介孔二氧化硅/Nafion复合材料的制备及其酸催化性能的研究

以十六烷基三甲基溴化铵为模板剂,正硅酸四乙酯和Nafion在碱性条件下共缩合制备介孔二氧化硅/Na-fion复合材料,利用傅立叶红外光谱（FTIR）、热失重分析（TGA）、氮气吸附脱附等手段对复合材料进行了表征,并对其酸催化性能进行了研究。结果表明,复合材料具有较好的孔道有序结构,Nafion树脂被引入到介孔二氧化硅骨架中;作为固体酸催化剂,对苯甲醛和乙二醇的加成反应表现出了较高的酸催化性能。     

重型柴油机两级涡轮增压技术研究和探讨

两级涡轮增压技术能够显著提高柴油机的升功率,改善柴油机低速扭矩,降低排放和油耗,因此我们特从两级涡轮增压技术的原理、结构、特点和优势等几个方面展开了分析、研究和探讨,举例说明了国内外在两级涡轮增压技术方面的应用,并结合增压器开发实践指出了两级涡轮增压技术开发的过程和步骤。     

新型细菌纤维素基阻醇质子交换膜的制备及表征

以凝胶贴附法,在Nation膜两侧贴附细菌纤维素（BC）膜,制备出BC／Nation／BC夹心复合膜,以期结合Nation膜的良好导电性和BC膜的优秀阻醇性,制备新型阻醇质子交换膜。利用扫描电镜、热重分析对其形态结构和热稳定性进行研究,并对夹心膜的尺寸稳定性、质子传导率和甲醇渗透率进行表征。结果发现,复合膜的夹心结构紧密,热稳定性良好,尺寸稳定性比市售的Nation膜有很大改善,提高了43％。夹心膜的质子传导率随温度的升高明显上升,虽略低于Nation膜,但是甲醇渗透率明显降低一个数量级,阻醇性能得到了很大改善。组装成电池后,单电池开路电压达到922mV,最大发电功率密度为7．2mW／cm^2。该结果表明夹心复合膜作为新型质子交换膜应用于直接甲醇燃料电池中具有很大潜力。     

“土家羌音”的传承与融合——以咸丰麻柳溪村土家羌族村落规划为例

该文以咸丰麻柳溪村为例,以一个独具特色的湖北土家族地区羌族部落为研究对象,通过对麻柳溪村落现状问题的分析,在旅游开发的背景下,提出了民族文化在设计中传承与融合的新思路。并在对其重点地块规划设计中,探讨了土羌结合的设计手段,并总结和归纳出多民族文化在设计中传承与融合的具体方法。     

Uncertainty in biomass supply estimates: Lessons from a Yakama Nation case study

The increasing demand for bioenergy in the United States necessitates detailed case studies of cost and supply to assess its feasibility. We have developed supply curves based on six feedstocks in five counties surrounding the Yakama Nation in central Washington using spatially explicit estimates of supply and transportation cost. The supply curves were used to examine a base case supply for a bioenergy plant, to analyze the effects of land ownership, and examine the impacts of uncertainty in parameters used to determine cost and supply. The results show that existing industries produce the cheapest supply of feedstock as a byproduct of their operations, while supplies harvested specifically for bioenergy are considerably more expensive. Fragmented land ownerships lead to the necessity of cooperation between owners and highlight the importance of a strong anchor supply close to the plant. Lastly, uncertainty in supply and cost parameters leads to larger ranges in available biomass, leading to reluctant investment in large plants.     

民族复兴视野下的外国文学研究

通过历史观照发现,外国文学通过对中国现当代文学的影响,深刻地影响着中国现当代文学与现代国民思想。通过对外国文学研究的现状观照发现,外国文学研究的对象极其不平衡。通过历史与现实的双重观照,本文认为,在民族复兴视野下,通过加强民族文学交流,建构具有中国特色的外国文学史新范式是进行外国文学研究的有效途径。     

The True Counterfeits of Banksy: Radical Walls of Complicity and Subversion

Tattoo or consummate object of consumption? Banksy's artwork has an uneasy status. It simultaneously has the power to subvert, questioning the conventions of the art world while potentially colluding with it. Eva Branscome explores the paradox of Banksy in the light of Post-Modernism. Copyright © 2011 John Wiley & Sons, Ltd.     

The Victor Diamond Mine environmental assessment process: a critical First Nation perspective

Restrictive scoping has emerged as a contentious issue in environmental assessment (EA) with developments in northern Canada on Aboriginal territorial homelands. Restrictive scoping potentially leads to the exclusion of potentially affected stakeholders, constrained impact assessment, and inadequate collection of baseline information and traditional knowledge. The First Diamond Mine in Ontario, Canada, is located on the Attawapiskat River in the western James Bay region. We examined whether the scoping applied in the EA process that led to the approval of the mine addressed the needs of First Nations located southeast of the mine, specifically Fort Albany First Nation on the Albany River. Our findings indicate that the proponent, De Beers Canada Inc., with the approval of government authorities, primarily consulted and worked with Attawapiskat First Nation through the EA process and largely excluded other First Nations in the region. Limitations of EA in the context of northern Canada are identified. The potential of emerging community-based and regional land use planning in Ontario's far north is discussed.     

醒来的桃源--四川光雾山国家风景名胜区游人接待中心规划与建筑设计

随着人们访古探幽线路的不断延伸,许多原本人迹罕至的景点、隐于大山深处的古迹渐渐引起人们的关注．位于四川省巴中市的光雾山景区就是一个例子。文章以四川光雾山国家风景名胜区游人接待中心规划与建筑设计为例．从可识别性、可生长性和可延续性三个方面讨论了旅游开发与有序发展的合理平衡。