中小学英语校本课程开发的与思考

在当今如火如荼的进行的课程改革之中,基于学校的具体形式和英语教学的特殊性,在强调交际拓展、文化传播的指导下,中小学英语校本课程的开发代表了一种新的课程理念和课程形态。校本课程的开发本身就具有了一定深度的探究性质,文章从英语校本课程开发的基本原则、可能遇见的问题以及相应解决对策,对中小学英语校本课程开发进行了一定的思索以及探究。     

图书馆空间降噪设计探寻

图书馆作为人类文化传播的重要基地,环境品质一直是其空间质量的第一诉求点,空间降噪是影响图书馆环境品质的重要因素。本文从目前图书馆的时代发展要求和用户需求入手,论述了提高图书馆建设品质对整体空间降噪的需求,并从环境降噪、建筑降噪、设备降噪和室内装修降噪等方面提出关于图书馆空间降噪的具体操作建议。     

High-throughput particle manipulation by hydrodynamic,electrokinetic, and dielectrophoretic effects in an integrated microfluidic chip

Integrating different steps on a chip for cell manipulations and sample preparation is of foremost importance to fully take advantage of microfluidic possibilities, and therefore make tests faster, cheaper and more accurate. We demonstrated particle manipulation in an integrated microfluidic device by applying hydrodynamic, electroosmotic (EO), electrophoretic (EP), and dielectrophoretic (DEP) forces. The process involves generation of fluid flow by pressure difference, particle trapping by DEP force, and particle redirect by EO and EP forces. Both DC and AC signals were applied, taking advantages of DC EP, EO and AC DEP for on-chip particle manipulation. Since different types of particles respond differently to these signals, variations of DC and AC signals are capable to handle complex and highly variable colloidal and biological samples. The proposed technique can operate in a high-throughput manner with thirteen independent channels in radial directions for enrichment and separation in microfluidic chip. We evaluated our approach by collecting Polystyrene particles, yeast cells, and E. coli bacteria, which respond differently to electric field gradient. Live and dead yeast cells were separated successfully, validating the capability of our device to separate highly similar cells. Our results showed that this technique could achieve fast pre-concentration of colloidal particles and cells and separation of cells depending on their vitality. Hydrodynamic, DC electrophoretic and DC electroosmotic forces were used together instead of syringe pump to achieve sufficient fluid flow and particle mobility for particle trapping and sorting. By eliminating bulky mechanical pumps, this new technique has wide applications for in situ detection and analysis.     

中小学教师阅读状况调查

调查发现,中小学老师绝大多数对于教师阅读在认识上有相当程度的重视,但行动上执行不彻底,落实不到位。同时存在阅读的主动性不强、阅读内容太狭窄、教师阅读气氛不浓厚等问题。主要原因在于教师行业目前经济压力较大,工作任务沉重时间不充裕,缺乏好书可读等阅读条件不充足、阅读服务不理想等原因所导致。笔者认为,政府、学校及教师个人可以从把教师个人主动性与学校集体互动性相结合、把阅读的工具性价值与目的性价值相结合、把阅读与实践相结合、把教师阅读与全民阅读相结合这几个方面贯彻落实于教学实践中以改善现有的阅读状况。     

广西高校图书馆民族文化资源建设研究’

加强民族文化资源建设对于广西当地的经济和社会发展而言具有重大的现实意义。广西高校图书馆是当地的文化部门,保护、传承当地的民族文化是广西高校图书馆的重要职责。广西高校图书馆应通过各种途径来收集民族文献资源,并在此基础上采取各种方式带动民族文化资源的开发利用。     

英文报刊新闻标题中的名词化隐喻分析

名词化隐喻的使用一直被看作科技语篇的一个主要特点,然而新闻标题中的名词化也是一个不容忽视的现象。本文以《洛杉矶时报》、《华盛顿邮报》等报刊新闻为例,以韩礼德的名词化隐喻理论为依据,分析了报刊新闻标题中的名词化现象。名词化作为构建概念语法隐喻的最有力的手段,对实现新闻标题所要求的简洁凝练、客观公正,以及新闻报道间的语篇衔接都起到重要作用。     

零价铁渗透反应格栅中电活化技术对铁表面化学成分的影响

本文通过批-柱实验研究低压直流电流对已被NO3-钝化零价铁渗透中零价铁（ZVI）的催化活化,研究发现：加载12V低压直流电流后,阴极附近TCE的去除速率常数比钝化后ZVI的去除效率高出约4倍,低压直流电流可以催化ZVI去除TCE,去除效果的增加和电压成正相关关系;同时,低压直流电流阴极可以活化已经钝化的ZVI,活化后不加载电流时ZVI对TCE的去除效率仍是钝化后ZVI的去除效率的约3倍。经过NO3-钝化后ZVI表面的氧化膜组成以Fe3O4为主;但在加载低压直流电流后,ZVI表面同时会有理α-/β—FeOOH生成,说明低压直流电可能会使Fe3O4溶解还原。     

Robust convergence of Cohen–Grossberg neural networks with mode-dependent time-varying delays and Markovian jump

The robust stochastic convergence in mean square is investigated for a class of uncertain Cohen–Grossberg neural networks with both Markovian jump parameters and mode-dependent time-varying delays. By employing the Lyapunov method and a generalized Halanay-type inequality, a delay-dependent condition is derived to guarantee the state variables of the discussed neural networks to be globally uniformly exponentially stochastic convergent to a ball in the state space with a pre-specified convergence rate. After some parameters being fixed in advance, the proposed conditions are all in terms of linear matrix inequalities, which can be solved numerically by employing the LMI toolbox in Matlab. Finally, an illustrated example is given to show the effectiveness and usefulness of the obtained results.     

松嫩平原苏打盐碱地治理与利用

该文介绍了松嫩平原苏打盐碱地的分布及利用现状，对苏打盐碱地农业利用中存在的问题进行了分析。根据苏打盐碱化的成因、特性和近年来对其治理方面的最新攻关研究进展，实施分类治理，分别提出了一些可行有效的方法：即对低洼易涝盐碱地进行高产优势水稻钵大苗抗逆栽培技术为核心的栽培措施；对地势相对较高的碱化旱田采用微咸水淋洗改良措施等。实验表明：施用TC-1号苏打盐渍化土壤改良剂la后，耕层土壤溶液钠离子浓度降低26.2%-39.9%，土壤渗透性增强，团聚体增加120%-150%，水稻单产提高10.8%；压砂和施加有机肥则降低了根层土壤的pH值，且它们的施加量与pH的降低速率成正相关；盐碱地水稻钵育大苗抗逆栽培技术使秧苗各项素质指标比普通育苗提高30%左右，平均增产15%。碱化旱田微咸水淋洗改良则使0-35cm深度的亚粘土壤含盐量降低20%-40%，ESP降低26.7%，使高产高效作物的种植成为可能，提高了盐碱地的利用效率。     

“本三”数控技术教学方法浅谈

针对数控技术课程内容丰富、学时少及理论性和实践性较强的特点,本文讲述了如何根据＂本三＂学生的特点以及培养方案把该课程讲好,并浅谈了自己的教学方法,该方法在实践中取得了良好的效果。