Subjects: Library Science,Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract: [Purpose/significance] To design an effective integration architecture for multi-source heterogeneous data of public cultural service institutions such as libraries and cultural centers. [Method/process] Based on the full analysis of the public cultural big data resources, this paper analyzed the types and distribution of the public cultural service big data, and designed the integration architecture of the public cultural big data in combination with the application scenarios of the public cultural service big data. [Result/conclusion] This paper proposes a public data service big data integration architecture consisting of 5 layers: data source layer, system integration layer, data fusion layer, storage layer and application layer, and discusses key technologies such as acquisition and storage.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-12-13 Cooperative journals: 《计算机应用研究》
Abstract: Aiming at the single description and the noise sensitive problems of the local binary pattern(LBP) , a multi-scale adaptive threshold local ternary pattern(MSALTP) algorithm is proposed. The algorithm first enlarges the original images . Secondly, divides the images into several regions equally and calculates the mean value of the pixels. Then calculates the deviation between the center and the mean pixel value of each region. Finally, extract the ALTP features and the resulting statistical features histograms are used to classify the images. Experiments show that the proposed algorithm recognition rates are higher than the current anti-noise algorithms under different noise.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2018-09-03 Cooperative journals: 《干旱区研究》
Abstract:结合降水量、湿地蓄水量以及水面面积数据,研究扎龙盐沼湿地近年来的旱化特征及其对湿地演替的影响。结果表明:近年来,扎龙湿地呈现出持续干旱的状态是多种要素综合作用的结果。1970年以前,研究区的旱涝情况主要受自然环境的影响(降水量的年际变化、厄尔尼诺事件以及太阳黑子周期性变化等);1970年以后,湿地的旱涝程度是自然环境与人为活动共同作用的。1860—1970年,扎龙湿地旱涝变化以3~6 a和20~30 a周期为主。近半个世纪以来,扎龙湿地表现出干旱缺水的状态,其原因主要与人类活动限制了乌裕尔河上游径流进入湿地有关。扎龙湿地持续干旱缺水导致大面积沼泽消失并形成盐渍化土壤,研究区盐渍土面积已经由1979年的170 km2增加到2017年的245 km2,并且有相当一部分土壤盐渍化过程发生在湿地核心区。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-20 Cooperative journals: 《计算机应用研究》
Abstract: This paper researched Image matching issue and proposed a feature point matching algorithm to improve the BRIEF algorithm. The proposed algorithm generated the feature point description operator according to the difference signs and the difference magnitudes relation between the random point and the feature point. BRIEF was sensitive to noise because the small difference magnitude is more susceptible to the noise. To solve this problem, This paper determined a small pixel difference threshold by the neighborhood mean value of the BRIEF. Comparing the Hamming distance between descriptions realizes the feature points matching. Compared with BRIEF and ORB algorithm, the experiments proved that the operator has higher discriminant, simple calculation and good noise suppression performance. And the matching accuracy is higher.
Subjects: Environmental Sciences, Resource Sciences >> Basic Disciplines of Environmental Science and Technology submitted time 2019-08-02 Cooperative journals: 《干旱区地理》
Abstract:乌裕尔河流域水环境的变化导致下游湿地迅速退化。探讨了近65 a(1951—2015)扎龙湿地系统对乌裕尔河流域径流量变化的响应。结果表明:乌裕尔河中下游的径流量急剧减少给下游湿地的演替带来明显的影响,上游来水供给不足导致湿地长期处于干旱缺水的状态,湿地水面面积与蓄水量显著减少,并导致扎龙湿地地下水位显著降低(P<0.05)。湿地持续干旱缺水引发此区域大面积的沼泽退化并发生次生盐渍化。近年来,扎龙湿地发育的盐渍土面积达到250 km2以上,并且向核心区蔓延。湿地持续退化对在湿地栖息和繁殖的珍稀水禽带来巨大的冲击。