一类具有不同Virasoro-向量的顶点算子子代数

根据X_I型Cartan矩阵的一类主子矩阵_J,构造出无扭仿射李代数■的同构于g(A_J)的子代数■_J的导代数■_J,以及■_J-模V_■(l,0).证明了V_■(l,0)不仅是顶点算子代数.而且是V_■(l,0)的具有不同Virasoro-向量的顶点算子子代数.     

临沂矿业集团邱集煤矿创新管理的实践与启示

结合临沂矿业集团邱集煤矿实际,从技术装备、安全管理、教育培训、安全文化等四个方面对该矿创新管理的实践进行分析,并从中得到启示.     

江苏区域旅游游客满意度评价研究

游客满意是旅游市场竞争力的来源,是稳定规模化游客流的根本动力.运用灰色系统中灰色关联分析法,从交通、旅游景区(点)、购物、环境卫生、住宿、餐饮、娱乐、门票价格、导游讲解服务9个要素入手构建评价指标体系,以江苏12个省辖市为例,对游客满意度进行综合评价,揭示影响游客满意度众多指标之间关系的强弱,对12市游客满意度的优势劣势分析,并进行排序,得出江苏区域旅游游客满意度4个层次:镇江、扬州满意度最高,苏州、常州次之,南京、无锡、徐州、南通为第三层次,泰州、盐城、连云港和淮安最低。     

Cooperative Sensor Anomaly Detection Using Global Information

Sensor networks are deployed in many application areas nowadays ranging from environment monitoring, industrial monitoring, and agriculture monitoring to military battlefield sensing. The accuracy of sensor readings is without a doubt one of the most important measures to evaluate the quality of a sensor and its network. Therefore, this work is motivated to propose approaches that can detect and repair erroneous (i.e., dirty) data caused by inevitable system problems involving various hardware and software components of sensor networks. As information about a single event of interest in a sensor network is usually reflected in multiple measurement points, the inconsistency among multiple sensor measurements serves as an indicator for data quality problem. The focus of this paper is thus to study methods that can effectively detect and identify erroneous data among inconsistent observations based on the inherent structure of various sensor measurement series from a group of sensors. Particularly, we present three models to characterize the inherent data structures among sensor measurement traces and then apply these models individually to guide the error detection of a sensor network. First, we propose a multivariate Gaussian model which explores the correlated data changes of a group of sensors. Second, we present a Principal Component Analysis (PCA) model which captures the sparse geometric relationship among sensors in a network. The PCA model is motivated by the fact that not all sensor networks have clustered sensor deployment and clear data correlation structure. Further, if the sensor data show non-linear characteristic, a traditional PCA model can not capture the data attributes properly. Therefore, we propose a third model which utilizes kernel functions to map the original data into a high dimensional feature space and then apply PCA model on the mapped linearized data. All these three models serve the purpose of capturing the underlying phenomenon of a sensor network from its global view, and then guide the error detection to discover any anomaly observations. We conducted simulations for each of the proposed models, and evaluated the performance by deriving the Receiver Operating Characteristic (ROC) curves.     

广东省普通高校大学生网球运动开展现状分析与对策研究

本文针对广东省普通高校大学生网球运动发展的现状，以广东省普通高校体育部主任、网球教师、网球教练、队员、学生以及有关的专家为调查对象。运用文献资料法、问卷调查法、访谈法、座谈法、观察法、数理统计法与理论分析法等对广东省普通高校大学生网球运动开展的现状进行调查研究，并提出建议，为广东省普通高校大学生网球运动的健康发展提供依据。     

“学导式”与电教巧结合法突破重难点的探索和实践

一堂课的成败,整个教学的得失,关键就在于是否处理好教材中突出重点,突破难点,释化疑点这一问题。教学重点是教材中起关键作用、主要作用并具有现实意义的知识内容,或者说某知识点在某课、节、框中最基本、最重要的原理。思想政治课的教学重点是指在整个教学内容中,具有决定作用的基本理论观点和德育课题。从教材体系看,它占有重要地位;从当前形势和学生的思想实际看,它是不容忽视的。教学难点,一般说来是因为某个知识点或环节比较抽象,不易理解,且知识面广而深的问题;有的是知识内容相近、相似而容易引起混淆的问题;教学重点和难点有时是重合的。由于教材的重、难、疑点在整个教学中所处的地位,所以教师要探讨和把握突出重点、突破难点、释化疑点的教学方法,才能使思想政治课真正地活起来。     

浅谈液压辅助元件的故障分析与解决措施

本文通过重点分析液压系统辅助元件在工作状态下出现的常见故障,并对其典型故障提出具有针对性的解决措施。     

财务比率分析中算术平均数陷阱与序时平均数的置入

在分析财务比率中因使用简单算术平均数而出现的种种陷阱的基础上,指出了为克服简单算术平均数易受个别或少数极端值影响和只从静态上说明总体水平的缺陷,有必要引入序时平均数,并以存货周转率、应收账款周转率和净资产收益率三个比率进行计算分析说明序时平均数能从动态上反映企业的经营状况,能更好地为企业相关者提供可靠的财务信息。     

Revision of the millipede genus Parafontaria Verhoeff, 1936 (Diplopoda,Xystodesmidae)

The xystodesmid millipede genus Parafontaria Verhoeff, 1936 is revised in the light of the geographic variation found in the genital morphology of both sexes. The following 11 species, including one new species, are recognized as valid: P. erythrosoma (Takakuwa, 1942), P. ishiii Shinohara, 1986, P. doenitzi (Karsch, 1880), P. laminata (Attems, 1909), P. crenata Shinohara, 1986, P. longa Shinohara, 1986, P. tokaiensis n. sp., P. shiraiwaensis Shinohara, 1986, P. falcifera (Verhoeff, 1936), P. spathulata (Miyosi, 1951) and P. takakuwai (Shinohara, 1957). Parafontaria tonominea (Attems, 1899) can be recognized as a species complex and is operationally defined as a species. The systematic status of P. terminalis (Takakuwa, 1942) is uncertain. The following new synonymies are proposed: Fontaria (Parafontaria) armigera Verhoeff, 1936 (currently P. laminata armigera (Verhoeff, 1936)), F. (P.) kuhlgatzi Verhoeff, 1937 (currently P. kuhlgatzi (Verhoeff, 1937)) and P. echizenensis Shinohara, 1986 with P. laminata; F. coarctata circula Attems, 1901 (currently P. circula (Attems, 1901)), F. coarctata acutidens Attems, 1909 (currently P. acutidens (Attems, 1909)), F. (Japonaria) spiraligera Verhoeff, 1937 (currently P. spiraligera (Verhoeff, 1937)), F. (J.) marmorata Verhoeff, 1937 (currently P. marmorata (Verhoeff, 1937)), Japonaria longispinosa longispinosa Miyosi, 1951 (currently P. longispinosa longispinosa (Miyosi, 1951)), J. longispinosa falcata Miyosi, 1951 (currently P. longispinosa falcata (Miyosi, 1951)), J. egregia Haga, 1968 (currently P. egregia (Haga, 1968)) with P. tonominea. A cladistic analysis based on 15 morphological characters was performed for all species except P. terminalis. The strict and majority rule (50%) consensus trees identified three and five clades, respectively, within the genus.     

社会转型期群体性事件法律成因分析及对策

随着中国社会的高速发展，各种社会矛盾不断凸现，如果处理不当，很有可能引发大规模的群体性事件，这也是转型期中国面临的一大难题。群体性事件爆发的原因是多种多样的，但究其根本则在于法律制度的不健全，不完善，导致公民利益诉求的渠道不畅通所致。本文就群体性事件的法律成因进行了分析，并提出相应的对策，以期从法律层面为群体性事件的解决提供有益的参考。