目标成本法在风力发电企业管理中的应用模式及实施策略

随着我国现代化进程的加快,市场环境竞争也越来越激烈,在这种大的环境趋势下,风力发电企业要想逆流而上,所面对的困难无疑是巨大的,在市场宏观经济的调控下,风力发电企业要明确市场发展目标,对市场环境有一个充足的了解,结合企业优势,通过合理的成本管理体系实现企业的降本增效。相关管理人员要从多个方面做好企业管理工作,采取多样化的措施提高企业内部管理效率。基于此,文章就对目标成本法在风力发电企业管理中的应用模式及实施策略进行了一个较为详细的概述。

Impact of atrazine and nitrogen fertilizers on the sorption of chlorotoluron in soil and model sorbents

Sorption of chlorotoluron in ammonium sulfate, urea and atrazine multi-solutes system was investigated by batch experiments. The results showed application of nitrogen fertilizers to the soil could affect the behavior of chlorotoluron. At the same concentration of N, sorption of chlorotoluron decreased as the concentration of atrazine increased on the day 0 and 6 in soil, respectively. The sorption of chlorotoluron increased from 0 to 6 d when soils were preincubated with deionized water, ammonium sulfate and urea solution for 6 d. That indicated incubation time was one of the most important factors for the sorption of chlorotoluron in nitrogen fertilizers treatments. The individual sorption isotherms of chlorotoluron in rubbery polymer and silica were strictly linear in single solute system, but there were competition sorption between pesticides or between pesticides and nitrogen fertilizers. That indicated the sorption taken place by concurrent solid-phase dissolution mechanism and sorption on the interface of water-organic matter or water-mineral matter.

环境水体中人工合成甜味剂的污染及检测方法研究进展

人工合成甜味剂是赋予或增加食品甜味的人工合成或半合成的用于代替蔗糖的有机物,广泛应用于食品、饮料、药物和个人护理品。研究表明,人工甜味剂广泛分布于地表水、地下水、海水和自来水中。目前普遍的观点认为,在规定剂量内使用人工合成甜味剂对人体是安全的。但是人工合成甜味剂作为新型有机污染物广泛出现在水中,引起了科学界的高度关注,因为人工合成甜味剂长期、低剂量暴露对人体的健康危害还没有结论。该文对近年来环境样品中人工合成甜味剂检测方法进行综述,并对未来发展趋势进行展望。