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农作物种质资源调查信息系统研究
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摘要
农作物种质资源调查是农作物种质资源工作的基础,通过调查可以收集农作物种质材料,获取种质资源特性、分布和数量等信息,对农作物种质资源保护和利用具有重要意义。近年来,我国在农作物种质资源调查方面做了大量工作,先后组织多次调查活动,在资源调查和信息共享方面取得重要进展和显著成效。但也存在一些不足之处,如缺乏统一的调查数据标准和规范、调查信息化程度不高、调查数据资源相对分散、缺乏全国性的农作物种质资源调查信息网络服务平台等。
     结合国家科技基础性工作专项,以建立标准统一、信息整合的通用农作物种质资源调查信息平台为目标,针对农作物种质资源调查过程中需要改进的问题,构建了农作物种质资源调查信息系统(CGRIIS),规范农作物种质资源调查工作,为调查人员提供操作便利的网络服务平台,为国家制定生物资源有效保护相关政策以及科学研究提供可靠的信息服务。
     1、制定了农作物种质资源调查数据标准
     系统分析并提取了农作物种质资源普查数据、调查数据、评价数据和保存数据等元数据信息,采用基于数据元技术的方法,构建了农作物种质资源调查数据标准;定义了完备调查数据集以及对象和属性的映射关系,并给出了基于XML数据元数据存储策略,使农作物种质资源调查在“数据层”上达到统一和规范。
     2、设计了异构环境下调查数据资源整合、数据交换和共享模型。
     分析了传统数据整合方案优缺点和中间件技术特点,设计了基于ESB的农作物种质资源调查数据整合、交换和共享模型,给出详细的数据交换模式和流程图;数据抽取以XML为载体,以XML消息格式作为各应用系统间的统一接口类型,利用采集号作为关键字段来实现不同项目调查数据种类之间的关联,给出了基于XSLT数据格式转换策略。
     3、提出了农作物种质资源调查数据安全存储方案
     分析了云存储技术特点和组织构成,结合农作物种质资源相关数据特性和数据库组成特点,探讨了基于内部云存储的农作物种质资源调查数据存储可行性,给出了存储方案的层次结构、访问方法、数据存储可靠性、扩展和部署方法,为建立统一的农作物种质资源调查数据平台提供了数据存储层支持。
     4、设计了农作物种质资源调查信息系统
     在研究面向服务体系结构(SOA)基础上,采用价值链需求分析方法识别了农作物种质资源调查服务域,提出了基于SOA的农作物种质资源调查信息系统体系结构参考模型,详述了参考模型的层次结构,定义了各个服务模块功能和主要模块的流程,为系统进一步编码和实现奠定了基础。
Crop germplasm resources investigation is the foundation of crop germplasm resources work. The information of crop germplasm resources attributes, distribution and quantity are acquired in investigation works, which play an important role in crop germplasm resources protection and utilization. In recent decades years, our government has done plenty works in crop germplasm resources investigations, organized multiple investigation projects. And significant improvements and remarkable effects are acquired in resources investigation and information sharing. However, there have some disadvantages too, such as lack of unified data investigation standards, the degree of investigation informationization was not high, the investigation resources was scattered relatively, and there was no nationwide crop germplasm resources investigation information network service platform etc.
     According to the problems mentioned above that need to be improved in crop germplasm resources investigation process, combining the national science and base work, crop germplasm resources investigation information platform was designed, which offers an information system that is normal and convenient for investigation works, provides information supports for government making effective biological resources protection policies and scientific research. The main research results acquired in this paper are as follows:
     Firstly, the crop germplasm resources investigation data standards were established.
     To achieve uniformity and standardization, normalize the construct of database and guarantee data quality of crop germplasm resources investigation on the“data layer”, investigation data, evaluation data, conservation data and general investigation data are abstracted and analyzed in this paper. And the data standards were constructed based on data element technology for crop germplasm resources investigation, the complete dataset and the mapping relationship between objects and attributes are defined.
     Secondly, the abstract model of heterogeneous environment investigation data resource integration, data exchange and sharing was designed.
     An ESB-based architecture of integration and sharing for crop germplasm resources investigation is presented based on the analysis of the traditional data integration solutions and technical features of enterprise service bus (ESB). And the data mapping and conversion model, work data flow are detailed. In the architecture, the consistency of the messages encapsulation is solved by using SOAP and the data mapping of heterogeneous database are processed by XSLT processor. Acquisition number is the keyword to connect different crop resources databases. Lastly, an effective integrated development environment to implement the architecture is recommended.
     Thirdly, the secure storage architecture for crop germplasm resources investigation was designed.
     Based on the analysis of the definition and characters of cloud storage, and combined with the characteristics of crop germplasm resources data and databases, the internal cloud storage architecture for crop germplasm resources data was designed, and the level of structure diagram, access methods, storage scalability and availability were detailed. The study on the new storage architecture gives the model for building easy extension, management and safety of crop germplasm resources data storage system.
     Lastly, the crop germplasm resources investigation information system (CGRIIS) is proposed.
     Crop germplasm resources investigation is the basis of germplasm resources management. Based on the analysis of the features of service-oriented architecture(SOA), the services domain in crop germplasm resources investigation were identified by the value chain analysis and the reference model of SOA-based crop germplasm resources investigation information system(CGRIIS) was proposed. The hierarchical structure of the reference model and the definitions of each service module functions were described. The reference model laid the foundation for system further coding and implementation.
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