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基于J2EE的企业信息管理系统的构建——以鞋服企业为例
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作者 李小燕 《中国皮革》 CAS 2024年第1期150-153,157,共5页
对于鞋服企业而言,信息管理系统的构建是打破数据孤岛,为鞋服产品构建起数字营销一体化的重要举措。本文分析了鞋服企业信息管理系统构建的目的和意义,探讨其设计原则,并分析基于J2EE设计模式的鞋服企业信息管理系统构建的层次结构设计... 对于鞋服企业而言,信息管理系统的构建是打破数据孤岛,为鞋服产品构建起数字营销一体化的重要举措。本文分析了鞋服企业信息管理系统构建的目的和意义,探讨其设计原则,并分析基于J2EE设计模式的鞋服企业信息管理系统构建的层次结构设计及基本模块,希望能够为鞋服企业的信息管理系统构建提供参考。 展开更多
关键词 J2EE 鞋服企业 信息管理系统 层次结构设计
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校园网网络规划的设计与实现 被引量:8
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作者 吴旭东 柳炳祥 《电脑开发与应用》 2011年第11期64-65,共2页
通过对江西陶瓷工艺美术职业技术学院网络的实际情况分析,提出一套校园网解决方案。通过软件硬件升级提供一个高性能、高可靠的校园网络。对校园网各大楼网络进行合理连接,设计了层次化结构,并给出了校园网建设的网络系统结构和交换设... 通过对江西陶瓷工艺美术职业技术学院网络的实际情况分析,提出一套校园网解决方案。通过软件硬件升级提供一个高性能、高可靠的校园网络。对校园网各大楼网络进行合理连接,设计了层次化结构,并给出了校园网建设的网络系统结构和交换设备选择及校园网建设的分布、实现。实际情况表明,校园网设计运行状态良好,较好地满足学院各类综合应用的需要。 展开更多
关键词 校园网 层次结构设计 汇聚
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高中生物个性化作业设计实践初探
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作者 袁金莲 《试题与研究(教学论坛)》 2021年第21期60-60,共1页
班上的学生之间有很大的不同。家庭作业是分层设计的,要注意学生的个体差异,并在不同层次上满足学生的学习需求。这使学生可以积极参与动手制作和研究,改善学生对知识和能力的获取和使用的态度,设计个性化的作业,以帮助学生进行解答,激... 班上的学生之间有很大的不同。家庭作业是分层设计的,要注意学生的个体差异,并在不同层次上满足学生的学习需求。这使学生可以积极参与动手制作和研究,改善学生对知识和能力的获取和使用的态度,设计个性化的作业,以帮助学生进行解答,激发他们的学习兴趣,增加他们对生物学习的兴趣,并真正实现使所有学生全面成长的目标。 展开更多
关键词 高中生物 优化设计层次结构
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SDH 技术在电力通信网中的典型应用研究 被引量:1
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作者 颜丙恒 《通信电源技术》 2020年第23期183-185,共3页
由于SDH技术对优化电力通信网的信息传输和提高通信速率等方面有积极作用,所以分析电力通信网的实际应用需求,并完善SDH技术的实际应用方式,从而提升电力通信传输控制效果。分析SDH技术的基本原理与应用优越性,在此前提下,从网络层次结... 由于SDH技术对优化电力通信网的信息传输和提高通信速率等方面有积极作用,所以分析电力通信网的实际应用需求,并完善SDH技术的实际应用方式,从而提升电力通信传输控制效果。分析SDH技术的基本原理与应用优越性,在此前提下,从网络层次结构设计、用户接入设备以及通信传输等方面进行综合管理,旨在实现电力通信传输实际应用效果的提升。 展开更多
关键词 SDH技术 电力通信网 网络层次结构设计 用户接入设备
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A New Rational-based Optimal Design Strategy of Ship Structure Based on Multi-level Analysis and Super-element Modeling Method 被引量:6
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作者 Li Sun Deyu Wang 《Journal of Marine Science and Application》 2011年第3期272-280,共9页
A new multi-level analysis method of introducing the super-element modeling method, derived from the multi-level analysis method first proposed by O. F. Hughes, has been proposed in this paper to solve the problem of ... A new multi-level analysis method of introducing the super-element modeling method, derived from the multi-level analysis method first proposed by O. F. Hughes, has been proposed in this paper to solve the problem of high time cost in adopting a rational-based optimal design method for ship structural design. Furthermore,the method was verified by its effective application in optimization of the mid-ship section of a container ship. A full 3-D FEM model of a ship,suffering static and quasi-static loads, was used as the analyzing object for evaluating the structural performance of the mid-ship module, including static strength and buckling performance. Research results reveal that this new method could substantially reduce the computational cost of the rational-based optimization problem without decreasing its accuracy, which increases the feasibility and economic efficiency of using a rational-based optimal design method in ship structural design. 展开更多
关键词 rational-based optimal design method (RBODM) multi-level analysis SUPER-ELEMENT ship module genetic algorithm
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Scalable group management in large-scale virtualized clusters
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作者 Zhou Wei Wang Lei +2 位作者 Meng Dan Yuan Lin Zhan Jianfeng 《High Technology Letters》 EI CAS 2011年第3期263-271,共9页
To save cost, more and more users choose provision resources at the granularity of virtual machines in cluster systems, especially data centres. Maintaining a consistent member view is the foundation of reliable clust... To save cost, more and more users choose provision resources at the granularity of virtual machines in cluster systems, especially data centres. Maintaining a consistent member view is the foundation of reliable cluster managements, and it also raises several challenge issues for large scale cluster systems deployed with virtual machines (which we call virtualized clusters). In this paper, we introduce our experience in design and implementation of scalable member view management on large-scale virtual clusters. Our research contributions include three-aspects : 1 ) we propose a scalable and reliable management infrastructure that combines a peer-to-peer structure and a hierarchy structure to maintain a consistent member view in virtual clusters; 2 ) we present a light-weighted group membership algorithm that can reach the consistent member view within a single round of message exchange; 3 ) we design and implement a scalable membership service that can provide virtual machines and maintain a consistent member view in virtual clusters. Our work is verified on Dawning 5000A, which ranked No. 10 of Top 500 super computers in November, 2008. 展开更多
关键词 virtualized clusters consistent member view scalable group membership SGMS
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Research on failure scenarios of domes based on form vulnerability 被引量:15
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作者 YE JiHong LIU WenZheng PAN Rui 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第11期2834-2853,共20页
In this paper, form vulnerability theory was applied to the analysis of the failure mechanisms of single-layer latticed spherical shells subjected to seismic excitations. Three 1/10 scale testing models were designed ... In this paper, form vulnerability theory was applied to the analysis of the failure mechanisms of single-layer latticed spherical shells subjected to seismic excitations. Three 1/10 scale testing models were designed with characteristics as follows: Model 1 possesses overall uniform stiffness and is expected to collapse in the strength failure mode as some members become plastic; Model 2 possesses six man-made weak parts located on six radial main rib zones and is expected to collapse in the dynamic in- stability mode with all members still in the elastic stage; Model 3 strengthens the six weak zones of Model 2, and therefore, its stiffness is uniform. Model 3 is proposed to collapse in the strength failure mode when the members are still in the elastic stage By increasing the peak ground accelerations of seismic waves gradually, the shaking table tests were carried out until all three models collapsed (or locally collapsed). On the basis of form vulnerability theory, topological hierarchy models of the test models were established through a clustering process, and various failure scenarios, including overall collapse scenarios and partial collapse scenarios, were identified by unzipping corresponding hierarchical models. By comparison of the failure scenarios based on theoretical analysis and experiments, it was found that vulnerability theory could effectively reflect the weak- ness zones in topological relations of the structures from the perspective of internal causes. The intemal mechanisms of the distinct failure characteristics of reticulated shells subjected to seismic excitations were also revealed in this process. The well-formedness of structural clusters, Q, is closely related to the collapse modes, i.e., uniform changes of Q indicate a uniform distribution of overall structural stiffness, which indicates that strength failure is likely to happen; conversely, non-uniform changes of Q indicate that weak zones exist in the structure, and dynamic instability is likely to occur. 展开更多
关键词 single-layer latticed spherical shell form vulnerabifity collapse mode failure mechanism shaking table test
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Nonlinear hierarchy-structured predictive control design for a generic hypersonic vehicle 被引量:18
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作者 WANG Peng TANG GuoJian +1 位作者 LIU LuHua WU Jie 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第8期2025-2036,共12页
A hierarchy-structured predictive controller is designed and analyzed for rotation motion dynamics of a generic hypersonic vehicle(GHV).This vehicle model has fast variability,is highly nonlinear,and includes uncertai... A hierarchy-structured predictive controller is designed and analyzed for rotation motion dynamics of a generic hypersonic vehicle(GHV).This vehicle model has fast variability,is highly nonlinear,and includes uncertain parameters.The controller contains two subsystems,the inner-fast-loop nonlinear generable predictive controller(NGPC)and the outer-slow-loop NGPC,both of which are designed by the closed-form optimal generable predictive control method.Thus,the heavy on-line computational burden in the classical predictive control method is avoided.The hierarchy structure of the control system decreases the relative degree of each subsystem and helps increase the dynamic response speed of the attitude controller.In order to improve the robustness of the control system,a feedback correction algorithm is proposed that corrects the calculation error between the predictive model and the real dynamic model.Simulation studies are conducted for the trimmed cruise conditions of an altitude of 33.5 km and Mach 15 to investigate the responses of the vehicle to the step commands of angle of attack,sideslip angle,and bank angle.The simulation studies demonstrate that the proposed controller is robust with respect to the parametric uncertainties and atmospheric disturbance,and meets the performance requirements of GHV with acceptable control inputs. 展开更多
关键词 generic hypersonic vehicle flight control predictive control hierarchy-structured ROBUSTNESS
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