厌氧消化在城市生活污水处理中的应用及技术经济指标研究

本文就生活污水的厌氧处理常见装置的原理、性能进行了简要介绍，并通过省内现正在运行的几种化粪池的处理效果和国外粪便污水处理装置试验结果比较，来论证化粪池设计的主要参数确定原则，在保证污水有效处理的前提下，控制“无效”地容，以降低成本。     

区域空气监测网络建设策略与实践

根据区域空气质量管理的发展形势,提出建设区域空气自动监测网络的思路和建设内容,探索建立区域空气监测QA/QC技术体系的策略与解决方案。     

关于建立城市声环境自动监测系统的设想

文章以随机过程“各态历径”理论说明了“定点测量法”与“网格测量法”的内在联系 ,提出了以城市建成区内各类不同环境功能区为基础进行城市声环境自动监测系统监测点位布设的技术规范设想。     

论中国环境监测技术体系建设

论述了建设和完善环境监测技术体系的重要意义,分析了我国环境监测技术体系的发展现状及问题,提出了建设我国环境监测技术体系的构想。     

安全行驶与汽车技术状况的关系

汽车技术状况的好坏，与行车安全有着十分重要的关系，特别是转向装置和制动装置的技术状况影响最大。本文主要从转向装置、制动装置、车轮、行路机构、灯光信号等方面分析了安全行驶与汽车技术状况的关系，指出了事故预防的要点。     

西南地区生态文化旅游科技发展战略初探

西南地区旅游资源丰富多样,但经济发展水平相对落后.要实现西南地区经济社会的腾飞,必须实施生态文化旅游科技发展战略.在分析西南地区旅游资源特点的基础上,指出了旅游发展的战略目标及主要任务,并提出了相关建议.     

某铁路站区供热系统节能技术改造效果评估

针对某车站供暖成本升高和污染物排放等问题,从热源改造和建筑维护结构改造2个方面提出节能技术改造方案,通过对机组运行情况和围护结构改造情况的现场测试,得到节能技术改造效果良好的结论,并从节能效益、经济效益和环保效益3个方面对站区节能技术改造方案效果进行分析.     

胺萃取法处理含氰废水工艺的研究

对黄金选冶过程中排放的含氰废水用N₂₃₅作萃取剂从含氰废水中萃取铜、锌进行了研究,探讨了预处理有机相、温度条件、相比、平衡pH、相接触时间和萃取级数等因素对萃取的影响。试验结果表明,在选定的条件下,铜的萃取率达99%以上,从负载有机相中反萃铜,反萃率可达99%。同时还可以回收氰化物,根据试验结果,提出了处理含氰废水的工艺流程      

Effect of agricultural extension on cotton farmer's efficiency in arid and semi-arid areas of Burkina Faso

This study shows that farmers in arid and semi-arid land can improve their efficiency if they have access to agricultural extension services. An exhaustive survey was used to obtain data from 423 cotton producers in the arid zones and 144 of wetlands in Burkina Faso. The method of the directional distance function modeling a multi-output technology was used. The results show that cotton farmers in the arid zones are not technically more inefficient than those in wetlands. On average, arid zone producers have a technical inefficiency of 0.056 while that of wetland producers is around 0.052. The agricultural extension, defined as receiving visits and advice from technical agents, is important for producers because it helps farmers choose soil and water conservation techniques and fertilizers adapted to the Agro-climatic conditions of their respective zones. Agriculture extension also helps farmers of the arid zones to reduce their technical inefficiency by advising them to cultivate small agricultural plots. On average, in these zones, the size of an agricultural plot is around 1.03 ha compared to those of wetlands which is about 1.6 ha.     

Injury surveillance trends in career–technical education: New Jersey 1999–2018

Introduction: Adolescents engaging in school-sponsored work experiences may be at risk of injury due to factors such as inexperience. This article examines trends in 20 years of reported injuries among New Jersey (NJ) adolescents engaging in school-sponsored work experiences, and compares a transition from paper to online reporting format. Methods: New Jersey requires reporting of injuries occurring during school-sponsored work experiences to the NJ Department of Education. Injuries reported by NJ schools from 1999 to 2018 (n = 2,119) were examined; incidence rates for 2008 to 2018 (n = 743) were calculated using publicly available NJ Department of Education enrollment data for the denominator, including for specific groups of students: career and technical education; special healthcare needs. Results: A downward trend in reported injuries in NJ schools was observed. However, the year online reporting became required by code (2013), an increase of nearly 50% was seen from 2012 (59–89), followed by a decline in reported incidents 2014 to 2018 (mean = 65, range 76 down to 47). Injury rate trends over time paralleled those of reported incidents. Conclusions: This study suggested worker safety and public health benefits of improvements from State of NJ code required training programs and online injury surveillance report form. Practical Applications: One potential method to address the safety and health of adolescents engaging in work experiences is the use of online reporting forms, to aid in surveillance efforts, coupled with occupational safety and health training specifically geared toward teachers and administrators who both supervise young, relatively inexperienced and vulnerable workers and who make relatively frequent worksite visits. Incorporation of specific details of the instructions on the use of a reporting form into required trainings, in addition to providing a clear, accessible guidance manual online, could further help improve youth worker safety surveillance efforts.