Artificial neural networks paddy-field classifier using spatiotemporal remote sensing data

Monitoring changes in a paddy-field area is important since rice is a staple food and paddy agriculture is a major cropping system in Asia. For monitoring changes in land surface, various applications using different satellites have been researched in the field of remote sensing. However, monitoring a paddy-field area with remote sensing is difficult owing to the temporal changes in the land surface, and the differences in the spatiotemporal characteristics in countries and regions. In this article, we used an artificial neural network to classify paddy-field areas using moderate resolution sensor data that includes spatiotemporal information. Our aim is to automatically generate a paddy-field classifier in order to create localized classifiers for each country and region.     

现场总线和以太网在步进炉系统改造中的应用

文中介绍了西门子Profibus—DP总线和IndustrialEthemet在包钢无缝钢管厂步进炉自动控翩系统升级改造中的应用实例。S7—300可编程序控制器通过DP接口将6SE70SIMOVERT变频器和分布式I／O站联入Profibus—DP网。从而实现了对步进炉设备简单、稳定、精确的自动控制，同时通过CP343—1通讯模板将S7—300联入IndustrialEt}Iemet。直接实现步进炉区域基础级设备与二级网络以及过程级的数据交换。     

包钢工业水资源调查初探

针对包钢工业水资源的利用现状和发展趋势，进行调查与研究，提出了对策和管理控制方案。为企业的技术改造、污染治理、综合利用指出方向，为区域的环境管理、规划、科研、监测等方面提供科学依据和丰富的信息。     

Evaluation of mass-transfer characteristics in alginate-membrane liquid-core capsules prepared using polyethylene glycol

An alginate-membrane liquid-core capsule prepared using polyethylene glycol as a thickener was produced and the intracapsular mass-transfer characteristics of glucose and proteins were investigated. The apparent effective diffusivity of glucose into the capsule was 7.9x10(-10) m(2)/s, which is larger than that into alginate beads (6.5x10(-10) m(2)/s) and in water (6.7x10(-10) m(2)/s). Moreover, an encapsulation of strawberry cells did not decrease the mass transfer performance of glucose, in contrast to the case of immobilization in alginate beads or capsules prepared using xanthan gum. On the other hand, the apparent effective diffusivities of proteins from the capsule were smaller than those in alginate beads. In addition, the apparent effective diffusivities from the capsule decreased with the increasing concentration and molecular weight of polyethylene glycol used as a thickener during capsule preparation.     

A synthesis of a novel current-mode operational amplifier

In this letter, a novel current-mode operational amplifier (COA) is proposed. The proposed COA can operate at 2 V (±1 V) supply voltage. For high frequency operation it has only an npn transistor in signal path. Finally, SPICE simulation are shown to verify the performance of the proposed COA.     

A method for solving the minimization of the maximum number of open stacks problem within a cutting process

In this paper, the problem of minimizing the maximum number of open stacks around a saw machine is addressed. A new heuristic and a branch-and-bound based exact method for the problem are presented. Computational tests comparing the new approach with other algorithms previously suggested in the literature were carried out.     

薄板连铸连轧过程控制和生产管理计算机系统

从薄板坯连铸连轧生产线中过程和生产管理计算机系统的应用角度,详细地介绍了管理计算机系统从订单到生产计划的整个过程,对过程控制计算机系统的模型建立过程和计算机控制系统构成及完成的主要控制功能进行了详细说明.     

20CrMoA抽油杆用钢试制实践

文章主要介绍了20CrMoA抽油杆用圆钢试炼情况,采用转炉—精炼—小方坯连铸—连轧圆钢的工艺路线生产的产品,其各项性能及技术指标都达到设计要求。     

住房公积金贷款的风险及防范对策

文章从微观的角度,运用理论分析的方法阐述了风险产生的原因,列举了造成住房公积金贷款风险的种种可能;结合包钢住房公积金贷款风险管理的实例,针对风险产生的原因提出了具体的风险防范措施。期望能对各住房公积金管理中心在个人住房贷款风险管理方面提供有益启示和借鉴。