水资源质量分析评价系统构建与效益浅析

水资源质量分析评价系统以大幅度提升日常工作效率为出发点,以原始监测数据分析为基础,动态生成多种分析报表、统计报表,同时增加关注信息展示,大量减轻日常统计工作,基本实现水质分析统计业务的自动化。系统具有良好的扩展性,有较长的生命周期。     

Low complexity quantum private queries protocol

Private information retrieval(PIR) is an important privacy protection issue of secure multi-party computation, but the PIR protocols based on classical cryptography are vulnerable because of new technologies,such as quantum computing and cloud computing. The quantum private queries(QPQ) protocols available, however, has a high complexity and is inefficient in the face of large database. This paper, based on the QKD technology which is mature now, proposes a novel QPQ protocol utilizing the key dilution and auxiliary parameter. Only N quits are required to be sent in the quantum channel to generate the raw key, then the straight k bits in the raw key are added bitwise to dilute the raw key, and a final key is consequently obtained to encrypt the database. By flexible adjusting of auxiliary parameters θ and k, privacy is secured and the query success ratio is improved. Feasibility and performance analyses indicate that the protocol has a high success ratio in first-trial query and is easy to implement, and that the communication complexity of O(N) is achieved.     

一种实用的多数据库量子信息检索协议

针对目前量子私有信息检索不能适用与云存储的多数据库问题,基于现在成熟的量子密钥分发方法,提出了一种适合在多数据库环境下,实用的量子私有信息检索协议。对于不同大小的数据库,协议可通过调节参数θ和k,在保证数据库安全及用户隐私的情况下,完成信息的检索。性能分析结果表明,协议的通信复杂度低,检索成功率高、易于实施。     

基于大数据的智慧林业系统设计

With the development of 5G, big data, cloud computing, IOT, mobile Internet and other information technologies of new generation, the design of forestry information system establishes a new mode of forestry development integrating three-dimensional perception, collaborative management and internal and external services by means of perception, IOT and intelligence. Intelligent forestry system is a comprehensive information management system integrating forest management, intelligent forestry business management, green maintenance management and emergency command and dispatching management. Based on the specific project practice, this paper puts forward the overall framework design scheme and management platform design scheme of intelligent forest- ry.     

智能数据分区与布局研究

大数据时代,数据规模庞大,由数据进行驱动的应用分析场景日益增多.如何快速、高效地从这些海量数据中提取出用以分析决策的信息,给数据库系统带来重大挑战.同时,现代商业分析决策对分析数据的实时性要求数据库系统能够同时快速处理ACID事务和复杂的分析查询.然而,传统的数据分区粒度太粗,且不能适应动态变化的复杂分析负载;传统的数据布局单一,不能应对现代大量增加的混合事务分析应用场景.为了解决以上问题,“智能数据分区与布局”成为当前的研究热点之一,它通过数据挖掘、机器学习等技术抽取工作负载的有效特征,设计最佳的分区策略来避免扫描大量不相关的数据,指导布局结构设计以适应不同类型的工作负载.首先介绍了智能数据分区与布局的相关背景知识,然后对智能数据分区与布局技术的研究动机、发展趋势、关键技术进行详细的阐述.最后,对智能数据分区与布局技术的研究前景做出总结与展望.     

化工设备焊缝安全管理信息系统开发

通过对化工设备焊缝安全管理信息系统进行需求分析和可行性分析,完成了系统的总体设计,利用Microsoft SQL Server 2000作为后台数据库,结合Windows下可视化编程工具Visual Basic 6.0进行了系统开发。系统主要包括登录、信息管理、安全评价、系统设置、数据安全和帮助信息模块,对系统进行测试后,可以满足化工设备焊缝安全管理工作的需要。     

实时数据库系统在聚丙烯装置生产管理中的开发与应用

中国石油化工股份有限公司荆门分公司建立了一套实时数据库系统,通过网络将生产装置DCS系统内的运行数据实时采集,长期存储,为装置的生产管理提供了一个信息平台。在此基础上,笔者根据聚丙烯装置生产管理的实际需要开发了一系列新功能。这些功能的应用提高了工作效率,优化了装置的生产操作,提升了工艺管理水平,收到良好的效果。     

基于市场导向的新疆地区炼焦煤资源的开发与实践

拜城县众泰煤焦化有限公司针对新疆地区冶金焦炭市场需求,对新疆地区炼焦煤资源综合利用的问题进行立项研究,丰富和完善公司产品配方库,抢占市场机遇,取得了显著的经济效益。     

Solids transport models comparison and fine‐tuning for horizontal,low concentration flow in single‐phase carrier fluid

We determined and fine‐tuned the solids transport models appropriate for predicting the single‐phase carrier fluid velocity to transport solid particles in conduits for horizontal, low concentration flow. A database with 538 experimental data points was compiled. A literature review was performed to determine the data ranges, forces, and mechanisms used to develop 44 models, and their velocity predictions were compared against the database using statistics. Using the dimensionless forms of the models and the data, the model parameters were adjusted to improve their accuracy and identify the dominant forces. At low concentrations: for liquid/solid flow from a bed of solids and gas/solid flow from the bottom of pipelines, the particle weight, and inertial and viscous forces dominate; for gas/solid flow from a bed of solids, the particle weight, and inertial, viscous, and adhesive forces play a role; and gaps exist in the data for large‐diameter pipes and high‐density gases. © 2013 American Institute of Chemical Engineers AIChE J, 60: 76–122, 2014     

分析化学网络智能组卷系统的开发

为了进一步推动教学改革,促进教学质量的提高,我们开发了分析化学智能组卷系统,介绍了智能组卷系统开发的意义、开发过程、主要特色及使用效果,并对开发前景进行了展望。结果表明:该网络智能组卷系统具有客观性强、时间快、易于控制试卷难度等特点,深受师生和专家好评。