Learnable three-dimensional Gabor convolutional network with global affinity attention for hyperspectral image classification

Benefiting from the development of hyperspectral imaging technology, hyperspectral image (HSI) classification has become a valuable direction in remote sensing image processing. Recently, researchers have found a connection between convolutional neural networks (CNNs) and Gabor filters. Therefore, some Gabor-based CNN methods have been proposed for HSI classification. However, most Gabor-based CNN methods still manually generate Gabor filters whose parameters are empirically set and remain unchanged during the CNN learning process. Moreover, these methods require patch cubes as network inputs. Such patch cubes may contain interference pixels, which will negatively affect the classification results. To address these problems, in this paper, we propose a learnable three-dimensional (3D) Gabor convolutional network with global affinity attention for HSI classification. More precisely, the learnable 3D Gabor convolution kernel is constructed by the 3D Gabor filter, which can be learned and updated during the training process. Furthermore, spatial and spectral global affinity attention modules are introduced to capture more discriminative features between spatial locations and spectral bands in the patch cube, thus alleviating the interfering pixels problem. Experimental results on three well-known HSI datasets (including two natural crop scenarios and one urban scenario) have demonstrated that the proposed network can achieve powerful classification performance and outperforms widely used machine-learning-based and deep-learning-based methods.     

家用空调器净化技术的应用与实验研究

介绍家用空调器中常见的净化技术,对不同技术的净化效果进行了实验与分析.实验结果表明,组合功能净化效果明显优于单一功能;换气功能对去除挥发性有机化合物(TVOC)有效,去除效果与换气量成正比;电离方式对去除可吸入颗粒物(PM10)、甲醛(HCHO)、菌落总数(ABC)效果较好.     

云计算在税务信息化建设中的应用探讨

税务的信息化建设,极大的提高了征管效率,信息化建设不断增强,征收手段不断完善。本文简要的介绍云计算技术优点,对云计算在解决税务信息化问题中的应用进行了初步的分析。提出了云计算技术与税务信息化建设相结合,旨在利用云计算的先进管理技术为信息化工程遇到的问题提供经济、高效、安全的解决思路,并提出了一些应注意的问题。     

求解箱式约束全局优化问题的降维算法

本文利用有限区间降维方法,将带箱式约束的多维优化问题转化为一维优化问题.然后利用一种加速方法对一维优化问题求全局最优解,并证明该最优解是原问题的近似解.最后给出算法和数值算例结果.     

空调环境中污染物的光催化净化

大多数人大部分时间均处于室内环境之中，因而即使室内很低浓度的污染物，在长期作用于人体之后，也会影响人体健康。本文分析了空调环境中污染物的分布特征，论述了利用TiO2光催化技术净化空调环境中空气污染物的可行性以及要面对的问题。认为TiO2光催化技术是一项能耗低、易操作、安全环保的净化技术，在空调环境污染物净化方面具有广泛的应用前景。     

话说“铁元素”

正常人体内铁的总量约有3~5 g,相当于一根小铁钉的质量,60%~65%在红细胞的血红蛋白内,20%~30%的铁与蛋白结合存于肝、脾、骨髓,10%存在骨骼中。铁是必需微量元素。人体内缺铁,红细胞数目就会减少,血红蛋白量降低,以致血液带氧的功能下降,引起身体各器官组织缺氧,因而出现面色苍     

优生优育话补锌

孕妇担负着自身和胎儿的营养供给。锌是营养素之一,有“生命火花”和“智慧火花”之美称,是人体不可缺少的微量元素。锌是酶的活化剂,参与体内80多种酶的活动与代谢,它与蛋白质的合成、碳水化合物和维生素的代谢、激素的合成和内分泌的活动关系十分密切,发挥非常多也很重要的生     

加湿技术在家用空调中的应用探讨

介绍了可在家用空调中采用的加湿技术,阐述其优缺点,讨论了加湿技术应用中可能引起的问题,提出相应的对策,对两种方式的加湿效果进行了实验对比。     

人体为什么会缺乏微量元素

人体缺乏微量元素的原因有:(1)饮食搭配不当,摄入量不足。如饮食单调、偏食、食物过精等。(2)吸收差。如肠道疾病吸收不良、长期进食含植酸、纤维素过多的植物性食物,影响微量元素吸收。(3)丢失过多。如慢性腹泻、反复失血、长期多汗、尿排泄增多等。(4)需要量增多。孕妇、儿童需要增多,或紧张等因素消耗增多,如供不应求,则缺乏。(5)先天性代谢障碍疾病。人体为什么会缺乏微量元素@袁琪