基于隶属度改进的模糊K-均值算法

通过对模糊聚类K-均值算法进行分析,针对隶属度归一可能引起结果偏差,对隶属度进行了改进,并进行了实验比较,验证了改进的有效性.     

基于PCA的聚类分析在汶川地震灾情分类中的应用

利用主成分分析(PCA)运用SPSS软件对汶川地震36个严重受灾县市的8个灾情指标进行了综合分析,得到了累积贡献率为83.403％的3个主成分及其得分;然后,基于3个主成分的得分采用聚类分析对汶川地震36个严重受灾县市进行了分类;得到了全面、合理和科学的分类结果.     

ISO9000族标准在电工电子实验室建设中的应用

电工电子实验室建设是电子类高校建设的重要组成部分,许多电子类高校在电工电子实验室建设中存在不规范性,这些不规范严重阻碍了电子电工实验室的建设。为提高电工电子实验室质量,引入ISO9000族理念,针对电工电子实验室存在的问题,制定了电工电子实验室规范性建设方针、操作流程,构建了电子类高校实验室的质量保障体系。     

Diachroneity of continental subduction and exhumation: Constraints from the Permian-Triassic HP metamorphic terrane in the Tongbai orogen, central China

High-pressure （HP） metamorphic terrane in the Tongbai orogen comprises two HP slices （I and II） and a tectonic m61ange zone in the northeast and a blueschist-greenschist zone in the southwest. HP slice I is represented by the northern and southern eclogite zones on the two sides of the Tongbaishan antiform. HP slice II is represented by retrograded eclogite-bearing metamorphic en- claves in Cretaceous gneissic granites in the Tongbai Complex. U-Pb, Lu-Hf, Rb-Sr and 4Ar/39Ar multichronometric data indi- cate that the peak metamorphism of HP slice I took place at -255 Ma, whereas the metamorphic ages of HP slice II are as young as 232-220 Ma. By contrast, the tectonic melange zone near the suture was metamorphosed at -256 Ma. Such a diachroneity of dif- ferent slices across the direction of the orogen in the Hong＇an-Dabie-Sulu HP/UHP terrane is ubiquitous, and it can be interpreted by a syn-subduction detachment/exhumation model. Furthermore, the metamorphic age of HP slice I in the Tongbai orogen is older than that of the equivalent HP slice in the Hong＇an orogen by ~15 Ma, suggesting that the diachroneity may have also ex- isted along the direction of the orogen. A seesaw-type subduction/exhumation model is proposed to explain this age disparity and the subduction of the South China Block becomimg shallower towards the west.     

Cooperative shift estimation of target trajectory using clustered sensors

In this paper, a mathematical model for target tracking using nonlinear scalar range sensors is formulated first. A time-shift sensor scheduling strategy is addressed on the basis of a k-barrier coverage protocol and all the sensors are divided into two classes of clusters, active cluster, and submissive cluster, for energy-saving. Then two types of time-shift nonlinear filters are proposed for both active and submissive clusters to estimate the trajectory of the moving target with disturbed dynamics. The stochastic stability of the two filters is analyzed. Finally, some numerical simulations are given to demonstrate the effectiveness of the new filters with a comparison of EKF.     

共生理论视角下集群式产业转移进化博弈分析

在新一轮产业转移浪潮中,集群式转移成为主要的产业转移模式,它是指集群产业链中纵向关联或横向关联企业的抱团迁徙,企业之间抱团迁徙的发生正是由于集群企业长期发展而形成的强共生关系。集群企业之间的共生关系与生物种群之间的共生关系极其相似,因此本文引入共生理论,构建集群式产业转移进化博弈模型,探讨对称互惠共生模式与非对称互惠共生模式下集群式转移达到进化稳定的条件,为我国中西部地区制定产业承接政策提供了重要启示。     

基于ISO 9000和CMM的关键实践的应用软件开发项目监理规范

结合应用软件开发项目监理的内容和流程,从应用软件开发项目质量角度,将ISO 9000和CMM两套标准体系进行比较、归纳、抽取出实现应用软件开发项目监理可参照的规范,并应用在我国信息系统工程监理实践中是一种可行的解决方案.     

质量管理体系建立与应用探讨

概述了质量、质量管理和质量管理体系的定义,介绍了ISO 9000族质量管理体系标准,探讨了建立和实施质量管理体系的意义及具体实施步骤,指出在质量管理体系中存在的一些错误做法.     

北祁连山含镁纤柱石高压泥质岩及其对古大洋俯冲的意义

北祁连山发育有缝合带是一条典型的早古生代大洋型俯冲带。针对该缝合带中首次发现的含镁纤柱石高压泥质片岩进行了详细的岩石学和矿物学研究。根据平衡矿物组合,利用THERMORCAL(V3.23)计算出镁纤柱石+石榴石+硬绿泥石+多硅白云母组合稳定的温压条件为P=2.2～2.5GPa,T=530～580℃。利用纤柱石和硬绿泥石的稳定范围,确定了北祁连山早古生代大洋冷俯冲的地热梯度的范围为6.5～7.5℃/km。该研究结果对于了解早古生代时期大洋俯冲带的热结构及其高压变质岩石的脱水过程有重要意义。     

传感器网络层次拓扑控制关键问题研究

拓扑控制是无线传感器网络的核心问题之一,而层次拓扑控制技术是拓扑控制的主要研究方向。本文对无线传感器网络层次拓扑控制的关键问题进行了分析与研究,提出了解决这些问题的一些方法。