多传感器信息融合技术探析

多传感器信息融合是一门涉及信号处理、信息论、人工智能、模糊数学等理论的多学科交叉技术,被广泛应用于军事和民用领域。文章介绍了多传感器信息融合的概念,描述了多传感器信息融合的功能模型、主要方法和应用,并对其发展趋势进行了分析。     

细小传热管内过冷水和空气高速两相流的换热特性研究

通过理论分析和实验,研究了细小传热管内水和空气高速两相流动的紊流换热特性,确认了这种两相流动具有很同的换热系数,其机理是薄液膜的蒸发换热。只要管壁面上存在液膜,在低壁温时就可以获得稳定的高换热性能。理论分析较好地预示了实验结果。     

Attraction and Repulsion of Nucleons: Sources of Stellar Energy

The potential energy of a nuclide is enhanced by about 10 MeV per nucleon from the repulsion between like nucleons, and diminished by about 20 MeV per nucleon from the attraction between unlike nucleons. Nuclear stability results mostly from the interplay of these opposing forces, plus Coulomb repulsion of positive charges. Whereas fusion may be the primary mechanism by which first generation stars produce energy, repulsion between like nucleons may cause neutron emission from the collapsed core (neutron star) produced in a terminal supernova explosion and initiate luminosity in second generation stars that accrete on such objects. As noted earlier [1], the scarcity of solar neutrinos, the enrichment of light isotopes in the solar wind, and the presence of abundant short-lived nuclides and interlinked chemical and isotopic heterogeneities in the early solar system might also be explained if the Sun formed in this manner.     

Optimization of the transmission mechanism for wireless TCP

A novel method which can detect the possible handoffs for mobile nodes is proposed in this article. The method can be deployed on mobile nodes. So when a possible handoff occurs, mobile nodes can detect and take some necessary actions in time. In this study, the method is also used to optimize the transmission mechanism of Q-TCP. Moreover, the simulation results show that Q-TCP can provide better quality of service （QoS） for mobile nodes when they are moving among different agents.     

基于双CPU技术的泵和马达控制系统的研究与设计

为获取泵和马达的静态与动态特性,设计了基于ADμC812和TMS320F206的双CPU结构的多传感器融合与控制系统。介绍了该系统的体系结构、硬件配置、接口电路、工作原理和工作流程。实现了传感器信息融合的高速高精度采集、复杂算法的大数据量实时计算以及模拟与开关量并有的多通道控制等功能,系统硬件结构简单。该系统作为泵、马达综合试验台的子系统,用于泵、马达性能试验。应用表明该系统能够满足试验要求,具有很好的可靠性和实时性。     

用MasterCAM加工双金属材料链轮硬齿表面

运用MasterCAM软件对双金属材料链轮硬齿表面进行曲面三维造型,编程,并对链轮双金属材料硬齿表面进行曲面合理工艺设计,加工出了符合图纸要求的产品零件。阐述了MasterCAM软件在加工实例产品时编程的基本步骤,重点突出了其加工工艺和加工参数等关键问题。     

Impact of N-Terminal Tags on De Novo Vimentin Intermediate Filament Assembly

Vimentin, a type III intermediate filament protein, is found in most cells along with microfilaments and microtubules. It has been shown that the head domain folds back to associate with the rod domain and this association is essential for filament assembly. The N-terminally tagged vimentin has been widely used to label the cytoskeleton in live cell imaging. Although there is previous evidence that EGFP tagged vimentin fails to form filaments but is able to integrate into a pre-existing network, no study has systematically investigated or established a molecular basis for this observation. To determine whether a tag would affect de novo filament assembly, we used vimentin fused at the N-terminus with two different sized tags, AcGFP (239 residues, 27 kDa) and 3 × FLAG (22 residues; 2.4 kDa) to assemble into filaments in two vimentin-deficient epithelial cells, MCF-7 and A431. We showed that regardless of tag size, N-terminally tagged vimentin aggregated into globules with a significant proportion co-aligning with β-catenin at cell–cell junctions. However, the tagged vimentin aggregates could form filaments upon adding untagged vimentin at a ratio of 1:1 or when introduced into cells containing pre-existing filaments. The resultant filament network containing a mixture of tagged and untagged vimentin was less stable compared to that formed by only untagged vimentin. The data suggest that placing a tag at the N-terminus may create steric hinderance in case of a large tag (AcGFP) or electrostatic repulsion in case of highly charged tag (3 × FLAG) perhaps inducing a conformational change, which deleteriously affects the association between head and rod domains. Taken together our results shows that a free N-terminus is essential for filament assembly as N-terminally tagged vimentin is not only incapable of forming filaments, but it also destabilises when integrated into a pre-existing network.     

云计算数据中心组网技术研究

讨论云计算数据中心网络面临的新需求、新挑战,针对数据中心内部互联、数据中心之间互联的两个应用场景,梳理并提出组网技术。在数据中心内部,为满足云计算新业务需求,提出了大二层网络的组网解决方案。在数据中心之间,同样为解决二层网络延伸的问题,提出了二层VPN和MAC in IP的解决方案,满足数据中心承载的云计算业务需求,保证云计算的快速发展。     

农村广播电视数字流媒体播出前端建设

介绍农村广播电视流媒体播出前端的构建,流媒体播出前端系统硬件和软件的功能及实施过程。     

The Mighty Mitochondria Are Unifying Organelles and Metabolic Hubs in Multiple Organs of Obesity,Insulin Resistance,Metabolic Syndrome,and Type 2 Diabetes: An Observational Ultrastructure Study

Mitochondria (Mt) are essential cellular organelles for the production of energy and thermogenesis. Mt also serve a host of functions in addition to energy production, which include cell signaling, metabolism, cell death, and aging. Due to the central role of Mt in metabolism as metabolic hubs, there has been renewed interest in how Mt impact metabolic pathways and multiple pathologies. This review shares multiple observational ultrastructural findings in multiple cells and organs to depict aberrant mitochondrial (aMt) remodeling in pre-clinical rodent models. Further, it is intended to show how remodeling of Mt are associated with obesity, insulin resistance, metabolic syndrome (MetS), and type 2 diabetes mellitus (T2DM). Specifically, Mt remodeling in hypertensive and insulin-resistant lean models (Ren2 rat models), lean mice with streptozotocin-induced diabetes, obesity models including diet-induced obesity, genetic leptin-deficient ob/ob, and leptin receptor-deficient db/db diabetic mice are examined. Indeed, aMt dysfunction and damage have been implicated in multiple pathogenic diseases. Manipulation of Mt such as the induction of Mt biogenesis coupled with improvement of mitophagy machinery may be helpful to remove leaky damaged aMt in order to prevent the complications associated with the generation of superoxide-derived reactive oxygen species and the subsequent reactive species interactome. A better understanding of Mt remodeling may help to unlock many of the mysteries in obesity, insulin resistance, MetS, T2DM, and the associated complications of diabetic end-organ disease.