警察院校武术课程防卫控制技术训练与心理干预探析

社会治安问题的加剧,警察院校学生的实战技能逐渐在加强,大力开展防卫控制技能是很多警察院校重点培养后备人民警察的重要举措,通过课程的开展达到强健体魄,防身自卫,安全执法的目的。本文通过文献资料法、社会调查法,专家访谈法,对几所警察院校《防卫控制技术》课程开设情况以及学生的心理情况进行调查,分析并指出了当前防卫控制技能教学存在的主要问题,为以后更好地开展这门课程,培养更多的优秀学生提供一点参考。     

形成性评估应用于大学英语听力教学的绩效研究

实验研究得知,相较于终结性评估,形成性评估应用于大学英语听力教学不仅能够更为有效地激发和提高学生的学习动力,而且更能有效地提升听力学习绩效;形成性评估更能激发学生的听力学习自主性和合作性,提高其听力自主学习能力和合作学习能力.形成性评估能促使教师转变教学方式,改进听力教学,对提高教学质量和教学绩效有一定的意义.     

施工企业项目成本控制体系的建立与应用

以系统思想为指导,分析目前施工企业项目成本控制中存在的问题,运用理论分析与实证分析研究相结合的方法,构建项目成本控制体系,并在具体项目上进行应用.     

我们那一代工人作家

从我个人感受说起. 我原是上海柴油机厂一名技术工人,解放前只读过三年书,为了谋生就去当学徒了.1952年因积极参加职工夜校学文化并取得一点成绩,被评为上海五金工会系统的学习模范,夜校老师要我写篇获奖后感想,发表在厂部食堂门口大黑板报上.     

Making American Friends: The Effects of Musical Tastes and English Proficiency on Chinese International Students’ Social Networks in the United States

This study investigated the relationship between Chinese international students’ social networks in the United States and their musical tastes. Based on concept of homophily, this study used a self-reported Social Network Analysis (SNA) survey to examine whether sharing similar musical tastes affected Chinese international students’ relationship, their musical tastes, and music consumption. The results showed that having high musical taste similarity predicted closer relationship between respondents and their alters, and higher likelihood of new music consumption. This study also found that frequent American English-language songs listeners were more likely to have Americans in their social network than less-frequent American English-language songs listeners.     

Injectable hybrid inorganic nanoscaffold as rapid stem cell assembly template for cartilage repair

Cartilage injuries are often devastating and most cannot be cured because of the intrinsically low regenerative capacity of cartilage tissues. Although stem-cell therapy has shown enormous potential for cartilage repair, the therapeutic outcome has been restricted by low survival rates and poor chondrocyte differentiation in vivo. Here, we report an injectable hybrid inorganic (IHI) nanoscaffold that facilitates fast assembly, enhances survival and regulates chondrogenic differentiation of stem cells. IHI nanoscaffolds that strongly bind to extracellular matrix (ECM) proteins assemble stem cells through synergistic 3D cell–cell and cell–matrix interactions, creating a favorable physical microenvironment for stem-cell survival and differentiation in vitro and in vivo. Additionally, chondrogenic factors can be loaded into nanoscaffolds with a high capacity, which allows deep, homogenous drug delivery into assembled 3D stem-cell-derived tissues for effective control over the soluble microenvironment of stem cells. The developed IHI nanoscaffolds that assemble with stem cells are injectable. They also scavenge reactive oxygen species and timely biodegrade for proper integration into injured cartilage tissues. Implantation of stem-cell-assembled IHI nanoscaffolds into injured cartilage results in accelerated tissue regeneration and functional recovery. By establishing our IHI nanoscaffold-templated 3D stem-cell assembly method, we provide a promising approach to better overcoming the inhibitory microenvironment associated with cartilage injuries and to advance current stem-cell-based tissue engineering.     

MPI下矩阵相乘的实现与分析

随着多核处理器及并行计算机的发展,并行程序设计在高性能计算及进程通信等领域得到更广泛的应用。而MPI(Message Passing Interface消息传递接口)作为目前最重要的并行编程工具,提供了丰富的消息传递库函数,极大方便了并行算法的实现。本文首先介绍并行计算及MPI的基本内容,然后在MPI并行计算环境下实现了一种n×n阶矩阵相乘的并行算法,并与传统的串行算法进行了性能方面的分析和比较。     

等离子体的诊断方法

文章对等离子体诊断的常用方法及适用范围作了介绍，并认为对任何能反映等离子体性质的物理量的测量方法，都可以作为等离子体诊断的方法。     

郑珍诗歌与杜诗的渊源关系研究

郑珍诗歌的宗法关系在学界一直存在争议。仔细研读郑珍的诗歌,结合前代学者对郑珍诗歌的研究成果,可知郑珍诗歌继承最多应是"诗圣"杜甫诗歌之笔法。在诗歌内容上,郑珍诗歌继承了杜诗的"诗史"精神,用诗歌的形式记录了当时的历史现实,具有一定的史学价值;在形式上,郑珍诗歌继承了杜诗即事明篇的技巧、浑然天成的近体诗的技巧、以议论入诗的技巧、塑造典型的技巧、"看景入细入微"的细节描写技巧、以民间口语俗语入诗和炼字炼句技巧以及独到的"点化"诗句的技巧等。     

一种基于信任管理技术的相关研究

本文针对目前分布式计算安全领域涉及到信任模型和信任管理技术研究中的不足,重点对信任模型的描述能力,信任关系量化的形式和影响信任关系的因素等进行研究.力求加大信任模型对信任关系的动态性、主观性和多属性建模的支持,改善信任评估的准确性和动态适应能力.