低碳理念下的古镇旅游发展--以青岩古镇为例

青岩古镇在旅游业发展中引入了低碳的理念,在旅游生产中坚持基础设施建设低碳化、交通运输方式低碳化、古镇建设低碳化和提高碳汇能力,在旅游消费中引导游客进行低碳饮食、低碳住宿、低碳出行和低碳旅游购物等,对降低整个景区的碳排放具有良好效果。     

One-heater flow-through polymerase chain reaction device by heat pipes cooling

This study describes a novel microfluidic reactor capable of flow-through polymerase chain reactions (PCR). For one-heater PCR devices in previous studies, comprehensive simulations and experiments for the chip geometry and the heater arrangement were usually needed before the fabrication of the device. In order to improve the flexibility of the one-heater PCR device, two heat pipes with one fan are used to create the requisite temperature regions in our device. With the integration of one heater onto the chip, the high temperature required for the denaturation stage can be generated at the chip center. By arranging the heat pipes on the opposite sides of the chip, the low temperature needed for the annealing stage is easy to regulate. Numerical calculations and thermal measurements have shown that the temperature distribution in the five-temperature-region PCR chip would be suitable for DNA amplification. In order to ensure temperature uniformity at specific reaction regions, the Re of the sample flow is less than 1. When the microchannel width increases and then decreases gradually between the denaturation and annealing regions, the extension region located in the enlarged part of the channel can be observed numerically and experimentally. From the simulations, the residence time at the extension region with the enlarged channel is 4.25 times longer than that without an enlarged channel at a flow rate of 2 μl/min. The treated surfaces of the flow-through microchannel are characterized using the water contact angle, while the effects of the hydrophilicity of the treated polydimethylsiloxane (PDMS) microchannels on PCR efficiency are determined using gel electrophoresis. By increasing the hydrophilicity of the channel surface after immersing the PDMS substrates into Tween 20 (20%) or BSA (1 mg/ml) solutions, efficient amplifications of DNA segments were proved to occur in our chip device. To our knowledge, our group is the first to introduce heat pipes into the cooling module that has been designed for a PCR device. The unique architecture utilized in this flow-through PCR device is well applied to a low-cost PCR system.     

论大学校园文化中的公寓文化建设

公寓文化是校园文化的重要组成部分。目前在校园文化特别是公寓文化建设中存在着一些问题,如学校对公寓文化建设重视不够,公寓文化活动仍处于自发性和盲目性状态,缺乏有效的管理监督机制,内涵相对贫乏,网络文化的消极影响严重等。高校应加强对学生公寓的管理,在提升公寓后勤管理队伍的整体素质的同时,通过加强公寓硬件、精神文明、管理服务等方面的建设,营造一个优秀健康、和谐向上的大学生公寓文化氛围,促进大学生的全面健康发展。     

广州大学校园体育设施调查研究

本文主要对广州大学校园体育设施进行调查研究,并利用ArcGIS软件制作出广州大学校园体育设施分布图.研究得出了广州大学校园体育设施在使用、分布、维护及管理等方面存在的问题.针对问题,提出了合理布局,充分发挥学校场地器材综合功能等建议.     

萨摩亚《公共档案法》述评

萨摩亚是南太平洋的岛国之一,其在档案方面的立法较晚,《萨摩亚公共档案法》是萨摩亚档案法规体系的核心,是萨摩亚的基本档案法。为探究萨摩亚国家档案法发展背景、进程及立法具体情况,给我国以及其他国家的档案法规体系发展建设提供参考与借鉴,研究采用文献研究法、网络调研法和对比分析的方法对萨摩亚《公共档案法》进行了介绍、述评、分析。最后本研究对萨摩亚的《公共档案法》作出了评价与思考,为萨摩亚国家档案工作发展提供参考借鉴。     

Identity: a complex structure for researching students’ academic behavior in science and mathematics

This article is a response to Pike and Dunne’s research. The focus of their analysis is on reflections of studying science post-16. Pike and Dunne draw attention to under enrollments in science, technology, engineering, and mathematics (STEM) fields, in particular, in the field of physics, chemistry and biology in the United Kingdom. We provide an analysis of how the authors conceptualize the problem of scientific career choices, the theoretical framework through which they study the problem, and the methodology they use to collect and analyze data. In addition, we examine the perspective they provide in light of new developments in the field of students’ attitudes towards science and mathematics. More precisely, we draw attention to and explicate the authors’ use of identity from the perspective of emerging theories that explore the relationships between the learner and culture in the context of science and mathematics.     

浅谈少数民族预科基础写作课程教学的现状及对策——以湖北民族学院科技学院为例

少数民族预科汉语基础写作是预科教育的基础课程,其教学目标在于通过培养预科学生汉语听、说、读、写的能力,提高其书面表达及口头表达的能力。然而,湖北民族学院科技学院少数民族预科基础写作教学存在很多不足。本文力求在分析本校少数民族预科写作教学现状的基础上,探究相应对策,以提高教学质量。     

全球化场域中社会主义意识形态话语权的变化与建构

在全球政治、经济、文化的相互作用下,意识形态的政治话语权中心地位被打破,文化话语权彰显;主流思想文化话语权面临被分化、淡化等的处境与认同危机;作为规制个体精神生活的话语权受到生活碎片化、选择多样化,以及消费主义生活方式的挑战.考察和研究全球化场域中意识形态话语权的变化及其特点,以马克思主义为指导,以社会主义核心价值观为基本遵循,加强社会主义意识形态话语权建构,这对于我们有效应对当前意识形态领域的斗争,巩固马克思主义在意识形态领域的指导地位,牢牢掌握社会主义意识形态话语权,具有十分重要的意义和作用.     

一种改进的DV-HOP算法在WSN中的定位研究

如何能够更好的提高节点定位一直都是WSN研究的重点,本文在DV-HOP定位算法的基础上,从误差精度,锚节点稳定度和反向学习选择-最小二乘估计来对节点定位的3个方面进行改进。首先在定位误差精度中引入混沌优化算法,其次在锚节点处理中引入稳定度概念,最后在未知节点定位中引入反向学习和最小二乘估计。改进后的算法在通信半径和拓扑结构两个方面进行了仿真实验,实验表明,本文算法能够有效的减少计算带来的定位误差,提高定位精度。