从《徐霞客游记》看明末南方的社会经济生活——纪念徐霞客逝世350周年

本文以《徐霞客游记》为依据,对明末南方的社会经济生活状况进行了初步归纳和分析,以揭示徐霞客对我国人文地理学的突出贡献。     

加强土地管理 促进新农村建设健康发展

党的十六届五中全会作出了建设社会主义新农村的重大决定,提出了建设“生产发展、生活宽裕、乡风文明、村容整洁、管理民主”的社会主义新农村的宏伟目标,这是以胡锦涛同志为总书记的党中央在新形势下统筹城乡协调发展的重大战略部署,这是提高广大农民群众生活质量、健康水平和文明素质的必由之路,是我国现代化进程中的重大历史任务。如何进一步加强土地管理工作,从我省人多地少的实际出发,更好地支持和服务于新农村建设,是摆在各级政府和国土资源部门面前的重大课题。为此,省国土资源厅成立了专题调研组,     

The Role of Fracture Structure in Leachate Pollution at Landfills： A Case Study of a Landfill in Chongqing City

This paper studies a landfill where there are three faults running through.As serious pollution has occurred to the geological environment,the landfill is to be closed up and renovated.The paper aims to explore the role of fracture structure in leachate pollution at the landfill.The research was carried out in several stages.First,mathematical models of the pre-renovation landfill with three faults running through and the landfill after renovation were established.And then,the boundary conditions and parameters of the two mathematical models were determined.The groundwater level of the landfills was simulated in order to modify the two mathematical models.As a result,a feasible mathematical model was achieved.Based on this model,a comparison was made of the COD concentration variations in the inside leachate and outside leachate between the two landfills. Accordingly,the impacts of the fracture structure on the pollution of leachate at the landfills could be identified.The study results show that while faults contribute to the migration of leachate,they also serve as a confluence of leachate,thus further deteriorating the environment.The COD concentrations of the inside leachate and the outside leacbate of the pre-renovation landfill are respectively 800 mg/L and 220 mg/L higher than those of the post.renovation landfill.Therefore,measures must be taken to handle the leachate seepage in areas where there are faults as well as the neighboring areas so as to get the environmental pollution under control.     

The Role of Fracture Structure in Leachate Pollution at Landfills: A Case Study of a Landfill in Chongqing City

This paper studies a landfill where there are three faults running through. As serious pollution has occurred to the geological environment, the landfill is to be closed up and renovated. The paper aims to explore the role of fracture structure in leachate pollution at the landfill. The research was carried out in several stages. First, mathematical models of the pre-renovation landfill with three faults running through and the landfill after renovation were established. And then, the boundary conditions and parameters of the two mathematical models were determined. The groundwater level of the landfills was simulated in order to modify the two mathematical models. As a result, a feasible mathematical model was achieved. Based on this model, a comparison was made of the COD concentration variations in the inside leachate and outside leachate between the two landfills. Accordingly, the impacts of the fracture structure on the pollution of leachate at the landfills could be identified. The study results show that while faults contribute to the migration of ieachate, they also serve as a confluence of leachate, thus further deteriorating the environment. The COD concentrations of the inside leachate and the outside leachate of the pre-renovation landfill are respectively 800 mg/L and 220 mg/L higher than those of the post-renovation landfill. Therefore, measures must be taken to handle the ieachate seepage in areas where there are faults as well as the neighboring areas so as to get the environmental pollution under control.     

瑞士：永久的中立国

瑞士是这样一个国家,它让我们忘却其每一位王公或首相,却无私地为各国处于危难之中的人士提供可靠的庇护,例如因针砭时弊被迫流亡的伏尔泰,出版了小说《爱弥儿》后受到政府通缉的卢梭,私生活屡遭攻击愤而出走的拜伦,为了爱情与女友私拜的雪莱,等等,前两位法国人生活在十八世纪,一位是作家中最有思想性的。一位是哲学家中最有文学气息的,     

滨海地区不同质地土壤对垃圾渗滤液中氨氮的吸附作用

为了探讨粉砂、粉质粘土、粉土对垃圾渗滤液中NH4+-N的吸附作用,在室内做了吸附实验,实验结果表明,三种土样吸附NH4+-N的等温吸附曲线均符合Langmuir模式,且最大吸附量分别为粉砂1.3 034 ms/g,粉质粘土1.109 mg/g,粉土0.3 439 mS/S.不同土样吸附NH4+-N的能力差异较大,三种土样的吸附顺序为:粉砂>粉质粘土>粉土;三种土样的迟滞因子分别为粉砂27.939,粉质粘土21.782,粉土18.257,说明粉砂和粉质粘土的防污能力较粉土强.     

基因决定你是否快乐

为什么你感到没有别人快乐？ 答案可能就在你的基因里。英国爱丁堡大学和澳大利亚昆士兰医学研究所的心理学家发现,一个人是否快乐决定于性格特征,而性格又在很大程度上取决于遗传因素以及他的生活环境。     

张开文化的翅膀——记我国改革开放大潮中独具魅力的测绘文化建设

胡锦涛总书记在党的十七大报告中强调：“当今时代,文化越来越成为民族凝聚力和创造力的重要源泉、越来越成为综合国力竞争的重要因素,丰富精神文化生活越来越成为我国人民的热切愿望。”改革开放30年来,我国测绘文化建设不断开创新局面．用实践充分证明了这一点。     

祝愿学校更上一层楼

2008年是国家改革开放30周年,也是郑州测绘学校建校30周年,郑州测校是伴随着国家改革开放的步伐成长的。在改革开放的大环境下,教育优先,投入不断加大,使郑州测校由小到大,由弱到强,发展成为测绘专业齐全,教学,生活设施完善,在校学生达4000余人的国家级重点中等专业学校,并成为河南全省教育系统先进集体和河南省文明学校,为全国测绘单位输送了大量的实用人才,     

滨海含水介质胶体对垃圾渗滤液氨氮的吸附特征

根据天津含水介质的结构和组成,选择代表性的2种含水介质,分析了土样和胶体的主要物理和化学性质,系统测定不同胶体对氨氮吸附的动力学曲线和吸附等温线,并分析了胶体粒径、ζ电位、电泳淌度对吸附作用的影响。结果表明,含水介质胶体对氨氮的吸附动力学过程为对数曲线,其平衡时间约为20~24 h;不同胶体的吸附等温线均为直线型理想吸附,并且当水相中氨氮浓度低于一定浓度时,不但不产生吸附,反而使胶体中的残留氨氮释放出来;胶体颗粒细,比表面积大,表面能大,吸附能力就越大;胶体的ζ电位和淌度愈高,胶体的稳定性愈大,与铵离子接触的机会多,容易吸附铵离子。