Constitutive Laws of the Underground Opening Collapse due to Dynamic Load

The constitutive laws of the collapse of underground openings in a rock massif were in-vestigated based on the results of laboratory and field experiments, and computations using ana-lytical and numerical models. It is shown that the principal mechanism of failure of underground openings over important for practice peak particle velocity amplitude range of 1 to 10 m/s is the roof and wall breakage due to the fall of key blocks. Over this load range the material crushing is of considerably less importance. The geometry of discontinuities influences mainly the stability of key blocks. Further caving depends weakly on block structure of near-tunnel zone. The mean volume of fall material is a rather stable quantity for rock massifs of different structures. Lower tunnel sta-bility in the zones of high fracturing is caused by a higher probability of the presence of the unsta-ble key blocks and the decrease of strength characteristics of fractured bounding blocks. The de-crease of average block size is a less important accompanying factor.     

一种基于新阈值的视频编码全零块提早判决方法

为了降低计算复杂度和编码时间,提出了一种改进的H.264/AVC全零块提早判决方法.首先,介绍了已有的全零块判决算法,分析了3种变换后将量化为零的频域系数,并在3种不同频域伸缩因子的基础上推导出对应的空域系数.然后,根据这些空域系数,并应用Schwarz不等式原理,设定了3个全零块判决阈值,并根据全零块空域系数的分布情...     

Gender and higher education in different national spaces: Female Palestinian students attending Israeli and Jordanian universities

This study examines the higher education experience among Palestinian Arab females in two national spaces and seeks to determine whether studying at an Arab institution of higher learning in a nearby Arab country can alleviate the emotional and economic difficulties that affect Palestinian women at Israeli universities. What can institutions of higher learning in Israel learn or derive from the proposed model to relieve the alienation and exclusion that their female Palestinian students experience? The study will compare two geographically distinct groups of women students. The first is a group of Palestinian women who attend university in Jordan, while the second consists of Palestinian women of Bedouin origin from southern Israel who study in the Jewish Israeli cultural space. The study seeks to shed light on the experience of Muslim students in Western and Muslim universities.     

基于块资源模型的战略性新兴产业共性化信息需求机理研究

如今,战略性新兴产业已经提升到国家战略地位。从产业层面上来看,因为产业信息资源是企业层面信息资源的集合,所以产业层面的信息需求具有更多的共性。本文通过厘清战略性新兴产业共性化信息需求块资源模型、机理结构模型和三维驱动模型,来分析战略性新兴产业共性化信息需求机理。文章提出了产品数据信息、运营数据信息、用户需求数据信息和品牌数据信息块资源模型。在其结构关系中,产业和企业的持续发展,最基本的结构元素是"产品"。因此,以产品为核心的信息需求则成为结构机理的核心要素。在驱动关系中,用户需求驱动、效益驱动和网络结构凝聚驱动三维驱动模型驱动着信息需求在产业-企业-产品-用户的结构模型中服务于产品。基于所提出的模型,本文以战略性新兴产业专业知识服务系统为例,为系统完善提出未来发展的建议,旨在为我国战略性新兴产业相关信息资源服务平台提供依据和参考,进而推动战略性新兴产业的运行与发展。     

Word绘图工具制作的“概念——思维框图”在图书馆学研究中的应用

综合运用概念图和思维导图的基本原理,利用Word绘图工具制作"概念——思维框图",应用于图书馆学研究中的论文架构表达和辅助各类基金项目申报中的研究框架、研究思路表述。归纳总结6种"概念——思维框图"表现形式和绘制要点,以实例说明其适用范围。用Word绘图工具制作的"概念——思维框图",既包含了概念图的"网状"知识关系关联性表达,又具有思维导图"树状"发散性思维的自然表达。在绘制方面,相比各类思维导图软件,具有简便易操作、简洁易表达,单色易印刷,图式不受限等特点。     

a-块对角占优与广义严格对角占优矩阵的判定

利用α-对角占优矩阵的一些性质,获得了广义块严格对角占优季矩阵的几个判定定理,并给出数值例子来说明所得结果的有效性.     

矩阵若尔当标准型的标注

通过引入广义特征向量的概念,给出了矩阵相似若尔当化的计算方法,并探讨了若尔当标准型在控制理论中的应用.     

注塑模中隧道滑块的设计

定模隧道滑块和动模隧道滑块在现今的模具设计中越来越常见,其设计特点是该制品的外观更加美观,滑块成型面积不大,更多运用于复杂和多变的塑料产品形状和塑料模具设计.     

The EFQM self-assessment processes in HEIs in Spain and in Jordan

The purpose of this paper is to compare the European Foundation for Quality Management （EFQM） self-assessment model in higher education institutions （HEIs） in Spain and in Jordan. Case study methodology on eight services provided by a public university in Spain and seven services provided by one public university and one private university in Jordan is used. The findings show the steps that an administrative service may follow in order to apply the questionnaire approach to conduct self-assessment in a successful manner and the difficulties, benefits and success factors in both countries by comparing the results. This paper provides lessons for decision makers and managers of other universities in developing countries, who wish to perform an exercise in self-assessment using a questionnaire approach.     

块图中的团横贯集和团独立集

图的一个极大完全子图称为图的一个团．若图G的每一个块为图G的一个团,则称图G为块图．求图的一个最小团横贯集问题和最大团独立集问题分别称为MCTS问题和MCIS问题．文中给出了块图中求解最小团横贯集和最大团独立集的一个线性时间算法,并证明了块图G中的团横贯数等于团独立数,即τc（G）=αc（G）．