Deep learning and handcrafted features for one-class anomaly detection in UAV video

Multimedia Tools and Applications - Visual surveillance systems have recently captured the attention of the research community. Most of the proposed surveillance systems deal with stationary...     

A time cost optimization for similar scenarios mobile GIS queries

Query optimization strategies have been recently employed for various types of queries such as Geographic Information Systems (GIS) in particular Location Based Services and proximity analysis. This work proposes a new decision making mechanism called Time Cost Optimizer (TCOP) which aims to effectively reduce the cost of execution for multiple mobile GIS queries. TCOP is implemented in order to employ the new paradigm Sharing Global Execution Plans (GEP) where multiple users share the previously melted templates. It is integrated as a new component of the Query Melting Processor (QMP) that has been developed for processing multiple dynamic complex queries based on the Query Melting (QM) paradigm which consists of the sharing paradigm and the push-down strategy. An experimental evaluation has been conducted using a case study based on the map of Paris. The results analysis proved that significant saving in time can be achieved by employing the newly developed strategy.     

单涂层吸波材料匹配设计及偏差研究

本文在文献[1]提出的单涂层吸波材料设计两项原则的基础上,结合具体实例详细说明了这两项原则的具体应用.研究了一系列相关参数间的作用规律,通过分析说明这两项设计原则既可为吸波材料本身的研究提供方向性指导,又可具体指导单涂层结构设计。最后讨论了涂层电磁参数在偏离匹配条件的情况下,对涂层吸波性能影响的具体结果分析,并给出了评价吸波剂性能的评价原则及方法。     

Reactions in the Tuyere Zone of Ironmaking Blast Furnace

A series of slags can be formed in the lower part of the ironmaking blast furnace that play important roles in smooth furnace operation, and in determining iron quality and productivity. The final slag tapped from the BF has been investigated extensively as it can be collected directly. Unfortunately, difficulties in accessing the interiors of the blast furnace limit the full understanding of other slags such as primary and bosh slags. In this study, different types of samples directly obtained from the tuyere zone of the blast furnace have been systematically analyzed and characterized using scanning electron microscopy (SEM), electron probe X-ray microanalysis (EPMA), and X-ray fluorescence (XRF), with focus on the characteristics of slags formed in the tuyere level. The samples were identified into three groups according to their morphological, mineralogical, and chemical properties: (1) tuyere slags originating from the reactions between ash and dripping slags; (2) bosh slags in the CaO-SiO₂-Al₂O₃-MgO-FeO system, with a CaO/SiO₂ weight ratio of around 1.50, and Al₂O₃ and MgO concentrations close to those of final slags; and (3) coke ash that did not react with bosh slags. These findings will provide useful information on the evaluation of slags inside the blast furnace and the reactions in the tuyere zone.     

Sonoco Green Decoration of Clinoptilolite with MgO Nanoparticles as a Potential Carrier for 5-Fluorouracil Drug: Loading Behavior,Release Profile,and Cytotoxicity

Journal of Inorganic and Organometallic Polymers and Materials - Natural clinoptilolite was decorated by green MgO nanoparticles (G. MgO/Clino) and characterized as a potential drug delivery system...     

压力机电液比例位置控制系统仿真与PID校正分析

建立了压机电液比例位置控制系统数学模型,并基于MATLAB的SIMULINK工具箱对系统进行了动态仿真,最后针对仿真结果进行了详细的PID校正分析.     

辫状河致密砂岩气藏阻流带构型研究——以苏里格气田中二叠统盒8段致密砂岩气藏为例

传统的阻流带构型研究通过分析剩余油与隔夹层的空间组合关系来指导剩余油的挖潜,而对于流动性明显好于油藏的气藏中阻流带构型的研究则较少。为此,以鄂尔多斯盆地苏里格气田辫状河流相储层为例,在储层构型层次分析理论的指导下,以野外露头剖面和大量实钻水平井解剖为基础,结合生产动态分析和气藏工程验证,研究致密气阻流带存在的依据、构型级次、成因类型及规模参数,建立阻流带构型模型,并进行验证。结果表明:(1)苏里格气田辫状河复合有效砂体内存在泥岩或细粒沉积阻流带,并且阻流带是导致直井与水平井动态特征差异、直井泄气半径与实测有效砂体长度不吻合的主要原因;(2)大型辫状河阻流带可划分为河道复合体间(一级)、心滩单砂体间(二级)、心滩单砂体内(三级)共3个构型级次,其中二级阻流带包含河道间泥、泛滥平原泥、致密砂3种成因类型,三级阻流带包含落淤层及坝上沟道2种成因类型;(3)阻流带的几何形态、规模尺度、视厚度等参数差异较大,该气田中二叠统下石盒子组8段气藏水平井平均1 000 m水平段可钻遇各类型阻流带5~7个,单个视厚度介于10~200m;(4)阻流带叠置样式可划分为孤立型、侧向叠置型、堆积垂叠型和切割垂叠型等4种构型模型;(5)较之于直井,运用该研究成果,在苏里格气田通过水平井钻穿阻流带可提高天然气储量动用程度13.02%,并建议1 000 m水平段合理压裂段数介于6~8段。     

Exposure to 2.45 GHz Radiation Triggers Changes in HSP-70, Glucocorticoid Receptors and GFAP Biomarkers in Rat Brain

Brain tissue may be especially sensitive to electromagnetic phenomena provoking signs of neural stress in cerebral activity. Fifty-four adult female Sprague-Dawley rats underwent ELISA and immunohistochemistry testing of four relevant anatomical areas of the cerebrum to measure biomarkers indicating induction of heat shock protein 70 (HSP-70), glucocorticoid receptors (GCR) or glial fibrillary acidic protein (GFAP) after single or repeated exposure to 2.45 GHz radiation in the experimental set-up. Neither radiation regime caused tissue heating, so thermal effects can be ruled out. A progressive decrease in GCR and HSP-70 was observed after acute or repeated irradiation in the somatosensory cortex, hypothalamus and hippocampus. In the limbic cortex; however, values for both biomarkers were significantly higher after repeated exposure to irradiation when compared to control animals. GFAP values in brain tissue after irradiation were not significantly different or were even lower than those of nonirradiated animals in all brain regions studied. Our results suggest that repeated exposure to 2.45 GHz elicited GCR/HSP-70 dysregulation in the brain, triggering a state of stress that could decrease tissue anti-inflammatory action without favoring glial proliferation and make the nervous system more vulnerable.     

The opportunities of networks of research-practice partnerships and why CSCL should not give up on large-scale educational change

This squib continues the ongoing conversation put forward by Wise and Schwarz around the direction and future of CSCL. We focus here on the question of whether or not CSCL should seek to make educational change. Here, we take the affirmative position by conceptualizing the network of design-centric research practice partnerships. We illustrate how this could work through an ongoing instantiation called Taking Citizen Science to School, a multi-year research center with joint funding from research and practice-based governmental institutions.