FARMER: A novel approach to file access correlation mining and evaluation reference model

File semantic has proven effective in optimizing large scale distributed file system. As a consequence of the elaborate and rich I/O interfaces between upper layer applications and file systems, file system can provide useful and insightful information about semantic. Hence, file semantic mining has become an increasingly important practice in both engineering and research community. Unfortunately, it is a challenge to exploit file semantic knowledge because a variety of factors could affect this information exploration process. Even worse, the challenges are exacerbated due to the intricate interdependency between these factors, and make it difficult to fully exploit the potentially important correlation among various semantic knowledges. This article proposes a file access correlation miming and evaluation reference (FARMER) model, where file is treated as a multivariate vector space, and each item within the vector corresponds a separate factor of the given file. The selection of factor depends on the application, examples of factors are file path, creator and executing program. If one particular factor occurs in both files, its value is non-zero. It is clear that the extent of inter-file relationships can be measured based on the likeness of their factor values in the semantic vectors. Benefit from this model, FARMER represents files as structured vectors of identifiers, and basic vector operations can be leveraged to quantify file correlation between two file vectors. FARMER model leverages linear regression model to estimate the strength of the relationship between file correlation and a set of influencing factors so that the “bad knowledge” can be filtered out. To demonstrate the ability of new FARMER model, FARMER is incorporated into a real large-scale object-based storage system as a case study to dynamically infer file correlations. In addition FARMER-enabled optimize service for metadata prefetching algorithm and object data layout algorithm is implemented. Experimental results show that is FARMER-enabled prefetching algorithm is shown to reduce the metadata operations latency by approximately 30%–40% when compared to a state-of-the-art metadata prefetching algorithm and a commonly used replacement policy.     

Nearest neighbor search algorithm based on multiple background grids for fluid simulation

The core of smoothed particle hydrodynamics (SPH) is the nearest neighbor search subroutine. In this paper, a nearest neighbor search algorithm which is based on multiple background grids and support variable smooth length is introduced. Through tested on lid driven cavity flow, it is clear that this method can provide high accuracy. Analysis and experiments have been made on its parallelism, and the results show that this method has better parallelism and with adding processors its accuracy become higher, thus it achieves that efficiency grows in pace with accuracy.     

Function oriented service composition modeling

Formal models for service composition have been proposed with the variation of the requirements of service developers. Some famous models have provided checking and verification techniques and tools for the behavior of service composition. These models generally focus much on the message flow of web services and neglecting the data contained in the exchanged messages among services, which restrict the application range of these models and also the web service techniques. As new kind of services with different protocols and communication methods have appeared, it is needed to model service composition from a new view which is adapted to the new development in service area. In this paper we offer a function oriented model of service composition which treats the composite service as a software system and specify the function of services which can be directly used to the realization by service providers.     

Searching high gray scale FPD scanning matrix based on PSO

With the increase of gray scale and flat panel display (FPD) size, subspace bitwise scanning strategy can be replaced traditional scanning method to cut down frame frequency. However, the direct searching strategy (DSS) becomes unfeasible to obtain corresponding high gray scale scanning matrix. Thus, particle swarm optimization (PSO) is introduced to accelerate searching for high gray scale weights scanning matrix (WSM) with its parallelism and global optimization feature. Finally a WSM of 256 gray scales is found out successfully with Matlab, which both gray linearity and scanning efficiency are satisfied.     

“工农兵”:“吊诡”的形象符号——“十七年诗歌”中的“工农兵”形象研究

"十七年诗歌"中的"工农兵"意象是一种"吊诡"的形象符号,一方面它以"完型化"形象符号照亮新的"民族国家精神",另一方面又遮蔽了"真实"世界里"工农大众"精神形态的复杂性;一方面它确证和巩固了新的民族国家的"合法性",另一方面又使诗歌陷入"公式化"的俗套而诗人则成为符号"软暴力"的对象;一方面它让"工农大众"在虚拟镜像中获得"翻身做主人"的政治文化快感,另一方面又使他们在符号的迷狂中丧失精神的主体性。     

近代中国社会变迁与中国共产党的创建——对中国共产党创建历史缘由的社会解读

中国共产党的创建是近代中国社会演变的必然产物。从社会史的视角来看,中国共产党的创建有近代中国社会变迁的内在主因。具体说,近代中国的留学运动及国内新式教育的兴起为中共的创建准备了领袖群体,近代中外文化交流特别是马克思主义在中国的传播为中共的创建提供了指导思想,新文化运动的思想启蒙与五四运动的政治实践为中共的创建准备了干部条件,中国工人阶级在民族资本主义发展中成长起来奠定了中共创建的阶级基础,近代中国民族危亡的形势及政治现代化进程形成了中共创建的政治条件。换言之,近代中国社会变迁的诸多层面,为中共的创建提供了"领袖群体"、"指导思想"、"干部条件"、"阶级基础"、"政治条件"等前提。     

新媒体新闻的演变与社会舆情表达

以网络为主的新媒体传播发布的新闻,产生了与以往平面媒体完全不同性质的新闻报导、写作与编辑——网络新闻。网络新闻自平面媒体文本的转贴上传开始,近年来已经产生了完全不同的网络新闻。所谓"新媒体"的概念在近年来变化很大,作为新媒体的标志,从互联网而后,有短信、手机电视、对等互联的P2P工具等等。受众的移动化导致了传媒的移动化,传媒的移动化成了当今新媒体新闻发展的最重要的趋势。与此同时,当新媒体新闻还在与传统媒体互相侵入、互相融合时,三网合并、全媒体、融合媒体的新闻概念也被提了出来。文章讨论新媒体演变过程对新闻传播的影响,特别是网络媒体新闻交互中的公民新闻的舆情表达。除了时效性强、有图片、视频和音频的支撑、可以现场同步播报外,网络新闻的本质是增加了新闻的深度和交互,这使得公民新闻有了新的内涵。网络新闻的深度和交互表现在新媒体——各种背景的官方或私人网站对新闻的搜集、采访、发布和反馈,其中,反馈和交互产生了新闻的新形态;而新媒体尤其是私媒体如播客、博客、聊天室、微博等的运用,对社会舆情的表达也有了特殊的价值。     

论经学对古代文论学术特征之影响

按照学理,古代文论作为一门以抽象思辨、理论论证为特征的理论性学科,应该以严密的逻辑来论证其理论,应该运用明晰、精确的理论化语言、分析论证的表述方式来表达其思想观点,并用论证性文体来建构其理论,这样才能体现出以"论"为本色的学术特征。但长期以来,学术界普遍认为古代文论的主流学术特征是:运用形象化文学语言和审美化描述方式来表述其理论观点,使用诗、赋、骈文等文学性文体展开理论建构。这种主流学术特征使古代文论具有很高的审美价值,但也在很大程度上弱化了"论"的学术特征,并严重地影响了古代文论走向当代。事实上,古代文论并不缺乏"论"的学术特征,只是目前尚不为学术界所关注。而形成这种学术特征的深层原因,是经学。经学对古代文论的"论"的学术特征的影响主要体现在三方面:一是明晰精确的理论化语言,经学中的文论著述体现出了鲜明的理论化语言特色。二是逻辑论证的表述方式,经学关于文论的表述,以逻辑论证为显著特点。三是理论性文体的运用,一方面经学元典中"要言"、"语录"式文论文献从文体形式上对后世文论产生了深远影响;另一方面,经学家阐释文论问题所运用的"论"、"序"、"书"及"诗话"等文体,都体现出了突出的理论性特点。     

我国研究生资助体制演进的研究

介绍新中国成立以来我国研究生资助体制的演进过程,指出新中国六十年中,我国的研究生资助方式和资助力度均发生了很大的变化,从单一的助学金模式发展为“奖、助、贷、补”多元化叠加模式;从完全免费教育,到部分免费教育,资助力度呈现下降态势。研究生学习阶段的机会成本增大,研究生贫困化现象日渐严重,这将不利于“建设人才资源强国”战略目标的实现。     

中小学教师惩戒权及其适用范围探析

教育惩戒权是中小学教师的合法职权,目的在于更好地实现对学生的教育与管理。在实践中．中小学教师惩戒权主要适用于学生的学业型失范行为、违纪型失范行为、失德型失范行为和违法型失范行为。为更好地发挥教育惩戒权的积极影响,实施中应遵循一定的要求,明确中小学教师惩戒权的教育性导向,明晰中小学教师惩戒权的权利与义务的关系,构建制度化的中小学教师惩戒权体系。