摘要：With a review of the recent development in digitalization and application of seabed data, this paper systematically proposed methods for integrating seabed data by analyzing its feature based on ORACLE database management system and advanced techniques of spatial data management. We did research on storage structure of seabed data, distributed-integrated database system, standardized spatial database and seabed metadata management system in order to effectively manage and use these seabed information in practical application. Finally, we applied the methods researched and proposed in this paper to build the Bohai Sea engineering geology database that stores engineering geology data and other seabed information from the Bohai Sea area. As a result, the Bohai Sea engineering geology database can effectively integrate huge amount of distributed and complicated seabed data to meet the practical requisition of Bohai Sea en-gineering geology environment exploration and exploitation.

摘要：Based on the ArcGIS geographic information system and the ORACLE database management system,this paper reports our studies on the technology of Marine Engineering Geological Exploration Information System(MEGEIS). By analyzing system structure,designing function modules and discussing data management,this paper systematically proposes a framework of technol-ogy to integrate,manage,and analyze the seabed information comprehensively. Then,the technology is applied to the design and development of the Bohai Sea Oilfield Paradigm Area Information System. The system can not only meet the practical demands of marine resources exploration and exploitation in the Bohai Sea oilfield,but also serve as a preparatory work in theory and technology for the realization of the 'Digital Seabed'.

摘要：基于先进的空间管理技术(SDE)和数据库管理技术(ORACLE),针对海底空间数据的特点,从海底空间数据库的总体设计到栅格、矢量数据的存储结构进行了系统深入的研究,提出了一套海底空间信息集成和管理的方法,并将其成功地应用到渤海油田示范区空间数据库的建设中,以满足渤海油田工程地质环境探测和海洋工程建设的实际应用需求.

摘要：维生素C是人类必需的重要水溶性抗氧化营养素之一,然而它也是一种热敏性的化合物,与许多其他热敏性营养素相似,在高温条件下容易造成热破坏,这令在传统的加热蒸发浓缩生产果蔬汁过程中,往往会造成产品中天然有效营养成分的热损失。因而探究在冷冻浓缩条件下果汁蔬菜汁维生素C的变化,作为一般热敏性有效成分的表征,对在加工过程中保存有效成分具有很大意义。本研究利用碘量法测量维生素C,对比冷冻浓缩和蒸发浓缩前后维生素C的含量变化及损失率。结果显示,相比于传统蒸发加工生产工艺,冷冻浓缩技术不仅能减少维生素C的损失,而且由于水的冷冻潜热只有蒸发潜热的约七分之一,因而具有很大的节能降耗潜力。是符合现代社会发展的绿色生产工艺,所生产的浓缩果疏汁能有效保留其原有的营养及风味。

摘要：针对传统的刮板输送机依靠齿轮减速器调速带来维护周期短、整体效率低等问题,设计了刮板输送机滑模变结构调速系统。将滑模变结构方法运用到刮板输送机调速系统中,采用速度滑模观测器对刮板输送机转速进行观测,同时采用滑模控制器对刮板输送机进行直接转矩控制。最后构建仿真系统,结果表明:滑模变结构调速系统可有效降低刮板输送机转矩脉动,系统的鲁棒性和动态性能得到巨大提升。