Simulation study on fluctuant flow stress scale effect

INTRODUCTION With the continuous development of science and technology, especially the rapid progress of electronic industry and micromachine, microparts are needed more and more, and their technical requirements are higher and higher (Geiger et al., 1994; 1996; Geiger and Engel, 2002). However, traditional processing technologies, like cutting, etc., do not meet these requirements. Traditional plastic forming technology has merits like high production rate, excellent me-chanical proper…     

论国家助学贷款补贴的教育资助效应

国家助学贷款现有贴息、代偿、利率补贴、风险补偿金、税前扣除、免征营业税等六种补贴形式,根据补贴方式的不同。它们可分为显性直接补贴、隐性直接补贴和显性间接补贴、隐性间接补贴四种类型。其中,显性直接补贴可以使更多的学生得到资助。并减轻其还贷负担,资助效果最理想;而隐性直接补贴和间接补贴的资助效果欠佳,前者会使受助学生减少,增加学生贷款成本,后者会导致贷款机构的“停贷”和机会主义行为。因此,政府应允许助学贷款利率浮动．再将间接补贴转化为贴息．以改善教育资助效应．促进教育公平．     

高职会计与审计专业职业素养教育课程体系的优化

高职会计与审计专业必须加强培养学生良好的职业道德、敬业精神、职业意识、沟通协调能力、文化素质和人文精神。为此,在优化课程体系的过程中,可以采取优化相关文化基础课教学内容,增设职业素养教育系列课程,丰富始业教育和职业生涯规划课程内容。增加社会实践的时间和内容,为专业课增设职业素养教育目标和要求,以及加强职业仿真训练等措施。     

混合径向平均体在积分变换下的性质

As a generalization of RpK, the mixed radial p-th mean bodies Rp(K,L, μ) have many properties similar to RpK. In this paper, some properties of Rp(K,L, μ) such as monotonicity, transform properties under volume-preserving lineartransformations, etc. were studied. By using the polar coordinate formula for volume and Fubini’s theorem, V (Rn(K,L, μ)) =V (L) was obtained.     

培养学生就业能力 深化教育教学改革

“就业是民生之本”。高职院校必须树立以就业为导向的高等职业教育质量观,以培养就业能力为目标,深化教育教学改革,注重市场定位,转变办学模式。不断创新学生工作新机制、新内容,注重学生综合素质的培养。强化全员、全程、全方位就业服务的观念,切实提高学生就业水平。     

阳离子染料－蒙脱石化学修饰电极的电化学性质─—与Nafion膜化学修饰电极的比较

用蒙脱石与Ｎａｆｉｏｎ制备了阳离子染料中性红化学修饰电极（ＣＭＥ）．两种ＣＭＥ在支持电解质溶液中有相似的循环伏安行为．蒙脱石ＣＭＥ的峰电流随膜厚增加而增加，而ＮａｆｉｏｎＣＭＥ的峰电流随膜厚增加有所降低．阳离子染料在蒙脱石膜内的扩散系数比在Ｎａｆｉｏｎ膜中的扩散系数大一个数量级．阴离子电活性物以及不同的制备方法对两种ＣＭＥ的电化学响应有不同的影响．两种ＣＭＥ在性质上的差异反映了两种膜的微结构与通透性等方面的差别．蒙脱石用作制备化学修饰电极的表面层材料有一定吸引力．     

不同锻炼方式对老年人高血压疗效的研究

为了探讨太极拳和慢跑运动对老年人高血压患的治疗效果，本对46名高血压患进行了1年的实验研究，结果表明：太极拳和慢跑对防治老年人高血压症有良好的疗效，且太极拳优于慢跑运动。     

21世纪我国成年人体质监测工作的管理与思考

我国成年人体质监测工作已步入启动阶段,如何根据都市人群的特点,建立有效的成年人体质监测的管理系统,本文对迈入２１世纪我国成年人体质监测工作的管理就其指导思想,组织体系,工作思路,任务目标,工作流程,网络建设等问题进行初步的探析,籍以作为体育行政部门提高监测工作的管理水平,出台相应法规和措施,倡导大众健身氛围,服务于广大市民提供可参考依据     

Joint time-frequency synchronization and channel estimation in two-way relay networks

This work investigates joint time-frequency synchronization and channel estimation in two-way relay networks (TWRN) that utilize amplify-and-forward (AF) relay strategy. A two-way transmission model for joint time-frequency synchronization and channel estimation in TWRN is provided. Due to the high dimension and complexity of the model, the maximum likelihood (ML) algorithm is over complex and a standard Markov chain Monte Carlo (MCMC) algorithm is ineffective. We instead develop a hybrid Metropolis–Hastings–Gibbs algorithm in order to facilitate joint time-frequency recovery and effective channel estimation. In particular, we present a reparameterized model to facilitate Gibbs sampling with respect to the self-interference channel. Then the second order truncated Taylor series approximation is adopted for carrier frequency offsets (CFOs) estimation. Furthermore, a heuristic way of determining update order of parameters is proposed and initial value of the Markov chain is discussed as well. To test the robustness and objectivity of our proposed algorithm, two MCMC estimators, each with its own prior distribution, are compared against each other. Numerical results are provided to verify the effectiveness and robustness of proposed algorithm in terms of both mean-square errors (MSE) and estimation bias. The bit error rate (BER) performance results are further offered for comparison.     

情境教学在环境生态课程中的运用

本文分别介绍了环境生态课程模式和情境教学 ,探讨了情境教学在环境生态课程实施中的运用 ,通过教学实例揭示特殊教育课程与教学在教学实践中的动态统一关系 ,指出情境教学可以作为环境生态课程教学中的有效教学方法。