广西大厂锡多金属矿床研究进展

大厂锡多金属矿床是世界闻名的超大型矿床,笔者从构造控矿、同位素测年、流体包裹体、成矿物质来源及同生沉积成矿等五个方面综述了近半个世纪来该矿床的一些研究进展,并结合近年来野外调查研究,认为大厂锡多金属矿床属后生成因,成岩、成矿是燕山晚期同一构造-热事件的产物,成矿过程中有幔源流体的显著参与,矿体产出形态的空间变化受不同深度的构造特征所控制。     

滇东断陷盆地南洞岩溶地下水系统地下河水文动态特征与资源量评价

本文对滇东断陷盆地南洞岩溶地下水系统各地下河的水文动态特征进行了分析,推断了南洞岩溶地下水系统的结构特征.根据岩性构造、地下河发育以及补径排关系,将其划分为四个子系统.分别采用降雨入渗系数法和径流模数法对南洞岩溶地下水系统的天然资源量进行计算,计算结果分别为35610.7万m3/a和33460.2万m3/a.用枯季径流...     

Monitoring salmon aquaculture waste: The contribution of First Nations’ rights, knowledge, and practices in British Columbia, Canada

British Columbia's current approach to monitoring salmon aquaculture waste is disconnected from political and legal trends towards the recognition of Aboriginal rights in Canada. Drawing on insights from collaborative monitoring in northern Canada and interviews with 23 Kwakwaka’wakw clam-diggers and cultural specialists (2006–2007), preliminary directions for integrating First Nations’ values, knowledge and stewardship practices into marine environmental monitoring are identified. Kwakwaka’wakw monitoring practices include the use of qualitative individual, community and population scale indicators and the integration of traditional knowledge as baseline data about the healthy conditions of traditional food resources.     

The Marine Planning Framework for South Australia: A new ecosystem-based zoning policy for marine management

The Marine Planning Framework for South Australia is a new large-scale, ecosystem-based zoning policy for management of development and use in the marine environment. Utilising the Geographic Information System (GIS), the model establishes four ecologically rated zones, derived from known ecological criteria. A series of goals, objectives and strategies represent the desired outcomes for each of the ecologically rated zones. A Performance Assessment System (PAS) will subsequently evaluate the success of the marine plans. Implementation will be supported by a collaborative whole-of-government approach. Marine plans will facilitate the delivery of long-term protection to the marine environment as a whole ecosystem, whilst enabling a broad range of activities to occur in a sustainable manner.     

泰国虎纹蛙与中国虎纹蛙早期胚胎发育比较研究

比较了泰国虎纹蛙与中国虎纹蛙在控温条件下的胚胎发育过程。结果表明:两亚种蛙在右鳃封闭期与鳃盖完成期之间有明显的"角质颌出现"的特征,因而在传统分期的基础上增加了一个"角质颌出现期",从而将两者自受精卵开始到鳃盖完成期为止划分为26个时期;两亚种蛙大部分发育时期外形特征基本相同,但八细胞期细胞的排列方式,两亚种蛙神经褶期的神经沟形状、纤毛出现期的神经褶棱高度等均不同;泰国虎纹蛙的发育速度较快,自受精卵期到鳃盖完成期共耗时70.4h,中国虎纹蛙在相同的条件下则需92.5h,但在四细胞期、八细胞期、神经管期和尾芽期,泰国虎纹蛙的发育速度却较中国虎纹蛙慢。     

四川省上市公司可持续发展财务问题分析

财务指标是企业盈利能力的反映。根据近几年的相关数据,通过对财务指标综合分析,探讨四川省上市公司的可持续发展状况。     

AutoCAD二次开发在绘制管线竣工图中的应用

介绍了通过AutoCAD二次开发绘制管线竣工图的方法,阐述如何实现数据文件导入CAD,长度统计,信息要素导入等功能.     

New patterns of urban development in China

1　ＩＮＴＲＯＤＵＣＴＩＯＮＣｉｔｙｐｌａｙｓａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｔｈｅｐｒｏｃｅｓｓｏｆｒｅ ｇｉｏｎａｌｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔ .Ｆｏｒｉｎｓｔａｎｃｅ ,ｉｎ 1996,ｔｈｅｔｏｔａｌｍｕｎｉｃｉｐａｌａｒｅａｓｏｆ 666ｃｉｔｉｅｓｏｎｌｙｃｏｖｅｒｅｄｔｈｅｐｒｏｐｏｒｔｉｏｎｏｆ 18.12ｐｅｒｃｅｎｔｉｎｎａｔｉｏｎａｌｔｅｒｒｉｔｏｒｙ ,ａｎｄｂｕｉｌｔ ｕｐａｒｅａ 1.8ｐｅｒｃｅｎｔ .Ｂｕｔｔｈｅｙｐｒｏｄｕｃｅｄｔｈｅ 68.63ｐｅｒｃｅｎｔｏｆＧＤＰ(ＧｒｏｓｓＤｏ…     

经济全球化进程中推进我国西部经济的发展(上)

本文重点讨论了在经济全球化进程中我国西部经济的发展问题。较系统地分析了经济全球化与我国西部大开发的关系以及西部发展融入经济全球化进程的战略措施和利用亚欧大陆桥推进西部地区融入经济全球化的进程.