Effect of Inclined Water Jets on Tensile Strength of Bicomponent Hydroentangled Nonwoven Fabrics

The effects of inclined water jets on bicomponent hydroentangled fabrics were investigated. The PET/COPET and PA6/PET hydroentangled fabrics were made by using designed inclined water jet apparatus. Effects of basis weight, water jets inclination angle and water jet pressure were discussed. The comparison was made on the average tensile strength of fabrics made by perpendicular water jets （0^o inclination angle） and inclined water jets of 20^o with pressure levels of 3 bars and 7 bars. It was found that increases of water jet pressure, the fabrics tensile strength were increased. Furthermore, increases of water jets inclination angle, fabric tensile strength of 60 g/m^2 fabrics decreased while for 100 g/m^2 fabrics tensile strength increased.     

基于Pd纳米线的过氧化氢无酶传感器

基于AAO模板采用电化学沉积法在玻碳电极表面制备Pd纳米线,采用扫描电子显微镜表征了纳米线的形貌。用Pd纳米线构建了过氧化氢无酶传感器。研究结果表明：该传感器对过氧化氢（H2O2）具有很好的电化学催化作用。对过氧化氢的响应范围为1.0×10^-5-1.62×10^-3mol/L,检出限达到6.0×10^-6mol/L。该传感器具有较好的稳定性和重现性。     

基于PSR模型的舟山群岛新区土地集约利用评价

生态脆弱、可利用土地有限已成为制约浙江舟山群岛新区经济发展的重要瓶颈之一．利用PSR评价模型对舟山群岛新区近10年（2001-2010）年土地集约利用进行评价,总评价值从0．0118上升到0．0816,增长了将近7倍,土地所承受的压力逐年下降,带来的效益以及政府在环境等方面的投入响应逐年增加．研究结果表明,舟山地区土地利用总体走向良好,但要实现可持续发展还应注意产业发展与其所依赖的土地资源之间的关系,加强对周边海洋环境的保护．     

株洲市区大气臭氧污染特征分析

本文对株洲市区环境空气中的臭氧污染现状进行了调查分析。利用株洲市大气自动监测系统2013年监测数据,分析株洲市臭氧污染情况及臭氧浓度与时间、空间的变化规律。探讨了臭氧浓度和前体物氮氧化物以及各气象参数之间的关系。     

Sky islands of southwest China. I: an overview of phylogeographic patterns

Sky islands are high-elevation areas in continental mountain ranges,which are geographically isolated.We adopted this concept for the mountains in southwest China,which are among the most important biodiversity hot spots on earth.We reviewed the phylogeographic studies of this area and highlighted the sky-island features.We concluded that the genetic structures of species in these islands were shaped by complex topography,climate and habitats.The global climate change,such as Pleistocene climate fluctuations and periodic uplift of the Qinghai–Tibetan Plateau,also have important effects on biodiversity and geographic patterns,when species have responded idiosyncratically by changing their distributions or through adaptation.Future research needs in sky islands include multilocus data and comparative phylogeographic studies,integrating with the methodological advances in the other fields.Using these approaches,we can examine to what degree the geographic,climate and/or biological factors,shape strong geographic patterns,promote diversification/speciation and preserve species/genetic diversity.We hope this paper will inspire future work to uncover the mechanism that has generated the endemic biodiversity and to further resolve the most essential problem:How to protect the biodiversity with limited funding during the coming drastic global climate change.     

明清时期闽台海岛状况蠡测

明清时期,闽台海岛开发经历了巡检司、卫所或寨游、军镇发展为海岛行政区.海岛居民的经济开拓,减轻了海禁政策的消极影响,由传统自然经济向以海洋经济为导向的商品经济过渡,海岛的经济发展与军事驻防相辅相成.海岛教育基本上按照内地的模式,共同的科举制度将海岛与内地的读书人紧密地联系在一起,思想文化上相互影响,形成了有鲜明的区域特色的闽台文化.探讨海岛开发的不利因素与不足之处,祈望能为发展海洋经济提供有益的借鉴.     

软启动器烧毁另类原因分析与解决

通过在实际工作中解决软启动器烧毁故障的实践,从另一角度分析了类似软启动器等精密设备的故障原因,对在制作、组装过程中出现的氧化问题提起了重视及解决方法的参考.     

金属氧化物半导体纳米气敏材料研究进展

由于社会需求紧迫,金属氧化物半导体纳米气敏材料成为当今研究的热点。本文综述了从材料元素的组成、形貌及尺寸的控制以及制备方法等方面来提高金属氧化物半导体纳米材料气敏性能的研究进展。     

氧化锌避雷器泄漏电流在线检测的研究

针对ＺｎＯ避雷器泄漏电流的在线检测问题，从测试方法和测试手段２个方面对目前的测试仪状况进行了分析，在信号的取样环节方面，提出一种采用光电隔离传输电路作为取样环节的方案不仅能满足测试仪与主电路间电气隔离的要求，同时能较好地跟踪避雷器泄漏电流波形，是一种较的理想的测试手段。     

浙江北麂列岛岩相潮间带底栖无脊椎动物的区系研究

作者于1997年4月至1998年4月,对浙江北虎列岛岩相潮间带底栖无脊椎动物进行了调查研究,经初步整理、鉴定,共计无脊椎动物153种,隶属于68科116属,并对其种类组成、区系特点进行了分析