An Efficient CSI Feedback Scheme for Dual-Polarized MIMO Systems Using Layered Multi-Paths Information

Massive MIMO is one of tile enabling technologies tbr beyond 4G and 5G systems due to its ability to provide beamforming gain and reduce interference Dual-polarized antenna is widely adopted to accommodate a large number of antenna elements in limited space. However, current CSI（channel state information） feedback schemes developed in LTE for conventional MIMO systems are not efficient enough for massive MIMO systems since the overhead increases almost linearly with the number of antenna. Moreover, the codebook for massive MIMO will be huge and difficult to design with the LTE methodology. This paper proposes a novel CSI feedback scheme named layered Multi-paths Information based CSI Feedback （LMPIF）, which can achieve higher spectrum efficiency for dual-polarized antenna system with low feedback overhead. The MIMO channel is decomposed into long term components （multipath directions and amplitudes） and short term components （multipath phases）. The relationship between the two components and the optimal precoder is derived in closed form. To reduce the overhead, different granularities in feedback time have been applied for the long term components and short term components Link and system level simulation results prove that LMPIF can improve performance considerably with low CSI feedback overhead.

Quality oriented multimode processes monitoring based on a novel hierarchical common and specific structure with different order information

Due to higher demands on product diversity,flexible shift between productions of different products in one equipment becomes a popular solution,resulting in existence of multiple operation modes in a single process.In order to handle such multi-mode process,a novel double-layer structure is proposed and the original data are decomposed into common and specific characteristics according to the relationship between variables among each mode.In addition,both low and high order information are considered in each layer.The common and specific information within each mode can be captured and separated into several subspaces according to the different order information.The performance of the proposed method is further validated through a numerical example and the Tennessee Eastman(TE)benchmark.Compared with previous methods,superiority of the proposed method is validated by the better monitoring results.

美军电子信息装备发展研究

电子信息装备是武器装备信息化的物质基础,是夺取并保持信息优势进而赢得决策优势的关键装备,其总体发展水平和规模在很大程度上反映了一个国家的军事实力。美军在新军事战略的指导下,积极制定和调整电子信息装备的发展计划,使电子信息装备的建设呈现出新的特点与趋势。文中主要介绍了美军电子信息装备的发展特点和发展趋势,并结合中国军队实际提出对中国军队装备信息化建设的启示。

基于多媒体听课系统实现教学质量管理的新途径

随着现代教育技术的蓬勃发展,有效地利用高新技术实现教学质量管理,促进教育教学改革的深入,最终提升高校的人才培养质量,是现代教育技术从业人员需要深入研究的技术课题。根据北京联合大学教学管理的需要,通过开发并部署跨校区的多媒体听课系统,一方面解决了该校教学质量管理的难点问题,同时也提高了教学质量管理的信息化程度。

基于Web Service的信息系统架构

分析了企业信息化过程中存在的问题,结合Web Service的技术特性,设计了一种基于Web Service的信息系统架构,其具有可重用性、可扩展性等特点,为企业内部应用系统集成及企业间信息交互提供了解决方案,最后结合实例表述了部分功能的具体实现.

基于SSH三层架构的企业门户系统

论述了通过构建基于SSH三层架构的信息发布系统运用信息化手段提高信息管理工作效率,实现信息发布、审核、显示及权限的有效控制。

Research on Virtual Agent Perception Model

An intelligent virtual environment is described for training users in the operation of complex engineering systems. After analyzing the original model of virtual environment, a virtual agent perception model was put forward. The information layer was inserted into original virtual environment. The model classifies all kinds of information and offers a way for knowledge description of virtual environment, and contributes to set up feeling model for the Virtual Agent within virtual environment.

提升寿险营销管理队伍的整体执业水平探析

寿险营销渠道在中资寿险公司发展中的战略重要性日益突出。但由于总分结构下多层级的销售管理格局，使得寿险销售管理末端职能弱化，难以与市场发展相适应。因此，中资寿险公司要在内部形成群体协作优势；强化各级寿险销售管理人员的工作职能，提高对销售队伍的信息化管理水平，将培训资源最大限度地转化为生产力：在制度上吸引和充实基层寿险销售管理队伍。从而建立一支能够贴近市场、熟悉实务、高效工作的专业化销售管理队伍，提升中资寿险公司寿险销售管理队伍的整体执业水平，带领销售队伍迈向寿险营销的新高度。