重滞后;弱势群体求偿困难;法制宣传力度弱、影响小;执法机制涣散,执法能力软弱;地方保护主义思想严重等。我国在食品安全监管方面应当采取以利益引导为主,强制管理为辅的方法,加大对违法者的打击力度,保护弱势群体利益,全面监管食品生产经营整体过程。     

高校模块化体验式教学模式应用研究——以《商务旅游理论与实践》课程为例

随着高校人才培养与社会需求不匹配矛盾加剧,模块化教学和体验式教学模式正广泛被应用于教学改革实践。《商务旅游理论与实践》作为会展经济与管理专业的核心基础课程,更应该强调其应用本质。     

以创新精神统领教育思想全面提高高等教育质量——学习《江泽民文选》心得体会

江泽民同志站在时代的高度对我国高等教育质量的提高做出了全面而深刻的论述,对于高校正确理解高等教育在科教兴国和人才兴国战略中的地位具有重要的指导意义。树立高等教育质量观,要求我们在思想上端正对高等教育在新时期的战略地位的认识,以高等教育的制度创新作为我国高等教育质量提高的基础性工程,以素质教育为本,全面推进我国高等教育从量到质的转变,使高等教育为全面建设小康社会和和谐社会的奋斗目标提供不竭的动力源泉。     

Application of FTAM in Global Roam Account System

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婴幼儿自传体记忆研究的现状及展望

自传体记忆一直以来都是记忆研究领域的热点,它与人的认知、情绪、人格、社会性发展等多方面有着密切联系。该综述对近年来自传体记忆研究的一些进展做了回顾,总结了自传体记忆的内容界定、研究方法及其发生发展和影响因素等方面新的研究成果,提出目前在这一领域研究上存在的不足与展望。     

名词化与说明文阅读

名词化与文体的正式程度成正相关.说明文作为一种正式的文体,突出特征是名词化的大量存在.本文通过对说明文特点及其中的名词化的分析,探讨名词化结构的理解对说明语篇阅读的影响.     

上海职业教育发展典型模式初探及其理论思考

本文拟通过探索上海的职业教育发展典型模式。分析经济较发达地区职业教育发展的成功范式．借助模式的探讨，研究经济发展较为成功的地区其职业教育发展的特征、优势和经验。