基于子结构法的微机械陀螺性能解析

在微机械陀螺性能健壮性设计的研究中,为了解决微陀螺性能解析的高精度和计算时间的问题,以体微机械加工技术制备的音叉振动式微机械陀螺结构为研究对象,提出了基于子结构法的微结构动态性能解析法.在实现了微陀螺的高精度解析和分析的基础上,进行了微陀螺弹性梁优化设计,得到了性能优良的微陀螺弹性梁结构.通过实例解析,不仅验证了基于子结构法的微结构动态性能解析法的有效性,而且证明了其在微机械陀螺性能设计中的潜在价值.     

波速确定在基桩反射波法检测中的应用

通过对桩身混凝土中应力波波速的讨论，提出了建筑场地工程桩平均波速的确定方法，为采用反射波检测方法校核工程桩长度，判定缺陷深度提供了方便。     

重庆中小城市可持续发展目标评估

重庆主要中小城市是指万州、涪陵市、江津市、合川市、永川市5个城市。文章以西部大开发战略和城市化战略为依据，以重庆市主要中小城市为实证对象，运用“层次分析法”和“指标得分均差分析法”相结合的评估方法，通过比较分析发现5城市存在眷经质量不高，可持续发展能力较低等问题。因此提出重庆主要小城市可持续发展的趋势是重点发展城市和县城建设，建立5市合作发展机制，提高城市可持续发展动力和能力。     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices,an interest in LBS (Location Based Service) is arising. To provide location based service,tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then,store and manage have been studied. In this paper,we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques,we update the MODBMS when moving object arrived at a street intersection or a curved road which is rpresented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique,location data that are corresponding to the node in topology are stored,thus reduce the number of update and amount of data. Also in case predicting the location, because topology are used as well as existing location information,accuracy for prediction is increased than applying linear function or spline function.     

pH和腐殖酸对水合二氧化锰去除水中铅的影响

以实验室配制模拟水为本底,考察了高锰酸钾还原法制备的水合二氧化锰对水中微量铅的混凝及强化混凝去除效能。探讨了水体pH值、腐殖酸对铅去除效果的影响以及水合二氧化锰去除水中重金属铅的机理。结果表明:水合二氧化锰对水中的微量铅具有显著的去除作用,1.5 mg.L-1的水合二氧化锰对实验室配水中铅的去除率达92%,作为助凝剂时,1 mg.L-1的水合二氧化锰可使铅的去除率达95%以上。中性和弱碱性条件下铅的去除率高于酸性条件,水中腐殖酸浓度升高使铅的去除率降低。水合二氧化锰够消除或减弱腐殖酸对铅的络合作用。     

浙江天童不同生境和攀援方式对葛藤有性生殖特征的影响初探

通过对葛藤在2种生境条件及2种攀援方式下,每个花序的平均开花数量、座果数量、种子数、单果平均干重以及座果率等有性生殖特征的数量化比较分析,探讨了不同的生境条件和攀援方式对葛藤的有性生殖特征的影响,结果表明：1）各样地葛藤种群所处立地资源差异,导致各种群在有性生殖特征（开花数量、座果数量、种子数量及座果率）的数量特征方面差异显著,尤其是生长在阳生、水分充裕的生境条件下,为攀援植物体的种群与生活在荫生环境、为匍匐植物体的种群之间差异最为显著。与荫生、无支持木的种群相比,阳生而且攀援的种群的座果率是其40倍之多,平均座果数量是其53倍,平均种子数量是其70倍,平均开花数量比它高30％;2）当攀援方式作为主导因子时,葛藤生殖特征所产生的差异更显著于生境条件作为主导因子时的差异;3）对有性生殖特征进行相关性分析．葛藤的座果率与开花数量负相关、与座果数量正相关;单果序的座果数量与种子数量和开花数量呈正相关关系。     

气候变化对血吸虫病空间分布的潜在影响

应用地理信息系统技术,探讨了划分血吸虫病流行区与非流行区的较好气温指标,并用其研究预测气候变化对血吸虫病空间分布的潜在影响。研究表明,随着全球气候变暖以及中国南水北调工程的实施,若钉螺扩散,且适宜钉螺孳生的其他条件满足,则存在钉螺北移的风险。若干年后,全球气候变暖对钉螺的分布和血吸虫病的防治将带来挑战,对此应给予足够的重视。     

基于B/S模式的村镇社区服务信息平台构建——以马鞍山市郑蒲港姥长村镇为例

面对全球信息化浪潮,信息化建设日益受到重视,我国十六届六中全会首次提出了"积极推进农村社区建设"要求,但产业聚集区村镇社区信息科技支撑能力弱,信息水平仍然落后,针对这种现象,本文以马鞍山市郑蒲港姥长村镇为例,开展信息化支撑技术等方面的研究,使用面向对象的方法设计并开发了社区服务信息平台,为社区的居民之间和居民与物业公司之间搭建信息化平台,提供了良好的服务。     

基于IDC的云计算应用研究

为了缓解移动通信枢纽电力资源压力, 解决硬件设备陈旧老化, 满足当前业务量和数据量提取、 转换和加载, 通过云计算的分布式计算、 虚拟化技术和ETL（Extraction Transformation Loading）工具等方法, 对IDC（Internet Data Center）机房中BASS（Business Analysis Support System）系统的数据集市云架构进行了改造升级。经过实际测试应用表明, 改造升级的BASS系统的数据集市在数据处理方面更加精细化； 在数据量交互计算方面, 更加均衡、 稳定、 高效； 同时, 降低了BASS系统整体运营成本, 提高了基础资源的效率。