ARM多维天线阵控制系统的设计

介绍基于ARM和CPLD的多维天线阵控制系统的设计。系统采用串行通信方式,用ARM嵌入式系统与CPLD相连接取代传统上采用的计算机连接CPLD方式的控制,由于ARM的运用使系统控制阵列天线更具智能化、应用程序更简化,CPLD的使用大大增加了与外设相连接的引脚数,满足了项目中对多条控制线的需求。作为主控制器的ARM取代了PC机,ARM具有体积小、集成度高、运算速度快、存储器容量大、功耗低等特点,节约了项目成本,缩小了整机体积,增强了系统的稳定性和灵活性,在实际应用中取得了理想的效果。     

多维度TD-SCDMA网络覆盖分析方法研究

在日常的网络质量评估中,优化人员通常根据DT、网管统计等某一方面数据进行判断,因受时间、地点、位置的限制较大,分析的结果不能较全面、准确地反映网络问题。在综合分析ATU、MR等分析手段的基础上,给出了一种多维度的TD-SCDMA网络覆盖分析方法,其对ATU、MR、网管统计及经分数据进行多角度的关联,达到精确评估TD网络覆盖的目的,进而为市场提供参考实现TD终端的精确营销。     

Fluorescence Intrinsic Characterization of Excitation-Emission Matrix Using Multi-Dimensional Ensemble Empirical Mode Decomposition

Excitation-emission matrix (EEM) fluorescence spectroscopy is a noninvasive method for tissue diagnosis and has become important in clinical use. However, the intrinsic characterization of EEM fluorescence remains unclear. Photobleaching and the complexity of the chemical compounds make it difficult to distinguish individual compounds due to overlapping features. Conventional studies use principal component analysis (PCA) for EEM fluorescence analysis, and the relationship between the EEM features extracted by PCA and diseases has been examined. The spectral features of different tissue constituents are not fully separable or clearly defined. Recently, a non-stationary method called multi-dimensional ensemble empirical mode decomposition (MEEMD) was introduced; this method can extract the intrinsic oscillations on multiple spatial scales without loss of information. The aim of this study was to propose a fluorescence spectroscopy system for EEM measurements and to describe a method for extracting the intrinsic characteristics of EEM by MEEMD. The results indicate that, although PCA provides the principal factor for the spectral features associated with chemical compounds, MEEMD can provide additional intrinsic features with more reliable mapping of the chemical compounds. MEEMD has the potential to extract intrinsic fluorescence features and improve the detection of biochemical changes.     

面向Kubernetes的容器立体化监控系统

容器监控是保证容器基础设施正常运行的核心要素之一,然而当前容器监控角度较为单一,尚缺少直观有效的方法协助运维人员快速定位业务容器异常原因.本文设计并实现了一个面向Kubernetes的容器立体化监控系统,通过监控指标相关性分析,把相关性较强的指标作为立体化监控的核心指标提供给运维人员,更好地实现对容器的全局统筹监控.     

基于数字孪生的采煤机预测性维护研究

数字孪生被列为十大战略科技发展趋势之一,将在煤矿行业中发挥重要作用。提出了基于数字孪生技术的采煤机预测性维护方法,提出了多维数字孪生模型,初步建立了预测性维护流程以及具体实施步骤,并对各部分进行了介绍。     

Finite-Sized Atom Reconstruction Enhanced High-Frequency Multi-Domain Magnetic Response

The technological advances in wearable electronics and military stealth have spawned extensive research into electromagnetic wave absorbents. Despite the rapid progress in the geometrical modulation of magnetic absorbents, the engineering strategy of microwave-responsive magnetic domains is underdeveloped and the response dynamics remain unclear. Herein, a surface finite-sized atom reconstruction procedure is proposed to accurately modulate the local magnetic topological domains, dramatically enhancing the magnetic loss capacity. Due to the selectivity of atom reconstruction, vortex and stripe domains are controllably hybridized around the porous surface to broaden the interactive domain region, significantly intensifying energy absorption of the microwave field. Meanwhile, the amorphous/crystalline interfaces around atom reconstruction regions can induce interfacial polarization, enabling the optimization of dielectric loss capacity. Therefore, a satisfactory magnetic–dielectric synergy is realized to demonstrate the strong absorption intensity of −31.2 dB and the broad absorption bandwidth of 5.9 GHz. Furthermore, the surface-based magnetic domain transformation and microwave energy attenuation mechanisms are thoroughly revealed to break the black box of structure–function through electron holography and micromagnetic simulation. These achievements demonstrate a promising solution to improve high-frequency magnetic properties and provide a feasible route to interpret the structure-relevant magnetic loss capacity.     

多维多点输入下大跨空间网格结构的可靠度分析

本文同时考虑地震动两个水平向和一个竖直向共三个平动分量,并考虑了地震动场的空间相关性,在虚拟激励反应谱法的基础上,对大跨空间网格结构进行了多维多点输入和多维一致输入下的抗震可靠度分析。考查了两种输入方法下危险杆件在结构分布、数量等方面的差异以及危险杆件随结构跨度、视波速的变化关系。     

基于多维布隆过滤器的模式匹配引擎

针对传统的模式匹配引擎不具备完整报文检测功能的问题和出现的速度瓶颈,提出了基于FPGA实现的多维布隆过滤器解决方案,设计了能够同时检测报头和有效负载的多模式匹配引擎。引擎使用多维布隆过滤器过滤出可疑报文,由位拆分状态机进行精确匹配。分析和试验结果表明：与传统方法相比,基于多维布隆过滤器的模式匹配引擎可以并行检测报头和报文内容,在降低过滤器误判率的同时,有效提高了引擎的吞吐量。     

多维作业空间下的装配式建筑工程资源调度

装配式建筑促进传统建造方式向现代工业化建造方式的转变,但其现场装配、构件生产、运输物流等多维作业空间的异地域与非同步特点,常导致建造资源调度性质各异、相互牵制,并成为其推广应用的重要瓶颈问题。该文以装配式建筑工程为对象,深入分析其建造方式的特性,研究其建造过程中分布于各作业空间的建造资源协同机理|在多空间信息共享前提下,以人工、设备等建造资源协调配置为核心,提出基于时间轴多维作业调度空间降维处理技术、信息共享下多维作业空间资源调度协同技术、现场装配作业空间最优资源线确定技术|建立了装配式建筑工程资源调度方法并进行实证分析。结果表明,该调度方法能有效确定各作业空间的排产进度计划并提供额外决策支持信息。     

RELAP5 analyses on the influence of multi-dimensional flow in the core on core cooling during LSTF cold-leg intermediate break LOCA experiments in the OECD/NEA ROSA-2 Project

Test-2 and Test-7 of the second Organization for Economic Co-operation and Development / Nuclear Energy Agency (OECD/NEA) Rig-of-Safety Assessment (ROSA-2) Project were performed with the Large Scale Test Facility (LSTF), which simulated thermal-hydraulic responses during a pressurized water reactor cold-leg intermediate break loss-of-coolant accident (IBLOCA). Test-2 simulated 17% cold-leg break with single failure of an emergency core cooling system (ECCS). The core liquid level decreased to the bottom at loop seal clearing (LSC), causing high cladding temperature excursion. Test-7 simulated 13% cold-leg break with full injection of the ECCS. Compared to Test-2, the cladding surface temperature in Test-7 was quite low due to greater liquid level recovery after the LSC. To well understand the observed phenomena and to improve the best-estimate code predictive capability, RELAP5 post-test analyses were performed. The RELAP5 analyses employed two core models: one is a single-channel core model that simulates the whole core with one channel of a vertical stack of nine equal-height volumes, and the other is a multiple-channel core model that is composed of three channels in which adjacent vertically stacked volumes are horizontally connected with cross-flow junctions. The analyses with the multi-channel core model predicted better than with the single-channel core model for such parameters as core-collapsed liquid level and cladding surface temperature for both Test-2 and Test-7, by more realistically representing multi-dimensional flow in the core. Such a practical method for better representation of multi-dimensional flows turned out to be important to improve the IBLOCA analysis.