By analyzing the limitations of several typical spatial-temporal data models(STDM) for water loss and soil erosion,the STDM based on ArcSDE version mechanism is proposed.
为实现水土流失数据库由常用的空间数据库向时空数据库的转变,并为解决水土流失“长事务”业务与常用“锁定—修改—释放”的事务处理策略间的矛盾,提出了用ArcSDE版本机制实现水土流失时空数据库的方法。
Basic principles for space kinematic simulation of basic mechanisms are presented under the environment of SolidWorks.
给出了SolidWorks环境下基本机构空间运动仿真的基本原理。
A basic mechanism is described in matrix representation based on the mechanism combination theory.
作者基于机构组合原理,用矩阵形式描述基本机构,给出了串联式、并联式和混合式3种基本机构的组合方式的符号表达方法。
Digital signature and JNI(Java native interface) technologies were used to solute the issue of access local resources and at.
该系统采用数字签名和Java本机接口方法解决了WebChart对本地资源的访问,实现了通过客户端串口对本地传感器信息的读取,并且系统采用了分布式体系结构,船舶用户不仅可以通过网络浏览器浏览海图数据,而且可以在海图平台上相互可见和交互,从而使船舶用户能够方便地通过网络实时、准确地分析和了解其周围的动静态航行环境,获取全面的导航服务。
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