鄂尔多斯盆地中部油气聚集区带地球化学特征研究

鄂尔多斯盆地中部存在明显的、东西方向的地球化学异常区带,异常区带有异常范围大、强度高和分布有序等特征,是地下油气信息的反映。从化探烃类指标浓度变化、比值特征和三维荧光图谱特征等方面对异常进行了研究,并结合本区的构造特征和石油地质条件对异常的形成进行了分析,证实了化探异常的形成与盆地中部的大型东西向构造带和东西向气聚集区具有密切的关系,对天然气的勘探具有参考价值。     

自然和自然贡献情景模型研究综述

本文回顾了自然和自然贡献情景模型发展的背景、历史和内容,概括总结了自然和自然贡献情景模型的发展进程以及联合国生物多样性与生态系统服务政府间科学—政策平台(IPBES)情景模型的概念框架,讨论了自然和自然贡献情景模型存在的问题和发展方向。为了在全球层面解决现有综合集成模型存在的问题,根据地球表层建模基本定理和生态环境曲面建模基本定理,提出了具有中国原创特点的自然与自然贡献情景模型概念框架。     

Conflict in Common: Heritage-making in Cape York

The outstanding natural and cultural values of Cape York have been acknowledged for decades, but those decades have been characterised by deep conflict. Non-government organisation intervention in local politics has seen a forceful push for nominating some or all of the Cape York Peninsula as a World Heritage Site. We illuminate the authorised heritage discourse at work in heritage-making, and highlight contested issues of ownership, governance, authenticity, and value. These themes contribute to the possibility of marginalising the voices of local people who wish to contribute to heritage-making in Cape York. Politics infuses all aspects of heritage-making in Cape York, and the specific experiences on Cape York reflect larger political processes occurring in World Heritage discourse. The paper draws on interviews undertaken in May and June 2012.     

立式泵固有频率分析及隔振结构研究

本文应用自行开发的计算机程序,计算了几种立式泵的六个自由度的固有频率,数值计算的结果显示了立式泵的高度及其安装尺寸的变化与其固有频率之间的关系,并分析了不同安装尺寸的隔振效率。最后,为满足立式泵的隔振要求提出了新型的泵体机座设计。     

不同性味矿物药的特征元素组成

应用自适应模式识别的ＩＤ３方法，通过３０种和３６种矿物药模式，分别建立起矿物药的“性”与其溶出元素的种类及含量之间和矿物药的“味”与其溶出元素的种类及含量之间的一般关系．矿物药的性与Ｓｉ、Ｍｎ、Ａｌ、Ｓｒ的不同含量有关，矿物药的味与Ｃｕ、Ｆｅ、Ｍｎ、Ｃａ的不同含量有关．上述元素为决定矿物药性味的特征元素．     

珠江河口对外海潮波响应的固有频率研究——采用系统控制论方法

采用受控的自回归滑动平均模型(CARMA)分别研究了珠江河口洪、枯季对外海潮波响应的固有频率。枯季采用单输入单输出模型,洪季采用双输入单输出模型,通过验证、检验表明,模型(CARMA)可用于寻求复杂网河对外海潮波响应的固有频率,方法可靠,易操作。通过频率增益响应分析,发现枯季珠江河口的固有频率以浅水分潮频段为主,对应周期介于6~10.0 h之间,枯季固有频率未出现在全日潮波对应的频段。洪季珠江河口的固有频率也以浅水分潮频段为主,珠江河口对浅水分潮的系统增益响应幅值最大。固有频率接近浅水分潮频段的站点,枯季较洪季固有频率减小,对应周期延长。     

含水合物沉积物电阻率演化规律实验研究进展

电阻率对沉积物组成和微观结构具有极高敏感性,是反映水合物生成分解过程物性演化的重要参数。然而由于影响因素复杂,人们对电阻率随CH4水合物生成分解的演化规律仍不清楚。对含CH4水合物沉积物的电阻率实验研究进展进行了梳理,分析了电阻率的主要影响因素,总结了纯水、盐水、非饱和水等不同体系中水合物生成分解过程电阻率演化规律。研究认为,在纯水沉积物中,电阻率随着水合物的生成不断增大;在盐水沉积物中,成核阶段的排盐效应以及生长阶段的重结晶或Ostwald熟化现象都会导致沉积物电阻率的降低;对非饱和水沉积物,气体和水在重力、毛细管力作用下、孔隙溶液离子在渗透和扩散作用下,都对沉积物电阻率造成影响。基于上述分析,提出了水合物生成过程模型,探讨了电学特性实验研究未来发展方向,对水合物电学研究具有一定的参考意义。     

喀斯特山区火灾迹地自然与人工恢复效益

针对桂西北喀斯特山区森林火灾频繁、火灾迹地面积大，森林生态系统退化严重，选择该地区5种主要造林林种及造林方式和自然抛荒恢复模式，分析和评价了各种模式的生态系统结构和效益。结果表明，随着经营年限的增加，6种经营模式土壤肥力、生物生产力都明显提高；水土保持最好的是自然抛荒恢复，其次是人工竹林和人工油菜，较差的是人工马尾松和人工桉树；投资效益除自然抛荒模式外，最高的是人工油菜和人工木荷，其次为人工桉树和人工马尾松，较差的是人工竹林。     

GARDENS ARE US,WE ARE NATURE: TRANSCENDING ANTIQUITY AND MODERNITY*

ABSTRACT. The history of gardens and the history of humans are linked inextricably, especially in the context of environment. As people and their institutions have changed, so too have gardens. This brief essay illustrates some important aspects in the evolution of gardens, exploring three seemingly discrete, but actually interconnected, notions: the antiquity of gardens, combining archaeological data with ethnographic parallels; the role of gardens in the changing spatial manifestations of agriculture, from dump heaps to amber waves of grain; and the transformation of domestic space, the literal and figurative reconstruction of garden fences into house walls. Changes are discussed as inadvertent products, rather than as consequences of deliberate actions. Modern ideas about categorizing landscapes are challenged further. The nature/culture dualism is a myth even at the household scale, as is our traditional way of looking at the world.     

Biodiversity and conservation in the Tibetan Plateau

The Tibetan Plateau (Qinghai-Xizang Plateau) is a unique biogeographic region in the world, where various landscapes, altitudinal belts, alpine ecosystems, and endangered and endemic species have been developed. A total of 26 altitudinal belts, 28 spectra of altitudinal belts, 12,000 species of vascular plant, 5,000 species of epiphytes, 210 species of mammals, and 532 species of birds have been recorded. The plateau is also one of the centers of species formation and differentiation in the world To protect the biodiversity of the plateau, about 80 nature reserves have been designated, of which 45 are national or provincial, covering about 22% of the plateau area. Most of the nature reserves are distributed in the southeastern plateau. Recently, the Chinese government has initiated the “Natural Forests Protection Project of China,” mainly in the upper reaches of the Yangtze and Yellow rivers. “No logging” policies have been made and implemented for these areas.