化学新课程改革与微型化学实验

新一轮基础教育改革中，化学新课程改革在理念和内容上都强调学习方式的转变，即倡导探究性学习．探究性学习的实质，是学生主动参与教学过程，积极从事各种探究活动，亲自发现科学概念和原理，掌握探究技能．事实表明微型化学实验是实现探究性学习的有效手段．     

贝娄小说中知识分子夫妻之间的权力关系

美国诺贝尔文学奖得主索尔·贝娄小说中知识分子夫妻之间的权力关系有三种模式 :竞争、控制、平等 ;两种性质 :压抑性和生产性。作者在小说中 ,对压抑性的权力关系作否定、贬抑的描绘 ;对生产性的权力关系作肯定、赞美的描述。贝娄的小说通过揭示男女知识分子之间的权力关系 ,突出了这些女性人物本身的知识品格和职业道路。     

面向储能的光伏微网成本评价与对策研究

微电网是智能电网的重要组成部分,可以有效协调区域内的电力资源。为研究面向储能的光伏微网电力成本变化情况和优化对策,基于微网多主体结构构建微网电力成本均衡模型,以微网内分布式光伏供应及用户电力需求的统计数据为主要输入对象,并设置变量来区分不同情景下的分布式可再生能源发电量,建立以时间为自变量的微网分布式电力收益函数和用户购电成本函数,刻画微网电力资源调度的动态均衡变化。基于微网电力资源调度实例,发现微网在并网情景下的购电成本小于储能情景下的购电成本（C并=2 033.6元C储=2 633.6元）,且储能情景下购电成本的22.8%都来自储能设施的日折旧费,因此,加大科技研发和增强微网协同管理可以降低微网成本。     

Repelling the “Rutter”: Social Differentiation Among Rural Teenagers

This paper examines low‐income white rural teenagers' management of race and class‐based inequality. It analyzes how these teenagers constructed boundaries to distinguish themselves from outsiders, but also to distinguish themselves from the local abject category of “rutter.” The findings reveal hidden interconnections between race and class in interactional practice, and highlight local processes of differentiation through which actors attempt to deflect stigma and attain credibility. The paper discusses how interactional mechanisms such as “internal othering” and “stigma‐theory” bolster race and class credibility, but reproduce inequality.     

Information and communication technology adoption in micro and small firms: Can internet access improve labour productivity?

The rapid spread of information and communication technologies (ICT) may increase firms’ productivity with important consequences for job creation and for economic growth. This article contributes to this discussion by analysing the impact of internet adoption on labour productivity and the mechanisms shaping this relationship in Peruvian micro and small manufacturing firms over the period 2011–2013. The article estimates a reduced form where labour productivity is a function of internet adoption and other explanatory factors. Internet adoption is instrumented using a measure of the availability of financial opportunities for micro and small firms in Peru. Findings indicate that internet adoption: (a) increases firms’ labour productivity; (b) reallocates employment away from temporary administrative workers and non‐remunerated workers and expands employment of permanent production workers; (c) leads to the formalization of labour relationships, to the implementation of new organizational practices and to the improvement of training measures. While changes in employment and formalization of workers are linked to labour productivity gains, increases in training measures and organizational changes do not generate any additional productivity increase. Policies oriented to promote the adoption of ICT in micro and small firms can be beneficial to close the productivity gap with larger firms in Peru. Moreover, policies directed to the formalization of the workforce can provide an extra benefit, i.e. additional labour productivity gains in firms adopting the internet. Finally, policies oriented to the development of digital skills are also important to ease the re‐employment of those workers losing their jobs and the achievement of additional productivity gains that new organizational practices can provide.     

Micro‐investment perspective and the potential of the universal basic income

The article evaluates prospects of the Basic Income (BI) as a development policy tool. While BI is a relatively new initiative within development policy, the article argues that it should be seen as a serious option in the future, given the changing geography of poverty and the findings from existing cash transfer schemes. The analysis is carried out as a synthesis of existing findings on BI pilot programmes, along with cash transfer instruments more generally. While not including new empirical data, the synthesis allows preliminary estimates on the likely impacts of abolishing conditioning and targeting in cash transfer schemes. Particular attention is paid to the notion of micro‐investment and the psychological conditions of micro‐investment.     

《花蓝瑶社会组织》与费孝通学术思想

通过重读《花蓝瑶社会组织》,分析了费孝通先生早年的学术研究动向,指出《花蓝瑶社会组织》第一次披露了金秀大瑶山花蓝瑶的人口、家庭和社会生活状况;第一次运用人类学理论和方法深入剖析了金秀大瑶山族团及族团之间的关系及其发展趋向;第一次成功地运用了“微型社会学”的调查研究方法剖析了花蓝瑶社会。     

微技术传播对青年人信仰的影响研究

以微博和微信为代表的微技术深刻影响着青年人的思维方式、行为方式、价值方式。同时,微技术在传播信仰过程中改变了传统的信仰格局,打破了政治输入和输出的传统信仰架构。青年不但成为了微技术信仰语言的创造者,也有着强烈的信仰平等诉求。在微技术时代,实现信仰治理的优化刻不容缓。     

双螺杆泵Ω形对称型螺杆流场数值分析

由于螺杆泵几何结构及流体流动状态较为复杂,其压力分布和速度等特性很难用数学解析法来分析计算。本文利用参数化设计模块建立双螺杆泵Q形对称型螺杆三维模型,构建双螺杆流道的流场分析模型,运用有限元分析方法得出了双螺杆泵流道内压力场和速度场分布规律。结果表明：流体在流道中的流速分布具有规律性,整个流道的流场速度高低交替变化,在螺杆与衬套间隙处的流动为层流,螺旋面接触区内的流动为复杂的湍流,离螺杆啮合区近的螺旋槽内易发生涡流。本研究结果对于了解双螺杆泵螺杆工况下的性能情况具有重要的参考价值。     

中国小微企业市场适应能力研究

小微企业以其灵活的市场适应能力,已经成为中国经济建设的一支重要力量,在分析小微企业市场适应能力的影响因素基础上,采用多级可拓综合评价方法对某小微企业进行了评价,并提出了提升小微企业市场适应能力的措施。