With the promotion of standard upgrading of urban sewage treatment in China, enhanced biological nitrogen and phosphorus removal technology has been widely used, in which low-carbon and high-efficiency biofilm denitrification technology has attracted much attention, but due to the great fluctuation of urban sewage quality, low carbon-nitrogen ratio and other reasons, most biofilm treatment projects have poor biofilm effect and need to supplement a large number of carbon sources. In this study, the enhanced coupling double membrane internal circulation treatment process of polyurethane new biological suspension fillers was used to treat urban sewage in Xingbin District of Laibin City. The engineering practice shows that the coupling new fillers can improve the anti-impact load capacity of the treatment system and improve the removal efficiency of COD and TN. The COD removal rate of Chengxiang town sewage increased from 87.00% to 91.00% respectively, and the effluent quality was more stable; the TN removal rate increased from 50.13% to 62.49% TN removal rate significantly; the effluent quality of Mengcun town treatment station was also better,and the COD, ammonia nitrogen and TN of the two places were stable up to grade A of "Pollutant Discharge Standard of Urban Sewage Treatment Plant".
道路基础工程在我国社会经济建设中发挥重要作用,其是我国当前所取得成就的重要基础支撑.因此,国家对路桥工程建设重视程度较高,人力、物力资源投入力度较大,钻孔灌注桩施工技术作为路桥施工常用的施工技术之一,也得到了广泛的运用.基于此,文章将结合实际案例,对桥梁工程施工中钻孔灌注桩施工技术应用要点进行分析,为相关工程建设提供必要参考.
文章介绍了JDBC在程序开发中的实现步骤,阐述了原生JDBC在开发过程中存在的问题.以问题为导向,从数据库连接、数据库操作两方面入手,详细介绍了数据库驱动注册、数据库配置信息加载、数据库连接创建及释放、数据库CRUD操作等产生问题的原因,给出了解决数据库连接和操作的优化方案.经验证,优化方案能够有效解决驱动重复注册、配置信息不灵活、操作效率低、CRUD大量冗余代码等问题.最后,介绍了DBCP、C3P0、Druid、DBUtils、JdbcTemplate等开发中用于数据库连接和操作的类库,为开发人员进行JDBC优化提供参考.
目的:了解健康服务与管理专业学生临床见习带教教师对学生临床见习的满意度,并分析其影响因素.方法:采用问卷调查法对江西中医药大学健康服务与管理专业学生临床见习带教教师进行问卷调查.结果:带教教师对见习总体满意度为(4.44+0.37)分,其中见习形式及内容、学生学习态度、见习效果的满意度分别为(4.47±0.42)分、(4.55±0.45)分、(4.31±0.52)分.不同专业领域带教教师对学生学习态度、见习形式及内容的满意度差异具有统计学意义(P＜0.05).结论:带教教师对健康服务与管理专业学生临床见习满意度较好,其中带教教师所属专业领域是学生学习态度、见习形式及内容满意度的影响因素.
为协调推进新型工程教育,促进社会发展和产业变革,高等工程教育也需做出适当的改革."无机化学"是化学、环境、材料等相关专业的入门基础学科,与后续学习的其它专业课程紧密相关,"无机化学"的教学质量直接影响学生的学习热情,该课程的教学改革对落实高等工程教育的发展大有裨益.文章通过对高校"无机化学"课程特点的剖析,针对目前存在的问题提出了一些改进措施,包括开展"线上线下"结合的教学模式、挖掘科技前沿知识、注重过程管理、采用多元化评价方式、引入课程思政教育、运用手持技术等.
