英汉本族语者对中国英语学习者的口音感知及言语理解度的对比研究

本文以某高校非英语专业研究生为说话人,以英语专业研究生和英美留学生为听话人,考察了听话人对说话人口音的感知以及说话人的口音对听话人理解度的影响。研究发现,英汉本族语者都认为韵律特征和口音感知最相关,而在口音和言语理解度的关系上存在较大差异。英语本族语者认为韵律特征与言语理解度关系最密切,而汉语本族语者则认为韵律特征在言语理解过程中不起决定作用。研究结果对二语语音习得理论构建和语音教学带来一些启发。     

教授头衔:大学教师的梦想还是梦魇——从浙江大学“最年轻教授博导”谈起

在大学教书,获取教授头衔是教师的梦想。然而,在追求教授梦的征途中,有些教师年轻轻的就圆了梦,而有些教师却屡遭梦魇。从表面上看,这是一个教学与科研孰轻孰重的问题;从本质上看,则是一个涉及教学或科研、教师或学者、公平或效率、经历或经验等内容的教师职业发展问题。教授是大学教师的最高职务,并非什么人都能当。即便是大学教师,因其职业发展的多样性,不是也不能更不需要人人都晋升到教授。教授有严格的任职标准,只有长期探索学术问题、亲历亲为育人实践、养成自觉学术品行,收获学术创新成就的人,才有资格享有"教授头衔"。因此说,"教授头衔"不是奖品,不可用于奖励;也不是礼物,不能用于赠送;更不是商品,不可用于交易。     

大学生政治参与行为的调查与引导——基于重庆大学的调研数据

本文以重庆大学的学生政治参与行为进行问卷调查,用因子分析法提取三个大学生政治参与行为指标,按重要性排序:"F3关注身边时政(M=4.24)"、"F2培养参政能力(M=3.99)"、"F1参加政治投票(M=3.54)"。民族因素对因子1有显著影响,对因子2和因子3影响不显著。专业因素对因子1、因子2、因子3均有显著影响。性别因素对因子1和因子2有非常显著的影响,在因子3上,男女生之间没有显著差异。     

“在家上学”的教育逻辑与反思

随着社会的进步与发展,人们对教育的诉求越来越多元化。在传统的学校教育之外,家长们一直在探寻更适合他们下一代的教育方式,一种新的教育形式——"在家上学"逐渐走进了人们的视野。与传统学校教育相比,在家上学既有进步的一面,同时也面临着许多问题和争议。     

社会化网络环境下营销效果测评——以微博为例

本文以微博为例,第一次将社会化网络环境下的营销过程划分为:曝光、互动、转化、以及维护四个阶段,并以此为基础,运用层次分析法建立了营销效果两级测评指标,通过德尔菲法获取各级评价指标的权重值,最终构建形成社会化网络环境下营销效果测评体系。采用粗糙集决策分析方法对多件微博营销事件进行实验分析,总结归纳出影响企业社会化网络营销效果的主要因素,为企业在社会化网络环境下进行营销效果的合理测评提供建议,对企业社会化网络营销的发展和"以用户为中心"的产品与服务优化有一定的指导作用。     

面向泛在信息社会的国家战略及图书馆对策研究

在充分理解泛在信息社会内涵的基础上,借鉴国外已有的泛在信息社会国家战略的理论成果和实践经验,结合我国的实际情况、已有基础和可操作性,提出我国泛在信息社会的国家战略初步构想,同时思考图书馆在泛在信息社会环境中的定位和作用,并提出对策,努力推动图书馆在泛在信息环境中的变革。     

动态环境下的高校内部治安防范机制研究分析

近几年,随着我国科技兴国事业的发展,高等教育事业随之获得了一定的发展空间。高等院校的办学规模不断扩大,其自身的教育模式也逐渐从传统的教学模式转为现代化开放式的教育模式。在实际生活中,高校内部治安防范问题,成为社会公众关注的一个重点问题。本文简要分析动态环境下的高校内部治安防范机制方面的内容,旨在更好地促进高校内部治安工作的顺利开展。     

基于ARMA模型的河北省城乡居民信息消费差距分析

利用ARMA模型分析河北省城乡居民信息消费差距。研究结果表明,城乡居民信息消费倾向差距有先增后减的趋势;信息消费系数持续稳定增加,但差距依然存在;信息消费差距逐渐增大,2015年有缩小的趋势。因此应该更加关注农村居民信息消费,进一步提高农村居民收入、加强农村信息基础设施建设、提高农村居民文化水平和消费意识。     

Spatial concentration distribution analysis of cells in electrode-multilayered microchannel by dielectric property measurement

The spatial concentration distribution of cells in a microchannel is measured by combining the dielectric properties of cells with the specific structure of the electrode-multilayered microchannel. The dielectric properties of cells obtained with the impedance spectroscopy method includes the cell permittivity and dielectric relaxation, which corresponds to the cell concentration and structure. The electrode-multilayered microchannel is constructed by 5 cross-sections, and each cross-section contains 5 electrode-layers embedded with 16 micro electrodes. In the experiment, the dielectric properties of cell suspensions with different volume concentrations are measured with different electrode-combinations corresponding to different electric field distributions. The dielectric relaxations of different cell concentrations are compared and discussed with the Maxwell-Wagner dispersion theory, and the relaxation frequencies are analysed by a cell polarization model established based on the Hanai cell model. Moreover, a significant linear relationship with AC frequency dependency between relative permittivity and cell concentration was found, which provides a promising way to on-line estimate cell concentration in microchannel. Finally, cell distribution in 1 cross-section of the microchannel (X and Y directions) was measured with different electrode-combinations using the dielectric properties of cell suspensions, and cell concentration distribution along the microchannel (Z direction) was visualized at flowing state. The present cell spatial sensing study provides a new approach for 3 dimensional non-invasive online cell sensing for biological industry.     

Microwells support high-resolution time-lapse imaging and development of preimplanted mouse embryos

A vital aspect affecting the success rate of in vitro fertilization is the culture environment of the embryo. However, what is not yet comprehensively understood is the affect the biochemical, physical, and genetic requirements have over the dynamic development of human or mouse preimplantation embryos. The conventional microdrop technique often cultures embryos in groups, which limits the investigation of the microenvironment of embryos. We report an open microwell platform, which enables micropipette manipulation and culture of embryos in defined sub-microliter volumes without valves. The fluidic environment of each microwell is secluded from others by layering oil on top, allowing for non-invasive, high-resolution time-lapse microscopy, and data collection from each individual embryo without confounding factors. We have successfully cultured mouse embryos from the two-cell stage to completely hatched blastocysts inside microwells with an 89% success rate (n = 64), which is comparable to the success rate of the contemporary practice. Development timings of mouse embryos that developed into blastocysts are statistically different to those of embryos that failed to form blastocysts (p–value < 10⁻¹⁰, two-tailed Student''s t-test) and are robust indicators of the competence of the embryo to form a blastocyst in vitro with 94% sensitivity and 100% specificity. Embryos at the cleavage- or blastocyst-stage following the normal development timings were selected and transferred to the uteri of surrogate female mice. Fifteen of twenty-two (68%) blastocysts and four of ten (40%) embryos successfully developed into normal baby mice following embryo transfer. This microwell platform, which supports the development of preimplanted embryos and is low-cost, easy to fabricate and operate, we believe, opens opportunities for a wide range of applications in reproductive medicine and cell biology.