数控直流稳压电源的一种实现方法

本文介绍了一种只用模拟和数字电子技术设计数控直流稳压电源的方法。     

Learnability of multi-instance multi-label learning

Multi-instance multi-label learning(MIML) is a new machine learning framework where one data object is described by multiple instances and associated with multiple class labels.During the past few years,many MIML algorithms have been developed and many applications have been described.However,there lacks theoretical exploration to the learnability of MIML.In this paper,through proving a generalization bound for multi-instance single-label learner and viewing MIML as a number of multi-instance single-label learning subtasks with the correlation among the labels,we show that the MIML hypothesis class constructed from a multi-instance single-label hypothesis class is PAC-learnable.     

实现计算机远程教育

伴随着网络和远程教育的发展,教学资源的共享和教学系统的互操作成为了一个十分重要也十分迫切的问题,这篇文章就来论述这种使我们当今社会上的教学发生了革命性变化的教育方式：远程教育。     

Anonymous multipath routing protocol based on secret sharing in mobile ad hoc networks

Because the intrinsic characteristics of mobile ad hoc networks(MANETs) cause several vulnerabilities,anonymous routing protocols attract much more attention in secure mobile ad hoc networks for the purposes of security and privacy concerns.Until recently,lots of anonymous routing protocols have been proposed.However,most of them are single path or use one path at a time,and the multipath schemes can not thwart both the passive attacks and active attacks simultaneously.Thus an anonymous multipath routing protocol based on secret sharing is proposed.The protocol provides identity anonymity,location anonymity,data and traffic anonymity by employing cryptograph technology and secret sharing in MANET communication process.Meanwhile,a hash function is introduced to detect active attacks in the data transmission process.The protocol can effectively thwart various passive attacks and reduce the successful probability of active attacks(such as interception and physical destroy attacks).Simulation results show that the proposed scheme provides a reasonably good level of network security and performance.     

物联网技术的研究与探讨

物联网是继互联网之后的又一次技术革命浪潮。本文通过对物联网的发展概况、基本概念、应用领域进行的由浅入深的研究与探讨,通过对国内外资料的分析、总结,论证了物联网体系结构的建议模型。     

数据

【3650亿】我国物联网市场规模已达3650亿 在刚刚过去的2012年，我国物联网产业市场规模达到3650亿元，比上年增长38．6％。从智能安防到智能电网，从二维码普及到“智慧城市”落地，作为被寄予厚望的新兴产业，物联网正四处开花，悄然影响着人们的生活。     

Comprehensive optimal control on seismic response of a single-tower self-anchored suspension bridge

Earthquake may cause severe damage to all kinds of bridge such as the falling down of the girder; therefore,effective measures should be employed to control the seismic displacement. In this paper,the method of comprehensive optimal control,com-bined with analytic hierarchy process,is employed to investigate the seismic response control of the Nanjing Jiangxinzhou Bridge,which is a single-tower self-anchored suspension bridge (SSSB). Also,3-dimensional nonlinear seismic response analyses are con-ducted. Three types of practical connection measures for seismic response control of SSSB are investigated,and the optimal pa-rameters of the connection devices are achieved by this method. Results show that both the elastic connection devices and the damp-ers with rational parameters can reduce the seismic displacement of the bridge effectively,but the elastic connection devices will in-crease the seismic force of the tower. When all factors are consid-ered,the optimal measure is by using the elastic connection devices and the dampers together. These results can provide references for seismic response control of SSSBs.     

GPS(RTK)技术原理及精度影响因素

简述GPS的应用以及原理,RTK技术的原理、方法、组成结构、精度影响的因素、提高精度的注意事项等等.     

简述电厂DCS控制系统工作原理

天富南热电的DCS系统采用华电南自的TCS3000系统,用以满足各种运行工况的要求,确保机组的安全、高效运行。该文讨论了模拟量控制、顺序控制、锅炉炉膛安全监控的原理方法,为今后工作提供一些经验和借鉴。     

浅谈基于物联网的校园管理

简要介绍互联网相关知识和技术,以及在目前状态下结合大学生校园管理的弊端,发挥物联网的优势,加强对校园学生的管理,是之更加人性化,更加便捷、实时。