介绍几种班组安全管理工作的方法

1.五问一答法五问一答法是适合班组安全管理的一种工作方法。针对具体问题五问:为什么,做什么,什么人,什么时候,什么地方。一答是怎么办,即采取的具体措施。例如,起吊一件重物,为预防挤伤事故,采取五问一答法:     

黄河三角洲开发建设对生态环境的影响与对策

本文简要叙述了黄河三角洲的成因及自然生态环境概况,详细论述了黄河三角洲开发建设对生态环境带来的问题及采取的有效措施,对三角洲的开发建设和生态环境的保护有着一定的指导意义。     

成渝经济区区域空间结构分析

区域空间结构的发展状况对区域经济的健康成长起着重要的影响,空间结构的合理与否直接影响到区域系统社会经济整体发展水平的提高与协调发展.作为跨区域的成渝经济区,它具有自身独特的区域空间结构.2007年成渝经济区被国家确定为重点开发区.随着重庆市和成都市被批准为全国统筹城乡综合配套改革试验区的实现,内陆首个保税港区在重庆的设立,成渝经济区有望成为中国第四增长极.利用区域空间结构理论、点轴系统理论等,借助地理信息系统空间分析方法,对成渝经济区区域统筹发展空间结构进行分析,确定了成渝经济区的核心范围和辐射范围,"两极三轴"空间发展战略格局.     

江西大余县荡坪钨矿尾矿区自然植物组成及其重金属富集特征

研究江西大余县荡坪国有钨矿尾砂库区自然植物组成分布及其重金属富集特征,旨在为今后矿区植被重建与植物修复重金属污染土壤提供科学依据。结果表明：库区共出现了20种植物,隶属15科20属,其中草本植物14种,木本植物6种;这些植物明显生长不良,且主要分布在库区湿润或有水出现的沙土地区。尾砂库区中,不同重金属含量在同一植物体内大小趋势为Zn>Pb>Cu>Cd。库区没有发现重金属的超富集植物,大部分为Cu、Pb、Zn、Cd的耐性植物。荡坪尾砂库区土壤Cd污染严重,木贼与蜈蚣草为Cd的避性植物,可用于库区Cd污染土壤的植被重建先锋物种;土荆芥与香附子为Cd的积累植物,可以用于库区Cd污染土壤的植物修复;其它植物为Cd的排斥植物,可用于库区Cd污染土壤的植物固化.     

河岸渗滤作用脱氮机理及其特点的试验

开展河岸渗滤作用脱氮功能研究对保证饮用水水质安全有重要意义。本文采用室内试验、现场试验及理论分析的方法,研究了河岸渗滤作用脱氮机理及特点。结果表明,河岸渗滤作用脱氮的主要动力是硝化与反硝化作用。河岸渗滤作用过程中先发生硝化作用,后发生反硝化作用,界面位于河床沉积层内,两者速率的匹配与提高,以及增加系统的尺度,可提高河岸渗滤作用的脱氮能力与效率。     

Response of the grain yield and quality of hybrid rice to weak light stress北大核心CSCD

In this study, three rice varieties, Byou268 (low light-sensitive type), Nei5you768 (intermediate type), and Yixiangyou1108 (low light-tolerant), were used as experimental materials to investigate the yield and quality responses of different rice varieties to low light stress under normal light (CK) and low light (SH). The results showed the following: (1) Compared with normal light, the decrease in Yixiangyou1108’s 1 000-grain weight, grain number per spike, and seed setting rate under low light treatment were much lower than those of Nei5you768 and Byou268. The yield decline of Yixiangyou1108 (46.5%) was significantly lower than that of Nei5you768 (56.5%) and Byou268 (69.8%). Yixiangyou1108 showed strong tolerance to low light stress in terms of 1 000-grain weight, seed setting rate, grain number per panicle, and yield. (2) Compared with normal light, the reduction in grain length and width of Yixiangyou1108 under low-light treatment was significantly greater than that of Byou268; however, the reduction in the length-width ratio did not reach a significant level. The amylose content and gel consistency of the rice were significantly reduced. The reduction in amylose content of Yixiangyou1108 (24.5%) was significantly lower than that of Nei5you768 (28.1%) and Byou268 (30.6%); however, the decrease in gel consistency of Yixiangyou1108 (14.7%) was significantly higher than that of Nei5you768 (9.8%) and Byou268 (8.1%). After low light treatment, the characteristic values of the RVA curve of rice changed. The peak viscosity and breakdown viscosity of Yixiangyou1108, Nei5you768, and Byou268 were significantly decreased, but the cold glue viscosity and setback viscosity were significantly increased, while there was no significant difference in the peak time and peak temperature. The response of 1 000-grain weight, grain number per spike, and seed setting rate under low light stress can be used as a yield index of rice breeding with low light tolerance; rice grain type, amylose, and gel consistency; and peak viscosity and hot paset viscosity in RVA characteristic values can be used as quality indexes of low-light-tolerant rice material breeding. © 2022 Science Press. All rights reserved.     

植物种和氮添加对元谋干热河谷草地土壤有机碳分解的影响

为了解植物生长和氮(N)添加对元谋干热河谷区草地土壤活性炭组分和惰性碳组分分解的影响,在元谋干热河谷典型燥红土上开展植物物种和氮添加实验,分析不同物种[扭黄茅Heteropogon contortus)、橘草(Cymbopogon goeringii)、孔颖草(Bothriochloa pertusa)、拟金茅(Eul...     

韶钢破碎车间实施“三同时”的内容和效益

广东省韶关钢铁厂破碎车间1992年7月建成投产,是执行“三同时”较好的工程项目。1 “三同时”是搞好安全管理的前提 破碎车间设计为年产60万t粉矿。按生产需要和南方多雨的特点,采用于、湿法生产工艺。 破碎车间的主要污染源为铁矿石破碎、筛分及运转过程中产生的粉尘。由于工程设     

走马汉城看交通

初到汉城时,走在街上总感到有些特别, 一时间又很难说清楚。几天过去,我终于明白过来:这里马路上跑的汽车,几乎都是韩国自己生产的。除了现代、大宇、启亚、双龙这些在国内街头随处可见的牌子以外,很难看到其它国家生产的汽车。经朋友一番解说才算略有所悟。